WO2016047319A1 - Absorbent article - Google Patents

Abstract

[Problem] To provide an absorbent article with excellent odor-counteracting effects when disposed. [Solution] An absorbent article provided with an odor-counteracting tape (70): which comprises a first gas barrier layer (71) connected to a pant-type disposable diaper and a second gas barrier layer (72) peelably applied on either the front or back surface of said first gas barrier layer (71) via an adhesive (73) containing an odor-counteracting agent; and with which odor is counteracted when the pant-type disposable diaper is disposed by peeling the second gas barrier layer (72) from the first gas barrier layer (71) to expose the adhesive (73) on the outer surface.

Description

Absorbent articles

The present invention relates to an absorbent article provided with odor countermeasure means after use which is excellent in odor countermeasure effect at the time of disposal.

Absorbent articles such as disposable diapers and sanitary napkins are rounded or folded so that the surface is on the inside when discarded after use (hereinafter also referred to as a discarded state), and highly sealed such as sanitary boxes and diaper storage containers In some cases, the container is temporarily stored in a storage container, and when the amount stored in the container reaches a certain level, the container is disposed in a garbage bag and discarded.

For this reason, disposable diapers are generally provided with an adhesive tape on the outer surface of the article as a post-treatment means for fixing in a rolled state after use. In the tape type, the back side is connected to the ventral side. It is common to use a fastener tape for this purpose as post-processing means. Moreover, in the sanitary napkin, the individual packaging sheet provided with the adhesive tape is wound and stopped with the adhesive tape.

Since the odor of excrement is released from the absorbent article after use, even if it is stored in a highly sealed container, it will cause discomfort to the user when the container is opened and closed. In order to solve this problem, various means for dealing with odor of excrement have been proposed.

Odor countermeasures are roughly classified into two types: masking with fragrances such as fragrances, and odor adsorption (deodorization / deodorization) with adsorbents. Among these, as examples of masking, those in which fragrance is released from the microcapsule when the fastener tape is attached and detached (see Patent Document 1), those in which urination is triggered to release the fragrance (see Patent Document 2), and the like have been proposed. ing. Moreover, as an example of the odor adsorption by the adsorbent, a deodorizing sheet containing zeolite is disposed inside the top sheet (see Patent Document 3), or a crepe paper that wraps the absorbent contains a deodorizing agent ( For example, it has been proposed to contain a deodorant at a position on the outer surface side after use (see Patent Documents 5 and 6).

However, most of the conventional products start to release or adsorb fragrance immediately after production, and there is a problem of sustainability and performance deterioration that the effect becomes weak when odor control is required, and sustainability. In order to ensure the above, there is a problem that the room for selection of the fragrance and the adsorbent is narrowed.

On the other hand, those that release fragrance from the microcapsule when attaching and detaching the fastener tape, and those that fragrance when triggered by urination are excellent in terms of performance degradation. Since the origin is hidden inside, the problem is that the release of the fragrance to the outside is suppressed. Moreover, in these things, when it applies to the disposable diaper for infants etc., since the masking effect is exhibited during use, there exists a possibility that it may become difficult to know the replacement | exchange time of a diaper by the smell of excrement. Furthermore, the former has a problem in that a microcapsule is essential, and the latter has a problem in that a fragrance is limited.

Japanese National Patent Publication No. 11-509455 JP 2013-177424 A JP 2001-046423 A JP 2000-350745 A JP 2010-154928 A JP 2010-125127 A

Therefore, a main problem of the present invention is to provide an absorbent article that is excellent in odor countermeasure effect at the time of disposal.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A first gas barrier layer connected to the absorbent article, and a second gas barrier that is detachably attached to either one of the front and back surfaces of the first gas barrier layer with an adhesive containing an odor control agent. With odor control tape, including layers,
The odor countermeasure tape is a measure for odor by peeling the second gas barrier layer from the first gas barrier layer and exposing the adhesive to the outer surface when the absorbent article is discarded.
An absorbent article characterized by the above.

(Function and effect)
In this way, the odor control tape is sandwiched between the first gas barrier layer and the second gas barrier layer, and the odor control agent is sealed with the first gas barrier layer, the second gas barrier layer and the adhesive, If the structure is effective by the user's peeling operation, the performance is unlikely to deteriorate. In addition, by disposing the pressure-sensitive adhesive containing the odor control agent on the outer surface when the absorbent article is discarded, the odor control agent is not hidden inside and the odor control effect is not suppressed. Therefore, it becomes excellent in the odor countermeasure effect at the time of disposal. Further, since the odor control agent is hardly effective during use of the absorbent article, there is no possibility that it becomes difficult to know the diaper replacement time due to the odor of excrement.

<Invention of Claim 2>
The absorptive article according to claim 1 provided with a fixing means which fixes said 2nd gas barrier layer exfoliated from said 1st gas barrier layer to an outer surface of an absorptive article.

(Function and effect)
Thus, by making it possible to fix the second gas barrier layer peeled from the first gas barrier layer to the outer surface of the absorbent article, it is possible to prevent the second gas barrier layer from reattaching to the first gas barrier layer. Further, when the odor-preventing agent-containing pressure-sensitive adhesive remains in both the first gas barrier layer and the second gas barrier layer at the time of peeling, the exposed area of the pressure-sensitive adhesive can be doubled.

<Invention of Claim 3>
The absorbent article of Claim 1 or 2 with which the said odor countermeasure agent is mixed with the said adhesive, without being enclosed in a microcapsule.

(Function and effect)
The odor-preventing agent-containing adhesive of the present invention is not used as a fastener tape fixing means as in Patent Document 1 (the adhesive as a fastener tape fixing means is adhered to the outer surface of the diaper at the time of disposal and exposed to the outer surface. Not), and a decrease in adhesive strength is unlikely to be a problem. Moreover, the odor control agent is contained by the first gas barrier layer, the second gas barrier layer, and the pressure-sensitive adhesive, and the performance is unlikely to deteriorate. Therefore, it is preferable to make the structure simpler by directly mixing without enclosing in the microcapsule as described in this section.

<Invention of Claim 4>
As an adhesive for releasably attaching the second gas barrier layer to the first gas barrier layer, an adhesive containing an odor control agent is applied in an elongated shape, and the odor is applied along both side edges extending in the longitudinal direction. The absorbent article according to any one of claims 1 to 3, wherein a pressure-sensitive adhesive containing no countermeasure agent is extended.

(Function and effect)
Although the odor control agent of the present invention is contained by the first gas barrier layer, the second gas barrier layer, and the adhesive, the peripheral surface of the adhesive is exposed to the outside from between the first gas barrier layer and the second gas barrier layer. Therefore, even before the second gas barrier layer is peeled off, the performance of the odor control agent is deteriorated from this portion even though it is very slight. Therefore, as described in this section, it is preferable that the adhesive containing the odor control agent is applied in an elongated shape, and both sides in the direction orthogonal to the longitudinal direction are closed with the adhesive not containing the odor control agent.

<Invention of Claim 5>
The odor countermeasure tape is a post-treatment tape used to fix the absorbent article in a rolled state,
The post-treatment tape has a structure in which a plurality of strips having gas barrier properties are folded back in the longitudinal direction to form a folded state in which a plurality of layers are laminated, and adjacent layers are bonded together with an adhesive. And
In a state where the post-treatment tape is expanded from the folded state, either one of the front and back surfaces is a surface having an adhesive that fixes the rolled state, and the opposite surface has an adhesive containing the odor control agent. The surface,
The absorbent article according to any one of claims 1 to 4.

(Function and effect)
It is preferable to construct an odor countermeasure tape using the post-treatment tape as described above, since the odor countermeasure can be automatically performed at the time of disposal. Further, in this embodiment, since the pressure-sensitive adhesive for post-treatment fixation and the pressure-sensitive adhesive containing an odor control agent are separated, the fixing force is reduced by not including the odor control agent in the pressure-sensitive adhesive for post-treatment fixation. (Of course, the post-treatment fixing adhesive may contain an odor control agent).

<Invention of Claim 6>
The absorbent article according to any one of claims 1 to 4, wherein the odor control tape is dedicated to odor control.

(Function and effect)
By dedicating the odor countermeasure tape to odor countermeasures instead of using it as a post-treatment tape, the exposed area of the adhesive, the shape and arrangement of the odor countermeasure tape can be freely designed, and more desirable odor countermeasures. It can be performed.

<Invention of Claim 7>
The odor control agent according to any one of claims 1 to 6, wherein the odor control agent contains a fragrance, and the fragrance is added to at least a part of the constituent material other than the odor control tape in the absorbent article. Absorbent article.

(Function and effect)
When the odor control agent contains a fragrance, if the fragrance is also given to other constituent materials of the absorbent article, the fragrance strength is increased stepwise before and after peeling of the odor control tape. can do.

As described above, according to the present invention, there are advantages such as an excellent odor countermeasure effect at the time of disposal.

It is a top view in the state where the diaper was developed showing the inside of a pants type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. FIG. 3 is a cross-sectional view taken along the line 3-3 in FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along the line 5-5 in FIG. It is a top view in the state where the diaper was developed showing only the principal part of a pants type disposable diaper. It is sectional drawing which shows only the principal part of a pants type disposable diaper. It is a perspective view of a pants type disposable diaper. It is a side view of an odor countermeasure tape. It is a side view of an odor countermeasure tape. It is a top view which shows the principal part of an odor countermeasure tape. (A) Side view of odor countermeasure tape, (b) Plan view. It is a side view of an odor countermeasure tape. It is a side view of an odor countermeasure tape. It is a side view of an odor countermeasure tape. It is a perspective view which shows roughly the post-processing state of a pants type disposable diaper. It is a side view of an odor countermeasure tape. It is a side view of an odor countermeasure tape. It is a side view of an odor countermeasure tape.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 to 8 show an example 100 of a pants-type disposable diaper. The pants-type disposable diaper 100 includes an exterior body 12 that forms the outer surface (back surface) of the product, and an interior body 200 that is attached to the inner surface of the exterior body 12. Symbol Y indicates the total length of the diaper in the unfolded state (vertical length from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and symbol X indicates the total width of the diaper in the unfolded state. Is shown.

The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior body 12 is a part that supports the interior body 200 with respect to the wearer's body. In addition, the dot pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members, and by applying solid, bead, curtain, summit, spiral, etc., such as hot melt adhesive, and the elastic elastic member The fixed portion is formed by coating on the outer peripheral surface of an elastic expansion / contraction member such as a comb gun or a shroud coating instead of or together with this. As the joining means for joining the constituent members, welding means such as heat sealing and ultrasonic sealing can be used.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a surface sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. Yes, it is the main body that has the absorption function. Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Shows a three-dimensional gather 60 that stands on the body side and is provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

(Surface sheet)
The top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable. If bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. .

The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

When the three-dimensional gather 60 is provided, both sides of the top sheet 30 pass between the liquid-impermeable sheet 11 and the three-dimensional gather 60 to the back side of the absorbent element 50 to prevent the liquid from penetrating. It is preferable to adhere to the impermeable sheet 11 and the three-dimensional gather 60 with a hot melt adhesive or the like.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided to quickly transfer the liquid that has passed through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance of the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be made into the state which carried out. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably 10 ~ 80g / m ^2, more preferably 15 ~ 65g / m ^2. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent body 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric provided with a plastic film on the surface of the nonwoven fabric, or a plastic film For example, a laminated sheet in which a nonwoven fabric or the like is laminated and bonded to each other can be exemplified. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabric using micro-denier fibers, leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as applying a superabsorbent resin or hydrophobic resin or water repellent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.

The liquid-impermeable sheet 11 has a width that fits on the back side of the absorbent element 50 as shown in the drawing, and in order to improve leakage prevention, the liquid-impermeable sheet 11 wraps around both sides of the absorbent element 50 and faces the side surface 30 of the absorbent element 50. It can also extend to both sides of the. The width of this extended portion is suitably about 5 to 20 mm on the left and right.

Further, an excretion indicator whose color is changed by absorption of the liquid component can be provided on the inner side of the liquid-impermeable sheet 11, particularly on the side of the absorber 56.

(Three-dimensional gather)
The three-dimensional gather 60 is a belt-like member that extends over the entire front-rear direction along both side portions of the interior body 200, blocks urine and soft stool that move in the lateral direction along the top sheet 30, and prevents side leakage. It is provided for this purpose. The three-dimensional gather 60 of the present embodiment is provided so as to stand up from the side portion of the interior body 200, the base side portion rises obliquely toward the center in the width direction, and the tip side portion from the intermediate portion has a width. It stands up diagonally outward in the direction.

More specifically, the three-dimensional gather 60 folds the belt-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folds it into two. In addition, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. A base end portion (an end portion on the side opposite to the sheet folding portion in the width direction) located on the opposite side to the front end portion of the three-dimensional gather 60 is an attachment portion 65 fixed to the back surface of the side edge portion of the interior body 200. A portion other than the attachment portion 65 is a protruding portion 66 (a portion on the folded portion side) protruding from the attachment portion 65. The projecting portion 66 includes a base side portion that extends toward the center in the width direction, and a tip side portion that is folded back outward in the width direction from the tip of the base side portion. This form is a surface contact type three-dimensional gather, but a line contact type three-dimensional gather (not shown) that is not folded outward in the width direction can also be employed. And the fixing means by material welding, such as a hot-melt adhesive (alternatively or in combination with this, a heat seal or an ultrasonic seal) is applied to the side surface of the topsheet 30 with both ends in the front-rear direction of the protruding portion 66 lying down. The front-rear direction fixing portion 67 is fixed to the front-rear direction intermediate portion, and the front-rear direction intermediate portion located between them is the non-fixed free portion 68. The free portion 68 is elongated along the front-rear direction. The elastic member 63 is fixed in an extended state.

The gather sheet 62 is made of a spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric with excellent uniformity and concealment, and water repellent with silicon as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elongated elastic elastic member 63, rubber thread or the like can be used. When spandex yarn rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. The term “elongation rate” means a value when the natural length is 100%. Further, as shown in the drawing, a waterproof film 64 can be interposed between the gather sheets folded in two.

The number of the elongated elastic elastic members 63 provided in the free part of the three-dimensional gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange | positioned the elongate elastic expansion-contraction member 63, it will become easy to contact | abut with respect to skin. The elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side.

The fixing target of the attachment portion 65 of the three-dimensional gather 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, the absorbent element 50 in the interior body 200.

In the three-dimensional gather 60 thus configured, the contraction force of the elongated elastic elastic member 63 acts so that both ends in the front-rear direction are brought close to each other, but the both ends in the front-rear direction of the protruding portion 66 are fixed so as not to stand up. On the other hand, since they are non-fixed free portions, only the free portions stand up against the body side as shown in FIG. In particular, when the attachment portion 65 is positioned on the back surface side of the interior body 200, the three-dimensional gather 60 stands up so as to open outward in the width direction at the crotch portion and in the vicinity thereof. It comes in contact, and the fit is improved.

The dimensions of the three-dimensional gather 60 can be determined as appropriate. In the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the three-dimensional gather 60 (the length in the width direction of the protruding portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, particularly 20 to 40 mm. In addition, when the three-dimensional gather 60 is folded flat so as to be parallel to the surface of the top sheet 30, the separation distance W3 between the folds located on the innermost side is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

It should be noted that, unlike the illustrated embodiment, double (two rows) of three-dimensional gathers can be provided on the left and right sides of the interior body 200.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps the entire absorbent body 56. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as necessary a synthetic fiber tow (fiber bundle) such as cellulose acetate, in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be, for example, about 100 to 300 g / m ² when stacking cotton-like pulp or short fibers, and about 30 to 120 g / m ² for filament aggregates, for example. Can do. The fineness in the case of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

Although the absorbent body 56 may be rectangular, as shown in FIG. 6, as shown in FIG. 6, the hourglass has a front end portion, a rear end portion, and a narrow portion narrower than the front end portion and the rear end portion. The shape is preferable because the fit of the absorber 56 itself and the three-dimensional gather 60 around the legs is improved.

Further, the size of the absorber can be determined as appropriate, but it preferably extends to the peripheral edge of the interior body or the vicinity thereof in the front-rear direction and the width direction. Reference numeral 56X indicates the width of the absorber 56.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the superabsorbent polymer particles 54, those used for this type of absorbent article can be used as they are, for example, by sieving (shaking for 5 minutes) using a 500 μm standard sieve (JIS Z8801-1: 2006). The proportion of particles remaining on the sieve is preferably 30% by weight or less, and the proportion of particles remaining on the sieve by sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006). Is preferably 60% by weight or more.

The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Superabsorbent polymer particles include starch, cellulose and synthetic polymers, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose cross-link. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.

Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be generally stated, it can be 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

If necessary, the superabsorbent polymer particles can adjust the spray density or spray amount in the plane direction of the absorber 56. For example, it is possible to increase the application amount of the liquid excretion site as compared to other sites. When gender differences are taken into account, men can increase the front spray density (amount), while women can increase the center spray density (amount). In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edges of the absorbent body 56 are protruded from the front and back of the absorbent body 56, and the protruding portions are crushed in the front and back directions and joined by a joining means such as a hot melt adhesive.

(Exterior body)
The exterior body 12 has a portion constituting a front body F extending from the center in the front-rear direction to the ventral side and a portion constituting a rear body B extending from the center in the front-rear direction to the back side. The side seal portion 12A is formed by joining both sides of the back body B and both sides of the back body B, and as shown in FIG. 8, the waist opening WO for passing the wearer's torso and the left and right for passing the legs A pair of leg openings LO are formed.

The exterior body 12 includes a waist portion T defined as a longitudinal range (a longitudinal range extending from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a longitudinal range ( An intermediate portion L defined by a vertical region having the side seal portion 12A of the front body F and a vertical region having the side seal portion 12A of the rear body B. The waistline portion T can be divided into a “waist edge portion” W that conceptually forms an edge portion of the waist opening and a “waist lower portion” U that is a lower portion than this. Usually, when there is a boundary (for example, the thickness or elongation rate of the elastic elastic member changes) in the waistline portion T, the waist opening WO side is closer to the waist edge than the waist opening WO side boundary. When there is no such boundary, the waist opening WO side becomes the waist edge W with respect to the absorbent body 56 or the interior body 200. The length in the vertical direction varies depending on the size of the product and can be determined as appropriate. For example, the waist edge W can be 15 to 40 mm, and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate portion L are bundled along the circumference of the wearer's leg, and this is a portion into which the wearer's leg is put. As a result, the exterior body 12 has a substantially hourglass shape as a whole. The degree of tightness of the exterior body 12 can be determined as appropriate. As shown in FIGS. 1 to 8, the narrowest portion may be narrower than the width of the interior body 200 in order to obtain a clean appearance. Although it is preferable, the narrowest part may be determined so as to be equal to or larger than the width of the interior body 200.

As shown in FIGS. 3 to 5, the outer package 12 is formed by bonding two sheet materials 12S and 12H with an adhesive such as a hot melt adhesive, and is an inner sheet material positioned inside. 12H extends only to the edge of the waist opening WO, but the outer sheet material 12S wraps around the edge on the waist side of the inner sheet material 12H and is folded inside thereof, and the folded portion 12r is the inner body 200. It extends so that it may cover even to the waist side edge part.

The sheet materials 12S and 12H can be used without particular limitation as long as they are in sheet form, but are preferably non-woven fabrics. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, the basis weight is preferably about 10 to 30 g / m ² .

In addition, the total weight of the exterior body 12 is preferably about 20 to 60 g / m ² so that the design of the printing sheet 25 described later can be satisfactorily seen from the outer surface of the product through the exterior body 12. The total light transmittance specified in 7105 is preferably 40% or more, particularly 50% or more.

In the exterior body 12, elongated elastic elastic members 15 to 19 such as thread rubber are provided at a predetermined elongation rate between the sheet materials 12S and 12H in order to improve the fit to the periphery of the trunk. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the two sheet materials 12S and 12H of the exterior body 12 and fixing the elongated elastic elastic members 15 to 19 sandwiched between them, hot melt bonding or heat sealing or ultrasonic bonding by various coating methods is used. it can. If the entire exterior body 12 is firmly fixed, the texture of the sheet is impaired, which is not preferable. By combining these, it is preferable that the elongated elastic elastic members 15 to 19 are firmly bonded, and the other portions are not bonded or are bonded weakly.

More specifically, between the inner side surface of the inner sheet material 12H and the outer surface of the folded portion 12r of the outer sheet material 12S at the waist edge W of the rear body B and the front body F, the entire width direction is continuous. In addition, a plurality of waist edge elastic elastic members 17 are fixed in a state where they are extended along the width direction at a predetermined extension rate at intervals in the vertical direction. In addition, one or a plurality of the waist edge elastic elastic members 17 disposed in the region adjacent to the waist lower part U may overlap with the interior body 200 or may overlap with the interior body 200. You may each provide in the width direction both sides except a direction center part. The waist edge elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to It is preferable to fix the thread rubber of about 1.0 mm ² ) at an interval of 4 to 12 mm at about 3 to 22 pieces and an elongation of 150 to 400%, particularly about 220 to 320%. Further, the waist edge elastic elastic members 17 need not all have the same thickness and elongation rate. For example, the elastic elastic members may have different thicknesses and elongation rates at the upper and lower portions of the waist edge W. .

Further, between the outer side surface of the inner sheet material 12H and the inner side surface of the outer sheet material 12S in the lower waist portion U of the front body F and the rear body B, except for the central portion in the width direction overlapping the interior body 200, A plurality of waist lower elastic elastic members 15, 19 made of an elongated elastic elastic member, which are continuous in the entire width direction at each of the upper and both sides in the width direction, are spaced apart in the vertical direction and have a predetermined width. It is fixed in an expanded state along the width direction at an expansion rate.

The waist elastic elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. It is preferable to fix the thread rubber of about 1 to 15 mm ² ) at an interval of 1 to 15 mm, particularly 3 to 8 mm, and about 5 to 30 pieces, respectively, with an elongation of 200 to 350%, particularly 240 to 300%.

Further, the width between the outer side surface of the inner sheet material 12H and the inner side surface of the outer sheet material 12S in the intermediate portion L of the front body F and the rear body B, except for the widthwise central portion overlapping the interior body 200, is the width. A plurality of intermediate elastic elastic members 16 made of an elongated elastic elastic member, which are continuous in the entire width direction at each part on both sides in the direction, spaced in the vertical direction and at a predetermined elongation rate in the width direction It is fixed in a stretched state.

The intermediate elastic elastic members 16 and 18 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to It is preferable to fix the thread rubber of about 1.0 mm ^{2 at} 5 to 40 mm, particularly about 2 to 10 at intervals of 5 to 20 mm, with an elongation of 150 to 300%, particularly 180 to 260%.

In addition, as shown in the drawing, the waist lower elastic member 15 and the intermediate elastic members 15, 19, 16, 18 are provided on both sides in the width direction except for the center portion in the width direction overlapping the interior body 200. Then, the interior body 200 does not shrink more than necessary in the width direction, and it does not look bad and absorbability does not deteriorate. In this form, in addition to the form in which the elastic stretchable member exists only on both sides in the width direction, the elastic stretchable member exists from one side of the width direction to the other side across the interior body 200, but overlaps the interior body 200. At the center in the width direction, the elastic expansion / contraction member is finely cut, and the contraction force does not act (substantially equivalent to not providing the elastic expansion / contraction member), and only the both sides in the width direction are configured as the contraction force acting portions. Are also included. Of course, the arrangement of the waist lower elastic member 15 and the intermediate elastic members 15, 19, 16, 18 is not limited to the above example, so that the elastic force acts on the entire width direction of the waist lower U. A part or all of the waist lower elastic member 15 and the intermediate elastic members 15, 19, 16, 18 may be provided across the interior body 200 from one side to the other side in the width direction.

In addition, when the elongated elastic elastic members 15 to 19 of each part cross a printing sheet 25 described later, when rubber containing titanium oxide is used as the elongated elastic elastic members 15 to 19, the content of titanium oxide is It is preferable to use a low one (for example, 2% or less) or one containing no titanium oxide.

(Print sheet)
A printing sheet 25 that is designed by printing is provided between the liquid-impermeable sheet 11 and the outer package 12 (including the layers of the outer package 12). The exterior body 12 may be omitted and the printing sheet 25 may be exposed on the outer surface. The printed sheet 25 in the illustrated example has a smaller area than the body on which the printed sheet 25 is disposed, and is provided separately for the front body F and the back body B, but passes through the crotch from the front body F. It can also be provided so as to continue to the back body B integrally.

The size and shape of the printing sheet 25 are not particularly limited, but it is preferable to sufficiently increase the area in order to achieve a sufficient function. For example, the width of the printing sheet 25 is 50 to 120 of the width of the absorber 56. The length of the printing sheet 25 is preferably about 15 to 30% of the total length Y of the article on at least one side of the stomach and the back. Further, the shape of the print sheet 25 is preferably a rectangle as shown in the figure in that trim loss does not occur. However, the print sheet 25 has a geometric shape such as a circle, an ellipse, a triangle, a hexagon, or a shape along the periphery of the design. You may cut it.

As a sheet material of the printing sheet 25, a plastic film, a nonwoven fabric, paper, or the like can be used, but a bulky material having high air permeability is preferable. When using a plastic film, it is desirable to have moisture permeability in order to prevent stuffiness. Nonwoven fabrics and paper are preferable because they have moisture permeability, and when performing design printing, it is preferable to use nonwoven fabrics that are smooth and easy to print, and papers that are high in strength and difficult to bleed ink. Particularly preferred are crepe paper (thin paper) having a basis weight of about 15 to 35 g / m ² and a thickness of about 0.1 to 0.3 mm, and a basis weight of about 10 to 25 g / m ² and a thickness of about 0.1 to 0.3 mm. Non-woven fabrics (especially spunbond nonwoven fabrics and SMS nonwoven fabrics having a spunbond portion having a fineness of about 1.0 to 3.0 dtex). When crepe paper is used, the crepe rate is preferably about 5 to 20%, particularly about 5 to 15%. If the crepe rate is 20% or more, the amount of ink fixed increases, but blurring occurs and is not suitable for design printing. If the crepe rate is 5% or less, the amount of fixing is small because the ink hardly penetrates.

(External body split structure)
In the above-described example, the front body F to the back body B are continuously covered by the integrated exterior body 12. However, the exterior body and the back side exterior body covering the stomach side of the wearer's torso and the back And the front end portion of the interior body is connected to the inner surface of the central portion in the width direction of the ventral side exterior body by a hot melt adhesive or the like, and the center in the width direction of the back side exterior body. The rear end part of the interior body is connected to the inner surface of the interior part by a hot melt adhesive or the like, and the abdominal side exterior body and the back side exterior body are not continuous on the crotch side, and a form in which they are separated is also adopted. Can do. This separation distance can be about 150 to 250 mm. In this case, on the back surface of the liquid-impermeable sheet in the interior body, the crotch is formed so as to cover the entire back surface of the interior body or to cover the entire portion exposed between the abdominal exterior body and the back exterior body. The exterior body can also be fixed. As the crotch outer casing, the same materials as those used for the outer casing described above can be used. The crotch outer body also corresponds to the outer body of the present invention.

(Odor control tape)
An odor countermeasure tape 70 (a point that also serves as a post-treatment tape will be described later) is provided at the center in the width direction on the outer surface of the rear body B of the exterior body 12. That is, as shown in FIG. 9, the odor countermeasure tape 70 has a first gas barrier layer 71 connected to the outer surface of the exterior body 12 and an odor countermeasure agent on the outer surface of the first gas barrier layer 71. A second gas barrier layer 72 that is detachably attached via an adhesive 73 contained therein, and when the diaper is discarded, the second gas barrier layer 72 is peeled off from the first gas barrier layer 71 as shown in FIG. The odor countermeasure is performed by exposing the adhesive 73 to the outer surface.

Thus, the odor countermeasure tape 70, the adhesive 73 containing the odor countermeasure agent is sandwiched between the first gas barrier layer 71 and the second gas barrier layer 72, and the odor countermeasure agent is the first gas barrier layer 71, the second gas barrier layer 72 and the adhesive. If it is contained in the agent 73 and has a structure that is effective by the user's peeling operation, the performance is unlikely to deteriorate. In addition, when the diaper is disposed of, the adhesive 73 containing the odor countermeasure agent is exposed to the outer surface, so that the odor countermeasure agent is not hidden in the interior and the odor countermeasure effect is not suppressed. Therefore, it becomes excellent in the odor countermeasure effect at the time of disposal. Further, since the odor control agent is hardly effective during use of the absorbent article, there is no possibility that it becomes difficult to know the diaper replacement time due to the odor of excrement.

When the second gas barrier layer 72 is peeled from the first gas barrier layer 71, the pressure sensitive adhesive 73 containing an odor control agent is subjected to a peeling process such as a release agent on the surface of one of the gas barrier layers as shown in the figure. In addition to being in a form that remains only on the surface of the other gas barrier layer (second gas barrier layer in the illustrated example), it remains on both surfaces of the first gas barrier layer 71 and the second gas barrier layer 72 (that is, the pressure-sensitive adhesive 73 layer). It is also possible to adopt a form of peeling in the middle in the thickness direction. In the former form, when the second gas barrier layer 72 is removed, the pressure-sensitive adhesive 73 layer is left on the first gas barrier layer 71 remaining in the diaper.

In the illustrated embodiment, the first gas barrier layer 71 is directly fixed to the outer surface of the diaper. However, the first gas barrier layer 71 can also be indirectly connected through another member (the term “connection” of the present invention includes a direct connection). In addition to being fixed and connected, it may include indirect connection). On the other hand, even if the second gas barrier layer 72 is connected to the first gas barrier layer 71 or is configured to be completely separable from the first gas barrier layer 71, a part thereof is fixed to the outer surface of the diaper so as to be peelable. May be. When the second gas barrier layer 72 includes a fixing means for directly or indirectly fixing to the outer surface of the diaper after being peeled from the first gas barrier layer 71, the second gas barrier layer 72 is formed on the first gas barrier layer 71. The situation where re-adhesion can be prevented, and when the odor-preventing agent-containing adhesive 73 remains in both the first gas barrier layer 71 and the second gas barrier layer 72 during peeling, the exposed area of the adhesive 73 is doubled. You can also. This fixing means is constituted by an adhesive 74 of a third sheet S3 to be described later in the illustrated example, but may be other means such as a hook material of a mechanical fastener.

The first gas barrier layer 71 and the second gas barrier layer 72 can be used without any limitation as long as they have gas barrier properties. Examples thereof include olefin resins such as polyethylene and polypropylene, and synthetic resins such as polyvinyl chloride and PET. Can be suitably used. Each of the first gas barrier layer 71 and the second gas barrier layer 72 may be composed of a plurality of layers in addition to a single layer. The degree of gas barrier property of each of the gas barrier layers 71 and 72 can be determined as appropriate, but preferably has an oxygen permeability measured by JIS K 7126 of 10,000 cc / (m ² · 24Hr · atm) or less, More preferable is 000cc / (m ² · 24Hr · atm) or less. The gas barrier layers 71 and 72 may have the same or different gas barrier properties. For example, when making the gas barrier properties of the first gas barrier layer 71 and the second gas barrier layer 72 different, it is preferable to increase the gas barrier property of the second gas barrier layer 72 located outside the first gas barrier layer 71. When the gas barrier layer is further provided outside the first gas barrier layer 71 and the second gas barrier layer 72 as in the embodiment, the gas barrier layer closer to the adhesive 73 containing the odor control agent has a higher gas barrier property (that is, in the illustrated embodiment). The gas barrier properties of the first gas barrier layer 71 and the second gas barrier layer 72 are preferably higher than those of the outer gas barrier layer.

The adhesive 73 is not particularly limited, and a synthetic rubber adhesive, a natural rubber adhesive, an acrylic resin adhesive, a silicon resin adhesive, or the like can be used.

As the odor control agent mixed in the adhesive 73, at least one of a fragrance and an odor adsorbent can be used. As the fragrance, either natural fragrance or synthetic fragrance may be used. However, the masking effect on the odor of excrement (the effect of competing with or competing with the odor and making it difficult to feel the odor), particularly the harmony effect (odor) It is preferable to use a scented scent aimed at achieving an uncomfortable feeling. Specific examples of the fragrances include Ryusen Incense, Benzo Incense, Kaigo Incense, Spirit Cat Incense, Clove Oil, Galvanam, Jasmine Absolute, Labanam, Mate Tea, Merilot, Mimosa, Musk Tonkin, Myrrh, Oak Moss, Milk Incense, Bikushi Incense, Oris, Naturally extracted fragrances such as batchure, rosemary oil, sandalwood oil, vetiver oil, violet leaf absolute, higher alcohol, aldehyde, benzaldehyde, benzoic acid, cinnamic acid, cinnamic aldehyde, cinnamon alcohol, coumarin, ester, indole, ketone And various synthetic fragrances such as salicylic acid and related compounds, terpenoids and vanillin, or a mixture of two or more thereof, but are not particularly limited thereto. Commercially available products can be widely used as fragrances. It is preferable to use a fragrance having high volatility. When the fragrance is used, it is preferable to contain about 1 to 5% by weight of the fragrance with respect to the adhesive 73, and the area of the externally exposed surface of the adhesive 73 at the time of disposal is preferably about 500 to 3000 mm ² . If the content of the fragrance is too small, it is necessary to ensure a large externally exposed area of the pressure-sensitive adhesive 73, and if it is too large, the adhesive force of the pressure-sensitive adhesive 73 may be reduced. Moreover, if the area of the externally exposed surface of the pressure-sensitive adhesive 73 is too small, it is necessary to increase the content of the fragrance, which may lead to a decrease in the adhesive strength, and if it is too large, it may be difficult to ensure it.

As the odor adsorbent, either a deodorizing agent (physical adsorption) or a deodorizing agent (chemical adsorption) may be used, or both may be combined. The odor adsorbent may be an individual such as particles or a liquid. Examples of the deodorizer include activated carbon, silica gel, zeolite (aluminosilicate having a three-dimensional skeleton structure), layered structure particles composed of zirconium phosphate, three-dimensional structure particles composed of silicate, zinc oxide, and the like from known deodorizers, One type or two or more types can be appropriately selected and used. Can be used. In addition, the deodorant can be selected from one of known ones or two or more types without particular limitation, and contains a metal ion that chemically adsorbs odor molecules, for example, ions in a substance. Examples include those obtained by substituting some or all of exchangeable ions with silver ions, copper ions, zinc ions, etc. More specifically, some or all of the ion exchangeable ions in the zeolite may be used. Part or all of the ion-exchangeable particles in silver phosphate particles (Zeomic (registered trademark) of Sinanen Zeomic Co., Ltd.) and zirconium phosphate are substituted with copper ions. comprising Te particles _{(Zr 3 (PO 4 · Cu} 2+)), some or all of ion-exchangeable ions formed by replacing copper ion particles in the silicate, zinc oxide particles, in silicate Some or all of the on-exchangeable ions may be exemplified particles or the like to be replaced with zinc ions. As an example, a deodorization (chemical adsorption) reaction formula by copper ions is as follows. In this case, the odor molecule and the metal ion are coordinated to form a complex ion.
Cu ²⁺ + H ₂ S → H ₂ S: Cu ²⁺

The odor control agent can be enclosed in a microcapsule as described in Patent Document 1, but the odor control agent-containing adhesive 73 of the present invention is not used as a fastener tape fixing means as in Patent Document 1. No (adhesive as a fixing means of the fastener tape is adhered to the outer surface of the diaper at the time of disposal and is not exposed to the outer surface), and a decrease in adhesive strength is unlikely to be a problem. Further, the odor control agent is enclosed by the first gas barrier layer 71, the second gas barrier layer 72, and the pressure-sensitive adhesive 73, and the performance is unlikely to deteriorate. Therefore, it is preferable that the odor control agent has a simpler structure by being directly mixed without being enclosed in the microcapsule.

The pressure-sensitive adhesive 73 that bonds the first gas barrier layer 71 and the second gas barrier layer 72 may all be a pressure-sensitive adhesive 73 containing an odor control agent, but the odor control agent includes the first gas barrier layer 71, the second gas barrier layer 72, and the second gas barrier layer 72. Although the two gas barrier layers 72 and the pressure-sensitive adhesive 73 contain the peripheral surface of the pressure-sensitive adhesive 73, it is exposed to the outside from between the first gas barrier layer 71 and the second gas barrier layer 72. Even before peeling off, the performance of the anti-odor agent progresses from this site, albeit very little. Therefore, as shown in FIG. 11, the adhesive 73 containing the odor control agent is applied in an elongated shape, and the adhesive 75 not containing the odor control agent is extended along both side edges extending in the longitudinal direction. Closing is also a preferred form. In this case, as shown in the figure, both sides in the direction orthogonal to the longitudinal direction of the adhesive 73 containing the odor control agent (equal to the longitudinal direction of the odor control tape 70 in the illustration) are not containing the odor control agent. In addition to sealing with the agent 75, the entire periphery of the adhesive 73 containing the odor control agent can be surrounded by the adhesive 75 containing no odor control agent. In addition, as in the form shown in FIG. 11, a plurality of pressure-sensitive adhesives 73 containing an odor control agent can be provided at intervals in the direction along the surfaces of the first gas barrier layer 71 and the second gas barrier layer 72.

The first gas barrier layer 71 and the second gas barrier layer 72 of the odor countermeasure tape 70 may be separate members that can be completely separated. However, as shown in FIG. Gas barrier material can be used) is folded back multiple times in the longitudinal direction, and it is desirable to be constituted by a pair of adjacent layers in a folded structure formed by adhering adjacent layers through an adhesive 73 . In this case, the band-like body can be formed by connecting a plurality of sheets S1 to S4 as shown in FIG. 9, or can be formed by a single sheet as shown in FIG. When the belt-like body is formed by connecting a plurality of sheets, the number of sheets is not particularly limited, and it may be composed of four sheets as shown in FIG. 9, or five sheets S1 to S1 as shown in FIG. It can be configured with S5, or can be configured with fewer or more sheets.

In such a form in which the strips are folded back multiple times, it is not necessary for all of the pressure- sensitive adhesives 73 and 74 to contain an odor countermeasure agent, and at least the pressure-sensitive adhesive 73 that adheres to at least a part of the outer surface when discarded. It is sufficient that an odor control agent is contained, and the adhesive 74 that is not exposed to the outer surface at the time of disposal is preferably not containing an odor control agent from the viewpoint of adhesive strength, but may be included.

The embodiment shown in FIG. 9 will be described in more detail. The odor countermeasure tape 70 also serves as a post-treatment tape used for fixing the absorbent article in a rolled state, and has strips S1 to S4 having gas barrier properties. Is folded in the longitudinal direction to form a folded state in which a plurality of layers are laminated, and adjacent layers are bonded together with adhesives 73 and 74, and the odor countermeasure tape 70 is In the unfolded state, either one of the front and back surfaces is a surface having an adhesive 74 that fixes the diaper in a rolled state, and a part of the opposite surface has an adhesive 73 containing an odor control agent. It is considered as a surface. It is preferable to configure the odor countermeasure tape 70 using the post-treatment tape as described above, because odor countermeasures can be automatically performed at the time of disposal. In this embodiment, the post-treatment fixing pressure-sensitive adhesive 74 and the pressure-sensitive adhesive 73 containing the odor-controlling agent are separated from each other. Therefore, the post-processing fixing pressure-sensitive adhesive 74 is fixed by not containing the odor-controlling agent. The decrease in force can be prevented (of course, the post-treatment fixing adhesive 74 may contain an odor control agent).

The post-processing and odor countermeasure tape 70 shown in the figure has a first sheet S1 coated with an adhesive 73 on the surface on the exterior body 12 side and fixed to the outer surface of the exterior body 12 by the adhesive 73, and the first sheet. Tri-folded (Z-shaped cross section) by the second sheet S2 connected to the front end folded back in S1 and the third sheet S3 fixed to the front end folded back in the second sheet S2. While the structure is formed, the second sheet S2 is detachably bonded to the first sheet S1 by the adhesive 73 applied to the surface on the first sheet S1 side, and the third sheet S3 is the surface on the second sheet S2 side. It is adhered to the second sheet S2 so as to be peeled off by the adhesive 74 applied to the surface. The surface opposite to the adhesive 73 side of each sheet S1 to S3 can be peeled by being subjected to a peeling process such as a release agent, and the adhesives 73 and 74 between the sheets S1 to S3 are bonded to each other. The part and the adhesive part to the exterior body 12 are connected so as not to peel off. In addition, a colored tape S4 colored in an opaque color such as white by an adhesive 74 is connected to the leading end of the third sheet S3 to form a knob portion having good visibility. At the time of disposal, the diaper 100 is rolled or folded so that the top sheet 30 is on the inside and the front body F is on the inside, and then the post-treatment and odor countermeasure tape 70 is peeled off and spread, as shown in FIG. The third sheet S3 is fixed with the adhesive 74 so as to be wound from the back body B of the rolled or folded diaper 100 to the outer surface on the opposite side beyond the waist opening WO. At this time, the adhesive 73 of the second sheet S2 is exposed on the outer surface. Therefore, in such a Z-fold structure post-processing and odor control tape 70, at least the pressure-sensitive adhesive 73 of the second sheet S2 contains the odor control agent, and the first sheet S1 and the second sheet S2 are the first sheet of the present invention. By using the gas barrier layer 71 and the second gas barrier layer 72, the adhesive 73 can be exposed to the outer surface at the time of disposal. In this case, as described above, it is desirable not to include the odor control agent in the adhesive 74 of the first sheet S1 and the third sheet S3, but it can also be included.

In the case of such post-processing and odor countermeasure tape 70, considering the case where the knob is pinched or the diaper is rolled and fixed, the dimensions of the odor countermeasure tape 70 are 10 mm or more in width and 50 mm or more in length. Is preferable.

As long as the adhesive containing the odor control agent is exposed on the outer surface when discarded, it can be applied to other known post-treatment tapes. 12 and 13 show that the third sheet S3 and its third sheet S3 can be cut and raised by surrounding a part 76 of the second sheet S2 with a U-shaped perforation m (which may be cut in advance). Except that the adhesive 74 and the fourth sheet S4 are omitted, the configuration is basically the same as that shown in FIG. In this case, among the adhesive 73 of the second sheet S2, the adhesive 73 of the cut-and-raised portion 76 is used for fixing the post-processing, and the other adhesives 73 are exposed on the outer surface. A similar post-treatment tape is disclosed in JP-A-11-76302, and the present invention can be carried out by adding an odor control agent to the adhesive.

Further, as shown in FIG. 19, the first sheet S1 constituting the first gas barrier layer 71 is fixed to the outer surface of the diaper, and the second sheet S2 constituting the second gas barrier layer 72 is adhered to the first sheet S1. The adhesive 73 can be peeled off and the adhesive 73 can be left on both the first sheet and the second sheet when the second sheet S2 is peeled from the first sheet S1. In this embodiment, the second sheet S2 is completely separated from the first sheet S1 and used as a single post-processing tape, while the adhesive 73 remaining on the surface of the first gas barrier layer 71 is exposed to the outside. Take odor countermeasures. A post-processing tape having the same structure as that described in JP-A-7-250865 is available, and the present invention can be carried out by adding an odor control agent to the adhesive.

On the other hand, the odor countermeasure tape 70 is not used as a post-treatment tape but is dedicated to odor countermeasures, and can be provided at an appropriate place such as the outer surface of the diaper. In this case, the above-described structure may be adopted, but as shown in FIG. 14, the first sheet S1 constituting the first gas barrier layer 71 is fixed to the outer surface of the diaper, and the second gas barrier layer 72 is constituted. The sheet S2 is attached to the first sheet S1 so as to be peelable by the adhesive 73, and the second gas barrier layer 72 is peeled and removed to expose the adhesive 73 remaining on the surface of the first gas barrier layer 71 to the outer surface. It's also good. In such a form, since the exposed area of the adhesive 73 and the shape and arrangement of the odor countermeasure tape 70 can be freely designed, more desirable odor countermeasures can be performed. As shown in FIG. 15, the first gas barrier layer 71 and the second gas barrier layer 72 are formed by folding a belt-like body having gas barrier properties into two, and the first gas barrier layer 71 is composed of an adhesive 73 containing an odor control agent. In addition, the opposing surfaces of the second gas barrier layer 72 may be bonded together. In these forms, printing 77 such as characters and patterns can be applied to the outer surface of the second gas barrier layer 72. In this example, the pressure-sensitive adhesive 73 remains on the surface of the second gas barrier layer 72 and is exposed on the outer surface. However, the pressure-sensitive adhesive 73 may not remain in the second gas barrier layer 72.

The odor countermeasure tape 70 can be provided at an appropriate position of the absorbent article as long as the adhesive is exposed (not hidden) on the outer surface at the time of disposal. As shown in FIG. 9, it is generally provided in the back body B when it also serves as a post-treatment tape for a pants-type disposable diaper, but it may be provided in the front body F. It may be provided on both the front body F.

<Others>
Although the present invention can also be applied to a fastener tape in a tape-type disposable diaper, the fastener tape described in Patent Document 1 is not exposed to the outer surface at the time of disposal even if the adhesive for the target tape contains an odor control agent. The fastener tape is configured to have a portion exposed to the outer surface at the time of disposal, and in a product state, sandwiched between the first gas barrier layer and the second gas barrier layer, and the first gas barrier layer and the second gas barrier layer An odor control agent-containing pressure-sensitive adhesive is provided in the area between the two.

When using a fragrance | flavor as an odor countermeasure agent mixed with the adhesive 73, a fragrance | flavor can be provided also to a part or all of the absorber 56. FIG. Even if the perfume to be contained in the absorbent body 56 starts to be released immediately after production, or when it comes into contact with moisture of excrement such as urine, it is a scent, and the user has a strong scent. Since it may be uncomfortable or it may be difficult to know when to change the diaper due to the odor of excrement, it is preferable that the intensity of the scent is moderated at the initial stage of use. However, by itself, the scent is weak after excretion, and there is a possibility that a sufficient odor control effect cannot be obtained. In other words, the strength of the scent for the odor countermeasure in the absorbent article is not a strong scent depending on the use stage from the start of use to disposal, and a sufficient odor countermeasure effect cannot be obtained. On the other hand, when using a fragrance | flavor as an odor countermeasure agent mixed with the adhesive 73, when a fragrance | flavor is contained also in part or all of the absorber 56, strong fragrance before and after peeling operation of the odor countermeasure tape 70 is carried out. The thickness can be increased step by step, and odor countermeasures by the fragrance in the absorbent article can be made more preferable. For example, if the release of fragrance is started immediately after production, the scent is kept modest at the start of use, and the odor countermeasure tape 70 is peeled off at any subsequent stage, for example after excretion or disposal. By this, it is possible to strengthen the scent (odor countermeasure effect). In addition, when contact with moisture of excrement such as urine is triggered and becomes fragrant, it is in a state where there is no scent or is kept low at the start of use, and it is a measure to prevent odor of excrement during excretion Aroma is generated, and the odor (odor countermeasure effect) can be further strengthened by peeling off the odor countermeasure tape 70 at any subsequent stage, for example, at the time of disposal. Moreover, if both the fragrance | flavor to which the contact with the fragrance | flavor released immediately after manufacture and excrement are used as a trigger, a fragrance can be strengthened in three steps.

Although the fragrance | flavor provided to the absorber 56 is preferably a fragrance having the same scent as the fragrance contained in the pressure-sensitive adhesive 73, it may be a fragrance having a different scent. In any case, since the total amount of the fragrance diffused before and after the peeling operation of the odor countermeasure tape 70 is increased, the user feels that the scent has become stronger. Here, “addition” of a fragrance includes both external addition and internal addition (raw material addition). Further, the “fragrance having the same scent” includes both a fragrance having the same component and a fragrance having the same scent but different components. A fragrance with different ingredients but the same fragrance means a fragrance that a person feels to have the same fragrance. To give a more specific example, the fragrance has the same name (for example, a fragrance of lemon) If the components are different, they have the same fragrance), or simply different in volatility, different components other than the scent component such as a solvent, and the like. Furthermore, the fragrance | flavor determined with the same fragrance by the following fragrance evaluation tests irrespective of the difference in a component and a name is also contained in "the fragrance | flavor which has the same fragrance."
(Scent evaluation test)
Specimen: A specimen prepared by applying two kinds of fragrances to a filter paper having a width of 15 mm and a basis weight of 125 g / m ² so that the addition amount per area is the same as that of the odor control tape.
Subjects: 40 or more women aged 20 to 40 years old (age group preferably distributed evenly).
Test method: After passing the first specimen to the subject and confirming the scent for 10 seconds, the scent of the second specimen is confirmed at intervals of 30 seconds. The subject compares the scent of the first specimen and the second specimen, and the results are five choices: “exactly the same scent”, “substantially the same scent”, “don't know”, “a little different scent”, “a completely different scent” Choose one of the answers.
Determination: When the ratio of the number of subjects who answered “exactly the same scent” and the number of subjects who responded “substantially the same scent” is 80% or more of the total number of subjects, it is determined that they are “same scent”.

When the fragrance contained in the absorbent body 56 is fragranced using contact with moisture of excrement such as urine as a trigger, the fragrance component itself reacts with moisture to emit fragrance, and the fragrance is included in the inclusion material. It can be configured by things. Among these, it is preferable to enclose the fragrance in the inclusion substance because it prevents fragrance loss due to volatilization, and the fragrance is kept low before use and the fragrance is strongly generated from use to use. As the clathrate, one or more selected from the group of cyclodextrin, xanthan gum, guar gum and pectin can be used. In particular, cyclodextrin is preferable because it not only emits a scent but is also effective in adsorbing odor components of excreta. As the fragrance component itself that reacts with moisture to emit a scent, a water-soluble fragrance (essence) used in beverages obtained by dissolving and extracting a fragrance base with alcohol and water can be used.

When adding a fragrance | flavor to the absorber 56, it is preferable to prepare the fragrance | flavor containing solution which mixed the fragrance | flavor with water etc., and to spray this fragrance | flavor containing solution with a spray apparatus etc. At this time, a preservative may be added to the fragrance-containing solution in order to prevent the propagation of various germs in the tank of the fragrance-containing solution and to prevent the generation of mold due to an increase in the water content of the manufactured absorbent body 56. As an example of the composition of the fragrance-containing solution, water can be 86.9% by weight, α-cyclodextrin 10.3% by weight, fragrance 1% by weight, and preservative 1.8% by weight. About 0.4 to 0.8 g may be sprayed per 10 g of absorber weight.

When the fragrance-containing solution is added to the absorbent body 56, it can be performed at the same time as mixing the fiber assembly and the superabsorbent polymer particles, but it is sprayed after being molded as the absorbent body 56, or the fiber assembly is a pulp sheet. In the case of cotton-like pulp obtained by pulverizing and stacking, a method may be adopted in which it is contained by application or the like in the pulp sheet before pulverization.

In addition to or in addition to applying a fragrance to the absorbent body 56, even if it is applied to a constituent material other than the absorbent body 56, such as a nonwoven fabric, a film, an elastic member, a packaging sheet, or a printed sheet, It goes without saying that the same advantages as in the case of granting are brought about.

If the intensity of the odor emitted from the absorbent article itself can be reduced, the effect of the odor control agent of the present invention becomes more prominent. Therefore, make the superabsorbent polymer particles excellent in antibacterial and deodorant properties, add an antibacterial agent to the absorbent body 56 so that no odor is generated by decomposition of excrement by various bacteria, and other members It is preferable to use a material excellent in antibacterial and deodorant properties.

<Effect confirmation test>
As shown in Table 1, different pants-type disposable diapers such as the presence / absence of a fragrance and the use form of the fragrance were manufactured, and sensory evaluation was performed on the intensity of the fragrance under different conditions.

Example 1 uses a sample having the same structure as that shown in FIGS. 1 to 10, the post-processing tape has a wide width as shown in Table 1, and the pressure-sensitive adhesive for the post-processing tape. To which fragrance is added.

In Comparative Example 1, the width of the post-treatment tape was standardized, and the fragrance was evenly spread over the entire surface of the absorber without being included in the adhesive of the post-treatment tape, and the amount of fragrance used was increased accordingly. Except for the above, this example is the same as Example 1. In addition, Example 1 and Comparative Example 1 used the same fragrance | flavor.

Comparative Example 2 is the same as Comparative Example 1 except that no fragrance is used.

For each example, prepare the following pre-use sample (after 1 week of manufacture), post-use sample (after 1 week of manufacture), and post-use sample (after 1 month of manufacture), at a temperature of 25 ° C. and a relative humidity of 50%. The scent of each sample was confirmed by 30 subjects under the environment, and the scent strength was evaluated in five levels when the scent strength before use of Comparative Example 1 was 1.0 (0, 0. 5, 1.0, 1.5, 2.0), and the average value was used as the evaluation result.

Before use (after 1 week of manufacture): A sample stored in an environment of a temperature of 25 ° C. and a relative humidity of 50% for 1 week after manufacture in a state sealed with a vinyl package was used as a sample. A sample was taken out of the product package, placed in a plastic bag, and the scent was confirmed after 5 minutes.

After use (1 week after production): A sample stored in an environment of a temperature of 25 ° C. and a relative humidity of 50% for 1 week after production in a state sealed with a vinyl package was used as a sample. After absorbing 150 cc of ion-exchanged water in the sample absorber, the sample was rolled and stopped with a post-treatment tape, and then placed in a plastic bag, and the scent was confirmed after 5 minutes.

After use (1 month after manufacture): A sample stored in an environment with a temperature of 25 ° C. and a relative humidity of 50% for 1 month after manufacture in a state sealed with a vinyl package was used as a sample. After absorbing 150 cc of ion-exchanged water in the sample absorber, the sample was rolled and stopped with a post-treatment tape, and then placed in a plastic bag, and the scent was confirmed after 5 minutes.

The terms “before use” and “after use” in this test are assumed to be in a state before and after use of a pants-type disposable diaper. As described above, “before use” is an ion. It means an unused state in which the exchange water is not absorbed, and “after use” means a state in which the ion exchange water is absorbed instead of urine and then rolled and stopped with a post-treatment tape.

The test results are shown in Table 1. Example 1 according to the present invention has a result that the scent before use is suppressed and a sufficient scent can be felt after use, as compared with Comparative Example 1 in which a fragrance is dispersed on the absorber.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
The “front / rear (vertical) direction” means a direction connecting the ventral side (front side) and the back side (rear side), and the “width direction” means a direction (left / right direction) orthogonal to the front / rear direction.

・ "Elongation rate" means a value when the natural length is 100%.

・ "Gel strength" is measured as follows. 49.0 g of artificial urine (urea: 20 wt%, salt: 8 wt%, calcium chloride dihydrate: 0.3 wt%, magnesium oxide heptahydrate: 0.8 wt%, pure water: 70.01 wt%), Add 1.0 g of superabsorbent polymer and stir with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (I.techno Engineering: Curdmeter-MAX ME-500).

· “Weighing” is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.

“Thickness” is automatically measured using an automatic thickness meter (KES-G5 handy compression tester) under the conditions of load: 10 gf / cm ² and pressure area: 2 cm ² .

・ Water absorption is measured according to JIS K7223-1996 “Test method for water absorption of superabsorbent resin”.

-The water absorption rate is the "time to end point" when JIS K7224-1996 "Water absorption rate test method for superabsorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .

・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ± 5 ℃, relative humidity 65% or less). .

The present invention is suitable for a pants-type disposable diaper having a post-treatment tape as in the above example. It can be used.

DESCRIPTION OF SYMBOLS 11 ... Liquid impermeable sheet | seat, 12 ... Exterior body, 12A ... Side seal part, 12r ... Folded part, 25 ... Print sheet, 200 ... Interior body, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 DESCRIPTION OF SYMBOLS ... Absorber, 58 ... Packaging sheet, 60 ... Solid gather, 62 ... Gather sheet, 71 ... First gas barrier layer, 72 ... Second gas barrier layer, 73 ... Adhesive, 70 ... Odor control tape, S1 ... First sheet, S2 ... second sheet, S3 ... third sheet.

Claims (7)

1. A first gas barrier layer connected to the absorbent article, and a second gas barrier that is detachably attached to either one of the front and back surfaces of the first gas barrier layer with an adhesive containing an odor control agent. With odor control tape, including layers,
   The odor countermeasure tape is a measure for odor by peeling the second gas barrier layer from the first gas barrier layer and exposing the adhesive to the outer surface when the absorbent article is discarded.
   An absorbent article characterized by the above.
2. The absorbent article according to claim 1, further comprising fixing means for fixing the second gas barrier layer peeled from the first gas barrier layer to an outer surface of the absorbent article.
3. The absorbent article according to claim 1 or 2, wherein the odor control agent is mixed in the adhesive without being encapsulated in a microcapsule.
4. As an adhesive for releasably attaching the second gas barrier layer to the first gas barrier layer, an adhesive containing an odor control agent is applied in an elongated shape, and the odor is applied along both side edges extending in the longitudinal direction. The absorbent article according to any one of claims 1 to 3, wherein a pressure-sensitive adhesive containing no countermeasure agent is extended.
5. The odor countermeasure tape is a post-treatment tape used to fix the absorbent article in a rolled state,
   The post-treatment tape has a structure in which a plurality of strips having gas barrier properties are folded back in the longitudinal direction to form a folded state in which a plurality of layers are laminated, and adjacent layers are bonded together with an adhesive. And
   In a state where the post-treatment tape is expanded from the folded state, either one of the front and back surfaces is a surface having an adhesive that fixes the rolled state, and the opposite surface has an adhesive containing the odor control agent. The surface,
   The absorbent article according to any one of claims 1 to 4.
6. The absorbent article according to any one of claims 1 to 4, wherein the odor countermeasure tape is dedicated to odor countermeasures.
7. The odor control agent according to any one of claims 1 to 6, wherein the odor control agent contains a fragrance, and the fragrance is added to at least a part of the constituent material other than the odor control tape in the absorbent article. Absorbent article.

Images