WO2012043077A1

WO2012043077A1 - Disposable wearable article

Info

Publication number: WO2012043077A1
Application number: PCT/JP2011/068348
Authority: WO
Inventors: 知央金子; 山中　康弘; 島田　孝明; 大橋　直人
Original assignee: ユニ・チャーム株式会社
Priority date: 2010-09-29
Filing date: 2011-08-11
Publication date: 2012-04-05
Also published as: JP2012071063A; JP5769398B2; TW201225937A

Abstract

Provided is a disposable diaper: that can be fitted to the body of a wearer with relative ease by bending a front waist region of the main diaper body firmly to the outside; and the bent locations of which do not curl when the diaper is worn. An absorbent core (22) has a bending guide section (24) that extends in the direction of the horizontal axis (Q) in the front waist region (11), and elastic side regions (43), which can expand and contract along both sides (30, 31), are formed on both sides (30, 31) of a crotch region (13). Low elasticity sections (46) having a low contraction rate compared to the other locations (highly elastic sections) (47), which extend toward the rear waist region (12) from the vicinity of the rear edge (24a) of the bending guide section (24), are formed on the elastic side regions (43).

Description

Disposable wearing items

The present invention relates to a disposable wearing article, and more particularly to an open type disposable wearing article such as an open-type disposable diaper, disposable toilet / training pants, disposable incontinence pants, disposable sanitary pants mainly for newborns. .

Conventionally, disposable wearing articles for newborns are known. For example, Patent Document 1 includes a liquid-permeable top sheet, a liquid-impervious back sheet, a liquid-absorbent core interposed between the front and back sheets, a pair of wearing bands extending in the direction around the waist, A disposable diaper including a plurality of elastic members extending from both sides of the crotch region to the front and rear waist regions is disclosed.

Japanese Patent No. 3343199

The disposable diaper disclosed in Patent Document 1 is a diaper formed at a predetermined portion in the front end portion of the diaper main body, where the liquid absorbent core is thinner than the adjacent portion or no absorbent liquid core is present. A bending guide portion extending in the lateral direction is provided.

By folding the front end of the diaper body outward along the upper edge of the bending guide and the wearing band, the navel of the newborn baby who is the wearer can be exposed, and the abdominal breathing is not hindered. Further, since the folded portion can be fixed to the diaper main body by the fastening means located on the outer surface of the front end portion, the navel of the newborn can be reliably exposed. Further, the plurality of elastic members extending from both side portions of the waist region to the front and rear waist regions can fit the region around the wearer's leg.

However, since the front end of the diaper main body is bent outward along the upper edge of the folding guide and the wearing band after being fastened by the wearing band, the navel is positioned near or below the folding guide. If this is the case, it is necessary to adjust the position of the diaper by removing the wearing band. Moreover, in order to prevent the part bent outside, the means for fixing this bending part other than a wearing band is required, and fixing operation is troublesome. Further, when the wearing band is fastened, due to the contraction force of the multiple elastic members extending to the vicinity of the bent portion, the lower region and the entire crotch region from the bent portion in the front waist region downward, that is, Since the bent part has a curved shape as it is pulled toward the rear waist region, the wearing position may be shifted, and the leg opening edge of the diaper main body may be worn in a state that does not fit the wearer's leg sufficiently. is there.

An object of the present invention is an improvement of the conventional invention, and can be fitted to the wearer's body by bending the front waist region of the diaper body to the outside by a relatively simple operation, and at the time of wearing. The present invention provides a disposable wearing article including a disposable diaper in which a bent part is not curved.

This invention for solving the said subject has a vertical axis | shaft and a horizontal axis | shaft, a skin opposing surface and the non-skin opposing surface which opposes this, a front waist area, a back waist area, and the said front-back waist area A diaper main body having a crotch region extending in the direction of the longitudinal axis between the crotch region and an absorbent core extending in the front-rear direction from the crotch region, and a fastening system for connecting both side edges of the front-rear waist region to each other. It relates to the improvement of disposable wearing articles.

The features of the present invention are as follows. That is, the said absorptive core has the bending guide part extended in the direction of the said horizontal axis in the said front waist area. Side elastic regions that can expand and contract along the both side portions are formed on both side portions of the crotch region. In the side elastic region, a low elastic portion having a lower shrinkage rate than other portions extending from the vicinity of the rear end edge of the bending guide portion toward the rear waist region is formed.

As one embodiment of the present invention, a folding line formed by bending the folding guide portion toward the non-skin facing surface or the skin facing surface of the crotch region is substantially parallel to the horizontal axis. It extends straight.

As another embodiment of the present invention, the side elastic region includes a plurality of first elastic elements extending in the direction of the vertical axis in the crotch region, and the longitudinal elastic member in parallel with the first elastic element. A plurality of second elastic elements extending in the direction of the shaft are arranged, and only the first elastic element of the first and second elastic elements is arranged in the low elastic portion.

As another embodiment of the present invention, a plurality of elastic elements extending in the direction of the longitudinal axis are arranged in the side elastic region, and the absorbent core is located in the vicinity of the bending guide portion. It has an overhanging part extending in the direction of the horizontal axis, and the rigidity of the overhanging part is higher than the rigidity of the other part of the absorbent core, and in the vicinity of the overhanging part of the elastic element The low-elasticity part is formed in a portion located at the position.

As another embodiment of the present invention, a plurality of elastic elements extending in the direction of the longitudinal axis are arranged in the side elastic region, and a portion of the elastic element located on the front waist region side The low elastic portion is formed by intermittently providing an embossed portion in the longitudinal axis direction.

As another embodiment of the present invention, a plurality of elastic elements extending in the direction of the longitudinal axis are arranged in the side elastic region, and are located on the front waist region side of the elastic elements. The low-elasticity part is formed by providing a fixed part formed by applying an adhesive in a planar shape to the part.

As another embodiment of the present invention, the fastening system includes a first fastening element provided on the skin facing surface of a pair of tape fastener tabs extending from both side edges of the rear waist region in the direction of the horizontal axis. And a first fastening system composed of a second fastening element located on the non-skin facing surface side of the front waist region, and a position on the skin facing surface of the pair of first fastening elements and the front waist region And a second fastening system having a third fastening element.

As another embodiment of the present invention, the fastening system includes a first fastening element provided on the skin facing surface of a pair of tape fastener tabs extending from both side edges of the rear waist region in the direction of the horizontal axis. And a first fastening system composed of a second fastening element located on the non-skin facing surface side of the front waist region, and the non-skin facing surface of the pair of first fastening elements and the front waist region And a second fastening system having a third fastening element located below the second fastening element.

As another embodiment of the present invention, in the side elastic region, the shrinkage rate of the low elastic portion is about 70 to 75%, and the shrinkage rate of the high elastic portion formed from a portion other than the low elastic portion is , About 50-60%.

According to the disposable wearing article according to the present invention, in the side elastic region of both side portions of the diaper main body, the shrinkage rate is reduced as compared with other portions extending from the vicinity of the rear end edge of the bending guide portion toward the horizontal axis. A low low elasticity part is formed. As a result, when the diaper is mounted, the bent portion formed along the bending guide portion is not curved and forms a straight shape, so that the mounting position of the diaper main body does not shift and alignment is relatively easy. You can put on a diaper in the

The perspective view of the disposable diaper as an example of the disposable wearing article in 1st Embodiment of this invention. The partially broken expansion | deployment top view seen from the inner surface of the state which extended the diaper in the front-back direction. FIG. 3 is a sectional view taken along line III-III in FIG. 1. The perspective view in the other wearing condition of a diaper. The partially broken expansion | deployment top view similar to FIG. 2 in the state which bent some diapers. The perspective view which shows the mode at the time of making a diaper wear. The expansion | deployment top view similar to FIG. 2 in 2nd Embodiment of this invention. The expansion | deployment top view similar to FIG. 2 in 3rd Embodiment of this invention. The expansion | deployment top view similar to FIG. 2 in 4th Embodiment of this invention. The perspective view of the diaper in 5th Embodiment of this invention. The perspective view of the diaper in 5th Embodiment of this invention. The expansion | deployment top view similar to FIG. 2 of the diaper in 5th Embodiment of this invention.

<First Embodiment>
As shown in FIGS. 1 and 2, the disposable diaper 10 has a vertical axis P and a horizontal axis Q, a skin contact surface side and a non-skin contact surface side opposite thereto, a front waist region 11, and a rear waist region. 12, a pair of diapers body 14 having a crotch region 13 positioned between the front and

rear waist regions

11 and 12, and a pair of diaper body 14 extending from the both

side edges

12a and 12b of the rear waist region 12 outward in the direction of the horizontal axis Q.

Tape fastener tabs

15 and 16. On the skin facing surfaces of the

tape fastener tabs

15 and 16, a first fastening element 17 formed from a hook group of mechanical fasteners is disposed. The outer surface of the front waist region 11 is formed of a loop group of mechanical fasteners extending in the direction of the horizontal axis Q for removably fixing the first fastening elements 17 of the

tape fastener tabs

15 and 16. A second fastening element 18 is attached via a hot melt adhesive (not shown).

As shown in FIGS. 1 to 4, the diaper main body 14 is formed of a fiber nonwoven fabric, a porous plastic film, a laminate sheet thereof, and the like, and has a liquid-permeable top sheet 20 positioned on the skin contact surface side, and an outer shape of the diaper 10. A liquid-permeable back sheet 21 formed of a moisture-permeable plastic film, a fiber nonwoven fabric, or a laminate sheet thereof, and located on the non-skin contact surface side, and a mixture of flap pulp and superabsorbent polymer particles Etc., and includes an absorbent core 22 interposed between the top sheet 20 and the back sheet 21. The top sheet 20 and the back sheet 21 extend from the peripheral edge of the absorbent core 22 and are applied to the inner surface of at least one of the

sheets

20 and 21 at the extended portion. (Not shown) are joined together. Moreover, although the absorptive core 22 is not illustrated, it may be encapsulated by a diffusion sheet such as tissue paper.

The top sheet 20 has a mass of 15 to 50 g / m ² , preferably 20 to 35 g / m ² , and a fiber density of 0.01 to 0.04 g / cm ³ , preferably 0.025 to 0.035 g / cm ³ . ³ is formed from an air-through fiber nonwoven fabric or a spunbond fiber nonwoven fabric. The backsheet 21 has a mass of 10 to 40 g / m ² , preferably 15 to 30 g / m ² , and a fiber density of 0.06 to 0.1 g / cm ³ , preferably 0.07 to 0.09 g. It is formed from a spunbonded nonwoven fabric having a / cm ³ range.

The absorbent core 22 has front and

rear end edges

22a, 22b and both

side edges

22c, 22d extending in the direction of the vertical axis P between them. Further, the absorbent core 22 is formed with a bending guide portion 24 extending in the direction of the horizontal axis Q in the front waist region 11. The bending guide part 24 is a concave groove formed by making the absorbent core 22 thinner than other parts. Since the bending guide part 24 is formed in the absorptive core 22, the front waist region 11 can be bent outside via the bending guide part 24 so that it may mention later.

The bending guide portion 24 is a concave groove having a width of a required dimension in the direction of the vertical axis P, and the separation dimension between the front edge 24a and the rear edge 24b, that is, the length dimension in the direction of the vertical axis P. L1 is preferably 1.0 to 15.0 mm, more preferably 5.0 to 10.0 mm in order to have the effects of the present invention described later. The bending guide part 24 is formed at a position overlapping the lower edge 18a of the second fastening element 18 located on the outer surface of the diaper body 14, and corresponds to the bending guide part 24 on the outer surface of the diaper body 14, In other words, a bending guide line 25 is formed on the lower edge 18a of the second fastening element 18 and in the vicinity thereof so that the position of the bending guide portion 24 can be confirmed when the diaper 10 is viewed from the outside. The bending guide line 25 may be formed by applying a color different from that of the second fastening element 18 so that the wearer and the wear assistant can easily visually recognize the position of the bending guide portion 24, or a tape. You may form by sticking a piece.

As shown in FIG. 3, the bending guide portion 24 is a concave groove formed by making the skin contact surface of the absorbent core 22 concave, but the non-skin contact surface of the absorbent core 22 is concave. May be formed. Moreover, the bending guide part 24 may be formed by removing a part of the absorbent core 22 or may be formed by compressing and deforming the absorbent core 22 at the site. Furthermore, in the bending guide part 24, you may form by making the thickness of the absorptive core 22 the same thickness as another site | part, and making the density low compared with another site | part.

Between the top sheet 20 and the back sheet 21, a leak-proof sheet 26 formed from a liquid-impervious and moisture-permeable plastic film is disposed, and the inner surface of either one of the

sheets

20, 21 is disposed. It is fixed via a hot melt adhesive (not shown) applied to the surface. A pair of barrier sheets 27 symmetrical with respect to the vertical axis P are attached to the outer side of the absorbent core 22 in the lateral direction X on the skin facing surface of the diaper 10.

The diaper main body 14 extends in the direction of the vertical axis P in the crotch region 13 in opposition to the front and

rear end portions

28 and 29 extending in the direction of the horizontal axis Q facing the direction of the vertical axis P. Furthermore, both

side parts

30 and 31 are included. When the diaper 10 is worn, by engaging the first fastening element 17 of the pair of

tape fastener tabs

15 and 16 and the second fastening element 18 located on the outer surface of the front waist region 11, the waist opening 33 and the pair of pair A leg opening 34 is defined (see FIG. 1).

The front and

rear end portions

28 and 29 include a top sheet 20, a leak-proof sheet 26, a back sheet 21, and a barrier sheet 27 that extend outward from the front and rear end edges of the absorbent core 22 in the direction of the vertical axis P. It is formed by overlapping each other. The

side portions

30 and 31 include a top sheet 20, a leak-proof sheet 26, a back sheet 21, and a barrier sheet 27 that extend outward from both side edges of the absorbent core 22 in the direction of the horizontal axis Q. It is formed by overlapping each other. Further, the back sheet 21 and the barrier sheet 27 are further outward in the direction of the horizontal axis Q from both side edges of the top sheet 20 and the leak-proof sheet 26 that form both

side portions

30 and 31 in the front and

rear waist regions

11 and 12. Front and rear side flaps 35 and 36 are formed. Fixing

portions

15 a and 16 a of a pair of

tape fastener tabs

15 and 16 are interposed between both side edges of the back sheet 21 and the barrier sheet 27 that form the rear side flap 36. It is fixed via a hot melt adhesive (not shown) applied to the inner surface. The

free portions

15b and 16b of the

tape fastener tabs

15 and 16 extending outward in the direction of the horizontal axis Q from the side edges of the rear side flap 36 (side edges 12a and 12b of the rear waist region 12) Fastening elements 17 are provided.

The barrier sheet 27 includes a proximal edge portion 37 that forms part of both

side portions

30 and 31, and a front and rear fixed end portion 38 that is fixed to the skin facing surfaces of the top sheet 20 and the backsheet 21 in the front and

rear waist regions

11 and 12. , 39 and a distal edge 40 formed by folding the inner edge of the barrier sheet 27 inwardly extending in the direction of the longitudinal axis P between the front and rear fixed ends 38, 39. A plurality of strand-like or string-like first and second

elastic elements

41, 42 extending in the direction of the longitudinal axis P are disposed on the proximal side of the barrier sheet 27 on the outer side in the lateral direction X of both side edges of the leak-proof sheet 26. Between the edge part 37 and the both sides of the back seat | sheet 21, it is attached so that shrinkage | contraction is possible via a hot-melt-adhesive (not shown). Further, two strand-like or string-like cuff elastic elements 44 extending in the direction of the longitudinal axis P are disposed on the distal edge portion 40 so as to be contractible. When the diaper 10 is worn, the distal edge portion 40 is separated from the skin-facing surface of the top sheet 20 by the contraction action of the cuff elastic element 44, and a pair of leak-proof cuffs 45 for preventing lateral leakage of excrement are provided. It is formed.

On both

side portions

30 and 31 of the diaper main body 14, side elastic regions 43 that are elastically extendable in at least the direction of the longitudinal axis P and in which the first and second

elastic elements

41 and 42 are disposed are formed. . The first elastic element 41 is composed of two elastic yarns extending in the direction of the vertical axis P in the entire crotch region 13, and the second elastic element 42 is located between the first elastic elements 41. In parallel with them, it is composed of two elastic yarns extending from the rear waist region 12 side of the crotch region 13 to the front waist region 11 side of the horizontal axis Q. Further, the side elastic region 43 includes a low elastic portion 46 having a low shrinkage rate and elongation stress as compared with other portions where only the first elastic element 41 is disposed, and the first and second

elastic elements

41 and 42. And the other part (high elastic part 47) where the is disposed.

A first fastening element 17 is engageable with the skin facing surface of the top sheet 20 at the front end 28, and a third fastening element 48 formed by embossing the top sheet 20 is provided. ing. The third fastening element 48 includes a plurality of first and second concave lines 49 and 50 that extend obliquely with respect to the vertical axis P and the horizontal axis Q and intersect in a lattice pattern. The shape and size of the lines 49 and 50, the crossing angle with each other, and the like can be freely selected as appropriate. As long as the required fastening strength with the first fastening element 17 is provided, the third fastening element 48 is an air-through nonwoven fabric or a spunbond nonwoven fabric that is normally used for this kind of article that has not been embossed. It may be formed by a part of the top sheet made of the like.

The diaper 10 having such a configuration has a front waist region 11 along the folding guide portion 24 as shown in FIG. 4 in addition to the first fastening system including the first fastening element 17 and the second fastening element 18. The front waist region 11 is turned into the non-skin facing surface of the crotch region 13 by bending the first fastening element 17 to the third fastening element 48 formed on the skin facing surface of the front end portion 28 by bending outward. And a second fastening system for wearing the diaper 10 in a folded state. When wearing the diaper 10 by the second fastening system, the abdomen of the wearer is exposed, so that when the wearer is a newborn baby including a premature baby, the abdominal breathing is hindered by tightening by the front waist region 11 There is no. In particular, in the case of a newborn baby, the navel and its surroundings are not sufficiently matured, and there is a possibility that even a slight tightening by the front waist region 11 may cause irritation, but such a situation can be avoided.

In the first fastening system comprising the first fastening element 17 and the second fastening element 18, if it has a required peel strength, the first fastening element 17 is replaced with a hook group and an adhesive is applied. May be formed. In this case, in order to protect the first fastening element 17, the surface of the first fastening element 17 may be covered with a separator coated with silicon.

The

tape fastener tabs

15 and 16 are preferably formed from a sheet material having relatively high rigidity and tensile strength, such as a plastic film, a fiber nonwoven fabric, a laminate thereof, or craft paper. Further, the first fastening element 17 provided on the rear side flap 36 can be directly detached from the second fastening element 18 without using the

tape fastener tabs

15 and 16 as long as the required effects of the present invention are obtained. You may engage.

FIG. 5 is a developed plan view in a state where the front waist region 11 is bent toward the outside of the diaper 10 along the bending guide portion 24, and FIG. 6 is a state when the diaper 10 is worn by the second fastening system. FIG. In FIG. 5, for convenience of explanation, the barrier sheet 27 is removed, and the first and second

elastic elements

41 and 42 are indicated by solid lines.

As shown in FIG. 5, when the front waist region 11 is bent toward the outside of the diaper 10 along the bending guide portion 24, in the present invention, the side elastic region 43 includes the low elastic portion 46 and the high elastic portion 47. The folding line 52 extending in the direction of the horizontal axis Q at the substantially central portion of the bending guide portion 24 facing the wearer's abdomen without having a curved shape, is divided into the horizontal axis of the diaper 10. It extends so as to be substantially parallel to Q.

That is, the first and second

elastic elements

41 and 42 require a required extension force to fit the leg opening edge of the diaper 10 around the leg of the wearer, and the entire side elastic region 43 is uniform and given. In the case of having the contraction rate, the both

side portions

30 and 31 in the crotch region 13 in the vicinity of the bending guide portion 24 are pulled backward by the contracting action, and the bending line 52 may be curved. In such a case, the front end edge (bending line 52) that contacts the lower abdomen of the wearer is curved, so that it is easy to cause a position shift during wearing, and wrinkles are generated on both

side portions

30 and 31, and the portion There is a risk of excretion leaking from.

However, in the case of the present embodiment, in the side elastic region 43, the low elastic part 46 having a relatively low shrinkage rate is formed in the vicinity of the bending guide part 24, so that the vicinity of the bending guide part 24 is formed. The region is not pulled backward by the contraction force of the first and second

elastic elements

41, 42. Therefore, as described above, the bending line 52 does not exhibit a curved shape, and extends substantially parallel to the horizontal axis Q along the bending guide portion 24. The position does not shift.

Further, when the bent line 52 has a curved shape, it is necessary for the wear assistant to hold both sides with both hands and pull it in the direction of the horizontal axis Q in order to prevent the disadvantage. However, it is not easy for the wearing assistant alone to fasten the first fastening element 17 to the third fastening element 48 while maintaining the state in which the bending line 52 is extended in the direction of the horizontal axis Q. Absent.

In the present embodiment, as shown in FIG. 6, the folding line 52 extends substantially parallel to the horizontal axis Q, so there is no need to pull the folding line 52 from both sides in the direction of the horizontal axis Q, and the bending guide section After being bent through 24, the first fastening element 17 can be fixed to the third fastening element 48 as it is at the mounting position that has been previously positioned.

In the present embodiment, the length dimension L3 in the longitudinal direction Y of the low elastic portion 46 is about 60 mm when the length dimension L2 in the longitudinal direction Y of the front waist region 11 is about 60 mm, although it depends on the overall size of the diaper 10. Similarly, it is preferably about 60 mm. When the length dimensions L2 and L3 of the front waist region 11 and the low elastic portion 46 are substantially the same, the expansion and contraction force of the high elastic portion 47 does not act on the front waist region 11 in a bent state. This is because those portions superimposed in the front-rear direction are not likely to be pulled backward by the stretching force of the second elastic member 42. In such a case, the length L4 in the longitudinal direction Y of the high elastic portion 47 is about 140 mm, and the both side edges 22c and 22d of the absorbent core 22 in the low elastic portion 46 and the innermost side of the first elastic element 41. The separation dimension W in the direction of the horizontal axis Q from the elastic member 53 is preferably about 25 mm. The absorbent core 22 has higher rigidity (so-called semi-rigidity) than the sheet member forming the diaper main body 14, and when the

elastic elements

41 and 42 are close to the absorbent core 22, This is because the expansion / contraction force is suppressed and the required expansion / contraction force may not be applied.

Further, as the first and second

elastic elements

41 and 42, conventionally known ones used in articles of this type can be appropriately selected and used. For example, for the first elastic element 41, , An elastic yarn having a thickness of about 450 to 950 dtex, and preferably an expansion ratio of about 2.2 times, and the second elastic element 42 has an elastic yarn having a thickness of about 450 to 950 dtex and an extension ratio of about 1.9 times. Can be formed. Specifically, in this embodiment, when an elastic yarn having a thickness of about 470 dtex is used as the first and second

elastic elements

41 and 42, the shrinkage rate of the low elastic portion 46 is 70 to 75%, The shrinkage rate of the highly elastic portion 47 is 50 to 60%. In this case, the low elastic portion 46 has a lower fit than the elastic element provided at the leg opening edge that is normally used, but the high elastic portion 47 has a relatively high elongation stress, The extension stress of the entire elastic region 43 has the extension stress of the leg opening edge that is usually used in this type of diaper, so there is no possibility that excrement will leak sideways.

<Measurement method of shrinkage ratio of low elastic part and high elastic part>
First, when the diaper 10 is worn (the first and second

elastic elements

41 and 42 are contracted), the foremost end S of the first elastic element 41 in the low elastic part 46, the low elastic part 46, and the high elastic part. 47, ie, a portion T located in the vicinity of the end 42a of the second elastic element 42 and a rearmost end U of the first and second

elastic elements

41, 42 in the high elastic portion 47. Mark each one. Next, the length dimension in the direction of the vertical axis P between the foremost end S and the part T located at the boundary, and the length dimension in the direction of the vertical axis P between the part T and the rearmost end U Measured to be a length dimension N1 when the low elastic portion 46 is contracted and a length dimension N2 when the high elastic portion 47 is contracted.

Next, in the state where the diaper 10 is expanded (the state where the first and second

elastic elements

41 and 42 are extended), similarly, the length dimension of the vertical axis P between the foremost end S and the region T, The length dimension in the direction of the vertical axis P between the portion T and the rearmost end U is measured, and the length dimension N3 when the low elastic portion 46 is elongated and the length when the high elastic portion 47 is elongated. The dimension is N4. The values measured by these measurement methods are respectively expressed as the shrinkage rate of the low elastic portion 46 = the length dimension N1 when the low elastic portion 46 is contracted / the length dimension N3 × 100 (%) when the low elastic portion 46 is extended. The shrinkage ratio of the high elastic portion 47 = the length dimension N2 when the high elastic portion 47 is contracted ÷ the length dimension when the high elastic portion 47 is extended N4 × 100 (%). Was defined as the shrinkage ratio of the low elastic portion 46 and the high elastic portion 47.

Second Embodiment
FIG. 7 is a longitudinal sectional view similar to FIG. 2, showing a second embodiment of the present invention. Since the basic aspect of the diaper 10 in 2nd Embodiment is the same as that of 1st Embodiment, only a different point is demonstrated below. In FIG. 7, for convenience of explanation, the barrier sheet 27 is removed, and the first elastic element 41 is indicated by a solid line.

In the present embodiment, only the two first elastic elements 41 are disposed in the side elastic regions 43 of the both

side portions

30 and 31 of the diaper main body 14, respectively. Further, a part of the absorbent core 22 on the front waist region 11 side of the crotch region 13 is wider in the direction of the horizontal axis Q than that of the first embodiment and extends outward in the direction of the horizontal axis Q. A pair of projecting portions 55 are formed. The overhang portion 55 of the absorbent core 22 has higher rigidity than other portions of the absorbent core 22, and the end portion of the overhang portion 55 and the innermost elastic element 53 of the first elastic element 41. The separation dimension W2 in the direction of the horizontal axis Q with respect to 53a is about 5.0 mm.

Thus, the first elastic element 41 is disposed in the entire area of both

side portions

30 and 31 of the crotch region 13, and basically the side elastic region 43 has a uniform contraction rate and elongation stress. However, in the region near the overhang 55 of the absorbent core 22, the first elastic element 41 is close to the overhang 55 and the overhang 55 has a relatively high rigidity. The contraction force by the elastic element 41 is suppressed, and the side elastic region 43 is formed with a low elastic portion 46 having a contraction rate and an elongation stress lower than those of other portions. Therefore, since the side elastic region 43 is divided into the low elastic part 46 and the high elastic part 47 having a higher shrinkage rate and expansion / contraction stress than the low elastic part 46, the same effect as that of the first embodiment is achieved, and the absorbent core 22 is also provided. By having the overhang part 55, the absorption area of the whole liquid-absorbent core 22 increases, and the bodily fluid absorption performance improves.

<Third Embodiment>
FIG. 8 is an exploded plan view similar to FIG. 2 of the diaper 10 in the third embodiment of the present invention. Since the basic aspect of the diaper 10 in 3rd Embodiment is the same as that of 1st Embodiment, only a different point is demonstrated below. In FIG. 8, for convenience of explanation, the barrier sheet 27 is removed, and the first and second

elastic elements

41 and 42 are indicated by solid lines.

In the present embodiment, as in the second embodiment, only two first elastic elements 41 are disposed on both

side portions

30, 31 of the diaper main body 14, respectively. As described above, since the first elastic element 41 is arranged, the side elastic region 43 basically has a uniform shrinkage rate and elongation stress, but a part of the first elastic element 41, that is, By embossing the portion of the absorbent core 22 on the bending guide portion 24 side, the stretchability is hindered, and the low elastic portion 46 is formed. That is, in the low elastic portion 46, the stretchability is hindered in the plurality of embossed portions 57 arranged intermittently in the longitudinal direction Y, and the low elastic portion 46 expands and contracts only at the portion 59 between the embossed portions 57. Sex is expressed. Thereby, the low elastic part 46 and the high elastic part 47 whose shrinkage rate and elongation stress are higher than it are formed in the both

side parts

30 and 31 of the diaper main body 14. FIG. In the present embodiment, each embossed portion 57 is formed so as to intersect with the plurality of elastic elements forming the first elastic element 41 in the direction of the horizontal axis Q, but the low elastic portion 46 as a whole is required. As long as the shrinkage rate and the extensional stress can be reduced, only the innermost elastic element 53 of the elastic elements forming the first elastic element 41 is embossed, and the outermost elastic element 58 is embossed. It is not necessary to apply. In this case, when the diaper 10 is worn by the first fastening system, the outer edge of the low-elasticity portion 46 is in close contact with the wearer's skin, and there is a risk that wrinkles that induce excretion leakage may occur at the site. Absent.

<Fourth embodiment>
FIG. 9 is an expanded plan view similar to FIG. 2 of the diaper 10 in the fourth embodiment of the present invention. Since the basic configuration of the diaper 10 in the third embodiment is the same as that of the first embodiment, only differences will be described below. In FIG. 9, for convenience of explanation, the barrier sheet 27 is removed, and the first and second

elastic elements

41 and 42 are indicated by solid lines.

In the present embodiment, as in the second and third embodiments, only the two first elastic elements 41 are disposed on both

side portions

30, 31 of the diaper main body 14, respectively. As described above, since only the first elastic element 41 is disposed, the side elastic regions 43 in the

side portions

30 and 31 basically have a uniform contraction rate and elongation stress. The low-elasticity part 46 is formed by applying an adhesive to a part of the elastic element 41, that is, a part of the absorbent core 22 on the bending guide part 24 side by a coater coating. Specifically, a fixing portion 60 made of an adhesive applied in a planar shape is formed in the low elastic portion 46, and the expression of stretchability by the first elastic element 41 at this portion is inhibited. Therefore, the side elastic region 43 is divided into a low elastic portion 46 and a high elastic portion 47 having a high shrinkage rate and high elongation stress. The area and the like of the fixing portion 60 can be appropriately set according to the minimum elongation ratio and elongation stress required for the low elastic portion 46, and the basis weight is 5.0 to 15.0 gms. The length dimension W3 in the direction of the axis Q is preferably 10 to 20 mm.

<Fifth Embodiment>
FIG. 10 is a perspective view of the diaper 10 according to the fifth embodiment of the present invention, FIG. 11 is a perspective view showing a wearing state of the diaper 10 according to the fifth embodiment, and FIG. 12 is a development of the diaper 10 according to the fifth embodiment. It is a top view. Since the basic configuration of the diaper 10 in the fifth embodiment is the same as that of the first embodiment, only differences will be described below.

As shown in FIG. 10, the diaper 10 according to this embodiment is provided with a second fastening element 18 and a third fastening element 48 to which the first fastening element 17 is fastened on the outer surface of the front waist region 11 of the diaper 10. ing. The third fastening element 48 is located below the second fastening element 18 with the bending guide display unit 25 interposed therebetween, and has the same configuration as the second fastening element 18.

As shown in FIGS. 11 and 12, the front waist region 11 of the diaper 10 of the present embodiment is divided into an upper region 11 </ b> A located above the bending guide portion 24 and a lower region 11 </ b> B located below the upper region 11 </ b> B. The first fastening of the

tape fastening tabs

15 and 16 is performed by bending the upper region 11A of the front waist region 11 inward toward the skin facing surface of the lower region 11B along the bending guide portion 24. By fastening the element 17 to the third fastening element 48, the diaper 10 can be worn while a part of the front waist region 11 is bent inside. Therefore, also in the present embodiment, the first fastening system of the diaper 10 including the first fastening element 17 and the second fastening element 18 shown in FIG. 10 and the first fastening element 17 and the first fastening element shown in FIG. The 2nd fastening system of the diaper 10 comprised from the 3 fastening elements 70 can be used selectively, and the size adjustment of the diaper 10 can be performed easily.

Thus, even if it is a case where a part of the front waist region 11 is folded back and worn, the region near the folding guide portion 24 on both

side portions

30 and 31 of the diaper 10 is more than the other portions, that is, Since the low elastic portion 46 having a lower shrinkage rate than the high elastic portion 47 is formed, the bent line 52 is not curved, and the same effect as in the first embodiment can be obtained.

The diaper 10 of the present invention relates to a disposable wearing article that can be easily changed in size among a plurality of sizes such as normal S, M, and L sizes for infants as well as for newborns. In addition to the materials described in this specification, various known materials that are usually used in this type of field can be used for each component of the diaper 10 without limitation. Further, in the specification and claims of the present invention, the terms “first” and “second” are merely used to distinguish similar elements, positions, and the like.

10 Disposable diapers (disposable wearing articles)
11 front waist region 12 rear waist region 13 crotch region 14

diaper body

15, 16 tape fastener tab 17 first fastening element 18 second fastening element 24 bending guide part 41 first elastic element 42 second elastic element 43 side elastic area 46 Low elastic portion 47 High elastic portion 48 Third fastening element 52 Bending portion 55 Overhang portion 60 Fixed region P Vertical axis Q Horizontal axis

Claims

Having a vertical axis and a horizontal axis, a skin facing surface and a non-skin facing surface facing the skin,
A diaper body having a front waist region, a rear waist region, a crotch region extending in the direction of the longitudinal axis between the front and rear waist regions, and an absorbent core extending in the front and rear direction from the crotch region, and the front and rear waist regions A disposable wearing article comprising a fastening system for connecting both side edges of each other,
The absorbent core has a bending guide portion extending in the direction of the horizontal axis in the front waist region,
On both sides of the crotch region, side elastic regions are formed that can expand and contract along the both sides,
The side elastic region is formed with a low elastic portion having a lower shrinkage rate than other portions extending from the vicinity of the rear end edge of the bending guide portion toward the rear waist region. The worn article.
2. A bending line formed by bending the bending guide portion toward a non-skin facing surface or a skin facing surface of the crotch region extends in a straight line so as to be substantially parallel to the horizontal axis. The wearing article as described.
The side elastic region includes a plurality of first elastic elements extending in the direction of the vertical axis in the crotch region, and a plurality of second elastic elements extending in the direction of the vertical axis in parallel with the first elastic element. The wearing article according to claim 1 or 2, wherein only the first elastic element of the first and second elastic elements is arranged in the low elastic part.
A plurality of elastic elements extending in the direction of the vertical axis are arranged in the side elastic region, and the absorbent core has a protruding portion extending in the direction of the horizontal axis in the vicinity of the bending guide portion. The rigidity of the overhanging portion is higher than the rigidity of the other portion of the absorbent core, and the low elastic portion is formed in a portion of the elastic element located in the vicinity of the overhanging portion. The wearing article according to claim 1 or 2.
A plurality of elastic elements extending in the direction of the vertical axis are arranged in the side elastic region, and an embossed portion is intermittently provided in the vertical direction in a portion of the elastic element located on the front waist region side. The wearing article according to claim 1, wherein the low-elasticity portion is formed by providing the same.
A plurality of elastic elements extending in the direction of the longitudinal axis are disposed in the side elastic region, and an adhesive is applied in a planar shape to a portion of the elastic element located on the front waist region side. The wearing article according to claim 1, wherein the low elastic portion is formed by providing a fixing portion.
The fastening system includes a first fastening element provided on the skin facing surface of a pair of tape fastener tabs extending from both side edges of the rear waist region in the direction of the horizontal axis, and the non-skin facing surface of the front waist region. The 2nd fastening system which has the 1st fastening system comprised from the 2nd fastening element located in the side, The 3rd fastening element located in the skin facing surface of the pair of 1st fastening elements and the front waist region The wearing article according to any one of claims 1 to 6, comprising:
The fastening system includes a first fastening element provided on the skin facing surface of a pair of tape fastener tabs extending from both side edges of the rear waist region in the direction of the horizontal axis, and the non-skin facing surface of the front waist region. A first fastening system composed of a second fastening element located on the side, and a pair of the first fastening elements and the non-skin-facing surface of the front waist region, the first fastening system being located below the second fastening element. The wearing article according to any one of claims 1 to 6, comprising a second fastening system having three fastening elements.
In the side elastic region, the shrinkage rate of the low elastic portion is about 70 to 75%, and the shrinkage rate of the high elastic portion formed from a portion other than the low elastic portion is about 50 to 60%. The wearing article in any one of 8.