CN100384621C - Inverse textured web - Google Patents
Inverse textured web Download PDFInfo
- Publication number
- CN100384621C CN100384621C CNB2003801054827A CN200380105482A CN100384621C CN 100384621 C CN100384621 C CN 100384621C CN B2003801054827 A CNB2003801054827 A CN B2003801054827A CN 200380105482 A CN200380105482 A CN 200380105482A CN 100384621 C CN100384621 C CN 100384621C
- Authority
- CN
- China
- Prior art keywords
- fiber
- web
- precursor web
- tuft
- fleece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
Disclosed is a fibrous web comprising a first region and at least one discrete integral second region, the second region having at least one portion being a discontinuity exhibiting a linear orientation and defining a longitudinal axis, and at least another portion being a deformation comprising a plurality of tufted fibers integral with but extending from the first region.
Description
Technical field
The present invention relates to fleece, for example film and fibrous woven net and non-woven web.Specifically, the present invention relates to this laminating webs material, described fleece is handled with mechanical molding so that it has the improved fluid treatment character that is used for disposable absorbent article.
Background technology
Disposable absorbent article such as disposable diaper, incontinence product, catamenial products etc. are widely used, and people have carried out many effort and improve the validity of these goods and functional.Usually, these goods have fluid penetrable towards health layer (being commonly referred to top flat), fluid impermeable towards clothes layer (being commonly referred to egative film) and be clipped in top flat and egative film between fluid storage member (being commonly referred to absorbent cores).Other parts also are known in the art as acquisition layer, inferior top flat and fixing closure element.
The known laminated material of making web material can be combined into the fluid treatment character of each material improved fluid treatment composite.For example, known non-woven web by needle point method manufacturing integrated bond and entanglement can be combined into a kind of laminated material with two kinds of non-woven materials.This method often is called " Needling " for short.For example, authorized the United States Patent (USP) 5 of Guthrie on January 14th, 1992,080,951 disclose a kind of non-woven web of a plurality of layers of formation by the needle point method combination, described needle point method makes some fibre extend through the thickness of whole fabric and exceeds the surface, thereby stays from the outstanding short segment length's silk of fibroreticulate outer surface.Tangle with water continually and to realize the similar entanglement of two fiber non-woven knitmesh.Acupuncture is similar to hy-droentanglement, is a kind ofly to be used to make non-woven web, especially to be intended for use the fibroreticulate relatively slow of disposable product and therefore expensive method.
Acupuncture, water are tangled and be can be used to provide texture for other flat fleece such as non-woven material.In addition, other technology is as also can be used for giving film or non-woven web with texture with the roll gap of fleece by the counter-rotating knurling rolls.This texture is of value to the body contact part as goods such as clothes or disposable absorbent article usually.For example, on September 24th, 2003 is with the United States serial 10/720 of the common transfer of people's such as Hammons name submission, 557 (lawyer's file number 9130M), it requires the U.S. Provisional Application 60/434 of on December 18th, 2002 with people's such as Hammons name submission, the priority of 792 (lawyer's file number 9130P), disclose and be used for sanitary napkin veined it has improved fluid acquisition towards the health layer, and made the wearer have the health of cleaning.In people's such as Hammons application, this texture comprises bossing, and this bossing contact wearer skin is to gather the fluid from health as cleaning piece.
Yet, still need to have the parts of the disposable absorbent article of improved fluid treatment character.
In addition, also need a kind of method that can make parts with the disposable absorbent article that improves fluid treatment character relatively inexpensively.
Summary of the invention
The composite fiber web that is suitable for use as the parts in the disposable absorbent article is disclosed.This composite fiber web comprises first fibrage and the second layer, and described first and second layers respectively comprise towards bodyside with towards garment side, and is provided with into face-to-face relationship to form laminated material.First fibrage comprises with respect to the fleece of X-Y plane randomly oriented fiber and a plurality of discrete regions that redirects at its fiber on the bodyside at least, and plurality of fibers, described fiber has the part that redirects on the direction that is orthogonal to X-Y plane substantially, and towards extending towards garment side.
Description of drawings
Fig. 1 is the fibroreticulate perspective view that is applicable to goods of the present invention.
Fig. 2 is a fibroreticulate guide wire of alternative shape shown in Figure 1.
Fig. 3 is the profile in the 3-3 cross section of Fig. 2;
Fig. 4 is the plane of a fibroreticulate part shown in the 4-4 among Fig. 3.
Fig. 5 is the perspective view that is used for fleece building mortion of the present invention.
Fig. 6 is the cross-sectional view of a device part shown in Figure 5.
Fig. 7 is the perspective view of a part of building mortion that is applicable to a fibroreticulate embodiment of goods of the present invention.
Fig. 8 is the enlarged perspective of a part that is applicable to the fleece building mortion of goods of the present invention.
Fig. 9 is the guide wire of alternative shape that is applicable to fibroreticulate another embodiment of goods of the present invention.
Figure 10 is the guide wire of alternative shape that is applicable to fibroreticulate another embodiment of goods of the present invention.
The plane that Figure 11 partly excises for sanitary napkin of the present invention.
The perspective view that Figure 12 partly excises for sanitary tampons of the present invention.
The specific embodiment
Fig. 1 represents to be applicable to the laminate web 1 of goods of the present invention, is designated hereinafter simply as fleece 1.Fleece 1 comprises two-layer at least.Described each layer refers to be generally the precursor web of plane, two dimension at this paper, as first precursor web 20 and second precursor web 21.Any one precursor web all can be film, non-woven material or woven web.Precursor web 20 and 21 (and any accessory fibers net) can engage by adhesive, thermal, combination of ultrasound etc., but does not preferably use adhesive or other adhesive-bonded form to engage.Following disclosed, the composition precursor web of fleece 1 can engage by the interlocked mechanical engagement that is produced by forming of tuft 6.
Fleece 1 has first side 3 and second side 5, and term " side " is used in the common usage of the two-dimensional fiber net (as paper and the film that has two sides when being in common flat condition) that is generally the plane.First side 3 is towards garment side during use, and second side 5 is towards bodyside.Each precursor web 20 and 21 has first surface 12 and 13 respectively, and has second surface 14 and 15 (as shown in Figure 3) respectively.Fleece 1 has as vertical (MD) and horizontal (CD) of web manufacture field known to usually.Although the present invention can implement with thin polymer film and woven fleece, in a preferred embodiment, first precursor web 20 non-woven web that basic randomly oriented fiber constitutes of serving as reasons." basic random orienting " is meant the processing conditions owing to described precursor web, and the amount of possible MD (vertically) orientation fibers is higher than the amount of CD (laterally) orientation fibers, and vice versa.For example, spunbond and melt and spray in the processing continuously that a strand fiber is deposited in the support that vertically moves.Although the fiber orientation real " at random " of attempting to allow spunbond or melt-blown nonwoven knitmesh, the percentage of common machine-direction oriented fiber with horizontal compare high slightly.In a preferred embodiment, second precursor web 21 is the non-woven webs that are similar to first precursor web 20, or thin polymer film such as polyethylene film.
In one embodiment, first side 3 of fleece 1 by the exposed parts of the first surface 13 of second precursor web 21 and at least one but preferred a plurality of discrete tufts 6 limit, described discrete tufts is the integral extensions branch of nonwoven first precursor web 20 fibers.Each tuft 6 all can comprise and a plurality ofly extends through second precursor web 21 and by the outside ring-type of their first surface 13, the fiber 8 of alignment.In another embodiment, each tuft 6 can comprise a plurality of non-looped fibers 18 (as shown in Figure 3), and it is protruding from first surface 13.In another embodiment, each tuft 6 can comprise plurality of fibers, and described fiber is the integral extensions branch of nonwoven first precursor web 20 and nonwoven second precursor web 21 both fibers.Because first side 3 be the disposable absorbent article parts towards garment side, so first side is towards the inside of goods, and be known as " inverse textured " at this paper.That is to say that the texture that is provided by tuft 6 is towards the inside of goods.
In another embodiment, second precursor web 21 has enough thickness (promptly, thickness) make that in fact tuft 6 is not to push through second precursor web 21 and only be to be advanced in second precursor web 21, can't see tuft from the outside of fleece 1 like this.Therefore, same tuft 6 is towards the inside of fleece 1, and is known as " inverse textured " in this article.
Term used herein " non-woven web " is meant to have interlaced but there is no the fleece of the individual fibers or the silk thread structure of repeat patterns such in woven or the braided fabric, and described woven or braided fabric does not typically have randomly oriented fiber.Non-woven web or fabric are formed by several different methods, and for example meltblown, spun-bond process, water acupuncture manipulation, water entanglement method, air lay method and bonded carded web method comprise the carded thermal.Quantitatively representing with gram every square metre (gsm) usually of adhesive-bonded fabric.Laminate web quantitatively be each combined basis weight of forming layer and any other optional feature.Fibre diameter is represented with micron usually; Fiber size can represent that also it is the unit of every fibre length weight with the dawn.Be applicable to goods of the present invention laminate web quantitatively can be 10gsm to 100gsm, this depends on the final use of described fleece 1.
Term used herein " spun-bonded fibre " is meant the fiber of the minor diameter that forms with following method: molten thermoplastic material from a plurality of meticulous of spinning head and be generally circular capillary and be extruded as long filament, is reduced the filament diameter of extruding then fast.When being deposited on the collection surface, spun-bonded fibre is not clamminess usually.Spun-bonded fibre is generally continuous and average diameter that have (from least 10 sample) greater than 7 microns, more particularly, between about 10 and 40 microns.
Term used herein " meltblown " is meant the method for following formation fiber: with molten thermoplastic material by a plurality of meticulous, be generally circular die capillaries with fusion silk thread or filament be expressed into convergence high speed, be generally in gas (as the air) stream of heat, this air-flow attenuates to reduce its diameter the filament of molten thermoplastic, and this diameter can be to the microfibre diameter.Thereafter, meltblown fibers delivers and is deposited on the collection surface by high velocity air when still being clamminess, and forms the fleece of the meltblown fibers of random distribution.Meltblown fibers is continuous or discontinuous microfibre, and common average diameter is less than 10 microns.
Term " polymer " used herein " generally include but be not limited to homopolymers, copolymer, for example block, grafting, random and alternate copolymer, terpolymer etc., and their blend and modifier.In addition, unless otherwise specifically limited, term " polymer " " comprise all possible geometrical configuration of described material.Described configuration includes, but not limited to isotaxy, atactic, syndiotaxy and symmetrical at random.
Term used herein " one pack system " fiber is meant the fiber that only uses a kind of polymer to be shaped by one or more extruders.This and do not mean that eliminating has added wherein that a small amount of additive is used to dye, fiber that the polymer of antistatic property, lubricated, hydrophily etc. forms.These additives for example are used for the titanium dioxide that dyes, exist with the content less than about 5% weight and more typical about 2% weight usually.
Term " bicomponent fibers " used herein " be meant and extrude from extruder separately by at least two kinds of different polymer but be spun the fiber that forms a fiber.Bicomponent fibre also refers to conjugate fibre or multicomponent fibre sometimes.Described polymer is arranged in the constant distinct zone of basic fixed position, and these regional cross sections with bicomponent fibre intersect and extend continuously along the length of bicomponent fibre.For example, the configuration of this bicomponent fibre can be that sheath/core pattern is arranged, and wherein a kind of polymer is centered on by another kind of polymer, or parallel type is arranged, the cake formula is arranged or " it is starlike " arranges.
Term used herein " biconstitutent fibre " is meant by same extruder extrudes the fiber that at least two kinds of polymer as blend form.Biconstitutent fibre does not have the various polymers compositions in the basic fixed position of being arranged on completely different zone constant, that intersect with fiber cross section, and various polymer are not continuous along the whole length of fiber usually, but are generally the shaping fibril of random start and end.Biconstitutent fibre also refers to multi-constituent fibre sometimes.
What term used herein " non-circular fiber " was described is the fiber with non-circular cross sections, and comprises as known in the art " shaped fibers " and " capillary pipe fiber ".These fibers can be solid or hollow, and they can be trilobal, △ shape, and preferably have the fiber of capillary channel at its outer surface.Capillary channel can be various shape of cross sections, as " U-shaped ", " H shape ", " C shape ", " V-arrangement ".A preferred capillary pipe fiber is T-401, called after 4DG fiber, and available from TN, the Fiber Innovation Technologies of JohnsonCity.The T-401 fiber is PETG (PET).
Term used herein " integral body " " integral extensions " of tuft 6 (as be used for) is meant the fiber of the fiber source of tuft 6 from precursor web 20 and/or 21.Therefore, the fibrae circulares 8 of tuft 6 and non-looped fibers 18 can be 20 plastic deformations of first precursor web and the fiber that stretches out, and are one with first precursor web 20 therefore.Similarly, are the embodiments that comprise the non-woven material of similar extensible fibers for second precursor web 21 wherein, the fiber of second precursor web 21 can help to form tuft 6." integral body " used herein be to be used for being different from the fiber of introducing or joining in order to make tuft in the independent precursor web, for example, resembles common doing in the conventional carpet manufacture.
Can will be appreciated that suitable nonwoven first precursor web 20 should comprise and can stand enough plastic deformations and draw Zhong Zhongchang or have the ambulant fiber of enough fibers, thereby can form fibrae circulares 8.Yet people recognize that the fiber of the out-of-plane certain percentage of the first surface 12 that is pushed out first precursor web 20 will not form ring, and generation be fracture and form loose end.These fibers are called as " loose " fiber or " loose fiber ends " 18 as shown in Figure 3 at this paper.Loose fiber ends 18 is not necessarily undesirable for the present invention, and in some embodiments, the great majority of tuft 6 or whole fiber can be loose fiber ends 18.Loose fiber ends 18 also can be formed the result of tuft 6 by the non-woven web that short staple fiber is formed or comprised to short staple fiber.In this case, some artificial staple fiber ends may be projected among the tuft 6, and this depends on these situations such as height as the quantity of staple fiber in the fleece, staple fiber cut length and tuft.
In order to be used as the top flat among the present invention, first precursor web 20 can be hydrophobic relatively with respect to second precursor web 21.Therefore, can be collected in the voidage of each tuft, be transferred in the second relatively more hydrophilic precursor web 21 lower part then to goods of the present invention by the absorbed fluid of top flat.Though do not think that hydrophily or hydrophobic actual measurement are very crucial (the only relative hydrophilic/hydrophobic between first precursor web 20 and second precursor web 21), but usually, if first precursor web 20 shows spending greater than about 70 with water contact angle of having, can think that then it is hydrophobic.If second precursor web is not natural hydrophilic (that is, polymer property is not hydrophilic), then available methods known in the art make it become hydrophilic, for example, surfactant are applied to fiber and/or fleece.
In order to be used as the top flat in the absorbent article, second precursor web 21 can be almost any web material, unique preferably it is more hydrophilic with respect to first precursor web 20, and requires it to have sufficiently complete to form laminated material with the method by the following stated.In one embodiment, second precursor web can be film or the non-woven web that has enough little elongation characteristics with respect to first precursor web 20, so that when standing on the direction of second precursor web 21, to be pushed out out-of-plane fiber strain from first precursor web 20, second precursor web 21 will be broken, for example, because elongation destroys and is torn, make part first precursor web 20 can extend through (promptly like this, so-called " passing ") thus second precursor web 21 forms tuft 6 on first side 3 of fleece 1, as shown in Figure 1.In one embodiment, second precursor web 21 is a thin polymer film.In one embodiment, second precursor web can be the thin polymer film of perforate.In one embodiment, second precursor web 21 can be a non-woven web.
The representative tuft 6 of the embodiment of fleece 1 shown in Figure 1 is presented among Fig. 2 with the view of further amplification.Embodiment shown in Figure 2 be one wherein tuft be embedded in second precursor web 21 in not but from second precursor web 21, stretch out.As shown in the figure, tuft 6 comprises a plurality of fibrae circulares 8, and it aligns substantially and makes tuft 6 have tangible linear orientation and longitudinal axes L.Tuft 6 also has the axis T that is orthogonal to longitudinal axes L usually in the MD-CD plane.In embodiment as illustrated in fig. 1 and 2, longitudinal axes L is parallel to MD.In one embodiment, all isolated tufts 6 all have parallel longitudinal axes L usually.Tuft 6 number of per unit area fleece 1, i.e. the area density of tuft 6, can from per unit area for example 1 bunch every square centimeter change to up to every square centimeter 100 bunches.Every square centimeter can have at least 10 or at least 20 tufts 6, and this is decided by final use.Usually, do not require it is consistent, but tuft 6 can only exist at some region memory of fleece 1, for example have reservation shape, as the zone of linear, bar shaped, band shape, circle etc. in the whole area inner area density of fleece 1.
Can recognize that by this paper explanation in many embodiments of fleece 1, opening 4 will have tangible linear orientation and longitudinal axis, this opening is oriented the longitudinal axes L of the tuft 6 that is parallel to its correspondence.Similarly, opening 4 also will have the axis of pitch that is orthogonal to longitudinal axis in the MD-CD plane usually.What also can recognize is, therein in the embodiment of the thickness of second precursor web 21 greater than the height h of tuft 6, opening 4 will be only on the second surface 15 of second precursor web 21, and does not extend through second precursor web 21 from start to finish.In one embodiment, tuft 6 can make the first surface 14 of second precursor web 21 produce projection.
Shown in Fig. 1 to 4, the tuft 6 extensible openings 4 that pass in second precursor web 21.Opening 4 can form by making second precursor web, 21 partial fracture according to the method that describes in detail below, perhaps the fiber of second precursor web 21 is released outside the plane and formed in the mode that is similar to fiber 8.Breaking to relate to simply splitting of second precursor web 21, makes opening 4 remain a simple two-dimensional hole.Yet for some material such as thin polymer film, part second precursor web 21 can be deflected or release the outer structure that forms the flap shape in plane (that is, the plane of second precursor web 21), and this paper is called fin 7.The shape of fin 7 and structure height depend on the material property of second precursor web 21.Fin 7 can have the ordinary construction of one or more fins, as illustrated in fig. 1 and 2.In other embodiment, fin 7 can have the structure that more resembles the volcano shape, comes out from fin 7 eruptions as tuft 6.
In some sense, tuft 6 can " pass " at least a portion second precursor web 21 and be " locked " in position by the friction engagement with opening 4.For example, in certain embodiments, the transverse width of opening 4 (that is, being parallel to the size that its axis of pitch records) can be less than the Breadth Maximum (through method described below) of the tooth that forms opening.This is illustrated in a certain amount of recovery of opening part and is tending towards constrain tuft 6 outwards via being pulled from opening 4.The friction engagement of tuft and opening 4 provides and need not adhesive or thermal and form have the laminate web structure of permanent tuft a side.
Tuft 6 can get close enough at interval so that effectively cover first side 3 of fleece 1.In such embodiment, the both sides of fleece 1 seem all to comprise the non-woven fibre that becomes one with first precursor web 20, and the difference between two sides 3 and 5 is the difference of superficial makings.Therefore, in one embodiment, top flat of the present invention can be described as the laminated material of two or more precursor web, and two sides of wherein said laminate web are all covered by the fiber from a precursor web only basically.Specifically, top flat of the present invention can be described as and comprise the first relative hydrophobic component (promptly, second precursor web 21) relative hydrophilic means with second (promptly, first precursor web 20), wherein said relative hydrophilic means is from extremely extending through relative hydrophobic component towards garment side towards bodyside, and therefore be set on two sides (that is side 3 and 5) of described top flat.
Shown in Fig. 1 to 4, characteristics of tuft 6 can be fiber 8 or 18 significant direction alignment.For example, the fiber 8 of ring-type, alignment can be described to have effective vector component or the master vector component that is parallel to the Z-CD plane, and this fibrae circulares 8 has alignment orientation with respect to the axis T basically identical when observing in plan view (as Fig. 4)." ring-type " fiber 8 be meant the fiber 8 and first precursor web 20 and/or second precursor web 21 be one and beginning and ending in them, but first side 3 from fleece 1 extends outward on the Z direction.About " alignment " of the fibrae circulares 8 of tuft 6 thus be meant that fibrae circulares 8 is directed usually all, if in plane, observe as Fig. 4, each fibrae circulares 8 all has the effective vector component that is parallel to axis T, and preferably has the master vector component that is parallel to axis T.Although only shown fiber among Fig. 1 to 4 from first precursor web 20, but can understand this is because what show at these picture in pictures is film/non-woven web 1, wherein fibroreticulate elongation characteristics causes tension failure to form opening 4, and fiber 8 and/or 18 can stretch out from this opening.Figure non-woven material/non-woven web 1 if can understand, each precursor web 20 and 21 fiber all can form tuft 6, and in a kind of like this structure, tuft 6 can show the structure with basic layering, and the fiber of first precursor web 20 is arranged on the inside of tuft 6 usually.
On the contrary, non-looped fibers 18 and first or second precursor web 20 and/or 21 are one, but only originate in first or second precursor web 20 and/or 21, and have on the Z direction first side, the 3 outwardly directed free terminals from fleece 1.Loose fiber 18 also can have the alignment orientation of common unanimity, and this is described as has effective vector component or the master vector component that is parallel to the Z-CD plane.
For fibrae circulares 8 and loose fiber 18 for both and since use when making goods be wound on the roller or compression, described alignment is the feature of tuft 6 before distortion after any manufacturing.As used herein, when in plane, observing, has the effective vector component that is parallel to axis T greater than the fibrae circulares 8 of miter angle orientation to depart from longitudinal axes L as Fig. 4.As used herein, when in plane, observing, has the master vector component that is parallel to axis T greater than the fibrae circulares 8 of angular orientations of 60 degree to depart from longitudinal axes L as Fig. 4.In a preferred embodiment, the fiber 8 of at least 50%, more preferably at least 70% and even more preferably at least 90% tuft 6 has the effective vector component that is parallel to axis T, and more preferably is parallel to the master vector component of axis T.If desired, the orientation of fiber can use amplifier unit to determine, the microscope of suitable measurement scale for example is housed.Usually, for one section nonlinear fiber segment in viewed in plan view, longitudinal axes L and fibrae circulares 8 done all straight line is approximate to can be used to determine that fibrae circulares 8 departs from the angle of longitudinal axes L.For example, as shown in Figure 4, a fiber 8a shows emphatically with heavy line, and the approximate 8b of its straight line dots.This fiber becomes the angle (measuring counterclockwise from L) of about 80 degree with longitudinal axis.
In the tuft 6 orientation of fibrae circulares 8 be with the orientation of fiber composition and first or second precursor web 20 and 21 (if using non-woven web) as second precursor web 21 in pairs than, for non-woven web, this orientation is described as having the alignment of fibers of basic random orienting best.In a woven web embodiment, the orientation of fibrae circulares 8 can be same as described above in the tuft 6, but the fiber of weaving precursor web will have and be used for making the relevant orientation of this fibroreticulate concrete Weaving method (as, cubic weave patterns).
In the embodiment depicted in fig. 1, the longitudinal axes L of tuft 6 is arranged along the MD direction usually.Therefore, tuft 6 and longitudinal axes L can be arranged along any direction with respect to MD or CD in principle.Therefore, we can say usually that the fiber 8 of ring-type, alignment is arranged as usually and is orthogonal to longitudinal axes L and makes them have the effective vector component that is parallel to axis T, and more preferably has the master vector component that is parallel to axis T for each tuft 6.
In certain embodiments, because the method for optimizing of formation tuft 6 as described below, another characteristics that mainly comprise the tuft 6 of looped, aligned fibers 8 are its common hatch frames, and described structure is characterised in that the clearance gap district 10 that is limited to tuft 6 inside." interstice coverage " is not meant complete zone without any fiber; This term is meant to be described the generality of tuft 6 overall appearance.Therefore, may be in some tuft 6, a loose fiber 18 or many loose fibers 18 may be present in the interstice coverage 10." opening " interstice coverage is meant that the vertical end of two of tuft 6 normally opens wide and does not have fiber, makes tuft 6 can form some like this under uncompressed state and resemble " tunnel " structure, as shown in Figure 3.
A kind of mode of describing fleece 1 structure is with regard to the three-dimensional fiber orientation on the Z direction, for example, and as shown in Figure 3.As shown in Figure 3, distinguishablely go out at least three " zone ", each zone identifies with a part of fleece 1 on the Z direction.Be named as the bottom portion in zone 1, the fleece of Zl 1 and extend to the upper surface 13 of second precursor web 21 usually from the lower surface 14 of first precursor web 1, and comprise the basic non-reorientable fiber of first and second precursor web.The fiber of Z1 has very small amount of Z direction with respect to CD-MD plane substantial horizontal orientation.Zone 2, Z2, usually extend to the inner boundary of interstice coverage 10 from the first surface 13 of second precursor web 21, and comprise the fiber that redirects substantially, described fiber is vertical orientated substantially with respect to the CD-MD plane, that is to say that the fiber in the regional Z2 mainly is orientated in the Z direction, and very small amount of CD or MD direction are arranged.In the zone 3 that comprises tuft 6 tip parts 31 fibers, among the Z3, fiber is with respect to the common again horizontal alignment in CD-MD plane.Therefore, in one embodiment, fleece 1 is from the textural non-woven web that is described as, it limits this fibroreticulate plane under smooth usually state, described fleece comprises a bunch shape district, described bunch of shape district has three zones, each zone is characterised in that regional fiber alignment, wherein the first and the 3rd zone comprises the fiber with first orientation that is basically parallel to the fleece plane, and second area is between the first and the 3rd zone and connect the first and the 3rd zone, described second area comprises the fiber with second orientation, second orientation is orthogonal to fibroreticulate first plane substantially, that is to say, be not basically parallel to the part of the described fleece first plane orientation substantially.
Be used as in the preferred embodiment of disposable product top flat at a fleece 1, two precursor web 20 and 21 all are non-woven webs, second precursor web 21 is hydrophobic relatively with respect to first precursor web 20 (and skin or hair of preferred wearer) simultaneously, and both are tuft 6 contribution fibers with relative layer mode.In this top flat, describe more comprehensively as Figure 10 institute, major part (if not all) fiber near wearer's skin can be hydrophilic relatively, so that fluid is gone out and sees through the second hydrophobic relatively precursor web 21 from the health wicking, described second precursor web thereby can help to prevent to make skin wetting again.
Because a kind of method for optimizing of making fleece 1, second side 5 of fleece 1 shows to have is interrupted 16, the tooth that it is characterized in that being generally the former that linear breach (this breach is limited by original random fiber of the second surface 14 of first precursor web 20) described in detail below directionally (promptly, as shown in figs. 1 and 3, be orthogonal to " the Z direction " on MD-CD plane usually) be advanced in the tuft 6.The flip-flop of the shown orientation that has of fiber of first precursor web, 20 original random orientings has been determined to be interrupted 16, and its demonstration has linearity makes it can be described to have the longitudinal axis of the longitudinal axes L that is parallel to tuft 6 usually.Because as the character of many non-woven webs of first precursor web 20, be interrupted 16 may not resemble the tuft 6 clearly visible.For this reason, the interruption 16 on second side 5 of fleece 1 do not observe and may detect usually less than, unless scrutiny fleece 1.Equally, second side 5 of fleece 1 can have the outward appearance and the sense of touch of non-bunch of shape first precursor web 20.Thereby in certain embodiments, fleece 1 has the look and feel of the band texture of towelling on first side 3, and on second side 5, has smooth, soft relatively the look and feel, these two sides constitute by the fiber from same non-woven web (that is first precursor web 20).In other embodiments, be interrupted 16 and can be rendered as the hole, and may be the hole of passing fleece 1 via the end of tunnel-like tufts 6.
From to the narration of the fleece 1 that comprises at least one nonwoven first precursor web 20 as can be seen, the fiber 8 of tuft 6 or fiber 18 can originate from and extend the first surface 12 or the second surface 14 of first precursor web 20.Certainly the fiber 8 or the fiber 18 of tuft 6 also can extend out from the inside 28 of first precursor web 20.The fiber 8 of tuft 6 or fiber 18 extend owing to (that is, being pushed out in " Z direction " as shown in Figure 3) outside the plane that has been pushed out first precursor web 20 that is generally two dimension.Usually, the fiber 8 of tuft 6 or fiber 18 comprise the fiber that the fiber with precursor web 20 or 21 becomes one and extends from it.
Therefore, be understood that from the above description in one embodiment, fleece 1 can be described as the laminate web that is formed by the selectivity mechanically deform of at least the first and second precursor web, at least described first precursor web is a non-woven web, described laminate web has first side and second side, described first side comprises second precursor web and a plurality of discrete tufts, and each discrete tufts comprises a plurality ofly divides and extend through clustered fiber in second precursor web at least the first precursor fiber integral extensions; Described second side comprises first precursor web.
Because the plastic deformation and the Poisson's ratio effect of fiber, fiber 8 or 18 elongation may be accompanied by totally reducing of the fiber cross sectional dimension diameter of circular fiber (for example, for).Therefore, the alignment fibrae circulares 8 of tuft 6 fiber diameter that can have is less than the fiber diameter of the fiber of first or second precursor web 20 or 21.Found fiber cross sectional dimension reduce in the middle of the base portion 17 of tuft 6 and tip part 3 maximum.This it is believed that it is because following disclosed more comprehensively preferable production process.In simple terms, it is believed that below the part fiber at tuft 6 base portions 5 and tip part 3 places is contiguous the top of the tooth 110 of roller 104 in greater detail, and in process by friction lock and fixing.Thereby the mid portion of tuft 6 is more freely drawn the second month in a season or prolongation, and therefore, can experience reducing of corresponding fiber cross sectional dimension.
With reference to figure 5, the apparatus and method of making fleece 1 have been shown here.Device 100 comprises pair of meshing roller 102 and 104, and each roller is all around axle A rotation, and described axle A is parallel in same plane.Roller 102 comprises a plurality of protruding 106 and corresponding grooves 108, and its whole circumference around roller 102 is intactly extended.Roller 104 is similar to roller 102, but be not the projection that has around the complete extension of whole circumference of roller 102, roller 104 comprises the projection that many rows circumferentially extend, and this projection has been modified into the circumferentially spaced tooth 110 of several rows, and this tooth extends with spaced relationship around at least a portion roller 104.Each toothrow 110 of roller 104 is separated by corresponding grooves 112.On-stream, roller 102 and 104 intermeshes and makes the projection 106 of roller 102 put in the groove 112 of roller 104, and the tooth 110 of roller 104 puts in the groove 108 of roller 102.This engagement is shown in more detail in the cross-sectional view of the Fig. 6 that discusses below.Roller 102 and 104 both or one of them can heat by methods known in the art, for example use deep fat to fill roller or electric heating roller.
In Fig. 5, device 100 is shown as the preferred configuration of the fluted roller 102 with knurling rolls (as roller 104) and a non-embossing.Yet it may be preferred using two knurling rolls 104 in certain embodiments, and these two knurling rolls are in that the same respective regions or the different respective regions of roller have identical or different patterns separately.Such device can be produced the fleece with tuft 6, and described tuft 6 stretches out from the both sides of fleece 1.
The method of making fleece 1 with the continuation method of commericially feasible is depicted among Fig. 5.Fleece 1 is made by mechanically deform precursor web (as first and second precursor web 20 and 21), its each be generally plane and two dimension all can being described as by device first being processed shown in Figure 5." plane " and " two dimension " only is meant that fleece begins processing with the flat condition with respect to finished fiber net 1, and described finished fiber net is because the formation of tuft 6 has three-dimensional tangible, out-of-plane, the Z direction." plane " and " two dimension " do not refer to comprise any special glacing flatness, smoothness or dimension.
Method and apparatus of the present invention is similar to the United States Patent (USP) 5 of called after " Web MaterialsExhibiting Elastic-Like Behavior " in many aspects, 518,801 described methods, and in patent documentation afterwards, be called as " SELF " fleece, " SELF " representative " structural elasticity shape film ".Yet, have marked difference between the disclosed apparatus and method in apparatus and method of the present invention and ' 801 patents, thereby difference is obvious in the fleece of making separately.As described below, the tooth 110 of roller 104 have with forward position and back along relevant concrete how much proterties, its forward position and back make fleece be out of shape along allowing basic " wearing " the relative excessively precursor web 20,21 of tooth in itself.In a double-layer lamination fleece 1, tooth 110 promotes fiber 8 and passes formation tuft 6, and described tooth 110 is released the fiber of precursor web 20 and 21 outside the plane.Therefore, fleece 1 can have " tunnel-like " tuft 6 of the tuft 6 that comprises loose fiber ends 18 and/or ring-type, aligned fibers 8, described tuft 6 extends through and away from the surface 13 of first side 3, do not resemble SELF fibroreticulate " tent like " rib linear element, its each all have the continuous side walls that is attached thereto, that is, continuous " transitional region ", and it does not show to have the mutual perforation that one deck passes another layer.
When the top of tooth 110 pushes through first and second precursor web 20,21, mainly be oriented to the CD direction of intersecting with tooth 110 the first precursor precursor web 20 (with, in certain embodiments, part fiber second precursor web 21) is released outside the plane of first precursor web 20 by tooth 110.Fiber can be pushed out outside the plane owing to fiber moves, or they can be drawn the second month in a season and/or plastic deformation and release outside the plane on the Z direction.Released out-of-plane part precursor web by tooth 110 and cause on first side 3 of fleece 1, forming tuft 6.Mainly be orientated and be parallel to longitudinal axes L usually, promptly the precursor web 20 of MD direction and 21 fiber are simply trailed by tooth 110 as shown in Figure 1, and keep the state of their original random orientings substantially.Here it is why in embodiment (this as shown in Fig. 1 to 4) fibrae circulares 8 can show reason with unique fiber alignment, this fibrae circulares 8 accounts for the significant percentage of each tuft 6 fiber, and described tuft 6 has the effective vector component or the master vector component of the axis T that is parallel to tuft 6.
Can recognize when fleece 1 usefulness apparatus and method of the present invention prepare that by above-mentioned explanation precursor web 20,21 can have with precursor web destroys (as owing to drawing Zhong Yingli to destroy) relevant differing material properties of preceding Zhongchang ability.In one embodiment, nonwoven first precursor web 20 can have than bigger fiber mobility of second precursor web 21 and/or bigger elongation characteristics relative, make its fiber can fully move or stretch to form tuft 6, second precursor web 21 is broken simultaneously, that is, be not stretched to the needed degree of formation tuft.In another embodiment, second precursor web 21 can have bigger fiber mobility and/or bigger elongation characteristics relative with respect to first precursor web 20, makes first and second precursor web 20 and 21 all form tuft 6 like this.In another embodiment, second precursor web 21 can have bigger fiber mobility and/or bigger elongation characteristics relative with respect to first precursor web 20, make the fiber of second precursor web 21 can fully move or stretch like this to form tuft 6, first precursor web 20 is broken simultaneously, that is, be not stretched to formation tuft 6 necessary degree.
The fiber of nonwoven precursor web can stretch out outside the plane and plastic-less deformation's degree can be depending on the degree of precursor web inter-fibre-bond.For example, if the fiber of nonwoven precursor web only is that very loosely is entangled to each other, they will be easier slide (promptly moving with respect to adjacent fibre by reptation) between mutually so, and therefore easier stretching out with the formation tuft on the plane outside.On the other hand, the fiber of the nonwoven precursor web of more bonding (for example by a large amount of thermal point bond, water entanglement method etc.) will more may need to stretch out out-of-plane tuft and has plastic deformation greatly.Therefore, in one embodiment, precursor web 20 or 21 can be the non-woven web with relatively low inter-fibre-bond, and another precursor web 20 or 21 can be to have non-woven web bonding between relative higher fiber, make the extended plane of fiber of a precursor web like this, and the fiber of another precursor web can not stretch out the plane.
In one embodiment, for given maximum strain (as, the strain that is applied by device 100 tooth 110), useful is that second precursor web 21 is really broken under the tensile load that strain produced that applies.That is to say, for including only or mainly comprise for the tuft 6 of first precursor web, 20 fibers on first side 3 that will be arranged on fleece 1, second precursor web 21 must have enough low fiber mobility (if having) and/or relatively low elongation at break so that it under strain local (promptly, at strain regions) break, thereby produce opening 4, tuft 6 can stretch out from this opening.
In another embodiment, useful is regional internal strain or the stretching of second precursor web 21 in the generation strain, but does not break, and makes tuft 6 comprise the part second precursor net 21 like this.
In one embodiment, the elongation at break of second precursor web 21 is in 1% to 5% scope.Though the elongation at break of actual needs depends on the strain that causes forming fleece 1, but can recognize that for most of embodiments second precursor web 21 can show that the fleece fracture enlongation rate that has is 6%, 7%, 8%, 9%, 10% or bigger.Can recognize that also actual elongation at break can be depending on strain rate, it is the function of linear velocity for device as shown in Figure 5.Being used for fibroreticulate elongation at break of the present invention can measure with methods known in the art, as the standard tension test method of using standard tension test device (as Instron, MTS, those that Thwing-Albert produces) etc.
For first precursor web 20, second precursor web 21 can have lower fiber mobility (if having) and/or lower elongation at break (promptly, the elongation at break of single fiber, perhaps if film, be the elongation at break of film) make that second precursor web 21 is not to stretch out the degree that arrives tuft 6 outside the plane, but in that tension force dies down under the strain that tuft 6 produced by forming, as tooth 110 by device 100.In one embodiment, if second precursor web, 21 relative first precursor web 20 show to have the feasible words completely of enough low elongation at break, the fin 7 relative tufts 6 of opening 4 only stretch out outside the plane a little.Usually, the embodiment that mainly comprises first precursor web, 20 fibers for tuft 6, it is believed that elongation at break that second precursor web 21 should have is than first precursor web 20 little at least 10%, preferred little at least 30%, more preferably little by at least 50%, even more preferably little of 100% than first precursor web 20.Be used for the available methods known in the art of fibroreticulate relative fracture enlongation rate value of the present invention and measure, as the standard tension test method of using standard tension test device (as Instron, MTS, those that Thwing-Albert produces) etc.
In one embodiment, second precursor web 21 can comprise basic all fibers of MD orientation, and as bunch fiber, making does not have the fiber of CD orientation substantially.For the embodiment of such fleece 1, the fiber of second precursor web 21 can separate at opening 4 places that tuft 6 stretches out easily.Therefore, in this embodiment, the elongation at break that second precursor web 21 needn't have any minimum is not because breaking and rupturing of material is the mode that forms opening 4.
The quantity of tuft 6, spacing and big I by changing tooth 110 quantity, spacing and size and pair roller 104 and/or roller 102 carry out corresponding change in size and change in case of necessity.This change makes together with possible variation in the precursor web 20,21 manyly to have the various different fleeces 1 that are used for the fluid treatment character of disposable absorbent article and become possibility.Following described more comprehensively, the fleece 1 that comprises the combination of nonwoven/film first precursor web/second precursor web also can be used as the parts in the disposable absorbent article.Yet, even better the result derives from the combination of nonwoven/nonwoven precursor web/second precursor web, wherein two fibroreticulate fibers all have contribution to tuft 6.
Fig. 6 represents part nip roller 102 and 104 and the projection 106 and the cross section of tooth 110.As shown, tooth 110 has tooth depth TH and (notices that TH also can be applicable to height of projection; Tooth depth and height of projection equate in a preferred embodiment) and the section of being called apart from tooth-space width (or projection-protruding spacing) of P.As shown, depth of engagement E is measuring of roller 102 and 104 engagements, and measures from top to the top of tooth 110 of projection 106.Depth of engagement E, tooth depth TH and section can change according to the character of precursor web 20,21 and the desirable characteristics of fleece 1 if desired apart from P.For example, usually, mesh degree E is big more, and it is big more that part will form essential percentage elongation or fiber-fiber mobility that the fiber of the precursor web of tuft must have.Equally, the required density (tuft 6 on the per unit area fleece 1) of tuft 6 is big more, and section is apart from should be more little, and the long TL of tooth and tooth pitch TD should be more little, and is as described below.
Fig. 7 represents to have an embodiment of the roller 104 of a plurality of teeth 110, this roller can be used for by quantitatively between about 60gsm and 100gsm, preferably nonwoven first precursor web 20 of about 80gsm and density be about 0.91 to 0.94 and quantitative for the polyolefin film of about 20gsm (as, polyethylene or polypropylene) second precursor web, 21 manufacturing fleeces 1.
The zoomed-in view of tooth 110 as shown in Figure 8.In this embodiment of roller 104, tooth 110 has consistent circumferential length size TL, usually from forward position LE to tooth top 111 afterwards be measured as about 1.25mm along TE, and on circumference evenly spaced apart mutually with about 1.5mm apart from TD.For quantitatively making terry-cloth web 1 at about 60 fleeces 1 to about 100gsm scope by total, the length T L scope that the tooth 110 of roller 104 can have is from about 0.5mm to about 3mm, and spacing TD is that about 0.5mm is to about 3mm, tooth depth TH scope from about 0.5mm to about 5mm, and section apart from P between about 1mm (0.040 inch) and about 5mm (0.200 inch).Depth of engagement E can be about 0.5mm to about 5mm (equaling tooth depth TH up to maximum).Certainly, E, P, TH, TD and TL can change size, spacing and the area density (tuft 6 numbers in the per unit area fleece 1) to obtain required tuft 6 independently of each other.
As shown in Figure 8, each tooth 110 has top 111, forward position LE and back along TE.Tooth top 111 is elongated and is generally portrait orientation, and is consistent with the longitudinal axes L of tuft 6 and interruption 16.It is believed that the looped tufts 6 that rises bunch for the fleece 1 that obtains being described as being terry cloth-like, LE and TE should fully almost be orthogonal to the local periphery surface 120 of roller 104.Best, from the top 111 and the transition of LE or TE should be acute angle, as the right angle, have enough little radius of curvature and make tooth 110 can push through second precursor web 21 in LE and TE place.Be not bound by theory, it is believed that the top transition that has into relative acute angle between the top of tooth 110 and LE and the TE make tooth 110 can " neatly ", that is to say, local and clearly penetrate precursor web 20,21, make first side 3 of gained fleece 1 can be described as " bunch shape " rather than " distortion " like this.When adding man-hour like this, except that the elasticity that precursor web 20 and 21 may have at first, fleece 1 is not endowed any special elasticity.
Under the higher line speed conditions, promptly higher relatively fleece is by the process velocity of rotation roller 102 and 104 roll gaps, and same material can make tuft 6 show to have very different structures.Tuft 6 shown in Fig. 9 is structurally similar with the tuft shown in Fig. 2, but show and have very different structures, the structure that looks like typical spunbond nonwoven first precursor web 20 promptly, is processed to form tuft 6 under the high strain rate under relatively at a high speed.The typical case of this structure be tuft 6 near part, i.e. the tip part of base portion 7 and tuft 6, promptly broken fiber between the top 31 and tuft 6 tops look like those of fiber " bunch clump " 19.Bunch clump 19 comprises the fibrae circulares 8 of not fracture and is supported by it at the top of tuft 6, and comprises no longer the part broken fiber 11 that becomes one with first precursor web 20.That is to say that bunch clump 19 comprises that original and precursor web 20 are for one but the pars fibrosa that separates from precursor web 20 fully after (as the linear velocity of 30 meters of per minutes in method as described in Figure 5) under the sufficiently high linear velocity processes.
Therefore, be understood that from the above description in one embodiment, fleece 1 can be described as the laminate web that is formed by the selectivity mechanically deform of at least the first and second precursor web, at least described first precursor web is a non-woven web, described laminate web has first towards garment side, this first comprises described second precursor web and a plurality of discrete tufts towards garment side, and each discrete tufts comprises and becomes one with first precursor web but stretch out the fiber of first precursor web and neither become one with first precursor web and do not stretch out the fiber of first precursor web.
Although it is believed that at the observed obvious fiber alignment in the distal tip office of tuft 6, as bunch clump 19, mainly be because process velocity, but it is believed that also it also is subjected to the influence of other parameter, and quantitatively and can influence the bonding processing temperature of fiber-fiber as the fiber type of precursor web 20 and 21.Bunch clump of fiber it is believed that the top that appears at the tooth 110 of roller 104 adds relevant tuft 6 parts in man-hour.It is believed that fiber with fiber " locking " in position, thereby restriction elongate fiber and/or fiber move, and believe that these two kinds of mechanism make the formation of tuft 6 become possibility in the friction engagement of tooth tip.Therefore, in case we can say and be locked in the appropriate position, the fiber on adjacent teeth 110 tops just can rupture, and because any entanglement of precursor web and because possible the cold welding that the fiber of pressure and friction causes, broken fiber 11 begins also to remain resident in bunch clump 19 of tuft 6 ends 3.
Precursor web with relative high basis weight has more relatively fiber 11 parts usually in bunch clump 19.In some sense, seem to seem in process of production near most of fibre compositions of the precursor web of tooth top portion 110 can be only in the Z direction by the tip part 3 of simple substitute to tuft 6, produce bunch clump 19.First precursor web 20 that comprises relative low elongation fiber or have a fiber of relatively low fiber-fiber mobility (as, relatively limited fiber surface wriggling ability) it seems that the fiber that can cause relatively small amount begins and remains resident in bunch clump 19 at tuft 6 terminal 3 places.Fiber-fiber mobility can fiber-fiber is bonding to be increased by reducing or eliminating.Heat bonding can be eliminated (that is, by there not being bonding avoiding) fully or significantly reduce to increase fiber-fiber mobility in some non-woven web.Similarly, water thorn fleece can still less tangle to increase fiber-fiber mobility.For any precursor web 20, in first being processed as disclosed herein it being lubricated also to increase fiber-fiber mobility.For example, can before first precursor web 20 enters the roll gap 116 of roller 102 and 104, mineral oil lubricant be used thereon.In addition, plasticizer such as vaseline can be added in some plastic wire such as polyethylene or polyethylene and the polypropylene fiber net, to strengthen ductility.
Not bound by theory, it is believed that if the fiber of first precursor web has the altitude curve shape as curling or curved fiber, compare with more linear fiber conformation so, gained tuft 6 will have more fibrae circulares 8 and less broken fiber 18.The chance that it is believed that the bridging between two adjacent teeth of this fiber conformation is less, and since they at it more than breakaway poing and be not easy to stretch, the chance that therefore forms complete circulus is bigger.In addition, these curvilinear-shaped fibers also can be made by using eccentric bicomponent fibers or side-by-side bicomponent fibre (as the bicomponent fibre of being made up of polyethylene and nylon).
In another embodiment of fleece 1, after utilizing said method to form tuft 6, the tip part 3 of tuft 6 is heated to form discrete fibre thermal part, makes contiguous pars fibrosa engage one another like this and has the tuft 6 that tip dissolves the stick portion 9 of tendency with formation, as shown in figure 10.
Found some non-woven web, as comprise the carded web of staple length fiber, when as precursor web, in tuft 6, produce considerably less fibrae circulares 8, make the tuft 6 that in these fleeces, produces to be described as like this and comprise a plurality of fibers 8 as the described ring-type of above Fig. 1 to 4, alignment.But the carded non-woven web can produce the tuft 6 of the unjustified and/or broken fiber 18 of fiber 8 with a small amount of (if any) ring-type, alignment and a large amount of (if being not entirely).It is believed that the unjustified of fiber in the tuft of being made by carded web 6 is that part is because the character of carded web fibre composition.Staple fiber is not " endless ", but has about 15mm to about 100mm, and more typical about 40mm is to the predetermined length of about 80mm.Therefore, when carded web adds man-hour with the described device of Fig. 5, it is believed that to have very large this possibility: the loose fibres end will be positioned at tuft 6 near, thereby in tuft 6, produce acyclic fiber ends.In addition, the Zhongchang characteristic that staple fiber does not have with for example spunbond or meltblown fibers is identical usually.Yet even tuft 6 does not have fibrae circulares, fibrous tuft still provides soft beneficial effect, and obtains applicable to the fleece in the disposable absorbent article.
In preferred embodiments, precursor web is a non-woven web, wherein exists minimum fiber-fiber bonding.For example, precursor web can be the non-woven web with pattern of discrete thermal point bonds, and this is generally known in art for nonwoven webs.Yet, it is believed that the minimum number that need make bounding point usually, and make that spacing is maximum to be had a large amount of fibers and move and misplace so that make when forming for tuft 6.Usually, utilize and to have big relatively diameter and/or high relatively elongation at break and/or the high relatively ambulant fiber of fiber can produce better and the tuft 6 of clearer shaping.
Although fleece 1 is disclosed in the two layer web of being made by two precursor web in preferred embodiments, it need not be confined to two-layer.For example, can make three layers or more multi-layered laminated material, as long as one of precursor web external its in extended plane forms tuft on garment side by three or more precursor web.Usually, needn't use adhesive or other adhesive bonding method to make laminate web 1.The composition layer of fleece 1 (as, precursor web 20 and 21 and any other layer) can be maintained at aspectant lamination by " locking " effect of tuft 6 concern that described tuft stretches out from the opening 4 of second precursor web 21.In certain embodiments, may need to use adhesive or thermal or other adhesive bonding method, this depends on the final use of fleece 1.For example, comprise that the fleece 1 of bicomponent fibre non-woven web can be in that to form tuft 6 backs bonding so that the bonding of layer and layer to be provided by the convection current air, thus the bigger peel strength of acquisition.In addition, also may need adhesive is applied to the part of one of precursor web.For example, in certain embodiments, the specific region that adhesive between the layer or thermal optionally are applied to fleece 1.For example, using under the situation of adhesive, adhesive can be used in a continuous manner, as the slot type coating, or uses in discontinuous mode, as spraying, extrude etc.The discontinuous forms such as can be bar, band, droplet of using of adhesive.
In multi-layered web 1, each precursor web can have different material characters, thereby the fleece 1 that has with as the relevant beneficial property of disposable absorbent article top flat can be provided, and is following described more comprehensively.For example, for good fluid treatment, first precursor web 20 can be by hydrophilic relatively fibrous.Second precursor web 21 can be a thin polymer film, as, polyethylene film, and can be hydrophobic or is become hydrophobic.When as the top flat on the disposable absorbent article, this fibroreticulate tuft 6 can form the upper strata, that is, and and the body contact layer.The fluid that is deposited on upper strata, the hydrophilic relatively tuft is transferred to the first precursor fiber mesh portions under the second film precursor fiber web layer from hydrophobic relatively film rapidly.The reason that observed rapid fluid shifts is common aligned fibers 8, the 18 formed capillary pipe structures by tuft 6.Fiber 8,18 forms the capillary of direction alignment between adjacent fiber, and capillarity strengthening near near the convergence of the total fiber the part 7 by tuft 6.
In one embodiment, fleece 1 comprises nonwoven first precursor web 20 and second precursor web, described nonwoven first precursor web comprises quantitatively for the spunbond non-woven material of about 80gsm and comprises that average diameter is about 33 microns polyethylene/polypropylene (sheath/core pattern) bicomponent fibre that described second precursor web comprises that grammes per square metre is the polyethylene film of 20gsm.In this embodiment, fleece 1 every square centimeter of 24 tufts 6 of having an appointment, tuft 6 has the fiber 8 of a plurality of ring-types, alignment, and wherein the fiber diameter of each is about 18 microns.Such fleece can be used as the top flat of disposable absorbent article valuably, as following relevant shown in Figure 11.For example, this fleece 1 be fluid impermeable except in tuft 6 zone, described tuft 6 regional permissions from fleece 1 second towards bodyside 5 with fluid wicking to the first towards garment side 3.
In one embodiment, property is illustrated as schematically shown in Figure 10, can use two nonwoven precursor web, and each precursor web has enough fiber mobility or elongation makes tuft 6 comprise the fiber of each precursor web.
Figure 11 represents the sanitary napkin plane of part excision, and described sanitary napkin is with the parts one of of fleece 1 of the present invention as it.Usually, sanitary napkin 200 comprise egative film 202, top flat 206 and be arranged on top flat 206 and egative film 202 between absorbent cores 204, described sanitary napkin can be engaged near 210 at periphery.Sanitary napkin 1 can have the part of extending laterally, so-called " wing " 208, and it is designed to wrap up the side of sanitary napkin 1 user's interior crotch area.Sanitary napkin (comprising as its top flat towards body surface) is well known in the art, and does not need to describe in detail various replacements and optional design.Yet, notice that fleece 1 can be used as one or more in egative film, core, top flat, inferior pre-sheet or the wing material, or as their parts.
Fleece 1 especially can be used as the top flat 206 of sanitary napkin 200.As mentioned above, comprise that the fibroreticulate top flat 206 of the present invention that the hydrophilic relatively nonwoven of use first precursor web 20 and the relative second hydrophobic precursor web 21 are made provides top flat 206, when observing in the plane at Figure 11, described top flat exists hydrophilic substantially towards body surface.Top flat 206 can comprise two-layer, that is, corresponding to one deck of each precursor web, and second precursor web can be considered to time top flat.But because two fleeces are joined so the lamination synthetic, so they are known as top flat 206 at this paper.Quantitatively can changing of precursor web for the consideration of cost and benefit.Usually, need total quantitatively fleece between about 20gsm and 100gsm 1 as the top flat 206 of disposable absorbent article such as sanitary napkin.Second precursor web 21 can be non-woven web or thin polymer film fleece.When making hydrophilic/hydrophobic (fleece is with respect to another) non-woven material/film laminate, find fleece 1 preventing to bleed back and combine with the flexibility of fiber tuft and fluid capillarity and fluid impermeable thin polymer film.Similarly, when making hydrophilic/hydrophobic (fleece is with respect to another) nonwoven/nonwoven laminate, find that also fleece 1 combines the gush out fluid acquisition of the acceptable flexibility of consumer with brilliance with bleeding back property.
Fleece 1 also can be used as the fluid storage element, as shown in figure 11 the core 204 of sanitary napkin 200.Specifically, comprise the non-woven material of the core material or second precursor web of high relatively thickness airfelt, make tuft 6 really not extend through second precursor web.In one embodiment, when first side 3 of fleece 1 is during towards garment side, absorbent cores 204 is effectively, makes interruption 16 effectively fluid be guided to the inside of core 204 like this.
Figure 12 represents the plane of the part excision of catamenial tampons plug 300, and described sanitary tampons is with the parts one of of fleece 1 of the present invention as it.Usually, sanitary tampons 300 comprises the covering wrappage 304 of absorbent cores 302 with the fluid penetrable that covers absorbent cores 302 of compression.Cover wrappage 304 and can be extended out an end of absorbent cores 302 to form shirt rim part 306.Can provide and remove parts such as cord 308 so that use the back to take out sanitary tampons.Sanitary tampons comprises the covering wrappage that touches the surface as its body, is well known in the art, and does not need to describe in detail various replacements and optional design.Yet, notice that fleece 1 can be used as to cover wrappage, absorbent core material or remove one or more in the component materials, or as their parts.When being used for sanitary tampons, it should be noted " towards the coat " side that does not have fleece 1 technically, therefore first side 3 be " to interior orientation " side of fleece 1 in sanitary tampons, and second side 5 be fleece 1 " outside orientation " side.
From the explanation of above fleece of the present invention 1 and device 100, be appreciated that the structure that can under the situation that does not deviate from protection scope of the present invention, produce many various fleeces 1, as in additional claims, being subjected to those of claims protection.For example, fleece 1 can be used distillate medicinal water, medicament, washing fluid, antiseptic solution, emulsion, aromatic, surfactant coated or processing.Specifically, the hydrophile/lipophile balance (HLB) that has of hydrophobic relatively distillate medicinal water is less than or equal to 7.This distillate medicinal water can be the vaseline base, and can comprise skin treatment agents and other composition, and U.S. Patent Application Serial Number is that 10/444,241 (lawyer's file number 8725R2) is disclosed as is generally known.
The relevant portion of all documents of quoting in detailed Description Of The Invention is incorporated herein by reference; It is to its approval as prior art of the present invention that the quoting of any document not can be regarded as.
Although illustrated and described specific embodiments of the present invention, it will be apparent to those skilled in the art that many other variations and modifications may be made in the case of without departing from the spirit and scope of protection of the present invention.Therefore in additional claims, comprise all such changes and modifications in the scope of the invention consciously.
Claims (15)
1. composite fiber web that is suitable for use as the parts in the disposable absorbent article, described composite fiber web comprises first fibrage and the second layer, described first and second layers respectively comprise towards bodyside and towards garment side and the relation of being arranged to face-to-face to form laminated material, described first fibrage comprises the fleece with respect to the X-Y plane randomly oriented fiber, and comprise a plurality ofly at least in the described discrete regions that fiber redirects on the bodyside, wherein plurality of fibers has the part that redirects and extends towards garment side towards the described of the described second layer on the direction that is orthogonal to described X-Y plane substantially.
2. composite fiber web as claimed in claim 1, wherein each described discrete regions has longitudinal axis is limited to linear orientation in the described X-Y plane.
3. composite fiber web as claimed in claim 1, the wherein said second layer is a fibrage.
4. composite fiber web as claimed in claim 1, the wherein said second layer is a polymer film layer.
5. composite fiber web as claimed in claim 4, wherein said polymer film layer is perforate.
6. composite fiber web as claimed in claim 3, wherein said first fibrage or described second fibrage are non-woven web, described non-woven web is included in one or more fibers that there are differences in nature, and described character is selected from: quantitatively, thickness, fiber type, fiber size, fiber surface energy and hydrophobicity.
7. composite fiber web as claimed in claim 6, wherein said first fibrage or second fibrage are selected from air lay non-woven web, spunbond non-woven web, melt-blown nonwoven knitmesh and carded non-woven web.
8. composite fiber web as claimed in claim 1, it is online that wherein said a plurality of discrete regions are evenly distributed on described composite fibre.
9. composite fiber web as claimed in claim 6, wherein said first or the described fiber of the second layer comprise the polymer that is selected from polyethylene, polypropylene, polyester and their blend.
10. composite fiber web as claimed in claim 6, wherein said first or the described fiber of the second layer comprise bicomponent fibre.
11. composite fiber web as claimed in claim 6, wherein said first or the described fiber of the second layer comprise non-circular fiber.
12. composite fiber web as claimed in claim 1, wherein fiber has the part that redirects on the direction that is orthogonal to described X-Y plane substantially, and extends through described second precursor web towards described towards garment side.
13. composite fiber web as claimed in claim 1, wherein fiber has the part that redirects on the direction that is orthogonal to described X-Y plane substantially, and extends towards garment side towards described, but does not extend through described second precursor web.
14. composite fiber web as claimed in claim 1 is as the top flat of disposable absorbent article.
15. composite fiber web as claimed in claim 1 is as the absorbent cores of disposable absorbent article.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32466102A | 2002-12-20 | 2002-12-20 | |
| US10/324,661 | 2002-12-20 | ||
| US10/435,996 | 2003-05-12 | ||
| US10/610,299 | 2003-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1723120A CN1723120A (en) | 2006-01-18 |
| CN100384621C true CN100384621C (en) | 2008-04-30 |
Family
ID=35912801
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801050347A Expired - Lifetime CN100564641C (en) | 2002-12-20 | 2003-12-16 | The laminate web of bunch shape |
| CN200380105487A Expired - Fee Related CN100579495C (en) | 2002-12-20 | 2003-12-16 | Fixable tufted laminate |
| CNB2003801053773A Expired - Fee Related CN100522119C (en) | 2002-12-20 | 2003-12-16 | Tufted fibrous web |
| CNB2003801054827A Expired - Fee Related CN100384621C (en) | 2002-12-20 | 2003-12-16 | Inverse textured web |
| CNB2003801069663A Expired - Fee Related CN100396271C (en) | 2002-12-20 | 2003-12-16 | Cloth-like personal care articles |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801050347A Expired - Lifetime CN100564641C (en) | 2002-12-20 | 2003-12-16 | The laminate web of bunch shape |
| CN200380105487A Expired - Fee Related CN100579495C (en) | 2002-12-20 | 2003-12-16 | Fixable tufted laminate |
| CNB2003801053773A Expired - Fee Related CN100522119C (en) | 2002-12-20 | 2003-12-16 | Tufted fibrous web |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801069663A Expired - Fee Related CN100396271C (en) | 2002-12-20 | 2003-12-16 | Cloth-like personal care articles |
Country Status (2)
| Country | Link |
|---|---|
| CN (5) | CN100564641C (en) |
| ZA (4) | ZA200504231B (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2545877T3 (en) * | 2007-12-07 | 2015-09-16 | The Procter & Gamble Company | Absorbent core |
| US20100310810A1 (en) * | 2009-06-03 | 2010-12-09 | Eric Bryan Bond | Structured Fibrous Web |
| US20100312212A1 (en) * | 2009-06-03 | 2010-12-09 | Eric Bryan Bond | Fluid Permeable Structured Fibrous Web |
| US20100310845A1 (en) * | 2009-06-03 | 2010-12-09 | Eric Bryan Bond | Fluid permeable structured fibrous web |
| JP2011131044A (en) * | 2009-11-24 | 2011-07-07 | Kao Corp | Absorbent article |
| EP2533744A1 (en) * | 2010-02-11 | 2012-12-19 | The Procter & Gamble Company | Absorbent article comprising fluid handling zones |
| US8308702B2 (en) * | 2010-04-21 | 2012-11-13 | Johnson & Johnson Consumer Companies, Inc. | Foaming porous pad for use with a motorized device |
| US20120238982A1 (en) * | 2011-03-15 | 2012-09-20 | Paul Thomas Weisman | Structured Fibrous Web |
| JP6107820B2 (en) * | 2013-02-26 | 2017-04-05 | 東レ株式会社 | Non-woven |
| JP5946487B2 (en) | 2013-04-01 | 2016-07-06 | 花王株式会社 | Hair cosmetics, hair treatment method using the same, and scalp wiping method |
| CN103422256B (en) | 2013-07-17 | 2016-08-24 | 厦门延江新材料股份有限公司 | A kind of hot-wind nonwoven cloth |
| EP3177247B1 (en) * | 2014-08-06 | 2024-04-24 | The Procter & Gamble Company | Method for making an apertured web |
| CN106661790B (en) * | 2014-08-20 | 2019-05-28 | 东丽株式会社 | Hygienic material non-woven fabrics and hygienic material product |
| MX2017003116A (en) | 2014-09-10 | 2017-05-23 | Procter & Gamble | Nonwoven web. |
| EP3209824B1 (en) * | 2014-09-12 | 2018-11-28 | The Procter and Gamble Company | Nonwoven material having discrete three-dimensional deformations with wide base openings that are base bonded to additional layer |
| EP3234244B1 (en) * | 2014-12-17 | 2020-02-05 | PrimaLoft, Inc. | Fiberball batting and articles comprising the same |
| CN104545722A (en) * | 2014-12-31 | 2015-04-29 | 杭州诺邦无纺股份有限公司 | Easy-cleaning wiping non-woven fabric and manufacturing method thereof |
| CN104562451B (en) * | 2014-12-31 | 2017-12-12 | 杭州诺邦无纺股份有限公司 | Easy decontamination non-woven fabrics and preparation method |
| RU2664357C1 (en) * | 2015-01-14 | 2018-08-16 | Ска Хайджин Продактс Аб | Absorbent article comprising nonwoven material |
| WO2016168242A1 (en) * | 2015-04-13 | 2016-10-20 | Rhodia Operations | Mild surfactant formulations for skin cleansing |
| GB2537841B (en) * | 2015-04-27 | 2020-12-09 | Medtrade Products Ltd | Wound dressing |
| BE1023284B1 (en) * | 2015-12-30 | 2017-01-20 | Beaulieu International Group | Exhibition or event tapiit with massive multi-lobe fibers |
| EP3426213B1 (en) * | 2016-03-11 | 2020-11-11 | The Procter and Gamble Company | Nonwoven material having discrete three-dimensional deformations with improved protrusion dimensions after compression |
| WO2017192978A1 (en) * | 2016-05-05 | 2017-11-09 | The Procter & Gamble Company | Topsheets integrated with heterogenous mass layer |
| US20180071156A1 (en) * | 2016-09-09 | 2018-03-15 | The Procter & Gamble Company | Three-Dimensional Apertured Substrates |
| WO2018158963A1 (en) * | 2017-02-28 | 2018-09-07 | L'oreal | Nonwoven solid material suitable for topical applications |
| US20200054501A1 (en) * | 2017-08-31 | 2020-02-20 | Kao Corporation | Nonwoven fabric |
| CN109537168B (en) * | 2017-09-22 | 2022-09-13 | 金红叶纸业集团有限公司 | Nonwoven fabric and wet wipe |
| US11857397B2 (en) * | 2017-11-06 | 2024-01-02 | The Procter And Gamble Company | Absorbent article with conforming features |
| CN108774811B (en) * | 2018-05-31 | 2021-04-20 | 湖州品创孵化器有限公司 | Non-woven fabric forming device |
| JP7055068B2 (en) * | 2018-06-12 | 2022-04-15 | 花王株式会社 | Wiping sheet |
| TWI778276B (en) * | 2018-06-29 | 2022-09-21 | 日商優你 嬌美股份有限公司 | Liquid-permeable sheet for absorbent articles |
| JP6445732B1 (en) * | 2018-09-10 | 2018-12-26 | ユニ・チャーム株式会社 | Absorbent articles |
| CN109266470A (en) * | 2018-09-20 | 2019-01-25 | 重庆丝玛帛科技有限公司 | A kind of fibre with cleaning function |
| CN110284261B (en) * | 2019-07-10 | 2022-02-22 | 武汉纺织大学 | Preparation method of reverse osmosis composite non-woven fabric |
| CN110450482A (en) * | 2019-08-24 | 2019-11-15 | 简肌方式日用化妆品(广州)有限公司 | A kind of disposable face cleaning towel of composite natral plant fiber and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511740A (en) * | 1964-09-08 | 1970-05-12 | British Nylon Spinners Ltd | Tufted fabrics and methods of making them |
| US3695270A (en) * | 1970-01-22 | 1972-10-03 | Int Playtex Corp | Sanitary tampon |
| US4596567A (en) * | 1984-08-17 | 1986-06-24 | Personal Products Company | Perf-embossed absorbent structure |
| CN1359281A (en) * | 1999-06-30 | 2002-07-17 | 强生有限公司 | Tampon having apertured film cover thermobonded to fibrous absorbent structure |
| CN1366873A (en) * | 2000-12-25 | 2002-09-04 | 尤妮佳股份有限公司 | Body fluid absorption dress article |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2411685B2 (en) * | 1974-03-12 | 1976-09-02 | Zocher, Josef, 5100 Aachen | METHOD AND DEVICE FOR MANUFACTURING A NON-WOVEN PILOT FABRIC |
| FR2713083B1 (en) * | 1993-12-03 | 1996-01-19 | Kaysersberg Sa | Feminine hygiene article fitted with menstrual flow sensors. |
| US5624427A (en) * | 1995-01-18 | 1997-04-29 | The Procter & Gamble Company | Female component for refastenable fastening device |
| DE19705737C2 (en) * | 1997-02-14 | 2000-04-27 | Spinnerei C B Goeldner Gmbh & | Medical absorbent and process for its manufacture |
| US6197404B1 (en) * | 1997-10-31 | 2001-03-06 | Kimberly-Clark Worldwide, Inc. | Creped nonwoven materials |
| CA2310651C (en) * | 1997-11-19 | 2006-02-14 | The Procter & Gamble Company | Personal cleansing wipe articles having superior softness |
| EP0963747A1 (en) * | 1998-06-04 | 1999-12-15 | The Procter & Gamble Company | Disposable absorbent article having fecal management member |
| US6217889B1 (en) * | 1999-08-02 | 2001-04-17 | The Proctor & Gamble Company | Personal care articles |
-
2003
- 2003-12-16 CN CNB2003801050347A patent/CN100564641C/en not_active Expired - Lifetime
- 2003-12-16 CN CN200380105487A patent/CN100579495C/en not_active Expired - Fee Related
- 2003-12-16 CN CNB2003801053773A patent/CN100522119C/en not_active Expired - Fee Related
- 2003-12-16 CN CNB2003801054827A patent/CN100384621C/en not_active Expired - Fee Related
- 2003-12-16 CN CNB2003801069663A patent/CN100396271C/en not_active Expired - Fee Related
-
2005
- 2005-05-24 ZA ZA200504231A patent/ZA200504231B/en unknown
- 2005-05-24 ZA ZA200504240A patent/ZA200504240B/en unknown
- 2005-05-24 ZA ZA200504229A patent/ZA200504229B/en unknown
- 2005-05-25 ZA ZA200504264A patent/ZA200504264B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511740A (en) * | 1964-09-08 | 1970-05-12 | British Nylon Spinners Ltd | Tufted fabrics and methods of making them |
| US3695270A (en) * | 1970-01-22 | 1972-10-03 | Int Playtex Corp | Sanitary tampon |
| US4596567A (en) * | 1984-08-17 | 1986-06-24 | Personal Products Company | Perf-embossed absorbent structure |
| CN1359281A (en) * | 1999-06-30 | 2002-07-17 | 强生有限公司 | Tampon having apertured film cover thermobonded to fibrous absorbent structure |
| CN1366873A (en) * | 2000-12-25 | 2002-09-04 | 尤妮佳股份有限公司 | Body fluid absorption dress article |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1722998A (en) | 2006-01-18 |
| ZA200504264B (en) | 2006-04-26 |
| CN1720362A (en) | 2006-01-11 |
| CN100579495C (en) | 2010-01-13 |
| CN100396271C (en) | 2008-06-25 |
| CN100564641C (en) | 2009-12-02 |
| CN100522119C (en) | 2009-08-05 |
| CN1722999A (en) | 2006-01-18 |
| ZA200504231B (en) | 2006-02-22 |
| CN1723120A (en) | 2006-01-18 |
| CN1728979A (en) | 2006-02-01 |
| ZA200504229B (en) | 2006-04-26 |
| ZA200504240B (en) | 2006-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100384621C (en) | Inverse textured web | |
| CN1968663B (en) | Absorbent article with lotion-containing topsheet | |
| CN102361614B (en) | Capped tufted laminate web | |
| KR100803015B1 (en) | Tufted laminate web | |
| US9694556B2 (en) | Tufted fibrous web | |
| JP4205101B2 (en) | Composite web and topsheet | |
| KR20080018259A (en) | Tufted fibrous web | |
| CN1968664B (en) | Compression resistant nonwovens | |
| AU2006209374B9 (en) | Tufted fibrous web |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20211216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |