WO2007023965A1

WO2007023965A1 - Method of manufacturing absorbent and absorptive article

Info

Publication number: WO2007023965A1
Application number: PCT/JP2006/316774
Authority: WO
Inventors: Sadanao Manabe; Akinori Fukae; Kouji Kondo
Original assignee: Daio Paper Corporation
Priority date: 2005-08-25
Filing date: 2006-08-25
Publication date: 2007-03-01
Also published as: JPWO2007023965A1; JP2012055744A; JP5258954B2; JP5044406B2

Abstract

[PROBLEMS] To manufacture an absorbent enabling the free design of specified performances such as date, thickness, elasticity, density, and rigidity. [MEANS OF SOLVING THE PROBLEMS] When a filament assembly (52Z) is formed by opening a tow (52Y), the plurality of tows (52Y) are fed to opening devices (110), respectively, to form the plurality of filament assemblies (52Z). These filament assemblies are collectively arranged to manufacture a single absorbent.

Description

Specification

Absorbent article and manufacturing method of absorbent body

Technical field

The present invention relates to a method for manufacturing an absorbent body using tow and an absorbent article.

Background art

[0002] Absorbent articles such as infant and adult tape-type and pants-type disposable diapers and sanitary napkins include a top sheet on the use side, a backsheet that prevents permeation of body fluid on the back side, and these The basic element is an absorbent element that is interposed between the sheets and receives and holds excreted body fluid that has permeated through the top sheet.

[0003] For this basic element, a form that improves the touch when a plastic sheet is used as a knock sheet, for example, by providing an exterior sheet such as non-woven fabric on the back side of the knock sheet, and so-called knocks on both sides of the product. Forms that provide elastic stretch to improve fit around the waist and abdomen, such as forms that form rear cuffs, are appropriately added.

[0004] Conventionally, staple fibers are generally used as absorbent elements for receiving and holding body fluid that has passed through the top sheet on the use surface side. It is also known to use highly absorbent polymer particles (hereinafter also referred to as “SAP”) to increase the amount of absorption in body fluids.

[0005] There is a case where SAP is dispersed when dispersed on a staple fiber of short pulp fibers, and SAP of pulp short fibers is dispersed and held (Patent Document 1).

[0006] On the other hand, in recent years, as shown in Special Table 2002-524399 (W099 / 27879: Patent Document 2) and Special 2004-500165 (US Patent 6,646, 180: Patent Document 3). It has been proposed to use filaments as absorbent elements.

[0007] Special Table 2004-500165 discloses an absorbent element mainly composed of SAP and supplemented with a filament assembly. This absorbent element is a laminate comprising an absorbent layer between about 50 to 95% by weight of SAP and about 5 to 50% by weight of a water-insoluble hydrophilic polymer such as starch and fibers, provided between an upper layer and a lower layer. This is a structure, which is folded into a C-shaped cross section and It is a formation of Yannel. JP 2004-500165 discloses the use of filament as an example of fiber.

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2004-65300

Patent Document 2: Japanese Translation of Special Publication 2002—524399 (W099 / 27879)

Patent Document 3: Japanese Patent Publication No. 2004-500165 (US Pat. No. 6,646,180)

Disclosure of the invention

Problems to be solved by the invention

[0008] When forming a filament aggregate obtained by opening the tow while pressing, a large number of performances such as basis weight, thickness, elasticity, density, and rigidity of the filament aggregate are obtained by the opening. Because it changes at once, it was impossible to design these performances individually and freely.

. As a result, even in the absorber, a certain performance such as basis weight, thickness, elasticity, density, and rigidity could not be designed individually and freely.

[0009] Therefore, the main problem of the present invention is that when manufacturing an absorbent body using a filament aggregate obtained by opening a tow, certain performances such as basis weight, thickness, elasticity, density, rigidity, etc. are automatically obtained. It is to be able to design freely.

Means for solving the problem

The present invention that has solved the above problems is as follows.

In an absorbent article provided with an absorber that absorbs excreta,

The absorbent article includes a plurality of filament aggregate parts formed by opening a tow.

[0011] (Function and effect)

As described above, when an absorbent body is formed using a plurality of filament aggregate parts formed by tow opening, depending on the part of the absorbent body, the opened state of each filament aggregate part may be different. In addition, it is possible to use tows with different properties for each filament assembly part, so that the opening weight of the absorbent body, thickness, elasticity, density, rigidity, etc. can be freely controlled regardless of the raw material. To be able to design.

<Invention of Claim 2> The absorbent article according to claim 1, wherein the plurality of filament aggregate parts are laminated in a thickness direction of the article.

[0013] (Function and effect)

By adopting such a laminated structure, the performance of each part in the thickness direction of the article can be freely designed.

3. The absorbent article according to claim 2, comprising a layer of a filament aggregate part containing a superabsorbent polymer and a layer of a filament aggregate part not containing a superabsorbent polymer.

[0015] (Function and effect)

When configured in this manner, a sufficient amount of absorption is secured by the layer of the filament aggregate part including the superabsorbent polymer, and the filament aggregate part layer not including the superabsorbent polymer ensures the filament. Due to the excellent liquid diffusibility inherent in the aggregate, the liquid content of the excreta will diffuse more widely.

4. The absorbent article according to claim 2, wherein a nonwoven fabric is sandwiched at least at one location between the overlapping filament assembly portions.

[0017] (Function and effect)

As described above, when the nonwoven fabric is sandwiched between the overlapping filament aggregate portions, the strength and stiffness can be improved by the nonwoven fabric. In addition, when the superabsorbent polymer particles are held in the filament aggregate part so as to be movable, the non-woven fabric can block the movement of the superabsorbent polymer particles, and can be high when the outer surface of the product is touched by hand. It is possible to reduce the crisp and uncomfortable feeling caused by the unevenness of the absorbent polymer particles.

The absorbent article according to claim 1, wherein the plurality of filament aggregate parts are arranged in parallel in the width direction of the article.

[0019] (Function and effect)

By adopting such a side-by-side structure, the performance of each part in the width direction of the article is automatically achieved. It becomes possible to design freely.

[0020] <Invention of Claim 6>

The absorbent article according to any one of claims 1 to 5, wherein a plurality of types of tows having different properties are used as the plurality of tows.

[0021] (Function and effect)

By using tows with different properties in this way, it becomes possible to individually and freely design certain performances such as the basis weight, thickness, elasticity, density, and rigidity of the absorber, and in the case of using a single tow Impossible performance can be demonstrated.

The absorbent article according to any one of claims 1 to 6, wherein the plurality of filament aggregate portions differ in at least one of basis weight, thickness, elasticity, density, rigidity, and hydrophilicity.

[0023] (Function and effect)

It is preferred that these properties be different if the performance is to be improved over using a single tow.

A method for manufacturing a absorbent body using a filament aggregate formed by opening a tow,

In the opening, a plurality of tows are individually opened to form a plurality of filament assemblies, and then a plurality of filament assemblies are assembled and arranged to produce a single absorbent body. Absorber manufacturing method.

[0025] (Function and effect)

In this way, when a plurality of tows are individually opened, and a plurality of filament assemblies obtained are assembled and arranged to produce a single absorbent body, the spread is made according to the location of the absorbent body. Since it is possible to use different conditions and tow with different properties, it is possible to freely adjust the weight, thickness, elasticity, density, rigidity, etc. of the absorbent body regardless of the raw material. It comes to be designed by.

When individually opening the plurality of tows, the opening state of at least two tows The method for producing an absorbent body according to claim 8, wherein

[0027] (Function and effect)

In this way, the basis weight, thickness, elasticity, and density of the absorber can be improved by differentiating the spread state (that is, the degree of spread or the distribution of filament aggregates before and after opening in the plane and cross-sectional directions). In addition, it becomes possible to design specific performance such as rigidity individually and freely.

[0028] <Invention of Claim 10>

10. The absorbent body manufacturing method according to claim 8, wherein the plurality of filament aggregates are stacked in the thickness direction of the article when the assembly is arranged.

[0029] (Function and effect)

By adopting such a laminated structure, the performance in each part in the thickness direction can be freely designed.

The absorbent body manufacturing method according to any one of claims 8 to: LO, wherein the plurality of filament aggregates are juxtaposed in a surface direction perpendicular to the thickness direction of the article in the assembly arrangement.

[0031] (Function and effect)

By adopting such a side-by-side structure, the performance of each part in the surface direction can be freely designed.

When the fiber is opened, compressed air is blown into the passage while passing the plurality of tows through a single passage, and the plurality of tows are collectively opened to form an integral filament aggregate. Absorber manufacturing method.

[0033] (Function and effect)

When producing a composite absorbent element using a plurality of tows as raw materials, after opening the plurality of tows individually, the resulting filament assembly is composited by lamination or the like to form a single composite absorbent element. It is simple. However, what is obtained in this way is a filament assembly There is a risk of separation or misalignment after poor integration.

[0034] On the other hand, as described in this section, when a plurality of tows are spread together, the filaments of adjacent tows increase as the distance between the filaments of each tow increases and the bulk increases. Are intertwined with each other to form an integral filament assembly. According to the present invention, a filament assembly that is firmly integrated can be easily manufactured using a plurality of tows as raw materials while maintaining the continuity of the filament without adding a special process.

13. The method for manufacturing an absorbent body according to claim 12, wherein a plurality of tows are collectively sandwiched between single rolls on the entry side of the passage, and adjacent tows are pressed against each other.

[0036] (Function and effect)

In this way, prior to opening the fibers, the adjacent tows are pressed against each other with a -roll, so that a plurality of tows can be collected in advance, and the introduction into the passage becomes smooth and the adjacent tows The filament becomes more easily entangled.

[0037] <Invention of Claim 14>

The absorbent body manufacturing method according to any one of claims 8 to 13, wherein a plurality of types of tows having different properties are used as the plurality of tows.

[0038] (Function and effect)

By combining the tows with different properties in this way, it is possible to exhibit an absorption flaw that is impossible with a single material.

15. The absorbent body manufacturing method according to claim 8, wherein at least one of the plurality of filament aggregates is different in basis weight, thickness, elasticity, density, and rigidity.

[0040] (Function and effect)

By manufacturing as described in this section, it is possible to manufacture absorbers that are partially different in at least one of basis weight, thickness, elasticity, density, and rigidity.

The invention's effect

[0041] As described above, according to the present invention, when manufacturing an absorbent body using a filament aggregate obtained by opening a tow, certain performances such as basis weight, thickness, elasticity, density, and rigidity are obtained. Self Advantages such as being able to design freely.

BEST MODE FOR CARRYING OUT THE INVENTION

[0042] Hereinafter, an embodiment of the present invention will be described in detail with reference to a disposable diaper and its manufacturing equipment.

<Pants-type use, example of a disposable diaper>

Figure 1 shows an example of a pants-type disposable diaper. The pants-type disposable diaper 10 includes an outer surface (back surface) side exterior sheet 12 and an inner surface (front surface) side absorbent body 20, and the absorbent body 20 is fixed to the exterior sheet 12. The absorbent main body 20 is a portion that receives and absorbs and retains body fluids such as urine and loose stool (menstrual blood in a sanitary napkin described later). The exterior sheet 12 is a part for attaching to the wearer.

[0043] The exterior sheet 12 has, for example, an hourglass shape as shown in the figure, and both sides are constricted, and this is a part into which the wearer's leg is inserted. The absorbent body 20 can take any shape, but is rectangular in the illustrated form.

As shown in FIG. 2, the exterior sheet 12 is folded back and forth after the absorbent main body 20 is installed and fixed at a predetermined position, and both sides of the front body 12F and the back body 12B of the exterior sheet 12 The joining region 12A is joined by heat fusion or the like. Thus, a pants-type disposable diaper having the structure shown in FIG. 1 and having a waist opening WO and a pair of redder openings LO can be obtained.

[0045] An intermediate width in the longitudinal direction of the absorbent main body 20 shown in the drawing (that is, the vertical direction in Fig. 2 and also in the longitudinal direction of the product) is shorter than the width connecting the constricted portions of the exterior sheet 12. ing. This width relationship may be reversed or the same width.

[0046] The exterior sheet 12 is preferably composed of two sheets of, for example, a water-repellent nonwoven fabric, and an elastic elastic member is interposed between these sheets, and it is desirable to fit the wearer with the contraction force. As the elastic elastic member, thread rubber or elastic foam band can be used, but it is desirable to use a large number of thread rubbers. In the illustrated form, the rubber threads 12C, 12C,... Are continuously provided in the width direction in the waist region W, provided only on both sides in the waist region U, and provided in the crotch region L. Absent. The rubber thread 1 2C, 12C ... is provided in both the waist region W and the lower waist region U. Even if the contraction force of the 12C itself is weak, the product will fit the wearer in the lower waist region U as a whole.

[0047] (Absorbent body)

As shown in FIG. 3, the absorbent main body 20 according to the embodiment includes a top sheet 30 that has a force such as a nonwoven fabric that allows body fluid to permeate, an intermediate sheet (second sheet) 40, and an absorbent element 50. Further, a body fluid impermeable sheet (also called a back sheet) 70 having a force such as a plastic sheet is provided on the back side of the absorbent body 56. The exterior sheet 12 is provided on the back side of the body fluid impermeable sheet 70. In addition, it has barriers 60, 60 on both sides.

[0048] (Top sheet)

The top sheet 30 has a property of permeating body fluid. Therefore, the material of the top sheet 30 is sufficient if it exhibits this body fluid permeability, and examples thereof include a porous or non-porous nonwoven fabric and a porous plastic sheet. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cuvula, natural fibers such as cotton, and mixed fibers using two or more of them. Etc. can be illustrated. Further, the non-woven fabric may be manufactured by any kind of cage. Examples of processing methods include known methods such as the spunlace method, the spunbond method, the thermal bond method, the melt blown method, and the needle punch method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is a preferable processing method for determining bulkiness and softness.

[0049] The top sheet 30 may be a single sheet or a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

[0050] (Intermediate sheet)

In order to quickly transfer the body fluid that has passed through the top sheet 30 to the absorber, the top sheet An intermediate sheet 40, usually called a “second sheet”, can be provided, which has a higher body fluid permeation rate than 30. This intermediate sheet quickly transfers body fluid to the absorbent body to enhance the absorption performance of the absorbent body, preventing the “returning” phenomenon of the absorbed body fluid absorbed by the force from the absorbent body. It can always be in a dry state.

[0051] Examples of the intermediate sheet 40 include the same material as the top sheet 30, spun lace, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric and a spunbond nonwoven fabric are preferable.

[0052] The intermediate sheet (second sheet) 40 is interposed between the top sheet 30 and the covering sheet 58. As shown in FIG. 5, a configuration in which an intermediate sheet (second sheet) 40 is not provided can also be used.

[0053] The intermediate sheet 40 in the form shown in the figure is arranged in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the length of the absorbent body 56, or may be within a short length range centered on the region for receiving body fluid. A typical material for the intermediate sheet 40 is a non-woven fabric having excellent body fluid permeability.

[0054] (absorbing element)

The absorbent element 50 is composed of an absorbent body 56 having an aggregate of filaments 52, 52, and a superabsorbent polymer single particle 54, 54, which are opened tow, and at least the back and side surfaces of the absorbent body 56. And a covering sheet 58 to be wrapped. Further, a holding sheet 80 is provided between the absorbent body 56 and the rear surface side portion (lower portion) of the covering sheet 58.

[0055] (Absorber)

The absorbent body 56 is formed by an aggregate of filaments (substantially continuous long fibers) formed by opening a tow, and is characteristically a plurality of filament aggregate parts formed from separate tows. 52A, 52B.

[0056] In the absorbent body 56 of the present invention, the arrangement and the number of filament aggregate portions are not limited. Therefore, as shown in FIG. 3, the filament assembly portions 52A and 52B are arranged in two layers on the top and bottom in the thickness direction of the article, and the number of layers is changed to three layers 52A, 52C and 52B as shown in FIG. As shown in FIG. 7, three filament assembly portions 52D, 52E, and 52F are arranged side by side in the width direction of the article, or although not shown, the longitudinal direction and the oblique direction are orthogonal to the thickness direction. A plurality of filament aggregate portions can be arranged in parallel in the surface direction. It is also possible to combine lamination and parallel arrangement.

[0057] The widths of the filament assembly portions 52A and 52B may be the same, but when the plurality of filament assembly portions 52A and 52B are laminated, the filament assembly portions 52A and 52B The width of 52B can be made different. For example, in the case of a two-layer structure as shown in FIG. 3 and the like, although not shown, the width of the upper layer 52A can be made narrower than the width of the lower layer 52B.

[0058] The plurality of filament aggregate portions 52A and 52B can have different opening states with respect to at least two tows.

[0059] In addition, a plurality of the same type of tow may be used as the raw material of each filament assembly portion 52A, 52B, but it is preferable to use a plurality of types of tows having different properties. Different ones, those having different cross-sectional shapes, those having different degrees of acetylene, and those having different hydrophilicity can be used. When a plurality of types of tows having different properties are used, it is preferable to select the type of tow according to the site in the absorbent body 56. More specifically, in the form shown in FIG. 3, the lower layer portion 52B is made of a filament having excellent liquid holding performance, for example, a filament having a fineness of about 1 to 3 dtex, and the upper layer portion 52A is thicker than the lower layer portion 53B and diffuses liquid. One preferred form is composed of high-performance filaments, for example, filaments with a fineness of 4-6 dtex. In this case, the liquid supplied with the force on the side of the top sheet 30 spreads in the upper layer portion 52A, diffuses in the range, and is absorbed and held by the lower layer portion 52B.

[0060] Further, the filament assembly portions 52A and 52B can be made different in at least one of basis weight, thickness, elasticity, density, and rigidity by making the opened state and type different.

[0061] Adjacent filament assembly portions 52A, 52B are shown in the enlarged portion of FIG. 4 which can be simply stacked or aligned as shown in the enlarged portion of FIG. As described above, the filament 52a of one part 52A and the filament 52b of the other part 52B may be integrated together. In this case, the filaments 52a and 52b are intertwined with each other in the vicinity of the boundary portion of the two portions 52A and 52B, and a clear boundary does not occur. Further, the adjacent filament assembly parts 52A and 52B can be joined together by a joining means such as a hot melt adhesive or a heat seal. When using hot melt adhesive, When adhesive is concentrated on the seams of adjacent filament assembly parts 52A and 52B, the liquid content in the excretory part is blocked by the seams, so that the spread of liquid along the extending direction of the seams is promoted. become.

[0062] As shown in Fig. 6, it is also a preferred form to sandwich a nonwoven fabric 57 between adjacent filament assembly portions 52A, 52B. The code | symbol 57f represents the nonwoven fabric fiber. In this case, the nonwoven fabric 57 preferably has higher rigidity than the filament aggregate portions 52A and 52B. Specifically, it is preferable that the constituent fiber 57f has a fineness of about 2.0 to 6. Odtex, a basis weight of about 15 to 50 gZm ² and a thickness of about 0.2 to ^2. Omm. The type of non-woven fabric 57 is not particularly limited. However, the fibers are not bonded to each other as in the case of spunlace non-woven fabric and the like because they are easy to unite with the filament assembly parts 52A and 52B due to the entanglement of fibers. Those formed only by these are preferable.

[0063] Examples of the material of the filaments 52a and 52b include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, boractacamide, polyvinyl acetate, etc.) In particular, cellulose ester and cellulose are preferable.

[0064] As cellulose, cellulose derived from plants such as cotton, linter, and wood pulp, buttery cellulose, etc. can be used. Regenerated cellulose, which may be regenerated cellulose such as rayon, is spun. Also good.

[0065] Examples of cellulose esters that can be suitably used include organic acid esters such as cellulose acetate, cellulose butyrate, and cellulose propionate; cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, It is possible to use mixed acid esters such as cellulose nitrate acetate; and cellulose ester derivatives such as poly force prolataton graft cellulose cellulose ester. These cellulose esters can be used alone or in admixture of two or more. The viscosity average degree of polymerization of the cellulose ester is, for example, about 50 to 900, preferably about 200 to 800. The average substitution degree of the cellulose ester is, for example, about 1.5 to 3.0 (for example, 2 to 3).

[0066] The average degree of polymerization of the cellulose ester is, for example, 10 to 1000, preferably 50 to 900. The average substitution degree of the cellulose ester is, for example, about 1 to 3, preferably 1 to 2.15, and more preferably about 1.1 to 2.0. Can do. The average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.

[0067] As the cellulose ester, an organic acid ester (for example, an ester with an organic acid having about 2 to 4 carbon atoms), particularly cellulose acetate is suitable. The acetylation degree of cellulose acetate is often about 43 to 62%, but about 30 to 50% is particularly preferable because it is excellent in biodegradability. A particularly preferred cellulose ester is cellulose diacetate.

[0068] The filaments 52a and 52b may contain various additives such as a heat stabilizer, a colorant, an oil, a yield improver, a whiteness improver, and the like.

[0069] The fineness of the filaments 52a and 52b is, for example, 1 to 16 dtex, preferably 1 to: LOdtex, more preferably 1 to 5 dtex. The filaments 52a and 52b may be non-crimped fibers, but are preferably crimped fibers. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. When crimped fibers are used, a bulky and light absorbent body can be produced, and a highly integrated tow can be easily produced by entanglement between the fibers. The cross-sectional shape of the filaments 52a and 52b is not particularly limited. For example, the filaments 52a and 52b may be round, oval, irregular (eg, Y-shaped, X-shaped, I-shaped, R-shaped) or hollow. There may be. Filament cocoons are used, for example, in the form of tow (fiber bundles) formed by bundling about 3,000 to 1,000,000, preferably about 5, 000-1, 000,000 single fibers. The The fiber bundle is preferably formed by concentrating about 3,000 to 1,000,000 filaments.

[0070] Tow is weakly entangled between filaments, so the shape of the tow is maintained, the high-absorbent polymer particles are prevented from moving, the absorber is firm, the urine is prevented from spreading, etc. Alternatively, it is possible to use a binder or a hot-melt adhesive having an action of fusing. Examples of binders include triacetin, triethylene glycol diacetate, triethylene glycol dipropionate, dibutyl phthalate, and dimethoxyethylene. In addition to ester plasticizers such as ruphthalate and triethyl citrate, various types of resin adhesives, particularly thermoplastic resin can be used.

[0071] The thermoplastic resin used as a noinder or hot melt adhesive is a resin that exhibits an adhesive force upon melting and solidification, and includes a water-insoluble or poorly water-soluble resin and a water-soluble resin. Water-insoluble or poorly water-soluble coagulants and water-soluble coagulants can be used together as necessary.

[0072] Examples of the water-insoluble or poorly water-soluble resin include olefin-based homo- or copolymers such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-acetate butyl copolymer, poly-butyl acetate, and polymethacrylic acid. Acrylic resin such as methyl, methyl methacrylate-acrylic acid ester copolymer, copolymer of (meth) acrylic monomer and styrenic monomer, polyvinyl chloride, butyl acetate butyl copolymer, polystyrene Styrene polymers such as copolymers of styrene monomers and (meth) acrylic monomers, polyesters that may be modified, polyamides such as nylon 11, nylon 12, nylon 610, nylon 612, rosin derivatives ( For example, rosin ester), hydrocarbon resin (for example, terpene resin) Dicyclopentadiene 榭脂, petroleum 榭脂), such as hydrogen added hydrocarbon 榭脂 can be used. These thermoplastic rosins can be used singly or in combination.

[0073] The water-soluble rosin has various water-soluble polymers such as polybulal alcohol, polypyrrole pyrrolidone, polybull ether, bulll monomer, carboxyl group, sulfonic acid group or a salt thereof. Vinyl water-soluble resins such as copolymers with copolymerizable monomers, acrylic water-soluble resins, polyalkylene oxides, water-soluble polyesters, water-soluble polyamides, and the like can be used. These water-soluble coagulants can be used alone or in combination of two or more.

[0074] Various additives such as stabilizers such as antioxidants and ultraviolet absorbers, fillers, plasticizers, preservatives, and antifungal agents may be added to the thermoplastic resin.

[0075] Since the tow can be produced by a known method, it will not be described in detail. Cellulose diacetate tow bale that can be suitably used for the absorbent element 50 is commercially available from Cera-Izu Co., Ltd. Daicel Chemical Industries. Cellulose diacetate tow bale has a density of about 0.5 gZcm ³ and the total weight is 400-600 kg.

[0076] From this bale, the tow is peeled off and opened in a wide band shape so as to have a desired size and bulk. The opening width of the tow is arbitrary, and may be, for example, a width of 100 to 2000 mm, preferably about 100 to 300 mm, which is the width of the product absorber. In addition, the density of the absorber can be adjusted by adjusting the state of tow opening.

[0077] (Superabsorbent polymer particles)

Preferably, as shown in FIG. 3, superabsorbent polymer particles 54, 54. It is desirable that the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of the filaments 52, 52. This state of being dispersed substantially throughout the thickness direction is conceptually shown as an enlarged view of the main part of FIG.

[0078] If there are no or very few SAP particles in the upper, lower, and intermediate parts of the absorber 56, it cannot be said that "they are dispersed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper, lower, and / or middle portions of the filament aggregate in addition to the form“ uniformly ”distributed in the entire thickness direction. The force is still included in the upper, lower and middle parts. In addition, some SAP particles remain on the surface of the filaments 52, 52 ··· without entering the aggregate of filaments 52, 52 ···, and some SAP particles are aggregates of the filaments 52, 52 ···· Neither the form passing through the covering sheet 58 nor the form on the holding sheet 80 as shown in FIG. 6 is excluded.

[0079] When the superabsorbent polymer particles 54 are used, the type of the superabsorbent polymer particles 54 in each filament assembly portion 52A, 52B, the applied amount (including the case where the applied amount is zero), the dispersion mode, and the density Etc. can be determined individually, and all can be the same, or the type and amount of the superabsorbent polymer particles 54 in any one of the filament assembly parts 52A, 52B can be changed to the other filament assembly part 52A, You can also make it different from 52B. In particular, one of the filament aggregate portions (especially the lower layer 52B) contains a superabsorbent polymer, and the other filament aggregate portion layer (particularly the upper layer 52A) contains a superabsorbent polymer. I don't like it. Here, the superabsorbent polymer particles mean to include “powder” in addition to “particles”. The particle size of the high-absorbency polymer particles can be the same as that used in this type of absorbent article, and is desired to be 100-1000 / ζ πι, particularly 150-400 / ζ πι! / ヽ. As the material of the superabsorbent | 4 polymer particles, a force that can be used without particular limitation is preferred that has a water absorption of 60 gZg or more. Superabsorbent polymer particles include starch, cellulose, and synthetic polymers, such as starch acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and cross-linked sodium carboxymethyl cellulose. And acrylic acid (salt) polymers can be used. As the shape of the superabsorbent polymer particles, it is possible to use a particle having a shape that is usually used in a granular form.

[0081] As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversal is likely to occur in which the body fluid supplied into the absorbent body returns to the outside of the absorbent body.

[0082] As the superabsorbent polymer particles, those having a gel strength of lOOOPa or more are preferably used. Thereby, even if it is a case where it is set as a bulky absorber by using tow | toe, the stickiness after a bodily fluid absorption can be suppressed effectively.

[0083] The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber. Therefore, although it cannot be generally stated, it can be 50 to 350 gZm ² . By setting the polymer basis weight to 50 g / m ² or less, it is possible to prevent the light weight effect from being exerted by adopting a tuca-like filament aggregate depending on the polymer weight. If it exceeds 350gZm ² , the effect will saturate with force. Excessive superabsorbent polymer particles will give the above-mentioned crisp discomfort.

[0084] If necessary, the application density or application amount of the superabsorbent polymer particles can be adjusted in the plane direction of the absorbent body 56. For example, the amount of body fluid excreted can be spread more than other sites. When considering gender differences, men can increase the front spray density (quantity) and women can increase the central spray density (quantity). Further, in the planar direction of the absorber 56, a portion where no polymer exists locally (for example, in a spot shape) can be provided. [0085] If necessary, a plurality of superabsorbent polymer particles having different particle size distributions are prepared, and can be sequentially sprayed * projected in the thickness direction. For example, the superabsorbent polymer particle spraying means 90 described above are arranged at intervals in a plurality of lines, and the particle size distribution is first small! · By projecting, it is possible to distribute a small particle size distribution on the lower side in the absorber 56 and a large particle size distribution on the upper side. This form is effective for allowing the particles having a small particle size distribution to penetrate deeply into the aggregate of filaments.

[0086] The ratio between the superabsorbent polymer particles and the aggregate of filaments affects the absorption characteristics. The weight ratio in the planar area of 5 cm × 5 cm in the region directly receiving the bodily fluid in the absorbent body 56 is desirably 1 to 14, particularly 3 to 9, in particular, the superabsorbent polymer particle Z filament weight force.

[0087] (Combination of other absorbent materials)

[0088] As long as it has a plurality of filament aggregate parts, it is formed by stacking other known absorbent materials, for example, short fibers such as pulp and airlaid, and adding superabsorbent polymer particles as necessary. Short fiber absorbent materials can be combined.

[0089] (Absorber size'weight)

On the other hand, the size of the absorber 56 is preferably a plane projection area force of OOcm ² or more and a thickness of 1 to 10 mm, particularly 1 to 5 mm. When the size of the absorber is within this range, it is extremely advantageous for improving the resilience without increasing the weight, thickness and cost. Further, it is preferable that the weight of the absorber is 25 g or less, particularly 10 to 20 g. Absorber weight force S Within this range, the advantage of not using a special member becomes particularly significant.

[0091] (Compression characteristics of absorber)

[0092] The compression resilience RC of the absorber 56 is preferably 40 to 60%, particularly preferably 50 to 60%. Thereby, sufficient restoring property can be exhibited with the absorber itself.

[0093] Further, it is preferable that the compression energy WC of the absorbent body 56 is 4.0 to: LO. Ogf 'cmZcm ² , since it can be compressed compactly at the same level or higher than before when packaging. [0094] These compression characteristics can be adjusted by adjusting the filament density by opening or the like, selecting the filament material, selecting the type of binder such as a plasticizer, adjusting the degree of processing, or a combination thereof.

[0095] Here, the compression energy (WC) is the amount of energy consumed when the center part of a test piece (holding sheet) cut to a length of 200 mm and a width of 50 mm is pressed to 50 g.

[0096] This compression energy can be measured by a handy compression tester (KES-G5, manufactured by Kato Tech Co., Ltd.). The measurement conditions for this tester are: SENS: 2, force gauge type: lkg, SPEED RANGE: STD, DEF sensitivity: 20, pressurization area: 2 cm ² , loading interval: 0.1 (standard), STROKE SET: 5.0, upper limit load: 50 gfZcm ²

On the other hand, the compression resilience (RC) is a parameter representing the recoverability at the time of compression. Therefore, if resiliency is good, compression resilience increases. This compression resilience can be measured with a handy compression tester (KES-G5, manufactured by Kato Tech). The measurement conditions in the case of this tester are the same as in the case of the compression energy.

[0098] (Enveloping sheet)

[0099] As the covering sheet 58, a tissue pen, particularly a crepe paper, a nonwoven fabric, a polylaminated nonwoven fabric, a sheet having small holes, or the like can be used. However, it is desirable that the sheet does not allow the superabsorbent polymer particles to escape. When using non-woven fabrics instead of crepe paper, hydrophilic SMMS (spunbond Z meltblown Z meltblown Z spunbond) non-woven fabrics are particularly suitable, and materials such as polypropylene and polyethylene Zpolypropylene can be used. The basis weight is preferably 5 to 50 g / m ² , particularly 10 to 30 g / m ² .

[0100] As shown in Fig. 3, this covering sheet 58 has a form that wraps the entire layer of the aggregates of filaments 52, 52 ... and superabsorbent polymer particles 54, 54 ... As shown, it may cover only the back and side surfaces of the layer. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with a crepe paper nonwoven fabric and the lower surface is covered with a body fluid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with a crepe paper nonwoven fabric and the side surfaces are covered. In addition, the bottom surface may be covered with a body fluid impermeable sheet such as polyethylene (each of these materials is a constituent element of the enveloping sheet). If necessary, arrange the aggregate of filaments 52, 52 ... and the layer of superabsorbent polymer particles 54, 54 ... However, it is difficult to prevent the movement of the superabsorbent polymer particles, so this is not the desired form.

[0101] (holding sheet)

[0102] The superabsorbent polymer particles 54 can be interposed between the holding sheet 80 and the absorber 56, for example, by spraying. The superabsorbent polymer particles 54 may pass through the aggregate of filaments 52 at the time of spraying / projecting the filament 52 or during the subsequent process or until the consumer uses it. The unevenness of the superabsorbent polymer particles that have passed through the filament aggregate gives a crisp and uncomfortable feeling when touched by the consumer when using it. Therefore, the holding sheet 80 having the holding performance of the absorbent polymer is interposed between the absorbent body 56 and the covering sheet 58. The holding sheet 80 is not sufficient only with the covering sheet 58 such as a tissue paper (crepe paper), but reinforces the stiffness and reduces or prevents a sense of incongruity when touched by the hand when the consumer uses it.

[0103] FIG. 6 shows that when the superabsorbent polymer particles 54 are provided below the absorber 56, or the superabsorbent polymer particles 54 contained in the absorber 56 are changed from the manufacturing to the consumer. In the stage up to use, the aggregate force of the filaments 52 is also released and gathered on the holding sheet 80 conceptually.

[0104] The material of the holding sheet 80 is not particularly limited as long as it has a holding performance of the superabsorbent polymer particles 54. Specifically, for example, non-woven fabric, crimped pulp, low-absorbency cotton fiber (for example, non-degreased cotton fiber, degreased cotton fiber, rayon fiber treated with a water repellent or a hydrophobizing agent, etc.). ), Polyethylene fiber, polyester fiber, acrylic fiber, polypropylene fiber, silk, cotton, hemp, nylon, polyurethane, acetate fiber, airlaid (mixed with superabsorbent polymer particles) sheet, and the like.

[0105] When the holding sheet 80 is a non-woven fabric, the holding sheet 80 has a compressive energy force based on the KES test SO. 01 to: LO. OOgfcm / cm ² , preferably 0.01 to 1. OOgfcm / cm ² And a compression resilience of 10 to 100%, preferably 70 to 100%.

[0106] The reason for providing the holding sheet 80 is to hold, for example, the superabsorbent polymer particles 54 that have been pulled down (extracted) from the absorber 56, as mentioned above. Therefore, Since the exposed superabsorbent polymer particles 54 come into contact with the user via the covering sheet 58 and the holding sheet 80, there is no fear that it will be transmitted to the user as a sense of incongruity. In particular, the non-woven fabric having the above-described compression energy and compression resilience sufficiently exhibits the holding function.

[0107] Further, since the superabsorbent polymer particles 54 that have escaped are held by the holding sheet 80 and do not move on the covering sheet 58, there is no possibility of uneven absorption capacity. In particular, in order to prevent the superabsorbent polymer particles 54 from moving on the holding sheet 80, an adhesive hot melt adhesive or the like can be applied on the holding sheet 80 in advance. Also, by making the upper surface of the holding sheet 80 (the surface facing the use surface side) rough, the superabsorbent polymer particles 54 may be prevented from moving on the holding sheet 80. As roughening or fluffing means for this purpose, non-net surface that is not the net surface at the time of manufacturing the nonwoven fabric, marble force check, processing by needle punch, brushing check, etc. can be mentioned. Can do.

[0108] The holding sheet 80 may be provided only below the absorber 56 as shown in FIG. 3 or the like, or may be wound up to the upper surface of the absorber 56 through the side surface of the absorber 56 as shown in FIG. It may be extended. It is also possible to use a plurality of holding sheets 80 in a stacked manner.

[0109] In the above example, the holding sheet 80 is an example in which the holding sheet 80 is provided between the absorber 56 and the back surface side portion of the covering sheet 58. (The form is not shown in the figure.) In short, if the holding sheet 80 is provided on the back side of the absorbent body 56, it is possible to reduce or not cause a crisp discomfort when touching the back surface of the product. .

[0110] (Bore impermeable sheet)

The body fluid impermeable sheet 70 is simply a sheet disposed on the back side of the absorber 56, and in the present embodiment, it is a sheet in which the absorber 56 is interposed between the top sheet 30. Therefore, the material of the main body liquid-impermeable sheet is not particularly limited. Specifically, for example, polyolefin resin such as polyethylene and polypropylene, laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, and a nonwoven fabric that is substantially impervious to liquid by interposing a waterproof film (in this case The body with waterproof film and nonwoven fabric A liquid-impermeable sheet is constructed. ) And the like. Of course, in addition to this, a liquid-impervious and moisture-permeable material that has been preferred in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin-based resin such as polyethylene or polypropylene, and the sheet is formed, and then uniaxially or biaxially. A microporous sheet obtained by stretching can be exemplified.

[0111] The body fluid impervious sheet 70 extends to the use surface in a so-called framed form (not shown), thereby preventing the body fluid from leaking sideways. This is prevented by interposing the second body fluid impermeable sheet 72 between the double barrier sheets 64 forming the noir cuff 60. According to this configuration, the second body fluid impermeable sheet 72 extends until the Norriya cuff 60 is erected! /. There is also an advantage that side leakage of loose stools between 60 can be prevented.

[0112] (Barrier first effort)

[0113] Barrier force hoops 60, 60 provided on both sides of the product are provided to prevent urine and soft stool that move laterally along the top sheet 30 and prevent side leakage. This is an additional element.

[0114] The illustrated non-cuff cuff 60 is a doubled water-repellent nonwoven fabric sheet, and covers the folded portion of the absorbent body 56 from the back side to the lower side of the top sheet 30 and protrudes to the front side. Is formed. In order to prevent urine from moving on the top sheet 30 in the lateral direction, the side part of the body fluid-impermeable sheet 70 is inserted between the double nonwoven fabric sheets, and the barrier force that protrudes to the surface side It extends halfway through Hus 60.

[0115] Further, the shape of the barrier first force hose 60 itself can be appropriately designed. In the example shown in the drawing, an elastic elastic member, for example, rubber thread 62 is stretched at the tip and middle of the protruding portion of the barrier cuff 60. The cuffs 60 are erected by the contraction force during use. The middle part of rubber thread 62 in the middle is positioned on the center side of thread rubbers 62 and 62 at the front end and fixed to the front and rear ends of topsheet 30. The side stands up diagonally with the direction toward the center, and the tip is inclined outward from the middle. It becomes a form to stand up.

[0116] (Embossed)

[0117] A recess E by embossing may be formed in the thickness direction from the surface side of the top sheet 30. In this case, the embossed recess E is formed only on the top sheet 30, and the embossed recess E is formed on both the top sheet 30 and the intermediate sheet 40 as shown in FIG. An embossed recess may be formed (not shown) so as to reach a part of the absorbent body 56 in the thickness direction or substantially the whole from the surface side. In order to form recesses E by embossing on both the top sheet 30 and the intermediate sheet 40, the intermediate sheet 40 has a basis weight of 5 to 50 gZm ² , a thickness of 0.2 to 1.5 mm, and a top sheet. No. 30 is desirable in terms of sufficient embossing force on the condition that the basis weight is 15 to 80gZm ² and the thickness is in the range of 0.2 to 3.5mm without impairing liquid permeability! / ,.

[0118] Further, only the intermediate sheet 40 without forming a recess in the top sheet 30 may be formed with an embossed recess, and the top sheet 30 and the intermediate sheet 40 may be further formed with a recess. A concave portion by embossing may be formed only in 56, or a concave portion by embossing may be formed only in the absorbent body 58 without forming concave portions in the top sheet 30, the intermediate sheet 40 and the covering sheet 58.

[0119] The recess E has an effect of inducing and diffusing body fluid in the extending direction. Therefore, when the concave portion E is substantially continuous in a groove shape (including the case where a plurality of concave portions are arranged at intervals to form a single groove), the body fluid is moved to the surface side before reaching the absorber. It will diffuse through the recesses E in the layer, allowing a wider part of the absorber to be used for absorption. As a result, the absorbent capacity of the entire product increases, and the absorbent article is less prone to side leakage and reversal due to insufficient absorbent capacity.

[0120] On the other hand, the absorber 56 made of tow tends to be less rigid than the conventional pulp material, but it is preferable to form a recess by embossing in the absorber 56 because the rigidity can be increased. Although not shown, in order to increase the rigidity of the absorbent element 50, it is also a preferred form to form a concave portion by embossing in the thickness direction from the back surface side (the side opposite to the top sheet 30 side) of the absorbent body 56. In order to form the concave portion on the back surface side, the holding sheet 80, the covering sheet 58, the body fluid-impermeable sheet 70, or the exterior sheet 12 may reach the absorber 56 from the back surface side. Embossing force can be applied integrally. Further, such a recess on the back surface side is preferably formed together with the recess E on the front surface side, but only the recess on the back surface side can be formed without forming the recess E on the front surface side. When the recesses are provided on both the front and back sides, the shape of the recesses may be common to the front and back sides, or may be different from each other.

[0121] The concave portion formed by embossing has an effect of inducing and diffusing body fluid in the extending direction. It also has the effect of increasing rigidity. Therefore, it is desirable that the shape of the embossed recess be determined in consideration of these effects. For example, the recesses are substantially continuous in a groove shape (including the case where a plurality of recesses are arranged in a row and form a single groove), and a plurality of recesses are arranged in a dot-like manner at intervals. It may be. In addition, as the planar pattern, groove-like or dot-like concave portions are arranged in the product longitudinal direction, width direction, a combination of these, a zigzag shape that reciprocates in the width direction (staggered shape), or irregularly. Can be used. Furthermore, appropriate forms such as a pin shape, a Mt. Fuji shape, and a bellows shape can be adopted.

[0122] (Others)

[0123] Although not shown, the constituent members of the absorbent main body 20 are fixed to each other by an appropriate application form such as a solid such as a hot-melt adhesive, a bead or a spiral application.

[0124] (Example of disposable disposable diapers)

On the other hand, FIGS. 8 and 9 show examples of tape-type disposable diapers. FIG. 9 is a slightly exaggerated illustration of the force-absorbing body 20 shown in FIG.

[0126] The tape-type disposable diaper 10A has fastening pieces attached to both ends of the back side of the diaper, has a hook element on the fastening surface of the fastening piece, and constitutes the back side of the diaper. A diaper in which a backsheet is a non-woven laminate, and the hook element of the fastening piece can be engaged with an arbitrary portion of the surface of the backsheet when the diaper is mounted.

[0127] The absorbent main body 20 has an absorbent body 56 interposed between a top sheet 30 and a body fluid impermeable sheet 70. The absorbent body 56 is entirely wrapped with a covering sheet 58 made of tissue paper, and has a rectangular shape in plan view. A holding sheet 80 is provided between the absorbent body 56 and the covering sheet 58. [0128] Further, an intermediate sheet 40 is interposed between the top sheet 30 and the absorber 56. The body fluid impermeable sheet 70 is formed in a rectangular shape wider than the absorbent body 56, and a back sheet 12A having an hourglass-shaped non-woven fabric force is provided on the outside of the sheet.

The top sheet 30 has a rectangular shape wider than the absorbent body 56, extends slightly outward from the side edge of the absorbent body 56, and is fixed to the body fluid impermeable sheet 70 with a hot melt adhesive or the like.

[0130] On both sides of the diaper, a barrier force hose 60A that protrudes toward the use surface is formed. This noir cuff 60A has a non-woven sheet 64 that also has a non-woven fabric force substantially continuous in the width direction, and an elastic expansion and contraction. It is composed of a member, for example, one or a plurality of leg rubber elastic elastic members for the leg elastic force. 130 is a fasting piece with a hook-and-loop fastener.

[0131] The inner surface of the liner sheet 64 has a fixing start at a position spaced from the side edge of the top sheet 30, and the fixing start edge also extends to the extending edge of the body fluid impermeable sheet 70 outward in the width direction. The part is fixed by a hot melt adhesive or the like. The outer surface of the liner sheet 64 is fixed to the back sheet 12A on the lower surface thereof by a hot melt adhesive or the like. In addition, an elastic elastic member for gasket cuffs, for example, thread rubber 66 is provided.

[0132] The starting end of the inner surface of the liner sheet 64 fixed to the body fluid impermeable sheet 70 forms an upstanding end of the barrier one-force hose 60A. Around the leg, the inside of the standing end is a free part that is not fixed to the product body, and this free part comes to stand by the contraction force of the rubber thread 62.

[0133] In this example, by using a hook-and-loop fastener as the fastening piece 130, it can be mechanically fixed to the back sheet 12A. Therefore, the so-called target tape can be omitted, and the fastening position by the fastening piece 130 can be freely selected.

[0134] In the fastening piece 130, a base portion of a fastening base material such as plastic, polylaminated nonwoven fabric, or paper is joined to the back sheet 12A, for example, with an adhesive, and has a hook element 130A on the tip side. The hook element 130A is bonded to the fastening substrate with an adhesive. The hook element 130A has a large number of engaging pieces on the outer surface side thereof. A temporary fixing adhesive portion 130B is provided on the tip side from the hook element 130A. At the end of product assembly, the temporary adhesive section 130B is bonded to the force barrier sheet 64 to fasten the fastening section 130. The end side peeling is prevented. In use, it peels off against the adhesive force and brings the front end of the fastening piece 130 to the front body. The fastening base material is exposed at the tip side from the temporary fixing adhesive portion 130B, and is a tab portion.

[0135] A target printing sheet 74 as a design sheet is provided on the inner surface side of the knock sheet 12A on the opening side of the front body, and serves as a guide for fixing the hook element 130A of the fastening piece 130. The target print with the design is made and the back sheet is externally applied.

It is given to be visible through A.

[0136] When the diaper is worn, the diaper is attached to the body in the shape of a boat, and the contraction force of the rubber thread 62 acts on the leg. To do.

[0137] The space surrounded by the standing part forms a confined space for urine or soft stool. When urinating into this space, the urine is absorbed into the absorbent body 56 through the top sheet 30 and the rising part of the Noriya cuff 60A becomes the barrier for the stool solids. Is prevented. In the unlikely event that urine leaks laterally across the standing distal edge of the standing part, side leakage is prevented by a stop function by the flat contact part.

[0138] In the present embodiment, it is desirable that the liner sheet 64 forming each standing cuff is not liquid-permeable but substantially liquid-permeable (or semi-liquid-permeable). Further, the surface sheet (nonwoven fabric laminate) of the present invention may have a property of repelling liquid by silicon treatment or the like. In any case, the noir sheet 64 and the back sheet 12A are air permeable, and the barrier sheet 64 and the back sheet 12A each have a hydrostatic pressure of lOOmmH.

A sheet of 2 o or more is preferable. As a result, air permeability is exhibited at the side portion in the width direction of the product, and the wearer's stuffiness can be prevented.

[0139] Other points, such as the materials used in each part, are the same as in the case of the above-described pants-type disposable diaper, so the description will be omitted.

[0140] <Example of how to make disposable diapers>

Next, a manufacturing example of the above-described paper diaper will be described.

(In the case of pants-type diapers)

The example shown in FIG. 10 and FIG. 11 is the pants-type disposable diaper shown in FIG. 1, FIG. 2 and FIG. An example of manufacturing equipment is shown.

[0141] The covering sheet 58 is supplied to the line from the upstream side, and then the holding sheet 80 is supplied.

In order to prevent the movement of the superabsorbent polymer particles supplied later, a sticky hot melt adhesive or the like can be applied to the holding sheet 80 in advance. FIG. 11 shows an adhesive applicator 104 for this purpose.

[0142] Subsequently, the filament aggregate 52Z formed by opening the tow (details will be described later) is also supplied with an upward force. Particles 54 are distributed and supplied. Thereafter, the wrapping sheet 58 is wrapped by passing the sailor 92, and the absorbent element 50 is obtained. Next, it is divided in the line direction by the cutter device 94 to form individual absorbent elements 50.

Further, since the intermediate sheet (second sheet) 40 has a structure that is short with respect to the entire length of the absorbent element 50 in the embodiment, it is supplied intermittently from above.

[0144] Subsequently, the components of the NORY cuff 60 and the top sheet 30 force are supplied from above from the lower side, respectively. Here, in the supply line of the barrier sheet 64 constituting the NORY cuff 60, the thread rubber 62 is stretched between the two nonwoven fabrics and the second bodily fluid impermeable sheet 72 is fixed in advance by a device (not shown). Is supplied to the main line together with the top sheet 30. The components of the barrier cuff 60 supplied to the main line, the top sheet 30 and the body fluid impermeable sheet 70 are folded into a shape shown in FIG.

[0145] At the end of the line of the absorbent main body 20, it is cut by the cutter device 98 to obtain a rectangular absorbent main body 20 whose longitudinal direction is along the line. The obtained absorbent main body 20 is turned 90 degrees by the turning device 100 so that the longitudinal direction of the absorbent main body 20 is orthogonal to the line.

[0146] On the other hand, in the line of the exterior sheet 12, the thread rubber 12C flows in advance between the two nonwoven fabric sheets (not shown in FIG. 10), and the leg periphery is formed. For this purpose, it is cut into an oval shape by a cutter (not shown), and when the combination station 102 is reached, the absorbent main body 20 that has been turned around is installed between the cut-out portions, and hot melt adhesive, etc. And fixed to the outer sheet 12. Then the horizontal in Figure 10 It is folded up and down with the line as a boundary, and the joining regions 12A on both sides of the front body 12F and the back body 12B of the exterior sheet 12 are joined by heat fusion or the like. Thereafter, the product is divided in the line direction (the dividing means are not shown) to obtain individual products.

[0147] (First form of opening process)

The opening process can be performed by a line having the form shown in FIG. 11, for example. That is, according to the number of filament aggregate parts (two in the illustrated example) provided in a single absorbent body, the opening lines LI and L2 are individually provided, and the tow 52Y is individually opened in each line LI and L2. Each filament assembly 52Z is arranged in a predetermined arrangement (in the illustrated example, the upper and lower layers are arranged, but they may be juxtaposed in the CD direction or a combination thereof. After that, the superabsorbent polymer particles 54 are sprayed and supplied by the superabsorbent polymer particle spraying means 90, and sent to the sailer 92 after being forced. These filament aggregates 52Z become filament aggregate portions 52A and 52B in the above-described absorber 56, respectively.

[0148] The tows 52Y of the lines LI and L2 may be the same or may have different types such as fineness. In addition, the degree of opening in each line LI, L2 can be set individually, and the force can be made to be the same level. By these, at least one of the basis weight, thickness, elasticity, density, and rigidity of the obtained filament aggregate 52Z (filament aggregate portions 52A and 52B) can be made different.

[0149] In more detail, in each opening line LI, L2, the toe 52Y is pulled out from the bale 52X and, if necessary, the first-up 126A, while being gradually widened through the widening device 120, It passes through the second 2-up 126B and the third 3-up 126C and is led to the thickening device 110.

[0150] The tow is pulled out of the bale 52X by pulling in with the 1st-up 126A (corresponding to the drive-up roll). Characteristically, the tow 52Y pulled out from the bale 52X is changed in angle by the turn part 122, and then the two parts of the free nip trolley 124 consisting of a pair of nip knolls configured to rotate freely. Through the first nip 12 6A. In such a configuration, the force applied by the transfer resistance of the free-up roll 124 (determined according to the two-up pressure and the roll's own weight) also functions as a brake that suppresses the pull-in speed of the toe 52Y. Tension is Become stable. This is due to the fact that the rotation of the free-up roll 124 occurs only when the tow passes. As a result, the size, weight and quality of the absorber are stabilized.

[0151] The free-roll of the free-roll 124 may be determined appropriately. However, in normal cases, it is preferable that the double-roll pressure is greater than OMPa and less than 1 OMPa. It is preferable that the amount be more than Okg and less than 10kg. Within this range, tension can be easily stabilized.

[0152] In addition, the tow 52Y drawn from the bale 52X is placed between the bale 52X and the free-up roll 124, between the free-up roll 124 and the first-up 126A, and between the first-up 126A and the first. The widening device 120 provided between the 2-p 126B and between the 2-p 126B and the 3-p 126C is widened stepwise to a desired width. At this time, it can also be expanded in the thickness direction.

12 and 13 show an example 120 of the widening device. The widening device 120 includes a rectangular tube passage 120A having a predetermined width X through which the tow 52Y passes, and a compressed air jet outlet 120B formed on a surface along the width direction on the inner surface of the passage 120A. The tow 52Y to be introduced is widened to the full width of the passage by the force of compressed air. The height of the passage is set to be equal to or greater than the thickness of the tow 52Y to be introduced, and when it is higher than the thickness of the tow 52Y, the toe 52Y is also expanded in the thickness direction.

[0154] As shown in FIG. 13, the spout 120B is line-symmetric with respect to the center in the width direction of the passage 120A, and is located in a dogleg shape that is located downstream in the toe passage direction toward the center in the width direction of the passage 120A. (Or V-shaped) It is a slit.

[0155] When the tow enters the passage 120A in such a state that the slit 120B force is also ejected, the tow 52Y receives the force of the compressed air in a balanced manner even if the approach position is shifted in the center force in the width direction. Thus, it escapes to the center in the width direction (in the direction of the arrow in FIG. 13), and the tow 52Y is naturally guided to the center in the width direction of the passage 120A. In other words, the introduction position of the toe 52Y can be centered using compressed air for widening. Further, in this embodiment, since the toe 52Y is guided in a non-contact manner, there is an advantage that damage and collapse of the tow are less likely to occur compared to the case where the toe 52Y is guided by contact. Also, this kind of centering function The widening device 120 has not only centering in widening but also a function of correcting the transfer position.

[0156] When performing centering using compressed air as described above, the shape of the slit is not limited to the square shape, and is symmetrical with respect to the center in the width direction of the passage 120A and toward the center in the width direction of the passage 120A. As long as the conditions located downstream in the toe passage direction are satisfied, it may be formed in a curved shape, an arc shape, or the like.

[0157] On the other hand, tension is applied between the 1st-up 126A and the 2nd-up 126B so as to apply tension to the tow 52Y. The peripheral speed of each -up roll is set so as to be relaxed between As a result, tension is applied to the tow 52Y between the first-up 126A and the second-up 126B, so that the entanglement between the filaments is forcibly removed to some extent and the separation of the filaments is promoted. At the same time, the tow 52Y is widened by the widening device 120 along with the separation, so that the tow 52Y can be further uniformly widened. In addition, the toe 52Y is widened by the widening device 120 while the tow 52Y is relaxed between the 2-up 126B and the 3-up 126C. It has become. The open state in this part can be changed mainly by changing the tension.

[0158] In a more preferred form, one roller of the second 2-p 126B is formed with a large number of continuous grooves in the circumferential direction at small intervals in the longitudinal direction. This groove has the function of promoting tow unraveling by allowing the filament to enter a large number of grooves. Further, in this case, in order to enhance the effect of the groove, the holding angle of the toe 52Y (the rotation direction angle of the toe contact portion) in one of the grooved rollers of the 2-up 126B is increased, and the toe 52Y and the grooved roller are increased. It is also a preferable form to increase the contact area. Specifically, the angle between the tow 52Y on the upstream side of the 2-p 126B and the tow 52Y on the downstream side, that is, the direction change angle by the grooved roller is less than 180 degrees, especially acute angle (smaller than 90 degrees) It is preferable to constitute such that The opening state changes depending on the use of this grooved roller.

[0159] In addition, the first-up 126A, the second-up 126B, and the third-up 126C may have different combinations of roll diameters, but in that case, depending on the peripheral speed difference. Force applied to toe 5 2Y between rolls, contact resistance between roll and tow 52Y, etc. Uneven in the toe width direction It is preferable to make them all in common because there is a risk of becoming one.

[0160] Next, the tow 52Y that has passed through the 3-p 126C is guided to the thickening device 110. The thickening device 110 has a structure similar to that disclosed in, for example, Japanese Patent Laid-Open No. 59-500422 (WO 83/03267), and schematically shows an inlet 110A and an outlet as shown in FIG. A bench lily part 110b is formed between the air outlet 110b and a pressure air inlet 110a on the inlet side, and an air exhaust hole 110c in the bench lily part 110b. It is almost rectangular in shape, and is flat in a direction that penetrates the paper surface of FIG.

[0161] When the compressed air is blown from the blowing port 110a, air enters from the inlet 110A due to the ejector effect, and as a result, each tow 52Y is drawn into the passage and given a forward force. Each toe 52Y is exhausted from the air exhaust hole 110c at a position past the bench lily part 110b, and the space of the bench lily part 110b is expanded, so the bulk of the toe 52Y mainly increases in the thickness direction. And the thickness is increased. In addition, by making the width of the passage wider than the width of the tow 52Y to be introduced, the width can be increased as shown in the lower part of FIG. Also in the thickening device 110, the spread state can be changed mainly by changing the passage size, the amount of compressed air, the air distribution in the width direction, and the like.

[0162] (Second form of opening process)

15 and 16 show examples of production lines suitable for forming the absorber structure shown in FIG. That is, supply lines L1 and L2 are individually provided according to the number of tows to be combined (two in the example shown in the figure), and a plurality of tows 52Y supplied from each line LI and L2 are collectively introduced into the thickening device 110. The first embodiment is basically the same as the first embodiment except that the integral filament aggregate 52Z is formed. In the illustrated example, a plurality of tows 52Y are stacked one above the other, but they can be arranged in the CD direction or a combination thereof.

More specifically, the tows 52Y that have passed through the third 3-up 126C of the lines LI and L2 are collectively introduced into the thickening device 110 in a desired mutual arrangement such as being stacked up and down. When the compressed air is blown from the blowing port 110a, air also enters the inlet 110A due to the ejector effect, and as a result, each toe 52Y is drawn into the passage and given a forward force. When each toe 52Y reaches the bench lily part 110b, the air is exhausted from the air exhaust hole 110c, and the space of the bench lily part 110b is expanded, as shown in FIG. Increases in the thickness direction, and the thickness is increased. Note that widening is possible by making the width of the passage wider than the width of the tow 52 Y to be introduced. At this time, as the distance between the filaments 52 and 52 in each toe 52Y increases and the volume increases, the filaments 52 and 52 of adjacent tows 52 become entangled with each other to form an integral filament aggregate 52Z. It is done.

[0164] The plurality of tows 52Y supplied from the lines LI and L2 may pass through the passage of the thickening device 110 as they are. However, as shown in FIG. When 52Y is put together between a single-roll roll 126D and the adjacent tows 52Y are pressed together, a plurality of tows 52Y can be put together in advance to facilitate introduction into the passage and adjacent to each other. This is preferable because the filament of tow 52Y is more easily entangled.

[0165] (Third form of fiber opening process)

As shown in FIG. 6, when a non-woven fabric is sandwiched between adjacent filament assembly portions 52A and 52B, as shown in FIG. 19, in the second embodiment, a plurality of tows 52Y supplied from the lines LI and L2 are used. When these are collectively introduced into the thickening device 110, a non-woven fabric 57 that also feeds the roll force can be supplied and sandwiched between the tows 52Y (not shown). In this case, the bulk of the non-woven fabric 57 that consists of only a plurality of tows 52Y also increases due to the increase in the fiber spacing, and the filaments of the adjacent tow 52Y and the fibers of the non-woven fabric 57 are entangled with each other to form an integral filament aggregate 52Z. Is formed. In addition, as shown in FIG. 20, also in the first embodiment, when a plurality of filament aggregates 52Z individually opened and formed on each of the lines LI and L2 are assembled in a predetermined arrangement, a roll force (not shown) is also fed out. Nonwoven fabric 57 can be supplied and sandwiched between filament assemblies 52Z.

[0166] (Fourth form of opening process)

FIG. 21 shows a fourth embodiment. That is, as described in the first embodiment, this form is arranged as described in the second embodiment after arranging a plurality of filament assemblies 52Z individually opened in each line LI, L2, as described in the second embodiment. It is introduced into the thickening device 110 and integrated by blowing compressed air into the passage while passing the plurality of filament assemblies 52Z through the single passage.

[0167] (Super absorbent polymer particle spraying means) As the means 90 for dispersing the superabsorbent polymer particles to the filament aggregate 52Z, it is preferable to disperse the superabsorbent polymer particles substantially throughout the thickness in the filament aggregate 52Z. As such a superabsorbent polymer particle spraying means 90, it is desirable to use not only a dropping force due to its own weight but also an accelerating force. An example of this is shown in FIG. That is, a rotating drum 90b having a projection hole 90d in a casing 90a having an opening in the lower part is configured to rotate in the moving direction of the web (counterclockwise in FIG. 22), and a shatter drum 90c is provided therein. It is what was done. The projection unit 90A including these elements is connected to the hopper 90B (see FIG. 11), and the superabsorbent polymer particle spraying means 90 is configured.

[0168] The superabsorbent polymer particles 54 from the hopper 90B are configured to be supplied into the rotary drum 90b. Here, the opening position of the shatter drum 9 Oc is adjusted in advance with respect to the opening position of the casing 90a. In the state of FIG. 22, the fully opened state is shown. Further, the projection hole 90d of the rotating drum 90b is divided into four groups in the circumferential direction as shown in the drawing as a group divided in the circumferential direction. Therefore, in the process shown in the drawing, four sheets of disposable diapers are rotated. The superabsorbent polymer particles are sprayed and projected on the surface.

[0169] The superabsorbent polymer particles 54 may be continuously sprinkled on the aggregate of filaments 52, but as shown in Fig. 10, the absorbent element 50 is divided in the line direction by the cutter device 94. However, when the individual absorbent elements 50 are formed, the blades of the cutter device 94 are worn out in a short time due to the presence of the superabsorbent polymer particles 54. Therefore, it is desirable that the superabsorbent polymer particles 54 be intermittently dispersed and projected only in the zone Z, as shown in FIG.

[0170] For this reason, as described above, the projection hole 90d of the rotary drum 90b is divided into four groups in the circumferential direction as shown in the drawing, thereby forming a high absorbency. The polymer particles 54 are intermittently scattered and projected only in the zone Z. As a result, the zone Z and Z can be divided by the cutter device 94, and the blade wear of the cutter device 94 can be suppressed.

[0171] The amount of the superabsorbent polymer particles sprayed mainly depends on the size of the projection hole 90d. It can be adjusted by adjusting the position of the opening of the shatter drum 90c with respect to the opening position of the ring 90a, and the position of the opening should follow the speed of the processing line. The dispersion pattern of the superabsorbent polymer particles can be adjusted by the arrangement of the divided projection holes 90d.

[0172] On the other hand, if necessary, superabsorbent polymer particles 54 can be dispersed and projected onto the aggregate of filaments 52 together with pressurized air, so that the superabsorbent polymer particles are substantially formed on the aggregate of filaments. It is also possible to disperse in the entire thickness direction. However, it is not recommended because the superabsorbent polymer particles sprayed on the aggregate of filaments 52 are scattered by the pressure air and scattered outside the specified area.

[0173] Further, in addition to or instead of the superabsorbent polymer particle spraying means 90, the superabsorbent polymer particles 54 sprayed on the filament aggregate are sucked from below the filament aggregate. May be.

[0174] Also, as shown in FIG. 23, the rotating roll shown in FIG. 10 is replaced with a vacuum roll 106, and the above-described centrifugal component force is also applied to spread the superabsorbent polymer particles. The superabsorbent polymer particles 54 can be dispersed on the aggregate 52Z of the filaments 52 from above the vacuum roll 106 by the general-purpose superabsorbent polymer particle dispersion means 90 in the form of dropping the polymer particles by its own weight. In this case, since the superabsorbent polymer particles enter the aggregate of the filaments 52 by the suction force of the vacuum roll 106, the superabsorbent polymer particles are dispersed below the absorber 56 in the product stage. FIG. 24 shows a case where the rotating roll in the example of FIG.

[0175] The assembly 52Z of the filaments 52 is transferred to the holding sheet 80 (on the covering sheet 58 when the holding sheet is omitted) arranged on the covering sheet 58 in the roll or vacuum roll 106. Then, it is wrapped by the covering sheet 58 by passing it through the sailor 92.

[0176] On the other hand, when the superabsorbent polymer particles 54 are contained in the filament aggregate 52Z, as shown in FIG. 11 and FIG. 23, after the plurality of filament aggregates 52Z are assembled and arranged, they are integrated with each other. In addition to supplying superabsorbent polymer particles to each line, as shown in FIG. It is also possible to separately provide the superabsorbent polymer particle spraying means 90 on LI and L2, and supply the superabsorbent polymer particles individually to the filament aggregates 52Z in advance and then aggregate them. Although not shown in the drawing, although one of the lines is provided with the superabsorbent polymer particle spraying means 90, the other line is not provided with the superabsorbent polymer particle spraying means 90, and the filament contains the superabsorbent polymer particles. After forming the aggregate 52Z and the filament aggregate 52Z that is not included, these can also be self-assembled. Although not shown in the figure, as shown in FIG. 25, individual supply of the superabsorbent polymer to each filament assembly 52Z and high absorption after the filament assembly 52Z is assembled and arranged as shown in FIG. It can also be combined with the integral supply of functional polymers.

[0177] When individually supplying the superabsorbent polymer to each filament aggregate 52Z, the type, the applied amount (including the case where the applied amount is zero), and the dispersion mode of each superabsorbent polymer 52Z The density, etc. can be determined individually, and all can be the same, or the type and amount of superabsorbent polymer particles in any filament aggregate 52Z can be different from those of the other filament aggregate 52Z. You can also.

[0178] In any of the above forms, the aggregate 52Z of filaments 52 is on the holding sheet 80 (on the case where the holding sheet is omitted) arranged on the covering sheet 58 in the rotating roll or the vacuum roll 106. After being transferred to the covering sheet 58), it is wrapped by the covering sheet 58 by passing it through a sailor 92. Therefore, when the final adjustment of the aggregate 52Z of the filament 52 is performed, after the filament aggregate 52Z is formed and before the wrapping by the sailor 92, specifically in the case of the illustrated embodiment, immediately before or after the transition. Desirable to do until Sarah 92! /.

[0179] For example, during the transition, the aggregate 52Z of the filaments 52 is slightly crushed by the transition force and the tensile force of the line, and the feeling of fluff is reduced by the reduction in raising. However, in order to ensure the transfer, it is necessary to cover the transfer force as necessary and sufficient. Therefore, it is a preferable embodiment that the air injection nozzle 127 is provided immediately after the roll or vacuum roll 106, for example, and air is blown onto the upper surface of the aggregate 52Z of the filaments 52. Thereby, the entanglement of the fibers becomes strong, and the integrity of the filament aggregate 52Z is improved. The direction and angle of the air injection nozzle 127 can be freely set and adjusted according to its purpose. You can. Further, in order to blow air uniformly in the width direction, it is preferable to provide a plurality of outlets 127x at predetermined intervals in the width direction as shown in the plan view of FIG. 21 (a). In this case, the air can be distributed and supplied from the common air supply pipe 127s to each outlet 127x.

[0180] As another final adjustment, for example, an air injection nozzle 128 that injects air only at both ends of the assembly 52Z of filaments 52 can be provided immediately before the sailor 92. Thereby, only the both ends of the aggregate 52Z of the filaments 52 can be widened, and the shape of the absorbent body can be adjusted, and the entanglement between the fibers at the ends can be strengthened. The air injection nozzle 128 can be applied in combination with or instead of the air injection nozzle 127 described above. This widening by the air injection nozzle 128 is not only widening, but for example, to prevent the polymer migration-preventing adhesive applied by the adhesive applicator 104 from hiding and reliably hiding the end force of the assembly 52Z. Can be performed for an appropriate purpose. The orientation angle of the air injection nozzle 128 for widening can be freely set and adjusted according to the purpose. Further, as shown in the plan view of FIG. 21 (b), the nozzle 128 for widening has a pair of outlets 128x spaced apart in the width direction in accordance with the width of the assembly 52Z of filaments 52, A configuration may be adopted in which air is distributed and supplied from the common air supply pipe 128s to each outlet 128x.

[0181] (Example of tape-type disposable diapers)

FIG. 26 shows an example of a method for manufacturing the tape-type disposable diaper shown in FIGS. 8 and 9, which employs the first-stage opening process described above. FIG. 27 employs the second type of fiber opening process. In either case, the supply of the intermediate sheet (second sheet) 40 is the same as in the case of the pants type. After the intermediate sheet 40 is intermittently supplied, the top sheet 30 is continuously supplied from above, and the body fluid impervious sheet 70 is supplied from the lower cover, and then the noir sheet 64 constituting the noir cuff 60 is supplied. Is done. In the supply line of the nori sheet 64, supply is performed in a state in which the thread rubber 62 is fixed under stretch between two non-woven fabrics in advance by a device (not shown). At the end of the line, the semi-finished product with the absorbent body is cut by the cutter device 98 to obtain the product 10.

Industrial applicability [0182] The present invention is suitable for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, and absorbent pads used in combination with diaper covers.

Brief Description of Drawings

FIG. 1 is a perspective view of a pants-type disposable diaper.

FIG. 2 is a developed plan view of a pants-type disposable diaper.

FIG. 3 is a cross-sectional view taken along line 3—3 in FIG.

FIG. 4 is a cross-sectional view corresponding to line 3—3 of another example.

FIG. 5 is a cross-sectional view taken along line 3-3 of another example.

FIG. 6 is a cross-sectional view corresponding to the line 3-3 of a modification.

FIG. 7 is a cross-sectional view of another example taken along line 3-3.

FIG. 8 is a developed plan view of a tape-type disposable diaper.

FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG.

FIG. 10 is a schematic diagram showing an example of manufacturing equipment for a pants-type disposable diaper.

FIG. 11 is a schematic diagram of the main part of FIG.

FIG. 12 is a schematic diagram of a widening device.

FIG. 13 is a sectional view taken along line XIII—XIII in FIG.

FIG. 14 is a schematic diagram of a fiber opening device.

FIG. 15 is a schematic diagram showing another example of manufacturing equipment for a pants-type disposable diaper.

FIG. 16 is a schematic diagram of the main part of FIG.

FIG. 17 is a schematic view of a fiber opening device.

FIG. 18 is a main part schematic diagram showing a second mode of the fiber-spreading process.

FIG. 19 is a main part schematic diagram showing a third form of the fiber-spreading process.

FIG. 20 is a main part schematic diagram showing a third form of the fiber-spreading process.

FIG. 21 is a schematic view of an air injection nozzle.

FIG. 22 is a schematic view of an example of means for dispersing superabsorbent polymer particles.

FIG. 23 is a schematic view of another superabsorbent polymer particle dispersion form.

FIG. 24 is a schematic view of another superabsorbent polymer particle dispersion form.

FIG. 25 is a schematic diagram showing another example of manufacturing equipment. FIG. 26 is a schematic diagram showing an example of manufacturing equipment for a tape-type disposable paper diaper.

FIG. 27 is a schematic diagram showing an example of manufacturing equipment for a tape-type disposable paper diaper.

Explanation of symbols

10… Pants-type disposable diapers, 10A… Tape-type disposable diapers, 12 ··· Exterior sheet, 12Α ··· Knock sheet, 20 ···································· Intermediate sheet 50 ... Absorbing element, 52 ··· Filament, 52Χ ··· Veil, 52Υ ··· Tow, 52Ζ ··· Aggregate of filaments, 54 ··· High absorbent polymer particles, 56 ······ 57 ··· Non-woven fabric, 58 · · Cover sheet, 60, 60Α ··· Nori ^ 7 hous, 64 · · · Nore sheet, 70 · · · ί book! ¾ No ¾1'14 sheet, 72 · 2 Body fluid impervious sheet, 80… Retaining sheet, 90… Super absorbent polymer particle spraying means, 90 Α ··· Projection part, 90a… Case, 90b… Rotating drum, 90c… Shutter drum, 92 ··· · Sailor, 94 ··· Cutter device, ··· 98 · · · Cutter device, ··· 100 · Turning device · 102 · · · Combination station · 104 · · · Adhesive application device · 1 10… Composite opening device, 110a… Pressure air inlet, 110b… Bench lily part, 120 ··· Wideening device, 124 ··· Free-up roll, 126Α ··· No. 1-up, 126Β ··· No. 2-p, 126C ... No. 3-p, 130 ... fastening piece, 凹部 ... recess, Z • "Superabsorbent polymer particle spreading zone.

Claims

The scope of the claims

[I] In an absorbent article provided with an absorber that absorbs excreta,

[2] The absorbent article according to claim 1, wherein the plurality of filament aggregate parts are laminated in a thickness direction of the article.

[3] The absorbent article according to claim 2, comprising a layer of a filament aggregate part containing a superabsorbent polymer and a layer of a filament aggregate part not containing a superabsorbent polymer.

[4] The absorbent article according to claim 2 or 3, wherein the nonwoven fabric is sandwiched between at least one portion between the overlapping filament assembly portions.

[5] The absorbent article according to claim 1, wherein the plurality of filament aggregate parts are arranged in parallel in the width direction of the article.

[6] The absorbent article according to any one of claims 1 to 5, wherein a plurality of types of tows having different properties are used as the plurality of tows.

7. The absorbent article according to any one of claims 1 to 6, wherein at least one of the plurality of filament aggregate portions is different in basis weight, thickness, elasticity, density, and rigidity.

[8] A method for manufacturing a absorber by opening a tow to form a filament assembly, and using the filament assembly,

[9] The absorbent body manufacturing method according to claim 8, wherein when the plurality of tows are individually woven, at least two tows are made to have different opening states.

10. The absorbent body manufacturing method according to claim 8 or 9, wherein the plurality of filament aggregates are laminated in the thickness direction of the article in the assembly arrangement.

[II] The absorbent body manufacturing method according to any one of claims 8 to: LO, in which the plurality of filament aggregates are arranged side by side in a surface direction orthogonal to the thickness direction of the article in the assembly arrangement.

[12] Opening the tow to form a filament assembly, and using this filament assembly, A method of manufacturing comprising:

13. The absorbent body manufacturing method according to claim 12, wherein, on the entrance side of the passage, a plurality of tows are put together between a single roll and the adjacent tows are pressed against each other.

[14] The absorbent body manufacturing method according to any one of claims 8 to 13, wherein a plurality of types of tows having different properties are used as the plurality of tows.

15. The absorbent body manufacturing method according to any one of claims 8 to 14, wherein at least one of the plurality of filament aggregates is different in basis weight, thickness, elasticity, density, and rigidity.