WO2006003942A1 - 紙おむつ - Google Patents
紙おむつ Download PDFInfo
- Publication number
- WO2006003942A1 WO2006003942A1 PCT/JP2005/011961 JP2005011961W WO2006003942A1 WO 2006003942 A1 WO2006003942 A1 WO 2006003942A1 JP 2005011961 W JP2005011961 W JP 2005011961W WO 2006003942 A1 WO2006003942 A1 WO 2006003942A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- fiber
- tow
- absorbent
- fiber assembly
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/495—Absorbent articles specially adapted to be worn around the waist, e.g. diapers with faecal cavity
- A61F2013/4958—Absorbent articles specially adapted to be worn around the waist, e.g. diapers with faecal cavity with a faecal management layer
Definitions
- the present invention relates to a disposable diaper with improved soft stool absorption retention performance.
- Patent Document 1 JP-A-2-65861
- the main problem of the present invention is to solve the above-mentioned problems.
- the present invention that has solved the above problems is a paper diaper comprising a lower layer absorber and an upper layer absorber provided thereon,
- the upper absorbent body has a passage hole for loose stool
- At least one of the lower layer absorber and the upper layer absorber is formed by a fiber assembly formed by opening a tow,
- At least the lower-layer absorber is formed by a fiber assembly formed by opening a tow, and at least the upper-layer absorber is formed by opening a tow. Also proposed are those formed by a fiber assembly.
- the upper layer absorbent body has a passage hole having a diameter larger than the fiber gap, the stool passes through the passage hole and is quickly moved away from the skin. Then, at least one of the lower layer absorber and the upper layer absorber is formed by a fiber assembly formed by opening the tow, and the following advantages are brought about. That is, when the lower layer absorbent is a fiber assembly formed by opening the tow, the lower layer absorbent is excellent in easy expansion (or restoration property) at the time of soft stool absorption and has a high absorption rate of liquid. Therefore, the stool is absorbed promptly and reliably, and the residual solid content is securely held without returning.
- the upper layer absorbent is a fiber assembly formed by opening a tow
- the fiber length is long, and the shape of the passage hole is excellent and the cushioning property is excellent. Therefore, the lower layer absorbent absorbs and holds soft stool. Is far away from the skin!
- a paper diaper is configured such that an absorber is interposed between a top sheet and a body fluid impermeable sheet.
- an absorber When applied to such a form, it has a top sheet made of a perforated sheet through which soft stool can pass and a body fluid impermeable sheet, and the upper absorbent body is interposed between the top sheet and the body fluid impermeable sheet.
- a lower layer absorber is provided.
- the strength depends on the fineness and material of the fiber aggregate and the joining level of the fibers. Normally, the fiber density when the thickness is 10 mm Use of a material having a value of 0.0 075 g / cm 3 or less is advantageous in improving the absorption performance according to the present invention.
- the fiber assembly formed by opening the tow preferably contains superabsorbent polymer particles.
- a holding sheet is provided on the back surface side of the lower layer absorber. . If the fiber aggregate formed by opening the tow contains superabsorbent polymer particles, touching the back of the product will cause the fiber aggregate to fall off or the SAP grains below the fiber aggregate. The unevenness of the child group gives a sense of incongruity and reduces the value of the product.
- the holding sheet is provided according to the present invention, it is possible to reduce or not cause a jarring discomfort when the back surface force of the product is touched.
- FIG 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.
- the exterior sheet 12 has, for example, an hourglass shape as shown in the figure, and both sides are constricted, and this is a portion into which a wearer's leg is inserted.
- the absorbent body 20 can take any shape, but is rectangular in the illustrated form.
- 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.
- 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.
- 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 so as to fit the wearer by the contraction force. State is desirable.
- this elastic elastic member thread rubber or elastic foam band can be used, but it is desirable to use a large number of thread rubbers.
- 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, so that even if the elastic force of the thread rubber 12C itself is weak, the wearer also in the lower waist region U as a whole The product fits the wearer well.
- the absorbent main body 20 of the embodiment includes a top sheet 30 that allows body fluid to permeate, such as a non-woven fabric, an intermediate sheet (second sheet) 40, and an absorbent element 50 including an absorbent body 56. It has. 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 element 50. An exterior sheet 12 is provided on the back side of the body fluid impermeable sheet 70. In addition, it is equipped with barriers 60, 60 on both sides.
- the top sheet 30 has a property of permeating body fluid. Accordingly, the material of the top sheet 30 is sufficient if it exhibits the fluid permeability, for example, a porous or non-porous nonwoven fabric, a porous plastic sheet made of polyethylene or the like, nylon, polyethylene terephthalate. Examples thereof include a net-like material obtained by plain weaving. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. Examples include synthetic fibers such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cuvula, natural fibers such as cotton, and mixed fibers using two or more of these. It can be illustrated. Sarakuko and non-woven fabric may be produced by any processing.
- 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. For example, a laminated nonwoven fabric such as an SMS nonwoven fabric, or a laminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric can be used.
- a laminated nonwoven fabric such as an SMS nonwoven fabric, or a laminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric can be used.
- the top sheet 30 is preferably a sheet having holes M through which soft solids can pass sufficiently, for example, a perforated sheet having a large number of holes M in a nonwoven fabric or the like.
- the aperture ratio of the hole M is preferably 10 to 40%, particularly preferably 15 to 20%.
- the shape of the hole M is not particularly limited, and may be appropriately selected from circles, triangles, squares, diamonds, and the like.
- the hole M can be disposed on the entire portion overlapping the absorbers 3A and 3B, or can be disposed only on a part, for example, the excretion site (substantially the central portion).
- the diameter of one hole M is preferably 0.5 to 30 mm, more preferably 2 to 5 mm.
- the number density of the holes M is preferably 5 to 20 Zcm 2 , particularly 6 to 12 Zcm 2 .
- the number density of the holes M may be uniform within the portion having the holes M or may be changed.
- Such holes M can be formed by punching.
- the basis weight of the top sheet 30 is preferably 15 to 50 g / m 2 .
- an intermediate sheet 40 that is faster than the top sheet 30 and that is normally referred to as a “second sheet” can be provided.
- This intermediate sheet quickly transfers the body fluid to the absorbent element to improve the absorption performance of the absorbent element, preventing the “reversal” phenomenon of the absorbed body fluid from the absorbent element by force, and always drying the top sheet 30 on top. It can be made into the state which carried out.
- the intermediate sheet (second sheet) 40 is interposed between the top sheet 30 and the covering sheet 58. As shown in FIG. 4, a configuration without an intermediate sheet (second sheet) 40 can also be used.
- 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.
- 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.
- an air-through nonwoven fabric and a spunbond nonwoven fabric are preferable.
- the strength of the intermediate sheet in the longitudinal direction of the product is 0.05-5.75g'cm 2 / cm.
- the surface side force of the product Suitable for reducing or not causing a crisp discomfort when touching. It is.
- the “elasticity in the longitudinal direction of the product” means that the sample cut into a length of 200 mm and a width of 200 mm is measured with a pure bending tester (“KES-FB2” manufactured by Kato Tech Co., Ltd.) with a DFE sensitivity of 20, a curvature range of 0 Ocm _1 ⁇ 0.5cm—means the value obtained when bending in the range of 1 .
- KS-FB2 pure bending tester
- the absorbent element 50 has an upper layer absorbent body 56B in which a passage hole H through which soft stool can pass is formed, and a lower layer absorbent body 56A provided therebelow. Further, it has a covering sheet 58 that wraps at least the back and side surfaces of the absorbers 56B and 56A. Further, a holding sheet 80 is provided between the absorbers 56B and 56A and the back surface side portion (lower portion) of the covering sheet 58.
- the excreted loose stool passes through the hole M of the top sheet 30 and quickly moves to the upper absorbent body 56B, and further passes through the passage hole H of the upper absorbent body 56B. Quickly pass to the lower absorber side. In this process, a part of the liquid is absorbed by the upper absorber 56B, and most of the liquid reaches the lower absorber 56A and is absorbed and held by the lower absorber 56A. That is, both absorbers 56A and 56B have a function of absorbing and holding excreta, but characteristically, the lower layer absorber 56A mainly has a function of holding soft stool, and the upper layer absorber. 56B fulfills the interval maintaining function of holding the lower layer absorbent body 56A that holds soft stool at a position where the skin strength is far away.
- the opening ratio of the passage hole H in the upper-layer absorber 56B is preferably 5 to 40%, particularly preferably 10 to 20%.
- the shape and arrangement of the passage holes H are not particularly limited. As shown in FIG. 2, a configuration in which a large number of small holes H such as circles, triangles, squares, and rhombuses are regularly or irregularly arranged, as shown in FIG. As shown in (a), a relatively large-diameter hole H force S excretion site having an appropriate shape such as an ellipse is covered. As shown in FIG. 6B, a configuration in which a plurality of elongated rectangular holes H along the longitudinal direction are juxtaposed in the width direction can be selected as appropriate.
- the diameter of one passage hole H is preferably 3 to 50 mm, more preferably 10 to 30 mm. Further, the number of passage holes H is preferably 1 to 20 per absorber, particularly 1 to 5 per absorber. Such a through hole H can be formed by applying a punching force when manufacturing the upper-layer absorber 56B.
- At least one of the lower layer absorbent body 56A and the upper layer absorbent body 56B is formed by a tow spread fiber assembly formed by opening the tow. That is, the structure in which the lower absorbent body 56A is formed by a tow spread fiber assembly and the upper absorbent body 56B is formed by stacking absorbent fibers formed by stacking short fibers such as conventional pulp, on the contrary. In addition, the structure in which the lower absorbent body 56A is formed by the pile fiber absorbent and the upper absorbent body 56B is formed by the tow spread fiber assembly, and both the lower absorbent body 56A and the upper absorbent body 56B are the tow spread fiber assembly. Any structure formed by the body can be employed.
- the lower layer absorbent body 56A is formed of a fiber assembly that also has a tuka
- the lower layer absorbent body 56A expands with soft stool absorption and reliably captures and holds the solid content. Then, the lower layer absorbent body 56A holding soft stool is separated from the top sheet 30 by the upper layer absorbent body 56B. Therefore, the soft stool is quickly separated from the skin force and is contained and held away from the skin.
- the upper layer absorbent body 56B is formed of a fiber assembly having a tuka
- the upper layer absorbent body 56B is excellent in shape retaining property and cushioning property due to the length of the fiber length, and therefore the lower layer absorbing and retaining soft stool.
- the absorber 56A can be securely held at a position where the skin strength is far away.
- a toe-opening fiber assembly is formed by opening a tow (fiber bundle), which is a bundle of filaments substantially regarded as continuous fibers, that is, an assembly of filaments.
- tow fibers include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polybutyrate, etc.). Capable force Cellulose ester and cellulose are particularly preferable.
- 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 a spun fiber. Moyo.
- Examples of the cellulose ester that can be suitably employed 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).
- the average degree of polymerization of the cellulose ester can be, for example, 10 to 1000, preferably 50 to 900, more preferably about 200 to 800, and the average degree of substitution of the cellulose ester is, for example, about 1 to 3. It is preferably about 1 to 2.15, more preferably about 1.1 to 2.0.
- the average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.
- an organic acid ester for example, an ester with an organic acid having about 2 to 4 carbon atoms
- 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.
- the tow constituting fiber may contain various additives such as a heat stabilizer, a colorant, an oil, a yield improver, a whiteness improver, and the like.
- the fineness of the tow constituting fiber can be, for example, about 1 to 16 denier, preferably about 1 to 10 denier, and more preferably about 2 to 8 denier.
- the tow constituent fiber may be a non-crimped fiber, but is preferably a crimped fiber.
- the crimped degree of the crimped fiber is, for example, 5 to 75, preferably 10 to 50, more preferably about 15 to 50 per inch. Can do. 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 tow with high unity can be easily produced by entanglement between the fibers.
- the cross-sectional shape of the tow constituent fiber is not particularly limited, and may be, for example, a circular shape, an elliptical shape, an irregular shape (for example, a Y shape, an X shape, an I shape, an R shape) or a hollow shape. It may be.
- the cocoon-constituting fiber is, for example, in the form of a tow (fiber bundle) formed by bundling about 3,000 to 1,000,000, preferably about 5, 000-1, 000,000 single fibers. Can be used.
- the fiber bundle is preferably formed by bundling about 3,000 to 1,000,000 continuous fibers.
- a binder having an action of adhering or fusing the contact portion of the fiber can be used mainly for the purpose of maintaining the shape.
- the noda include ester plasticizers such as triacetin, triethylene glycol diacetate, triethylene glycol dipropionate, dibutyl phthalate, dimethoxyethyl phthalate, and citrate triethyl ester, as well as various types of resin adhesives, particularly thermoplastic resins. Fats can be used.
- thermoplastic resin used as a binder is a resin that exhibits an adhesive force upon melting and solidification, and includes water-insoluble or poorly water-soluble resin and water-soluble resin. Water-insoluble or poorly water-soluble rosin and water-soluble rosin can be used in combination as necessary.
- water-insoluble or poorly water-soluble resins include olefin-based homo- or copolymers such as polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene acetate butyl copolymer, polyacetic acid butyl, and polymethacrylic acid.
- olefin-based homo- or copolymers such as polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene acetate butyl copolymer, polyacetic acid butyl, 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 ⁇ , petroleum ⁇ ), such as hydrogen added hydrocarbon ⁇ can be used.
- thermoplastic rosins can be used singly or in combination.
- 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.
- thermoplastic resin Various additives such as stabilizers such as antioxidants and ultraviolet absorbers, fillers, plasticizers, preservatives, and antifungal agents may be added to the thermoplastic resin.
- binder components that inhibit penetration of superabsorbent polymer particles should be avoided whenever possible. It is best not to use binder components that inhibit the entry of superabsorbent polymer particles.
- the tow can be produced by a known method, no detailed description will be given.
- 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 a total weight of 400-600 kg.
- 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.
- the basis weight of the tow-opened fiber aggregate is preferably 30 to 300 gZm 2 , particularly 30 to 90 g / m 2 .
- the fiber basis weight can be adjusted by selecting the tow that will be the raw fabric or the production conditions.
- a fiber S having a fiber density of 0.0007 g / cm 3 or less, particularly 0.0040 to 0.0070 g / cm 3 when the thickness is 10 mm is preferable. If the fiber density is excessively high, the advantage of using a fiber assembly formed by opening a tow is reduced. For example, if the fiber density is light, it is difficult to reduce the thickness.
- the tow spread fiber assembly has a low fiber density! It has excellent properties such as cocoon retention and body fluid retention, and on the other hand, it has excellent body fluid diffusibility when the fiber density is high. Therefore, in the absorbent body composed of the toe-opened fiber aggregate, the fiber density on both sides in the width direction is set lower than that in the middle part in the width direction. Is preferred. When a strong difference in density is provided, body fluid diffuses quickly in the center in the width direction of the absorbent body composed of the toe-spreaded fiber assembly, and fluid retention is possible in both sides where quick diffusivity is not required. As a result, the most suitable characteristics are imparted to each part.
- the fiber density of both sides is 10: LOOgZm 3 regardless of how much the fiber density difference between the sides and the middle is 2 0 to 70 gZm 3 It is particularly preferable to use 30 to 50 gZm 3 . If the fiber density on both sides of the absorbent body is too low, there is a risk of warping in the width direction of the absorbent body. If the fiber density on both side parts is too high, the wearer may feel uncomfortable.
- the tow-opening fiber assembly has a characteristic that body fluid easily diffuses in the continuous direction (flow direction) of the fibers, but body fluid hardly diffuses in the direction perpendicular to the continuous direction of the fibers. is there. Therefore, as shown in Fig. 7 (a), the absorbent 56A (or 56B), which also has tow spread fiber aggregate force, has a continuous diaper DP (represented by a number of lines) in the diaper DP. It is desirable to form and arrange along the longitudinal direction (front-rear direction). If the continuous direction of the fiber is the longitudinal direction of the article, the liquid will diffuse quickly in the longitudinal direction, and the entire surface of the absorber will be used effectively. However, as shown in FIG.
- the fiber continuous direction of the tow is along the width direction of the diaper DP.
- the fibers are configured to be continuous along the transverse direction perpendicular to the thickness direction of the absorbent body 56A (or 56B).
- Examples of the toe opening method include a method in which the tow is spread over a plurality of opening rolls, and the tow width is gradually expanded as the tow progresses, and the tow tension (elongation) is used.
- a method of repeatedly opening and relaxing (shrinking) and a method of widening and opening using compressed air can be used.
- FIG. 12 shows an example of a fiber opening facility, where the tow bales 52X to 52Y are sequentially unwound, and in the course of the conveyance, the widening fiber opening means 120 using compressed air and the downstream side rolls around. Multiple high-speed spreads-Passing through the spread parts combined with pup rolls 126A, 126B, 126C in order, widened and opened, then passed through the binder addition box 140 to give the binder 140b (for example, triacetin The mist is filled in a box), and is formed as a fiber assembly 52Z that also has a desired width'density tuca.
- a pile absorbent body can be manufactured by stacking short fibers such as pulp by a known method and entanglement treatment with air or water flow.
- Pulp fibers can be cellulose fibers such as chemical pulp and dissolving pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. Needle leaf pulp with longer fiber length than hardwood pulp Is preferably used in terms of function and price.
- the fiber assembly 40 that is also a tuca can contain a superabsorbent polymer.
- the superabsorbent polymer include starch-based, cellulose-based and synthetic polymer-based polymers such as carboxymethylcellulose, polyacrylic acid and its salts, crosslinked acrylate polymer, and starch-acrylic acid graft copolymer. , Starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product, carboxymethylcellulose cross-linked product, polyethylene oxide, polyacrylamide etc.
- a copolymer of isoprene and maleic acid is preferably used. It is also possible to use a product with an anti-blocking agent added in order to suppress the blocking property due to moisture absorption of the product.
- the shape of the superabsorbent polymer has various forms such as particles (including powder), granules, pellets, sols, suspensions, gels, films, and nonwovens. However, any of these can be used in the present invention, and particulates are particularly preferably used.
- the particulate superabsorbent polymer for example, those having a particle diameter of 20 to 850 m can be suitably used.
- Average particle size about 350
- the superabsorbent polymer those having a water absorption amount of 50 gZg or more are basically suitable regardless of the water absorption performance.
- the water absorption rate of the superabsorbent polymer is preferably 45 seconds or less. When the water absorption speed exceeds 45 seconds, so-called reversion in which the body fluid supplied into the absorption element returns to the outside of the absorption element is likely to occur.
- the superabsorbent polymer those having a gel strength of 900 Pa or more are preferably used. Thereby, even if it is a case where it is set as a bulky absorber by using tow
- the basis weight of the superabsorbent polymer can be appropriately determined according to the amount of absorption required for the application of the absorbent element. Therefore, although it cannot be generally stated, for example, it can be 400 gZm 2 or less. If the amount of polymer is too small, the absorption performance cannot be maintained.On the other hand, if the amount of polymer is excessively large, the excess of high-absorbent polymer particles that cause the effect to saturate will give the above-mentioned crisp discomfort. .
- a method of incorporating a superabsorbent polymer into a tow spread fiber assembly a method of spraying or projecting a particulate superabsorbent polymer from the outside, a monomer (superabsorbent polymer) to a fiber assembly composed of tow
- a method of polymerizing after impregnating a polymer to be polymerized, or a method of performing a crosslinking treatment after coating an uncrosslinked gel-like superabsorbent polymer on a fiber assembly made of tow can be employed.
- the superabsorbent polymer can be contained in the absorbent body by a known method such as an air array method or a polymerization method.
- the superabsorbent polymer may be held in the fiber assembly, on the surface of the fiber assembly, or both. Furthermore, the superabsorbent polymer may be retained only partially on the surface of the fiber assembly and may be retained entirely within the fiber assembly.
- a highly absorbent polymer can be provided in a layer form on at least one of the front surface side and the back surface side of the fiber assembly. In particular, it is preferable to provide a superabsorbent polymer layer on the back side of the fiber assembly. In these cases, the superabsorbent polymer can be adhered to the sheet enclosing the fiber assembly with an adhesive. As an adhesive in this case The aforementioned thermoplastic resin can be used.
- the superabsorbent polymer particles are desirably dispersed substantially throughout the thickness direction with respect to the fiber assembly, at least in the body fluid receiving region. If there are no SAP particles in the upper, lower and middle parts of the fiber assembly, it cannot be said that it is “dispersed throughout the thickness direction”. Therefore, “distributed throughout the thickness direction” means “distributed unevenly” in the upper, lower, and / or intermediate portions of the fiber aggregate in addition to the form “uniformly” distributed throughout the thickness direction. "Is still distributed in the upper, lower and middle parts. Also, some SAP particles remain on the surface without entering the fiber assembly, or some SAP particles pass through the fiber assembly and are on the covering sheet 58. Further, as shown in FIG.
- the form on the holding sheet 80 is not excluded. If gel blocking is not considered, it may be unevenly distributed only in the upper part or only in the middle part. If reversal is not considered, it may be unevenly distributed only in the intermediate part or only in the lower part.
- the superabsorbent polymer particles can be adjusted in spraying density or amount in the plane direction of the product. For example, it is possible to increase the amount of body fluid excretion site more than other sites. When gender differences are taken into account, men can increase the front spray density (quantity) and women can increase the center spray density (quantity). It is also possible to provide a portion where no polymer exists locally (for example, in a spot shape) in the plane direction of the product.
- the dispersion density of the superabsorbent polymer particles is large is summarized as follows. Now, as shown in Fig. 9, with respect to the absorbent element 50, the width direction of the product is X, the longitudinal direction is Y, and the thickness direction is ⁇ . If the dispersion density of the superabsorbent polymer particles is defined as ⁇ uniform '', the characteristic effect of each form is shown in Table 2. ⁇ As shown in Table 4. Of course, each condition can be used in combination. The
- SAP can be efficiently placed on the required sound, and it can be done at low cost.
- the ratio between the superabsorbent polymer particles and the fiber assembly determines the absorption characteristics.
- a weight ratio in a planar area of 5 cm ⁇ 5 cm in a region directly receiving body fluid it is desirable that the weight of the superabsorbent polymer single particle Z fiber is 1 to 14, particularly 3 to 9.
- the lower layer absorbent body 56A and the upper layer absorbent body 56B preferably have an overall planar projection area of 250 cm 2 or more.
- the thicknesses of the lower absorbent body 56A and the upper absorbent body 56B can be determined as appropriate.
- the lower absorbent body 56A and the upper absorbent body 56B are designed to take out the absorbent article from the package, and have a room temperature of 23 degrees and a humidity of 50%. It is preferable that the total thickness (total of the thickness of the lower layer absorber 56A and the thickness of the upper layer absorber 56B) is 3 ⁇ 4 to 20 mm, particularly 5 to 15 mm when left for 1 day.
- the size force of the lower layer absorber 56A and the upper layer absorber 56B is within this range, which is extremely advantageous in improving the resilience without increasing the weight, thickness, and cost.
- the lower absorbent body 56A and the upper absorbent body 56B can have different thicknesses. In particular, by making the lower absorbent body 56A thicker than the upper absorbent body 56B, soft stool accommodation is possible. It is preferable to ensure a sufficient amount. Further, it is preferable that the weight of the absorber is 25 g or less, particularly 10 to 20 g.
- the compression resilience RC of the lower layer absorbent body 56A and the upper layer absorbent body 56B is preferably 40 to 60%, particularly preferably 50 to 60%. As a result, the absorber itself can exhibit sufficient resilience.
- the compression energy WC of the lower layer absorber 56A and the upper layer absorber 56B is 4.0 to 10.
- Ogf 'cmZcm 2 is preferable because it can be compressed to the same level as before or even when packing.
- These compression characteristics can be adjusted by adjusting the fiber density of the fiber assembly by opening or the like, selecting the fiber material, selecting the kind of binder such as a plasticizer, adjusting the degree of processing, or a combination thereof. Etc. can be adjusted.
- the compression energy is the energy consumption when pressing the center part of a test piece cut to a length of 200mm and a width of 50mm up to 50g (example is the thickness at this time). is there.
- 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
- the compression resilience is a parameter representing the recoverability when the fiber is compressed. Therefore, if the recoverability is good, the compression resilience increases.
- This compression Les Jiriensu can by handy compression tester (KE s-G5, manufactured by Kato Tech Co., Ltd.), is measured. The measurement conditions for this tester are the same as for the compression energy.
- 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.
- the superabsorbent polymer particles it is desirable that the superabsorbent polymer particles be a sheet that does not come out.
- crepe paper Thus, a sheet having an absorptivity is preferable.
- hydrophilic SMMS spunbond Z meltblown Z meltblown Z spunbond
- materials such as polypropylene and polyethylene zpolypropylene can be used.
- the basis weight is preferably 8 to 20 gZm 2 , particularly 10 to 15 gZm 2 .
- the covering sheet 58 has a form that wraps the entire layer of fiber aggregates and superabsorbent polymer particles 54, and, for example, as shown in Fig. 4, the back surface of the layer and It may be one that only covers the sides.
- the upper and side surfaces of the absorbent bodies 56A and 56B 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.
- the side and bottom surfaces may be covered with a body fluid impermeable sheet such as polyethylene! /! (Each of these materials becomes a component of the covering sheet).
- the fiber aggregate and the superabsorbent polymer particles 54 may be sandwiched between two upper and lower sheets or arranged only on the bottom and top surfaces, but it is difficult to prevent the superabsorbent polymer particles from moving. , So desired, not in form.
- the superabsorbent polymer particles 54 can be interposed between the holding sheet 80 and the absorbent bodies 56A and 56B by the dispersion thereof.
- the superabsorbent polymer particles 54 may pass through the fiber assembly at the time of spraying / projecting on the fiber assembly, during the subsequent process, or until the consumer uses it.
- the irregularities of the group of superabsorbent polymer particles that have passed through the fiber assembly give a crisp and uncomfortable feeling when touched by the hand when used by consumers. Therefore, the holding sheet 80 having the holding performance of the absorbent polymer is interposed between the absorbent bodies 56A and 56B and the covering sheet 58.
- the holding sheet 80 is not sufficient only with the covering sheet 58 such as tissue paper (crepe paper), but it reinforces the stiffness and reduces or prevents the uncomfortable feeling when touched by the hand when the consumer uses it.
- the material of the holding sheet 80 is not particularly limited, and the holding sheet 80 has a holding performance of the absorbent polymer. Is enough. 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 and the like.
- the holding sheet 80 When the holding sheet 80 is a non-woven fabric, the holding sheet 80 has a compression energy based on the KES test of 0.01 to: LO. OOgfcm / cm 2 , preferably 0.01 to: L OOgfcm / cm 2 And a compression resilience of 10 to 100%, preferably 70 to 100%.
- the elasticity of the holding sheet 80 in the longitudinal direction of the product is 0.05-0.75 g'cm 2 / cm in order to reduce or prevent the crisp discomfort caused by the superabsorbent polymer. Is preferred.
- the “back and forth stiffness of the product” means a sample that has been cut into a length of 200 mm and a width of 200 mm using a pure bending tester (“KES-FB2” manufactured by Tohtec Corp.) with a DFE sensitivity of 20, a curvature range of 0. Ocm 1 to 0.5cm—means the value obtained when bent in the range of 1 .
- the reason for providing the holding sheet 80 is to hold the absorbent polymer that has fallen down (dropped out), for example, from the fiber assembly as mentioned above. Therefore, since the superabsorbent polymer particles that have slipped out come into contact with the user via the covering sheet 58 and the holding sheet 80, there is no possibility of being conveyed to the user as a sense of incongruity.
- the non-woven fabric having the above-described compression energy and compression resilience sufficiently exhibits the function as a holding sheet.
- the absorbent polymer that has slipped out is held by the holding sheet 80 and does not move on the covering sheet 58, there is no possibility of uneven absorption capacity.
- a hot melt adhesive or the like having adhesiveness can be applied on the holding sheet 80 in advance.
- the upper surface of the holding sheet 80 may be roughened so that the superabsorbent polymer particles can be prevented from moving on the holding sheet 80.
- the holding sheet 80 may be provided only below the absorber 56 as shown in Fig. 3 or the like, and although not shown, it passes through the side surfaces of the absorbers 56A and 56B and reaches the upper surfaces of the absorbers 56A and 56B. It may be rolled up and extended. It is also possible to use a plurality of holding sheets 80 in a stacked manner.
- the above example is an example in which the holding sheet 80 is provided between the absorbers 56A and 56B and the back side portion of the covering sheet 58.
- the force holding sheet 80 may be provided on the back side of the covering sheet 58.
- Well the form is not shown in the figure, it is important that the covering sheet 58 itself functions as a holding sheet without providing the holding sheet 80 separately. By providing a sheet 80, it is possible to reduce the sense of discomfort when touching the rear surface force of the product.
- the body fluid impermeable sheet 70 simply means a sheet disposed on the back side of the absorbers 56A and 56B.
- the absorbers 56A and 56B are interposed between the top sheet 30 and the body fluid impermeable sheet 70. It is a sheet. 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 liquids by interposing a waterproof film ( In this case, a bodily fluid impermeable sheet is comprised with a waterproof film and a nonwoven fabric.) Etc.
- this force can also be exemplified by a material having liquid-impervious and moisture-permeable properties, which has been used in recent years in view of its ability to prevent stuffiness.
- a material having liquid-impervious and moisture-permeable properties which has been used in recent years in view of its ability to prevent stuffiness.
- an inorganic filler is kneaded in polyolefin resin such as polyethylene or polypropylene, the sheet is formed, and then stretched uniaxially or biaxially. Examples of the microporous sheet obtained in this way can be given.
- the body fluid impermeable sheet 70 has a force capable of preventing side leakage of body fluid by extending (not shown) the surface to be used in a so-called framed form. 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 fluid-impermeable sheet 72 extends until the Norriya cuff 60 is erected! /. The advantage of preventing side leakage of loose stools between 60 is there.
- Barrier force hose 60, 60 provided on both sides of the product is provided to prevent urine and loose stool that move laterally along the top sheet 30 and prevent side leakage. Element.
- the illustrated barrier force hoop 60 is formed by doubling the barrier sheet and covers the folded portion of the top surface 30 from the back side of the absorbers 56A and 56B to the front side. It is formed to protrude.
- the side of the body fluid-impermeable sheet 70 is inserted between the double nonwoven sheets, and the noir cuff 60 protruding from the surface side It extends halfway.
- the shape of the barrier one-force hose 60 itself can be designed as appropriate.
- 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 is erected diagonally toward the center, and the tip end is inclined obliquely outward from the middle part.
- the material of the noir sheet is not particularly limited as long as it has a property of permeating body fluids or a property of not permeating body fluids.
- the same material as exemplified as the top sheet 30 and the body fluid impermeable sheet 70 can be used.
- a bulky nonwoven fabric such as an air-through nonwoven fabric, which is preferably a nonwoven fabric.
- a water-repellent nonwoven fabric or a hydrophilic nonwoven fabric may be used alone or in combination.
- a water-repellent treatment coated with a water-repellent nonwoven fabric for example, a silicone-based, paraffin-based, or alkyl-clogged water-repellent water repellent.
- a non-woven fabric is preferred.
- non-hydrophilic fibers other than hydrophilic non-woven fabrics such as non-woven fabrics made of hydrophilic natural fibers, synthetic fibers, regenerated fibers, etc.
- a nonwoven fabric that has been hydrophilically treated with a hydrophilic agent can be used.
- the type of elastic elastic member is not particularly limited as long as it has elasticity.
- stretchable hot melt, stretchable film, thread rubber, flat rubber and the like can be exemplified.
- the material include styrene-based, olefin-based, urethane-based, and ester-based rubbers, and foams such as polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester.
- embossed recesses E are formed only on the top sheet 30, and as shown in FIG. 5, the embossed recesses E are formed on both the topsheet 30 and the intermediate sheet 40.
- a recess by embossing can be formed so as to reach part or substantially the entire thickness of absorbers 56A and 56B from the surface side.
- the intermediate sheet 40 has a basis weight of 8 to 40 gZm 2 , a thickness of 0.2 to 1.5 mm, and the top sheet 30 Is desirable in that embossing force can be sufficiently exerted under the condition that the force permeability is in the range of 5 to 80 gZm 2 and thickness of 0.2 to 3.5 mm.
- 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. Even if only 56A and 56B are formed with recesses by embossing, and only the absorber 56A and 56B without forming recesses on top sheet 30, intermediate sheet 40 and covering sheet 58, recesses by embossing are formed. Also good.
- the recess E has an effect of inducing and diffusing body fluid in the direction in which the recess E extends. Therefore, if the recess E is substantially continuous in the shape of a groove (including the case where a plurality of recesses are arranged at intervals to form a single groove), the body fluid will reach the absorbers A and 56B. Then, it diffuses along the concave portion E of the surface side layer, so that a wider part of the absorbers A and 56B can be used for absorption. As a result, the absorbent capacity of the entire product is increased, and the absorbent article is less prone to side leakage or reversal due to insufficient absorbent capacity.
- embossing it is preferable to form a concave portion by embossing in the fiber assembly because the rigidity can be increased.
- embossing is integrally performed so as to reach the absorbers 56A and 56B from the back surface side of the holding sheet 80, the covering sheet 58, the body fluid impermeable sheet 70 or the exterior sheet 12. Can be applied.
- such a recess on the back side is preferably formed together with the recess E on the front side, but only the recess on the back side can be formed without forming the recess E on the front side.
- the shape of the concave portions may be common to the front and back sides or may be different from each other.
- the embossed recess has the 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.
- 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.
- 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.
- the constituent members of the absorbent main body 20 are fixed to each other with a hot melt adhesive or the like.
- Adhesive can be applied by curtains, spirals, slots, control seams (omega-shaped coating), bead coating, etc.
- FIG.10 and FIG.11 has shown the example of the tape-type disposable diaper.
- FIG. 11 shows a slightly exaggerated view of the force-absorbing main body 20, which is a view taken along line 4-4 in FIG. [0102]
- 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 sheet of the back of the diaper.
- This is a diaper in which the non-woven fabric laminate is used and the hook element of the fastening piece can be engaged with any part of the surface of the backsheet when the diaper is installed.
- the absorbent main body 20 includes an upper layer absorbent body 56B in which a passage hole H through which soft stool can pass is formed between the top sheet 30 and the body fluid impermeable sheet 70, and a lower layer absorbent body 56A. It is what was made to.
- the body fluid impermeable sheet 70 is formed in a rectangular shape wider than the absorbent bodies 56A and 56B, and a back sheet 12A having an hourglass-shaped nonwoven fabric force is provided on the outer side thereof.
- the top sheet 30 has a rectangular shape wider than the absorbent bodies 56A and 56B, extends slightly outward from the side edges of the absorbent bodies 56A and 56B, and is fixed to the body fluid impermeable sheet 70 with a hot melt adhesive or the like. Yes.
- the intermediate sheet 40 can be interposed between the top sheet 30 and the absorbers 56A and 56B. Further, the whole or a part of the absorbent bodies 56A and 56B can be wrapped by the covering sheet 58. Further, a holding sheet 80 can be provided on the back side of the absorbers 56A, 56B.
- a barrier one-force hull 60A that protrudes toward the surface to be used is formed.
- This noir cuff 60A has a non-woven sheet 64 that also has a nonwoven force substantially continuous in the width direction, and elastic stretch 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.
- the inner surface of the NORY sheet 64 has a fixing start at a position separated from the side edge of the top sheet 30, and the fixing start end 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.
- an elastic elastic member for gasket cuffs, for example, thread rubber 66 is provided.
- the fastening piece 130 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.
- 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 the assembly of the product, the temporary fixing adhesive portion 130B is adhered to the force barrier sheet 64 to prevent peeling of the front end side of the fastening piece 130. 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.
- a target print sheet 74 as a design sheet is provided on the inner surface side of the knock sheet 12A, 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 made visible through the back sheet 12A from the outside.
- the diaper 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.
- the space surrounded by the standing part forms a confined space for urine or soft stool.
- the urine is absorbed into the absorbent bodies 56A and 56B through the top sheet 30, and the rising part of the Noriya cuffs 60A becomes the barrier for loose solids. The overcoming is prevented.
- side leakage is prevented by the stop function by the flat contact part.
- the liner sheet 64 forming each standing cuff is not liquid-permeable but substantially liquid-permeable (or semi-liquid-permeable).
- it is The liquid may be repelled by silicon treatment or the like.
- the nore sheet 64 and the back sheet 12A are air permeable, and the barrier sheet 64 and the back sheet 12A are sheets having a hydrostatic pressure of lOOmmH 2 O or more, respectively.
- the present invention will be described in detail by taking an example of a so-called tape-type diaper of the type in which the left and right side edges on the back side are joined to the ventral side when in use (when worn). And pants-type disposable diapers with both side edges joined in advance, and other forms of disposable diapers.
- FIG. 1 is a perspective view showing a pants-type diaper.
- FIG. 2 is a plan view showing a pants-type diaper in an unfolded state.
- FIG. 3 is a cross-sectional view taken along line 3-3 in FIG.
- FIG. 4 is a cross-sectional view showing another example.
- FIG. 5 is a cross-sectional view showing another example.
- FIG. 6 is a plan view showing the absorber.
- FIG. 7 is a plan view showing the absorber.
- FIG. 8 is a schematic diagram showing a tow opening facility.
- FIG. 9 is a schematic diagram for explaining the direction of the absorbing element.
- FIG. 10 is a plan view showing the tape-type diaper in a developed state.
- FIG. 11 is a cross-sectional view taken along line 4-4 of FIG.
- FIG. 12 is a cross-sectional view showing another example.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05755172A EP1774935A1 (en) | 2004-06-30 | 2005-06-29 | Paper diaper |
US11/630,912 US20080262459A1 (en) | 2004-06-30 | 2005-06-29 | Paper Diaper |
CN2005800216908A CN1976659B (zh) | 2004-06-30 | 2005-06-29 | 纸尿布 |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004194853A JP4694798B2 (ja) | 2004-06-30 | 2004-06-30 | 紙おむつ |
JP2004-194853 | 2004-06-30 | ||
JP2004344715A JP4553700B2 (ja) | 2004-11-29 | 2004-11-29 | 吸収性物品及び吸収体の製造方法 |
JP2004-344715 | 2004-11-29 | ||
JP2005-031662 | 2005-02-08 | ||
JP2005031662A JP4790281B2 (ja) | 2005-02-08 | 2005-02-08 | 吸収性物品 |
JP2005-103856 | 2005-03-31 | ||
JP2005103856A JP4790296B2 (ja) | 2005-03-31 | 2005-03-31 | 吸収性物品 |
Publications (1)
Publication Number | Publication Date |
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WO2006003942A1 true WO2006003942A1 (ja) | 2006-01-12 |
Family
ID=35782749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/011961 WO2006003942A1 (ja) | 2004-06-30 | 2005-06-29 | 紙おむつ |
Country Status (3)
Country | Link |
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US (1) | US20080262459A1 (ja) |
EP (1) | EP1774935A1 (ja) |
WO (1) | WO2006003942A1 (ja) |
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PL3233007T3 (pl) | 2014-12-19 | 2021-04-19 | Essity Hygiene And Health Aktiebolag | Wyrób chłonny |
CN107405242A (zh) | 2015-03-16 | 2017-11-28 | 宝洁公司 | 带有改善的芯的吸收制品 |
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CN107683126A (zh) | 2015-05-29 | 2018-02-09 | 宝洁公司 | 具有槽和润湿指示标记的吸收制品 |
JP6198076B2 (ja) | 2015-09-25 | 2017-09-20 | 大王製紙株式会社 | 吸収性物品 |
EP3167859B1 (en) | 2015-11-16 | 2020-05-06 | The Procter and Gamble Company | Absorbent cores having material free areas |
JP6186416B2 (ja) * | 2015-11-30 | 2017-08-23 | 大王製紙株式会社 | 失禁用吸収性物品 |
JP6234492B2 (ja) | 2016-02-10 | 2017-11-22 | 大王製紙株式会社 | パッドタイプ使い捨ておむつ |
JP6250719B2 (ja) * | 2016-02-29 | 2017-12-20 | 大王製紙株式会社 | 使い捨ておむつ |
EP3238678B1 (en) | 2016-04-29 | 2019-02-27 | The Procter and Gamble Company | Absorbent core with transversal folding lines |
EP3238676B1 (en) | 2016-04-29 | 2019-01-02 | The Procter and Gamble Company | Absorbent core with profiled distribution of absorbent material |
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- 2005-06-29 EP EP05755172A patent/EP1774935A1/en not_active Withdrawn
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JP2007283086A (ja) * | 2006-03-23 | 2007-11-01 | Kao Corp | 吸収体及びその製造方法 |
US8373016B2 (en) | 2006-03-23 | 2013-02-12 | Kao Corporation | Absorbent member and method of producing the same |
JP2008125605A (ja) * | 2006-11-17 | 2008-06-05 | Kao Corp | 吸収体及びその製造方法 |
Also Published As
Publication number | Publication date |
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US20080262459A1 (en) | 2008-10-23 |
EP1774935A1 (en) | 2007-04-18 |
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