WO2018110629A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2018110629A1
WO2018110629A1 PCT/JP2017/044837 JP2017044837W WO2018110629A1 WO 2018110629 A1 WO2018110629 A1 WO 2018110629A1 JP 2017044837 W JP2017044837 W JP 2017044837W WO 2018110629 A1 WO2018110629 A1 WO 2018110629A1
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WO
WIPO (PCT)
Prior art keywords
sheet
liquid
absorbent article
body fluid
recess
Prior art date
Application number
PCT/JP2017/044837
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English (en)
Japanese (ja)
Inventor
晶美 小田
Original Assignee
大王製紙株式会社
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Filing date
Publication date
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2018110629A1 publication Critical patent/WO2018110629A1/fr

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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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • 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

Definitions

  • the present invention relates to an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, and more particularly to an absorbent article in which a polymer sheet is interposed between a liquid-permeable top sheet and a back sheet.
  • a body fluid is absorbed and retained between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet.
  • a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric
  • a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet.
  • the absorbent article As the absorbent body, only a superabsorbent polymer (SAP) is disposed between at least two layers of sheets, and each sheet is composed of piled pulp or the like.
  • SAP superabsorbent polymer
  • a polymer sheet also referred to as an SAP sheet or a Palpress absorber
  • the absorbent article is excellent in that it can absorb and retain a large amount of body fluid while reducing the thickness of the absorbent article.
  • the fibrous absorbent material such as piled pulp is not blended in the polymer sheet, the force for drawing body fluid into the absorbent body due to capillary action or the like is weaker than that of the absorbent body using the fibrous absorbent material.
  • the absorption rate was slow.
  • menstrual blood having a high viscosity since it is difficult to be drawn into the absorbent body, anxiety about leakage is increased by diffusing extensively on the surface. If the diffusion area on the surface increases, there is a risk that it may be judged that the absorption performance is low even though no leakage has actually occurred, and there is a risk that subsequent use will be avoided. is there.
  • Patent Document 1 in which the diffusibility of the liquid on the surface is suppressed
  • Patent Document 2 in which an opening is provided in the surface material
  • the bottom of the recess has a linear pressure-bonded portion in which constituent fibers are pressure-bonded or bonded, and has a plurality of convex portions surrounded by the recess, Since the intersections of the constituent fibers are joined by means other than pressure bonding in a part other than the part, it is disclosed that the liquid flow and the liquid spread are suppressed by the unevenness and the linear embossed part with large undulations. Yes.
  • the excretory fluid is permeated and has a surface sheet facing the skin made of a perforated sheet;
  • An absorbent article is disclosed in which the effective opening area of a single transmission hole is 3 to 75 mm 2 and the opening area ratio is 10 to 80%.
  • a main problem of the present invention is to make it easier to draw body fluid and reduce anxiety about leakage while suppressing diffusion of the liquid on the surface.
  • a polymer sheet in which a superabsorbent polymer is disposed between at least two layers is interposed between a liquid-permeable top sheet and a back sheet as the present invention according to claim 1.
  • a large number of recesses surrounded by saddle-like projections that are recessed toward the non-skin side and are continuous in a continuous lattice pattern An absorbent article is provided that is formed.
  • a sheet-like polymer sheet in which only the superabsorbent polymer is disposed between at least two layers of sheets and no fibrous absorbent material made of piled pulp or the like is interposed between the sheets is used.
  • the absorbent article a large number of recesses surrounded by bowl-shaped protrusions that are recessed to the non-skin side and continuous to the non-skin side in the region including the body fluid discharge site on the skin side surface of the liquid-permeable surface sheet Since it is formed in a typical lattice pattern, the discharged body fluid is temporarily stored in the recess, and then penetrates into the absorber on the lower layer side.
  • the permeation rate of the body fluid into the sheet is slightly reduced, and the body fluid that has entered the recess is temporarily Therefore, the penetration rate of body fluid into the lower polymer sheet is moderately suppressed, and the absorption rate of the superabsorbent polymer, which is slower than the pulp, is absorbed from the liquid-permeable surface sheet.
  • the balance with the permeating speed becomes good, and the body fluid diffused through the polymer sheet is surely absorbed and retained by the superabsorbent polymer without causing overflow in the polymer sheet.
  • the discharged body fluid On the surface of the liquid-permeable surface sheet, the discharged body fluid is temporarily stored in a recess surrounded by a bowl-shaped projection that is continuous with the periphery, so that the diffusion of the liquid on the surface is minimized.
  • the wearer confirms the diffusion state of the liquid after use, the anxiety about leakage can be reduced.
  • the liquid-permeable surface sheet is appropriately consolidated in the recess, the body fluid easily moves from the low-density region to the high-density region due to the density difference, and a body fluid drawing action occurs.
  • the absorbent article according to claim 1 wherein the bottom surface of the recess is formed in a cross-sectional shape that gradually becomes deeper toward the center of the recess.
  • the fiber density of the liquid-permeable surface sheet is increased from the peripheral portion to the center by forming the bottom surface of the concave portion in a cross-sectional shape in which the depth gradually increases toward the central portion of the concave portion. Since it changes so as to gradually increase toward the part, body fluid can easily permeate due to the difference in fiber density, and it is difficult for liquid residue to occur between the fibers, so that the remaining body fluid can be prevented from returning to the surface. become.
  • a preferable range is defined for the area ratio between the concave portion and the convex portion.
  • the concave portion is formed with an appropriate size with respect to the convex portion, and the concave portion can reliably function as a temporary storage space for bodily fluids.
  • the area ratio of the said recessed part and a convex part is represented by ratio of the total area of the area
  • the present invention according to claim 4 provides the absorbent article according to any one of claims 1 to 3, wherein an area per one of the recesses is 30 to 1000 mm 2 .
  • the recess can function reliably as a temporary body fluid storage space.
  • the present invention according to claim 5 provides the absorbent article according to any one of claims 1 to 4, wherein the concave portion is welded to the non-skin side surface of the liquid-permeable surface sheet at the deepest portion of the center portion.
  • the fiber density distribution of the liquid-permeable surface sheet is the deepest portion of the central portion by welding to the non-skin side surface of the liquid-permeable surface sheet at the deepest portion of the central portion. Since the body fluid becomes the highest density and the body fluid is easily drawn into this portion due to the difference in fiber density, the body fluid penetrates into the absorbent body through the central portion of the recess.
  • a planar shape of the recess is a polygon, a circle or an ellipse.
  • a rhombus a hexagon
  • a polygon such as a triangle, a circle or an ellipse
  • the present invention according to claim 7 provides the absorbent article according to any one of claims 1 to 6, wherein the liquid-permeable surface sheet is composed of a single-layer sheet or a multilayer structure in which a plurality of sheets are laminated. Is done.
  • the liquid-permeable surface sheet a sheet composed of one layer may be used, or a sheet composed of a multilayer structure in which a plurality of sheets are laminated may be used. .
  • a multilayer structure in which the fiber density and the fiber thickness of the skin side layer and the non-skin side layer can be changed.
  • FIG. 3 is an enlarged plan view of a skin side surface of a liquid-permeable surface sheet 3.
  • FIG. FIG. 4 is a cross-sectional view of the liquid-permeable surface sheet 3 (a view taken along arrows AA and BB in FIG. 3).
  • A) is a liquid absorption state using a conventional pulp-containing absorber
  • B) is a liquid absorption state using a conventional liquid-permeable surface sheet
  • (C) is a cross-sectional view showing the liquid absorption state of the present invention. is there. It is sectional drawing of the liquid-permeable surface sheet 3 which concerns on a modification.
  • FIG. 3 It is an enlarged plan view of the skin side surface of the liquid-permeable surface sheet 3 which concerns on a modification.
  • 3 is a cross-sectional view of a liquid-permeable top sheet 3.
  • FIG. It is sectional drawing of the polymer sheet 4 which concerns on a modification.
  • the sanitary napkin 1 has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage.
  • a liquid surface sheet 3 a polymer sheet 4 in which a superabsorbent polymer is disposed between two sheets interposed between both sheets 2 and 3, and a longitudinal direction on each side of the surface.
  • the side nonwoven fabrics 7 and 7 are formed.
  • the outer edge portions of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 are hot-melt adhesive, heat seal, etc.
  • the liquid-impermeable back sheet 2 and the side nonwoven fabric 7 that are joined by the adhesive means and extend laterally from the side edges of the polymer sheet 4 at both side edges thereof are adhesives such as hot melt, Joined by adhesive means such as heat sealing, an outer peripheral flap portion where the polymer sheet 4 does not exist is formed on the outer periphery.
  • the structure of the sanitary napkin 1 will be described in detail.
  • a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used.
  • a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film.
  • those having moisture permeability tend to be used from the viewpoint of preventing stuffiness.
  • This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.
  • the polymer sheet 4 interposed between the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is disposed at least on the skin side (liquid-permeable surface sheet 3 side) as shown in FIG.
  • the superabsorbent polymer 4C is arranged between the upper layer sheet 4A and the lower layer sheet 4B arranged on the non-skin side (impermeable liquid back sheet 2 side). Compared to a thin sheet, it is formed.
  • the polymer sheet 4 has a two-layer structure in which a superabsorbent polymer 4C is disposed between the upper layer sheet 4A and the lower layer sheet 4B, but as shown in FIG. 9, between these sheets 4A and 4B.
  • One or a plurality of intermediate sheets 4D in the illustrated example are arranged between the sheets (between the upper sheet 4A and the intermediate sheet 4D, between the intermediate sheets 4D, between the intermediate sheet 4D and the lower sheet 4B). It may be formed in a five-layer structure or more in which the superabsorbent polymer 4C is disposed in the middle). Between the sheets, a fibrous absorbent material made of piled pulp or the like is not interposed, and only the powdery superabsorbent polymer 4C is disposed. For this reason, the thickness of the polymer sheet 4 can be reduced, and the sanitary napkin 1 can be reliably reduced in thickness.
  • a porous or non-porous nonwoven fabric As the upper layer sheet 4A constituting the polymer sheet 4, a porous or non-porous nonwoven fabric, a crepe paper, a pulp sheet, or a porous plastic sheet is used.
  • the raw material fibers constituting the nonwoven fabric in the same manner as the liquid-permeable surface sheet 3, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, cotton Natural fibers such as
  • the processing method of the said nonwoven fabric is not ask
  • the pore diameter of the porous plastic sheet is preferably smaller than the average outer shape of the superabsorbent polymer 4C in order to prevent the superabsorb
  • a sheet material having water shielding properties can be used in addition to a perforated or non-porous nonwoven fabric, a crepe paper, a pulp sheet, or a porous plastic sheet.
  • the nonwoven fabric processing method is not limited. However, in order to prevent the superabsorbent polymer 4C from falling off, the fiber density of the obtained product, such as the spunbond method, the melt blown method, and the needle punch method, is increased. A processing method is preferred.
  • the pore diameter of the porous plastic sheet is preferably smaller than the average outer shape of the superabsorbent polymer 4C in order to prevent the superabsorbent polymer 4C from falling off.
  • the water-impervious sheet material the same material as the liquid-impermeable back sheet 2 can be used.
  • the intermediate sheet 4D When the intermediate sheet 4D is provided between the upper layer sheet 4A and the lower layer sheet 4B, the intermediate sheet 4D can be arbitrarily selected from the materials described in the upper layer sheet 4A.
  • the superabsorbent polymer 4C examples include a cross-linked polyacrylate, a self-crosslinked polyacrylate, a saponified acrylate-vinyl acetate copolymer cross-linked product, and a cross-linked isobutylene / maleic anhydride copolymer.
  • a crosslinked polysulfonate, and a partially crosslinked water-swellable polymer such as polyethylene oxide and polyacrylamide.
  • those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred.
  • the water-absorbing force and the water-absorbing speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient.
  • side nonwoven fabrics 7 and 7 are provided on both sides of the surface side (skin side) of the sanitary napkin 1 along the longitudinal direction and over almost the entire length of the napkin 1, respectively.
  • wing-shaped flaps W and W are formed by a part of the liquid-impermeable back sheet 2 that is also extended sideways.
  • a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of important functions. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the touch feeling, water repellent treatment coated with silicone, paraffin, alkylchromic chloride water repellent, etc. It is desirable to use a nonwoven fabric.
  • a method of polymerizing a compound having a hydrophilic group for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, ,
  • a metal salt such as stannic chloride
  • partially dissolving the surface to make it porous and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic
  • capillary action to make it hydrophilic It is desirable to use a hydrophilic treated non-woven fabric provided with.
  • the inner side of the side nonwoven fabric 7 folds the side nonwoven fabric 7 almost double, and inside the double sheet, in the middle in the height direction, as appropriate at both ends or in the longitudinal direction.
  • One or a plurality of, in the illustrated example, two thread-like elastic elastic members 8 and 8 are disposed, and the double sheet portion is raised on the skin side by the contraction force. , BS is formed.
  • the liquid-permeable surface sheet 3 is a non-porous nonwoven fabric.
  • the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton.
  • a nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used.
  • the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability
  • the thermal bond method and the air-through method are excellent in terms of being bulky and having high compression recovery properties.
  • the non-woven fiber may be either a long fiber or a short fiber, but preferably a short fiber is used in order to give a towel texture.
  • an olefin fiber such as polyethylene or polypropylene having a relatively low melting point.
  • a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can be suitably used.
  • a large number of recesses 10 that are recessed on the non-skin side and surrounded by the ridge-like protrusions 11 that are continuous to the non-skin side in the region of the skin surface of the liquid-permeable surface sheet 3 and including the body fluid discharge site H of the wearer are formed in a continuous lattice pattern. That is, on the skin side surface of the liquid-permeable surface sheet 3, by embossing from the skin side, a large number of recesses 10, 10... Recessed on the non-skin side are formed in a continuous lattice pattern.
  • portions other than the recesses 10, 10... are formed as convex portions 11 relatively projecting toward the skin so as to surround the periphery of the recess 10 in a continuous bowl shape. It has a structure.
  • the concave portion 10 is squeezed at a depth within the thickness range of the liquid-permeable surface sheet 3 by embossing from the skin side surface of the liquid-permeable surface sheet 3. It is the hollow part formed by doing. Therefore, the skin side surface of the liquid-permeable surface sheet 3 is formed in a concavo-convex shape by the concave portions 10, 10. On the other hand, the non-skin side surface of the liquid-permeable surface sheet 3 is formed substantially flat.
  • the convex portion 11 is a portion that protrudes relatively to the skin side from the concave portion 10, and when the concave portion 10 is formed by embossing, the convex portion 11 is a non-pressed portion that is not squeezed at all, or the compressive strength is weaker than the concave portion 10. It consists of a low pressing part.
  • the convex portion 11 continuously surrounds the periphery of the concave portion 10 and is formed in a bowl shape that forms a partition with the adjacent concave portion 10.
  • the lattice pattern formed by these concave portions 10 and convex portions 11 is formed in a region including the body fluid discharge site H of the wearer.
  • the lattice pattern is formed on the entire surface of the liquid-permeable surface sheet 3, but only the intermediate region of the liquid-permeable surface sheet 3 including the body fluid discharge site H of the wearer may be used.
  • the body fluid discharged to the surface of the liquid-permeable surface sheet 3 is temporarily stored in the concave portions 10,. 4 is securely absorbed and retained.
  • the permeation form of the body fluid will be described in comparison with a conventional absorbent article.
  • the liquid-permeable surface sheet is made of a non-woven fabric that does not form the recess 10 as in the present invention.
  • a conventional absorbent article using a fibrous absorbent material in which a superabsorbent polymer is blended in a piled pulp as an absorbent material the body fluid discharged on the surface of the liquid-permeable surface sheet is Quickly penetrates into the absorbent body through the fibers of the porous surface sheet and through a large number of apertures, and is absorbed by the pulp with a relatively high absorption rate and then absorbed and retained by the superabsorbent polymer with a relatively low absorption rate. It takes the form of absorption.
  • a conventional absorbent article using such a fibrous absorbent body is excellent in absorption speed and utilizes the difference in absorption speed between pulp and polymer to ensure that the body fluid is held in the absorbent body.
  • the thickness of the absorbent body has to be increased, and it has been difficult to reduce the thickness.
  • the body fluid discharged to the surface of the liquid-permeable surface sheet quickly passes through the liquid-permeable surface sheet and moves to the polymer sheet.
  • the water-absorbing material is composed only of the polymer, a large amount of body fluid that has permeated the liquid-permeable surface sheet flows into the polymer sheet even though the water absorption rate of the polymer is low.
  • the body fluid that has flowed into the polymer sheet overflows and returns to the surface side, and the body fluid discharged without being transferred to the polymer sheet flows on the surface as it is, so that the diffusion area on the surface tends to increase. is there. Therefore, if the wearer who confirmed the surface of the used absorbent article has a large diffusion area of the body fluid on the surface, it may be an absorbent article with low absorption performance even if leakage does not actually occur. May cause doubts.
  • the body fluid permeation rate into the inside of the top sheet is slightly reduced as compared with the conventional one in which such a recess 10 is not provided. It will be in the state temporarily stored in. For this reason, the penetration rate of the body fluid into the lower polymer sheet 4 is moderately suppressed, and the rate of absorption by the superabsorbent polymer having a lower absorption rate than that of the pulp and the penetration from the liquid-permeable surface sheet 3.
  • the discharged body fluid is temporarily stored in the concave portion 10 surrounded by the bowl-shaped convex portion 11, and the diffusion of the liquid on the surface is minimized.
  • the wearer confirms the diffusion state of the liquid after use, the feeling of anxiety about leakage can be reduced.
  • the body fluid tends to move from the low density region to the high density region due to the density difference. Even with high menstrual blood and the like, it tends to cause a body fluid drawing action.
  • the area of the recess 10 is 1.5 to 20 times, preferably 3 to 10 times that of the protrusion 11. If this area ratio is smaller than 1.5 times, the area of the recess 10 is too small and the effect of storing body fluid is reduced. On the contrary, if it is larger than 20 times, the convex portion 11 is too small and the section between the adjacent concave portions 10 and 10 is likely to be damaged, and the temporarily stored body fluid may flow into the adjacent concave portion 10.
  • the area ratio between the concave portion 10 and the convex portion 11 can be calculated from the ratio of the total area of the entire range in which the concave portion 10 and the convex portion 11 are formed.
  • the bottom surface of the recess 10 is preferably formed in a cross-sectional shape that gradually becomes deeper toward the center of the recess 10 as shown in FIG.
  • the fiber density of the liquid-permeable surface sheet 3 on the lower side of the recess 10 is formed so as to gradually increase from the peripheral part to the central part, and the body fluid is directed from the peripheral part to the central part due to the difference in fiber density. And the liquid does not easily remain between the fibers, and the body fluid does not return to the surface.
  • the bottom surface of the recess 10 is preferably formed in an arc shape that bulges to the non-skin side as shown in FIG. 4 in a cross-sectional view of the liquid-permeable surface sheet 3.
  • the change in the fiber density from the outer peripheral part of the concave part toward the central part of the concave part in the lower liquid-permeable surface sheet 3 gradually increases toward the central part, which is optimal for drawing in body fluid due to the difference in fiber density. It becomes a state.
  • the concave portion 10 preferably forms a welded portion 12 welded to the non-skin side surface of the liquid-permeable surface sheet 3 at the deepest portion of the central portion.
  • the body fluid is easily drawn into the welded portion 12 due to the difference in fiber density, and the body fluid penetrates into the polymer sheet 4 through the welded portion 12.
  • the area of the welded portion 12 is preferably 1 to 10% of the area per recess 10. When it exceeds 10%, since the liquid permeability in the welding part 12 is low, there exists a possibility that the osmosis
  • the surface of the weld portion 12 is formed in a continuous curved line shape from the surrounding shape, but may be formed flat.
  • the area per recess 10 is 30 to 1000 mm 2 , preferably 30 to 300, and more preferably 30 to 150 mm 2 .
  • the volume of the recess 10 can be about 20 mm 3, and about 50 recesses are required to store 1 cc of menstrual blood. 10, 10...
  • the area of the concave portion 10 results in a diffusion area of about 1500 mm 2 (in fact, there is a convex portion 11 between the adjacent concave portions 10, 10. The diffusion area becomes larger by that amount).
  • the diffusion area of 1500 mm 2 in the liquid-permeable surface sheet 3 is close to the size of the boundary as to whether or not an anxiety about leakage occurs when the wearer confirms the used sanitary napkin 1.
  • the area per one recess 10 is preferably 30 mm 2 .
  • the area of the concave portion 10 exceeds 1000 mm 2 , the concave portion 10 is too large, and when the sanitary napkin 1 is curved along the roundness of the body, the shape of the concave portion 10 is likely to change, and the effect of storing body fluid is reduced. There is a risk.
  • the recesses 10 are arranged in a continuous lattice pattern in a plan view from the skin side of the liquid-permeable surface sheet 3.
  • the continuous lattice pattern includes a regular lattice pattern in which a large number of the recesses 10, 10... Are arranged in the longitudinal direction or the width direction of the sanitary napkin 1, and a rhombus pattern in which a large number of the recesses 10, 10. Is included.
  • the concave portions 10 are arranged at a predetermined interval, and the convex portions 11 are provided between the adjacent concave portions 10 and 10.
  • the concave portion 10 is formed in a substantially diamond shape in plan view, and a large number of concave portions 10, 10. This pattern is desirable because the appearance of the lattice pattern is good and the body fluid can easily flow into the concave portion 10 and the liquid diffusion on the surface can be suppressed to a low level.
  • the rhombus shape of the recess 10 is formed long in the longitudinal direction of the sanitary napkin 1, but may be formed long in the width direction, or may be formed in substantially the same length in the longitudinal direction and the width direction.
  • the concave portion 10 is formed in an arbitrary polygonal shape such as a hexagon shown in FIG. 7A or a triangle shown in FIG. 7B, and continuously in a regular lattice pattern or a rhombus pattern. Many can be arranged. Further, it may be a circle shown in FIG. 7C or an ellipse shown in FIG. 7D.
  • the convex portions 11 may be formed with substantially equal widths (see FIGS. 3 and 7A and 7B), or may be formed with different widths (FIGS. 7C and 7D). reference).
  • the width of the convex portion 11 is preferably about 0.5 to 10 mm, particularly about 0.5 to 3 mm.
  • the embossing roll having a large number of embossing convex portions corresponding to the concave portions 10 on the surface and a flat roll having a flat surface. This can be achieved by passing a non-woven sheet.
  • the liquid-permeable surface sheet 3 may have a single-layer structure composed of a single-layer sheet as shown in FIG. 8 (A), or a plurality of sheets as shown in FIG. 8 (B).
  • a laminated multilayer structure may be used.
  • the liquid-permeable surface sheet 3 has a multilayer structure, it is possible to add various performances by using sheets having different configurations in each layer. For example, by using a fiber having a higher fiber density on the non-skin side or a fiber having a smaller fiber thickness than the skin side, by providing a fiber density change from the skin side to the non-skin side in advance, to the non-skin side The body fluid drawing force can be increased.
  • enhanced pulling force of the fibers consists air-through nonwoven fabric skin side layer are mixed fibers of thickness 3.0 dtex / 2.0 dtex, each basis weight 6g / m 2 / 12g / m 2, the non The skin side layer may have a two-layer structure made of an air-through nonwoven fabric having a fiber thickness of 1.8 dtex and a basis weight of 18 g / m 2 .
  • the non-skin side layer has a core-sheath type bicomponent nonwoven fabric or side-by-side type fiber in which a fiber having a high melting point is a core and a fiber having a low melting point is a sheath.
  • a nonwoven fabric made of a composite fiber such as a split fiber can be used.
  • the liquid-permeable surface sheet 3 has a multilayer structure
  • a non-open (non-porous) nonwoven fabric for at least the layer constituting the skin contact surface layer.
  • the non-perforated hole does not mean that there is essentially no space formed between the fibers of the nonwoven fabric, but an opening formed mechanically by post-processing such as pin piercing after forming the nonwoven fabric sheet. It does not have a hole, that is, an opening provided linearly from the skin side surface to the non-skin side surface of the nonwoven fabric sheet.
  • the layer on the non-skin side from the skin contact surface layer may be a perforated sheet subjected to a perforation process.

Abstract

[Problème] Le problème décrit par la présente invention est de faciliter l'aspiration d'un fluide corporel tout en supprimant la diffusion de liquide sur une surface et de réduire l'anxiété autour d'une fuite. [Solution] La solution selon l'invention porte sur une serviette hygiénique 1 dans laquelle une feuille de polymère 4 qui comprend un polymère superabsorbant disposé entre deux couches de feuilles est interposée entre une feuille de surface avers 3 perméable aux liquides et une feuille de surface arrière 2 imperméable aux liquides. Un grand nombre de parties concaves 10, 10… qui s'endent dans le côté non peau et qui sont entourées par des parties convexes 11 en forme de crête, qui produisent un périmètre continu, forment un motif en treillis continu dans une région sur la surface côté peau de la feuille de surface avers 3 perméable aux liquides qui comprend un site de décharge de fluide corporel.
PCT/JP2017/044837 2016-12-16 2017-12-14 Article absorbant WO2018110629A1 (fr)

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WO2024059108A1 (fr) * 2022-09-13 2024-03-21 Kimberly-Clark Worldwide, Inc. Produit de mouchoir en papier multicouche microgaufré

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10508768A (ja) * 1994-11-09 1998-09-02 エスシーエー メールンリユーケ アーベー 吸収物品のための表面シート及びその製造方法
JPH1189879A (ja) * 1997-09-22 1999-04-06 Uni Charm Corp 体液吸収性物品の透液性表面シートおよび該シートの製造方法
JP2001095845A (ja) * 1999-10-04 2001-04-10 Uni Charm Corp 吸収性物品およびその製造方法
JP2005177078A (ja) * 2003-12-18 2005-07-07 Kao Corp 吸収性物品
JP2005348938A (ja) * 2004-06-10 2005-12-22 Daio Paper Corp 吸収性物品
JP2008220524A (ja) * 2007-03-09 2008-09-25 Oji Nepia Kk 水様便漏れ防止シート及びこれを用いた吸収性物品
US20160074237A1 (en) * 2014-09-12 2016-03-17 The Procter & Gamble Company Process for making an absorbent article comprising a topsheet/acquisition layer laminate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10508768A (ja) * 1994-11-09 1998-09-02 エスシーエー メールンリユーケ アーベー 吸収物品のための表面シート及びその製造方法
JPH1189879A (ja) * 1997-09-22 1999-04-06 Uni Charm Corp 体液吸収性物品の透液性表面シートおよび該シートの製造方法
JP2001095845A (ja) * 1999-10-04 2001-04-10 Uni Charm Corp 吸収性物品およびその製造方法
JP2005177078A (ja) * 2003-12-18 2005-07-07 Kao Corp 吸収性物品
JP2005348938A (ja) * 2004-06-10 2005-12-22 Daio Paper Corp 吸収性物品
JP2008220524A (ja) * 2007-03-09 2008-09-25 Oji Nepia Kk 水様便漏れ防止シート及びこれを用いた吸収性物品
US20160074237A1 (en) * 2014-09-12 2016-03-17 The Procter & Gamble Company Process for making an absorbent article comprising a topsheet/acquisition layer laminate

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