WO2023002691A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2023002691A1
WO2023002691A1 PCT/JP2022/012088 JP2022012088W WO2023002691A1 WO 2023002691 A1 WO2023002691 A1 WO 2023002691A1 JP 2022012088 W JP2022012088 W JP 2022012088W WO 2023002691 A1 WO2023002691 A1 WO 2023002691A1
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WO
WIPO (PCT)
Prior art keywords
thread
elastic
sheet
longitudinal direction
width direction
Prior art date
Application number
PCT/JP2022/012088
Other languages
English (en)
Japanese (ja)
Inventor
由美 則元
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 WO2023002691A1 publication Critical patent/WO2023002691A1/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
    • A61F13/45—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
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • 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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means

Definitions

  • the present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads. More specifically, the present invention relates to three-dimensional gathers that stand up against the skin due to the contractile force of thread-like elastic stretchable members on both sides of the skin-contacting side. It relates to an absorbent article in which is formed.
  • an absorbent article N for example, as shown in FIGS. It is known to interpose an absorbent body 52 made of cotton-like pulp or the like between it and a liquid surface sheet 51, and to arrange side sheets 53, 53 made of nonwoven fabric on both sides of the skin-contacting side.
  • the inner portion 53a of the side sheet 53 is folded back in the width direction to form a folded portion, and one or more strips are formed between the side sheets 53, 53 of the folded portion along the longitudinal direction.
  • the thread-like elastic stretchable members 54 By arranging the thread-like elastic stretchable members 54 in a stretched state, three-dimensional gathers 55, 55 that stand up on the skin side due to the contractile force of the thread-like elastic stretchable members 54 are formed over a predetermined section in the longitudinal direction.
  • the side sheets 53 of the absorbent article N form three-dimensional gathers 55 over a predetermined longitudinal section (three-dimensional gather forming section) including at least a section corresponding to the bodily fluid discharge region H of the wearer.
  • a predetermined longitudinal section three-dimensional gather forming section
  • the thread-like elastic stretchable member 54 is attached to the side sheet 53 so that the contractile force of the thread-like elastic stretchable member 54 does not act on the side sheet 53 .
  • the side sheet 53 is folded and laminated on the side of the absorbent body 52 and joined.
  • Patent Document 1 discloses an absorbent article having a pleated structure with high alignment and excellent appearance.
  • the disclosed pleated structure has a compound stretchable part that can stretch in one direction, and the compound stretchable part comprises two sheet materials and is disposed between the two sheet materials.
  • the plurality of elastic members extend along the one direction and are spaced apart in a direction orthogonal to the one direction.
  • At least one of the two sheet materials has a plurality of high-density portions in which the two sheet materials are not directly joined together, and the high-density portions include a plurality of high-density portions. of the elastic members, and is intermittently formed in plurality in the extending direction of the one elastic member.
  • one sheet material has a fold structure deformed so as to have a plurality of recessed streaks having a high-density portion at the bottom and protruding streaks located between the recessed streaks. is formed.
  • the appearance of the three-dimensional gathers is excellent in the three-dimensional gathers forming section where the fold structure is formed in the side sheets by the contractile force of the thread-like elastic elastic members.
  • the thread-shaped elastic stretchable member is not attached during the manufacturing process, for example.
  • the end portions of the thread-like elastic stretchable members were vigorously contracted, and as shown in FIG. 9, the side sheets were entangled or twisted, and the appearance was poor.
  • Such a phenomenon tends to occur on the rear side where the length of the fixed section is longer than on the front side.
  • Patent Document 2 discloses an elastic body in which a leak-proof portion is arranged along the longitudinal direction of the absorbent article. and a sheet arranged along the longitudinal direction to wrap the elastic body and at least a part of which is fixed to the surface sheet.
  • the leak-proof part has a central region in the longitudinal direction and a pair of end regions located outside the central region in the longitudinal direction, and the elastic body comprises at least the boundary between the central region and the end regions, It has a fixed portion fixed to the sheet while the elastic body is stretched in the longitudinal direction, and a free end which is located outside the fixed portion in the longitudinal direction and is not fixed to the sheet.
  • the end region has a bonded portion subjected to bonding processing for bonding portions of the sheets facing each other and a non-bonded portion not subjected to bonding processing, and the free end is connected to the non-bonded portion. are arranged.
  • Patent Document 2 As shown in paragraph [0073] of the specification of Patent Document 2 and FIG. It is described that they may be provided on all parts other than the contacting parts. By adopting this configuration, it is believed that the ends of the elastic body can be prevented from being entangled or twisted.
  • an object of one aspect of the present invention is to provide an absorbent article that improves the alignment of the end portions of the thread-like elastic stretchable members and has a good touch.
  • a side seat is arranged along the longitudinal direction on both sides of the skin contact surface side, and a double seat portion is formed on the inner side in the width direction; and a thread-like elastic stretchable member arranged along the longitudinal direction between the double sheet portions, and the side sheet is stretched in a predetermined longitudinal section including the wearer's bodily fluid discharge part by the contractile force of the thread-like elastic stretchable member.
  • a three-dimensional gather that stands up on the skin side is formed in the inner side part of the double sheet part integrally bulging to the skin side at least behind the section in which the three-dimensional gather is formed.
  • a plurality of portions are arranged along the longitudinal direction, and an alignment joint portion is provided in which a bonding portion for bonding the side sheets of the double sheet portion is arranged so as to fill the gap between the convex portions.
  • the absorbent article is provided, wherein the thread-like elastic stretchable member is provided along the longitudinal direction at a portion other than the alignment joint portion in a state in which the thread-like elastic stretchable member is not joined to the side sheet.
  • an absorbent article that prevents tangling and twisting of the end portions of the thread-like elastic stretchable member and has a good touch.
  • FIG. 2 is a view taken along line II-II of FIG. 1;
  • FIG. 2 is a view taken along line III-III in FIG. 1;
  • 4 is an enlarged plan view of a portion provided with alignment joints 10.
  • FIG. FIG. 5 is a view taken along line VV in FIG. 4;
  • FIG. 11 is a plan view showing a modified example of the convex portion 11;
  • FIG. 8 is an enlarged plan view of a portion provided with alignment joints 10 according to a modification;
  • Fig. 10 is an exploded view of a sanitary napkin 1 according to another embodiment;
  • FIG. 2 is a development view showing a conventional absorbent article N;
  • FIG. 10 is a view taken along line XX of FIG. 9;
  • the sanitary napkin 1 comprises, as shown in FIGS. ), an absorbent body 4 made of cotton-like pulp or synthetic pulp, etc., interposed between the two sheets 2, 3; A side seat 7 is provided over substantially the entire length in the longitudinal direction.
  • a joining means such as hot-melt adhesive, heat sealing, or ultrasonic sealing.
  • the back sheet 2 extending laterally beyond the absorbent body 4 and the side sheets 7 are joined to the side sheets 7 by a joining means such as a hot-melt adhesive, heat sealing, or ultrasonic sealing.
  • a flap portion is formed in which no absorber is interposed.
  • the absorbent body 4 is surrounded by an enveloping sheet 5 made of crepe paper, non-woven fabric, or the like in order to retain the shape of the absorbent body 4 and improve diffusibility, but the enclosing sheet 5 is not provided.
  • a second sheet made of hydrophilic non-woven fabric or the like having substantially the same shape as the topsheet 3 may be disposed adjacent to the non-skin side of the topsheet 3 .
  • a sheet material having at least water impermeability such as polyethylene is used for the back sheet 2, but it is desirable to use a material having moisture permeability from the viewpoint of preventing stuffiness.
  • the water-impermeable/moisture-permeable sheet material is produced by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction.
  • a sheet is preferably used.
  • One or a plurality of adhesive layers are formed along the longitudinal direction of the napkin on the non-skin side (outer surface) of the back sheet 2 of the main body portion where the absorbent body 4 is interposed, and when worn on the body
  • the napkin 1 for use is fixed to the shorts.
  • a polylaminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric may be used as the back sheet 2.
  • a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used.
  • Materials constituting the nonwoven fabric include olefin-based, polyester-based, polyamide-based synthetic fibers such as polyethylene or polypropylene, 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 spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used.
  • the spunlace method is superior in flexibility and drapeability
  • the thermal bond method is superior in bulkiness and compression recovery.
  • the fibers of the non-woven fabric may be either long fibers or short fibers, but preferably short fibers are used in order to produce the feel of a terry cloth.
  • olefin fibers such as polyethylene or polypropylene having a relatively low melting point.
  • composite fibers of core-sheath type fibers, side-by-side type fibers, and split type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath can also be preferably used.
  • the absorbent body 4 interposed between the backsheet 2 and the topsheet 3 is made of, for example, cotton pulp and a water-absorbent polymer.
  • the water-absorbing polymer is mixed in the pulp constituting the absorbent body, for example, as granular powder.
  • Pulp includes chemical pulp obtained from wood, cellulose fiber such as dissolving pulp, and artificial cellulose fiber such as rayon and acetate, and softwood pulp with long fiber length is more functional and expensive than hardwood pulp. is preferably used in terms of
  • Synthetic fibers may also be mixed in the absorber 4.
  • Synthetic fibers may be, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof. There may be.
  • composite fibers such as core-sheath type fibers, side-by-side type fibers, and split type fibers having a high-melting-point fiber as a core and a low-melting-point fiber as a sheath can also be used.
  • the synthetic fiber is a hydrophobic fiber, it is preferably surface-treated with a hydrophilizing agent so as to have affinity for body fluids.
  • the width dimension of the surface sheet 3 is slightly longer than the width of the absorbent body 4, as shown in the cross-sectional views of FIGS.
  • a side sheet 7 different from the surface sheet 3 is arranged on the outer side.
  • the side sheet 7 is made of a nonwoven fabric material that has undergone an appropriate water-repellent treatment or hydrophilic treatment in order to prevent permeation of menstrual blood, vaginal discharge, etc., or to improve the feel of the skin. configured as follows.
  • the side sheet 7 may be made of natural fiber, synthetic fiber, regenerated fiber, or the like, and may be formed by an appropriate processing method.
  • non-woven fabric with a basis weight of 13 to 23 g/m 2 , and in order to reliably prevent permeation of bodily fluids, silicone-based, paraffin-based, alkylchromic chloride-based water repellents, etc.
  • a water-repellent nonwoven fabric coated with is preferably used.
  • the side sheet 7 is formed by applying an adhesive such as a hot-melt adhesive over a range from a predetermined inner position to the outer edge of the back sheet 2 in a portion outside the intermediate portion in the width direction. It is at least partially adhered to the backsheet 2 .
  • the laminated sheet portions of the side sheets 7 and the back sheet 2 form side flap portions on both sides of the absorbent body 4 in which the absorbent body 4 is not interposed.
  • the side flap portions are a pair of left and right wing-shaped flap portions which extend from the side edge of the absorbent body 4 at a side portion position substantially corresponding to the bodily fluid discharge portion H of the wearer. W, forming W. Further, the side flaps include a pair of left and right hip hold flaps WB , WB , which extend from the side edges of the absorbent body 4 to a position on the buttock side (rear side). Form.
  • An adhesive layer (not shown) is provided on the outer surface side (the outer surface side of the back sheet 2) of these wing-shaped flap portions W, W and the hip hold flap portions W B , W B .
  • the wing-shaped flap portions W, W When worn on shorts, the wing-shaped flap portions W, W are folded back to the opposite side (back sheet 2 side) at the folding line RL position (FIG. 1) of the base end portion, and wrapped around the crotch portion of the shorts and fastened.
  • the hip hold flap portion WB is attached to the inner surface of the shorts and covers the wearer's buttocks when worn.
  • the inner side portion 7a of the side seat 7 is folded back in the width direction to form a double seat portion (a portion where the side seats are double stacked).
  • a double seat portion a portion where the side seats are double stacked.
  • the thread-like elastic stretchable members 9, 9... are joined to the side sheets 7, 7 in a stretched state at the intermediate portion in the longitudinal direction including the bodily fluid discharge portion H of the wearer at both ends of the section or at appropriate positions in the longitudinal direction. ing.
  • the double sheet portion of the side sheet 7 is an intermediate portion in the longitudinal direction including the bodily fluid discharge portion H of the wearer, and in the section where the thread-like elastic elastic members 9, 9 . . . 2, they are arranged in a state in which they can protrude toward the wearer's skin side without being joined to each other.
  • the section where the thread-like elastic elastic members 9, 9... are not joined to the side sheets, which are on the end side in the longitudinal direction of the section, as shown in FIG. , and is adhered to the absorbent body 4 side.
  • the "inner side portion 7a" of the side seat 7 is a portion on the inner side in the width direction of the side seat 7, and as described above, the portion including the double sheet portion for forming the three-dimensional gathers BS. is.
  • the skin-contacting surface side of the topsheet 3 is formed with compressed grooves 6 in a predetermined form.
  • the pressed grooves 6 are recessed grooves formed by pressing the topsheet 3 from the skin-contacting surface side so that the topsheet 3 and the absorbent body 4 are integrally recessed toward the backsheet 2 side.
  • the compressed grooves 6 are provided in pairs along the longitudinal direction on both sides of at least the area corresponding to the bodily fluid discharge portion H of the wearer.
  • the double sheet portion of the side sheet 7 is integrated with the fixed section at least on the rear side of the three-dimensional gather forming section, that is, the double sheet
  • a plurality of projections 11 are arranged along the longitudinal direction, the entirety of which bulges toward the skin.
  • Alignment joints 10 are formed by arranging bonding portions 12 for bonding the side sheets 7, 7 of the double sheet portion so as to fill the gaps between the convex portions 11, 11, and are spaced apart in the width direction. Multiple are arranged side by side. Furthermore, thread-like elastic stretchable members 9, 9, . . .
  • the side sheets 7, 7 forming the double sheet portion are joined together by the convex portion 11 and the adhesive portion 12, so that the joint portion 10 for alignment contains the thread-like elastic elastic member 9. It is designed not to let you in. On the other hand, since the side sheets 7, 7 forming the double sheet portion are not joined to each other in other parts, the thread-like elastic stretchable member 9 can enter.
  • the joint portion 10 for alignment is formed by combining the convex portion 11 and the bonding portion 12, and the bonding portion 12 is provided so as to fill the gap between the convex portions 11, the thread-like elastic elastic member 9 is formed by the bonding portion 12.
  • the room for entering the alignment joint 10 is completely or almost blocked, and the alignment of the thread-like elastic stretchable member 9 can be more reliably improved. If the adhesive portion 12 were not provided, the end portion would contract vigorously when the filamentous elastic stretchable member 9 was cut, and the end portion would undulate due to the shrinkage force at that time, and the gap between the convex portions 11, 11 would be formed. likely to enter.
  • the undulation of the thread-like elastic stretchable member 9 causes the side sheets 7, 7 to be disconnected from each other, resulting in alignment bonding. There is a risk that the thread-like elastic elastic member 9 may enter the portion 10 .
  • the alignment joints 10 are formed with protrusions 11 formed by bulging the side sheets 7 toward the skin, the tips of the protrusions 11 come into contact with the wearer's skin. Therefore, the outline of the convex portion 11 hardened by heat sealing, the adhesive portion 12 hardened by the adhesive, and the like are structured so as to be less likely to come into contact with the skin surface, and a good touch can be realized.
  • the thread-like elastic stretchable member 9 is arranged in a state in which it is not joined to the side sheet 7, so that the contractile force of the thread-like elastic stretchable member 9 bends the end of the sanitary napkin 1. Extreme inward curving is suppressed, and deterioration of wearing comfort is suppressed.
  • the inner side of the side sheet 7 in the width direction is folded back in the width direction with the thread-like elastic elastic members 9, 9, . . .
  • the side sheet 7 is placed between a first embossing roll having protrusions corresponding to the protrusions 11 and a second embossing roll having surface depressions corresponding to the protrusions of the first embossing roll. and applying heat or ultrasonic waves to at least the contoured portion when the protrusions of the first embossing roll and the depressions on the surface of the second embossing roll are engaged with each other.
  • the convex portion 11 has a contour line formed by a closed curve, and a plurality of such convex portions 11 are arranged along the longitudinal direction.
  • the planar shape of the convex portion 11 is circular, but as shown in FIG. etc. In this way, by forming the outline of the convex portion 11 with a closed curve, even if the side sheet 7 is stretched during the manufacturing of the sanitary napkin 1 or the wearing of the sanitary napkin 1, the convex portion 11 can be It is easy to maintain the state of protruding to the skin side, and the feeling of wearing can be improved more reliably.
  • the depression in the width direction is a continuous contour line on one side of the protrusions 11, 11 in the width direction, It may be a region in a plan view surrounded by a straight line connecting the side edges of the protrusions 11 , 11 on one side in the width direction (positions protruding to one side in the width direction most).
  • the center line passing through the width direction center of the convex portions 11, 11 may be a region in a plan view surrounded by a contour line and a straight line connecting the side edges of the protrusions 11 , 11 on one side in the width direction.
  • the dimensions of the projections 11 are preferably 5 mm or less in each of the longitudinal direction and the width direction in order to reduce the contact area with the skin surface when worn.
  • the height of the convex portion 11 is preferably set to a height such that the outline of the convex portion 11 and the adhesive portion 12 are less likely to come into contact with the skin surface when worn. Specifically, the height is 1.5 to 5 mm. It's okay.
  • the convex portions 11, 11 adjacent to each other in the longitudinal direction may be arranged in a row so that their outlines are connected to each other, or may be intermittently arranged with a predetermined distance therebetween. As shown in FIG. 4, when the contour lines of the projections 11 adjacent in the longitudinal direction are connected to each other, the shape of the projections 11 can be adjusted when the sanitary napkin 1 is manufactured or worn. It is preferable because it becomes easier to hold.
  • the adhesive portions 12 are arranged on at least both side portions between the adjacent convex portions 11, 11, respectively.
  • the adhesive part 12 can be formed by applying a hot-melt adhesive or the like between the double sheet parts of the side sheet 7 .
  • the adhesive portion 12 is provided by applying an adhesive to at least one of the surfaces of the side sheet portions that are to form the double sheet portion, which face each other due to the formation of the double sheet portion. can be done.
  • the adhesive portions 12 are arranged so as to fill at least the gaps on both sides between the convex portions 11, 11 adjacent to each other in the longitudinal direction so that both side edges of the joint portion 10 for alignment are substantially straight along the longitudinal direction.
  • a longitudinal straight line extending along the alignment of the right edges (positions protruding to the rightmost side) of the projections 11, 11, . . .
  • the adhesive part 12 is arranged so as to fill at least the area without the convex parts 11, 11 ... in the area between the left edge (the position that protrudes leftmost) and the longitudinal straight line extending along the line.
  • the bonding portion 12 is preferably arranged at a position not overlapping the convex portion 11, but may overlap the convex portion 11 to some extent. However, if the adhesive portion 12 overlaps the top portion of the convex portion 11, the adhesive may harden and the top portion of the convex portion 11 in contact with the skin surface may become hard. be arranged so that they do not overlap.
  • the adhesive portion 12 is a triangle that tapers toward the center in the width direction, or a side facing the contour line of the convex portion 11 is inward. It can be formed in a substantially triangular shape with a bulging curve.
  • the bonding portions 12 are arranged in pairs on both sides between the convex portions 11, 11 adjacent in the longitudinal direction.
  • the bonding portion that connects the left and right bonding portions 12, 12 between the projections 11, 11 adjacent to each other in the longitudinal direction is positioned at the center.
  • the integral bonding portion 12 may be formed.
  • the adhesive portions 12 may be arranged on both sides between the convex portions 11, 11 adjacent in the longitudinal direction so as not to create any recesses or gaps without the adhesive.
  • a plurality of alignment joints 10 consisting of the convex portions 11 and the adhesive portions 12 described above are arranged side by side at predetermined intervals in the width direction, three in the illustrated example.
  • the separation width of the alignment joints 10 is defined by the straight line extending along the longitudinal alignment of the side edges of the protrusions included in one alignment joint and the alignment joints adjacent to the one alignment joint. It can be the distance between a straight line extending along the longitudinal alignment of the side edge of the convex portion included in the portion facing the one alignment joint.
  • the separation width between the adjacent alignment joints 10, 10 is formed to be larger than the thickness of the front elastic elastic member 9, and is preferably about 1.5 to 3 times the thickness of the thread-like elastic elastic member 9. preferable.
  • the separation width is too small, making it difficult to manufacture. , 10 . Therefore, there are cases where the thread-like elastic stretchable member 9 continues to be stretched even after cutting, making it impossible to form a desired three-dimensional gather.
  • it is larger than 3 times the thickness of the filamentous elastic stretchable member 9 when the filamentous elastic stretchable member 9 is cut and the ends of the filamentous elastic stretchable member 9 are vigorously contracted, the alignment joints 10, 10 will not be in contact with each other. There is a risk that undulations and twists will occur at the edges and the alignment will be degraded.
  • the length of the alignment joint 10 in the longitudinal direction is obtained when the ends of the thread-like elastic elastic members 9 are arranged substantially straight along the longitudinal direction from immediately behind the gather forming section in a natural state where no tensile force acts. Specifically, it is preferable to form the sanitary napkin 1 with a length of about 1 ⁇ 3 of the total length of the sanitary napkin 1 from the immediately rear portion of the gather forming section. By forming the aligning joints 10 in this range, the end portions of the thread-like elastic stretchable members 9 are well aligned, and the fit around the legs is not affected.
  • the alignment joints 10, 10, which are arranged side by side in the width direction, are located at different positions in the width direction, specifically, between the adjacent alignment joints 10, 10.
  • the projections 11, 11 At a portion where the convex portions 11 and 11 are adjacent to each other, the side sheet 7 on the upper layer side is pressed toward the lower layer side at the contour portion of the convex portion 11, thereby narrowing the space between the side sheets 7 and 7 on the upper and lower layers.
  • the braking force when the thread-like elastic stretchable member 9 contracts compressing the shrinkage of the thread-like elastic stretchable member 9) compared to the portion where the adhesive portion 12 where the upper and lower side sheets 7, 7 are simply laminated is adjacent. force
  • the alignment joints 10 may be arranged on both sides of the thread-like elastic elastic member 9 .
  • the alignment joint portion 10 may be arranged only on one side of the thread-like elastic stretchable member 9 . This is because the upright tip side serves as the folded portion of the side sheet 7, and undulations and twists of the thread-like elastic stretchable members 9 do not occur or hardly occur on the upright tip side. More specifically, as shown in FIGS. 4 and 7, an alignment joint is provided on the left side (opposite to the standing tip side) of the thread-like stretchable elastic member 9 on the rightmost side (outer side in the width direction) of the drawing. 10 is arranged, but the joint part 10 for alignment is not arranged on the right side (upright tip end side) of the thread-like stretchable elastic member 9 .
  • the manufacturing process of the portion related to the alignment joints 10 will be described.
  • the side sheet 7 is folded back in the width direction to form a double sheet portion.
  • the side sheet 7 is passed between the first embossing roll and the second embossing roll to form the protrusions 11 , and then joined to both sides of the top sheet 3 .
  • it is cut along the outline of the product. Simultaneously with this cutting, the thread-like elastic elastic members 9, 9, . . .
  • the thread-like elastic elastic members 9, 9... may have the same white color as that of the side sheet 7, but may have a color other than white, such as light blue, in order to clearly see the state in which the ends are aligned. .
  • the alignment joint 10 is provided only on the rear side of the three-dimensional gather forming section, but it can also be provided on the front side of the three-dimensional gather forming section.
  • a plurality (three) of thread-like elastic elastic members 9 are arranged, and a plurality (three) of alignment joints 10 are arranged side by side at intervals in the width direction.
  • one line of thread-like elastic stretchable member 9 is arranged at the standing tip end of the three-dimensional gather forming section, and the alignment joint 10 is located on the side opposite to the standing tip side (the folded end side of the side sheet 7).
  • One may be provided.
  • a side seat is arranged along the longitudinal direction on both sides of the skin contact surface side, and a double sheet portion is formed on the inner side in the width direction, and the double sheet portion and a thread-like elastic stretchable member arranged along the longitudinal direction between the side sheets, and the inner side of the side sheet in a predetermined longitudinal section including the wearer's bodily fluid discharge part due to the contractile force of the thread-like elastic stretchable member.
  • a three-dimensional gather is formed so that a portion of the sheet stands upright on the skin side, and at least on the rear side of the section in which the three-dimensional gather is formed, a convex portion formed by integrally swelling the double sheet portion toward the skin is formed in the longitudinal direction.
  • a plurality of aligned joints are arranged along the ridges and are arranged so as to fill the gaps between the convex portions for bonding the side sheets of the double sheet portion to each other.
  • An absorbent article is provided, wherein an elastic stretchable member is provided along the longitudinal direction at a portion other than the alignment joint portion in a state in which it is not joined to the side sheet.
  • the convex portion integrally bulging toward the skin side of the double sheet portion is formed in the longitudinal direction.
  • a plurality of joints for aligning are arranged along the line and are arranged so as to fill the gaps between the convex portions for bonding the side sheets of the double sheet portion to each other, and the filamentous elastic
  • a stretchable member is provided along the longitudinal direction at a portion other than the alignment joint portion in a state in which it is not joined to the side sheet.
  • the aligning joints suppress waviness in the width direction, so that the ends of the thread-like elastic stretchable members can be cut. Alignment of parts can be improved.
  • the convex portion has a contour line formed by a closing curve, so that even if the side sheet is stretched during the manufacturing process of the absorbent article or when the absorbent article is worn, a predetermined stress is applied. It is difficult to concentrate on the part of the skin, and the shape of the convex portion bulging toward the skin is easily maintained, so that a good wearing feeling can be obtained more reliably.
  • the arrangement of the bonding portions is specifically defined, and the bonding portions are disposed in recesses in the width direction between adjacent convex portions in the longitudinal direction.
  • Appendix 6 As a mode according to appendix 6, there is provided the absorbent article according to any one of appendices 1 to 5, wherein the filamentous elastic stretchable member has a color other than white.
  • appendix 6 is intended for cases where a color other than white is used as the thread-like elastic stretchable member, because tangling and twisting of the ends of the thread-like elastic stretchable member are more conspicuous.

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  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Article absorbant comprenant : des feuilles latérales (7) disposées respectivement sur les deux sections latérales d'un côté de surface en contact avec la peau et ayant des parties de double feuille formées vers l'intérieur dans le sens de la largeur ; et un élément étirable élastique filiforme (9) disposé entre les parties de double feuille. Des fronces tridimensionnelles où une section côté intérieur (7a) de la feuille latérale se tient du côté peau sont formées en raison d'une force de contraction de l'élément étirable élastique filiforme (9). Une partie de jonction d'alignement (10) est disposée au moins sur le côté arrière de la section de formation de fronces tridimensionnelles, et est formée par une pluralité de saillies (11) qui sont disposées le long de la direction longitudinale et amènent les parties de double feuille des feuilles latérales (7) à se bomber d'un seul tenant vers le côté peau, et des sections adhésives (12) à adhérer ensemble aux feuilles latérales (7, 7) de façon à remplir des espaces entre les saillies (11, 11). L'élément étirable élastique filiforme (9) est disposé le long de la direction longitudinale au niveau d'un site autre que la partie de jonction d'alignement (10) dans un état non relié aux feuilles latérales (7).
PCT/JP2022/012088 2021-07-21 2022-03-16 Article absorbant WO2023002691A1 (fr)

Applications Claiming Priority (2)

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JP2021-120157 2021-07-21
JP2021120157A JP7516320B2 (ja) 2021-07-21 2021-07-21 吸収性物品

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WO2023002691A1 true WO2023002691A1 (fr) 2023-01-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000079141A (ja) * 1999-06-14 2000-03-21 Kao Corp つかいすておむつ
JP2009511159A (ja) * 2005-10-14 2009-03-19 ザ プロクター アンド ギャンブル カンパニー バリアレッグカフ構造体及び弾性的に伸縮可能なサイドパネルを含む吸収性物品
WO2010134480A1 (fr) * 2009-05-18 2010-11-25 ユニ・チャーム株式会社 Article absorbant
JP2013188437A (ja) * 2012-03-15 2013-09-26 Daio Paper Corp パンツタイプ使い捨ておむつ
WO2020027051A1 (fr) * 2018-07-30 2020-02-06 大王製紙株式会社 Article absorbant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000079141A (ja) * 1999-06-14 2000-03-21 Kao Corp つかいすておむつ
JP2009511159A (ja) * 2005-10-14 2009-03-19 ザ プロクター アンド ギャンブル カンパニー バリアレッグカフ構造体及び弾性的に伸縮可能なサイドパネルを含む吸収性物品
WO2010134480A1 (fr) * 2009-05-18 2010-11-25 ユニ・チャーム株式会社 Article absorbant
JP2013188437A (ja) * 2012-03-15 2013-09-26 Daio Paper Corp パンツタイプ使い捨ておむつ
WO2020027051A1 (fr) * 2018-07-30 2020-02-06 大王製紙株式会社 Article absorbant

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JP7516320B2 (ja) 2024-07-16
JP2023016093A (ja) 2023-02-02

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