JP7157676B2 - absorbent article - Google Patents

Description

The present invention mainly relates to absorbent articles such as sanitary napkins, pantyhose sheets, incontinence pads, and toiletries. The present invention relates to an absorbent article in which three-dimensional gathers are formed.

Conventionally, the absorbent article is made of cotton-like pulp or the like between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable top sheet such as a nonwoven fabric or a liquid-permeable plastic sheet. There is known one in which an absorber is interposed.

In particular, in sanitary napkins for night use, in order to prevent side leakage, in which body fluid such as menstrual blood flows in the width direction and leaks from the side edges, there is a skin Many products with three-dimensional gathers protruding to the side are provided on the market.

As the three-dimensional gather, the nonwoven fabric for forming the gather is folded in two or three and joined to the absorbent body at both ends in the longitudinal direction of the absorbent article, so that the tip forms a free end in the intermediate part in the longitudinal direction. In this way, there are standing wall-shaped three-dimensional gathers that stand up on the skin side and loop-shaped three-dimensional gathers that form a hollow loop shape and protrude toward the skin side (for example, Patent Documents 1 and 2 below).

Japanese Patent No. 5123583 Japanese Patent No. 5119041

The standing wall-shaped three-dimensional gathers have the advantage of increasing the standing height to the skin side, but have the drawback of being prone to falling down in the width direction and causing leakage of body fluids and discomfort when worn in a collapsed state. rice field.

On the other hand, the loop-shaped three-dimensional gathers as described in Patent Documents 1 and 2 are less likely to collapse in the width direction, but the height of the protrusion toward the skin is insufficient, and the loop-shaped gathers are formed with the skin surface when worn. There was a risk that a gap would be created between the three-dimensional gathers and body fluids would leak through this gap.

In addition, in the loop-shaped three-dimensional gathers described in Patent Documents 1 and 2, the sheet member forming the loop-shaped three-dimensional gathers is pulled up to the wearer's skin side mainly by the contractile force of the thread-like elastic member arranged at the upper part of the loop portion. Such a loop is formed only in a section of the wearer's crotch region where the absorbent article is largely curved and deformed in the front-rear direction. And in the rear section, the contractile force of the filamentous elastic member on the upper portion of the loop portion does not act so much, and the loop portion is less likely to be formed. In addition, if the tension of the thread-like elastic member is increased in order to increase the protrusion height of the loop portion, there is a possibility that the feeling of discomfort may be caused due to poor contact with the skin.

Therefore, the main object of the present invention is to provide an absorbent article having hollow loop-shaped three-dimensional gathers in which the projection height of the three-dimensional gathers is increased to prevent leakage and reduce discomfort. It is in.

In order to solve the above problems, the present invention according to claim 1 is an absorbent article in which hollow loop-shaped three-dimensional gathers projecting toward the wearer's skin are formed on both sides in the longitudinal direction on the side of the skin contacting surface. in
In the hollow interior of the loop-shaped three-dimensional gathers, there is provided a three-dimensional gather for pushing up, which has a fixed end on the base end side of the loop-shaped three-dimensional gathers and a free end portion at the front end, which stands on the wearer's skin side. A free end elastic member is arranged along the longitudinal direction at the free end of the three-dimensional push-up gather, and the free end of the three-dimensional push-up gather pushes the loop-shaped three-dimensional gather from the hollow interior. being pushed up ,
The loop-shaped three-dimensional gathers and the three-dimensional push-up gathers are sheet members in which an elastic member is arranged along the longitudinal direction of the absorbent article at an appropriate position inside the double sheet. a first folded portion extending from the outer side in the width direction of the absorbent article to the inner side in the width direction and folded back toward the wearer's skin at the inner side position in the width direction; While being continuously extended to the width direction outer side, in a state of being folded in three by the second folded portion folded back to the wearer's non-skin side at the width direction outer side position, the non-skin of the wearer Having a first seat portion, a second seat portion and a third seat portion in order from the side ,
A first joining portion that joins the first sheet portion to a member arranged on the non-skin side of the wearer over the entire length in the longitudinal direction; A second joint portion that joins the first sheet portion over the entire length in the direction, and a third joint portion that joins both ends of the third sheet portion in the longitudinal direction to the second sheet portion,
In the longitudinal section between the third joints provided at both ends in the longitudinal direction, at least the third sheet protrudes toward the wearer's skin with the first joint and the second joint as base ends. The lifting three-dimensional gathers form the hollow loop-shaped three-dimensional gathers, and the second sheet portion stands up on the wearer's skin side in the hollow interior of the loop-shaped three-dimensional gathers with the second joint portion as a base end. An absorbent article is provided, characterized in that it forms a

In the invention according to claim 1, the hollow inside of the loop-shaped three-dimensional gather is provided with a three-dimensional gather for pushing up, which is composed of a three-dimensional gather in the form of an upright wall, and the free end of the three-dimensional gather for pushing up makes the loop-shaped three-dimensional gather hollow. pushing up from within. This makes it easier for the loop-shaped three-dimensional gathers to protrude toward the skin, and the tightness of the loop-shaped three-dimensional gathers to the skin surface is improved, thereby preventing leakage of bodily fluids. In addition, since the free end elastic member arranged at the free end of the lifting three-dimensional gather is in contact with the skin surface via the sheet member of the loop-shaped three-dimensional gather, the elastic member is soft against the skin. It becomes a thing, and the discomfort at the time of wearing can be reduced.

The loop-shaped three-dimensional gathers and the three-dimensional push-up gathers are formed by a sheet member in which an elastic member is arranged along the longitudinal direction of the absorbent article at an appropriate position inside the double sheet. a first folded portion extending from the outer side in the width direction of the absorbent article to the inner side in the width direction and folded back toward the wearer's skin at the inner side position in the width direction; While being extended to the outer side in the width direction continuously and folded in three by the second folded portion folded back to the non-skin side of the wearer at the outer side position in the width direction, the wearer's non-skin While having a first sheet portion, a second sheet portion and a third sheet portion in order from the skin side,
A first joining portion that joins the first sheet portion to a member arranged on the non-skin side of the wearer over the entire length in the longitudinal direction; A second joint portion that joins the first sheet portion over the entire length in the direction, and a third joint portion that joins both ends of the third sheet portion in the longitudinal direction to the second sheet portion,
In the longitudinal section between the third joints provided at both ends in the longitudinal direction, at least the third sheet protrudes toward the wearer's skin with the first joint and the second joint as base ends. The lifting three-dimensional gathers form the hollow loop-shaped three-dimensional gathers, and the second sheet portion stands up on the wearer's skin side in the hollow interior of the loop-shaped three-dimensional gathers with the second joint portion as a base end. forming

That is, regarding the folded state and joined state of the sheet members for forming the loop-shaped three-dimensional gathers and the three-dimensional gathers for push-up, the sheet members are folded in three in a predetermined form, and the joints are placed at appropriate positions on each layer. , the loop-shaped three-dimensional gathers and the three-dimensional push-up gathers are formed in the intermediate portion in the longitudinal direction.

As the present invention according to claim 2 , the free end of the three-dimensional push-up gather is a portion where the loop-shaped three-dimensional gather protrudes highest toward the wearer's skin at least in the longitudinal section corresponding to the crotch of the wearer. There is provided an absorbent article according to claim 1 , wherein the absorbent article is located at

In the invention according to claim 2 , the free end portion of the three-dimensional push-up gather is a portion where the loop-shaped three-dimensional gather protrudes highest toward the wearer's skin at least in the longitudinal section corresponding to the crotch of the wearer. , the loop-shaped three-dimensional gathers tend to protrude toward the skin side due to the three-dimensional push-up gathers.

As the present invention according to claim 3 , there is provided an absorbent article according to any one of claims 1 to 4, wherein a plurality of loop elastic members are arranged in the loop portion of the loop-shaped three-dimensional gather along the longitudinal direction. be done.

In the third aspect of the present invention, by arranging a plurality of elastic members for the loop portion in the loop portion of the loop-shaped three-dimensional gather along the longitudinal direction, the loop-shaped three-dimensional gather can easily protrude toward the skin.

As the present invention according to claim 4 , the absorbent according to claim 3 , wherein the elastic member for the loop portion is not arranged on the inner side in the width direction of the absorbent article from the central portion in the width direction of the loop-shaped three-dimensional gathers. A sexual item is provided.

In the invention according to claim 4 , among the loop elastic members arranged in the loop portions of the loop-shaped three-dimensional gathers, the loop portions are arranged on the inner side in the width direction and the outer side in the width direction of the absorbent article. In addition to the force that pulls up the loop-shaped three-dimensional gathers toward the skin, the elastic member also generates a force that widens the hollow loop portion. It works to reduce height. Therefore, in the present invention, the loop-shaped three-dimensional gathers are not arranged on the inner side in the width direction of the absorbent article than the center portion in the width direction so that the protrusion height on the inner side in the width direction of the absorbent article does not decrease. I'm trying

According to a fifth aspect of the present invention, the loop-shaped three-dimensional gather is provided with a section in which the arrangement intervals of the loop section elastic members adjacent along the loop section are relatively narrower than other sections. Item 3. An absorbent article is provided.

In the invention according to claim 5 , the loop-shaped three-dimensional gather is provided with a section in which the arrangement interval of the loop section elastic members adjacent to each other along the loop section is relatively narrower than other sections. In the section where the elastic members for the part are densely arranged, it is easy to protrude to the skin side.

As described in detail above, according to the present invention, the projection height of the loop-shaped three-dimensional gathers is increased, and leakage can be prevented, and discomfort can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially broken development view of the sanitary napkin 1 which concerns on this invention. 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; Fig. 3 is an enlarged cross-sectional view showing a widthwise inner side portion of the gather sheet 7 in a longitudinally intermediate portion; 4 is an enlarged cross-sectional view showing widthwise inner side portions of the gather sheet 7 at both ends in the longitudinal direction. FIG. Fig. 2 is a plan view of the sanitary napkin 1 showing joints; 4 is a perspective view showing a joint portion of a widthwise inner side portion of the gather sheet 7. FIG. It is an enlarged cross-sectional view showing the width direction inner side portion of the gathers sheet 7 in the longitudinal direction intermediate part according to the modification. Fig. 2 is a lateral cross-sectional view of the sanitary napkin 1 showing its upright state (a view taken along the line II-II in Fig. 1). It is an enlarged cross-sectional view showing the width direction inner side portion of the gathers sheet 7 in the longitudinal direction intermediate part according to the modification. Fig. 2 is a lateral cross-sectional view of the sanitary napkin 1 showing its upright state (a view taken along the line II-II in Fig. 1).

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic structure of sanitary napkin 1]
As shown in FIGS. 1 to 3, a sanitary napkin 1 according to the present invention includes a liquid-impermeable back sheet 2 made of a polyethylene sheet or the like, and menstrual blood or vaginal discharge (hereinafter collectively referred to as body fluids). ), an absorbent body 4 made of cotton pulp or synthetic pulp interposed between the two sheets 2 and 3, and longitudinal Within a predetermined section in the longitudinal direction of the napkin ( A pair of left and right three-dimensional gathers BS projecting to the skin side in the section corresponding to the crotch part of the wearer, and gather sheets 7, 7 forming the BS, and around the absorbent body 4, the upper and lower ends thereof At the edges, the outer edges of the liquid-impermeable backsheet 2 and the liquid-permeable topsheet 3 are joined by a joining means such as hot-melt adhesive, heat sealing, or ultrasonic sealing. The liquid-impermeable back sheet 2 extending laterally from the absorber 4 and the gather sheet 7 are joined by a joining means such as hot-melt adhesive, heat sealing, ultrasonic sealing or the like. A pair of left and right wing-shaped flaps W, W extending outward are formed at the side portion of the absorbent body corresponding to the discharging portion H, and the flaps W extend outward from both sides of the rear portion on the rear side (buttock side). A pair of extending left and right rear flaps W _B and W _B are formed. In the illustrated example, the absorbent body 4 is surrounded by an enveloping sheet 5 made of crepe paper or non-woven fabric in order to retain the shape of the absorbent body 4 and improve diffusion. It doesn't have to be. Further, although not shown, a second sheet made of a hydrophilic non-woven fabric or the like having substantially the same shape as the liquid-permeable surface sheet 3 may be arranged adjacent to the non-skin side of the liquid-permeable surface sheet 3 . .

The structure of the sanitary napkin 1 will be further detailed below.
For the liquid-impermeable backsheet 2, a sheet material having at least water impermeability, such as polyethylene, is used. The water-impervious/moisture-permeable sheet material is produced by melting and kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially. A sheet is preferably used. On the non-skin side (outer surface) of the liquid-impermeable back sheet 2, one or more adhesive layers (not shown) are formed along the longitudinal direction of the napkin so that the sanitary napkin 1 can be attached to the body when the sanitary napkin 1 is worn. It is designed to be attached to the underwear. As the liquid-impermeable backsheet 2, a polylaminated nonwoven fabric obtained by laminating a plastic film and a nonwoven fabric may be used.

Next, for the liquid-permeable surface sheet 3, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, as well as 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 method, a spunbond method, a thermal bond method, a meltblown method, a needle punch method, or the like can be used. Among these processing methods, the spunlace method is superior in flexibility and drapeability, and the thermal bond method is superior in bulkiness and compression recovery. When a large number of through-holes are formed in the liquid-permeable surface sheet 3, body fluids are rapidly absorbed, and the dry touch is excellent. 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. Also, in order to facilitate embossing, it is preferable to use olefin fibers such as polyethylene or polypropylene having a relatively low melting point. In addition, 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 liquid-impermeable backsheet 2 and the liquid-permeable topsheet 3 is made of, for example, cotton-like pulp and a water-absorbent polymer. The water-absorbing polymer is mixed in the pulp constituting the absorbent body, for example, as granular powder. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp with a longer fiber length is more functional and functional than hardwood pulp. It is preferably used in terms of price. The basis weight of the absorbent body 4 is preferably 300 to 750 g/m ² , preferably 300 to 400 g/m ² .

Synthetic fibers may also be mixed in the absorber 4 . For the synthetic fibers, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. A mixture may also be used. In addition, 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. In the case of hydrophobic fibers, the synthetic fibers are preferably surface-treated with a hydrophilizing agent so as to have affinity for body fluids.

On the side of the skin contacting surface of the absorbent body 4, a napkin elongated in the longitudinal direction and increased in thickness toward the skin side is provided in a widthwise central portion including a region corresponding to the bodily fluid discharge portion H of the wearer. It is preferable to have a raised portion 6 of the absorbent body. The mid-high portion 6 is provided so as to generally cover the portion from the bodily fluid discharge portion H of the wearer to the starting position of the gluteal groove, and is provided in the longitudinal section from the wing-shaped flap W to the intermediate portion of the rear flap _WB . there is The mid-high portion 6 may be formed by stacking fibers integrally with the absorbent body 4, or may be formed by stacking fibers that are stacked separately. The thickness of the mid-high portion 6 is preferably 3 to 20 mm, preferably 5 to 15 mm, because if it is too thick, the rigidity of the absorbent body 4 increases and the adhesion to the body decreases. When the absorbent body 4 is surrounded by the wrapping sheet 5, the absorbent body 4 and the mid-high portion 6 may be integrally wrapped as shown in FIG. 4 and the mid-high portion 6 may be individually wrapped with the wrapping sheet and then laminated.

On the other hand, in the illustrated example, the width dimension of the liquid-permeable surface sheet 3 is slightly longer than the width dimension of the absorbent body 4, as shown in the cross-sectional views of FIGS. The gathering sheet 7 separates from the liquid-permeable surface sheet 3 on the outer side thereof, specifically, prevents permeation of menstrual blood and vaginal discharge, or enhances the feeling of touch. A gathered sheet 7 made of a non-woven fabric material that has been appropriately water-repellent or hydrophilically treated is arranged according to the purpose of (1).

The gathered sheet 7 may be made of natural fibers, synthetic fibers, regenerated fibers, or the like, and may be formed by an appropriate processing method. Therefore, it is better to use a soft nonwoven fabric with a low basis weight and air permeability. In particular, it is preferable to use a nonwoven fabric that is soft and comfortable to the touch even when it comes into contact with the skin in a state of protruding high toward the skin due to the contractile force of the elastic member. Specifically, it is desirable to use a non-woven fabric produced by the spunbond method with a basis weight of 13 to 23 g/m ² , and in order to reliably prevent permeation of body fluids, silicon-based, paraffin-based, alkylchromic chloride A water-repellent nonwoven fabric coated with a water-repellent agent or the like is preferably used.

As shown in FIGS. 2 and 3, the gather sheet 7 is adhered by hot-melt or the like to the outer portion of the widthwise intermediate portion over the range from a predetermined inner position to the outer edge of the liquid-impermeable backsheet 2 . A predetermined flap portion is formed at a predetermined position by bonding with an adhesive. This flap portion has a pair of left and right wing-shaped flaps W, W on both sides of a portion substantially corresponding to the bodily fluid discharge portion H, and rear flaps W _B , _WB is formed. A longitudinal section including the wing-shaped flaps W corresponds to the crotch portion of the wearer. An adhesive layer (not shown) is provided on each of the outer surface sides (liquid-impermeable back sheet 2 side) of these wing-shaped flaps W, W and rear flaps W _B , W _B . The flaps W, W are folded back to the opposite side at the folding line RL of the base end, wrapped around the crotch portion of the shorts and fastened, and the rear flap _WB is fastened to the inner surface of the shorts. there is

[Three-dimensional gather]
The three-dimensional gather BS consists of one or a plurality of filament-like fibers in which the inner portion of the gather sheet 7 in the width direction is folded almost double, and both ends or appropriate positions in the longitudinal direction are fixed inside the double sheet. The sanitary napkin 1 is formed by disposing elastic stretchable members at predetermined positions along the longitudinal direction of the sanitary napkin 1, folding this double sheet appropriately, and joining predetermined portions at joints. As shown in FIG. 3, the inner side portion of the gather sheet 7 in the width direction includes at least the bodily fluid discharge portion H by adhering to the absorbent body 4 side in an appropriately folded state, as shown in FIG. As shown in FIG. 2, a pair of right and left three-dimensional gathers BS, BS projecting toward the wearer's skin are formed in a predetermined section in the napkin longitudinal direction corresponding to the crotch portion of the wearer.

The three-dimensional gathers BS include hollow loop-shaped three-dimensional gathers 10 protruding toward the wearer's skin on both sides in the longitudinal direction on the side of the skin contacting surface, and hollow inside the loop-shaped three-dimensional gathers 10 along the longitudinal direction. , and has a fixed end on the base end side of the loop-shaped three-dimensional gathers 10, and a three-dimensional push-up gather 11 standing on the wearer's skin side so that the tip forms a free end portion 12. there is A free-end elastic member 13 is arranged along the longitudinal direction at the free end of the three-dimensional push-up gathers 11 . The loop-shaped three-dimensional gathers 10 are pushed up from the hollow interior by the free ends 12 of the three-dimensional push-up gathers 11 .

The loop-shaped three-dimensional gathers 10 are pushed up by the three-dimensional push-up gathers 11, so that the loop-shaped three-dimensional gathers 10 easily protrude toward the skin, and the adhesion of the loop-shaped three-dimensional gathers 10 to the skin surface is improved, and body fluids are absorbed. Leakage can be prevented. In addition, since the free-end elastic member 13 arranged at the free end 12 of the three-dimensional push-up gather 11 is in contact with the skin surface via the sheet member of the loop-shaped three-dimensional gather 10, the skin of the elastic member is reduced. The contact becomes soft, and the discomfort at the time of wearing can be reduced. In this way, in addition to the structure in which the loop-shaped three-dimensional gathers 10 are inherently difficult to fall down, the loop-shaped three-dimensional gathers 10 are pushed up toward the wearer's skin by the push-up three-dimensional gathers 11 and protrude highly toward the skin. Therefore, the loop-shaped three-dimensional gathers 10 can be kept in close contact with the skin surface, and leakage of bodily fluids can be prevented.

As shown in FIG. 4 , the loop-shaped three-dimensional gathers 10 protrude toward the wearer's skin in a hollow loop shape having a substantially circular cross section, with the substantially side edge portion of the absorbent body 4 serving as a base end. A base end portion of the loop-shaped three-dimensional gather 10 is joined to the absorber 4 side by two joint portions spaced apart in the width direction. One or a plurality of loop elastic members 14, three in the illustrated example, are fixed to the loop portion protruding toward the skin from the joint portion of the proximal end portion, with either both ends or an appropriate position in the longitudinal direction being fixed. , 14 . . . are arranged in a stretched state.

As shown in FIG. 4, the three-dimensional push-up gathers 11 are arranged in the hollow interior of the three-dimensional loop gathers 10, and have a fixed end (joint) on the base end side of the three-dimensional loop gathers 10. , an upright wall-shaped three-dimensional gather having a free end 12 at its tip.

The fixed end portion of the three-dimensional push-up gathers 11 can be arranged at any position in the hollow inside of the loop-shaped three-dimensional gathers 10 on the base end side. That is, as shown in the illustrated example, the loop-shaped three-dimensional gather 10 has two joint portions (a first joint portion 25 and a second joint portion 26 to be described later) that are separated in the width direction of the sanitary napkin 1 as base ends. In the form of forming a loop shape, it may have a fixed end portion at or near the joints on the inner side or the outer side in the width direction, or may have a fixed end portion at an intermediate portion between these joints. . Preferably, from the viewpoint of simplifying the manufacturing process and making the upright direction of the three-dimensional push-up gathers 11 face inward, it is preferable to have a fixed end portion at the joint portion (second joint portion 26) on the outside in the width direction. good.

The free end 12 of the lifting three-dimensional gathers 11 abuts against the inner surface of the loop-shaped three-dimensional gathers 10, thereby assisting the loop-shaped three-dimensional gathers 10 to protrude toward the skin from the inside. The cross-sectional shape of the three-dimensional push-up gathers 11 is formed in a substantially linear shape in the illustrated example, but it may be formed in a shape such as a substantially V-shape or a substantially Z-shape, which is bent in one or more at the intermediate portion. good too. In the illustrated example, the free-end elastic member 13 is arranged only at the free end 12 of the three-dimensional push-up gather 11. good too.

The three-dimensional push-up gathers 11 may be formed by a sheet member separate from the loop-shaped three-dimensional gathers 10, but as shown in FIG. It is preferably formed by a member. By forming the sheet member continuously from the loop-shaped three-dimensional gathers 10, the three-dimensional gathers 11 for pushing up can be easily provided in the hollow interior of the loop-shaped three-dimensional gathers 10. - 特許庁

The specific structure of the loop-shaped three-dimensional gathers 10 and the three-dimensional push-up gathers 11 will be described. A sheet member having elastic members (the elastic member 13 for the free end portion and the elastic member 14 for the loop portion, etc.) arranged along the longitudinal direction of the sanitary napkin 1 at an appropriate position inside the double-folded sheet. As shown in FIGS. 4 and 5 , in cross-sectional views of the sanitary napkin 1 in the width direction, it extends from the outer side in the width direction of the sanitary napkin 1 to the inner side in the width direction and the inner side in the width direction. A first folded portion 20 folded back toward the wearer's skin side at the lateral position, and a first folded portion 20 extending outward in the width direction continuously from the first folded portion 20 and positioned at the outer side position in the width direction of the wearer. A first sheet portion 22, a second sheet portion 23 and a third sheet portion 24 are formed in order from the wearer's non-skin side in a state of being folded in three by the second folded portion 21 folded back to the non-skin side of the ing.

As shown in FIGS. 6 and 7, at a position where the first sheet portion 22 is slightly outward in the width direction from the first folded portion 20, the entire length in the longitudinal direction is covered by the wearer's comfort. The first joint portion 25 joined to the member (liquid-permeable surface sheet 3) arranged on the skin side, and the second sheet portion 23 are joined at a position near the second folded portion 21 over the entire length in the longitudinal direction. A second joint portion 26 that joins the first sheet portion 22 and a third joint portion 27 that joins both ends of the third sheet portion 24 in the longitudinal direction to the second sheet portion 23 are provided. In addition, in the present embodiment, fourth joints 28 are provided for joining both ends in the longitudinal direction of the first sheet portion 22 to the liquid-permeable surface sheet 3 at positions near the first folded portions 20 . . The boundary between the fourth joint portion 28 and the first joint portion 25 does not necessarily have to be clear, and may be connected in the width direction. In this case, from the section in which only the first joint 25 exists in the middle portion in the longitudinal direction, the first joint 25 and the fourth joint are bounded by extension lines extending the side edges of the first joint 25 to both ends in the longitudinal direction. 28 can be distinguished. In addition, FIG. 6(A) is a plan view showing a joint portion (the first joint portion 25 and the fourth joint portion 28) between the first sheet portion 22 and the liquid-permeable surface sheet 3, and FIG. A plan view showing a joint portion (the second joint portion 26) between the second sheet portion 23 and the first sheet portion 22, and FIG. It is a top view which shows said 3rd joint part 27).

At least the third sheet portion 24 is worn with the first joint portion 25 and the second joint portion 26 as proximal ends in the longitudinal section between the third joint portions 27, 27 provided at both ends in the longitudinal direction. The hollow loop-shaped three-dimensional gathers 10 projecting toward the wearer's skin are formed, and the second sheet portion 23 extends toward the wearer's skin in the hollow interior of the loop-shaped three-dimensional gathers 10 with the second joint portion 26 as the base end. A three-dimensional gather 11 for pushing up is formed. That is, the loop-shaped three-dimensional gathers 10 protrude toward the skin side so as to form a hollow loop shape with two first joint portions 25 and second joint portions 26 separated in the width direction as base ends. The lifting three-dimensional gathers 10 stand up on the skin side with a second joint portion 26 forming a base end on one side (outer side in the width direction) of the loop-shaped three-dimensional gathers 10 as a base end.

With the above structure, the loop-shaped three-dimensional gathers 10 and the three-dimensional push-up gathers 11 can be continuously formed with one gather sheet 7 . In addition, the three-dimensional gathers according to the present embodiment are second sheet portions that extend inward in the width direction from the second joint portion 26 in which the three-dimensional push-up gathers 11 are provided on the outer side in the width direction as a base end. 23, the free end 12 faces inward in the width direction with the three-dimensional push-up gathers 11 standing on the skin side. Due to the resistance of the internal push-up solid gathers 11, the loop-shaped solid gathers 10 are unlikely to fall outward in the width direction.

In the embodiments shown in FIGS. 5, 6C, and 7, the third joint portion 27 joins the third sheet portion 24 and the second sheet portion 23 over substantially the entire width. As long as it is provided at least near the first folded portion 20 overlapping the free end elastic member 13, it may not be provided on the second folded portion 21 side.

As shown in FIG. 2, the free end portion 12 of the three-dimensional push-up gather 11 in the natural state where the contractile force of the elastic members 13 and 14 acts is at least in the longitudinal section corresponding to the crotch of the wearer. It is preferable that the loop-shaped three-dimensional gathers 10 are positioned at the portion that protrudes most toward the wearer's skin. In the longitudinal section corresponding to the crotch portion of the wearer, the sanitary napkin 1 undergoes the greatest bending deformation in the longitudinal direction, and the three-dimensional gathers BS are pulled up to the skin side by the contractile force of the elastic members arranged along the longitudinal direction. It is the part that can be Here, since the free end portion 12 of the lifting three-dimensional gathers 11 is arranged so as to be able to freely change its position in the hollow interior of the loop-shaped three-dimensional gathers 10, Among them, it is easy to move to the part that protrudes most toward the wearer's skin side, and the protruding of the loop-shaped three-dimensional gathers 10 to the skin side is pushed up from the inside by the three-dimensional push-up gathers 11. The loop-shaped three-dimensional gathers 10 protrude further toward the skin, and can be kept in close contact with the wearer's skin. This promotes the effect of preventing leakage of bodily fluids.

From the viewpoint of exhibiting such an effect more remarkably, the elongation rate of the free end elastic member 13 arranged at the free end 12 of the three-dimensional push-up gather 11 is arranged at the loop portion of the loop-shaped three-dimensional gather 10. The elongation rate of the elastic member 14 for the loop portion may be larger than that of the elastic member 14 for the loop portion. As a result, the effect of pushing up the loop-shaped three-dimensional gathers 10 by the three-dimensional push-up gathers 11 can be further enhanced, so that the loop-shaped three-dimensional gathers 10 protrude further toward the skin. In addition, since the loop elastic members 14 arranged in the loop-shaped three-dimensional gathers 10 are in direct contact with the skin surface, if the elongation rate is increased, the contact with the skin surface is deteriorated and the feeling of wearing is reduced. The free-end elastic member 13 arranged at the free end 12 of the three-dimensional gathers 11 is in contact with the skin surface via the loop-shaped three-dimensional gathers 10. Therefore, even if the elongation rate is increased, the feeling of wearing is greatly reduced. I have nothing to do. The elongation rate of the free end elastic member 13 is preferably 1 to 3 times, preferably 1.2 to 2 times, the elongation rate of the loop elastic member 14 .

FIG. 8 is a cross-sectional view showing the folded state of the inner side portion in the width direction of the gathered sheet 7 according to the modification, and FIG. 9 is a cross-sectional view of the sanitary napkin 1 showing the upright state. In this modification, the loop elastic members 14 arranged in the loop portions of the loop-shaped three-dimensional gathers 10 are not arranged on the inner side in the width direction of the sanitary napkin 1 among the loop portions of the loop-shaped three-dimensional gathers 10. I'm trying Of the loop elastic members 14 arranged in the loop portions of the loop three-dimensional gathers 10, the loop elastic members 14 other than the loop elastic members 14 arranged in the width direction central portion of the loop three-dimensional gathers 10, That is, the elastic members 14 for the loop portion, which are respectively arranged on the inner side in the width direction and the outer side in the width direction of the sanitary napkin 1, expand the hollow loop portion together with the force to pull up the loop-shaped three-dimensional gathers 10 to the skin side. Since a directional force also acts, the component of the force in the direction of widening the hollow loop portion functions to reduce the protrusion height of the loop-shaped three-dimensional gathers 10 toward the skin side. Therefore, as described above, by not arranging the loop elastic member 14 on the inner side in the width direction of the sanitary napkin 1 among the loop portions of the three-dimensional loop gather 10, the loops on the inner side in the width direction The protruded height of the three-dimensional gathers 10 is prevented from being lowered.

On the other hand, as another modification, as shown in FIGS. 10 and 11, in the loop-shaped three-dimensional gathers 10, the arrangement intervals of the loop elastic members 14 adjacent along the loop are set relative to the other sections. A narrowed interval may be provided in the . By providing a section in which the arrangement interval of the loop elastic member 14 is narrowed, this section can easily protrude toward the skin, and the effect of preventing body fluid leakage can be further improved. The section in which the arrangement interval of the loop section elastic member 14 is narrowed may be provided in any one section along the loop of the loop section, and as shown in the illustrated example, it is located on the inner side in the width direction of the sanitary napkin 1. It is preferable to provide As a result, a wall surface that stands substantially vertically toward the skin is formed on the inner side in the width direction of the loop-shaped three-dimensional gathers 10, and the body fluid flowing toward the outer side in the width direction is formed into the loop-shaped three-dimensional gathers. At 10, it can be reliably blocked.

DESCRIPTION OF SYMBOLS 1... Sanitary napkin, 2... Liquid-impermeable back sheet, 3... Liquid-permeable top sheet, 4... Absorbent body, 5... Enveloping sheet, 6... Mid-high part, 7... Gather sheet, 10... Loop-shaped three-dimensional gather , 11... Solid gathers for pushing up 12... Free end 13... Elastic member for free end 14... Elastic member for loop part 20... First folded part 21... Second folded part 22... First Sheet part 23... Second sheet part 24... Third sheet part 25... First adhesion part 26... Second adhesion part 27... Third adhesion part 28... Fourth adhesion part

Claims (5)

An absorbent article in which hollow loop-shaped three-dimensional gathers protruding toward the wearer's skin are formed on both sides in the longitudinal direction of the skin-contacting surface,
In the hollow interior of the loop-shaped three-dimensional gathers, there is provided a three-dimensional gather for pushing up, which has a fixed end on the base end side of the loop-shaped three-dimensional gathers and a free end portion at the front end, which stands on the wearer's skin side. A free end elastic member is arranged along the longitudinal direction at the free end of the three-dimensional push-up gather, and the free end of the three-dimensional push-up gather pushes the loop-shaped three-dimensional gather from the hollow interior. being pushed up ,
The loop-shaped three-dimensional gathers and the three-dimensional push-up gathers are sheet members in which an elastic member is arranged along the longitudinal direction of the absorbent article at an appropriate position inside the double sheet. a first folded portion extending from the outer side in the width direction of the absorbent article to the inner side in the width direction and folded back toward the wearer's skin at the inner side position in the width direction; While being continuously extended to the width direction outer side, in a state of being folded in three by the second folded portion folded back to the wearer's non-skin side at the width direction outer side position, the non-skin of the wearer Having a first seat portion, a second seat portion and a third seat portion in order from the side ,
A first joining portion that joins the first sheet portion to a member arranged on the non-skin side of the wearer over the entire length in the longitudinal direction; A second joint portion that joins the first sheet portion over the entire length in the direction, and a third joint portion that joins both ends of the third sheet portion in the longitudinal direction to the second sheet portion,
In the longitudinal section between the third joints provided at both ends in the longitudinal direction, at least the third sheet protrudes toward the wearer's skin with the first joint and the second joint as base ends. The lifting three-dimensional gathers form the hollow loop-shaped three-dimensional gathers, and the second sheet portion stands up on the wearer's skin side in the hollow interior of the loop-shaped three-dimensional gathers with the second joint portion as a base end. An absorbent article characterized by forming 2. A free end portion of the three-dimensional push-up gather is positioned at a portion of the loop-shaped three-dimensional gather that most protrudes toward the wearer's skin at least in a longitudinal section corresponding to the crotch of the wearer. absorbent article. 3. The absorbent article according to any one of claims 1 and 2, wherein a plurality of loop elastic members are arranged in the loop portion of the loop-shaped three-dimensional gather along the longitudinal direction. 4. The absorbent article according to claim 3 , wherein said elastic member for loop section is not arranged on the inner side in the width direction of said absorbent article from the central portion in the width direction of said loop-shaped three-dimensional gathers. 4. The absorbent article according to claim 3 , wherein the loop-shaped three-dimensional gathers are provided with a section in which the arrangement intervals of the loop section elastic members adjacent to each other along the loop section are relatively narrower than other sections.

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