JP2018051110A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distribute wrinkles generated at a rearward of an absorbent article when a user wears it and prevent leakage of body fluids by improving fittability to a buttock-part groove.SOLUTION: The absorbent article includes: a pair of left/right longitudinal compressed grooves 12 extending in the longitudinal direction of the absorbent article, formed at the rearward thereof; and multiple pairs of left/right inclined compressed grooves 14, 14,... inclined forward toward the outside in the width direction, formed at intervals apart in the longitudinal direction of the absorbent article, and spaced from the rearward of the longitudinal compressed grooves 12. The longitudinal compressed grooves 12 and the inclined compressed grooves 14 are respectively separated to the left and right at the width-direction central part of the absorbent article.SELECTED DRAWING: Figure 4

Description

  The present invention is an absorbent article mainly used for sanitary napkins, vaginal seats, incontinence pads, toiletries, etc., and more specifically, a plurality of slopes that disperse wrinkles generated behind the absorbent article when worn. It is related with the absorbent article which made it easy to deform | transform the rear part of an absorbent article along a body by providing a shape pressing groove.

  Conventionally, as shown in FIG. 5, as an absorbent article 50 such as a panty liner, a sanitary napkin, an incontinence pad, a liquid-impermeable back sheet 51 such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a nonwoven fabric or a liquid-permeable material. An absorbent body 53 made of cotton-like pulp or the like is interposed between the liquid-permeable surface sheet 52 such as a permeable plastic sheet, and the liquid-impervious surface sheet 52 is pressed against the liquid-permeable surface sheet 52 from the outer surface side. What formed the pressing groove 54 dented in the back surface sheet 51 side is known.

  The compressed groove 54 is generally formed so as to surround the middle and high portions of the absorbent body thickened on the skin side disposed in the region from the blood drainage port portion to the buttocks groove, In the rear, the pressing groove 54 is formed so that line segments extending in the left and right longitudinal directions are connected to each other at the center in the width direction of the absorbent article.

  When the absorbent article 50 is attached to the underwear, as shown in FIG. 5, the absorbent article 50 is fixed to the inner surface of the crotch portion of the underwear, and the wing-shaped flaps 55, 55 protruding on both sides are wound around the crotch portion of the underwear. Folded to the outer surface side. In this wearing state, the inner part of the base of the leg receives pressure (leg pressure) inward from both sides in the width direction, or the longitudinal direction of the absorbent article 50 along the longitudinal direction of the body. By changing the end portion into a curved shape projecting to the skin side, the portion where the line segments extending in the left and right longitudinal directions are connected to each other at the center portion in the width direction of the rear end of the compressed groove 54 is used as a base point. Folding creases 56 associated with the bending of the absorbent body are likely to be concentrated in one place over almost the entire length in the width direction. Since this folded crease 56 is formed such that the surface of the absorbent article 50 (liquid-permeable surface sheet 52) is recessed toward the non-skin side so as to be separated from the skin surface, in this folded crease 56, the absorbent article 50 There was a gap between the surface and the skin surface, and it was easy for body fluid to leak through this gap.

  Numerous improvements have been made to this type of absorbent article to prevent leakage of bodily fluids and to make it easier to deform the absorbent article along the shape of the body when worn. There exists a technique for forming the compressed groove recessed toward the side in various forms (for example, Patent Documents 1 and 2 below).

  In the following Patent Document 1, a pair of squeezing grooves are formed on the surface sheet side in the rear part, and one squeezing groove and the other squeezing groove constituting the squeezing groove pair are symmetrical with respect to the longitudinal center line. Formed and spaced apart from each other in the lateral direction, the compressed grooves have a convex shape that curves convexly rearward in the longitudinal direction in plan view, and a curved portion and an inner line segment that form the top of the convex An inner line segment, the inner line segment and the outer line segment extending along a tangent line at the end of the curved portion to which the inner line segment and the outer line segment are connected. The distance between one outer line segment and the other outer line segment gradually increases toward the front, and the vertical length on the outer line segment side is Absorbent articles that are longer than the longitudinal length on the inner line segment side are disclosed .

  Further, in Patent Document 2 below, a rear compression groove is provided in the rear portion in the longitudinal direction, and the rear compression groove has a pair of lateral compression groove portions that extend in the width direction of the absorbent article and are separated from each other. An absorptive article is disclosed in which the lateral compression groove portion is formed substantially symmetrically about a longitudinal center line as an axis of symmetry.

JP, 2015-167773, A JP 2009-77927 A

  However, in the absorbent article described in Patent Document 1, since each of the compressed groove pairs has a convex shape that curves convexly toward the rear, the top of the convex is used as a base point when the absorbent article is mounted. Folding creases along the width direction are likely to occur in one place. In addition, the absorbent article described in Patent Document 2 has a pair of lateral compression groove portions extending in the width direction. However, folding wrinkles along the width direction concentrated in one place with the pair of lateral compression groove portions as base points. Is likely to occur.

  As described above, when wrinkles due to external force and deformation at the time of wearing the absorbent article are concentrated in one place, the wrinkle depth of the wrinkle becomes deeper and the width of the wrinkle becomes larger. Adhesion with the skin surface of the wrinkle part was remarkably lowered, which caused the leakage of body fluid.

  Then, the main subject of this invention is providing the absorbent article which improved the fitting property with respect to a buttocks groove | channel, and prevented the leak of a bodily fluid while dispersing the wrinkle which generate | occur | produces behind an absorbent article at the time of mounting | wearing.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorbent body is interposed between a liquid-permeable top sheet and a liquid-impervious back sheet,
A pair of left and right longitudinal squeezing grooves extending in the longitudinal direction of the absorbent article are formed at the rear of the absorbent article, and spaced apart to the rear side of the longitudinal squeezing groove and inclined forward in the width direction outside. The left and right pair of inclined squeezing grooves are formed with a plurality in the longitudinal direction of the absorbent article,
The longitudinal squeezing groove and the inclined squeezing groove are respectively separated from the left and right at the center in the width direction of the absorbent article.

  In the first aspect of the present invention, since the longitudinal squeezing groove and the inclined squeezing groove are spaced apart from each other at the center in the width direction of the absorbent article, the portion connected at the center in the width direction is the base point. No bent creases are formed. In addition, since the pressing groove is not formed in the left and right parts at the center in the width direction, it is easy to deform so that this part enters the buttocks groove when the absorbent article is mounted, and the fit to the buttocks groove is improved it can.

  Further, in the present absorbent article, a pair of left and right inclined compressed grooves that are separated to the rear side of the longitudinal compression groove and incline forward toward the outer side in the width direction are spaced apart in the longitudinal direction of the absorbent article. Since a plurality of creases are formed, the creases are formed in a dispersed manner in the rear of the absorbent article without being concentrated in one place. Specifically, since a plurality of left and right paired inclined compressed grooves are formed at intervals in the longitudinal direction of the absorbent article, a plurality of small folded creases are formed along these inclined compressed grooves. Will come to be. Dispersion and wrinkles of the absorbent article are formed in a dispersed manner by dispersing the distortion caused by external forces such as deformation and leg pressure when the absorbent article is mounted in one place, but not in one place. The depth and width of each folded crease is smaller than that of the creased crease formed so that the adhesion with the skin surface is prevented from being lowered, and the leakage of body fluid can be prevented.

  Further, when the absorbent article is mounted, the wing-shaped flap is folded back to the outer surface side so that the crotch portion of the underwear is wound, so that a tensile force toward the wing-shaped flap acts on the outer edge in the width direction of the absorbent article. The tensile force toward the wing-shaped flap acts on the outer edge in the width direction of the absorbent article due to the leg pressure directed from the outside in the width direction centering on the part where the wing-shaped flap is formed. The folded creases formed along the width direction of the absorbent article are formed so as to incline forward toward the outer side in the width direction (see FIG. 5). Therefore, by providing the inclined squeezing grooves along the direction in which the folded wrinkles are easily formed, the folded wrinkles generated at the time of mounting are further dispersed and formed.

  As the present invention according to claim 2, there is provided the absorbent article according to claim 1, wherein the inclined compressed grooves are arranged at intervals of 5 to 20 mm with respect to the longitudinal direction of the absorbent article.

  In the second aspect of the invention, the inclined compressed grooves are arranged at predetermined intervals with respect to the longitudinal direction of the absorbent article in order to enhance the dispersion effect of the folded wrinkles generated at the time of mounting by the inclined compressed grooves. .

  The present invention according to claim 3 is the absorbent article according to any one of claims 1 and 2, wherein the inclined angle of the inclined compressed groove is 30 to 80 ° with the longitudinal line of the absorbent article. Is provided.

  In the third aspect of the invention, as described above, the crease generated at the rear of the absorbent article due to the tensile force when the wing-shaped flap is folded is formed to be inclined forward in the width direction. The inclined squeezing groove is formed at a predetermined inclination angle along the folded crease.

  As this invention which concerns on Claim 4, the edge of the longitudinal direction front side of the said inclined pressing groove is on the front side of the longitudinal direction of an absorbent article from the edge of the longitudinal direction rear side of the inclined pressing groove adjacent to the front side. The absorbent article in any one of Claims 1-3 located is provided.

  In the invention according to claim 4, the end of the inclined compressed groove in the longitudinal direction is positioned on the front side in the longitudinal direction of the absorbent article from the end in the longitudinal direction of the inclined compressed groove adjacent to the front side. Accordingly, a low-rigidity portion where no compressed groove is formed in the width direction of the absorbent article is not formed, and rigidity is increased by the inclined compressed groove, so that wrinkles associated with mounting are surely provided with a plurality of inclined compressed grooves. Are distributed along the surface.

  As this invention which concerns on Claim 5, the edge of the longitudinal direction back side of the said inclined pressing groove is a position with respect to the width direction of an absorbent article compared with the edge of the longitudinal direction rear side of the said longitudinal direction pressing groove. The absorbent article according to any one of claims 1 to 4 is provided.

  In the invention according to claim 5, the edge of the inclined compressed groove in the longitudinal direction is equal in position to the width direction of the absorbent article compared to the edge of the longitudinal compressed groove in the longitudinal direction. By making it outside, it is easier to form a folded wrinkle with the rear end edge of the inclined compressed groove as a starting point than a bent wrinkle with the rear end edge of the longitudinal pressing groove as a starting point. On the contrary, when the end edge on the rear side in the longitudinal direction of the longitudinal squeezing groove is located on the outer side in the width direction of the absorbent article with respect to the end edge on the rear side in the longitudinal direction of the inclined squeezing groove, this width Folding creases centering on the rear edge of the longitudinal squeezing groove located on the outer side in the direction are easily formed in a concentrated manner.

As the present invention according to claim 6, the rear side portion of the longitudinal compression groove is formed to be gradually inclined inward in the width direction as going to the rear side,
The absorbent article in any one of Claims 1-5 in which the inclination angle of the said inclined pressing groove is formed larger than the inclination angle of the rear side edge of the said longitudinal direction pressing groove.

  In the invention described in claim 6, the inclination angle of the inclined pressing groove is formed larger than the inclination angle of the rear side edge of the longitudinal pressing groove. Thereby, the direction of the inclined compressed groove with a larger inclination angle is closer to the compressed groove, the point of action of the folding force (intersection at the center in the width direction of the extension line of the rear end of the compressed groove formed by the left and right pairs) Folding wrinkles are easily formed.

  As described above in detail, according to the present invention, wrinkles generated behind the absorbent article at the time of wearing can be dispersed, the fitting property to the buttocks groove can be improved, and the leakage of body fluid can be prevented.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. It is an enlarged plan view of the pressing groove formed behind the sanitary napkin 1. It is a perspective view which shows the conventional absorbent article 50. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic structure of sanitary napkin 1]
The sanitary napkin 1 according to the present invention, as shown in FIGS. 1 to 3, is a liquid-impervious back sheet 2 made of a polyethylene sheet or the like, and menstrual blood, or urine (hereinafter collectively referred to as body fluid). ) And the absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2 and 3 and both sides of the skin contact surface side. A side non-woven fabric 7 provided over the entire length along the direction, and in the periphery of the absorbent body 4, the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 at the upper and lower edges. The liquid-impervious back surface whose outer edge portion is joined by a bonding means such as an adhesive such as hot melt, a heat seal, an ultrasonic seal or the like, and that both side edge portions extend laterally from the absorbent body 4. Sheet 2 and side nonwoven fabric 7 Adhesive or heat sealing, such as Ttomeruto, by being bonded by bonding means such as ultrasonic sealing, in which the flap portion where the absorber is not interposed is formed. In the illustrated example, the absorbent body 4 is surrounded by a wrapping sheet 5 made of crepe paper or nonwoven fabric in order to maintain the shape of the absorbent body 4 and improve the diffusibility. It does not have to be provided. Although not shown, a second sheet made of a hydrophilic non-woven fabric having substantially the same shape as the liquid-permeable surface sheet 3 may be disposed adjacent to the non-skin side of the liquid-permeable surface sheet 3. .

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
The liquid-impervious back sheet 2 is made of a sheet material having at least water shielding properties such as polyethylene, but it is desirable to use a material having moisture permeability from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used. One or more adhesive layers (not shown) are formed on the non-skin side surface (outer surface) of the liquid-impermeable back sheet 2 along the longitudinal direction of the napkin, and the sanitary napkin 1 is attached to the body when worn on the body. It is designed to be fixed to underwear. As said liquid-impermeable back sheet 2, you may use the polylamination nonwoven fabric which laminated | stacked the plastic film and the nonwoven fabric.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of bulkiness and high compression recovery. When a large number of through-holes are formed in the liquid-permeable surface sheet 3, body fluid is quickly absorbed, and the dry touch property is excellent. 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. In order to facilitate the embossing treatment, it is preferable to use an olefin fiber such as polyethylene or polypropylene having a relatively low melting point. Moreover, a core-sheath fiber, a side-by-side fiber, or a split fiber composite fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be suitably used.

The absorbent body 4 interposed between the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is composed of, for example, cotton-like pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of price. The basis weight of the absorber 4 is 250 to 650 g / m ² , preferably 300 to 400 g / m ² .

  The absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, 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. It may be a mixture. In addition, 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 also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  On the skin side of the absorbent body 4, it is preferable to form a middle-high part 6 of the absorbent body thickened on the skin side. The absorbent body 4 and the middle / high portion 6 may be separately manufactured and then stacked in an assembly process, or may be integrally formed by three-dimensionally stacking the absorbent body. Moreover, it is good also as a two-stage fiber structure which accumulates the middle-high part 6 on the upper stage of the absorber 4. FIG. The middle and high portions 6 will be described in detail later.

In the illustrated example, the width dimension of the liquid-permeable surface sheet 3 is slightly longer than the width of the absorbent body 4 so as to cover the absorbent body 4 as shown in the cross-sectional views of FIGS. 2 and 3. For the purpose of preventing the penetration of the side nonwoven fabric 7 different from the liquid-permeable surface sheet 3, specifically menstrual blood or the like, or enhancing the touch feeling Accordingly, a side nonwoven fabric 7 constituted by using a nonwoven fabric material subjected to appropriate water repellent treatment or hydrophilic treatment is disposed. The side nonwoven fabric 7 can be made of natural fiber, synthetic fiber, regenerated fiber, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 13 to 23 g / m ² , and silicon-based, paraffin-based, alkylchromic chloride-based water repellents, etc. in order to reliably prevent permeation of body fluids. A water repellent nonwoven fabric coated with is preferably used.

As shown in FIGS. 2 and 3, the side nonwoven fabric 7 is bonded by hot melt or the like over the range from the predetermined inner position to the outer edge of the liquid-impermeable back sheet 2 from the width direction intermediate portion. The flap part which the absorber 4 does not interpose on the both sides of the absorber 4 by the laminated sheet part of these side nonwoven fabrics 7 and the liquid-impermeable back sheet 2 is formed. The flap portion forms a pair of left and right wing-shaped flaps W, W at the absorber side portion position substantially corresponding to the body fluid discharge portion H, and the hip hold flaps W _B , W at the hip side (rear side) position from this. _B may be formed. These wing-shaped flaps W, W and hip hold flaps W _B, respectively pressure-sensitive adhesive layer on the outer surface side of the W _B (not shown) is provided, proximal to the time of mounting with respect to shorts, the wing-shaped flaps W, and W folded on the opposite side at the folding line RL position of parts, as well as fastened is wound around the crotch portion of the panties, so as to fasten the hip hold flaps W _B to the inner surface of the shorts.

  On the other hand, the inner side portion of the side nonwoven fabric 7 is folded substantially double, and one or a plurality of both ends or appropriate positions in the longitudinal direction are fixed to the middle portion in the height direction inside the double sheet. In the illustrated example, the three elastic elastic members 9, 9... Are arranged in a state where both ends or appropriate positions in the longitudinal direction are fixed. As shown in FIG. 3, the double sheet portion is bonded to the absorber 4 side in a state of being folded once outward and laminated, as shown in FIG. Straight three-dimensional gathers BS and BS standing on the surface side while inclining are formed in a pair of left and right.

[Middle and high section]
In this sanitary napkin 1, as shown in FIGS. 1 and 2, the middle height 6 of the absorbent body that is thickened on the skin side is at least in the range from the body fluid discharge part H to the rupture part of the absorbent body 4. It is preferable to provide it. The middle-high portion 6 is adjacent to the skin side surface of the absorbent body 4 and is disposed at the center in the width direction of the absorbent body 4, and is formed with a width dimension and a longitudinal dimension smaller than the absorbent body 4. If the thickness of the middle-high part 6 is too thick, the rigidity increases and the adhesion to the body decreases, and if it is too thin, the adhesion to the body fluid discharge part H decreases, so that it is 3 to 25 mm, preferably 5 to 18 mm. It is good. In addition, the total basis weight of the middle and high parts 6 and the absorber 4 where the middle and high parts 6 are arranged is preferably 400 to 900 g / m ² , particularly 600 to 800 g / m ² .

  The middle-high portion 6 is provided only in a region including the body fluid discharge portion H of the wearer, or provided in each of a region including the drainage discharge portion H and a region including the buttocks groove, or a region from the body fluid discharge portion H to the buttocks groove. Can be provided continuously. For example, as shown in FIG. 1, a middle / high front part 6 </ b> A provided in a region including the wearer's body fluid discharge part H, and a middle / high rear part 6 </ b> B provided in a region including the wearer's buttocks groove The middle-high front portion 6A and the middle-high rear portion 6B are provided in a region connecting the napkin in the front-rear direction, and can be configured by a middle-high neck portion 6C in which both side edges are bound inward.

  The middle-high front portion 6A is formed in a region including the body fluid discharge portion H of the wearer, specifically, a region slightly longer on the front side and the rear side than the body fluid discharge portion H. The middle-high front portion 6A is formed in a vertically long shape in the front / rear direction of the napkin, and both side edges are formed by straight lines extending in the front / rear direction of the napkin. The front edge is formed by an arcuate curve that bulges toward the front of the napkin.

  The middle-high rear portion 6B is formed in a region including the wearer's buttocks groove. Specifically, it is provided in the region from the position where the buttocks groove starts on the crotch side of the wearer to the rear, the position beyond the buttocks groove, the end position of the buttocks groove or the intermediate position of the buttocks groove.

  The middle-high rear portion 6B is preferably formed in a tapered shape with a rear portion gradually narrowing toward the rear of the napkin. As a result, the middle / high rear portion 6B can easily enter the depth of the buttocks groove, and the leakage of body fluid that travels through the buttocks groove can be prevented. In the illustrated example, this tapered shape starts from the front end of the middle / high rear portion 6B (boundary with the middle / high constricted portion 6C). After forming with the straight line extended in a direction, you may make it a taper shape start from there.

  The middle / high neck portion 6C is provided in a region connecting the middle / high front portion 6A and the middle / high rear portion 6B in the front-rear direction of the napkin. The rear end of 6C is continuous with the front end of the middle / high rear portion 6B. The middle and high neck portions 6C are preferably formed in a curved shape in which the outlines on both sides bulge inward in the width direction. Thereby, it becomes easy to fit also to the fine unevenness | corrugation formed in the skin surface from a wearer's bodily fluid discharge part H to the starting position of a buttock groove | channel, and adhesiveness with a skin surface can be improved.

  The middle-high portion 6 includes at least pulp fibers and synthetic fibers, and the ratio of the pulp fibers: synthetic fibers is 80 to 20:20 to 80, preferably 40 to 60:60 to 40 in terms of weight. Is desirable. Moreover, the said middle-high part 6 can contain a water absorbing polymer. Examples of the water-absorbing polymer include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, polysulfone Examples include cross-linked acid salts, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. The water-absorbing polymer having the water-absorbing performance can be adjusted in water-absorbing power and water-absorbing speed by adjusting the crosslinking density and the crosslinking density gradient in the production process. Since the so-called gel blocking phenomenon occurs when the blending amount is increased because the middle and high portions 6 need to promote the penetration to the absorbent body 4 side, the blending amount is 1 to 10 in terms of weight with respect to the total weight of the pulp fiber and the synthetic fiber. It is desirable to blend in the ratio of%. In addition, when the water-absorbing polymer content exceeds 50%, the entanglement between the pulp fibers is lost, the sheet strength is lowered, and tearing or cracking is likely to occur.

(Pressing groove)
In the sanitary napkin 1, the skin contact surface side (the outer surface side of the liquid-permeable surface sheet 3) is directed from the skin contact surface side (the outer surface side of the liquid-permeable surface sheet 3) toward the non-skin side (the liquid-impermeable back sheet 2 side). A depressed groove 10 is formed. The said compressed groove 10 is formed in the both sides from the area | region containing the site | part corresponding to a buttock groove | channel from the area | region containing the site | part corresponding to the bodily fluid discharge part H at least, respectively. The region including the part corresponding to the body fluid discharge part H is a center region in the width direction including all parts where the wearer's body fluid discharge part H abuts when the sanitary napkin 1 is worn, and the range in the napkin longitudinal direction is In the case where the wing-shaped flaps W are provided on both sides, this generally corresponds to the longitudinal range of the wing-shaped flaps W. Further, the region including the portion corresponding to the buttocks groove is a center region in the width direction including at least a part of the wearer's buttocks groove when the sanitary napkin 1 is worn, and rearward from the start position of the crotch-side buttocks groove It is the range to the middle position of the buttock groove.

  In the sanitary napkin 1 shown in FIG. 1, the compressed grooves 10 are substantially longitudinal on the both sides of a region including a region corresponding to the body fluid discharge part H to a region including a region corresponding to the buttocks groove. A pair of left and right front longitudinal squeezing grooves 11, 11 formed continuously along the direction, and spaced apart from the rear side of the front longitudinal squeezing groove 11, and on both sides of the portion corresponding to the buttock groove The left and right pairs of rear longitudinal pressing grooves 12, 12 formed continuously along substantially the longitudinal direction of the napkin 1 and the front side of the front longitudinal pressing grooves 11, 11 are spaced apart from each other. A crescent-shaped front end crescent-shaped groove 13 that crosses the longitudinal center line of the napkin 1 in the width direction and is formed substantially along the width direction of the napkin 1, and the rear longitudinal-direction compressed groove 12, 12 A pair of left and right inclined squeezing grooves 14, 14... Are formed apart from each other on the rear side and inclined to the front side toward the outer side in the width direction and spaced apart in the napkin longitudinal direction. ing. In the example of illustration, although the said front side longitudinal direction pressing groove 11 and the back side longitudinal direction pressing groove 12 are spaced apart and arranged in the longitudinal direction, the said front side longitudinal direction pressing groove 11 and the back side longitudinal direction pressing groove 12 are arranged. It is good also as a longitudinal direction pressing groove which continues from the area | region containing the site | part corresponding to the bodily fluid discharge part H to the site | part corresponding to a buttock groove | channel.

  As shown in FIG. 1, the front longitudinal compression groove 11 is disposed at least on both sides of the middle-high front portion 6A and the middle-high constricted portion 6C, and the rear end portion is slightly over the middle-high rear portion 6B. It is extended.

  Moreover, the said rear side longitudinal direction pressing groove 12 is each arrange | positioned by the right-and-left pair on both sides of the said middle-high back part 6B, as FIG. 1 shows. The said rear side longitudinal direction pressing groove 12 is arrange | positioned in the range shorter than the napkin longitudinal direction length of the middle-high rear part 6B. In other words, the front end of the middle / high rear portion 6B is located on the front side from the front end of the rear longitudinal compression groove 12, and the rear end of the middle / high rear portion 6B is located on the rear side from the rear end of the rear longitudinal compression groove 12. .

  As shown in detail in FIG. 4, the rear longitudinal squeezing groove 12 has a separating portion 15 whose rear end is separated left and right. Further, the rear end of the middle-high portion 6 is located rearward in the napkin longitudinal direction from the rear end of the rear longitudinal compression groove 12. That is, it arrange | positions so that the rear-end part of the middle-high part 6 may protrude back from the separation | spacing part 15 of the rear end of the left and right rear side longitudinal direction pressing grooves 12 and 12. FIG. It is preferable that the rear side portion of the rear longitudinal pressing groove 12 is formed so as to be gradually inclined inward in the width direction as going to the rear side. That is, it is preferable to form so that the separation width of the left and right rear longitudinal pressing grooves 12 and 12 gradually decreases toward the rear side.

  The rear portion of the rear longitudinal squeezing groove 12 may be a straight line along the longitudinal direction of the napkin or an inclined line inclined gradually outward in the width direction as it goes to the rear side, but gradually inward in the width direction as it goes to the rear side. It is preferable to form with an inclined line.

  As shown in FIG. 4, when the rear side portion of the rear longitudinal compression groove 12 is formed with an inclined line that gradually slopes inward in the width direction as going to the rear side, the rear end of the rear longitudinal compression groove 12 The angle (inclination angle α) formed by the tangential direction of the sanitary napkin 1 and the longitudinal direction line S of the sanitary napkin 1 is preferably smaller than the inclination angle β of the inclined compressed groove 14 as will be described in detail later.

  A plurality of left and right paired inclined pressing grooves 14, 14... Spaced apart in the rear longitudinal direction pressing groove 12 and inclined forward in the width direction outside are formed at intervals in the napkin longitudinal direction. Yes. The inclined squeezing groove 14 is formed symmetrically with respect to the longitudinal center line CL of the sanitary napkin 1 and has a separating portion 16 that is separated from the left and right at the central portion in the napkin width direction on at least the longitudinal center line CL. doing.

  For this reason, in this sanitary napkin 1, since the back side longitudinal direction pressing groove 12 and the inclined pressing groove 14 are spaced apart from each other at the width direction center portion of the sanitary napkin 1, they are connected at the width direction center portion. No wrinkle is generated from the bent portion. Moreover, since a pressing groove is not formed in the left-right separated part in the center part in the width direction, when leg pressure directed inward from both sides in the width direction acts when the sanitary napkin 1 is attached, this part enters the buttocks groove It becomes easy to deform | transform so that the fitting property with respect to a buttocks groove improves.

  Further, in the sanitary napkin 1, the pair of left and right inclined compressed grooves 14 that are separated to the rear side of the rear longitudinal compression groove 12 and incline forward toward the outer side in the width direction are arranged in the longitudinal direction of the sanitary napkin 1. A plurality of creases are formed at the rear of the sanitary napkin 1 so as not to be concentrated at one place. Specifically, since a plurality of right and left paired inclined compressed grooves 14 are formed at intervals in the longitudinal direction of the sanitary napkin 1, a plurality of folded wrinkles are dispersed around the inclined compressed grooves 14 as an axis. Will be formed. By forming the folded wrinkles in a dispersed manner, the depth and width of the individual folded wrinkles are smaller than when the folded wrinkles are formed in one place, and the adhesion to the skin surface is improved. The decrease is suppressed, and the leakage of body fluid can be prevented.

  The inclined compressed groove 14 is formed so as to be inclined forward toward the outer side in the width direction of the sanitary napkin 1. This is the direction along the direction of the crease formed when the sanitary napkin 1 is mounted. When the sanitary napkin 1 is attached, as described above, the wing-shaped flaps W and W are folded back to the liquid-impervious back sheet 2 side at the position of the fold line RL at the base end, and wrapped around the crotch portion of the shorts and fastened. Therefore, a tensile force directed toward the wing-shaped flap W acts on the outer end of the sanitary napkin 1 in the width direction. In addition, a tensile force directed toward the wing-shaped flap W acts on the outer edge in the width direction of the sanitary napkin due to leg pressure directed inward from both sides in the width direction centering on the formation position of the wing-shaped flaps W, W. . By these tensile forces, the folded creases formed along the width direction behind the sanitary napkin 1 are formed in an inclined shape that gradually inclines toward the front side toward the outer side in the width direction (see FIG. 5). ). Therefore, by forming the inclined compressed groove 14 to be inclined forward toward the outer side in the width direction of the sanitary napkin 1, the inclined direction of the inclined compressed groove 14 is formed along the folding crease at the time of mounting. Become so.

  The range in the longitudinal direction of the napkin in which the inclined compressed groove 14 is provided is preferably a front-rear range centering on a start position where the crotch-side buttocks contacts the ground in the state of lying on the back with the wearer extending his / her leg. This range is a portion where deformation in the longitudinal direction of the sanitary napkin 1 changes abruptly in the state of lying on its back, so that it is likely to bend and wrinkle when worn, and the effect of the present invention is easily exhibited.

  As shown in FIG. 4, the inclined compressed groove 14 has a longitudinal interval (pitch P) of the sanitary napkin 1 of 5 to 20 mm, preferably 10 to 15 mm. As a result, the creases and creases are formed along each of the inclined compressed grooves 14. When the pitch P is less than 5 mm, the napkin is not easily deformed, and the back of the napkin is difficult to bend along the buttock groove or the roundness of the buttock. Moreover, when larger than 20 mm, it will become difficult to form the fine folding wrinkles along each inclined pressing groove 14. The pitch P does not need to be constant, and can be gradually changed or arbitrarily set depending on the site as long as it is within the above range.

  The inclined compressed grooves 14 are formed in two or more pairs with respect to the longitudinal direction of the sanitary napkin 1. Preferably 3 to 8 pairs, more preferably 3 to 5 pairs. By forming a plurality of right and left pairs of inclined compressed grooves 14 spaced apart in the longitudinal direction, folds along the inclined compressed grooves 14 are formed in a dispersed manner at several locations in the napkin longitudinal direction. The individual creases are fine and small.

  As shown in FIG. 4, the inclination angle β of the inclined compressed groove 14 is 30 to 80 °, preferably 45 to 65 °, with the longitudinal line S of the sanitary napkin 1. . By setting it as this angle range, the inclined pressing groove 14 is formed substantially along the direction of the folding crease at the time of mounting. If the inclination angle β is smaller than 30 °, the inclined compressed groove 14 may overlap the rear longitudinal compressed groove 12 disposed on the front side, and the compressed grooves 12 and 14 are too close to each other and extremely rigid. Therefore, the fit may be reduced. On the other hand, when the angle is greater than 80 °, there is a low-rigidity portion where the inclined compressed groove 14 is not formed in the napkin width direction, and folding occurs along the low-rigidity portion.

  The planar shape of the inclined squeezing groove 14 is preferably substantially the same linear shape as the crease formed as shown in the drawing, but it is a curved line or a fold line protruding to the front side or the rear side in the napkin longitudinal direction. You may form in a shape. However, when it is formed in a curved line or a polygonal line, the top of the protruding part does not protrude outward in the longitudinal direction of the napkin from both ends of the inclined compressed groove 14 in order to prevent the protruding part from becoming a fold base point. Is preferable. The inclination angle β when formed in a curved line or a polygonal line may be an angle formed by a line connecting both ends of the inclined compressed groove 14 and the longitudinal line S.

  The pair of left and right inclined squeezing grooves 14 and 14 have a separation width B of 20 to 40 mm, preferably 27 to 33 mm, in the center in the width direction of the sanitary napkin 1. If it is smaller than 20 mm, a thick folded crease is likely to be formed across the width direction in the same manner as the pair of right and left inclined compressed grooves 14, 14 are connected at the center in the width direction. There exists a possibility that it may become narrow and the effect which provided the inclined pressing groove 14 may not fully be exhibited.

  As shown in FIG. 4, the front edge 14b in the longitudinal direction of the inclined compressed groove 14 is longer than the end edge 14a in the longitudinal rear side of the inclined compressed groove 14 adjacent to the front side of the sanitary napkin 1. It is preferable to arrange so as to be located on the front side in the direction. In other words, it is preferable that the inclined compressed grooves 14 and 14 adjacent to each other in the front-rear direction are arranged so as to have an overlap margin in the width direction of the sanitary napkin 1. As a result, a low-rigidity portion that is not reinforced by the inclined compressed grooves 14 is not formed in the width direction of the sanitary napkin 1, so that wrinkles associated with mounting are reliably dispersed along the plurality of inclined compressed grooves 14. Will be formed.

  Similarly to the arrangement of the inclined compressed grooves 14, 14 that are separated from each other in the front-rear direction, the edge 14 b on the front side in the longitudinal direction of the inclined compressed groove 14 that is located on the foremost side of the inclined compressed grooves 14, 14. It is preferable that the rear longitudinal pressing groove 12 is disposed so as to be positioned on the front side in the longitudinal direction of the sanitary napkin 1 from the rear edge 12a.

  The edge 14a on the rear side in the longitudinal direction of the inclined compressed groove 14 is equivalent in position to the width direction of the sanitary napkin 1 as compared with the edge 12a on the rear side in the longitudinal direction of the rear longitudinal groove 12. It is preferable that it is outside. The folded wrinkle extending outward in the width direction of the sanitary napkin 1 is easily formed with the base located at the outer side in the width direction, and the end 14a on the rear side in the longitudinal direction (in the width direction) of the inclined compressed groove 14 is located on the rear side. By disposing on the outer side in the width direction which is equal to or greater than the end edge 12a on the rear side in the longitudinal direction of the longitudinal direction compressed groove 12, it becomes easy to reliably form the folded wrinkles finely dispersed along each inclined compressed groove 14. Moreover, it becomes easy to raise the width direction center part of the formation range of the inclined pressing groove 14 to the skin side, and a fit property with a buttock groove | channel improves. Here, the positional displacement amount C in the width direction of the sanitary napkin 1 between the end edge 14a on the rear side in the longitudinal direction of the inclined compressed groove 14 and the end edge 12a on the rear side in the longitudinal direction of the rear side longitudinal direction compressed groove 12 Is 0 to 10 mm, preferably 0 to 3 mm.

  It is preferable that the inclination angle β of the inclined squeezing groove 14 and the inclination angle α of the rear side edge 12a of the rear longitudinal compression groove 12 have a relation of β> α. When the inclination angle of the squeezing groove is increased, the point of action of the folding force (extended line T extending the rear end of the squeezing groove formed in the left-right pair (in the case of a curved squeezing groove, the tangent at the rear end) is Intersection points intersecting each other on the longitudinal center line CL) are positioned near the squeezing groove, and folding wrinkles along the squeezing groove are easily formed with this action point as a base point. Therefore, finely dispersed folded wrinkles are easily formed along the plurality of inclined compressed grooves 14, 14.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Encapsulating sheet, 6 ... Middle high part, 7 ... Side nonwoven fabric, 9 ... Thread-like elastic elastic member DESCRIPTION OF SYMBOLS 10 ... Compression groove, 11 ... Front side longitudinal direction compression groove, 12 ... Back side longitudinal direction compression groove, 13 ... Front end crescent-shaped compression groove, 14 ... Inclined compression groove, 15 * 16 ... Separation part

Claims (6)

In the absorbent article in which the absorbent body is interposed between the liquid-permeable surface sheet and the liquid-impermeable back sheet,
A pair of left and right longitudinal squeezing grooves extending in the longitudinal direction of the absorbent article are formed at the rear of the absorbent article, and spaced apart to the rear side of the longitudinal squeezing groove and inclined forward in the width direction outside. The left and right pair of inclined squeezing grooves are formed with a plurality in the longitudinal direction of the absorbent article,
The said longitudinal direction pressing groove and the inclination-shaped pressing groove are respectively spaced apart from right and left in the center part of the width direction of an absorbent article, The absorbent article characterized by the above-mentioned.   The absorbent article according to claim 1, wherein the inclined compressed grooves are arranged at an interval of 5 to 20 mm with respect to the longitudinal direction of the absorbent article.   The absorbent article according to any one of claims 1 and 2, wherein an inclination angle of the inclined squeezing groove is 30 to 80 degrees with a longitudinal line of the absorbent article.   The edge of the longitudinal direction front side of the said inclined pressing groove is located in the front side of the longitudinal direction of an absorbent article rather than the edge of the longitudinal direction rear side of the inclined pressing groove adjacent to the front side. The absorbent article in any one.   The edge on the rear side in the longitudinal direction of the inclined compressed groove is equal to or outside the position in the width direction of the absorbent article as compared with the edge on the rear side in the longitudinal direction of the longitudinal pressure groove. Item 5. The absorbent article according to any one of Items 1 to 4. As the rear portion of the longitudinal squeezing groove goes to the rear side, it is formed to be gradually inclined inward in the width direction,
The absorbent article in any one of Claims 1-5 in which the inclination angle of the said inclined pressing groove is formed larger than the inclination angle of the rear side edge of the said longitudinal direction pressing groove.

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