JP2017153649A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which is excellent in fitting property with a body and prevents leakage, even when leg pressure from both sides of a width direction to inside acts during wearing of the absorbent article.SOLUTION: Two slits 20 which are along a width direction and separated in a cross direction are provided on both side parts of an area corresponding to a body fluid discharge part H of an absorber 4. An intersection of virtual lines S when the slits 20 are extended to inside is arranged on a center of the body fluid discharge part H. In an area when the area is divided into a front part and a rear part by the slits 20, the absorber 4 and a liquid permeable surface sheet 3 are not jointed, and on a width direction center side relative to the area, the absorber 4 and a rear surface sheet 2 are not jointed. The area which is divided into the front part and rear part by the slits 20, is an absorber deformation area 21 which is deformed so as to enter a non-skin side of the absorber 4 adjacent to the width direction center side, by pressure from both sides of the width direction to inside during wearing, and makes the absorber 4 on the width direction center part protrude to the skin side.SELECTED DRAWING: Figure 5

Description

  The present invention is an absorbent article mainly used for sanitary napkins, cage sheets, incontinence pads, toiletries, etc., and more specifically, two on each side of the region corresponding to the body fluid discharge site of the absorber. The slit is formed so that the region divided by the slit in front and rear is deformed so as to enter the non-skin side of the absorber adjacent to the width direction center side by the leg pressure at the time of wearing, and the absorber in the width direction center portion It is related with the absorbent article used as the absorber deformation | transformation area | region which acts so that it may protrude on the skin side.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet There is known an intervening absorber made of cotton-like pulp or the like.

  Many improvements have been made to such absorbent articles, and various types of articles that have improved fit to the body when worn have been developed. For example, in the following Patent Document 1, the absorber has an inner slit row and an outer slit row on the inner side and outer side of the middle and high side edges, and both slit rows each have a longitudinal slit extending in the front-rear direction. An absorbent article formed intermittently is disclosed. According to such an absorbent article, since it has an inner slit row and an outer slit row inside and outside the both side edges of the middle and high portions, when the napkin is deformed when worn, the absorbent body is located on the middle and high portions and both sides thereof. The absorber bends gently at the boundary of the part, and the absorber also deforms with the dispersed vertical slits constituting the inner slit row and the outer slit row as the starting point of folding both inside and outside the middle and high side edges. Therefore, the absorber bends so that the cross section along the lateral direction draws a gentle curve in the vicinity of the side edge of the mid-high portion, and even if the mounting position of the napkin is shifted back and forth, the absorber remains on the side of the mid-high portion. There are described effects such as bends reliably in the vicinity of the edge and the occurrence of twisting at the side of the absorbent main body.

  Moreover, in the following patent document 2, a pressing groove is provided on the skin contact surface side of the absorbent article so as to be at least symmetrical with respect to the center line in the longitudinal direction and surround the absorbent layer central portion. Discloses an absorbent article in which a pair of left and right intermittent portions are formed across a center line in the longitudinal direction. According to such an absorbent article, the center of the absorbent layer is directed toward the body while the protruding portion of the center of the absorbent layer is defined by the intermittent portions provided so as to be paired left and right across the longitudinal center line. It can be raised and the occurrence of twisting can be prevented. Moreover, since the cross-sectional shape of the central part of the absorbing layer when it is raised is a trapezoidal shape, the effect that the absorbing area of the absorber can be provided widely is described.

  Furthermore, in the following Patent Document 3, the absorber includes at least two layers, an upper layer and a lower layer, and each of the upper layer and the lower layer has a plurality of cuts in each of the portions located on both sides in the longitudinal direction of the absorber. There is disclosed an absorbent article in which the cut in the upper layer and the cut in the lower layer are formed at positions where they do not overlap in the longitudinal direction of the absorbent body. According to such an absorbent article, since both side portions in the longitudinal direction of the absorbent body are flexibly extended by opening the cuts in the sheet-like absorbent body, the cross-sectional shape in the longitudinal direction is directed upward with respect to the napkin. When a force that deforms into a concave is applied, both sides in the longitudinal direction of the absorbent body are smoothly extended, and the longitudinal section of the absorbent body is gently curved concavely toward the skin contact surface side. It becomes a shape, and the cross section in the width direction also has a shape gently curved convexly toward the skin contact surface side. Therefore, both sides of the elongated absorbent body can be contracted by receiving an external force, so that the follower with respect to the movement of the wearer is excellent, and the state fitted to the wearer's body shape is stably maintained. , Etc. are described.

JP, 2015-51171, A JP 2009-273724 A JP 2013-52290 A

  However, in the absorbent article described in Patent Documents 1 to 3, when pressure (leg pressure) inward from the width direction both sides is applied by the inner portion of the base of the leg during wearing, both sides of the absorbent body are extremely inside. As a result, the absorbent article could not be maintained in a moderately deformed state, and the fit with the body might be reduced. In addition, due to a decrease in fit, there is a possibility that a gap is generated between the skin surface and leakage of body fluid that travels along the skin surface.

  Therefore, a main problem of the present invention is to provide an absorbent article that is excellent in fit with the body and prevents leakage even when leg pressure inward from both sides in the width direction acts upon wearing.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
Two slits are provided on both sides of the region corresponding to the body fluid discharge site of the absorber, respectively, along the width direction and apart from each other in the front-rear direction. In the region where the front and back are separated by the slit, the absorber and the liquid-permeable surface sheet are non-bonded in the region located at the center, and the width direction center side from this region, The absorber and the back sheet are non-bonded,
The region where the front and rear are separated by the slit is deformed so as to enter the non-skin side of the absorbent body adjacent to the width direction center side by the pressure inward from both sides in the width direction at the time of wearing, and the absorbent body in the width direction center portion Provided is an absorbent article characterized in that it is an absorbent body deformation region that acts to raise the skin toward the skin side.

  In the first aspect of the present invention, two slits are provided on both sides of the region corresponding to the body fluid discharge site of the absorber, respectively, along the width direction and spaced forward and backward, extending the slit inward. The intersection of the imaginary lines is arranged at the center of the body fluid discharge site. Further, in the region where the front and rear are separated by the slit, the absorber and the liquid-permeable surface sheet are not joined, and the absorber and the back sheet are not joined in the center in the width direction from this region. It is said that. Thereby, the region where the front and rear are separated by the slit is deformed so as to enter the non-skin side of the absorbent body adjacent to the center in the width direction by the pressure (leg pressure) inward from the both sides in the width direction at the time of wearing, It is an absorber deformation region that acts to raise the absorber at the center in the width direction to the skin side. In this way, by forming the absorber deformation region, even when leg pressure inward from both sides in the width direction is applied during wearing, the absorber deformation region is located on the non-skin side of the absorber on the width direction center side. Body fluid that is deformed so as to penetrate and the absorbent body at the center in the width direction is raised to the skin side, so that it has excellent fit with the body and there is no gap between the absorbent article and the skin surface. Leakage can be prevented.

  According to a second aspect of the present invention, there is provided a middle and high part of the absorbent body on the skin side at the center part in the width direction of the absorbent article, and the slit is formed on the outer side in the width direction than the middle and high part. An absorbent article according to 1 is provided.

  In the invention of claim 2, since the middle and high part of the absorbent body is provided on the skin side at the center part in the width direction of the absorbent article, and the slit is formed on the outer side in the width direction than the middle and high part, When the absorber deformation region is deformed so as to enter the non-skin side of the absorber on the center side in the width direction due to leg pressure, the middle and high parts work so as to rise to the skin side, so that the fit with the body is further improved To improve.

  As the present invention according to claim 3, squeezing grooves that are recessed from the outer surface side of the liquid-permeable surface sheet toward the back sheet side are formed on both sides of the region corresponding to the body fluid discharge site, respectively, The absorbent article according to any one of claims 1 and 2, wherein the compressed groove is formed so as to be separated from the slit.

  In the invention according to claim 3, when the pressing grooves are formed on both side portions of the region corresponding to the body fluid discharge site, the pressing grooves are formed so as to be separated from each other in the slit. The deformation of the deformation region can be deformed to a predetermined state by the leg pressure without being obstructed by the pressing groove. Moreover, it becomes easy to perform a deformation | transformation on the basis of this pressing groove by providing the said pressing groove in the said absorber deformation | transformation area | region.

  As a fourth aspect of the present invention, the slit extends linearly from the side edge of the absorber toward the center of the body fluid discharge site or from the side edge of the absorber toward the center of the body fluid discharge site. The absorbent article according to any one of claims 1 to 3, wherein the absorbent article extends in a curved shape bulging toward the center line in the longitudinal direction.

  In the invention of claim 4, the planar shape of the slit may be formed so as to extend linearly from the side edge of the absorber toward the center of the body fluid discharge site, or from the side edge of the absorber. It may be formed so as to extend in a curved shape that bulges toward the center line in the longitudinal direction toward the center of the body fluid discharge site. When the slit is formed in a curved shape that bulges to the longitudinal center line side, it becomes a shape along the inner part of the base of the leg, so that the leg pressure acts on the slit almost evenly, The deformation of the absorbent body deformation area will be performed smoothly, and without excessive force applied to the absorbent body part in the center in the width direction, this part can be prevented from twisting and wrinkling, making it more fit with the body It will be further improved.

  As this invention which concerns on Claim 5, the said slit consists of a continuous line or an intermittent line, The absorbent article in any one of Claims 1-4 is provided.

  In the invention according to claim 5, when the slit is a continuous line, the absorber deformation region is not easily deformed by leg pressure, and when the slit is an intermittent line, absorption of the absorber deformation region is not performed. The body can be prevented from collapsing.

  As the present invention according to claim 6, the absorber comprises an upper layer disposed on the skin side and a lower layer disposed on the non-skin side, the slit is formed in the lower layer, and the slit is formed in the upper layer. An absorbent article according to any one of claims 1 to 5, wherein no is formed.

  In the invention described in claim 6, the absorber has a two-layer structure of an upper layer and a lower layer, and the slit is provided only in the lower layer. As a result, the absorber in the absorber deformation region can be prevented from collapsing. In addition, in this embodiment, when it receives a leg pressure at the time of mounting | wearing, it deform | transforms so that only a lower layer absorber may enter into the non-skin side of the absorber of the width direction center side.

  As the present invention according to claim 7, side nonwoven fabrics that form three-dimensional gathers are disposed on both sides of the skin contact surface side, and the side nonwoven fabric has a non-skin contact region that overlaps the absorber deformation region. The absorbent article according to any one of claims 1 to 6, wherein the absorbent article according to any one of claims 1 to 6 is a non-adhesive region that does not adhere to a member on the surface side, and the other region is an adhesive region that adheres to a member on the non-skin contact surface side. Provided.

  In the invention according to claim 7, in the case where side nonwoven fabrics each forming a three-dimensional gather are disposed on both side portions on the skin contact surface side, the side nonwoven fabric has a non-skin area that overlaps the absorber deformation area. By using a non-adhesive area that does not adhere to the contact surface side member (liquid-permeable surface sheet), the edge of the absorbent nonwoven deformed area is cut off from the side nonwoven fabric, so the absorbent deformable area is deformed inward by leg pressure. As a result, it is possible to prevent the standing shape of the three-dimensional gather from being deformed, the fit between the three-dimensional gather and the body is not lowered, and the body fluid blocking effect can be maintained.

  As the present invention according to claim 8, side nonwoven fabrics that form three-dimensional gathers are disposed on both side portions on the skin contact surface side, and the side nonwoven fabric has a region overlapping the slit on the non-skin contact surface side. The absorbent article according to any one of claims 1 to 6, wherein the absorbent article according to any one of claims 1 to 6 is provided as a non-adhesion area that does not adhere to a member, and the other area is an adhesion area that adheres to a member on the non-skin contact surface side. .

  In the invention described in claim 8, the side nonwoven fabric is made non-adhering in the region overlapping with the slit, thereby preventing the deformation of the three-dimensional gather accompanying the deformation of the absorber deformation region due to leg pressure.

  As described above in detail, according to the present invention, even when a leg pressure directed inward from both sides in the width direction is applied at the time of wearing, the fitting with the body is excellent and leakage 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. (A) is a top view of the absorber 4 before a deformation | transformation and (B) shows after a deformation | transformation. It is a cross-sectional view of the sanitary napkin 1 showing a deformed state at the time of wearing (a view taken along line II-II in FIG. 1). It is a top view of absorber 4 concerning a modification. It is a top view of absorber 4 concerning a modification. It is a top view of absorber 4 concerning a modification. It is a cross-sectional view (II-II arrow line view of FIG. 1) of the sanitary napkin 1 which concerns on a modification. It is a cross-sectional view (II-II line arrow view of FIG. 1) of the sanitary napkin 1 which concerns on the modification which shows the deformation | transformation state of a mounting state. It is a top view of the sanitary napkin 1 which shows the adhesion area | region (the 1) of the side nonwoven fabric 7. FIG. It is a top view of the sanitary napkin 1 which shows the adhesion area | region (the 2) of the side nonwoven fabric 7. FIG. It is a top view of sanitary napkin 1 concerning a modification.

  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 Wing-like flaps W and W which are joined by joining means such as adhesives such as hot melt, heat sealing, ultrasonic sealing, etc., and project laterally by the laminated sheet portion of these liquid-impermeable back sheet 2 and side nonwoven fabric 7 together they are formed, which flap hip hold the portion located on the buttocks side of the W _B, in which W _B are 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.

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 dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.

  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.

  In the sanitary napkin 1 according to the present embodiment, as shown in FIG. 1 and FIG. 2, the absorbent body 4 has a high absorbent body on the skin side in a region at the center in the width direction and including the body fluid discharge site H. Although the middle-high part 6 is provided, the middle-high part 6 may not be provided. The middle-high portion 6 is disposed adjacent to the skin side surface of the absorbent body 4, and is formed with a width dimension and a longitudinal dimension shorter than those of the absorbent body 4. The thickness of the middle-high portion 6 is preferably 3 to 25 mm, preferably 5 to 18 mm, because if the thickness is too large, the rigidity of the absorber 4 increases and the adhesion to the body decreases.

  It is preferable to form the pressing grooves 8 that are recessed from the outer surface side of the liquid-permeable top sheet 3 toward the liquid-impervious back sheet 2 at least on both side portions in the vicinity of the middle-high portion 6. The compressed grooves 8 are formed on both sides of a region corresponding to at least the body fluid discharge site H, and in the example shown in FIG. 1, the region including the body fluid discharge site H and the central portion of the buttocks groove is substantially closed in the circumferential direction. It is given in the shape to be. The squeezing groove 8 is obtained by squeezing a member from the liquid-permeable surface sheet 3 to the absorber 4 by squeezing from the outer surface side of the liquid-permeable surface sheet 3. The pressing groove 8 is provided to prevent the middle / high portion 6 from being misaligned, to precisely define the middle / high portion 6 and to improve the fit to the buttock groove. The compressed grooves 8 are preferably arranged apart from each other by a slit 20 described later, which will be described in detail later. In the illustrated example, curved squeezing grooves 9 and 10 that bulge outward in the longitudinal direction are formed before and after the squeezing groove 8, respectively.

  The middle-high portion 6 includes at least pulp fiber and synthetic fiber, and the ratio of the pulp fiber: synthetic fiber is 80 to 20:20 to 80, preferably 40 to 60:60 to 40 in terms of weight. Things are 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.

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. A pair of left and right wing-shaped flaps W and W are formed at the absorbent body side position substantially corresponding to the body fluid discharge portion by the laminated sheet portion of the side nonwoven fabric 7 and the liquid-impermeable back sheet 2. The hip hold flaps W _B and W _B are formed at the hip side (rear side) position. 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, when worn against shorts, line folding the wing-shaped flaps W, W folded on the opposite side at the RL location, 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, while the inner side part of the said side nonwoven fabric 7 is folded back substantially double, the thread-like elastic elastic member by which the appropriate position of the both ends or the longitudinal direction was fixed to the height direction intermediate part inside this double sheet | seat 11, and a plurality of, in the illustrated example, two thread-like elastic stretch members 12, 12 are fixed at both ends or at appropriate positions in the longitudinal direction at the upper portion of the thread-like elastic stretch member 11. It is arranged. As shown in FIG. 2, the double sheet portion is bonded to the absorbent body 4 side in a state of being folded and laminated in a Z-shaped cross section at the front and rear end portions as shown in FIG. A pair of left and right three-dimensional gathers BS and BS standing on the surface side are formed while forming pockets P and P with an opening facing inward in the shape of a cross-section with the elastic stretchable member 11 provided as a bending point.

[About Absorber Deformation Area]
In the sanitary napkin 1, as shown in FIG. 1 and FIG. 4 (A), the both sides of the region corresponding to the body fluid discharge site H of the absorbent body 4 are along the napkin width direction and are spaced apart in the front-rear direction. Two slits 20, 20 are provided, and are arranged so that the intersection of the imaginary line S extending the slit 20 inward is located at the center of the body fluid discharge site H.

  The slit 20 is a cut portion of the absorbent body 4 formed with a predetermined length from the side edge of the absorbent body 4 toward the longitudinal center line CL of the sanitary napkin 1. The slit 20 is formed over the thickness direction so as to penetrate the front and back of the absorber 4. In the slit 20, it is preferable that a space portion having a predetermined width is formed, but an end portion of a fiber constituting the absorber 4 protrudes from the side surface of the slit 20 into the slit 20. You may form so that it may not have width substantially. The width of the slit 20 is 5 mm or less, preferably 3 mm or less.

  The slit 20 is formed substantially along the width direction of the absorber 4. Specifically, among the two slits 20 and 20 formed on both sides of the absorber 4, the front slit 20 extends so as to incline to the rear, and the rear slit 20 inclines to the front. It extends like so. An imaginary line S extending inward from the inner edge of the slit 20 is formed so as to intersect at the center of the body fluid discharge site H. The central portion of the body fluid discharge site H is a portion that is substantially the center of the wearer's blood drainage port (urination port), and this position is slightly different depending on the mounting position and body shape. It is a part to have. Therefore, the slits 20, 20... Need only be close to each other even if the inner extension lines do not intersect at a precise point on the longitudinal center line CL. This range is 10 mm or less, preferably 5 mm or less on the longitudinal center line CL.

  In the area where the front and rear are separated by the slits 20 and 20, as shown in FIG. 2, the absorbent body 4 and the liquid-permeable surface sheet 3 are non-joined areas 22 that are not joined. In the region closer to the center in the width direction than this region, a non-bonded region 23 is formed in which the gap between the absorbent body 4 and the liquid-impermeable back sheet 2 is not bonded. On the other hand, in the middle / high portion 6 arrangement region between the non-joining regions 22 and 22 on both sides, the middle / high portion 6 and the liquid-permeable surface sheet 3 are formed as a joining region 24 joined by a hot melt adhesive or the like. It is preferable that both side portions of the non-bonding region 23 are bonding regions 25 in which the absorbent body 4 and the liquid-impermeable back sheet 2 are bonded with a hot melt adhesive or the like.

  As shown in FIGS. 4B and 5, the area divided by the slits 20, 20 is a pressure (leg pressure) inward from the both sides in the width direction by the inner part of the base of the leg when worn. Therefore, the absorbent body 4 is deformed so as to enter the non-skin side of the absorbent body 4 adjacent to the width direction central side, thereby forming an absorbent body deformation region 21 that acts to raise the absorbent body 4 in the width direction central part to the skin side. .

  When the leg deformation directed inward from both sides in the width direction is applied at the time of wearing, the absorbent body deformation region 21 is formed inward in the width direction with a phantom line connecting the front ends of the front and rear slits 20 and 20 in the longitudinal direction of the napkin or the vicinity thereof as a base end. And the intermediate portion is bent outward in the width direction, so that it moves so as to enter the non-skin side of the absorbent body 4 adjacent to the center side in the width direction while being deformed so as to form a cross-section Z shape. At this time, the skin side of the absorbent body deformation region 21 is cut off from the liquid-permeable surface sheet 3 by the non-joining region 22, and the non-skin side between the absorbent body deformation regions 21, 21 on both sides is Since the liquid-impervious backsheet 2 is bordered by the joining region 23, the deformation of the absorber deformation region 21 is performed without being restricted by the liquid-permeable topsheet 3 or the liquid-impervious backsheet 2. It becomes easy to make it go into the non-skin side of the absorber of the width direction center part, and to make the absorber of the center part of the width direction rise to the skin side.

  As shown in FIG. 5, the cross-sectional shape of the absorbent body 4 when the sanitary napkin 1 is mounted is such that the absorbent body deformation region 21 is bent into a cross-section Z shape by the leg pressure inward from both sides in the width direction. The absorbent body 4 enters the non-skin side of the absorbent body 4 at the central portion, and the absorbent body 4 at the central portion in the width direction is gently convexly curved toward the skin side so as to be bulged toward the skin side, so that the entire body is deformed into a substantially Ω shape. become. For this reason, while the width direction center part which protruded to the skin side is closely_contact | adhered to a body, it is excellent in fitting property, and a clearance gap does not arise between bodies, but it becomes possible to prevent the leakage of a bodily fluid. At this time, it is preferable that the middle and high portions 6 are provided at the center in the width direction as in the illustrated example because the sanitary napkin 1 can be more closely attached to the body.

  As shown in FIG. 4A, the size of the absorbent deformable region 21 is a length L1 in the longitudinal direction of the napkin on the outer side in the width direction of the absorbent deformable region 21 (before and after the side edge of the absorbent body 4). The length between the slits 20 and 20) is 55 to 85 mm, preferably 65 to 75 mm. Further, the length L2 of the napkin in the width direction inside the absorber deformation region 21 (the length between the front and rear slits 20 and 20 at the inner edge of the slit 20) is 20 to 50 mm, preferably 35 to 45 mm. It is good to do. Furthermore, the length M of the absorbent body deformation region 21 in the napkin width direction is 10 to 30 mm, preferably 15 to 25 mm. The inclination angle θ of the slit 20 with respect to the side edge of the absorber 4 is 30 to 80 °, preferably 45 to 65 °. The inclination angle θ of the slit 20 may be the same or different between the front and rear slits 20.

  As described above, the position of the absorber deformation region 21 is formed such that the intersection of the virtual line S obtained by extending the center line of the slit 20 inward is located at the center of the body fluid discharge site H. More specifically, it is preferable that the outer edge (side edge of the absorber 4) of the absorber deformation region 21 is located within the range of the base end length of the wing-shaped flap W. Thereby, since the absorber deformation | transformation area | region 21 is located in the range of the wing-shaped flap W where leg pressure tends to act, the said absorber deformation | transformation area | region 21 becomes easy to deform | transform with leg pressure. Further, when the position of the absorber deformation region 21 is defined from another viewpoint, the napkin width direction line CW passing through the intersection of the imaginary line extending the slit 20 inward is an intermediate portion of the longitudinal range of the wing-shaped flap W, preferably Is preferably disposed so as to pass through the center in the longitudinal direction of the wing-shaped flap W. Specifically, the distance in the napkin longitudinal direction between the napkin width direction line CW and the longitudinal central portion of the wing-shaped flap W is preferably within 20 mm, preferably within 10 mm, and more preferably within 5 mm.

  You may make it give this absorber deformation | transformation area 21 firmness by giving a pressing part to the said absorber deformation | transformation area | region 21 with a various pattern. The said pressing part is formed by pressing from the skin side or the non-skin side of the absorber 4 which comprises the absorber deformation | transformation area | region 21. As shown in FIG. As the pattern of the compressed portion, vertical stripes composed of a plurality of grooves along the napkin longitudinal direction and spaced apart in the width direction, horizontal stripes composed of a plurality of grooves along the napkin width direction and spaced apart in the longitudinal direction, a lattice shape, It can be formed in various patterns such as an oblique lattice shape, a regular lattice, or a dot shape arranged in a staggered lattice.

  As shown in FIG. 1 and FIG. 4 (A), when the middle-high portion 6 is disposed at the center in the width direction of the absorber 4, the slit 20 is formed on the outer side in the width direction than the middle-high portion 6. Is preferred. In other words, it is preferable that the slit 20 is formed with the outer position in the vicinity of the middle-high portion 6 as an inner end. Thereby, when the absorber deformation | transformation area | region 21 deform | transforms by leg pressure at the time of mounting | wearing, since it will come in to the non-skin side of the absorber 4 in which the middle-high part 6 of the width direction center part has been arrange | positioned, the middle-high part 6 is made still more. It becomes easy to protrude toward the skin side, and the adhesion to the body is further improved. The separation distance in the napkin width direction between the middle high portion 6 and the inner end of the slit 20 is 10 mm or less, preferably 5 mm or less.

  As shown in FIG. 1, when the pressing groove 8 is formed, the pressing groove 8 is preferably formed so as to be separated forward and backward in the slit 20. In other words, the compressed grooves 8 formed from the front side to the rear side of the absorbent body deformation region 21 along the longitudinal direction of the napkin are respectively divided at both sides of the region corresponding to the body fluid discharge site H at the portion where the slit 20 passes. It is preferable to form so as to. Thus, the absorber deformation region 21 is reliably divided in the front-rear direction by the front and rear slits 20, 20, and only the absorber deformation region 21 can be deformed by leg pressure. Moreover, since the pressing groove 8 along the napkin longitudinal direction passes through the proximal end portion of the absorbent body deformation region 21, the absorbent body deformation region 21 is easily bent with the compression groove 8 as a base point as shown in FIG. Become.

  As shown in FIGS. 1 and 4A, the planar shape of the slit 20 can be formed so as to extend linearly from the side edge of the absorbent body 4 toward the central portion of the body fluid discharge site H. . By forming it in a straight line, the slit 20 can be provided relatively easily, and the absorber deformation region 21 can easily move along the slit 20 by leg pressure from both sides in the width direction.

  Further, as shown in FIG. 6, the planar shape of the slit 20 extends in a curved shape bulging from the side edge of the absorbent body 4 toward the center of the body fluid discharge site H toward the longitudinal center line CL. You may form in. In the illustrated example, the slits extend in an arc shape from both side edges of the absorbent body 4 toward the inside, and arcuate virtual lines S, S extending the slit 20 inward contact at the center of the body fluid discharge site H. It is formed as follows. By forming such a curved shape, the slit 20 has a shape along the inner part of the base of the leg, so that the leg pressure acts on the slit 20 almost evenly, and the absorber deformation region 21. Since the deformation of the portion becomes smooth and no extra force is applied to the absorbent body portion in the central portion in the width direction, twisting and wrinkling of this portion can be prevented, and the fit with the body can be further improved.

  The slit 20 may be a continuous line in which a continuous cut is formed from the absorber side edge to the inner end of the slit 20 as shown in FIG. 4 (A), or as shown in FIG. It is good also as an intermittent line provided with the intermittent part 20a to divide. In the case of the continuous line, the absorber deformation region 21 is easily deformed by leg pressure. On the other hand, since continuous cuts are formed, the absorbent body in the absorbent body deformation region 21 collapses when the absorbent body has a low density or a low basis weight, or when high rigidity means such as embossing is not taken. There is a fear. On the other hand, when the slit 20 is an intermittent line, the absorber can be prevented from collapsing and can be easily deformed by leg pressure. If too many intermittent portions 20a are provided, the deformation of the absorber deformation region 21 is unlikely to occur, so the number of the intermittent portions 20a is preferably within three, preferably about one.

  As shown in FIGS. 8 and 9, the absorbent body 4 includes an upper layer 4A disposed on the skin side and a lower layer 4B disposed on the non-skin side, and the slit 20 is formed in the lower layer 4B. The slit 20 may not be formed in the upper layer 4A. Accordingly, since the absorber deformation region 21 formed in the lower layer 4B has a two-layer structure with the upper layer 4A, the absorber can be prevented from collapsing, and the absorber deformation region 21 can be reliably deformed. In this embodiment, when a leg pressure is applied during wearing, as shown in FIG. 10, only the absorber deformation region 21 of the lower layer 4B is deformed so as to enter the non-skin side of the absorber portion at the center in the width direction. To do. In the illustrated example, the lower layer 4B is spaced apart at the center in the width direction and is disposed on the left and right sides, but may be composed of a single sheet that is continuous in the width direction.

  Next, the adhesion area | region of the said side nonwoven fabric 7 is demonstrated. As shown in FIG. 11, the side nonwoven fabric 7 has a non-adhesive region 26 in which the region overlapping the absorber deformation region 21 does not adhere to the non-skin contact surface side member (liquid-permeable surface sheet 3). It is preferable that the area other than the non-skin contact surface side is a bonding area 27 that adheres to a member (liquid permeable top sheet 3 or liquid permeable back sheet 2). By providing the non-adhesive region 26, the absorbent body deformation region 21 is not adhered to the liquid-permeable surface sheet 3, and the side nonwoven fabric 7 is also non-adhered, and the absorbent body deformation region 21 and the side nonwoven fabric 7 are not bonded. Since the edge is cut, it is possible to prevent the standing shape of the three-dimensional gather BS from being deformed as the absorber deformation region 21 is deformed inward by leg pressure, and the fit between the three-dimensional gather BS and the body does not deteriorate, The damming effect of body fluid can be maintained. On the other hand, the front and rear sides of the absorbent body deformation region 21 are the adhesive regions 27. Therefore, both side portions of the absorbent body 4 are reinforced by the side nonwoven fabric 7, and even when subjected to leg pressure, The twist can be prevented.

  The non-adhesion region 26 of the present embodiment is preferably formed so as to extend from the absorber deformation region 21 to a position slightly outside in the napkin longitudinal direction and the napkin width direction. The length of the non-adhesion region 26 in the napkin longitudinal direction is 30 to 50 mm, preferably 35 to 45 mm.

  Moreover, as other embodiment regarding the adhesion area | region of the side nonwoven fabric 7, as FIG. 12 shows, as for the said side nonwoven fabric 7, the area | region which overlaps with the said slit 20 is a member (liquid-permeable surface) on the non-skin contact surface side. The non-adhesive region 26 that does not adhere to the sheet 3) is used, and the other region is the adhesive region 27 that adheres to the non-skin contact surface side member (the liquid-permeable surface sheet 3 or the liquid-impervious back sheet 2). be able to. By making the said side nonwoven fabric 7 non-adhering in the area | region which overlaps with the slit 20, the deformation | transformation of the three-dimensional gather BS accompanying the deformation | transformation of the absorber deformation | transformation area | region 21 by leg pressure can be prevented similarly to the above. Moreover, in this embodiment, since the side edge part of the absorber deformation | transformation area | region 21 is covered with the joining sheet | seat part of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7, collapse of the absorber deformation | transformation area | region 21 by leg pressure can be suppressed. It becomes like this.

  Also in the present embodiment, it is preferable that the non-adhesion region 26 is formed so as to extend slightly from the region overlapping the slit 20 to a position outside the napkin longitudinal direction and width direction. The length of the non-adhesive region 26 in the napkin longitudinal direction is 3 to 20 mm, preferably 5 to 10 mm.

  As shown in FIG. 13, by providing two slits 30, 30... That are separated from each other on both sides of the buttock side, the region that is divided by the slits 30, 30, With the pressure inward from both sides in the width direction, the absorber 4 at the center in the width direction is raised so as to fit the cracked portion by being deformed so as to enter the non-skin side of the absorber adjacent to the center in the width direction. You may make it become the absorber deformation | transformation area | region 31. FIG.

  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, 8-10 ... Squeeze groove , 11... ... thread-like elastic elastic member, 20 ... slit, 21 ... absorber deformation region, 22 · 23 ... non-adhesion region, 24 · 25 ... adhesion region, 26 ... non-adhesion region, 27 ... adhesion region

Claims (8)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
Two slits are provided on both sides of the region corresponding to the body fluid discharge site of the absorber, respectively, along the width direction and apart from each other in the front-rear direction. In the region where the front and back are separated by the slit, the absorber and the liquid-permeable surface sheet are non-bonded in the region located at the center, and the width direction center side from this region, The absorber and the back sheet are non-bonded,
The region where the front and rear are separated by the slit is deformed so as to enter the non-skin side of the absorbent body adjacent to the width direction center side by the pressure inward from both sides in the width direction at the time of wearing, and the absorbent body in the width direction center portion An absorbent article, characterized in that it is an absorbent body deformation region that acts to raise the skin toward the skin.   The absorptive article according to claim 1 in which a middle high part of a high absorber is provided in the skin side in the central part of the width direction of said absorptive article, and said slit is formed in the width direction outside from said middle high part.   A pressing groove that is recessed from the outer surface side of the liquid-permeable surface sheet toward the back sheet side is formed on both side portions of the region corresponding to the body fluid discharge site, and the pressing groove is separated at the slit. The absorbent article according to claim 1, which is formed as described above.   The slit extends linearly from the side edge of the absorber toward the center of the body fluid discharge site or bulges from the side edge of the absorber toward the center of the body fluid discharge site toward the longitudinal center line The absorbent article according to any one of claims 1 to 3, which extends in a curved shape.   The absorbent article according to claim 1, wherein the slit is a continuous line or an intermittent line.   The said absorber consists of the upper layer arrange | positioned at the skin side, and the lower layer arrange | positioned at the non-skin side, The said slit is formed in the said lower layer, The said slit is not formed in the said upper layer. 5. The absorbent article according to any one of 5.   Side nonwoven fabrics that form three-dimensional gathers are arranged on both sides of the skin contact surface side, and the side nonwoven fabric is non-adhesive so that the region overlapping the absorber deformation region does not adhere to the member on the non-skin contact surface side The absorbent article according to any one of claims 1 to 6, wherein the absorbent article according to any one of claims 1 to 6, wherein the other area is an adhesive area that adheres to a member on the non-skin contact surface side.   Side nonwoven fabrics that form three-dimensional gathers are disposed on both side portions on the skin contact surface side, and the side nonwoven fabric has a region that overlaps the slit as a non-adhesion region that does not adhere to the member on the non-skin contact surface side. The absorbent article according to any one of claims 1 to 6, wherein the other area is an adhesive area that adheres to a member on the non-skin contact surface side.

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