JP5924898B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad for absorbing menstrual blood, cages, and the like, and relates to an absorbent article that follows the movement of the buttock and adheres to the groove of the buttock.

  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.

  Numerous improvements have been made on this type of absorbent article, and various means have been taken to bring it into close contact with the groove of the buttocks. For example, in the following Patent Document 1, as the absorbent body, the front middle and the high are protruded convexly toward the skin contact surface side narrower than the absorbent body on the skin contact surface side in the front part and the rear part of the absorbent article. And a pair of front grooves provided symmetrically about a center line extending in the longitudinal direction of the absorbent article, and formed in the width direction of the absorbent article. By forming an outwardly convex shape and forming an intermediate groove extending in the width direction of the absorbent article and projecting toward the rear middle high portion between the front middle high portion and the rear middle high portion Even if a force that deforms the middle / high part is generated in either the front part or the rear part of the absorbent article, the deforming force is not transmitted to the other part, and no gap is generated between the absorbent article and the front middle / high part. Thus, the absorbent article which improved the adhesiveness to the groove | channel of a collar part is disclosed.

  Moreover, in the following patent document 2, a pair of compressed grooves that are recessed from the skin side surface toward the clothing side surface are extended in the vertical direction at positions away from the vertical center line on both the left and right sides. The pair of compressed grooves is formed in a pattern in which the interval is the narrowest at the horizontal reference line, and the interval is widened at a position away from the horizontal reference line in the front-rear direction. A flexible portion that is recessed from the surface toward the skin-side surface is provided, and this flexible portion extends toward the edge of the absorbent article with a position away from the lateral reference line as a base end, Since at least a part of the flexible part is located between the compression groove and the compression groove, the compression groove is located on both sides of the flexible part in the rear part. The pressure is transmitted to the compressed groove and acts to narrow the interval between the compressed grooves. There since become transmitted to the flexible portion, the absorbent article portion having a flexible portion has to be deformed bend into close contact in the cleft of the buttocks is disclosed.

JP 2010-131297 A JP 2004-208919 A

  However, in the absorbent articles described in Patent Documents 1 and 2, it is difficult to follow a movement in which the width and depth of the groove of the buttock changes when the leg is moved, so When the width of the groin groove is wide and shallow when walking or walking (when the groin groove is opened), a gap is formed between the absorbent article and the groin groove to cause menstrual blood There was a risk of leaking.

  Then, the main subject of this invention is providing the absorbent article which was easy to follow the change of the groove shape of the collar part accompanying the movement of a collar part, and prevented the transmission leak to the rear part side.

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,
The absorbent body has an absorbent body formed from the front side to the rear side of the absorbent article, a rear side of the absorbent body and a portion corresponding to the groove of the buttock, and a longitudinally central portion in the width direction. A central convex portion that protrudes toward the skin contact surface side from the upper surface of the absorbent main body, and spaced apart in the width direction of the absorbent article on both sides thereof from the upper surface of the absorbent main body along the longitudinal direction. Provided is an absorbent article characterized in that it has both convex portions protruding to the skin contact surface side, and the central convex portion is formed to have a higher protruding height than the both convex portions. .

In the invention of claim 1, as an absorbent body, an absorbent body formed from the front side to the rear side of the absorbent article, and a portion corresponding to the groove of the buttocks on the rear side of the absorbent body, The central convex part which protrudes to the skin contact surface side from the upper surface of the absorptive main body along the longitudinal direction at the central part in the width direction, and is spaced apart in the width direction of the absorbent article on both sides along the longitudinal direction. By providing both side protrusions that protrude to the skin contact surface side from the upper surface of the absorbent main body, and by forming the central protrusion higher than the protrusions on both sides, the groove shape of the buttocks Uses a structure with a surface shape of the absorber that is suitable .

Accordingly, when the width of the groove of the buttock is wide and shallow (when the groove of the buttock is opened), such as when turning over or walking, the central protrusion and the both side protrusions remain as they are. If the width of the groin groove is narrow and the depth becomes deep (when the groin groove is closed), such as when you are lying on your back, while fitting in the groin groove, Due to the pressure inward from both sides in the width direction from the part and the heel part, the rear side of the absorber is deformed so as to rise to the skin contact surface side, and the both side convex parts are connected to both sides with the central convex part as a vertex. As a whole, it deforms into a sharp mountain shape and fits into the back of the groove in the buttock. Here, since the central convex portion and the convex portions on both sides are provided apart in the width direction of the absorbent article, the degree of freedom of deformation of the convex portions on both sides is high, and the convex portions on both sides according to the open / close state of the groove in the flange Can be appropriately deformed to fill the groove of the buttock. Therefore, it is easy to follow the change in the groove shape of the collar portion accompanying the movement of the collar portion, and it is possible to reliably prevent transmission leakage to the rear side.

As this invention which concerns on Claim 2, the said absorber is the width direction center part of an absorbent article over the length of the longitudinal direction of the absorbent article in which the said center convex part and the both-side convex part are formed at least. The absorbent article according to claim 1, further comprising a thin portion in which a surface on the underwear contact surface side is recessed along the longitudinal direction.

In the invention of the second aspect, at least the longitudinal direction length of the absorbent article in which the central convex part and the both side convex parts are formed , along the longitudinal direction at the central part in the width direction of the absorbent article. By making the absorbent body with a thin-walled part with a concave surface on the underwear contact surface side, it becomes easier to deform into a mountain shape that protrudes to the skin contact surface side with the central convex portion at the top during deformation of the absorbent body Yes.

As this invention which concerns on Claim 3 , the said absorber is comprised by arrange | positioning the said center convex part and both-sides convex part of a separate body in the skin contact surface side of an absorber main body, In the said absorber main body, The absorbent article according to any one of claims 1 and 2, wherein a compression portion of the absorbent fiber is provided along the longitudinal direction with respect to the arrangement surfaces of the central convex portion and the both side convex portions. .

In the invention of claim 3 , the absorbent body is divided into an absorbent body, a central convex portion, and convex portions on both sides, and each of the absorbent body is elongated with respect to the arrangement surface of the central convex portion and the convex portions on both sides. By providing the compression part of the absorbent fiber along the direction, the rigidity of the absorbent body of the part where the central convex part and the convex part on both sides are disposed can be increased, and the twist of the absorbent body can be prevented. Become. In addition, since the fiber density of the compressed part increases, the liquid diffusibility in the longitudinal direction of the absorbent article along the compressed part is improved, for example, the amount of body fluid that exceeds the absorption limit in the width direction or the thickness direction of the absorbent article is absorbed. Even if it is done, no leakage will occur.

As the present invention according to claim 4 , there is provided the absorbent article according to any one of claims 1 to 3 , wherein the center convex portion and the both side convex portions include crimped fibers.

In the invention of claim 4 above, by including crimped fibers in the central convex portion and the convex portions on both sides raised on the skin contact surface side, the restoring properties of the central convex portion and both convex portions are improved. It makes it easy to follow changes in the groove shape.

As the present invention according to claim 5 , embossing from the upper surface side of the liquid-permeable surface sheet is provided on the outer side in the width direction of the both side convex portions, or the liquid-permeable surface sheet on the outer side in the width direction of the both side convex portions. together with the embossing of the top side is provided, according to claim 1-4 or embossed from the upper surface side of the liquid-permeable surface sheet is provided between the central convex portion and both side protrusion An absorbent article is provided.

In the invention of claim 5 , an emboss from the upper surface side of the liquid-permeable surface sheet is provided on the outer side in the width direction of the both-side convex portions, or the liquid-permeable surface sheet on the outer side in the width direction of the both-side convex portions. The embossing from the upper surface side is provided, and the embossing from the upper surface side of the liquid-permeable surface sheet is provided between the central convex portion and the both side convex portions, so that the flexibility at the embossed portion is improved. It becomes high and it becomes easy to raise each convex part of the rear part side more.

As the present invention according to claim 6 , an adhesive layer is formed on the outer surface of the back sheet,
The absorbent article according to any one of claims 1 to 5 , wherein the anti-slip adhesive layer is not formed in a region corresponding to a region where the central convex portion and the both side convex portions are disposed.

In the invention of claim 6 above, by not forming an anti-displacement adhesive layer in the area corresponding to the arrangement area of the central convex part and the convex parts on both sides, the central convex part is not affected by the misalignment of shorts. The portion and the convex portions on both sides are appropriately deformed to easily fit into the groove of the collar portion.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article that can easily follow the change in the groove shape of the buttock associated with the movement of the buttock and prevents leakage to the rear side.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view. It is the III-III arrow directional view of FIG. FIG. 6 is a cross-sectional view showing a deformed state of the absorbent body 4. FIG. 6 is a cross-sectional view showing the dimensions of the absorber 4. It is a cross-sectional view of the absorber 4 which shows another form (the 1). It is a cross-sectional view of the absorber 4 which shows another form (the 2). It is the III-III arrow directional view of FIG. 1 which shows another form (the 3). It is a top view of the sanitary napkin 1 which shows another form (the 4). 2 is a back view of the sanitary napkin 1. FIG. It is a top view of the sanitary napkin 1 which shows another form (the 5). It is a top view of the sanitary napkin 1 which shows another form (the 6).

  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 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a liquid-permeable surface sheet 3 that allows permeation of menstrual blood, cages, and the like, and an intervening sheet between the sheets 2 and 3. Absorbent body 4 made of cotton-like pulp or synthetic pulp, etc., crepe paper 5 surrounding the absorbent body 4 for maintaining the shape of the absorbent body 4 and improving diffusibility, and substantially side edges of the absorbent body 4 From the side nonwoven fabric 7 that forms a pair of left and right three-dimensional gathers BS, BS provided with a portion as an upright proximal end and protruding at the surface side in a predetermined section in the front-rear direction so as to include at least the blood drainage port H The outer periphery of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is mainly composed of an adhesive such as hot melt or heat-sealed at the upper and lower end edges around the absorber 4. Bonding etc. The liquid-impervious back sheet 2 and the side nonwoven fabric 7 which are joined by steps and extend laterally from the absorbent body 4 at both side edges thereof are bonded by an adhesive such as hot melt or heat seal. Wings-like flaps W and W that are joined by the means and project laterally by the laminated sheet portion of the liquid-impervious backsheet 2 and the side nonwoven fabric 7 are formed, and the portion located on the heel side from this the second wing-shaped flaps _W B, is _{W B} are formed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious back sheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used 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. The non-use surface side (outer surface) of the liquid-impermeable back sheet 2 is formed with an anti-slip adhesive layer, which will be described in detail later, so that the sanitary napkin 1 is fixed to the underwear when worn on the body. Yes. 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. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of pores are formed in the liquid-permeable surface sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluids) are quickly absorbed, and are excellent in dry touch properties. It will be a thing.

  The absorbent body 4 is not particularly limited as long as it can absorb and retain bodily fluids. Usually, a fluffy pulp mixed with a water-absorbing polymer powder is preferably used from the viewpoint of the absorption function and cost. 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. Moreover, as the absorbent body 4, an aggregate of crimped fibers in which a water-absorbing polymer is dispersedly arranged can be used. Furthermore, a thin sheet-like absorber may be used as the absorber 4. When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like.

  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 other hand, the width dimension of the liquid-permeable surface sheet 3 is slightly longer than the width of the absorbent body 4 and covers the absorbent body 4 as shown in the cross-sectional views of FIGS. The purpose of the three-dimensional gather BS is to prevent the penetration of a side nonwoven fabric 7 different from the liquid-permeable surface sheet 3, specifically menstrual blood or a cage, or to increase the feeling of touch. Depending on the case, it is configured using a non-woven fabric material subjected to appropriate water repellent treatment or hydrophilic treatment. 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. to reliably prevent the passage 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 has an outer portion from the inner side of the width direction intermediate portion to slightly beyond the absorber side edge to the outer edge of the liquid-impermeable back sheet 2. A pair of left and right wings are bonded to the absorbent body side portion substantially corresponding to the body fluid discharge portion by the laminated sheet portion of the side nonwoven fabric 7 and the liquid-impervious back sheet 2. flaps W, to form a W, a second wing-shaped flaps W _B now to the buttocks side _position, to form a W _B. These wing-shaped flaps W, W and second wing-shaped flaps W _B, W, respectively on the outer surface side adhesive layer 12 of the _B ..., 13 ... comprises a, when worn for shorts, the wing-shaped flaps W, W are folded line It is folded back to the opposite side at the RL position and wrapped around the crotch portion of the shorts to be fastened.

  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 14 and a plurality of thread-like elastic stretch members 15 are disposed on the upper portion of the thread-like elastic stretch member 14 in a state where both ends or appropriate positions in the longitudinal direction are fixed. As shown in FIG. 2, the double sheet portion is folded and laminated in a Z-shaped cross section at the front and rear end portions, and is bonded to the absorbent body 4 side. As the bending points, three-dimensional gathers BS and BS standing on the surface side are formed while forming pockets P and P having openings inward in a cross-sectional shape.

[Structure of absorber 4]
The absorbent body 4 includes an absorbent body 4A formed from the front side to the rear side of the sanitary napkin 1 and a rear side of the absorbent body 4A on the skin contact surface side along the longitudinal direction at the center in the width direction. The center convex part 20 which protrudes is provided, and the both side convex parts 21 and 21 which protrude in the skin contact surface side along the longitudinal direction are spaced apart from the both sides, respectively. It is preferable that the convex part which protrudes along the longitudinal direction which consists of the said center convex part 20 and the both-side convex part 21 is provided in the odd number or more of 3 or more as a whole. In other words, in the illustrated example, one side of each of the two convex portions 21 and 21 is provided on both sides of the central convex portion 20 to form three convex portions as a whole. By providing the both side convex portions 21..., The overall convex portion can be an odd number of five or more.

  By providing the central convex portion 20 and the convex portions 21 and 21 on both sides, as shown in FIG. 4 (A), the width of the groove of the buttocks is wide and deep when worn, such as when turning over or walking. When it becomes shallow (when the groove of the buttocks is opened), these convex parts 20 and 21 fit into the groove of the buttocks of the open state as it is, and as shown in FIG. When the width of the groin groove is narrow and deep (when the groin groove is closed) when worn, such as when lying on its back, it goes inward from both sides in the width direction from the thigh and buttock By deforming the rear side of the absorbent body 4 so as to rise to the skin contact surface side when pressure is applied, the central convex portion 20 is set as the apex so that both convex portions 21 and 21 are connected to both sides thereof. Grooves in the buttocks that are closed and deformed into a sharp mountain shape as a whole and closed It will be able to fit to the back. Here, since the central convex portion 20 and the both side convex portions 21 are provided apart from each other, the degree of freedom of deformation of the both side convex portions 21 is high and the groove of the collar portion is open (the state shown in FIG. 4A). ) May be deformed so that the front ends of the convex portions 21 on both sides are inclined toward the central convex portion 20 side, and the shallow groove of the buttock is easier to fit, while the groove of the buttock is closed (FIG. 4 ( In the state B), the central convex portion 20 is formed at a position where the top portion of the convex portions 21 on both sides is lowered by the distance from the central convex portion 20 by being deformed so that the central portion in the width direction of the absorbent body 4A is bent. Since it is arranged so as to be connected to the side, it becomes easy to adapt to the acute-angled groove shape of the collar portion. Therefore, it is easy to follow the change in the groove shape of the collar portion accompanying the movement of the collar portion, and it is possible to reliably prevent transmission leakage to the rear side.

  The sanitary napkin 1 is preferably provided with a thin-walled portion 22 in which the surface on the underwear contact surface side is recessed along the longitudinal direction at the center in the width direction. The thin-walled portion 22 is provided over at least the length of the napkin longitudinal direction in which the central convex portion 20 and the both-side convex portions 21 are formed, and the central convex portion 20 is longer than the both-side convex portions 21 as illustrated. When formed, it is provided over the longitudinal length of the central convex portion 20. By providing the thin portion 22, when the leg pressure is applied from both sides in the width direction, the central portion in the width direction of the absorbent body 4A is surely raised on the skin contact surface side.

  On the other hand, at the front region including at least the portion corresponding to the blood drainage port H of the wearer, there is a front middle and high portion 23 that is spaced apart from the central convex portion 20 and the both convex portions 21 and protrudes toward the skin contact surface side. Is provided. In addition, the rear end of the absorber body 4A is continuous with the rear end of the central convex portion 20 and has an outer shape that expands from the rear end to both sides and protrudes toward the skin contact surface side. A mid-high portion 24 is provided.

  The dimensions of each part with respect to the cross section on the rear side provided with the central convex part 20 and the both convex parts 21 are as shown in FIG. 5 when the width of the groove of the collar is wide (when the groove of the collar is open). In consideration of the groove shape of the flange portion, it is preferable that the width a between the both outer sides of the convex portions 21 and 21 is about 50 mm. The width b of each convex part 20, 21 is preferably 5 to 15 mm, the raised height c is preferably 5 to 10 mm, and the distance d between adjacent convex parts is preferably 2 to 10 mm. On the other hand, the width e of the thin portion 22 is preferably 5 to 50 mm, and the minimum absorber thickness f of the thin portion is preferably 2 to 10 mm.

  The central convex portion 20 and the both side convex portions 21 may be formed with the same raised height c, but the raised height of the central convex portion 20 is preferably formed higher than the raised height of the both side convex portions 21. Thereby, the center convex part 20 of the center part in the width direction comes to rise highest, and as a whole, it rises in a mountain shape and easily fits into the groove of the buttock. The difference in height between the central convex portion 20 and the both side convex portions 21 is preferably about 1 to 5 mm.

  The thin-walled portion 22 causes deformation such that the central portion in the width direction of the absorbent body 4 is raised on the skin contact surface side. Therefore, as shown in FIG. It is preferable to have a cross-sectional shape in which a central portion such as a triangle is formed so that the thickness of the absorber is the thinnest at the central portion in the width direction so that a flexible shaft is formed along the center. However, when the width e of the thin portion 22 is formed to be narrower than the width b of the central convex portion 20, the thin portion 22 is deformed so that the entire thin portion 22 becomes a flexible portion. It is possible to form.

  In the above embodiment, the central convex portion 20 and the both side convex portions 21 are illustrated so as to be stacked integrally with the absorbent body 4A, but as shown in FIG. The central convex part 20 and the both-side convex parts 21 and 21 piled up separately can be arrange | positioned on the contact surface side.

  Furthermore, when comprised separately in this way, the compression part 25 which compressed the absorber fiber along the longitudinal direction with respect to the arrangement | positioning surface of the center convex part 20 of the absorber main body 4A and the both-side convex parts 21 and 21, respectively. 25... Can be provided. By providing such a compression portion 25, the rigidity of the absorber body 4A at the portion where the central convex portion 20 and the both side convex portions 21 and 21 are disposed can be increased, so that the absorber body 4A can be prevented from being twisted. become. Moreover, since the fiber density of the compression part 25 increases, the liquid diffusibility of the napkin longitudinal direction along this compression part 25 improves, for example, the amount of bodily fluid exceeding the absorption limit of the napkin width direction or thickness direction becomes an absorber. Even if absorbed, no leakage will occur. Here, the compression portion 25 is preferably formed with a width narrower than the arrangement width of the central convex portion 20 or the both side convex portions 21. Thereby, the displacement of each convex part can be prevented by the entanglement of the fibers only by arranging the central convex part 20 and the both side convex parts 21 on the upper surface of the absorbent body 4A on which the compression parts 25 are formed. That is, each absorber (absorber body 4A, central convex part 20, both convex parts 21) is individually creped in order to prevent deviation between the absorbent body 4A and the upper central convex part 20 and both convex parts 21. Rather than enclosing with paper, at least the crepe paper is not provided on the connection surface between the absorbent body 4A, the central convex portion 20 and the convex portions 21 on both sides, and the fibers of the absorbent bodies are entangled with each other or the lower layer is absorbed. The absorbent body 4A, the central convex portion 20, and the both side convex portions are arranged by placing a nonwoven fabric with fibers on the surface between the body main body 4A and the upper central convex portion 20 and both convex portions 21 instead of crepe paper. Each of the 21 fibers is intertwined with the nonwoven fibers.

  When the absorber main body 4A, the central convex portion 20, and the both side convex portions 21 are configured separately, as shown in FIG. 7 (A), at the positions where the convex portions 20, 21 of the absorber main body 4A are arranged. On the other hand, you may form the recessed parts 26 and 26 ... which each convex part fits. Thereby, the shift | offset | difference with 4 A of absorber bodies, the center convex part 20, and the both-side convex part 21 can be prevented now reliably.

  Further, as shown in FIG. 7 (B), the central convex portion 20 ′ and the both side convex portions 21 ′ can be configured by including crimped fibers, respectively. By including the crimped fiber, the restoring property of the central convex portion 20 ′ and the both side convex portions 21 ′ is improved, and it becomes easy to follow the change in the groove shape of the collar portion. In addition to including crimped fibers, it is also possible to include foam materials such as flexible urethane foam and melamine foam, and various sponge materials such as polyurethane sponge and PVA sponge.

  By the way, as shown in FIG. 1 and FIG. 3, in a state where the liquid-permeable surface sheet 3 is disposed on the upper surface of the absorbent body 4, both side convex portions 21 are formed from the upper surface side of the liquid-permeable surface sheet 3. Embosses 30 and 30 are respectively provided on the outer side in the width direction of 21. By this embossing 30, the entire convex portion on the rear side of the napkin is clearly defined, and it can be clearly seen from the outside that the convex portion is formed. Furthermore, as shown in FIG. 8, in addition to the embosses 30 and 30 on the outer side in the width direction described above, embosses 31 and 31 are provided between the center convex portion 20 and the both side convex portions 21, respectively. The sections 20 and 21 can be individually defined. Thereby, the bendability at the embossed portions 30 and 31 is increased, and the convex portions 20 and 21 on the rear side are more likely to rise.

  Further, as shown in FIG. 1, on the front side of the sanitary napkin 1, from the upper surface side of the liquid-permeable surface sheet 3 with respect to the longitudinal center line CL so as to surround both sides and the front side of the front middle-high portion 23. A symmetrical emboss 32 is provided. Further, two embossments 33 and 33 are formed at the rear end portion of the sanitary napkin 1 in a curved shape that bulges from the upper surface side of the liquid-permeable surface sheet 3 to the rear side substantially along the width direction. Yes.

  The embosses 30 and 30 formed on the outer sides of the convex portions 21 and 21 on both sides are not only the continuous linear shape shown in FIG. 1 but also from the inner side in the width direction as shown in FIG. A plurality of emboss lines that are inclined forward or rearward in the width direction outside (inclined to the front side in the illustrated example) are arranged apart from each other in the longitudinal direction of the napkin, and are formed symmetrically with respect to the longitudinal center line CL. It may be a planar shape, or may be an intermittent dotted line shape as shown in FIG.

  Further, as shown in FIG. 9 (A), the emboss 33 formed at the rear end may be formed in a trapezoidal shape or a triangular shape that bulges to the rear side. As shown in FIG. Furthermore, the emboss 32 formed on the front side and the emboss 30 formed on the rear side may be separated as shown in FIG. 1, or the longitudinal center line as shown in FIG. 9B. You may form so that it may each follow on both sides of CL.

  As shown in FIG. 10, the main body displacement preventing adhesive layer formed on the outer surface side of the liquid-impervious back sheet 2 of the main body portion where the absorbent body 4 is interposed is the central convex portion 20 and both convex portions 21, It is preferable not to form in the area | region corresponding to the arrangement | positioning area | region of 21. FIG. Thereby, it becomes easy to fit in the groove | channel of a buttocks, without being influenced by the twist etc. of shorts. As shown in FIG. 10 (A), the pattern of the anti-displacement adhesive layer formed in this way is a left and right continuous from the front side to the rear side along the longitudinal direction at positions corresponding to both sides of the absorbent body 4. A pair of body misalignment-preventing adhesive layers 16a, 16a are formed, or as shown in FIG. 10B, a pair of left and right body misalignments along the longitudinal direction at positions corresponding to both sides on the front side of the absorber 4. In addition to forming the adhesive layers 16b and 16b, the main body misalignment adhesive layer 16c that extends along the width direction is formed at a position corresponding to the center in the width direction of the rear end of the absorber 4, As shown in (C), the main body misalignment-preventing adhesive layer 16d is formed at a position corresponding to the center in the width direction on the front side of the absorbent body 4, and it corresponds to both sides in the width direction at the rear end of the absorbent body 4. A pair of left and right body misalignment stops along the longitudinal direction It is possible to form an adhesive layer 16e.

[Other examples]
(1) In the above-described embodiment, the front middle high portion 23 and the rear central convex portion 20 and the both side convex portions 21 are provided apart from each other. However, as shown in FIG. The middle and high portions 23 may be provided continuously. Thereby, it becomes easy to fit also into the clearance gap between the area | region corresponding to the blood drainage port part H, and a buttocks. Moreover, you may make it the both convex parts 21 and 21 follow the front middle high part 23. FIG.
(2) In the above-described embodiment, the rear middle high portion 24 is formed continuously to the rear end portion of the central convex portion 20, but as shown in FIG. You may make it provide the back middle high part 24. FIG. In the first place, the rear middle high portion 24 is provided to prevent rear leakage when the central convex portion 20 and the both side convex portions 21 do not fit well in the groove of the buttock, so that the sanitary napkin according to the present invention is provided. 1, as long as the central convex portion 20 and the both convex portions 21 fit into the groove of the collar portion to prevent rear leakage, the rear middle / high portion 24 may be provided apart from the rear side position as shown in the figure. However, it is not necessary.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impermeable back sheet, 3 ... Liquid permeable surface sheet, 4 ... Absorber, 4A ... Absorber main body, 5 ... Crepe paper, 7 ... Side nonwoven fabric, 16a-16e ... Main body deviation Stop adhesive layer, 20 ... Central convex part, 21 ... Both side convex part, 22 ... Thin part, 23 ... Front middle high part, 24 ... Back middle high part, 30 * 31 * 32 * 33 ... Emboss

Claims (6)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
The absorbent body has an absorbent body formed from the front side to the rear side of the absorbent article, a rear side of the absorbent body and a portion corresponding to the groove of the buttock, and a longitudinally central portion in the width direction. A central convex portion that protrudes toward the skin contact surface side from the upper surface of the absorbent main body, and spaced apart in the width direction of the absorbent article on both sides thereof from the upper surface of the absorbent main body along the longitudinal direction. The absorbent article is characterized in that it has both convex portions protruding on the skin contact surface side, and the central convex portion is formed to have a higher protruding height than the both convex portions . The absorbent body has an underwear contact surface along the longitudinal direction in the widthwise central portion of the absorbent article over at least the longitudinal length of the absorbent article in which the central convex portion and the both side convex portions are formed. The absorptive article according to claim 1 provided with the thin part which dented the side field. The absorber is configured by disposing the separate central convex portion and both convex portions on the skin contact surface side of the absorbent main body, and the central convex portion and both convex portions on the absorbent body. The absorbent article according to claim 1 , wherein a compression portion of the absorbent fiber is provided along the longitudinal direction of each of the arrangement surfaces. The absorbent article according to any one of claims 1 to 3, wherein the center convex part and the both side convex parts include crimped fibers. Or embossing is provided from the upper surface side of the liquid permeable topsheet to the widthwise outer side of the two side projecting portions, embossed from the upper surface side of the liquid-permeable surface sheet is provided outside in the width direction of the two side projecting portions And the embossing from the upper surface side of the said liquid-permeable surface sheet is provided between the said center convex part and both-side convex part, The absorbent article in any one of Claims 1-4 . The displacement preventing pressure-sensitive adhesive layer on the outer surface of the backsheet is formed, the displacement preventing pressure-sensitive adhesive layer, the central convex portion and the claims 1-5 which is not formed in a region corresponding to the arrangement region of each side projecting portion The absorbent article in any one.

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