JP2012157459A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article with improved fit, wherein an absorber conforms easily to the shape of the body.SOLUTION: In the absorbent 4, the thickness of the absorber in a gluteal cleft-facing region 25 which comprises a part that faces the gluteal cleft and is posterior to the blood-discharging orifice-facing region 23 comprising a part that faces the blood-discharging orifice, is formed thinner than that in the blood-discharging orifice-facing region 23 and a first compressed groove 26 is provided on an unused surface of the gluteal cleft-facing region 25 and in the center of the transverse direction of the feminine napkin 1 along the longitudinal direction. Since the thickness of the absorber in the gluteal cleft-facing region 25 is formed thinner than that in the blood-discharging orifice-facing region 23, a front medium height part 21 protruding on a skin contact surface side is provided to the blood-discharging orifice-facing region 23 but not formed in the gluteal cleft-facing region 25.

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads and the like for absorbing menstrual blood and vaginal discharge, etc., and is easy to deform along the shape of the body and absorbs with improved fit It relates to goods.

  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 top 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 to this type of absorbent article, and various means for adapting to the shape of the body have been taken. For example, in Patent Document 1 below, as an absorbent body, the crotch region including a body fluid discharge site has a first middle-high portion formed with a thicker absorbent body than the surroundings, and the body fluid drainage is on the first middle-high portion. An absorptive article having a second middle and high part in which the absorber thickness is formed thicker than the first middle and high part in the perineum part corresponding part behind the part is disclosed.

  Moreover, in the said patent document 2, as the absorber, the front middle height which protrudes in the skin contact surface side in the front part and back part of an absorbent article which is narrower than this absorber, and protrudes in the skin contact surface side. And the front middle high part is formed in the excretion part region that is in contact with the body fluid excretion part of the wearer, and absorbs between the front middle high part and the rear middle high part. An absorbent article is disclosed in which an intermediate groove is formed that extends in the width direction of the article and is formed in a convex shape toward the rear middle-high part.

JP 2008-6203 A JP 2010-131297 A

  The absorptive article of the above-mentioned patent documents 1 and 2 is made to fit well from the blood drainage mouth part to the perineum part, the groin groove by increasing the thickness of the absorber according to the concave shape of the body. .

  Certainly, in the blood drainage port part, the fit can be improved by forming the middle and high parts of the absorber, but the depth of the concave shape is too deep in the perineum and groin grooves behind it, so It was difficult to get all the way in. Although it is conceivable to raise the middle and high parts so as to penetrate deeply, there are individual differences in the depth of the concave shape of the body, and depending on the person, the fit may be impaired. For this reason, in order to fit well to the perineum part and the groin groove, it is preferable to have a structure in which the absorbent body is deformed along the shape of the body, but in the absorbent article described in Patent Documents 1 and 2, Since the middle and high parts of the absorber are formed in these portions, the absorber is hardly deformed.

  Then, the main subject of this invention is providing the absorbent article which the absorber was easy to deform | transform along the shape of a body and improved fit property.

In order to solve the above-mentioned problem, in the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet as the present invention according to claim 1,
The absorber is formed such that the absorber thickness of the buttock groove corresponding region including the portion corresponding to the buttock groove is thinner than the absorber thickness of the blood discharge port corresponding region including the portion corresponding to the blood discharge port portion, and the buttock There is provided an absorbent article characterized in that a first compressed groove is provided along the longitudinal direction at the center in the width direction of the absorbent article on the non-use surface side of the groove corresponding region.

  In the first aspect of the present invention, the absorber thickness of the buttock groove corresponding region including the portion corresponding to the wearer's buttock groove as the absorber, and the blood drainage port including the portion corresponding to the wearer's blood discharge port portion It is formed relatively thinner than the absorber thickness of the corresponding region, and is provided on the non-use surface side of the buttock groove corresponding region, and a first compressed groove is provided along the longitudinal direction at the center in the width direction of the absorbent article. In particular, in the region corresponding to the buttock groove, the widthwise central portion of the absorbent body is bent so as to rise to the use surface side in the region corresponding to the buttock groove. This makes it easier to deform and improves fit.

  As the present invention according to claim 2, the absorbent body has a front middle and high portion that protrudes toward the skin contact surface side in the blood drainage port corresponding region, and does not have a middle and high portion in the buttocks groove corresponding region. Thus, the absorbent article according to claim 1, wherein the absorbent body thickness in the buttock groove corresponding region is formed thinner than the absorbent body thickness in the blood drainage port corresponding region.

  In the invention according to the second aspect, the thickness of the absorber in the buttock groove-corresponding region is reduced by having the front middle-high portion in the blood drainage outlet-corresponding region and not having the middle-high portion of the absorber in the buttock groove-corresponding region. It is formed thinner than the absorber thickness in the blood-mouth corresponding region.

As a third aspect of the present invention, a pair of left and right second squeezes from the skin contact surface side of the absorbent article along the substantially longitudinal direction of the absorbent article from the blood drainage outlet corresponding area to the buttock groove corresponding area Grooves are formed,
Each of the second compressed grooves has a width direction center line of the absorbent article in a perineum corresponding region that includes a portion corresponding to the perineum between the blood drainage port corresponding region and the buttock groove corresponding region. The absorptive article according to claim 1 or 2 in which the convex part projected towards is formed.

  In the invention according to claim 3, the pair of left and right second pressing grooves along the substantially longitudinal direction of the absorbent article from the skin contact surface side of the absorbent article from the blood drainage outlet corresponding area to the buttocks groove corresponding area. In the perineal region corresponding region including a portion corresponding to the perineal portion of the wearer between the blood drainage port corresponding region and the buttocks groove corresponding region in the pair of left and right second compressed grooves, By forming a convex part that protrudes toward the center line in the width direction of the absorbent article, when leg pressure is applied from both sides during wearing, the absorbent body between the convex parts on both sides is easily raised to the use surface side And the fit of the perineum is improved.

  As for this invention which concerns on Claim 4, the said front middle high part is formed in the shape from which a rear-end part becomes narrow gradually toward the width direction center part of the said back of an absorbent article. An absorbent article as described in 1 above is provided.

  In the invention of claim 4, the rear end portion of the front middle and high portion is formed in the perineal portion of the wearer by forming the shape gradually narrowing toward the center portion in the width direction behind the absorbent article. It is easy to deform | transform along the body line extended toward the both sides of the front starting from the beginning part of the valley of the buttocks.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article in which the absorbent body is easily deformed along the shape of the body and has improved fit.

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. It is the IV-IV arrow directional view of FIG. It is sectional drawing of the absorber part which shows a use condition.

  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 top 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 Mainly from a pair of left and right three-dimensional gathers BS and BS side nonwoven fabric 7 which is provided to project from the surface side in a predetermined section in the front-rear direction so as to include at least a body fluid discharge part. The outer periphery of the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is formed at the upper and lower end edges of the absorbent body 4 around the absorbent body 4 such as an adhesive such as hot melt or heat seal. The liquid-impervious backsheet 2 and the side nonwoven fabric 7 that are joined by the adhesive means and extend laterally from the absorbent body 4 at both side edges thereof, such as an adhesive such as hot melt, heat seal, etc. Wing-like flaps W and W are formed by the laminated sheet portion formed by the liquid-impervious backsheet 2 and the side nonwoven fabric 7 and are formed on the heel portion side. the second wing-shaped flaps W _B to _portions, W _B are formed.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious backsheet 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. One or a plurality of adhesive layers (not shown) are formed on the non-use side (outer surface) of the liquid-impermeable back sheet 2 so as to fix the sanitary napkin 1 to the underwear when worn on the body. It has become. As the liquid-impermeable back sheet 2, a polylaminated nonwoven fabric in which a plastic film and a nonwoven fabric are laminated may be used.

  Next, the liquid-permeable top sheet 3 is preferably a porous or non-porous nonwoven fabric or a porous plastic sheet. 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 through holes are formed in the liquid permeable top sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluid) are quickly absorbed, and the dry touch property is excellent. 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 absorbent body 4 is preferably surrounded by crepe paper 5 to maintain its shape.

On the other hand, the width dimension of the liquid-permeable top 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 gathered BS is to prevent the permeation of menstrual blood, or the like from the side non-woven fabric 7 different from the liquid-permeable top sheet 3, specifically 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 to 4, the side nonwoven fabric 7 extends from the inner side position of the absorbent body 4 to the outer edge of the liquid-impervious backsheet 2 slightly beyond the absorbent body side edge from the widthwise intermediate portion. 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. 4, 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, as shown in FIG. 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 a base body absorbent body 20 disposed substantially from the front side to the rear side of the sanitary napkin 1, and a blood drainage port corresponding region 23 including at least a portion corresponding to the blood drainage port portion H of the wearer. Disposed at the front middle / high portion 21 that protrudes toward the skin contact surface side from the base material absorbent body 20 and, if necessary, at the rear end of the sanitary napkin 1, the base body absorbent body It is desirable to be formed from the rear middle-high part 22 which protrudes from the skin 20 to the skin contact surface side. The front middle-high part 21 is formed in a size that sufficiently covers the blood drainage port H of the wearer and its periphery. The front middle high portion 21 may be formed only in the blood drainage outlet corresponding region 23, but it is preferable to form the rear side so as to extend to the perineum corresponding region 24 as will be described in detail later. . The rear middle-high part 22 is located behind the buttocks groove and captures body fluid that leaks to the rear side through the buttocks groove.

  As the base material absorbent body 20, any material that can absorb and retain body fluids may be used, but pulp fiber mixed with a water-absorbing polymer powder is preferably used from the viewpoint of absorption function and cost. The manufacturing method of the said absorber 20 for base materials can be made into an air through absorber and an airlaid absorber. In addition, chemical fibers may be mixed with tow fibers (fiber bundles) or piled pulp. Examples of the tow fiber include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, etc.). In particular, cellulose esters and cellulose are preferable. As the chemical fiber, for example, a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate or polybutylene terephthalate, a polyamide such as nylon, and a synthetic fiber such as a copolymer thereof can be used. Two types may be mixed. 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. Examples of the pulp fiber include chemical fibers obtained from wood, cellulose fibers such as molten 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.

  As the front middle-high portion 21 and the rear middle-high portion 22, functionally, the body fluid discharged to the upper surface of the liquid-permeable top sheet 3 is quickly absorbed, but the absorbed body fluid is not retained inside and absorbed for the base material. Where it is necessary to have a function of permeating into the body 20, a mixture of chemical fibers in pulp fibers, an air-through absorbent body, an airlaid absorbent body, or a tow fiber is preferably used in order to improve the permeability. Is done. By mixing chemical fibers in the front middle high part 21 and the rear middle high part 22, the bulk can be maintained and the cushioning property can be maintained without being deflated even when the body fluid is absorbed. In order to increase the bulkiness and improve the fit to the body, the front middle high portion 21 and the rear middle high portion 22 are preferably mixed with polyester fibers such as tow fibers (fiber bundles), polyethylene terephthalate, and polybutylene terephthalate.

  In addition, the said absorber 20 for base materials does not require that it contains a chemical fiber, It can be made into the mixture of a pulp fiber independent or a pulp fiber and a highly water absorbing resin. The base material absorbent body 20 is not considered to be permeable, and it is desirable to retain the body fluid that has permeated from the front middle-high portion 21 and the rear middle-high portion 22 so that it does not ooze out to the outside and contains chemical fibers. You can avoid it.

  It is preferable that the base material absorbent body 20, the front middle-high part 21 and the rear middle-high part 22 are integrally formed by stacking the absorbent body three-dimensionally. Moreover, it can also be set as the two-stage structure which piles the front middle high part 21 and the back middle high part 22 on the upper stage of the absorber 20 for base materials.

  As described above, the absorbent body 4 corresponds to the blood drainage mouth corresponding region 23 including a portion corresponding to the blood drainage mouth portion H of the wearer, and the hip groove corresponding to a portion corresponding to the wearer's hip groove on the rear side thereof. A region 25 and a perineum corresponding region 24 including a portion corresponding to the wearer's perineum between the blood drainage port corresponding region 23 and the buttock groove corresponding region 25.

  In the sanitary napkin 1, the sanitary napkin 1 has a substantially longitudinal direction from the skin contact surface side (the outer surface side of the liquid-permeable top sheet 3) of the sanitary napkin 1 from the blood drainage port corresponding region 23 to the buttock groove corresponding region 25. It is preferable that a pair of left and right second pressing grooves 27 is formed along the direction. The second squeezing groove 27 only needs to have a pair of left and right portions extending along the substantially longitudinal direction of the sanitary napkin 1 at least on both sides of the center line CL in the width direction. The front end portion and the rear end portion of this portion are connected to each other, and are formed in a shape that is elongated in the napkin longitudinal direction and closed in the circumferential direction as a whole. The second squeezing groove 27 is formed outside the front middle-high portion 21 in the blood drainage outlet corresponding region 23 and the perineum corresponding region 24, and is formed slightly narrower in the hip groove corresponding region 25. In addition, the blood drainage port H is formed with curved portions 29 and 29 that bulge out toward the center line CL in the width direction in order to easily identify the position at the time of wearing.

  In addition, a second squeezing groove 27a for the front end having a substantially Ω shape in plan view is formed apart from the second squeezing groove 27, and is separated from the second squeezing groove 27 to the rear side. A second squeezing groove 27b for the rear end is formed so as to surround the portion 22 in a substantially reverse Ω shape in plan view. The second squeezing groove 27a for the front end and the second squeezing groove 27b for the rear end surely absorb the body fluid transmitted to the front side and the rear side of the sanitary napkin 1 and prevent the body fluid from leaking. It is.

  In the sanitary napkin 1, various means described below are taken in order to make it easier to deform the absorbent body 4 along the shape of the body of the groin and perineum.

  First, the absorber 4 is formed so that the absorber thickness of the buttock groove corresponding region 25 is relatively thinner than the absorber thickness of the blood discharge port corresponding region 23. Thereby, the collar part corresponding | compatible area | region 25 of the absorber 4 (absorber 20 for base materials) is rich in a deformability, and becomes easy to deform | transform along the shape of a collar part groove | channel. In order to form in this way, it is desirable to provide the blood outlet corresponding region 23 with the front middle-high portion 21 while the buttocks groove corresponding region 25 does not have a middle-high portion of the absorber. As a result, in the blood drainage outlet corresponding region 23, the total thickness of the base material absorber 20 and the front middle and high part 21 is obtained, whereas in the buttocks groove corresponding region 25, only the base material absorber 20 has an absorber thickness. Thus, it is formed thinner than the absorber thickness in the blood drainage outlet corresponding region 23. The ratio of the absorber thickness in the blood drainage outlet corresponding region 23 to the absorber thickness in the buttocks corresponding region 25 should be about 3: 1, preferably about 2.7: 1.

  In addition, the absorber thickness of the blood drainage outlet corresponding | compatible area | region 23 means the thickness of the whole absorber including the thickness, when the front middle high part 21 is provided. Moreover, the absorber thickness of the buttock groove corresponding region 25 is a portion that is not affected by the squeezing by the first squeezing groove 26 and the second squeezing groove 27 described in detail later, and a pair of left and right second squeezing grooves 27. , 27 is the thickness of the base material absorbent body 20 between the portions.

  As another form in which the absorber thickness of the buttock groove corresponding region 25 is formed to be relatively thinner than the absorber thickness of the blood drainage port corresponding region 23, the front middle-high portion 21 is not provided, and the base material absorber 20 is provided. The absorber thickness in the buttock groove corresponding region 25 may be formed relatively thinner than the absorber thickness in the blood discharge port corresponding region 23. In this case, the absorber thickness of the buttock groove corresponding region 25 is formed so that at least the absorber thickness sandwiched between the second pressing grooves 27 and 27 is thinner than the absorber thickness of the blood discharge port corresponding region 23. To do.

  Secondly, in the sanitary napkin 1, the first compressed groove 26 is formed in the widthwise center portion of the sanitary napkin 1 along the longitudinal direction on the non-use surface side of the buttock groove corresponding region 25 of the absorbent body 4. Has been granted. By means of the first means and the second means, that is, the absorber thickness of the buttock groove corresponding region 25 is made thinner than the absorber thickness of the blood discharge port corresponding region 23 (first means), and the buttock groove corresponding region 25 is used. By providing the first pressing groove 26 on the non-use surface side (second means), as shown in FIG. 5, the first pressing groove 26 is used as a flexible shaft in the buttock groove corresponding region 25 as shown in FIG. The center part in the width direction of the absorbent body for material 20 is bent so as to rise to the use surface side, and fits well along the wearer's buttocks groove.

  The first compressed groove 26 is preferably applied from the non-skin contact surface side of the absorbent body 4 (base material absorbent body 20) or from the outer surface side of the crepe paper 5. The first pressing groove 26 is formed by passing between a pressing roll heated to a predetermined temperature and an anvil roll that receives the pressure. The temperature of the squeeze roll is preferably in the range of 50 to 200 ° C. When heat-fusible fibers are mixed in the absorbent body 4 and squeezed under heating, the heat-fusible fibers are heated by heat. It is possible to promote adhesion and stabilize the compressed shape.

  The first squeezing groove 26 is desirably formed in a linear continuous line shape as in the illustrated example, but may be formed in an intermittent dotted line shape. The length of the groove bottom portion of the first compressed groove 26 in the longitudinal direction of the napkin is preferably in the range of 30 mm to 200 mm, and the groove width is preferably 2 mm to 10 mm. Further, the depth of the groove is preferably 20% to 95% of the thickness of the base material absorbent body 20 in consideration of the flexibility of the base material absorbent body 20 and can be, for example, about 1 mm to 10 mm.

  Thirdly, it is preferable to form the perineal region convex portions 28 and 28 projecting toward the center line CL in the width direction of the sanitary napkin 1 in the perineal region corresponding region 24 in the second compressed groove 27. By providing the perineum convex portions 28, 28, the absorbent body between the perineal convex portions 28, 28 is directed toward the skin contact surface side by the compressive force from the inside of the leg when the sanitary napkin 1 is worn. It becomes easy to rise, and this raised part fits the perineum. The perineum convex portions 28 and 28 are arranged in consideration of the distance between the blood drainage port H and the perineal region of the wearer, and the blood drainage port H (approximately the center of the length of the wing-shaped flap W in the longitudinal direction of the napkin) Part) from the rear side to 40 mm to 60 mm, preferably about 50 mm.

  Fourthly, it is preferable that the front middle-high part 21 is formed in a shape that gradually becomes narrower toward the center in the width direction behind the sanitary napkin 1. This makes it easier for the absorbent body to be deformed along the body line extending from the beginning of the front of the groin groove formed in the perineum to the both sides ahead.

  The shape of the rear end portion of the front middle high portion 21 can be a V shape, a U shape, a trapezoidal shape, or the like that becomes narrower toward the rear side of the napkin. Moreover, a concave pressing groove (emboss) can be provided from the use surface side or the non-use surface side of the base material absorbent body 20 along the outline of the rear end portion.

  Moreover, the front middle high part 21 can be formed so that the absorber thickness of the rear side becomes gradually thinner toward the rear side of the sanitary napkin 1. Thereby, it comes to be excellent in fitting property from a perineum part to a buttocks groove.

  By the way, in order to secure the fit to the roundness in the front-rear direction of the buttock, the ridge-groove protrusions 30, 30 serving as folding base points in the width direction are formed at predetermined width-direction positions of the left and right second pressing grooves 27, 27, respectively. May be. In the illustrated example, the ridge groove convex portions 30 are formed one by one in the central portion of the heel groove corresponding region 25 in the longitudinal direction of the napkin, but can be formed at a plurality of locations. In the illustrated example, the sanitary napkin 1 is formed in a protruding shape toward the center line CL in the width direction, but may protrude toward the outside or both sides.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Liquid permeable top sheet, 4 ... Absorber, 5 ... Crepe paper, 7 ... Side nonwoven fabric, 20 ... Absorber for base material, 21 ... Front middle height Part, 22 ... rear middle and high part, 23 ... blood discharge port corresponding area, 24 ... perineum corresponding area, 25 ... buttocks corresponding area, 26 ... first pressing groove, 27 ... second pressing groove, 28 ... convex for perineum Part

Claims (4)

In an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The absorber is formed such that the absorber thickness of the buttock groove corresponding region including the portion corresponding to the buttock groove is thinner than the absorber thickness of the blood discharge port corresponding region including the portion corresponding to the blood discharge port portion, and the buttock An absorbent article, which is a non-use surface side of the groove-corresponding region, and is provided with a first compressed groove along the longitudinal direction at the center in the width direction of the absorbent article.   The absorbent body has a front middle-high portion that protrudes toward the skin contact surface side in the blood drainage-corresponding region, and the rib-groove corresponding region does not have a middle-high portion, thereby absorbing the hip-groove corresponding region. The absorbent article according to claim 1, wherein the body thickness is formed to be thinner than the absorber thickness in the blood drainage outlet corresponding region. A pair of left and right second squeezing grooves are formed along the substantially longitudinal direction of the absorbent article from the skin contact surface side of the absorbent article over the blood drainage outlet corresponding area to the buttocks groove corresponding area.
Each of the second compressed grooves has a width direction center line of the absorbent article in a perineum corresponding region that includes a portion corresponding to the perineum between the blood drainage port corresponding region and the buttock groove corresponding region. The absorptive article according to claim 1 or 2 in which the convex part which projects toward is formed.   The absorbent article according to any one of claims 2 and 3, wherein the front middle-high part is formed in a shape in which a rear end part gradually becomes narrower toward a center part in the width direction behind the absorbent article.

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