KR20170099972A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article capable of restraining leakage by fitting an absorbent core against the buttocks of a wearer. The absorbent article 1 has an excretory bag contact area S1 facing the excretion of the wearer and a rear area S2 located behind the excretory port contact area S1 and an excretory port contact area S1 and a backward area S2 ) Of the absorbent core (31). The absorbent core 31 of the back side region S2 is provided with front and rear slits 42 which are disposed at the center of the width direction W of the absorbent core 31 and extend in the front and back direction L of the absorbent article 1, Auxiliary slits 43 which are continuous to the front and rear slits 42 and extend outward in the width direction W from the front and rear slits 42 are formed. The outer edge 43E of the auxiliary slit 43 is positioned inside the width direction W of the outer edge 31E of the absorbent core 31 of the rear region S2.

Description

Absorbent article

The present invention relates to an absorbent article such as sanitary napkin.

Patent Document 1 discloses an absorbent article having a middle portion raised to the side of the skin contact surface and a leakage preventing groove provided on both outer sides of the middle portion in the width direction and in which the surface sheet and the absorbent body are pressed. The excretory contact area of the absorbent article is sandwiched by the wearer's legs in a worn state, and a force directed inward in the width direction is applied. When the force directed toward the inside in the width direction is applied to the absorbent article of Patent Document 1, the leakage preventing groove is bent and bent toward the skin side under the crotch of the wearer, whereby the used portion of the absorbent body is raised (see paragraph 0016 of patent document 1).

Patent Document 1: JP-A-2012-239722

However, the above-described absorbent article has the following problems.

The cross-sectional shape of the body along the width direction in the vicinity of the buttocks of the wearer is a shape in which the right and left buttocks are bulging and the spaces between the buttocks are recessed. Since the middle portion of Patent Document 1 extends rearward from the excretion hole contact region, when the absorber in the excretion port contact region rises, the absorber in the rear region also rises. Since the used portion of the rear region of Patent Document 1 is configured to have a high unit weight, the thickness of the protrusion when raised to the wearer becomes thick, and it is difficult to arrange along the concave portion of the buttocks of the body. As a result, a clearance is formed between the buttocks of the wearer and the absorbent article, and leakage sometimes occurs.

Further, the cross-sectional shape of the body along the anteroposterior direction of the wearer has a rounded shape extending from the excretion accessory area to the back. If the absorbent core of the rear region is not disposed along the rounding of the body, back leakage sometimes occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an absorbent article capable of restraining leakage by fitting an absorbent core to the buttocks of a wearer.

In order to solve the above problems, the absorbent article (the absorbent article 1) according to the present disclosure has an excretory bag contact area (excretion port contact area S1) facing the excretion of the wearer and a posterior And an absorbent core (absorbent core (31)) disposed in the excretory contact area and the rear area, wherein the absorbent core of the absorbent core is provided with an absorbent core (Front and rear slits 42) extending in the front-rear direction of the absorbent article and disposed in the center in the width direction, and auxiliary slits continuous to the front and rear slits and extending outward in the width direction from the front and rear slits The outer edge 43E of the auxiliary slit is formed so as to be wider than the outer edge 31E of the absorbent core of the rear region And it is located inside the incense.

The absorbent article (absorbent article 1) according to the present disclosure has an excretion opening contact area (excretion opening contact area S1) opposite to the excretion opening of the wearer and a backward area And an absorbent core (an absorbent core (31)) disposed in the excretory bag contact area and the rear region, wherein the absorbent core of the rear region is provided with an absorbent core (Front and rear slits 42) configured to be bent in a convex shape toward the wearer's side and a second curved portion (front and rear slit 42) constituting a starting point of the absorbent core of the rear region bent in the thickness direction and extending in the width direction (The outer edge 43E) of the second curved portion is located inside the widthwise direction of the outer edge (outer edge 31E) of the absorbent core Is that as a base.

1 is a plan view of an absorbent article according to an embodiment.
Fig. 2 is a rear view of the absorbent article shown in Fig. 1. Fig.
3 is a schematic sectional view of the AA cross section shown in Fig.
Fig. 4 (a) and Fig. 4 (b) are cross-sectional views of the absorbent article 1 shown in Fig. 1 mounted on a wearer.
Fig. 5 is a sectional view of the absorbent article 1 shown in Fig. 1 mounted on the wearer.

(1) Overall structure of the absorbent article

1 to 3, the overall structure of the absorbent article 1 according to the embodiment will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic, and the ratios of the dimensions and the like are different from those of the real world. Therefore, specific dimensions and the like should be judged based on the following description. The drawings may also include portions having different dimensional relationships or ratios with each other.

Fig. 1 is a plan view of the absorbent article, and Fig. 2 is a rear view of the absorbent article. 3 is a cross-sectional view taken along the line A-A shown in Fig. The absorbent article 1 according to the present embodiment is a sanitary napkin for night use.

The absorbent article 1 has a front and back direction L extending to the front side (back side) and back side (back side) of the wearer, a width direction W orthogonal to the back and forth direction L, And a thickness direction T extending to the skin non-opposing face side T2.

The absorbent article includes an excretory port contact area S1 disposed at the excretion port contact area of the wearer and a rear area S2 located at the rear side of the excretion port contact area S1 and a front area S2 located forward of the excretion port contact area S1 Area S3. The length of the back side region S2 in the forward and backward direction L is longer than the length of the excretory port contact region S1 in the back and forth direction L. [ The excretory bag contact area S1 is a region mounted on the undergarment of the undergarment in a state of being mounted on the undergarment. A wing to be described later is disposed in the excretory bag contact area S1. The boundary between the excretory bag contact area S1 and the rear area S2 is the width slit 41 described later. The front edge of the width slit 41 is the rear edge of the excretion mouth contact area S1 and the rear edge of the width slit 41 is the front edge of the rear area S2. The rear edge of the rear region S2 is the rear edge of the absorbent article 1. The boundary between the excretory bag contact area S1 and the front area S3 is the front edge of the wing 3. The front end edge of the wing 3 is a dead portion to which the wing 3 is attached and is a portion located on the front side among the portions recessed most inward in the width direction in the wing 3. The dead part on the front side of the wing 3 is the front edge of the excretion mouth contact area S1 and the rear edge of the front area S3. The front edge of the front region S3 is the front edge of the absorbent article 1. Fig. 3 shows the front-rear direction ranges of the excretion-mouth contact area S1, the rear-side area S2 and the front-side area S3.

The absorbent article 1 includes an absorbent body 30, a skin face sheet 10 positioned on the skin facing side T1 of the absorbent body 30 and a skin sheet 10 positioned on the skin non-facing side T2 than the absorbent body 30. [ And a cotton sheet 20 is provided. The skin surface sheet 10 includes a liquid-permeable top sheet 11 covering at least the center in the width direction of the absorbent body 30 and an outer edge (outer edge in the width direction) of the top sheet 11, And a side sheet 12 extending outward. The non-skin cotton sheet 20 is a liquid-pervious sheet.

The topsheet 11 is a liquid-permeable sheet that transmits a liquid such as body fluids. The topsheet 11 covers at least the surface of the absorber 30. The topsheet 11 is not particularly limited as long as it is a sheet-like material such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, a mesh sheet, or the like. As the material of the woven fabric or the nonwoven fabric, any of natural fiber and chemical fiber can be used.

The side sheet 12 can be selected from the same material as the topsheet 11. However, in order to prevent the menstrual discharge from flowing beyond the side sheet 12 to the outside of the absorbent article 1, the side sheet 12 preferably has hydrophobic or water repellent properties. The side sheet 12 is disposed on the outer edge of the absorbent body 30, the wing 3 and the hip flap 4. [

The non-skin cotton sheet 20 has a length approximately equal to the length of the skin cotton sheet 10. As the non-skin facing sheet 20, a laminated non-woven fabric mainly made of a polyethylene sheet, polypropylene, etc., a breathable resin film, a sheet obtained by bonding a breathable resin film to a nonwoven fabric such as a spunbond or spun lace, or the like can be used.

The absorbent body 30 has an absorbent core 31 in which an absorbent material is laminated and a core wrap 32 covering the absorbent core 31. [ The absorbent material may, for example, be hydrophilic fibers, pulp and SAP. The rear end edge of the absorbent core 31 and the rear end edge of the core wrap 32 substantially coincide with each other in the absorbent body 30 of the present embodiment.

The absorbent core 31 is disposed in the excretory bag contact area S1 and the rear area S2. The absorbent core 31 may be placed in a state of being divided in the excretory bag contact area S1 and the rear area S2 or may be disposed across the excretory bag contact area S1 and the rear area S2 . The absorbent core 31 may be disposed at least in the discharging port contact area S1 and the rear side area S2 and may be disposed in the discharging port contact area S1, the rear side area S2 and the front side area S3 good.

The absorbent core 31 has a used portion 33 located inside the widthwise direction of the outer edge 31E of the absorbent core 31. The used part 33 is located in the excretion mouth contact area S1 and is located inward in the width direction than the outer edge 31E of the absorbent core 31 in the excretion port contact area S1. The thickness of the used portion 33 is thicker than the thickness of the outer edge 31E of the absorbent core 31 in the excretion mouth contact area S1. The unit weight of the absorbent material of the used portion 33 is higher than the unit weight of the absorbent material of the outer edge 31E of the absorbent core 31 in the excretion mouth contact area S1. The used portion 33 is located on the rear side in the excretion mouth contact area S1 and is adjacent to the width slit 41. [ A compressed portion 80 in which the absorber 30 and the skin surface sheet 10 are compressed in the thickness direction is formed on the outer edge of the middle portion 33 of the middle portion of this embodiment.

The absorbent core 31 has the width slit 41, the front and rear slits 42, and the auxiliary slit 43. The absorbent core 31 is configured such that the absorbent core 31 can be bent in the thickness direction T of the width slit 41, the front and rear slits 42 and the auxiliary slit 43.

The unit weight of the absorbing material of the width slit 41, the front and rear slits 42 and the auxiliary slit 43 is lower than the unit weight of the absorbent material of the surrounding absorbent core 31. [ The peripheral absorbent core 31 is an absorbent core in a region adjacent to the width slit or the like. For example, in the absorbent core adjacent to the width slit 41 and the rear region S2 in the excretion accessory region S1, (41). The width slit 41, the front slit 42 and the auxiliary slit 43 may be a region where the unit weight of the absorbent material is lower than the surrounding absorbent core 31 and may be a region where the unit weight is zero, The unit weight on the absorbent core 31 may be zero, but it may be a region in which the absorbent material mixed from the surrounding absorbent core 31 is disposed.

The width slit 41, the front and rear slits 42, and the auxiliary slit 43 of the present embodiment have a unit weight of zero in design. Therefore, the skin surface sheet 10 and the non-skin surface sheet (hereinafter, referred to as " skin surface sheet 10 ") in the region overlapping the width slit 41 in the thickness direction T, 20 are not disposed. The skin surface sheet 10 and the non-skin surface sheet (hereinafter, also referred to as " skin surface sheet ") are formed in the region overlapping the width slit 41 in the thickness direction T, 20 are not bonded.

In addition, in the region overlapping the width slit 41, the region overlapping the front and rear slits 42, and the region overlapping the auxiliary slit 43, the core wraps 32 positioned on the skin- The core wraps 32 positioned on the non-skin surface side of the core 31 may be bonded or not bonded. For example, according to the configuration in which the core wraps 32 positioned on the skin-facing side of the absorbent core 31 and the core wraps 32 positioned on the skin non-opposing face side of the absorbent core 31 are bonded, the absorbent core 31 ) Can be suppressed. The topsheet 11 and the core wraps 32 may be bonded to each other in the area overlapping the width slit 41, the area overlapping with the front and rear slits 42 and the area overlapping the auxiliary slit 43, It does not need to be. The non-skin facing sheet 20 and the core wrap 32 may be bonded to each other in an area overlapping the width slit 41, an area overlapping the front and rear slits 42, and an area overlapping the auxiliary slit 43 , It may not be bonded.

The width slit 41, the front and rear slits 42, and the auxiliary slit 43 become boundaries at which the rigidity is changed. Specifically, for example, the rigidity of the front side region is different from the stiffness of the rear side region of the width slit 41 than the width slit 41. More specifically, the unit weight of the absorbent material in the front region than the width slit 41 is higher than the unit weight of the absorbent material in the width slit 41. [ The unit weight of the absorbent material in the area behind the width slit 41 is higher than the unit weight of the absorbent material in the width slit 41. [

The width slit 41 extends in the width direction W between the excretion mouth contact area S1 and the rear area S2. The width slit 41 may extend at least in the width direction, or may be a straight line parallel to the width direction, or a straight line or a curved line that is not parallel to the width direction but inclined with respect to the width direction. The width slit of the present embodiment has a curved shape in which the widthwise center of the width slit 41 protrudes rearward. More specifically, the center of the width slit 41 in the width direction is positioned behind the outer edge of the width slit 41. The center of the width slit 41 in the width direction is a convex shape facing backward. The length of the width slit in the longitudinal direction may be constant or may be varied. The length of the width slit in the front-rear direction is not less than 10 mm and not more than 50 mm, and more preferably the length of the width slit in the back-and-forth direction is not less than 10 mm but not more than 30 mm.

For example, when the length of the width slit 41 in the anteroposterior direction is less than 10 mm, the function of buffering or dividing the movement of the front side of the width slit 41 and the rear side of the width slit 41 can not be sufficiently obtained There is a case. When the length of the width slit 41 in the anteroposterior direction exceeds 50 mm, the function of buffering or dividing the movement of the front side of the width slit 41 and the rear side of the width slit 41 becomes large, There is a case where the degree of comfort as an absorbent article is reduced.

The width of the width slit 41 is preferably 25 mm or more. In general, the length of the middle portion of the sanitary napkin for night use (the length in the width direction of the relatively high unit weight) of the used portion 33 is often 25 mm or more and 30 mm or less. For example, if the used portion 33 is formed continuously to the excretory bag contact area S1 and the rear area S2, if the movement of the excretory port contact area S1 is interlocked with the rear area S2 by this used part . However, since the length of the width slit 41 in the width direction is 25 mm or more, the used portion 33 is divided in the forward and backward directions to suppress the movement of the excretion port contact region S1 to interlock with the rear region S2 .

The width slit 41 may be formed in the entire width direction of the absorbent core 31 or may be formed in a part of the width direction of the absorbent core. The width slit 41 of the present embodiment is formed in the entire width direction of the absorbent core 31. The outer edge 41E of the width slit 41 is located at the outer edge 31E of the absorbent core 31. [ The absorbent core 31 of the excretion mouth contact region S1 and the absorbent core 31 of the rear region S2 are divided in the forward and backward directions by the width slit 41. [ The outer edge of the absorbent core 31 and the outer edge of the absorbent core 30 substantially coincide with each other in the absorbent body 30 of the present embodiment. The outer edge 41E of the width slit 41 is shown coincident with the outer edge of the absorber 30. [

The front and rear slits 42 extend in the front-rear direction L in the rear region S2. The front and rear slits 42 may extend at least in the front-rear direction, or may be straight, parallel to the front-rear direction, or may be straight or curved, not parallel to the front-rear direction but inclined with respect to the front-rear direction. The front and rear slits 42 may be formed in the entire region of the front and rear direction L of the absorbent core 31 in the rear region S2 and may be formed in a part of the rear region S2 in the front and rear direction of the absorbent core 31 May be formed. The front and rear slits 42 of the present embodiment are formed in the entire region of the front and rear direction L of the absorbent core of the rear region S2. Therefore, the absorbent core 31 of the rear region S2 is divided in the width direction by the front and rear slits 42.

It is preferable that the front end edge of the front and rear slit 42 is located behind the position 30 mm behind the center 3LC in the front-rear direction of the wing 3. It is preferable that the rear end edge of the front and rear slit 42 is positioned behind the position 200 mm behind the center 3LC in the back and forth direction of the wing 3. The longitudinal length of the front and rear slits 42 is preferably 150 mm or more. In the cross section along the anteroposterior direction of the wearer's body, the grooves between the buttocks start from the vicinity beyond the perineum and remain until they reach the coccyx. According to the front and rear slits 42, the convex deformation with the front and rear slits as apexes can be easily arranged in the grooves between the buttocks.

The length of the front and rear slits 42 in the width direction is not less than 1 mm and not more than 15 mm. For example, when the length in the width direction of the front and rear slits 42 is less than 1 mm, when the front and rear slits 42 are deformed convexly at the apex, the absorbent cores 31 arranged with the width slit interposed , So that it is difficult to be reliably deformed into a convex shape. When the length in the width direction of the front and rear slits 42 exceeds 15 mm, when the convex deformed portion with the front and rear slits 42 as apexes is disposed in the gap between the buttocks, There is a case where the absorption of body fluids becomes uneven.

The absorbent core 31 of the rear region S2 has a first region 311 and a second region 312 and a third region 313 respectively located outside the width direction of the first region 311. [ FIG. 1 shows a range of widths of the first area 311, the second area 312 and the third area 313. The first region 311, the second region 312 and the third region 313 are regions obtained by dividing the absorbent core 31 of the rear region S2 into three equal parts in the width direction. The first area 311 is an area located at the center in the width direction among the three equal areas. The second area 312 is an area located at one side in the width direction among the three areas. The third area 313 is an area located on the other side in the width direction among the three areas. In the configuration in which the length in the width direction of the absorbent core of the rear region S2 is changed, the absorbent core 31 adjacent to the width slit 41 is divided into three regions in the width direction.

The front and rear slits 42 are formed in the first region 311. The front and rear slits 42 may be disposed at the center of the width direction W of the absorbent article 1. The front and rear slits 42 are configured so that the absorbent core 31 of the rear region S2 can be bent in the thickness direction T and more specifically, As shown in Fig. The front and rear slits 42 constitute a first curved portion.

The width slit 41 and the front and rear slits 42 are continuous. The absorbent core 31 of the excretion mouth contact region S1 and the absorbent core 31 of one side in the width direction W of the rear region S2 And the absorbent core 31 on the other side in the width direction W of the rear region S2 (for example, the absorbent core located on the right side of the wearer) is divided. The width slit 41 and the front and rear slits 42 may be spaced apart from each other.

The auxiliary slit 43 is continuous with the front and rear slits 42 and extends outward in the width direction W from the front and rear slits 42. The auxiliary slit 43 may extend at least in the width direction, or may be a linear shape parallel to the width direction, or a straight or curved shape that is not parallel to the width direction but inclined with respect to the width direction. The auxiliary slits (43) extend to both sides in the width direction of the front and rear slits (42). A plurality of auxiliary slits 43 are formed at intervals in the forward and backward directions L. The outer edge 43E of the auxiliary slit 43 is positioned inside the width direction W of the outer edge 31E of the absorbent core 31 of the rear region S2. That is, the absorbing material is arranged on the outer side in the width direction of the auxiliary slit 43. The auxiliary slit 43 may extend to the outer edge 31E of the absorbent core 31 in the rear region S2. The auxiliary slit 43 extends forward as it extends from the inside of the width direction W (on the front and rear slit 42 side) to the outside in the width direction W. [

The auxiliary slit 43 is configured so that the absorbent core 31 of the rear region S2 forms a starting point of bending in the thickness direction. The auxiliary slit 43 constitutes a second curved portion. The first curved portion and the second curved portion may be constituted by not only the front and rear slits but also other structures. For example, the first curved portion and the second curved portion may be constituted by at least a pressed portion in which the absorbent core is pressed in the thickness direction, and the absorbent core may be constituted by regions having different rigidity due to different unit weights , Or an emboss formed by engaging the concave portion and the convex portion.

The absorbent article is provided with a pressed portion 80 in which at least the absorbent core is pressed in the thickness direction. The crimping portion 80 has a front crimping portion 81, a rear crimping portion 82, and a hip flap crimping portion 83. The front squeezing portion 81 is disposed in the excretory port contact area S1 and the front area S3 and the absorbent body 30 and the topsheet 11 are compressed in the thickness direction. The front squeezing portion 81 extends in the front-rear direction from both sides in the width direction than the center in the width direction of the piercing contact area S1. The front edge of the front side pressing portion 81 has a linear shape that tapers toward the front side.

The rear side pressing portion 82 is disposed in the second region 312 and the third region 313 of the rear region S2 and the absorbent body 30 and the topsheet 11 are compressed in the thickness direction . The rear pressing portion 82 is formed in the region where the absorbent core is disposed. The rear side pressing portion 82 extends in the forward and backward directions L on both outer sides in the width direction than the auxiliary slit 43. The rear-side crimping portion 82 may extend at least in the front-rear direction, or may be a linear shape parallel to the front-rear direction, or a curved shape that is not parallel to the front-rear direction but inclined with respect to the front-rear direction. The rear squeezing portion 82 is located on the outer side in the width direction than the auxiliary slit 43 and on the inner side in the width direction than the outer side edge of the absorbent core. The rear side crimping portion 82 does not overlap the auxiliary slit 43 in the thickness direction. The front-side press portion 81 and the rear-side press portion 82 need only be pressed with the absorbent core. The rear pressing portion 82 is formed by compressing the absorbent core 31 and the skin surface sheet (topsheet 11) from the skin facing surface side T1 toward the skin non-facing surface side T2.

The hip flap crimping portion 83 is disposed in the rear region S2 and the side sheet 12 and the non-skin face sheet 20 are compressed in the thickness direction. The hip flap crimping portion 83 is formed in the hip flap. The hip flap crimping portion 83 extends in the front-rear direction. The hip flap crimping portion 83 has a convex shape protruding outward in the width direction W.

The absorbent article (1) has a wing (3) and a hip flap (4). The wings 3 and the hip flaps 4 extend outward in the width direction from the outer edge 31E of the absorbent core 31 in the excretion mouth contact area S1.

The wing (3) has a side sheet (12) and a non-skin side sheet (20). The front and rear center 3LC of the wing 3 is disposed opposite to the excretion of the wearer. The wings 3 are configured to be able to return to the side of the non-skin facing sheet 20 and return to the skin non-facing side of the crotch portion of the undergarment in use. The hip flap 4 is located on the rear side of the wing 3 and on the rear side region S2. The hip flap 4 is configured so as to be disposed on the skin-facing surface side of the undergarment without being returned to the skin-facing surface side of the undergarment in use. In addition, the wing 3 and the hip flap 4 may be provided with an absorbent material.

2, an adhesive region 60 to which an adhesive for fixing the absorbent article to the undergarment S is applied is formed on the non-skin facing side of the non-skin facing sheet 20. The adhesive region 60 includes a first body sticking region 61 and a second body sticking region 62 disposed on the skin non-facing surface side of the absorbent core 31 and a wing sticking region 63 and a hip flap adhesive region 64 disposed in the hip flap 4. As shown in Fig.

The first main body sticking area 61 is spaced apart from the second main body sticking area 62 in the front and rear direction and is disposed forward of the second main body sticking area 62. [ The first main body sticking area 61 is arranged on the front side of the width slit 41 across the excretory port contact area S1 and the front area S3. The second body sticking area 62 is arranged in the rear area S2 on the rear side of the width slit 41. [

The width slit 41 and the front and rear slits 42 are not overlapped with the adhesive region 60 in the thickness direction T. [ In other words, the adhesive region 60 is not formed in the region where the width slit 41 and the front and rear slits are arranged when viewed in plan view. In addition, the wing 3 and the hip flap 4 are provided with an adhesive region 60.

The adhesive region 60 is covered with the release sheet 65 in a state before use. The release sheet 65 prevents the adhesive from deteriorating before use. The release sheet 65 is peeled off by the wearer in use. In the case of the absorbent article having no release sheet, the adhesive sheet may be prevented from deteriorating before use by a package sheet for individually packaging the absorbent article.

The " thickness of the absorber " in this specification is measured by the following measuring method.

When the absorbent article 1 is sealed in a package or the like, the sample is taken out of the package and left in the state of 20 ° C ± 2 ° C and 60% ± 5% RH for 12 hours.

The measuring position is the center in the width direction of the absorber. In the measurement, the elastic member of the absorbent article is stretched, not in a state in which the absorbent article is small, and is measured. Further, portions other than the absorber such as skin surface sheet and non-skin surface sheet other than the absorber are removed. Using a dial gauge PEACOCK manufactured by Ozaki Seisakusho Co., Ltd., a specimen having a diameter of 10 mm and a size of 30 mm x 30 mm is prepared, and the thickness of the specimen is measured. The measuring instrument is adjusted so that the measured pressure on the specimen is 3 g / cm 2. Here, for the 10 samples, the above-described measurement was performed in each state, and the average value was taken as the length.

The " unit weight and density of the absorber " in this specification are to be measured by the following measuring method.

When the absorbent article 1 is sealed in a package or the like, the sample is taken out of the package and left in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours in this state.

In the case of the absorbent article packaged by the package, the package is opened and the folded absorbent article is expanded to measure the thickness and the area of the unit for measuring the unit weight and density. Then, the unit for measuring the unit weight and the density is cut out from the absorbent article, and the weight of the cut portion is measured. Subsequently, the portion other than the absorber such as the topsheet and the backsheet is removed from the cut-out portion, and the weight of the absorber is measured. The unit weight is calculated on the basis of the weight of the absorber, the unit weight, and the area of the portion for measuring the density. The density is calculated based on unit weight and thickness.

The term " length " in this specification shall be measured by the following measuring method.

When the absorbent article 1 is sealed in a package or the like, the sample is taken out of the package and left in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours in this state.

Then, the length of this state of the measurement target site is measured by using a spring metering (tape: vinyl chloride coating with glass fiber) manufactured by Shinwa Socute Co., Ltd., along the measurement target site. Here, the above-mentioned measurements were made for each of the 10 samples in each state, and the average value was taken as the length.

(2) Action / effect

In the absorbent article 1 of the present embodiment, the front and rear slits 42 formed at the center in the width direction of the rear region S2 rise to the wearer side as a first curved portion. The front and rear slits 42 allow the absorbent core 31 to fit in the gap between the wearer's buttocks in the rear region S2 located behind the excretory bag contact area S1. Further, in the absorbent article 1 of the present embodiment, the auxiliary slit 43 as the second curved portion forms a deformation starting point extending in the width direction. The absorbent core 31 of the rear side region S2 can be deformed from the auxiliary slit 43 as a starting point and is easily arranged along the rounding of the body in the cross section along the front and rear direction L of the body.

Fig. 4 is a cross-sectional view of the absorbent article 1 mounted on the wearer. Fig. 4 (a) is a cross-sectional view along the width direction in the excretory bag contact area S1, and Fig. 4 (b) is a cross-sectional view along the width direction in the rear region S2. Fig. 4 (a) is based on the section B-B in Fig. 1, and Fig. 4 (b) is based on the section C-C in Fig. In Fig. 4, a line indicating the wearer's body is indicated by a two-dot chain line. When the absorbent article 1 as a sanitary napkin is worn, the absorbent article is fixed to the undergarment S, and the underwear S is pulled up and worn. The dimension in the width direction of the absorbent core of the general sanitary napkin is designed to be wider than the dimension in the width direction of the wearer's napkin. Therefore, the excretion opening contact area S1 of the absorbent article 1 in a worn state is sandwiched by both legs of the wearer, and receives a force directed toward the inside in the width direction from the outside in the width direction.

The cross-sectional shape of the wearer's body along the width direction W of the absorbent core 31 is different near the crotch part and in the vicinity of the buttocks part. Concretely, the cross-sectional shape of the body along the width direction of the lateral heat of the wearer's crotch (near the vaginal opening where menstrual discharge is produced) is a convex shape protruding toward the absorbent article, bulging out from the dead part of the thigh. The excretory bag contact area (S1) of the absorbent article is disposed opposite to the crotch region below the wearer. The absorbent article 1 is mounted on the undergarment S and is worn by the wearer so that the absorbent core of the excretion port contact area S1 is pushed down to the protrusion of the labia majora and is deformed to protrude toward the skin non-facing surface side. Under the wearer's crotch, the absorbent core in the excretion accessory contact area S1 is disposed along the body, and leakage under the crotch can be suppressed.

Further, anus or dull heat is located behind the perineum part located behind the labia majora of the wearer. The cross-sectional shape of the body along the width direction of the posterior lower side than the perineal part is a shape in which the center in the width direction is recessed. And the rear region S2 of the absorbent article is disposed opposite to the buttocks of the wearer. For example, a sanitary napkin for night use is often used in a lying-on posture. Most of the leakage is due to the fact that a large amount of menstrual discharge is discharged at once and the absorption of the menstrual blood immediately below the vaginal opening is not sufficient or when the absorber located just below the vaginal opening is not pushed into the body, Acupuncture points into the hollow part, and the menstrual blood leaks through the body. If a clearance is formed between the buttocks of the body and the absorbent article, the menstrual blood may flow back to the back side of the back of the body in the sanitary napkin for nighttime use, and may leak from behind the absorbent article.

In the absorbent article of the present embodiment, the side portions of the absorbent core 31 are pushed down by the left and right buttocks in the rear region S2. Therefore, a force is applied to the side in the width direction of the absorbent core of the rear region, rather than the center in the width direction of the absorbent core 31 in the rear region. When the side portion of the absorbent core is pushed down by the left and right buttocks, the center in the width direction of the absorbent body in the rear region rises toward the wearer with the front and rear slits as apexes. Therefore, the widthwise center of the absorbent core 31 of the rear region S2 is easily disposed in the concave portion between the buttocks, and the absorbent core 31 can be disposed along the buttocks of the wearer. As a result, body fluids such as menstrual discharge can be prevented from leaking from behind the absorbent article by flowing along the back of the back of the body.

In the center in the width direction of the absorbent core 31 of the rear region S2, front and rear slits 42 penetrating in the thickness direction are formed, and substantially no absorbent material is disposed. Therefore, the thickness of the protruding portion, in particular, the vertex is thinned. When the absorbent material is disposed in the front and rear slits 42, the absorbent core 31 is easily maintained in a flat state due to the rigidity of the absorbent material, and the absorbent core 31 is bent It may become difficult to bend. However, since the absorbent material is not substantially disposed in the front and rear slits 42, the absorbent core 31 is easily held in a state where it is deflected from the front and rear slits 42. Therefore, the absorbent article 1 can be disposed more closely to the gap between the buttocks of the wearer, and leakage in the buttocks can be suppressed.

5 is a sectional view of the absorbent article 1 mounted on the wearer. 5 is a cross-sectional view taken along the longitudinal direction L of the body with reference to the A-A cross section shown in Fig. In Fig. 5, a line indicating the wearer's body is indicated by a two-dot chain line. In the absorbent article 1, a deforming fulcrum extending in the width direction is formed by the auxiliary slit 43. The absorbent core 31 of the rear side region S2 can be deformed from the auxiliary slit 43 as a starting point and is easily arranged along the rounding of the body in the cross section along the front and rear direction L of the body. When the absorbent core 31 of the rear region S2 is fitted along the front and rear direction of the body, the width of the auxiliary slit 43 is appropriately changed so that the auxiliary slit 43 is adjacent The distance between the absorbent core 31 and the absorbent core 31 is changed. Therefore, it is easy to arrange the absorbent core 31 along the rounding of the body in the cross section along the longitudinal direction of the body.

When the absorbent core 31 of the rear region S2 rises with the front and rear slits 42 as apexes, the bended stiffness of the bended absorbent core 31 in the forward and backward directions L increases. Therefore, there is a case that the absorbent core 31 becomes difficult to be arranged along the front-back direction L of the body. However, since the auxiliary slit 43 is formed, the rigidity of the absorbent core 31 is reduced by the auxiliary slit 43, and deformation of the absorbent core 31 following the rounding of the buttocks can be promoted.

When the outer edge 43E of the auxiliary slit 43 reaches the outer edge 31E of the absorbent core 31, an area extending from a portion abutting the center of the gap of the buttocks to the outer edge of the absorbent core 31 The absorbent core 31 may extend flat and the outer edge 31E of the absorbent core 31 may not cover the widthwise side of the buttocks (the widthwise outer side than the apex of the buttocks). However, since the outer edge 43E of the auxiliary slit 43 is positioned inward in the width direction from the outer edge 31E of the absorbent core 31, the absorbent core 31 is not divided in the anteroposterior direction L . In addition, when deforming from the auxiliary slit 43 as a starting point, the absorbing core 31 disposed outside the auxiliary slit 43 in the width direction becomes a point. Therefore, when the absorbent core 31 is deformed along with the rounding of the body along the anteroposterior direction L, the absorbent core 31 can be deformed into a continuous state in the anteroposterior direction L. [ Therefore, the absorbent core 31 of the rear region S2 is easily formed into a cup shape surrounding the side portion of the buttocks, and leakage from the buttocks can be effectively suppressed.

The absorbent core 31 of the rear region S2 is separately deformed to the left and right by the front and rear slits 42 and the absorbent core 31 of the rear region S2 is deformed to the left and right separately You can follow. For example, when the wearer is walking, the left and right feet are alternately moved. Depending on the movement of this leg, the buttocks also move in the right and left alternately. For example, when the entire width direction of the absorbent core 31 of the rear region S2 is moved integrally, the entire absorbent core 31 of the rear region S2 is moved to the left and right as the legs alternately move, There is a case where the fit feeling in the case is not stable. However, since the absorbent core 31 of the rear region S2 is divided into right and left by the front and rear slits 42, by alternately moving the legs, the absorbent core 31 of the absorbent core 31 of the absorbent core 31, (31) moves. Therefore, one of the absorbent cores 31 with the front and rear slits 42 therebetween can be moved in accordance with the movement of the body, and the other absorbent core 31 can be continuously pushed into the body. Further, by continuously pouring the absorbent core of the rear region S2 in the buttocks, rubbing of the wearer's buttocks and the absorbent article can be suppressed, and deterioration of the wearing feeling due to skin rash can be suppressed.

The absorbent core 31 may be provided with a width slit 41 extending in the width direction W between the slit-contact area S1 and the rear area S2. The width slit 41 is formed between the excretion hole contact area S1 and the rear area S2 so that the deformation of the absorbent core 31 is absorbed by the width slit 41 in the longitudinal direction of the absorbent core 31 So that the absorbent core 31 of the excretion mouth contact region S1 and the absorbent core 31 of the rear region S2 can be deformed into different forms.

As described above, the cross-sectional shape of the wearer's body along the width direction W of the absorbent core 31 is different near the crotch region and in the vicinity of the buttocks. The absorbent core 31 of the excretion port contact area S1 is pushed down by the protrusion of the labia majora of the wearer and is deformed to protrude toward the skin non-facing surface side. The deformation of the absorbent core 31 in the excretion port contact area S1 propagates rearward in a region up to the width slit 41. [ However, the deformation of the absorbent core in the excretion port contact area S1 is divided by the width slit 41 and is difficult to propagate to the absorbent core 31 of the rear region S2. The absorbent core 31 of the rear region S2 rises to the wearer side and is disposed in the gap between the right and left buttocks. Therefore, in the buttocks of the wearer, the absorbent core 31 of the rear region S2 is arranged along the body, so that leakage in the buttocks can be suppressed.

A plurality of auxiliary slits 43 may be formed at intervals in the forward and backward directions L. The cross-sectional shape of the wearer's body in the forward and backward directions is rounded. A plurality of auxiliary slits 43 are formed in the absorbent core 31 of the rear region S2 so that absorption of the rear region S2 from the plurality of auxiliary slits 43 spaced in the forward and backward directions L The core 31 is easily deformed. Therefore, the absorbent core 31 of the rear region S2 is disposed to fit in the gap of the buttocks along the rounding of the body.

3, the absorbent core 31 of the present embodiment is provided with the first auxiliary slit 431, the second auxiliary slit 432, the third auxiliary slit 433, and the fourth auxiliary slit 433 from the front side, The auxiliary slit 434 is formed. The second auxiliary slit 432 is easy to keep the planar state by being pressed by the buttocks when sleeping in a straight upright posture. The second auxiliary slit 432 divides the pressed force on the buttocks and moves the first auxiliary slit 431 on the front side of the second auxiliary slit 432 along the convex portion between the buttocks and the leg portions Can be deployed. In addition, the third auxiliary slit 433 is disposed at a position where the curved shape when viewed from the side of the body abuts against the buttock which largely curves in a state other than the sleeping posture (for example, standing posture). The absorbent core 31 can be easily deformed with the third auxiliary slit 433 as a starting point so that the absorbent core 31 can be disposed along the portion where the curved shape abuts the buttock which greatly deforms.

The first auxiliary slit 431 and the fourth auxiliary slit 434 are disposed at positions where they abut the folding line when the absorbent article is folded and folded from the folding line along the width direction. Since the auxiliary slit 43 is disposed at a position where it abuts the folding line, the auxiliary slit 43 lowers rigidity and enables the absorbent article to be stably folded. Further, when the absorbent article is developed (used), folding marks by folding lines are difficult to occur, so that the absorbent article can easily be deformed into an intended state. Specifically, it is easy to fit the absorbent article in the gap between the buttocks. Furthermore, for example, in the configuration in which the slit such as the auxiliary slit is not formed on the folding line of the absorbent article, the absorbent core in the rear region has a relatively strong folding line extending in the width direction. This makes it difficult for the absorbent article to be pliably pushed toward the back of the body from the side of the back of the body, and leakage tends to occur due to the gap between the body and the absorbent article. On the other hand, since the auxiliary slit 43 is formed on the folding line of the absorbent article, it is possible to make the absorbent article fit on the body at the position of the auxiliary slit 43. [

The auxiliary slit 43 may extend forward as it extends outward in the width direction from the front and rear slits 42. Since the back side of the absorbent core 31 of the rear region S2 is pressed by the buttocks, a force is applied from the rear side toward the front side. Since the auxiliary slit 43 extends forward as it goes outward in the width direction from the front and rear slits 42, the force directed from the rear to the forward side is externally outward in the width direction by the auxiliary slit 43, . The auxiliary slit 43 is easily deformed in accordance with the force while exerting the force directed from the rear side to the front side so that the absorbent core 31 can be disposed along the buttocks.

The absorbent material may not be disposed between the skin surface sheet 10 and the non-skin surface sheet 20 in an area overlapping the front and rear slits 42 in the thickness direction. Since the absorbent material is not arranged in the area overlapping the front and rear slits 42, the thickness of the apex protruded by the front and rear slits 42 becomes thinner. Therefore, it is possible to arrange the absorbent article in the gap between the buttocks of the wearer in a more fitable manner, so that leakage in the buttocks can be suppressed.

The front and rear slits 42 do not need to overlap the adhesive region 60 in the thickness direction T. [ It is possible to prevent the deformation of the front and rear slits 42 from being excessively inhibited by the undergarment by preventing the front and rear slits 42 from overlapping with the adhesive region in the thickness direction, Is easily deformed.

The rear region S2 may be formed with a hip flap 4 extending outward in the width direction from the outer edge 31E of the absorbent core 31 in the excretion mouth contact region S1. The hip flap 4 is formed in the rear region S2 so that the hip flap 4 is pushed down as well as the side portions (the second region and the third region) of the absorbent core 31 at the time of wearing. Therefore, the absorbent core 31 is more likely to rise as the apex of the front and rear slits 42. Therefore, the absorbent core 31 is disposed along the wearer's buttocks, so that the effect of suppressing leakage in the buttocks can be more easily obtained.

The hip flap 4 may be provided with a convex heap flap crimping portion 83 protruding outward in the width direction W. [ By forming the hip flap crimping portion 83, the hip flap 4 is easily deformed along with the rounding of the buttocks, so that the hip flap 4 can be arranged to cover the rounding of the buttocks. Therefore, leakage in the buttocks can be further suppressed.

The excretion hole contact area S1 may have a used portion 33 located on the inner side in the width direction than the outer edge 31E of the absorbent core 31. [ The middle portion 33 is formed in the excretion hole contact area S1 so that the wearer can feel the elasticity at the center in the width direction of the excretion mouth contact area S1 (inside in the width direction than the outer edge 31E of the absorbent core 31) The absorbent core is more likely to come into close contact. Therefore, as shown in the sectional view shown in Fig. 4 (a), the adhesion in the excretion port contact area S1 can be enhanced. As a result, it is possible to realize the pit of the absorbent article in the rear region S2 and the fit of the absorbent article in the excretory port contact region S1.

(3) Other Embodiments

The absorbent article of the present embodiment is a night napkin for nighttime to be attached to the undergarment, but as another embodiment, it may be an absorbent pad such as a urine absorbent pad to be attached to the diaper.

The width slit 41, the front and rear slits 42 and the auxiliary slit 43 of the present embodiment are designed such that the unit slit 41, the front slit 42, the auxiliary slit 43, May be a low unit weight region having a lower unit weight than the surrounding absorbent core. The auxiliary slit 43 may extend in at least the width direction, and may be a curved shape, a rhombic shape in a plan view, or an inverted triangle in a plan view (a shape having a vertex directed to the rear side).

Although the present invention has been described in detail with reference to the above embodiments, it is apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and variations without departing from the spirit and scope of the present invention as defined by the appended claims. Accordingly, the description herein is for illustrative purposes only and is not meant to be limiting in any way to the invention.

On the other hand, the entire contents of Japanese Patent Application No. 2014-260773 filed on December 24, 2014 are incorporated herein by reference.

According to the present invention, it is possible to provide an absorbent article capable of restraining leakage by fitting an absorbent core to the buttocks of the wearer.

1: absorbent article 3: wing 4: hip flap 10: skin surface sheet 11: top sheet 12: side sheet 20: non-skin facing sheet 30: absorbent 31: absorbent core 31: A first slit (first slit), 43: a second slit (second slit), and a second slit (second slit) The present invention relates to a method for producing a wiping adhesive sheet which comprises a wiping adhesive area and a heap flap adhesive area in which the wiping adhesive is applied to the wiping area of the wiping area. T: Thickness direction, T1: Skin facing surface side, T2: Skin non-opposing surface side, W: Width direction, S1: Excretion mouth contact area, S2: Rear area, S3: Squeeze part, 83: Hip flap compression part, L: : Front side region

Claims (10)

An excretory bag contact area opposed to the excretion of the wearer,
A rear region located rearward of the excretion port contact region,
And an absorbent core disposed in the excretion port-contacting region and the rear region,
The absorbent core of the rear region is provided with a front and rear slits which are disposed at the center in the width direction of the absorbent core and which extend in the front and rear direction of the absorbent article and that are continuous with the front and rear slits, The auxiliary slit is formed to extend,
And the outer edge of the auxiliary slit is located inward in the width direction than the outer edge of the absorbent core in the rear region. The absorbent article as set forth in claim 1, wherein the absorbent core has a width slit extending in a width direction of the absorbent article between the excretion mouth contact area and the rear area. The absorbent article as set forth in claim 1 or 2, wherein a plurality of said auxiliary slits are formed at intervals in the longitudinal direction. The absorbent article as set forth in claim 1 or 2, wherein the auxiliary slit extends forward as it extends outward in the width direction from the front and rear slits. The absorbent core according to any one of claims 1 to 3, further comprising: a skin surface sheet positioned on the skin-
Skin surface sheet which is located on the skin non-facing surface side than the absorbent core,
Wherein the absorbent material is not disposed between the skin surface sheet and the non-skin surface sheet in an area overlapping the front and rear slits. The absorbent core according to any one of claims 1 to 3, further comprising a non-skin facing sheet positioned on the skin non-facing surface side of the absorbent core,
Wherein an adhesive region on which an adhesive for fixing the absorbent article to the undergarment is formed is formed on the skin non-facing surface of the non-skin face sheet,
Wherein the front and rear slits do not overlap the adhesive region in the thickness direction. The absorbent article as set forth in claim 1 or 2, wherein the rear region has a hip flap extending outward in the width direction from an outer edge of the absorbent core in the excretion mouth contact region. The absorbent article as set forth in claim 7, wherein the hip flap is formed with a convex heap flap press portion protruding outward in the width direction. The absorbent core according to any one of claims 1 to 4, wherein the excretion port contact region has a middle portion (middle portion) located inside the width direction than the outer edge of the absorbent core,
Wherein the thickness of the used part is thicker than the thickness of the outer edge of the absorbent core in the excretion mouth contact area. An excretory bag contact area opposed to the excretion of the wearer,
A rear region located rearward of the excretion port contact region,
And an absorbent core disposed in the excretion port-contacting region and the rear region,
The absorbent core of the rear region is provided with a first curved portion configured such that the center of the absorbent core in the widthwise direction of the rear region can be bent in a convex shape toward the wearer and a first curved portion in which the absorbent core of the rear region is curved in the thickness direction And a second curved portion extending in the width direction is formed,
And the outer edge of the second curved portion is located on the inner side in the width direction than the outer edge of the absorbent core in the rear region.

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