KR20170066509A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article capable of restraining backward leakage when the wearer is lying on the stomach. The absorbent article 1 is provided with a first curved portion 41 extending rearward beyond the center of the front and rear direction L of the wing 3 and extending in the width direction W in front of the rear end edge of the absorbent core , And a second curved portion (42) located behind the first curved portion (41) and extending in the width direction (W). The absorbent article 1 has a first region R1 adjacent to the first curved portion 41 in front of the first curved portion 41 and a second curved portion 42 at the rear of the second curved portion 42. [ And an intermediate region R3 positioned between the first valley portion 41 and the second valley portion 42 in the forward and backward directions L. The second region R2 is located adjacent to the first valley portion 41 and the second valley portion 42. [ The unit weight of the absorbent material of the middle region R3 is lower than the unit weight of the absorbent material of the first region R1 and lower than the unit weight of the absorbent material of the second region R2. The length of the middle region R3 in the anteroposterior direction L is longer than the thickness of the absorbent 30 in the portion of the first region R1 adjacent to the first valley portion 41. [

Description

[0001] ABSORBENT ARTICLE [0002]

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

The absorbent article for night use is used when the wearer is lying down, and is used for a long period of time in comparison with the absorbent article for daytime use. Therefore, when the absorbent article for night use is used, rear leakage tends to occur. Patent Document 1 discloses a night absorbent article for preventing rear leakage.

The absorbent article of Patent Document 1 has an exiting portion opposed portion which is arranged to face the liquid dispensing portion of the wearer and a rear portion which is arranged on the back side of the excretion portion opposed portion. The absorber on the rear portion has a plurality of high-density portions and low-density portions extending in the width direction. In the absorbent article of Patent Document 1, the body fluid is maintained by the high-density portion having a relatively high density when the body fluid flows backward, and the low-density portion having a relatively low density deforms smoothly to suppress rearward leakage.

Japanese Patent Application Laid-Open No. 2010-136900

However, it has been found that the above-described absorbent article has the following problems. The Applicant has variously examined the deformation of the wearer's body in a lying state. As a result, it was found that the wearer in the lying state was deformed by the body pressure to deform the absorbent article into an unintended state.

More specifically, a wearer who is lying downward is pressed against the bulging portion of the buttocks. The bulged part of the buttocks moves to the crotch side. The absorbent article placed against the crotch region of the wearer is pressed by the crushed portion of the buttocks of the buttocks and deforms away from the body of the wearer. As a result, a gap is formed between the crotch region of the wearer and the absorbent article, and the backward leakage sometimes occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article capable of restraining rear leakage in a state in which a wearer is lying on a stomach.

The absorbent article (absorbent article 1) according to the present disclosure has a front and back direction (front and back direction L) and a width direction (width direction W) orthogonal to each other, (Absorbent core 30) having an absorbent core (absorbent core 31) laminated with the absorbent core (skin absorbent core 31), a skin face sheet (skin face sheet 10) (Main body 2) having a non-skinned cotton sheet (non-skinned cotton sheet 20) positioned on the side of the main body, and a non-skinned cotton sheet (non-skinned cotton sheet) 20 extending outward in the width direction from the outer edge of the main body, The absorbent article has a wing (wing (3)) which can be folded toward the skin surface sheet side. The absorbent article has a wing (3) rearward from the center of the wing in the anteroposterior direction and forward of the rear end edge of the absorbent core A curved portion (a first curved portion 41), and a curved portion And a second curved portion (second curved portion) which is located at the rear side and which extends in the width direction is formed in the first curved portion and the second curved portion, wherein the first curved portion and the second curved portion are configured such that the absorbent article is bent in the thickness direction (First region R1) adjacent to the first curved portion on the front side of the first curved portion, and a second region adjacent to the second curved portion on the rear side of the second curved portion; (Intermediate region R3) positioned between the first valley portion and the second valley portion in the front-rear direction, and a second region (second region R2) The unit weight of the material is lower than the unit weight of the absorbent material in the first region and lower than the unit weight of the absorbent material in the second region, Adjacent to the first curved portion of the region And that the longer than the thickness of the absorbent body to the base.

The absorbent article (absorbent article 1) according to the present disclosure has an absorbent core (hereinafter, referred to as " absorbent article 1 ") having absorbent materials laminated in a longitudinal direction (longitudinal direction L) and a transverse direction (Skin sheet 10) located on the skin-facing surface side of the absorbent body, and a non-skin-side non-skin-side non-skin- (Main body portion 2) having a face sheet (non-skin cotton sheet 20), and a main body portion (main body portion 2) extending outward in the width direction from the outer edge of the main body portion, The absorbent article has a wing (wing (3)). The absorbent article has a first curved portion (first curved portion (the first curved portion) extending in the width direction, 41) which is located rearwardly of the first curved portion, Wherein the first curved portion and the second curved portion are configured such that the absorbent article can be bent in the thickness direction, and the absorbent article is configured such that the first curved portion and the second curved portion are configured to be bent in the thickness direction, (First region R1) adjacent to the first valley portion in front of the first valley portion and a second region (second region R1) adjacent to the second valley portion behind the second valley portion, (Intermediate region R3) located between the first valley portion and the second valley portion in the front-rear direction, and the unit weight of the absorbent material in the middle region is a weight Is lower than the unit weight of the absorbent material in the first region and is lower than the unit weight of the absorbent material in the second region and the length of the middle region in the longitudinal direction is 10 mm or more and 50 mm or less do.

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 cross-sectional view of the AA cross section shown in Fig.
Figs. 4 (a), 4 (b) and 4 (c) are schematic views for explaining the attachment state of the absorbent article shown in Fig.
5 is a plan view of an absorbent article according to a modification.

(1) Overall structure of the absorbent article

The entire configuration of the absorbent article 1 according to the embodiment will be described with reference to Figs. 1 to 3. Fig. In the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. It should be noted, however, that the drawings are schematic and that the proportions 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. In addition, the drawings may also include mutually different portions or portions having different ratios.

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 a night.

The absorbent article 1 has a front and back direction L extending to the front side (back side) and rear 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 1 includes an absorbent body 30 having an absorbent core laminated with an absorbent material, a skin face sheet 10 positioned on the skin facing side T1 than the absorbent body 30, And a non-skin face sheet 20 located on the opposite face side T2. 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, As shown in Fig. The non-skin facing sheet 20 is a liquid impermeable 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 blood 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 main body 2, the blade 3 and the hip flap 4, which will be described later.

The non-skinned cotton sheet 20 has a length substantially equal to the length of the skinned cotton sheet 10. The non-skin facing sheet 20 may be a laminate nonwoven fabric mainly made of a polyethylene sheet or polypropylene, a sheet having a breathable resin film bonded to a nonwoven fabric such as a breathable resin film, a spun bond or a spun lace .

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 absorbent article 1 has a body portion 2, a wing 3, and a hip flap 4. The main body portion 2 is located at the center of the width direction W of the absorbent article 1 and extends in the back and forth direction L. [ The wings 3 and the hip flaps 4 extend outward in the width direction W from the outer edge 2E of the main body 2. The outer edge 2E of the body portion 2 coincides with the outer edge 30E of the absorbent body 30. [

The main body portion 2 has a skin surface sheet 10, a non-skin surface sheet 20, and an absorbent body 30. More specifically, the main body portion 2 includes a topsheet 11, a portion of the side sheet 12, a non-skin facing sheet 20, and an absorbent body 30.

The blade (3) has a side sheet (12) and a non-skin face sheet (20). The front and rear center 3LC of the blade 3 is disposed opposite to the excretion of the wearer. The blade (3) is configured to be foldable toward the non-skin facing sheet (20) side, and is folded toward the skin non-facing surface side of the crotch part of the undergarment at the time of use. The bottom flap (4) is located behind the wing (3). The hip flap 4 is configured so as not to be folded toward the skin non-facing surface side of the undergarment at the time of use but to be disposed on the skin-facing surface side of the undergarment.

The inner edge 12E of the side sheet 12 is folded outward in the width direction W along the forward and backward direction L. As shown in Fig. Between the folded side sheets 12, a stretchable member 91 that stretches and shrinks in the forward and backward directions L is disposed. The inner edge 12E of the side sheet 12 is not bonded to the topsheet 11. The inner edge 12E and the elastic member 91 of the side sheet 12 constitute a standing leak-proof cuff. The stretchable member 91 is disposed over the first curved portion 41 and the second curved portion 42 which will be described later in the forward and backward directions L. [ More specifically, the front end edge 91F of the stretchable member 91 is located forward of the first curved portion 41 and the rear end edge 91R of the stretchable member 91 is located rearward of the second curved portion 42 .

As shown in Fig. 2, an adhesive region 60 is formed on the skin non-facing surface of the non-skin facing sheet 20, to which an adhesive for fixing the absorbent article to the undergarment S is applied. The adhesive region 60 includes a first main body adhesive region 61 and a second main body adhesive region 62 disposed in the main body 2 and a wing adhesive region 63 disposed in the wing 3, Flap adhesive region 64 disposed in the flap 4. [ 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 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 during use. On the other hand, in the case of the absorbent article having no release sheet, the adhesive sheet may be structured so as to prevent the adhesive from deteriorating before use by a package sheet for individually packaging the absorbent article.

In the absorbent article 1, a first curved portion 41 and a second curved portion 42 are formed. The first curved portion 41 and the second curved portion 42 are located rearward of the center 3LC in the front and rear direction of the blade 3 and forward of the rear edge of the absorbent core 31. [ The first curved portion 41 and the second curved portion 42 extend in the width direction W and are configured such that the absorbent article 1 can be bent in the thickness direction T. [ On the other hand, in the absorbent body 30 of the present embodiment, the trailing edge of the absorbent core substantially coincides with the trailing edge of the absorbent core.

The absorbent article 1 has a first region R1 adjacent to the first curved portion 41 in front of the first curved portion 41 and a second curved portion 42 at the rear of the second curved portion 42. [ And an intermediate region R3 positioned between the first valley portion 41 and the second valley portion 42 in the forward and backward directions L. The second region R2 is located adjacent to the first valley portion 41 and the second valley portion 42. [ The first region R1 is a region from the front edge 30F of the absorber 30 to the first valley portion 41. [ The second region R2 is a region from the rear edge 30R of the absorber 30 to the second curved portion 42. [ The middle region R3 is an area between the first valley portion 41 and the second valley portion 42. [

The unit weight of the absorbent material of the middle region R3 is lower than the unit weight of the absorbent material of the first region R1 and lower than the unit weight of the absorbent material of the second region R2. On the other hand, the intermediate region R3 may be a region where the unit weight of the absorbent material is lower than that of the first region R1 or the like and may be a region where the unit weight is zero. ) Or the like may be disposed.

The first tread portion 41 becomes a boundary where rigidity changes. The rigidity of the area on the front side of the first trough portion 41 and the rigidity of the area on the rear side of the first trough portion 41 are different. More specifically, the unit weight of the absorbent material in the area before the first trough portion 41 is higher than the unit weight of the absorbent material in the area behind the first trough portion 41. Therefore, the rigidity on the front side of the first tread portion 41 is higher than the rigidity on the rear side of the first tread portion 41.

The second curved portion 42 is located behind the first curved portion 41. The second trough portion 42 is a boundary where the rigidity changes. The rigidity of the area on the front side than the second trough part 42 is different from the rigidity of the area on the rear side of the second trough part 42. [ More specifically, the unit weight of the absorbent material in the region before the second trough portion 42 is lower than the unit weight of the absorbent material in the region behind the second trough portion 42. Therefore, the stiffness of the front side of the second tread portion 42 is lower than the stiffness of the rear side of the second tread portion 42.

The length of the intermediate region R3 in the anteroposterior direction L is longer than the thickness of the absorber 30 in the portion adjacent to the first curved portion 41 in the first region R1. On the other hand, in the configuration in which the thickness of the absorber 30 of the first region R1 changes, the length in the anteroposterior direction of the middle region R3 is longer than the length of the absorber 30 in the portion adjacent to the first trough portion 41 But may be configured to be shorter than the thickness of the other part of the first area (for example, the center part in the front-rear direction).

The length of the intermediate region R3 in the longitudinal direction is preferably 10 mm or more and 50 mm or less. On the other hand, in the configuration in which the length in the front-rear direction of the middle region R3 changes, the length in the front-rear direction at the center in the width direction of the middle region R3 may be 10 mm or more and 50 mm or less. More preferably, the length of the intermediate region R3 in the anteroposterior direction is 10 mm or more and 30 mm or less.

It is preferable that the distance L1 between the center 41WC in the width direction of the first trough portion 41 and the center 3LC in the forward and backward direction of the blade is 25 mm or more. The distance L1 between the center 41WC in the width direction of the first trough portion 41 and the center of the blade in the longitudinal direction is preferably 80 mm or less. On the other hand, in the configuration in which the first trough portion 41 has a predetermined length in the forward and backward directions, the distance between the center in the width direction of the front end edge of the first trough portion 41 and the center of the front and rear direction of the blade is 25 mm or more and 80 mm or less .

The first curved portion 41 and the second curved portion 42 are curved in a convex shape toward the rear as viewed in a plan view. More specifically, the center of the first valley portion 41 in the width direction is located behind the outer edge of the first valley portion 41. [ The center of the first trough portion 41 in the width direction is a convex shape facing backward. The center in the width direction of the second trough portion 42 is located behind the outer edge of the second trough portion 42. [ The center of the second trough portion 42 in the width direction is a convex shape facing backward. On the other hand, the distance between the first curved portion 41 and the second curved portion 42 in the longitudinal direction may be constant or may vary.

The first curved portion 41, the second curved portion 42 and the middle region R3 are not overlapped with the adhesive region 60 in the thickness direction T. [ The first main body sticking area 61 is disposed in the first area R1 and the second main body sticking area 62 is disposed in the second area R2. The rear end edge 61R of the first body sticking area 61 is located in front of the first curved part 41 and the front end edge 62F of the second body sticking area 62 is located in front of the second curved part 42 And is located at the rear.

The outer edge 41E of the first trough portion 41 and the outer edge 42E of the second trough portion 42 are located at the outer edge of the absorbent core 31. [ That is, the first curved portion 41 and the second curved portion 42 are formed over the entire width direction of the absorbent core. The absorbent core 31 is divided in the forward and backward directions L by the first curved portion 41 and the second curved portion 42. On the other hand, 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 first curved portion 41 and the outer edge 42E of the second curved portion 42 are shown to coincide with the outer edge 30E of the absorber 30. [

The absorbent body 30 has a used portion 33 located inside the widthwise direction of the outer edge 30E of the absorbent body 30. [ The used portion 33 is located in the first region R1 and inward in the width direction than the outer edge 30E of the absorbent body 30 of the first region R1. In Fig. 1, the middle part 33 is indicated by an oblique line. The thickness of the used portion 33 is thicker than the thickness of the outer edge 30E of the absorber 30 in the first region R1. 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 30E of the absorbent body 30 in the first region R1. The used portion 33 is located on the rear side in the first region R1 and is adjacent to the first curved portion 41. [

On the other hand, in the constitution in which the absorbent body has the two-layered absorbent layer, the middle portion of the absorbent body may have the two-layered absorbent layer, and the absorbent body may have only one absorbent layer other than the used portion. As a modified example, a configuration may be employed in which an auxiliary sheet for attracting a used additional fluid of an absorber is provided, and the auxiliary sheet other than the used portion of the absorber is not provided.

3, the rear surface 33R of the middle portion 33 extending in the thickness direction T from the rear end edge 33R of the middle portion 33 (in the cross-section along the longitudinal direction L of the absorbent article 1) 33RS of the used portion 33 and the angle? Formed by the skin non-facing surface of the used portion 33 is larger than the angle? Between the front surface 33F of the used portion 33 extending in the thickness direction T from the front edge 33F of the used portion 33 33FS and the skin non-opposing face of the used portion 33. In this case, The angle alpha is an angle formed by the rear surface 33RS of the used portion 33 and the skin non-facing surface of the used portion 33 extending forward from the rear edge 33R of the used portion 33. [ The angle beta is an angle formed by the front surface 33FS of the used portion 33 and the skin non-facing surface of the used portion 33 extending rearward from the front edge 33F of the used portion 33 .

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 from the package, and the sample is allowed to stand in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours.

The measuring position is the center of the article in the width direction of the absorber. When the measurement is made, the elastic member of the absorbent article is stretched and measured, not in a reduced state. 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 thickness.

In the present specification, the " unit weight and density of the absorber " 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 from the package, and the sample is allowed to stand in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours.

In the case of the absorbent article packaged by the package, the package is opened and the folded absorbent article is developed to measure the thickness and the area of the unit for measuring the unit weight and density. Subsequently, the portion 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, portions other than the absorber such as the topsheet and the backsheet are 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. Based on the unit weight and thickness, the density is calculated.

In this specification, the " length " 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 from the package, and the sample is allowed to stand in an atmosphere of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours.

Subsequently, 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 Sokuote Kikai Co., Ltd., along the measurement target site. Here, for the 10 samples, the above-described measurement was performed in each state, and the average value was taken as the length.

The " angle of the used part of the absorber " in this specification is measured by the following measuring method. In the case of the absorbent article packaged by the package, the package is opened, the folded absorbent article is opened, a photograph is taken from the side of the absorbent article, and the angle of alpha and beta shown in Fig. 3 is measured by the diaper .

(2) Mounting state of the absorbent article

Next, the mounting state of the absorbent article 1 constructed as described above will be described. 4 is a cross-sectional view taken along the line A-A in Fig. 1 in a state in which the absorbent article 1 is mounted on the wearer. Fig. 4 (a) shows a wearer wearing the absorbent article 1 in a line state. The first area R1 of the absorbent article 1 is fixed to the crotch part of the undergarment (the part facing the wearer's crotch area) through the first body sticking area 61. [ The second region R2 of the absorbent article 1 is fixed to the rear portion of the crotch portion of the undergarment (the portion facing the wearer's buttocks) through the second body sticking region 62. [ When the wearer is in a line state, the wearer's buttocks are in a bulged state.

Fig. 4 (b) is a state in which the cross section shown in Fig. 4 (a) is rotated by 90 degrees and the wearer is laid down. In the state where the wearer lies downward, the body of the wearer is pressed by the bedding, but in FIG. 4 (b), the body of the wearer is not pressed by the bedding for convenience of explanation. Fig. 4 (b) shows a line LB indicating bedding. The area where the bedding line (LB) overlaps with the body is a region where the body is pressed by the bedding and deforms when the body is lying down.

Fig. 4 (c) shows a state in which the body of the wearer lying downward is pressed and deformed by the bedding. In the state shown in Fig. 4 (c), the region where the body and the bedding line overlap in Fig. 4 (b) is deformed. More specifically, the bulging portion of the buttocks of the wearer is crushed, and a part of the buttocks of the wearer has a flat shape. The crushed portion of the buttock moves to the crotch side and bulges from the portion where the leg is attached to the leg end side. The second curved portion 42 is disposed at the end on the hip side of the crushed portion of the buttock and the first curved portion 41 is disposed on the crotch side of the crushed portion of the buttock. Therefore, the middle region R3 of the absorbent article is deformed along the crushed portions of the buttocks, and is disposed along the crushed portions of the buttocks.

(3) Action / effect

The center 3LC of the wing in the anteroposterior direction is a position facing the excretion of the wearer. A first curved portion 41 and a second curved portion 42 are formed on the rear side of the vane 3. The deformation starting point of the first curved portion 41 and the deformation starting point of the second curved portion 42 are formed at a position that touches the buttocks behind the wearer's excretion hole. Therefore, when the bulged portion of the buttocks is collapsed, the absorbent article 1 flexibly deforms along the deformation of the buttocks.

Between the first valley portion 41 and the second valley portion 42, an intermediate region R3 having a relatively low unit weight of the absorbent material is formed. Since the unit weight of the absorbing material is low, the middle region R3 is easily deformed smoothly. The deformation of the buttocks is absorbed by the middle region R3 when the crushed portion of the buttock moves to the crotch side and the first region R1 and the second region R2 continue to be awaited to the wearer. The first region R1 and the second region R2 are divided by the intermediate region R3 and the force is prevented from propagating from the first region R1 to the second region R2.

The length of the intermediate region R3 in the anteroposterior direction L is longer than the thickness of the absorbent 30 in the portion adjacent to the first valley portion 41 in the first region R1. The deformation of the buttocks is absorbed by the middle region R3, and the stepped portion absorbing deformation of the buttocks is formed behind the first region R1. Thus, the front side of the intermediate region R3 can be arranged so as to oppose the excretion of the wearer, and the rear side of the intermediate region R3 can be arranged to face the wearer's buttocks. Therefore, the gap between the absorbent article and the body can be reduced and the backward leakage can be suppressed.

The length of the intermediate region R3 in the anteroposterior direction L is 10 mm or more. For example, when the length of the intermediate region in the anteroposterior direction is less than 10 mm, the bulged portion of the buttocks may not sufficiently absorb the crushed portion. On the other hand, when the length in the anteroposterior direction of the middle region R3 is 10 mm or more, deformation of the buttocks can be effectively absorbed.

The length of the intermediate region R3 in the forward and backward directions L is 50 mm or less. The length of the middle region R3 in the anteroposterior direction L is 50 mm or less so that the body fluid can be absorbed by the second region R2 while absorbing deformation of the body by the middle region R3 . Therefore, the flow of menstrual blood to the buttocks can be suppressed. On the other hand, in the configuration in which the length of the middle region R3 in the anteroposterior direction L is longer than 50 mm, the user feels anxiety that menstrual discharge flows to the buttocks side, and it becomes difficult to obtain relief at the time of wearing.

The length of the intermediate region R3 in the forward and backward directions L is 10 mm or more and 50 mm or less. The length in the front-rear direction of the relatively easily deformable intermediate region R3 is 10 mm or more and 50 mm or less, so that the deformation of the body can be absorbed by the intermediate region R3. The deformation of the buttocks is absorbed by the middle region R3, so that the wearer can easily keep the first region R1 and the second region R2 on standby. The first region R1 and the second region R2 are divided by the intermediate region R3 and the force is prevented from propagating from the first region R1 to the second region R2. Thus, the front side of the intermediate region R3 can be arranged so as to oppose the excretion of the wearer, and the rear side of the intermediate region R3 can be arranged to face the wearer's buttocks. Therefore, the gap between the absorbent article and the body can be reduced and the backward leakage can be suppressed.

The distance L1 between the center 41WC of the widthwise direction W of the first trough portion 41 and the center 3LC of the forward and backward direction L of the blade 3 is 25 mm or more and 80 mm or less. As a result of various investigations by the present applicant, the strain point of the crotch part in the buttocks is often located 25 mm or more behind the center of the blade 3 in the anteroposterior direction L. Therefore, when the distance L1 between the center 41WC of the first curved portion 41 in the width direction W and the center 3LC of the front and back direction L of the blade 3 is 25 mm or more, The first tread portion 41 and the middle region R3 are located at the starting point of the deformation of the first tread portion. When the distance L1 between the center 41WC of the first curved portion 41 in the width direction W and the center 3LC of the front and back direction L of the blade 3 exceeds 80 mm, The first curved portion 41 and the middle region are located at the portion where the body pressure of the buttocks is most applied, and there is a possibility that an uncomfortable feeling may occur.

The first curved portion 41 and the second curved portion 42 are curved in a convex shape toward the rear as viewed in a plan view. The portion curved in a convex shape toward the rear is bulged into a convex shape toward the rear together with the underwear when laid down, and is pushed in a direction away from the body. The first trough portion 41, the second trough portion 42 and the middle region R3 are separated from the body and are laid up by the first trough portion 41, the second trough portion 42 and the middle region R3 It is possible to absorb the deformation of the time. Thus, the first region R1 and the second region R2 are maintained in a shape that follows the rounded shape of the body, so that the entire absorbent article is disposed along the rounded shape of the body.

The adhesive region 60 is not overlapped with the first valley portion 41, the second valley portion 42 and the middle region R3 in the thickness direction T. [ The portion fixed to the undergarment of the absorbent article 1 (the portion where the adhesive region is formed) is liable to follow the underwear and to be deformed. For example, when the first curved portion 41, the second curved portion 42, and the middle region R3 are attached to the underwear through the adhesive region, if the body is crushed in a state of lying downward, . There is a case where the absorbent article is deformed unintentionally following the undergarment, resulting in a gap between the wearer and the absorbent article. However, since the first curved portion 41, the second curved portion 42, and the middle region R3 are not fixed to the undergarment, they can be freely deformed. Therefore, even when the first region R1 and the second region R2 are deformed together with the underwear, the force transmitted from the undergarment is divided at the middle region R3, ). ≪ / RTI >

The used portion 33 is adjacent to the first curved portion 41 in the first region R1. The thickness of the used portion 33 is thicker than the thickness of the region of the absorber 30 other than the used portion. The difference in rigidity and thickness between the first region R1 and the middle region R3 becomes larger by forming the middle portion 33 of the first region R1 and the first trough portion 41 adjacent to each other, . Therefore, the intermediate region R3 and the first region R1 can be arranged so as to conform to the body in different shapes.

The angle? Formed by the rear face 33RS of the used portion 33 and the skin non-opposing face of the used portion 33 is larger than the front face 33FS of the used portion 33 and the skin ratio of the used portion 33 Is larger than the angle (beta) formed by the opposing face. When the angle between the side surface of the absorbent body and the skin non-facing surface of the absorbent body is large, the absorbent body is likely to bend from the skin non-facing surface, as compared with a case where the angle formed by the side surface of the absorbent body and the skin non- For example, when the angle of the front surface of the used portion 33 is large, a folding starting point is formed on the front surface of the used portion 33, which may lower the fitability of the front surface of the used portion 33. [ However, since the angle formed by the front surface of the used portion 33 and the skin non-facing surface is relatively small, the front surface of the used portion 33 is hard to be folded, and the fitability of the front surface of the used portion 33 can be maintained. On the other hand, since the angle formed by the rear surface of the middle portion 33 and the skin non-facing surface is relatively large, a folding origin is likely to be formed on the rear surface of the middle portion 33. [

The stretchable member 91 is disposed over the first curved portion 41 and the second curved portion 42 in the forward and backward directions L. [ The first region R1 on the front side of the first curved portion 41 and the second region R2 on the rear side of the second curved portion 42 can be brought close to each other by the contraction of the elastic member 91. [ Therefore, even if the intermediate region R3 is wrinkled due to the deformation of the first bend portion 41 or the like, the wrinkle can be prevented.

The outer edge 41E of the first trough portion 41 and the outer edge 42E of the second trough portion 42 are located at the outer edge of the absorbent core 31. [ Therefore, the entire widthwise direction of the absorbent core 31 is easily deformed from the first curved portion 41 and the second curved portion 42 as a starting point. Further, since the first region R1 and the second region R2 are divided in the forward and backward directions L, propagation of one deformation state to the other can be suppressed.

(4) The absorbent article according to the modification

Subsequently, the absorbent article 1A according to the modified example will be described. On the other hand, in the description of the absorbent article 1A according to the modified example, a configuration different from that of the above-described embodiment will be described, and the same constituent elements as those of the above-described embodiment will be denoted by the same reference numerals and description thereof will be omitted.

The absorbent article 1A according to the modified example has a pressed portion 80 in which at least the absorbent body 30 is compressed in the thickness direction. In the compression bonding portion 80 of the present embodiment, the topsheet 11 and the absorbent body 30 are compressed in the thickness direction. The crimping portion 80 has a first crimping portion 81 disposed in the first region R1 and a second crimping portion 82 disposed in the second region R2.

The first crimping portion 81 includes a pair of first front and rear crimping portions 81L extending in the front and rear direction and a first width crimping portion 81L located in front of the first front and rear crimping portions 81L and extending in the width direction. (81W). The first front-rear pressing portion 81L is located on the outer side in the width direction than the center in the width direction of the first region R1.

On the other hand, the first front-rear pressing portion 81L may be formed so as to be inclined with respect to a straight line extending in the front-rear direction L, and may be formed by a straight line extending in the front- And the angle (acute angle side) is 45 degrees or less. The first width crimping portion 81W may be formed to be inclined with respect to a straight line along the width direction W and may be formed by a straight line along the width direction W and by a first width crimping portion 81W And the angle (acute angle side) is less than 45 degrees.

The used portion 33 is surrounded by the first width crimping portion 81W, the pair of first front and rear pressing portions 81L and the first curved portion 41. [ The pair of first front and rear pressing parts 81L are arranged along the outer edge of the middle part 33. [ The bulging portion of the used portion 33 is easily held because the pressed portion 80 surrounds the used portion 33 so that the used portion 33 is fit to the excretion hole of the wearer.

The first trough portion 41 and the second trough portion 42 have a straight shape along the width direction. The outer edge 41E of the first trough portion 41 and the outer edge 42E of the second trough portion 42 are located on the outer side in the width direction with respect to the first front and rear pressing portion 81L. On the other hand, in the configuration in which the widthwise position of the first front-rear pressing portion 81L is changed as in the modification shown in Fig. 5, at least the rear edge of the first front-rear pressing portion 81L And the portion closest to the second curved portion 42) may be located on the outer side in the width direction than the first front and rear pressed portion 81L.

It is desirable that the first region R1 ahead of the first trough portion 41 and the second region R2 behind the second trough portion 42 are reliably divided in order to keep the structure fit to the body Do. In a state in which the absorbent article 1 is worn, the first region R1 and the first curved portion 41 are sandwiched by the legs of the wearer, and the width is reduced, so that it rises toward the skin-facing side. Therefore, it fits into the body. On the other hand, the second curved portion 42 and the second region R2 maintain a flat shape, and both a fit and a good fit are satisfied. Therefore, when the width of the outer edge of the first curved portion 41 is narrower than the width of the first curved portion, And the division effect of the first region and the second region is hardly obtained. However, since the outer edge 41E of the first trough portion 41 and the outer edge 42E of the second trough portion 42 are located on the outer side in the width direction with respect to the crimping portion 80, The first curved portion 41 and the second curved portion 42 can form a starting point of deformation in an area reaching the outer side in the width direction than the portion 80. [ Therefore, the whole width direction of the used part can be easily deformed, and the division effect of the first area and the second area can be obtained.

The absorbent core 31 is disposed on the outer side in the width direction of the first trough portion 41, the outer side in the width direction of the middle region R3 and the outer side in the width direction of the second trough portion 42. [ Therefore, the absorbent core according to the modified example is not divided in the front-rear direction by the first curved portion 41 and the second curved portion 42. [ For example, when the absorbent core is divided in the longitudinal direction by the first trough portion 41 and the second trough portion 42, the first core portion 41 and the second trough portion 42 are deformed So that unintended wrinkles may occur.

However, since the absorbent core is not divided in the longitudinal direction by the first curved portion 41 and the second curved portion 42, the first curved portion 41 and the second curved portion 42 are used as the starting point It is possible to suppress deformation and suppress the occurrence of unintended wrinkles.

(5) Other Embodiments

The absorbent article of the present embodiment is a sanitary napkin for night use, but may be a sanitary napkin for a day, as another embodiment. The sanitary napkin may not be provided with a hip flap.

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

(6) Comparative evaluation

Next, comparative evaluation of the length of the intermediate area will be described. Table 1 shows the results of comparative evaluation of the lengths of the intermediate regions. In the comparative evaluation test, the absorbent article of each of Examples 1 to 4 and the absorbent articles of Comparative Examples 1 to 3 were compared to evaluate anxiety about the holding state of the pit property and apparent absorbency. The absorbent article of each of Examples 1 to 4 and the absorbent article of Comparative Examples 1 to 3 have different lengths in the longitudinal direction of the middle region R3, but the other structures are the same.

The comparative evaluation test was conducted by 20 women using sanitary napkins. In the evaluation test, the practitioner was made to view and use the sample of interest, and the following questions were asked.

Question 1 "Is the fit retained compared with the sanitary napkin which I usually use?" A sample having a ratio of "answered" to "question 1" of 65% or more was evaluated as "good" in sensory evaluation. In addition, a sample having a ratio of "answered" to "1" was less than 65%, and the sensory evaluation was not good.

Question 2 "Is it less anxious about apparent absorptiveness compared to the sanitary napkin I usually use (or does it cause anxiety)?" The sample with the ratio of the number of people who answered "no anxiety" or "no anxiety" was 65% or more in the answer to the question 2, and the evaluation was good. In addition, the sample having a ratio of "less anxiety" or "no anxiety" to the number of people who answered "less than anxiety" was less than 65% in question 2, and the sensory evaluation was not good.

The absorbent article according to each of Examples 1 to 4 had a longitudinal length of 10 to 50 mm in the middle region and a satisfactory result was obtained for both the retention evaluation of pit property and the evaluation of anxiety about absorbency. As a result, it was found that the length of the intermediate region in the forward and backward directions is preferably 10 mm or more and 50 mm or less. More specifically, it was found that good results are obtained with respect to the pitability by making the length in the front-rear direction of the intermediate region 10 mm or more. It was also found that the anxiety about the absorbency can be suppressed when the length of the intermediate region is 50 mm or less.

Subsequently, the push-out amount of the crushed portion of the buttock of the wearer laid down to the crotch was measured. (P1 in Fig. 4 (c)) of the crushed portion of the buttocks of the wearer lying on the upper side and the leg side end portion (P2 in Fig. 4 (c) Respectively. The amount of exudation of 5 testers was measured. The measurement results are shown in Table 2.

From the measurement results, it was found that the push-out amount of the buttocks was 10 mm to 30 mm. Therefore, it was found that the bulging portion from the crotch side end of the crushed portion of the wearer's buttocks to the end side of the leg portion protruding from the buttocks can be covered by the longitudinal length of the middle region of 10 mm or more.

On the other hand, the entire contents of Japanese Patent Application No. 2014-203190 filed on October 1, 2014 are incorporated herein by reference.

According to the present invention, it is possible to provide an absorbent article capable of restraining rear leakage in a state in which the wearer is lying on the stomach.

1: absorbent article 2: main body part
2E: outer edge 3: wing
3LC: center of the wing in the anteroposterior direction 4: hip flap
10: skin surface sheet 11: surface sheet
12: side sheet 20: non-skin cotton sheet
30: absorber 33: used part
41: first curved portion 42: second curved portion
60: adhesive region 61: first body adhesive region
62: second body sticking area 63: wing sticking area
64: Hip flap adhesion area 80:
81: first pressing portion 82: second pressing portion
91: elastic member R1: first region
R2: second region R3: middle region
L: forward and backward direction T: thickness direction
T1: Skin facing surface T2: Skin non-facing surface
W: width direction

Claims (14)

Rear direction and a width direction orthogonal to each other,
A body portion including an absorbent body having an absorbent core in which an absorbent material is laminated, a skin face sheet positioned on the skin-facing face side of the absorbent body, and a non-skin face sheet positioned on the skin non-
An absorbent article extending outward in the width direction from the outer edge of the body portion and having a wing that can be folded toward the non-skin face sheet side in use,
A first curved portion extending rearwardly of the center of the blade in the front and rear direction and extending in the width direction and forward of the rear end edge of the absorbent core and a second curved portion located rearward of the first curved portion, A second curved portion extending from the first curved portion to the second curved portion,
Wherein the first curved portion and the second curved portion are configured such that the absorbent article can be bent in the thickness direction,
Wherein the absorbent article includes a first region adjacent to the first valley portion in front of the first valley portion, a second region adjacent to the second valley portion behind the second valley portion, and a second region adjacent to the second valley portion in the front- And an intermediate region located between the first valley portion and the second valley portion,
The unit weight of the absorbent material in the intermediate region is lower than the unit weight of the absorbent material in the first region and lower than the unit weight of the absorbent material in the second region,
And the length of the intermediate region in the anteroposterior direction is longer than the thickness of the absorber at a portion adjacent to the first valley portion of the first region. The absorbent article according to claim 1, wherein the length of the intermediate region in the anteroposterior direction is 10 mm or more. The absorbent article according to claim 2, wherein the length of the intermediate region in the anteroposterior direction is 50 mm or less. The absorbent article according to any one of claims 1 to 3, wherein the distance between the center of the first valley portion in the width direction and the center of the vane in the anteroposterior direction is 25 mm or more and 80 mm or less. The absorbent article as set forth in any one of claims 1 to 3, wherein the first curved portion and the second curved portion curved in a convex shape toward the rear as viewed in plan. 4. The method according to any one of claims 1 to 3,
Wherein the non-skin facing sheet of the main body portion is provided with an adhesive region coated with a pressure-sensitive adhesive for fixing the absorbent article to the undergarment,
Wherein the first valley portion, the second valley portion, and the intermediate region are not overlapped with the adhesive region in the thickness direction. 4. The method according to any one of claims 1 to 3,
Wherein the absorbent body has a middle portion which is positioned inward in the width direction than the outer edge of the absorbent body,
The thickness of the used portion is thicker than the thickness of the outer edge of the absorber in the first region,
Wherein the used portion is adjacent to the first curved portion in the first region. 9. The absorbent article as set forth in claim 7, wherein an angle formed by the rear surface of the middle portion of the absorbent article extending in the thickness direction from the trailing edge of the middle portion and the skin non-facing surface of the middle portion, And an angle formed by the front surface of the used portion extending in the thickness direction from the front edge and the skin non-facing surface of the used portion. 8. The method of claim 7,
And a compressed portion in which the absorbent body is compressed in the thickness direction,
And the pressing portion is disposed along an outer edge of the used portion. The absorbent article as set forth in claim 9, wherein an outer edge of the first curved portion and an outer edge of the second curved portion are located on the outer side in the width direction than the pressed portion. 4. The method according to any one of claims 1 to 3,
And a stretchable member that stretches and contracts in the longitudinal direction,
Wherein the stretchable member is disposed over the first curved portion and the second curved portion in the front-back direction. The absorbent article according to any one of claims 1 to 3, wherein the outer edge of the first valley portion and the outer edge of the second valley portion are located at the outer edge of the absorbent core. The absorbent core according to any one of claims 1 to 3, wherein the outer side in the width direction of the first valley portion, the outer side in the width direction of the intermediate region, and the outer side in the width direction of the second valley portion, Is disposed. Rear direction and a width direction orthogonal to each other,
A body portion including an absorbent body having an absorbent core in which an absorbent material is laminated, a skin face sheet positioned on the skin-facing face side of the absorbent body, and a non-skin face sheet positioned on the skin non-
An absorbent article extending outward in the width direction from the outer edge of the body portion and having a wing that can be folded toward the non-skin face sheet side in use,
A first curved portion extending rearwardly of the center of the wing in the front-rear direction and extending in the width direction and forward of the rear end edge of the absorbent core; and a second curved portion located rearwardly of the first curved portion, Two curved portions are formed,
Wherein the first curved portion and the second curved portion are configured such that the absorbent article can be bent in the thickness direction,
Wherein the absorbent article includes a first region adjacent to the first valley portion in front of the first valley portion, a second region adjacent to the second valley portion behind the second valley portion, and a second region adjacent to the second valley portion in the front- And an intermediate region located between the first valley portion and the second valley portion,
The unit weight of the absorbent material in the intermediate region is lower than the unit weight of the absorbent material in the first region and lower than the unit weight of the absorbent material in the second region,
And the length of the intermediate region in the anteroposterior direction is 10 mm or more and 50 mm or less.

Images