TWI702943B - Absorbent articles - Google Patents

Abstract

The present invention provides an absorbent article that allows the absorbent core to be attached to the wearer's buttocks to suppress leakage. The absorbent article (1) has: an excretion opening abutment area (S1) opposite to the excretion opening of the wearer; a rear area (S2) located behind the excretion abutment area; and The excretion opening abuts the absorbent core (31) of the domain and the back domain. The absorbent core in the back domain is provided with front and rear slits (42) arranged in the center of the widthwise direction of the absorbent core and extending in the front and rear direction of the absorbent article; and connected to the front and rear slits, and from the front and rear slits Auxiliary slits (43) extending outward in the widthwise direction. The outer edge (43E) of the auxiliary sipe is positioned inward in the widthwise direction than the outer edge (31E) of the absorbent core of the back domain.

Description

Absorbent articles

The present invention relates to an absorbent article such as sanitary napkins for sanitary use.

Patent Document 1 discloses an absorbent article having a middle-high part swelling toward the skin abutting surface side, and a leak-proof groove provided on both outer sides of the middle-high part in the width direction, and a surface sheet and an absorbent body are pressed. The excretion opening contact area of the absorbent article is sandwiched by the wearer's legs in the installed state and exerts a force toward the inside of the widthwise direction. In the absorbent article of Patent Document 1, if a force toward the inside of the widthwise direction is applied, the leak-proof groove is bent toward the skin side of the wearer's crotch, and the mid-high part of the absorbent body is raised accordingly (see Patent Document 1 Paragraph 0016).

[Advanced Technical Literature] [Patent Literature]

[Patent Document 1] JP 2012-239722 A

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

The cross-sectional shape of the body along the widthwise direction near the wearer's buttocks is a shape in which the left and right buttocks are raised and the buttocks are recessed. The mid-to-high portion of Patent Document 1 extends rearward from the excretion opening contact area, and therefore, if the absorber in the excretion opening contact area bulges, the absorber in the rear area also bulges. Since the mid-high portion of the back domain of Patent Document 1 has a high basis weight, when it swells toward the wearer's side, the thickness of the swelling becomes thick, and it is difficult to arrange it along the recess of the body's buttocks. As a result, a gap is generated between the wearer's buttocks and the absorbent article, and leakage may occur.

In addition, the cross-sectional shape of the body along the front-rear direction of the wearer is a shape with a curve from the excretory opening contact area to the back. If the absorbent core of the back domain is not arranged along the curve of the body, back leakage may occur.

The present invention was developed in view of the above-mentioned problems, and its purpose is to provide an absorbent article that can allow the absorbent core to be attached to the wearer's buttocks and can suppress leakage.

In order to solve the above-mentioned problems, the absorbent article (absorbent article 1) of the present invention is provided with: an excretion opening contact area (excretion opening contact area S1) opposite to the excretion opening of the wearer; The mouth contact area is further located on the back side domain (rear side domain S2); and the absorbent article of the absorbent core (absorbent core 31) arranged in the aforementioned excretion mouth contact area and the aforementioned rear area, the gist of which is : The absorbent core in the back domain is provided with: is arranged in the center of the width direction of the absorbent core, facing the absorbent article The front and rear sipes (front and rear sipes 42) extending in the front and rear direction of the sipe; and the auxiliary sipes (auxiliary sipes 43) that are connected to the front and rear sipes and extend from the front and rear sipes toward the outside of the widthwise direction. The outer edge (outer edge 43E) of the slit is located on the inside in the widthwise direction than the outer edge (outer edge 31E) of the absorbent core of the aforementioned back domain.

In addition, the absorbent article (absorbent article 1) of the present invention is provided with: an excretion opening contact area (excretion opening contact area S1) opposed to the excretion opening of the wearer; The back domain (rear domain S2) on the back side; and the absorbent article of the absorbent core (absorbent core 31) arranged in the excretion opening abutment domain and the back domain, the gist of which is: The absorbent core of the side region is provided with: a first curved portion (front and rear slits 42), which is configured to make the center of the absorbent core of the rear side region convexly curved toward the wearer's side; and 2 curved portion (auxiliary slit 43), which constitutes the deformation base point for bending the absorbent core of the back side domain in the thickness direction and extends in the widthwise direction. The outer edge (outer edge 43E) of the second curved portion, It is located on the inside in the widthwise direction than the outer edge (outer edge 31E) of the aforementioned absorbent core.

1‧‧‧Absorbent articles

3‧‧‧wing piece

4‧‧‧Hip Wings

10‧‧‧Skin face sheet

11‧‧‧Surface sheet

12‧‧‧Side sheet

20‧‧‧Non-skin face sheet

30‧‧‧Absorber

31‧‧‧Absorbent core

31E‧‧‧Outer edge of absorbent core

311‧‧‧Region 1

312‧‧‧Section 2

313‧‧‧Region 3

32‧‧‧Core cladding

41‧‧‧Wide side slit

42‧‧‧Front and rear slits (Part 1)

43‧‧‧Auxiliary slit (Part 2)

60‧‧‧Adhesion area

61‧‧‧The first body adhesion area

62‧‧‧Second body adhesion area

63‧‧‧Fin adhesion area

64‧‧‧Hip wing adhesion area

80‧‧‧Press section

81‧‧‧Exhaust press section

82‧‧‧Rear press section

83‧‧‧Hip Wing Press

L‧‧‧Front and back direction

T‧‧‧Thickness direction

T1‧‧‧Skin facing side

T2‧‧‧Non-skin facing side

W‧‧‧Wide side direction

S1‧‧‧Excretion opening contact domain

S2‧‧‧Back domain

S3‧‧‧Front domain

[Fig. 1] is a plan view of the absorbent article of the embodiment.

[Fig. 2] is a bottom view of the absorbent article shown in Fig. 1.

[Fig. 3] is a schematic cross-sectional view of the A-A section shown in Fig. 1.

[Figure 4] Figures 4(a) and 4(b) are the absorbent material shown in Figure 1 A cross-sectional view of the product 1 installed by the user.

[Fig. 5] is a cross-sectional view of a state where the absorbent article 1 shown in Fig. 1 is installed by a wearer.

(1) The overall structure of absorbent articles

1 to 3, the overall structure of the absorbent article 1 of the embodiment will be described. In addition, in the description of the following drawings, the same or similar code|symbol is attached|subjected to the same or similar part. However, if the drawing is a model, you must pay attention to the difference between the ratio of each size and the actual one. Therefore, the specific dimensions must be judged with reference to the following description. In addition, even in the drawings, parts with different dimensional relationships and ratios can be included.

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

The absorbent article 1 has: a front-rear direction L extending toward the front side (ventral side) and back side (back side) of the wearer; a widthwise direction W orthogonal to the front-rear direction L; and the skin of the wearer The thickness direction T in which the facing surface side T1 and the non-skin facing surface side T2 extend.

The absorbent article has: an excretion port contact area S1 arranged in the excretion port contact area of the wearer; a rear side area S2 located behind the excretion port contact area S1; and an excretion port Abutting the front side of domain S1 Front side domain S3. The length of the front-rear direction L of the rear side domain S2 is longer than the length of the front-rear direction L of the excretion port contact domain S1. The excretion opening abutting domain S1 is an area where the underpants are attached to the lower part of the crotch when the underpants are installed. In the excretion opening abutment area S1, a fin described later is arranged. The boundary between the excretion port abutting area S1 and the rear side area S2 is a wide-sided slit 41 described later. The front edge of the wide-sided sipe 41 is the rear edge of the drainage port abutting domain S1, and the rear-end edge of the wide-sided sipe 41 is the front edge of the rear side domain S2. In addition, the rear end edge of the rear domain S2 is the rear end edge of the absorbent article 1. The boundary between the drainage port abutting domain S1 and the front domain S3 is the leading edge of the fin 3. The front end edge of the fin 3 is the root of the fin 3, and is a part located on the front side of the most recessed part of the fin 3 in the widthwise direction. The root of the front side of the fin 3 is the front end edge of the excretion opening abutting domain S1 and the rear end edge of the front domain S3. In addition, the front end edge of the front side domain S3 is the front end edge of the absorbent article 1. FIG. 3 shows the range in the front-rear direction of the excretion port abutting domain S1, the rear domain S2, and the front domain S3.

The absorbent article 1 is provided with: an absorber 30, a skin sheet 10 located on the skin-facing side T1 than the absorber 30, and a non-skin located on the non-skin-facing side T2 than the absorber 30面片20。 Noodle slices 20. The skin sheet 10 has: a liquid-permeable surface sheet 11 covering at least the center in the widthwise direction of the absorbent body 30; and an outer edge (outer end in the widthwise direction) covering the outer edge of the surface sheet 11, extending outward in the widthwise direction Extending side sheet 12. The non-skin surface sheet 20 is a liquid-impermeable sheet.

The surface sheet 11 is a liquid permeable through liquid such as body fluids Sexual flakes. The surface sheet 11 covers at least the surface of the absorber 30. The surface sheet 11 is not particularly limited as long as it is a sheet-like material with a liquid-permeable structure such as non-woven fabric, woven fabric, perforated plastic sheet, or mesh sheet. As the material of woven fabric and non-woven fabric, either natural fiber or chemical fiber can be used.

The side sheet 12 can be selected from the same material as the surface sheet 11. However, in order to prevent menstrual blood from flowing out of the absorbent article 1 over the side sheet 12, it is desirable that the side sheet 12 has hydrophobicity or water repellency. The side sheet 12 is arranged on the outer edge of the absorber 30, the flap 3, and the hip flap 4.

The non-skin surface sheet 20 has approximately the same length as the length of the skin surface sheet 10. The non-skin surface sheet 20 is a polyethylene sheet that can be used; laminated non-woven fabric with polypropylene as the main body; air-permeable resin film; sheet in which air-permeable resin film is joined to non-woven fabric such as spunbond or water jet. .

The absorber 30 has an absorbent core 31 on which an absorbent material is laminated, and a core layer 32 covering the absorbent core 31. Examples of the absorbent material include hydrophilic fibers, pulp, and SAP. In addition, in the absorber 30 of the embodiment of this embodiment, the rear end edge of the absorbent core 31 and the rear end edge of the core layer 32 are substantially identical.

The absorbent core 31 is arranged in the excretion port abutting domain S1 and the rear domain S2. In addition, the absorbent core 31 may be divided into the excretion port abutting domain S1 and the rear side domain S2 and arranged in a state of being divided, or may be arranged across the excretion port abutting domain S1 and the rear side domain S2. Moreover, the absorbent core 31 only needs to be It suffices to be placed in the excretion port abutting domain S1 and the back domain S2, or may be disposed in the excretion port abutting domain S1, the back domain S2, and the front domain S3.

The absorbent core 31 has a mid-high portion 33 located on the inner side in the widthwise direction than the outer edge 31E of the absorbent core 31. The middle-high part 33 is located in the excretion opening contact area S1, and is located inside the widthwise direction than the outer edge 31E of the absorbent core 31 of the excretion opening contact area S1. The thickness of the middle-high part 33 is thicker than the thickness of the outer edge 31E of the absorbent core 31 in the excretion opening contact area S1. The basis weight of the absorbent material of the mid-high portion 33 is higher than the basis weight of the absorbent material of the outer edge 31E of the absorbent core 31 in the excretion opening contact area S1. The middle-high portion 33 is located on the rear side in the excretion opening abutment area S1 and is adjacent to the wide-sided slit 41. On the outer edge of the mid-high portion 33 of the present embodiment, a squeezing portion 80 that compresses the absorber 30 and the skin sheet 10 in the thickness direction is provided.

The absorbent core 31 has wide-side sipes 41, front and back sipes 42, and auxiliary sipes 43. The absorbent core 31 constitutes the wide side slit 41, the front and rear slits 42, and the auxiliary slit 43 so that the absorbent core 31 can be bent in the thickness direction T.

The basis weight of the absorbent material of the wide side slit 41, the front and rear slits 42, and the auxiliary slit 43 is lower than the basis weight of the absorbent material of the surrounding absorbent core 31. The surrounding absorbent core 31 refers to the absorbent core in the region adjacent to the wide-sided sipes, for example, the absorbent core adjacent to the wide-sided slit 41 in the excretion opening abutment area S1; and the rear side area S2 adjacent to the wide-sided sipe 41 absorbent core. In addition, the wide side slit 41, the front and rear slits 42, and the auxiliary slit 43 are only required to be the area where the basis weight of the absorbent material is lower than that of the surrounding absorbent core 31. The area with a basis weight of 0 can also be designed with a basis weight of 0, but an area where the absorbent material is mixed from the surrounding absorbent core 31 is arranged.

The wide-sided sipe 41, the front and rear sipes 42, and the auxiliary sipe 43 in the form of this embodiment have a design basis weight of zero. Therefore, in the thickness direction T, there is no space between the skin sheet 10 and the non-skin sheet 20 in the area overlapping the wide-sided sipe 41, the area overlapping the front and rear sipes 42, and the area overlapping the auxiliary sipe 43. Configure absorbent materials. In the thickness direction T, the skin sheet 10 and the non-skin sheet 20 are not joined in the area overlapping the wide-sided sipe 41, the area overlapping the front and rear sipes 42, and the area overlapping the auxiliary sipe 43.

In addition, in the area overlapped with the wide side slit 41, the area overlapped with the front and rear slits 42, and the area overlapped with the auxiliary slit 43, the core cladding layer 32 and the position on the skin facing side of the absorbent core 31 The core covering layer 32 on the non-skin surface side of the absorbent core 31 may be joined or not. For example, according to the structure in which the core covering layer 32 located on the skin facing surface side of the absorbent core 31 and the core covering layer 32 located on the non-skin facing surface side of the absorbent core 31 are joined, the distortion of the absorbent core 31 can be suppressed. In addition, in the area overlapping the wide side slit 41, the area overlapping the front and rear slits 42, and the area overlapping the auxiliary slit 43, the surface sheet 11 and the core cladding layer 32 may or may not be joined. . In addition, the non-skin surface sheet 20 and the core cladding layer 32 may also be joined in the area overlapping the wide side slit 41, the area overlapping the front and rear slits 42, and the area overlapping the auxiliary slit 43. It may not be joined.

Wide side slits 41, front and rear slits 42, and auxiliary slits 43 is the boundary of rigidity change. Specifically, for example, the rigidity of the area on the front side than the wide-sided sipe 41 is different from the rigidity of the area on the rear side of the wide-sided sipe 41. In more detail, the basis weight of the absorbent material in the area on the front side of the wide-sided sipe 41 is higher than the basis weight of the absorbent material of the wide-sided sipe 41. In addition, the basis weight of the absorbent material in the region behind the wide-sided sipe 41 is higher than the basis weight of the absorbent material of the wide-sided sipe 41.

The wide-side sipe 41 extends in the wide-side direction W between the excretion port abutting area S1 and the rear side area S2. The wide-side slit 41 may extend at least in the wide-side direction, and may be a straight line parallel to the wide-side direction, and may not be parallel to the wide-side direction but a straight line or a curved shape inclined with respect to the wide-side direction. The wide side sipe in the embodiment of the present embodiment has a curved shape in which the center of the wide side direction of the wide side sipe 41 protrudes toward the rear. In more detail, the center in the widthwise direction of the wide-sided sipe 41 is located more rearward than the outer edge of the wide-sided sipe 41. The center of the wide side slit 41 in the wide side direction is convex toward the rear. In addition, the length of the wide-side slit in the front-rear direction may be constant or variable. Moreover, the length of the front-rear direction of the wide-sided slit is 10 mm or more and 50 mm or less, and it is more desirable that the length of the front-rear direction of the wide-sided slit is 10 mm or more and 30 mm or less.

For example, when the length of the front-to-rear direction of the slat 41 is less than 10 mm, the movement of the front side of the slat 41 and the movement of the back of the slat 41 may not be sufficiently cushioned, or the separation may not be sufficiently obtained. The role of the situation. In addition, when the front-to-back length of the wide-sided slit 41 exceeds 50 mm, it will buffer the movement of the front side of the wide-sided slit 41 and the rear side of the wide-sided slit 41, or increase the breaking effect. , There will be Because the sense of security of absorbent articles is reduced.

In addition, it is desirable that the length of the wide side slit 41 in the wide side direction is 25 mm or more. Generally, the length in the widthwise direction of the mid-height part 33 of the sanitary napkin for night use (the length in the widthwise direction of the part with a relatively high basis weight) is often 25 mm or more and 30 mm or less. For example, if the middle-high part 33 is continuously formed in the excretion port contact area S1 and the rear side domain S2, the operation of the excretion port contact area S1 due to the middle and high part may be linked to the rear side area S2. However, by setting the width in the width direction of the wide side slit 41 to be 25 mm or more, the mid-high portion 33 is divided in the front-rear direction, so that the movement of the excretion port contact area S1 and the rear side area S2 can be suppressed from interlocking.

The wide-side slit 41 may be formed in the entirety of the wide-side direction of the absorbent core 31, or may be formed in a part of the wide-side direction of the absorbent core. The wide side slit 41 in the embodiment of this embodiment is formed in the entire widthwise direction of the absorbent core 31. The outer edge 41E of the wide side slit 41 is located at the outer edge 31E of the absorbent core 31. Therefore, the absorbent core 31 of the excretion opening abutting domain S1 and the absorbent core 31 of the rear domain S2 are divided by the wide slit 41 in the front-rear direction. In addition, in the absorber 30 of the embodiment of the present embodiment, the outer edge of the absorbent core 31 and the outer edge of the absorber 30 substantially coincide. Therefore, on the drawing, the outer edge 41E of the wide-sided sipe 41 is shown in a manner consistent with the outer edge of the absorber 30.

The front and rear slits 42 extend in the front-rear direction L in the rear side domain S2. The front and rear slits 42 may extend at least in the front-rear direction, and may be a straight line parallel to the front-rear direction, and may not be parallel to the front-rear direction but a straight line or a curved shape inclined with respect to the front-rear direction. 42 front and rear slits It may be formed in the entire area of the back-and-forth direction L of the absorbent core 31 of the back domain S2, or may be formed in a part of the area of the back-and-forth direction of the absorbent core 31 of the back domain S2. The front and rear slits 42 of the embodiment of the present embodiment are formed in the entire area in the front and rear direction L of the absorbent core of the back domain S2. Therefore, the absorbent core 31 of the rear domain S2 is divided by the front and rear slits 42 in the widthwise direction.

In addition, it is desirable that the front end edge of the front and rear slits 42 is located more rearward than the position from the center 3LC of the front and rear direction of the fin 3 to the rear of 30 mm. In addition, it is desirable that the rear end edge of the front and rear slits 42 is located more rearward than the position from the center 3LC of the front and rear direction of the fin 3 to the rear of 200 mm. The length of the front and rear slit 42 in the front and rear direction is preferably 150 mm or more. In the cross-section along the front and back direction of the wearer's body, the groove between the buttocks exists from the vicinity of the perineum to the coccyx. According to such front and rear sipes 42, the convex deformation of the apex of the front and back sipes is easily arranged in the groove between the buttocks.

In addition, the length of the widthwise direction of the front and rear slits 42 is 1 mm or more and 15 mm or less. For example, when the length of the front and rear slits 42 in the widthwise direction is less than 1 mm, when the front and rear slits 42 are convexly deformed at the apex, the absorbent cores 31 arranged with the wide side slits interfere with each other, making it difficult to stably Deformed into a convex shape. Also, when the length of the front and rear slits 42 in the widthwise direction exceeds 15 mm, when the convex deformed part with the apex of the front and rear slits 42 is arranged in the gap between the buttocks, the absorbent core does not exist in the convex deformed part. Therefore, there may be insufficient absorption of body fluids.

The absorbent core 31 of the back side domain S2 has a first area 311 and a second area 311 located outside the widthwise direction of the first area 311. Area 312 and third area 313. FIG. 1 shows the ranges of the first region 311, the second region 312, and the third region 313 in the widthwise direction. The first region 311, the second region 312, and the third region 313 are regions in which the absorbent core 31 of the rear side domain S2 is divided into 3 equal parts in the widthwise direction. The first area 311 is an area located at the center in the widthwise direction among the three equally divided areas. The second area 312 is an area located on the side of one side in the widthwise direction among the three equally divided areas. The third area 313 is an area located on the other side in the widthwise direction among the three equally divided areas. In addition, the structure in which the length in the widthwise direction of the absorbent core in the rear side domain S2 changes is a region in which the absorbent core 31 adjacent to the wide side slit 41 is divided into three equal parts in the widthwise direction.

The front and rear slits 42 are provided in the first area 311. The front and rear slits 42 may be arranged in the center of the widthwise direction W of the absorbent article 1. The front and rear slits 42 are configured so that the absorbent core 31 of the back domain S2 can be bent in the thickness direction T, and more specifically, the absorbent core 31 of the back domain S2 is configured to swell toward the wearer. The front and rear slits 42 constitute the first curved portion.

The wide side slit 41 is connected to the front and rear slits 42. Therefore, in a plan view, the excretion opening abuts the absorbent core 31 of the domain S1, the absorbent core 31 on one side in the widthwise direction W of the rear domain S2 (for example, the absorbent core positioned on the left side of the wearer), and the back The absorbent core 31 on the other side in the widthwise direction W of the side domain S2 (for example, the absorbent core positioned on the right side of the wearer) is divided. In addition, the wide side slit 41 and the front and rear slits 42 may also be separated.

The auxiliary slit 43 is connected to the front and rear slits 42, and used to The rear slit 42 extends outward in the widthwise direction W. The auxiliary slit 43 may extend at least in the widthwise direction, and may be a straight line parallel to the widthwise direction, and may not be parallel to the widthwise direction but a straight or curved shape inclined with respect to the widthwise direction. The auxiliary slits 43 extend toward both sides of the widthwise direction of the front and rear slits 42, respectively. The auxiliary slits 43 are provided in plural at intervals in the front-rear direction L. The outer edge 43E of the auxiliary slit 43 is positioned on the inner side in the widthwise direction W than the outer edge 31E of the absorbent core 31 of the back side domain S2. That is, on the outer side of the auxiliary slit 43 in the widthwise direction, an absorbent material is arranged. In addition, the auxiliary slit 43 may also extend to the outer edge 31E of the absorbent core 31 of the back side domain S2. The auxiliary slit 43 extends from the inner side in the width direction W (the front and rear slit 42 side) toward the outer side in the width direction W toward the front side.

The auxiliary slit 43 is configured to be a deformation base point at which the absorbent core 31 constituting the rear side domain S2 is bent in the thickness direction. The auxiliary slit 43 constitutes the second curved portion. In addition, the first curved portion and the second curved portion are not only composed of front and rear slits, but may also be composed of other structures. For example, the first curved part and the second curved part may be formed by at least a press part that squeezes the absorbent core in the thickness direction, or may be formed by regions with different rigidity due to the difference in the basis weight of the absorbent core from the surroundings. It can also be formed by embossing formed by the engagement of the concave portion and the convex portion.

The absorbent article is provided with at least a press part 80 that presses the absorbent core in the thickness direction. The press section 80 has a front press section 81, a rear press section 82, and a buttocks press section 83. The front squeezing part 81 is arranged in the excretion port contact area S1 and the front side area S3, and compresses and absorbs in the thickness direction. Body 30 and surface sheet 11. The front side squeezing part 81 extends in the front-rear direction on both outer sides of the width direction than the center in the width direction of the drain port contact area S1. The front end edge of the front press part 81 has a tapered shape of a wedge pin facing the front side.

The rear press section 82 is respectively arranged in the second region 312 and the third region 313 of the rear region S2, and compresses the absorber 30 and the surface sheet 11 in the thickness direction. The rear press section 82 is provided in the area where the absorbent core is arranged. The rear squeeze portion 82 extends in the front-rear direction L on both outer sides in the widthwise direction than the auxiliary sipe 43. The rear squeezing part 82 may be at least extended in the front-rear direction, and may be a straight line parallel to the front-rear direction, or not parallel to the front-rear direction but a curved shape inclined with respect to the front-rear direction. The rear squeeze portion 82 is positioned outside the auxiliary sipe 43 in the widthwise direction, and positioned inside the widthwise direction than the outer edge of the absorbent core. The rear press section 82 does not overlap the auxiliary sipe 43 in the thickness direction. In addition, the front side squeezing part 81 and the rear side squeezing part 82 only need to squeeze the absorbent core at least. The rear squeezing part 82 is formed by compressing the absorbent core 31 and the skin surface sheet (surface sheet 11) from the skin facing surface side T1 toward the non-skin facing surface side T2.

The hip wing press portion 83 is arranged in the rear side area S2, and compresses the side sheet 12 and the non-skin surface sheet 20 in the thickness direction. The hip wing press 83 is provided on the hip wing. The hip wing press portion 83 extends in the front-rear direction. The hip wing press portion 83 has a convex shape that protrudes outward in the width direction W.

The absorbent article 1 has wings 3 and hip wings 4. The fin 3 and the hip wing 4 are outside the absorbent core 31 of the excretory abutment domain S1. The side edge 31E further extends outward in the widthwise direction.

The flap 3 has a side sheet 12 and a non-skin surface sheet 20. The center 3LC in the front-rear direction of the fin 3 is arranged to face the drain port of the wearer. The flap 3 is configured to be folded toward the non-skin surface sheet 20 side, and is folded to the non-skin facing surface side of the crotch part of the underwear during use. The hip wing 4 is located on the back side of the wing piece 3 and is set in the back side domain S2. The hip wings 4 are configured to not be folded toward the non-skin facing side of the panties during use, and are arranged on the skin facing side of the panties. In addition, the fin 3 and the hip wing 4 may be provided with absorbent materials.

As shown in FIG. 2, the non-skin facing surface of the non-skin surface sheet 20 is provided with an adhesive area 60 to which an adhesive for fixing the underwear S to the absorbent article is applied. The adhesion area 60 has: a first body adhesion area 61 and a second body adhesion area 62 arranged on the non-skin facing surface side of the absorbent core 31; a flap adhesion area 63 arranged on the flap 3; and The hip wing adhesion area 64 is arranged on the hip wing 4.

The first body adhesion area 61 is separated from the second body adhesion area 62 in the front-rear direction, and is arranged in front of the second body adhesion area 62. The first body adhesion region 61 is arranged on the front side than the wide-sided sipe 41 across the excretion port abutting area S1 and the front side area S3. The second body adhesion region 62 is arranged on the rear side domain S2 on the rear side than the wide side slit 41.

The wide side slit 41 and the front and rear slits 42 do not overlap the adhesion area 60 in the thickness direction T. In other words, the adhesion area 60 is not provided in the area where the wide-sided sipe 41 and the front and rear sipes are arranged in a plan view. also, The wings 3 and the hip wings 4 are provided with adhesion areas 60.

The adhesion area 60 is covered by the peeling sheet 65 in the state before use. The peeling sheet 65 prevents the deterioration of the adhesive before use. The peeling sheet 65 is peeled off by the wearer during use. In addition, in absorbent articles that do not have a release sheet, it is also possible to constitute a case where the adhesive before use is prevented from deteriorating by the packaging sheets for packaging the absorbent articles.

The measurement of the "thickness of the absorber" in this manual is performed by the following measurement method.

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

The measurement position was set as the center part in the width direction of the absorber. At the time of measurement, the absorbent article is not in a shortened state, but is measured in a state where the stretchable member of the absorbent article is stretched. In addition, parts other than the absorber such as the skin sheet and non-skin sheet other than the absorber are removed. Using the dial indicator PEACOCK manufactured by Ozaki Manufacturing Co., Ltd., a diameter of 10mm is used on the gauge head, and a test piece of 30mm×30mm is prepared, and the thickness of the test piece is measured. The measuring device adjusts the measuring pressure relative to the test piece to 3 g/cm ² . Here, for 10 samples, the above-mentioned measurement is performed under various conditions, and the average value is used as the length.

In addition, the measurement of the "basis weight and density of the absorber" in this specification is performed by the following measurement method.

When an absorbent article 1 such as a package is enclosed, use it to take it out of the package, and in this state, at 20℃±2℃, relatively wet The samples are placed in an environment of 60%±5%RH for 12 hours.

The absorbent article packed in the packaging body is opened, the folded absorbent article is unfolded, and the thickness and area of the part of the basis weight and density are measured. Next, cut out the part for measuring basis weight and density from the absorbent article, and measure the weight of the cut part. Next, parts other than the absorber, such as the top sheet and the back sheet, were removed from the cut-out portion, and the weight of the absorber was measured. The basis weight is calculated from the weight of the absorbent body and the area of the part where the basis weight and density are measured. Calculate the density based on the basis weight and thickness.

In addition, the measurement of "length" in this manual is performed by the following measurement method.

When the absorbent article 1 such as a package is enclosed, use a sample taken out of the package and placed in an environment of 20°C±2°C and a relative humidity of 60%±5%RH for 12 hours in this state.

Next, using a spring gauge (belt: polyvinyl chloride coated with glass fiber) manufactured by Affinity Measurement Co., Ltd., the length of the measurement target part in this state was measured along the measurement target part. Here, for 10 samples, the above-mentioned measurement is performed under various conditions, and the average value is used as the length.

(2) Action‧Effect

In the absorbent article 1 of this embodiment, the front and rear slits 42 provided in the center of the widthwise direction of the rear side domain S2 are raised toward the wearer as the first curved portion. With the front and rear slits 42, the rear area S2 located behind the excretion opening contact area S1 allows the absorbent core 31 to fit between the wearer’s buttocks. gap. In addition, the absorbent article 1 of the present embodiment is formed by forming a deformation base point extending in the widthwise direction by the auxiliary slit 43 as the second curved portion. The absorbent core 31 of the back side domain S2 can be easily arranged along the curve of the body in the cross section along the front-rear direction L of the body by being able to deform the auxiliary slit 43 as a base point.

Fig. 4 is a cross-sectional view of a state where the absorbent article 1 is installed by the wearer. Fig. 4(a) is a cross-sectional view along the widthwise direction in the excretion port abutting domain S1, and Fig. 4(b) is a cross-sectional view along the widthwise direction in the rear side domain S2. Fig. 4(a) uses the B-B section of Fig. 1 as a reference, and Fig. 4(b) uses the C-C section of Fig. 1 as a reference. In Fig. 4, the line of the wearer's body is represented by a two-dot chain line. When the absorbent article 1 is used as a sanitary napkin, the absorbent article is caught in the underwear S, and the underwear is pulled up to wear. The size in the width direction of the absorbent core of general sanitary napkins is designed to be wider than the size in the width direction between the crotch of the wearer. Therefore, the excretion opening contact area S1 of the absorbent article 1 in the installed state receives the force from the outside in the widthwise direction toward the inside in the widthwise direction by being sandwiched between the legs of the installer.

The cross-sectional shape of the wearer's body along the widthwise direction W of the absorbent core 31 is different in the vicinity of the crotch and the vicinity of the buttocks. Specifically, the cross-sectional shape of the body along the widthwise direction near the vaginal opening of the wearer's crotch (near the vaginal opening where menstrual blood comes out) is such that the labia majora is more protruding than the base of the thigh, and it faces the absorbent article side Protruding convex shape. In the crotch area of the wearer, the excretion opening contact area S1 of the absorbent article is arranged to face each other. Absorbent article 1 is in the state of being installed in underwear S and used by the wearer Then, the absorbent core of the excretion opening abutting domain S1 is pushed down by the protrusion of the labia majora, and deformed to bulge toward the non-skin facing surface. Under the wearer's crotch, the absorbent core of the excretion port abutting domain S1 is arranged along the body, and leakage under the crotch can be suppressed.

In addition, the perineum, which is located behind the labia majora of the wearer, is located behind the anus and the groin. The cross-sectional shape of the body along the widthwise direction near the back of the perineum is a shape with a recessed center in the widthwise direction. The rear side domain S2 of the absorbent article is arranged to face the buttocks of the wearer. For example, sanitary napkins for night use are often used when lying on their back. Most of the leakage is when a large amount of menstrual blood is discharged at one time, and there is no time to absorb the menstrual blood directly under the vaginal opening. When the absorbent body located directly under the vaginal opening does not fit the body, the menstrual blood flows into the concave part of the buttocks. The menstrual blood is exposed along the body. If there is a gap between the body’s buttocks and the absorbent article, especially sanitary napkins used at night, there is a concern that menstrual blood flows along the body to the back side and leaks from the back of the absorbent article.

In the absorbent article of the form of this embodiment, the side part of the absorbent core 31 is pushed down by the right and left buttocks in the back side domain S2. Therefore, the lateral part of the widthwise direction of the absorbent core of the back domain requires more force than the center of the widthwise direction of the absorbent core 31 of the back domain. When the side portions of the absorbent core are pushed down by the right and left buttocks, the center of the widthwise direction of the absorbent body of the rear side domain swells toward the wearer's side with the front and rear slits as the apex. Therefore, the center of the widthwise direction of the absorbent core 31 of the rear domain S2 is easily arranged in the recess between the buttocks, and the absorbent core 31 is further arranged along the buttocks of the wearer. As a result, it can prevent The case where body fluids such as menstrual bleeding flow along the body to the back side and leak out from the back of the absorbent article.

Moreover, in the center of the widthwise direction of the absorbent core 31 of the back side domain S2, front and rear slits 42 are formed to penetrate through the thickness direction, and no absorbent material is substantially arranged. Therefore, the thickness of the raised part, especially the apex, becomes thinner. In addition, if an absorbent material is arranged in the front and rear slits 42, the absorbent core 31 is likely to be flat due to the rigidity of the absorbent material, and the absorbent core 31 is not easily bent at the base point of the front and rear slits 42. However, in the front and rear slits 42, because there is substantially no absorbent material, the absorbent core 31 can easily maintain the state of being bent with the front and rear slits 42 as a base point. Therefore, the absorbent article 1 can be arranged closer to the gap between the user's buttocks, and leakage in the buttocks can be suppressed.

Fig. 5 is a cross-sectional view of a state where the absorbent article 1 is installed by the wearer. Fig. 5 is a cross-sectional view taken along the front-rear direction L of the body along the A-A section shown in Fig. 1 as a reference. In Figure 5, the line of the wearer's body is represented by a two-dot chain line. In the absorbent article 1, a deformation base point extending in the widthwise direction is formed by the auxiliary slit 43. The absorbent core 31 of the back side domain S2 can be easily arranged along the curve of the body in the cross section along the front-rear direction L of the body by being able to deform the auxiliary slit 43 as a base point. In addition, when the absorbent core 31 of the back side domain S2 is attached along the front-rear direction of the body, the width of the auxiliary slit 43 is appropriately changed, and the absorbent core 31 adjacent in the front-rear direction is sandwiched between the auxiliary slit 43 The distance between changes. Therefore, it is easy to arrange the absorption core 31 along the curve of the body of the cross section along the front-back direction of the body.

The front and back slits 42 of the absorbent core 31 of the back side domain S2 serve as the top When the point is raised, the raised absorbent core 31 increases the bending rigidity in the front-rear direction L. Therefore, it may become difficult to arrange the absorbent core 31 along the front-rear direction L of the body. However, since the auxiliary slit 43 is provided, the rigidity of the absorbent core 31 is reduced by the auxiliary slit 43, and the deformation of the absorbent core 31 following the curve of the buttocks can be promoted.

In addition, when the outer edge 43E of the auxiliary slit 43 reaches the outer edge 31E of the absorbent core 31, the absorbent core 31 extends flat in the area from the center of the gap that abuts the buttocks to the outer edge of the absorbent core 31. The outer edge 31E may not cover the lateral side of the buttocks (cover the outside in the lateral direction than the apex of the buttocks). However, since the outer edge 43E of the auxiliary slit 43 is located on the inside in the widthwise direction than the outer edge 31E of the absorbent core 31, the absorbent core 31 does not break in the front-rear direction L. In addition, when deforming with the auxiliary slit 43 as a base point, the absorbent core 31 arranged on the outside in the width direction than the auxiliary slit 43 becomes a fulcrum. Therefore, when the absorbent core 31 deforms along the curve of the body along the front-rear direction L, it can be deformed in a state where the front-rear direction L is continuous. Therefore, the absorbent core 31 of the back side domain S2 easily becomes a cup shape which covers the side part of the buttocks, and can effectively suppress the leakage from the buttocks.

In addition, the front and rear slits 42 allow the absorbent core 31 of the rear domain S2 to be deformed on the left and the right, and the absorbent core 31 of the rear domain S2 can track the movement of the body on the left and right. For example, when the wearer is walking, the left and right feet are alternately moved. With the movement of this foot, the hips also move left and right alternately. For example, if the entire width of the absorbent core 31 of the back domain S2 is moved integrally in the width direction, the entire absorbent core 31 of the back domain S2 will be caused by foot crossing. The movement of the substitute moves left and right, and the fit in the buttocks may be unstable. However, the absorbent core 31 of the rear side domain S2 is divided left and right by the front and rear slits 42, whereby the absorbent core 31 sandwiching each of the front and rear slits 42 is moved in accordance with the alternate movement of the foot. Therefore, by allowing the one side absorbent core 31 sandwiching the front and rear slits 42 to follow the movement of the body, the other side absorbent core 31 can be continuously attached to the body. Furthermore, by stabilizing the absorbent core of the back side domain S2 and making it adhere to the buttocks continuously, friction between the wearer's buttocks and the absorbent article is suppressed, and deterioration of the wearing feeling caused by friction on the skin can be suppressed.

The absorbent core 31 may be provided with a wide side slit 41 extending in the wide side direction W between the excretion opening abutting region S1 and the rear side region S2. Since the wide-sided slit 41 is provided between the excretion opening abutment domain S1 and the rear side domain S2, the wide-sided slit 41 prevents the deformation of the absorbent core 31 from spreading to the entire front and rear direction of the absorbent core 31, allowing The absorbent core 31 of the excretion abutment domain S1 and the absorbent core 31 of the rear domain S2 deform in different ways.

As described above, the cross-sectional shape of the wearer's body along the widthwise direction W of the absorbent core 31 is different in the vicinity of the crotch and the vicinity of the buttocks. The absorbent core 31 of the excretion opening contact area S1 is pushed down by the protrusion of the wearer's labia majora and deformed to bulge toward the non-skin facing surface side. The deformation of the absorbent core 31 of the excretion opening abutting domain S1 propagates to the rear in the region reaching the wide-sided sipe 41. However, the deformation of the absorbent core of the excretion opening abutting domain S1 is not easily propagated to the absorbent core 31 of the rear domain S2 because the wide-sided sipe 41 is broken. The absorbent core 31 of the back domain S2 is raised toward the wearer's side, and is arranged in the gap between the right and left buttocks. Therefore, on the wearer’s buttocks, the absorbent core 31 of the rear domain S2 is The body is configured to suppress leakage of the hips.

A plurality of auxiliary slits 43 may be provided at intervals in the front-rear direction L. The cross-sectional shape of the wearer's body in the front-rear direction is a curved shape. By forming a plurality of auxiliary slits 43 in the absorbent core 31 of the back domain S2, the absorbent core 31 of the back domain S2 is easily deformed with the plurality of auxiliary slits 43 separated in the front-rear direction L as a base point. Therefore, the absorbent core 31 of the back side domain S2 is arranged so as to fit along the curve of the body and the gap between the buttocks.

In addition, in the absorbent core 31 of the present embodiment, as shown in FIG. 3, a first auxiliary sipe 431, a second auxiliary sipe 432, a third auxiliary sipe 433, and a fourth auxiliary sipe 434 are provided from the front side. . The second auxiliary slit 432 is pressed by the buttocks when sleeping on the back, and it is easy to maintain the flat state. The second auxiliary slit 432 breaks the force pressed by the buttocks, and the first auxiliary slit 431 on the front side than the second auxiliary slit 432 can be arranged along the bulge between the buttocks and the root of the foot. In addition, the third auxiliary slit 433 is in a state other than a sleeping posture (for example, a standing posture), and is arranged at a position that abuts on the buttocks whose curved shape changes greatly when viewed from the side of the body. The absorbent core 31 is easily deformed with the third auxiliary slit 433 as a base point, and the absorbent core 31 can be arranged along the portion contacting the buttocks whose curved shape is greatly bent.

In addition, the first auxiliary slit 431 and the fourth auxiliary slit 434 are arranged at positions that abut on the crease when the absorbent article is folded based on the crease along the widthwise direction. Since the auxiliary slit 43 is arranged at the position where the crease is abutted, the rigidity is reduced by the auxiliary slit 43, and the folding can be stably Stack absorbent articles. In addition, when the absorbent article is unfolded (used), it is not easy to be stained with the folding habit caused by the crease, so the absorbent article can be easily deformed in the expected state. Specifically, it is easy to fit the absorbent article to the gap between the buttocks and arrange it. Furthermore, for example, in the crease of the absorbent article, there is no structure such as auxiliary slits, and the absorbent core in the rear region has a relatively strong folding habit extending in the widthwise direction. Therefore, the absorbent article is not easy to be softly attached from the abdominal side to the back side of the body, and leakage is likely to occur due to the gap between the body and the absorbent article. On the other hand, by providing auxiliary slits 43 on the creases of the absorbent article, the folding habit is not easy to remain, and the position of the auxiliary slits 43 allows the absorbent article to fit the body.

The auxiliary slit 43 may extend from the front and rear slits 42 toward the outside in the widthwise direction toward the front side. Since the absorbent core 31 of the back domain S2 is pressed by the buttocks to the rear side than the front side, the force is applied from the back side to the front side. Since the auxiliary slit 43 extends from the front and rear slits 42 toward the outside in the widthwise direction, the more forward it is. Therefore, the auxiliary slit 43 can distribute the force from the rear to the front to the outside in the widthwise direction. Front side. The auxiliary slit 43 disperses the force from the rear to the front side, and easily deforms according to the force, and the absorbent core 31 can be further arranged along the buttocks.

It is not necessary to arrange the absorbent material between the skin surface sheet 10 and the non-skin surface sheet 20 in the region overlapping the front and rear slits 42 in the thickness direction. Since no absorbent material is arranged in the area overlapping the front and rear slits 42, the thickness of the apex raised by the front and rear slits 42 is changed to be thinner. Therefore, the absorbent article can be more closely fitted to the gap between the wearer’s buttocks. Position to prevent leakage in the buttocks.

The front and rear slits 42 may not overlap the adhesion area 60 in the thickness direction T. Since the front and rear slits 42 do not overlap the adhesion area in the thickness direction, the deformation of the front and rear slits 42 is prevented from being excessively hindered by the underwear, and the absorbent core 31 is easily deformed.

The rear region S2 may be provided with hip wings 4 that extend outward in the widthwise direction than the outer edge 31E of the absorbent core 31 of the excretion opening abutting region S1. By providing the hip wings 4 in the back side domain S2, not only the side portions (the second area and the third area) of the core 31 are absorbed during installation, but the hip wings 4 can be pressed down. Therefore, the front and rear slits 42 of the absorbent core 31 are more likely to swell up as the apex. Therefore, arranging the absorbent core 31 along the wearer's buttocks makes it easier to obtain the effect of suppressing leakage in the buttocks.

The hip wing 4 may be provided with a convex-shaped hip wing squeezing portion 83 protruding outward in the widthwise direction W. By providing the hip wing pressing part 83, the hip wings 4 are easily deformed along the curve of the buttocks, and the hip wings 4 can be arranged to cover the curve of the buttocks. Therefore, leakage in the buttocks can be further suppressed.

The excretion opening abutting domain S1 may have a mid-high portion 33 located on the inner side in the widthwise direction than the outer edge 31E of the absorbent core 31. By providing the middle-high portion 33 in the excretion opening contact area S1, the center of the excretion opening contact area S1 in the width direction (the inner side in the wider direction than the outer edge 31E of the absorbent core 31) makes it easy to tighten the absorbent core Attached to the installer. Therefore, the cross-sectional view as shown in FIG. 4(a) can improve the adhesion in the excretion opening abutting region S1. As a result, the adhesiveness of the absorbent article in the back domain S2 and the adhesiveness of the absorbent article in the excretion opening contact area S1 can be realized.

(3) Other implementation forms

Although the absorbent article of the present embodiment is a sanitary napkin for night use attached to underpants, in other embodiments, it can also be attached to absorbent pads such as urine-absorbent pads of paper diapers.

In addition, although the wide-sided sipe 41, the front and rear sipes 42, and the auxiliary sipe 43 in the form of the present embodiment have a basis weight of 0, the wide-sided sipe 41, the front and rear sipes 42, and the auxiliary sipe 43 , It can also be a low basis weight area with a lower basis weight than the surrounding absorbent core. In addition, the auxiliary slit 43 may extend at least in the widthwise direction, or may be curved, may have a rhombus shape in a plan view, or may be an inverted triangle shape in a plan view (with a vertex facing the rear side). shape).

As mentioned above, although the present invention has been described in detail using the above-mentioned embodiments, it is obvious to the industry that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as a modified and changed aspect without departing from the meaning and scope of the present invention established by the description of the scope of patent application. Therefore, the description in this specification is for the purpose of illustration and does not have any meaning to limit the present invention.

In addition, the entire contents of the Japanese Patent Application No. 2014-260773 filed on December 24, 2014 are incorporated into this specification by reference.

[Industrial availability]

According to the present invention, it is possible to provide a kind of An absorbent article that fits the wearer’s buttocks to prevent leakage.

1‧‧‧Absorbent articles

3‧‧‧wing piece

3LC‧‧‧The center of the front and rear direction

4‧‧‧Hip Wings

10‧‧‧Skin face sheet

11‧‧‧Surface sheet

12‧‧‧Side sheet

30‧‧‧Absorber

31E‧‧‧Outer edge of absorbent core

311‧‧‧Region 1

312‧‧‧Section 2

313‧‧‧Region 3

33‧‧‧Middle and High

41‧‧‧Wide side slit

41E‧‧‧Outer edge

42‧‧‧Front and rear slits (Part 1)

43E‧‧‧Outer edge

43‧‧‧Auxiliary slit (Part 2)

80‧‧‧Press section

81‧‧‧Exhaust press section

82‧‧‧Rear press section

83‧‧‧Hip Wing Press

L‧‧‧Front and back direction

W‧‧‧Wide side direction

Claims (10)

An absorbent article having: an excretion opening abutting area opposed to the excretion opening of a wearer; a rear area located behind the excretion abutting area; and arranged in the excretion abutting area The absorbent article with the absorbent core of the aforementioned back domain is characterized in that the absorbent core of the aforementioned back domain is provided with: arranged in the center of the widthwise direction of the absorbent core and extending in the front-rear direction of the absorbent And the second curved portion that is connected to the front and rear slits and extends from the front and rear slits to the outside in the widthwise direction. The outer edge of the second curved portion is greater than the back side of the The outer edge of the absorbent core is further positioned on the inner side of the widthwise direction, and the second curved portion is formed by a squeezing portion that squeezes the absorbent core in the thickness direction, and is inclined and extends in the widthwise direction. The absorbent article described in the first item of the scope of patent application, wherein the outer edge of the second curved portion is located on the inner side of the width direction than the outer edge of the absorbent core of the back domain, and is more The second curved part is closer to the outside in the widthwise direction, and closer to the inside in the widthwise direction than the outer edge of the absorbent core, and is provided with a rear press part that presses the absorbent core in the thickness direction and Extend in the front and rear direction. The absorbent article described in claim 1 or 2, wherein the absorbent core is provided with a width extending in the widthwise direction of the absorbent article between the excretory opening contact area and the back side area. Side slits. For the absorbent article described in item 1 or item 2 of the scope of patent application, the aforementioned second curved portion is provided in plural at intervals in the front-rear direction. The absorbent article as described in claim 1 or 2, wherein the second curved portion extends from the first curved portion toward the outside in the widthwise direction to the front side. The absorbent article as described in item 1 or item 2 of the scope of patent application, which has: a skin surface sheet located on the side facing the skin than the absorbent core; and located on the non-skin facing side than the absorbent core. In the non-skin surface sheet, no absorbent material is arranged between the skin surface sheet and the non-skin surface sheet overlapped in the area of the front and rear slits. The absorbent article described in item 1 or item 2 of the scope of patent application, wherein a non-skin surface sheet located on the non-skin facing surface side of the aforementioned absorbent core is provided on the non-skin facing surface of the non-skin surface sheet The surface is provided with an adhesive area coated with an adhesive for fixing the absorbent article to underwear, and the front and rear slits do not overlap the adhesive area in the thickness direction. The absorbent article as described in item 1 or item 2 of the scope of the patent application, wherein the rear region is provided with an outer edge of the absorbent core that extends in the widthwise direction than the outer edge of the absorbent core of the excretory opening contact region Hip wings. The absorbent article described in item 8 of the scope of patent application, wherein the hip wings are provided with a convex shape protruding outward in the widthwise direction Hip wing press. The absorbent article described in item 1 or item 2 of the scope of the patent application, wherein the excretion opening abutting domain has a mid-height portion located inside the widthwise direction than the outer edge of the absorbent core, and the mid-height portion The thickness of is thicker than the thickness of the outer edge of the absorbent core in the excretion opening abutment area.

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