TWI674093B - Absorbent article - Google Patents

Abstract

Provides an absorbent article capable of improving rolled-up hip flaps. The absorbent article (1) has a front-back direction (L) and a width direction (W) orthogonal to each other, a central area (S1) arranged under the user's crotch, and The rear region (S3) is provided with a hip flap (4) bulging outward in the width direction (W) in the rear region (S3), and the outer edge (4E) of the hip flap (4) is formed to have The wavy shape of the plurality of convex portions (4F) is further inside than an imaginary line (IL) obtained by connecting the foot portions of the respective convex portions (4F), and a press portion (85) is formed along the imaginary line (IL). .

Description

Absorbent article

The present invention relates to absorbent articles such as sanitary napkins.

Absorptive articles such as sanitary napkins are known to have a hip flap. Patent Document 1 discloses a tampon having a hip flap. The hip flaps are formed on the part where the user's hips touch. The buttocks flaps protrude significantly outward in the width direction of the absorbent article. There are two to five convex and concave curves along the outline of the hip flap. In addition, embossing is formed along the outline of the hip flap. When drawing an imaginary curve passing through the bottom of the concave curve, the embossing is also arranged in a region further outside than the imaginary curve.

[Leading technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2014-144140

The edges of the hip flaps of an absorbent article sometimes follow Roll up with the user's actions. In particular, when there is a concave-convex curve at the edge of the hip flap, the edge of the hip flap is easily rolled up. The user feels uncomfortable when the edges of the hip flaps are rolled up. Therefore, it is desired to improve the roll-up of such an absorbent article.

The present invention has been developed in view of the above-mentioned problems, and an object thereof is to provide an absorbent article capable of improving the roll-up of a hip flap of an absorbent article.

The absorbent article of the present invention includes a front-rear direction and a width direction orthogonal to each other, a central region arranged under a user's crotch, and a rear region located on a rear side of the central region, and is provided in the rear region. There are buttocks bulging outward in the width direction, and the outer edge of the buttocks is formed into a wavy shape having a plurality of convex portions, and is more than an imaginary line obtained by connecting the foot portions of the convex portions. Inside, a press section is formed along the imaginary line.

1‧‧‧ absorbent article

4‧‧‧ hip flap

4E‧‧‧ The outer edge of the hip flap

4F‧‧‧ convex

10‧‧‧ skin sheet

11‧‧‧ surface sheet

12‧‧‧side sheet

20‧‧‧ non-skin face sheet

30‧‧‧ Absorber

31‧‧‧ Absorbent core

31E‧‧‧Outer edge

32‧‧‧ core cladding

33‧‧‧ Middle and High School

41‧‧‧Width gap

42‧‧‧Gap

43‧‧‧Auxiliary gap

61‧‧‧The first main body adhesion area

62‧‧‧Second main body adhesion area

63‧‧‧Wing adhesion area

64‧‧‧ Adhesive area of hip flaps

81‧‧‧ Front press section

82‧‧‧Long press section

84‧‧‧ Rear press section

85‧‧‧The first press section

86‧‧‧The third press section

87‧‧‧Second press section

L‧‧‧ forward and backward

T‧‧‧thickness direction

T1‧‧‧Side-facing side

T2‧‧‧ Non-skin facing side

W‧‧‧Width direction

S1‧‧‧Central area

S2‧‧‧ Front side area

S3‧‧‧ rear area

CL‧‧‧ Centerline

IL‧‧‧imaginary line

Fig. 1 is a plan view of an absorbent article according to an embodiment.

FIG. 2 is a plan view of the absorbent article viewed from the side opposite to FIG. 1.

3 is a cross-sectional view of the absorbent article taken along the line 3A-3A of FIG. 1.

Fig. 4 is an enlarged plan view of a part of a hip flap.

Fig. 5 is a plan view of an absorbent article according to another embodiment.

Fig. 6 is the absorptive property shown in Fig. 5 folded along a fold line in the front-rear direction. Top view of the item.

Hereinafter, the absorbent article according to the embodiment will be described with reference to the drawings. The absorbent article may be any absorbent article such as a sanitary pad (folded sheet), a sanitary napkin, and an incontinence pad. In the following embodiments, as an example of an absorbent article, a disposable sanitary napkin is described.

In the descriptions shown below, the same or similar parts are denoted by the same or similar symbols. However, the diagram is a schematic diagram, and it should be noted that the proportions and the like of each dimension are different from the real thing. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships or ratios.

(1) The overall structure of an absorbent article

Fig. 1 is a plan view of an absorbent article according to an embodiment. FIG. 2 is a plan view of the absorbent article viewed from the side opposite to FIG. 1. 3 is a cross-sectional view of the absorbent article taken along the line 3A-3A of FIG. 1.

The absorbent article 1 has a front-back direction L extending toward the front side (ventral side) and a rear side (back side) of the user, a width direction W orthogonal to the front-back direction L, and a surface facing from the user's skin The side T1 extends in the thickness direction T extending to the non-skin facing surface side T2. In use, the skin-facing surface side T1 corresponds to the side facing the skin of the wearer. The non-skin-facing surface side T2 corresponds to the side opposite to the skin-facing surface side T1.

The absorbent article 1 has a central region S1 and a front region S2 And the rear region S3. The central area S1 is located in an area abutting the excretory opening (for example, the vaginal opening) of the wearer. In a state in which the absorbent article is installed in the underpants, the central region S1 is located in a region at the lower part of the panties of the underpants. That is, the central area is an area disposed between the feet of the user, that is, between the feet of the user. The front side area S2 is located more forward than the center area S1. The rear region S3 is located further to the rear than the central region S1. The length of the front-rear direction L of the rear region S3 may be longer than the length of the front-rear direction L of the central region S1.

The central region S1 may be provided with a wing portion 3 described later. In this case, the central region S1 can be said to be a region where the wings 3 are provided in the front-rear direction L. In addition, the rear side region S3 may be provided with a buttocks flap 4 bulging outward in the width direction W.

A width slit 41 to be described later may be provided at a boundary between the central region S1 and the rear region S3. In this case, the front edge of the width slit 41 may specify the rear edge of the central region S1, and the rear edge of the width slit 41 may specify the front edge of the rear region S3.

The rear edge of the rear region S3 defines the rear edge of the absorbent article 1. The boundary between the central region S1 and the front side region S2 corresponds to the leading edge of the wing portion 3. The front end edge of the wing portion 3 is the root of the wing portion 3 and is a portion located on the front side of the two innermost portions recessed in the width direction W of the wing portion 3. The root on the front side of the wings 3 may also be located at the boundary between the central region S1 and the front region S2. The front edge of the front region S2 defines the front edge of the absorbent article 1.

The absorbent article 1 has a skin-side sheet 10, and a non-skin surface Sheet 20 and absorber 30. The skin surface sheet 10 is provided closer to the skin-facing surface side T1 than the absorber 30. The non-skin surface sheet 20 is provided closer to the non-skin facing surface side T2 than the absorber 30. The absorber 30 is provided between the skin surface sheet 10 and the non-skin surface sheet 20.

The skin sheet 10 may include a surface sheet 11 and a side sheet 12. The surface sheet 11 is a liquid-permeable sheet that allows a liquid such as a body fluid to pass therethrough. The surface sheet 11 covers the center of at least the width direction W of the absorber 30. The surface sheet 11 may extend in the front-rear direction L from the front-side area S2 to the rear-side area S3. The side sheet 12 covers the outer edge (outer end of the width direction W) of the surface sheet 11, and extends more outward than the surface sheet 11 in the width direction W. In addition, in the present embodiment, the absorbent article 1 includes the side sheet 12, but the absorbent article 1 may not include the side sheet 12. In this case, the surface sheet 11 may cover the entire absorbent body 30.

The surface sheet 11 is composed of any sheet-like material having a structure that allows liquid to pass through, such as a non-woven fabric, a woven fabric, a perforated plastic sheet, a mesh sheet, and the like. Both woven and non-woven materials can be natural fibers or chemical fibers.

The side sheet 12 can be selected from the same material as the surface sheet 11. However, in order to prevent the body fluid from flowing out of the absorbent article 1 beyond the side sheet 12, the side sheet 12 is preferably hydrophobic or water-repellent. The side sheet 12 is arranged on the outer edge of the absorber 30, the wings 3, and the hip flaps 4.

The non-skin sheet 20 is a liquid-impermeable sheet. The non-skin surface sheet 20 may be a laminate mainly composed of a polyethylene sheet, polypropylene, or the like. Non-woven fabrics, air-permeable resin films, sheets having air-permeable resin films bonded to non-woven fabrics such as spunbond, or high water-jet networks.

The absorbent body 30 includes an absorbent core 31 laminated with an absorbent material, and a core cladding layer 32 covering the absorbent core 31. The absorbent material may be formed of, for example, hydrophilic fibers, pulp, and SAP.

The absorbent core 31 is arranged at least in the central region S1 and the rear region S3. In addition, the absorbent core 31 may be individually disposed in each of the central region S1 and the rear region S3, or may be integrally disposed across the central region S1 and the rear region S3. In addition, the absorbent core 31 may extend from the central region S1 to the front region S2.

The absorbent core 31 has a middle-high portion 33 located on the inner side in the width direction W than the outer edge 31E of the absorbent core 31. The thickness of the mid-high portion 33 of the absorbent core is thicker than the thickness of the absorbent core around the mid-high portion 33. The mid-high portion 33 may be located in the central area S1. The basis weight of the absorbent material in the mid-high portion 33 may be higher than the basis weight of the absorbent material in the outer edge 31E of the absorbent core 31 located in the central region S1. The middle high portion 33 may also be located on the rear side in the central region S1 and adjacent to the width slit 41.

As described above, the absorbent article 1 includes the wings 3 and the hip flaps 4. The wings 3 and the hip flaps 4 may extend outward in the width direction W than the outer edge 31E of the absorbent core 31 in the central region S1.

The wings 3 may have a side sheet 12 and a non-skin face sheet 20. The center of the wing portion 3 in the front-rear direction L faces the excretory opening of the user. The wings 3 are configured to be folded back to the non-skin surface sheet 20 side. The wings 3 are turned back toward the non-skin-facing side of the lower part of the panties during use.

The buttocks flap 4 is located further to the rear than the wings 3 and is provided in the rear region S3. The hip flap 4 is not folded back during use, and is arranged between the panties and the hips of the wearer. In the present embodiment, the hip flap 4 is not provided with an absorbent material. Instead, an absorbent material may be provided on the hip flap 4.

The outer edge 4E of the hip flap may be formed in a wave shape having a plurality of convex portions 4F (see also FIG. 4). FIG. 4 is an enlarged view of a region R4 shown in FIG. 2, and is an enlarged plan view of a part of the hip flap 4. The plurality of convex portions 4F preferably extend from the outer edge 4E of one hip flap 4 through the rear edge of the rear region S3 to the outer edge 4E of the other hip flap 4. Instead, the plurality of convex portions 4F may be formed only on the outer edges 4E of the pair of hip flaps 4. The width W1 of each convex portion 4F is preferably 20 mm or less, and more preferably 10 mm or less. The width W1 of each convex portion 4F is preferably 3 mm or more.

The width of the hip flap 4 in the width direction W of the absorbent article 1 in a region on the front side from the position P1 of the maximum width of the hip flap 4 can be substantially increased from the front side to the rear side. Specifically, regardless of the shape of the convex portion 4F of the outer edge 4E of the buttock flap, the entire shape of the buttock flap 4 follows the area on the front side than the position P1 of the maximum width of the buttock flap 4 It is better to increase from the front side to the rear side. More specifically, an imaginary line IL obtained by connecting the foot portions of the convex portions 4F formed on the outer edge 4E of the hip flap 4 in a region closer to the front side than the position P1 of the maximum width of the hip flap 4, It can swell monotonously toward the outside of the width direction W from the front side to the rear side.

Furthermore, in a region further to the rear than the position P1 of the maximum width of the hip flap 4, the width of the hip flap 4 in the width direction W of the absorbent article 1 can be substantially reduced as it goes from the front side to the rear side. Instead, the width of the hip flaps 4 in the width direction W of the absorbent article 1 in a region closer to the rear side than the adhesive region 64 to be described later becomes substantially smaller as it moves from the front side to the rear side. Specifically, regardless of the shape of the convex portion 4F of the outer edge 4E of the buttock flap, the entire shape of the buttock flap 4 can be monotonously changed from the front side to the rear side in the region further to the rear side than the adhesion region 64. Narrowed. More specifically, an imaginary line IL obtained by connecting the foot portions of the convex portions 4F formed on the outer edge 4E of the hip flap 4 in a region further to the rear than the adhesive region 64 is drawn from the front side to the rear side. On the other hand, it narrows monotonically toward the inside of the width direction W. In addition, the position P1 of the maximum width of the buttocks flap is located further to the rear than the center of the rear region S3 in the front-back direction L.

The hip flap 4 may have a side sheet 12 and a non-skin face sheet 20. Instead, the hip flap 4 may not have the side sheet 12. In this case, it suffices that the surface sheet 11 extends to the region of the hip flap 4. In this case, a region in which the plurality of convex portions 4F are formed can be configured by the same number of sheets.

(2) the gap of the absorbent core

The absorbent core 31 may have a width slit 41, a front-rear slit 42, and an auxiliary slit 43. The width slit 41, the front-rear slit 42, and the auxiliary slit 43 are formed so that the absorber 30 can be bent in the thickness direction T.

Width slit 41, front and rear slits 42 and auxiliary slits 43 The basis weight of the absorbent material is lower than the basis weight of the absorbent material of the absorbent core 31 around the slits 41, 42, 43. In addition, the width slit 41, the front and rear slits 42, and the auxiliary slit 43 may be regions where the basis weight of the absorbent material is 0, that is, regions where no absorbent material is provided.

The width slit 41, the front-rear slit 42, and the auxiliary slit 43 are boundaries where the rigidity of the absorbent article 1 changes. For example, the rigidity of a region closer to the front than the width slit 41 may be different from the rigidity of a region closer to the rear than the width slit 41. More specifically, the basis weight of the absorbent material in a region closer to the front side than the width slit 41 may be higher than the basis weight of the absorbent material in the width slit 41. In addition, the basis weight of the absorbent material in a region closer to the rear side than the width slit 41 may be higher than the basis weight of the absorption material in the width slit 41.

The width slit 41 extends between the central region S1 and the rear region S3 and extends in the width direction W. The width slit 41 only needs to extend at least in the width direction W. The width slit 41 may extend parallel and linearly to the width direction W, and may also extend obliquely to the width direction W and extend straight or curved.

The width slit 41 of this embodiment is a curved shape in which the center of the width direction W of the width slit 41 projects rearward. More specifically, the center of the width direction W of the width slit 41 is located further behind the outer edge of the width slit 41. The length of the width slit 41 in the front-rear direction L may be fixed or may be changed. The length of the width slit 41 in the front-rear direction L at the position passing the center line CL of the center of the width direction W of the absorbent article is preferably 10 mm or more and 50 mm or less, and more preferably 10 mm or more and 30 mm or less. Thereby, the width of the absorbent body 30 in the gap The 41 point is easily bent along the skin of the wearer, and the absorbent body 30 can be put on the skin of the wearer.

The width direction length of the width slit 41 is preferably 25 mm or more. Thereby, it is possible to suppress the movement of the central region S1 of the absorbent article 1 to the rear region S3.

The width slit 41 may extend from one end in the width direction W of the absorbent core 31 to the other end. In this case, the outer edge of the width direction W of the width slit 41 is located on the outer edge 31E of the absorbent core 31. As a result, the absorbent core 31 in the central region S1 is separated from the absorbent core 31 in the rear region S3 by the width slit 41. Instead, the width slit 41 may cross the center line CL and partially extend toward the width direction W of the absorbent core 31.

In the rear region S3, the front-rear slit 42 extends in the front-rear direction L along the center line CL of the absorbent article. The front-rear slit 42 may extend parallel and straight to the front-rear direction L, and may also be inclined to the front-rear direction L and extend straight or curved along the center line CL.

The front-rear slit 42 may be formed in the entire area of the front-rear direction L of the absorbent core 31 in the rear-side region S3. Instead, the front-rear slit 42 may be formed in a part of the front-rear direction of the absorbent core 31 in the rear region S3.

The front end edge of the front-rear slit 42 is preferably located at a rear distance of 30 mm or more from the center of the front-rear direction L of the wing portion 3. The rear end edge of the front-rear slit 42 is preferably located at a rear distance of 200 mm or more from the center of the front-rear direction L of the wing portion 3. The length of the front-back direction L of the front-back slit 42 is preferably 150 mm or more. In the section along the front-rear direction L of the wearer's body, the grooves between the buttocks (the buttocks) exist behind the perineum Square to the area of the coccyx. The front and rear slits 42 make the absorber 30 easily deform into a convex shape with the front and rear slits as apexes. In other words, the absorbent body 30 easily becomes a groove that fits between the hips.

The length of the width direction W of the front-rear slit 42 is preferably 1 mm or more and 15 mm or less. Thereby, the absorber 30 can be easily transformed into the groove which fits between hips.

The front and rear slits 42 may be connected to the width slits 41. In this case, in a plan view, the absorbent core 31 in the central region S1, the absorbent core 31 on one side in the width direction W of the rear region S3, and the absorbent core 31 on the other side in the width direction W of the rear region S3. Is separated. Instead, the front and rear slits 42 may be separated from the width slits 41.

The auxiliary slit 43 is connected to the front and rear slits 42, and extends from the front and rear slits 42 to the outside in the width direction W. The auxiliary slit 43 only needs to extend at least in the width direction W. The auxiliary slit 43 may be formed parallel and linearly in the width direction W, or may be formed obliquely and linearly or curvedly in the width direction W. The auxiliary slit 43 is preferably inclined toward the front side from the inside to the outside in the width direction W. The auxiliary slits 43 extend toward both sides in the width direction W of the front and rear slits 42, respectively. A plurality of auxiliary slits 43 are provided in the front-rear direction L at intervals.

The outer edge of the auxiliary slit 43 in the width direction W is located more inward than the outer edge of the absorbent core 31 in the rear region S3. That is, an absorbing material is provided on the outer side in the width direction of the auxiliary slit 43. Instead, the auxiliary slit 43 may extend to the outer edge of the absorbent core 31 in the rear region S3.

The auxiliary slit 43 constitutes the absorber 30 in the rear region S3 in Deformation base point bent in the thickness direction T. That is, the absorbent article 1 is easily bent at the place where the auxiliary slit 43 is tied. Thereby, when the absorbent article 1 is mounted on a user, the absorbent body 30 becomes easier to fit on the curved hips of the user.

(3) Press section

The absorbent article 1 has a press section which is formed by pressing at least the absorbent core 31 in the thickness direction T. The press section may include a front press section 81, an elongated press section 82, and a pair of rear press sections 84.

The front-side pressing part 81 is provided in the center area S1 and the front-side area S2. The front-side pressing part 81 can be formed by compressing the absorber 30 and the surface sheet 11 in the thickness direction T. The front-side press part 81 has a part along the front-back direction L provided in the width direction W both sides of the middle-high part 33. The front-side press part 81 may define the side edges on both sides in the width direction W of the middle-high part 33.

The front-side pressing portion 81 is bent in the width direction near the front end edge of the absorbent core 31 and is continuously connected in a U-shape. Instead, the front-side pressing portions 81 may be individually provided on both sides in the width direction W of the middle-high portion 33. In other words, the pair of front-side pressing portions 81 may be provided individually by being separated from each other.

The long press section 82 is tied to the rear region S3 and is provided on both sides with the center line CL interposed therebetween. The elongated pressing portion 82 may be formed more forward than the position P1 of the maximum width of the hip flap 4. The long press portion 82 can be formed by compressing the absorbent body 30 and the surface sheet 11 in the thickness direction. Elongated pressure The pressing portion 82 extends on both outer sides in the width direction W than the auxiliary slit 43 and extends in the front-rear direction L. The elongated pressing portion 82 may be linear or dotted, and may extend at least in the front-rear direction L. The elongated pressing portion 82 may extend parallel and straight in the front-rear direction L, or may extend obliquely and curvedly in the front-rear direction L.

The pair of rear-side pressing portions 84 are tied to the rear-side area S3 and are provided on both sides with the center line CL interposed therebetween. The rear side pressing part 84 can be formed by compressing the absorber 30 and the surface sheet 11 in the thickness direction. The pair of rear-side pressing portions 84 are separated from each other with the center line CL passing through the center of the width direction W of the absorbent article. The pair of rear-side pressing portions 84 are positioned further to the rear than the position P1 of the maximum width of the hip flap 4 in the width direction W. Preferably, the pair of rear-side pressing portions 84 are located near the rear end of the rear-side area S3. Specifically, the pair of rear-side pressing portions 84 is located beside a region facing the sacrum of the wearer. The rear-side pressing portion 84 may extend linearly or dotted along the front-rear direction L. In addition, the front-back direction L may be somewhat inclined or curved, and the rear-side pressing portion 84 is considered to extend along the front-back direction L. Specifically, the pair of rear-side pressing portions 84 may partially or entirely extend along the front-rear direction L. The pair of rear-side pressing portions 84 has a wide interval in which the distance in the width direction W becomes wider toward the rear side. That is, the rear-side press part 84 inclines toward the outer side in the width direction W as it goes toward the rear side.

In the embodiment shown in FIG. 1, the pair of elongated pressing portions 82 is arranged to be separated from the pair of rear pressing portions 84. The distance between the pair of elongated pressing portions 82 and the pair of rear-side pressing portions 84 is preferably at least 1 cm, and more preferably at least 3 cm. A pair of elongated press sections 82 and a pair of rear press sections 84 The section P1 between which the press section is not formed can span the maximum width of the hip flap.

A part of the absorbent core 31 provided in the rear region S3 is arranged in a region sandwiched by a wide section. It is preferable that a part of the front and rear slits 42 extend in a region sandwiched by a wide section. It is more preferable that the front-rear slit 42 penetrates the region along the front-rear direction L.

The absorbent article 1 includes a first pressing section 85, a second pressing section 87, and a third pressing section 86. These are formed by forming at least two of the sheets constituting the skin surface sheet 10 and the non-skin surface sheet 20 in The thickness direction T is formed by compression. The first pressing section 85, the second pressing section 87, and the third pressing section 86 are formed along at least the outer edge 4E of the hip flap 4.

The first pressing section 85 is provided in the width direction W of the absorbent article 1 and is provided on the outside of the absorbent core 31. The first pressing portion 85 is formed further along the imaginary line IL than the imaginary line IL obtained by connecting the foot portions of the convex portions 4F formed on the outer edge 4E of the hip flap 4 (see FIG. 4). The first press section 85 is preferably configured by a plurality of press sections which are arranged side by side in a discrete manner. The first press section 85 is more preferably composed of a plurality of dot-shaped press sections juxtaposed along the virtual line IL. The plurality of dot-shaped pressing portions may be provided in cooperation with the convex portions 4F. The distance L1 between the first pressing section 85 and the virtual line IL is preferably 1 mm or more and 10 mm or less.

No press section is formed in a region further outside than the imaginary line IL. In addition, it is preferable that the plurality of sheets constituting the hip flap 4 such as the side sheet 12 and the non-skin face sheet 20 are not bonded to each other in at least a part of an area further outside than the virtual line IL.

In the width direction W of the absorbent article 1, the second pressing portion 87 is provided further outside than the absorbent core 31. Further to the inner side than the first pressing portion 85, the second pressing portion 87 is formed along the outer edge 4E of the buttock flap 4 by a plurality of discrete pressing portions. The second press section 87 is preferably formed of a plurality of dot-shaped press sections. The pitch of the plurality of second press sections 87 is smaller than the pitch of the plurality of first press sections 85.

In the width direction W of the absorbent article 1, the third pressing portion 86 is provided further outside than the absorbent core 31. Between the first press section 85 and the second press section 87, the third press section 86 is formed of a plurality of press sections which are arranged side by side in a discrete manner. The third press section 86 is preferably formed of a plurality of dot-shaped press sections. The pitch of the plurality of third press sections 86 is smaller than the pitch of the plurality of first press sections 85 and larger than the pitch of the plurality of second press sections 87.

Each of the dot-shaped press sections constituting the first press section 85, the second press section 87, and the third press section 86 refers to a press section having a slight enlargement. It is preferable that the shape of the dot-shaped press portion does not extend too long along the imaginary line IL. Specifically, the length of each point-shaped press part along the direction of the virtual line IL may be substantially equal to or shorter than the length of the direction orthogonal to the virtual line IL. For example, it is preferable that each point-shaped press part is a round shape or a square shape. When the shape of each dot-shaped press part is circular, the diameter of each dot-shaped press part is preferably 0.5 to 5.0 mm, and more preferably 1.0 to 3.0 mm.

The first pressing section 85, the second pressing section 87, and the third pressing section 86 follow the imaginary line IL, and extend from the outer edge 4E of one hip flap 4 through the rear edge of the rear region S3 to the other hip flap. The outer edge of the sheet 4 is preferred.

When the absorbent article 1 is viewed from the skin surface side, the L * a * b * surface color L * value of the region where the absorbent body 30 is provided is closer to the buttocks flap 4 than the pressing portions 85, 86, and 87 described above. The difference between the L * values of the L * a * b * color system in the inner region is preferably 15 or less. In addition, the L * a * b * surface color system L * values of the regions of the buttock flap 4 where the press sections 85, 86, and 87 are not formed, and the L * a * b * tables of the press sections 85, 86, and 87. The difference in the L * value of the color system is preferably 5 or more and 23 or less.

The L * value of the L * a * b * color system based on the Commission Internationale de 1'Eclairage can be measured, for example, by using a color difference meter (CR-3000 manufactured by KONICA MINOLTA) as follows. First, the non-skin surface sheet 20 of the absorbent article is set as the lower surface, and the absorbent article is placed on the black sheet. Next, from the skin surface sheet 10 side of the absorbent article, the L * value of the area to be measured was measured by a color difference meter.

(4) Adhesive area

As shown in FIG. 2, the absorbent article 1 includes a first main body adhesion region 61, a second main body adhesion region 62, a wing adhesion region 63, and a hip wing provided with an adhesive for fixing the absorbent article 1 to the undergarment S. Sheet adhesion area 64. These adhesion areas 61 to 64 are provided on the non-skin facing surface of the non-skin face sheet 20. In the state before use, the adhesive areas 61 to 64 can be covered by a release sheet. The release sheet prevents deterioration of the adhesive in the adhesion areas 61 to 64 before use. The peeling sheet is peeled off by the user during use.

The first main body adhesion area 61 is disposed further forward than the second main body adhesion area 62. The first main body adhesive region 61 is arranged to be separated from the second main body adhesive region 62 in the front-rear direction L. The first main body adhesive region 61 may be disposed so as to cross the central region S1 and the front region S2 on the front side than the width slit 41. The second main body adhesion region 62 is located closer to the rear side than the width slit 41 and is arranged in the rear region S3. The wing portion adhesion area 63 is provided on the wing portion 3. The hip flap adhesion area 64 is provided on the hip flap 4.

The width slit 41 and the front-rear slit 42 do not overlap with all the adhesion regions 61 to 64 in the thickness direction T. In other words, in a plan view, in the region where the width slit 41 and the front-rear slit 42 are arranged, the adhesion regions 61 to 64 are not provided. In addition, the region sandwiched by the pair of rear-side pressing portions 84 can be arranged in a region that does not overlap the adhesion regions 61 to 64.

The first press section 85, the second press section 87, and the third press section 86 extend between the outer edge 4E of the hip flap 4 and the hip flap adhesion area 64. It is preferable that the adhesion region is not provided on the outer side in the width direction W than the buttock flap adhesion region 64.

The distance between the imaginary line IL obtained by connecting the foot portions of the convex portions 4F of the hip flap 4 and the hip flap adhesion area 64 is preferably 20 mm or less. It is preferable that the adhesive region 64 is provided at the position P1 of the maximum width of the hip flap 4.

(5) Other embodiments

Fig. 5 is a plan view of an absorbent article according to another embodiment. Hereinafter, the same configuration as the configuration shown in FIG. 1 may be omitted. And The same components as those shown in FIG. 1 are assigned the same reference numerals.

In the embodiment shown in FIG. 5, the absorbent article 1A has a pair of fold lines F1 along the front-rear direction L. The fold line F1 is a line used for folding for packaging the absorbent article 1A. FIG. 6 shows the absorbent article 1A folded by a pair of folding lines F1. In the embodiment shown in FIG. 5, the plurality of convex portions 4F formed on the outer edge 4E of the hip flap 4 are provided on the outer side in the width direction W than the fold line F1. Following this, the first pressing section 85, the second pressing section 87, and the third pressing section 86 are also provided on the outer side in the width direction W than the fold line F1. In this embodiment, it is preferable that the area where at least a plurality of convex portions 4F are formed is formed by the same number of sheets.

In addition, the absorbent article 1A is not only folded by a pair of folding lines F1 along the front-back direction L, but also can be further folded by folding lines along the width direction W.

(6) Actions and effects

According to an embodiment, the first pressing portion 85 is formed further along the imaginary line IL than the imaginary line IL obtained by connecting the foot portions of the convex portions 4F formed on the outer edge of the hip flap 4.

When a force is locally applied to the outer edge 4E of the buttocks flap 4 from the outside, the few convex portions 4F provided near the point where the force acts are folded back. However, since there is a gap (concave portion) between the convex portions 4F, it is difficult for the force applied to a certain convex portion 4F to be transmitted to the adjacent convex portions 4F. As a result, it is possible to suppress the hip flap 4 from being rolled up largely from the convex portion 4F to which a force is locally applied.

In addition, the rigidity of the area of the first pressing portion 85 provided in the inner side of the imaginary line IL obtained by connecting the ridges of the respective convex portions 4F is formed by the first pressing portion 85 and becomes higher. As a result, even if the convex portion 4F of the hip flap 4 is rolled up, the convex portion 4F is easily restored to the original state due to the high rigidity.

According to an embodiment, the first press section 85 is a plurality of dot-shaped press sections juxtaposed along the virtual line IL. When a force is locally applied to the outer edge of the buttocks flap 4 from the outside, the force is also applied to the point-shaped pressing portion. Here, if the first press section 85 is formed in a dot shape without being connected in a line, there is an advantage that the force applied to the dot press section is difficult to be transmitted to the adjacent dot press section. Since it is difficult to transmit the force to the adjacent point-shaped pressing part, even if a force is locally applied to a part of the buttock flap 4, the situation that the buttock flap 4 is completely rolled up can be further suppressed.

When the shape of each point-shaped pressing part is circular, the diameter of each point-shaped pressing part is preferably 0.5 to 5.0 mm, more preferably 1.0 to 3.0 mm. By setting the diameter of each point-shaped pressing portion to be 0.5 mm or more, the outer edge of the buttock flap is easily bent at the point-shaped pressing portion, and it is possible to suppress the entire hip-flap from being greatly bent. In addition, by setting the diameter of each of the dot-shaped pressing portions to 5.0 mm or less, it is possible to reduce the discomfort when the dot-shaped pressing portions are in contact with the skin.

According to an embodiment, the plurality of dot-shaped pressing portions constituting the first pressing portion 85 are provided in cooperation with the convex portions 4F. In this way, by setting the dot-shaped pressing portion corresponding to the convex portion 4F of the hip tab 4, even if any of the convex portions 4F is rolled up, the original state can be easily restored.

According to an embodiment, the plurality of convex portions 4F are from one hip The outer edge 4E of the partial flap 4 passes through the rear edge of the rear region S3 and extends to the outer edge 4E of the other hip flap 4. The first pressing section 85 extends along the imaginary line IL from the outer edge 4E of one hip flap 4 through the rear edge of the rear region S3 to the outer edge 4E of the other hip flap 4. Thereby, not only the outer edge 4E of the buttocks flap 4 but also the rear edge of the rear region S3 can suppress the roll-up of the absorbent article 1, and the rolled-up convex portion 4F can be easily restored to the original state.

In one embodiment, no press section is formed in a region further outside than the virtual line IL. Thereby, it is possible to set the rigidity in the outer edge region further outside than the imaginary line IL. Thereby, the outer edge 4E of the hip flap 4 can be made soft, and the irritation to the skin of a user can be reduced.

In one embodiment, the hip flap 4 includes a plurality of sheets (for example, a side sheet 12 and a non-skin face sheet 20). In addition, the plurality of sheets are not bonded to each other in at least a part of an area further outside than the virtual line IL. Thereby, compared with the rigidity of the part where several sheets are joined to each other, the rigidity of the area | region of the outer edge further outside than the virtual line IL can be made small. As a result, the convex portion 4F becomes difficult to turn back, and the irritation to the skin of the user can be reduced.

In one embodiment, the area where the plurality of convex portions 4F are formed is formed of the same number of sheets. If there are portions composed of sheets of different numbers, the absorbent article 1 is easily folded back along the boundary of the sheets. In one embodiment, since the area where the plurality of convex portions 4F are formed is made of the same number of sheets, it is possible to suppress the sheet from easily returning in this area.

In one embodiment, the imaginary line IL monotonously bulges toward the outside of the width direction W from the front side to the rear side in a region closer to the front side than the position P1 of the maximum width of the hip flap 4. Thereby, the width | variety of the buttocks flap 4 becomes large gradually from the front side to the back side in the area | region of the front side more than the position P1 of the maximum width of the buttocks flaps 4. As a result, the hip flap 4 can suppress the occurrence of wrinkles. It is assumed that when the width of the hip flap 4 increases or decreases in a region closer to the front side than the position P1 of the maximum width of the hip flap 4, the narrow width of the hip flap 4 is likely to cause wrinkles in the width direction W. Such wrinkles easily induce bending of the convex portion 4F of the buttocks flap 4.

In one embodiment, the hip flap 4 includes a non-skin facing sheet 20 provided on the non-skin facing side, and an adhesion region 64 provided on the non-skin facing surface of the non-skin facing sheet 20. The first pressing portion 85 extends between the outer edge 4E of the hip flap 4 and the adhesive region 64. The adhesion area 64 suppresses the hip flap 4 from rolling up. In particular, the adhesive region 64 can be fixed to the underpants in the region of the buttocks flap 4 which is more inward than the first pressing portion 85, and can assist in returning the folded-back convex portion 4F to the original state. Features.

In one embodiment, the adhesive region 64 is provided on the hip flap 4. Thereby, the adhesion area 64 is arrange | positioned in the position close to the imaginary line IL obtained by the foot part which connects the convex part 4F of the buttock flap 4. As a result, the outer edge of the buttock flap 4 is suppressed from being rolled up significantly.

In one embodiment, the adhesive region 64 is provided at the position P1 of the maximum width of the hip flap 4. Position of maximum width of hip flap P1 The system extends to the outermost area and easily bends easily during use. By providing the adhesive region 64 at the position P1 of the maximum width of the hip flap, it is possible to prevent the hip flap 4 from being greatly bent.

In one embodiment, the virtual line IL is monotonically narrowed toward the inner side of the width direction W from the front side to the rear side in a region closer to the rear side than the adhesion region 64. Thereby, the width | variety of the buttocks flap 4 in the area | region further to the back side than the adhesion area | region 64 becomes substantially small as it goes from the front side to the back side. By reducing the width of the region of the buttock flap 4 closer to the rear side than the portion fixed by the adhesive region 64, it is possible to suppress a large back of the portion of the buttock flap 4 behind.

In one embodiment, the convex portion 4F is provided on the outer side in the width direction W than the fold line F1. Since the fold line F1 does not overlap with the convex portion 4F of the buttock flap 4, it is possible to prevent the habit of bending at the convex portion 4F.

The present invention using the above embodiments has been described in detail, but those skilled in the art should understand that the present invention is not limited to the embodiments described in this specification. As long as the present invention does not exceed the interest and scope of the present invention defined by the description of the scope of patent application, modifications and changes can be made. Therefore, the description in this specification is for the purpose of illustration, and does not have any limiting meaning to the present invention.

The entire contents of Japanese Patent Application No. 2015-116106 filed on June 8, 2015 are incorporated herein by reference.

[Industrial availability]

Provided is an absorbent article capable of improving the roll-up of a hip flap of an absorbent article.

Claims (12)

An absorbent article includes a front-rear direction and a width direction orthogonal to each other, a central region arranged under a user's crotch, and a rear region positioned on a rear side of the central region, and the rear region is provided with a direction toward the aforementioned region. The hip flaps bulging outward in the width direction, and the outer edges of the hip flaps are formed in a wavy shape having a plurality of convex portions. A press section is formed along the imaginary line, and a press section is not formed in a region further outside than the imaginary line. The absorbent article according to claim 1, wherein the pressing section is a plurality of dot-shaped pressing sections arranged side by side along the imaginary line. The absorbent article according to claim 2, wherein the plurality of dot-shaped pressing portions are provided in cooperation with each of the convex portions. The absorbent article according to any one of claims 1 to 3, wherein the plurality of convex portions extend from the outer edge of one hip flap through the rear edge of the rear region to the outer edge of the other hip flap The press portion extends along the imaginary line from the outer edge of one hip flap through the rear edge of the rear region to the outer edge of the other hip flap. The absorbent article according to any one of claims 1 to 3, wherein the buttocks flap includes a plurality of sheets in at least a part of a region further outside than the imaginary line, the aforementioned The plurality of sheets are not bonded to each other. The absorbent article according to any one of claims 1 to 3, wherein the buttock flap includes a plurality of sheets, and the region where the plurality of convex portions are formed is composed of the same number of sheets. The absorbent article according to any one of claims 1 to 3, wherein the imaginary line moves from the front side to the rear side toward the width direction in a region closer to the front side than the position of the maximum width of the hip flap. The outside swells monotonously. The absorbent article according to any one of claims 1 to 3, wherein the buttock flap includes a non-skin facing sheet provided on the non-skin facing side, and a non-skin facing sheet provided on the non-skin facing sheet. In the surface adhesion area, the pressing part extends between the outer edge of the hip flap and the adhesion area. The absorbent article according to claim 8, wherein the adhesive region is provided on the hip flap. The absorbent article according to claim 8, wherein the adhesive region is provided at a position of a maximum width of the hip flap. In the absorbent article according to claim 10, the virtual line is monotonically narrowed inward in the width direction from the front side to the rear side in a region closer to the rear side than the adhesion region. The absorbent article according to any one of claims 1 to 3, which has a fold along the aforementioned front-rear direction for folding the aforementioned absorbent article. Line, the convex portion is provided on the outer side in the width direction than the folded line.