CN112294543A

CN112294543A - Absorbent article

Info

Publication number: CN112294543A
Application number: CN201910694466.9A
Authority: CN
Inventors: 穆沁一; 佐竹伸介; 蒋维; 马雪琪; 张贤
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2021-02-02
Also published as: KR20220042362A; CN114173729A; WO2021020544A1

Abstract

The invention provides an absorbent article which can be cleanly discarded in a state of being rolled up by a post-treatment member. An absorbent article (1) is provided with: a main body (20) having a front sheet (21), a back sheet (22), and an absorbent core (23); and a post-treatment member (30) disposed on the non-skin surface side of the main body. The post-treatment member has a hook member (31) protruding toward the non-skin surface side. At 50g/cm²The thickness of the surface sheet is smaller than the thickness of the hook member in a pressed state under load. The hook member is configured to be engageable with the topsheet in a folded state such that the skin surface side of the absorbent article is positioned inside.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article provided with a post-treatment member used at the time of disposal.

Background

Patent document 1 discloses an absorbent article such as a disposable diaper or a sanitary napkin provided with a post-treatment member used at the time of disposal. The post-treatment member of patent document 1 is a tape member, and has a tape base material and a main body adhesion portion provided on the tape base material. The tape base material is provided with: a base secured to the back sheet; and an extension portion, which is provided continuously with the base portion, and is extensible. The body bonding portion is provided at the extension portion. When the absorbent article is discarded, the user stretches the extension portion of the belt base material to fix the absorbent article in a rolled state by the main body adhesive portion.

Patent document

Patent document 1: japanese laid-open patent publication No. 9-99010

Disclosure of Invention

Problems to be solved by the invention

The tape base material described in patent document 1 is folded before use, and a main body adhesive portion is disposed between the folded tape base materials. The main body adhesive section is provided on the surface facing the back sheet in an extended state, and is joined to the back sheet at the time of disposal to fix the absorbent article in a rolled state.

As in the absorbent article of patent document 1, there is a demand for an absorbent article that can be rolled up compactly at the time of disposal and can maintain the rolled-up state. However, absorbent articles having a disposable belt member have not been sufficiently widespread, and some users cannot smoothly extend the belt member or join the belt member at a desired position, leaving room for improvement in operability.

Therefore, an absorbent article that can be cleanly discarded in a rolled state by the post-treatment member is desired.

Means for solving the problems

An absorbent article having a configuration: a front-back direction; a width direction orthogonal to the front-rear direction; a main body section having a front sheet, a back sheet, and an absorbent core, the front sheet having fibers; and a post-treatment member disposed on the non-skin surface side of the main body portion and having a hook member protruding toward the non-skin surface side, wherein the amount of the post-treatment member in the absorbent article is 50g/cm²The thickness of the top sheet is smaller than the thickness of the hook member in a pressed state under load, and the hook member is configured to be engageable with the top sheet in a folded state such that the skin surface side of the absorbent article is positioned inward.

Drawings

Fig. 1 is a plan view of the absorbent article of embodiment 1 in a developed state, as viewed from the skin surface side.

Fig. 2 is a plan view of the absorbent article of embodiment 1 in the 1 st folded state, as viewed from the skin surface side.

Fig. 3 is a plan view of the absorbent article of embodiment 1 in a developed state, as viewed from the non-skin surface side.

Fig. 4 is a sectional view taken along line a-a shown in fig. 1.

Fig. 5 is an enlarged view of the portion B shown in fig. 4.

Fig. 6 is a view showing the absorbent article in a packaged state.

Fig. 7 is a view for explaining a state in which the absorbent article is rolled up in the front-rear direction at the time of disposal.

Fig. 8 is a view schematically showing the absorbent article in a natural state.

Fig. 9 is a sectional view of the absorbent article of embodiment 1.

Description of the reference numerals

1. 1X, an absorbent article; 20. a main body portion; 21. a surface sheet; 21C, 21CX, center piece; 21S, side sheet; 22. a back sheet; 23. an absorbent core; 30. a member for post-treatment; 31. a hook member; 311. a shaft portion; 312. an umbrella part; l, the front-back direction; w, width direction.

Detailed Description

(1) Brief description of the embodiments

At least the following matters will be made clear from the description of the present specification and the drawings.

An absorbent article of one form has: a front-back direction; a width direction orthogonal to the front-rear direction; a main body section having a front sheet, a back sheet, and an absorbent core, the front sheet having fibers; and a post-treatment member disposed on the non-skin surface side of the main body portion and having a hook member protruding toward the non-skin surface side, wherein the amount of the post-treatment member in the absorbent article is 50g/cm²The thickness of the top sheet is smaller than the thickness of the hook member in a pressed state under load, and the hook member is configured to be engageable with the top sheet in a folded state such that the skin surface side of the absorbent article is positioned inward.

When the absorbent article is rolled up at the time of disposal, the absorbent article is generally rolled up so that the skin surface side to which the excrement adheres is located inside. The surface sheet is disposed so as to cover the non-skin surface of the main body portion in a state folded with the skin surface side of the main body portion being on the inner side, and the hook member positioned on the non-skin surface side of the main body portion is engaged with the surface sheet during the operation of rolling up the absorbent article, thereby maintaining the rolled-up state of the main body portion. In the process of rolling up the absorbent article, the user applies a force to the main body portion to perform a rolling operation. The applicant has conducted intensive studies and, as a result, the force applied to the absorbent article during the operation of rolling up the absorbent article becomes at least 50g/cm². That is, the main body and the post-treatment member are applied with the 50g/cm in the thickness direction during the operation of rolling up the absorbent article²The pressing state of the load. In the pressed state, the thickness of the surface sheet is thinner than the thickness of the hook member, and at least a part of the hook member is likely to penetrate the surface sheet. By the hook member penetrating the surface sheet, the hook member once hooked to the fiber of the surface sheet is difficult to be pulled out. Therefore, when the hook member is engaged with the top sheet, the engaged state is easily maintained, and the absorbent article can be cleanly discarded in a state of being rolled up by the post-treatment member.

According to a preferred aspect, the main body may include an auxiliary sheet having fibers and disposed between the top sheet and the absorbent core, and the auxiliary sheet may have a fiber length longer than that of the top sheet.

According to this aspect, the fibers of the auxiliary sheet have a long fiber length, and are wound more in a state of being wound into the sheet, so that the hook member is easily entangled. Therefore, when the hook member penetrates the surface sheet and reaches the auxiliary sheet, the engagement state between the fibers of the auxiliary sheet and the hook member is easily maintained. Further, the surface sheet in contact with the skin has a short fiber length, and therefore can improve the skin feel.

An absorbent article of another embodiment may include: a front-back direction; a width direction orthogonal to the front-rear direction; a main body section having a front sheet, a back sheet, and an absorbent core; and a post-treatment member disposed on the non-skin surface side of the main body portion and having a hook member protruding toward the non-skin surface side, wherein the top sheet includes: water-retaining fibers; and thermoplastic resin fibers having a fiber length longer than that of the water-retentive fibers, wherein the hook members are configured to be engageable with the topsheet in a folded state with the skin surface side of the absorbent article facing inward.

The thermoplastic resin fibers have a long fiber length and are arranged in a state of being crimped into a sheet. Further, since the thermoplastic resin fibers have a relatively long fiber length, the thermoplastic resin fibers are wound more in a crimped state, and the hook members are easily entangled. The hook member is easily hooked on the thermoplastic resin fiber, and the state in which the hook member is engaged with the surface sheet is easily maintained. In addition, the water-retentive fibers in a wet state are more likely to be loosened and the top sheet becomes soft than before wetting, and are more likely to be deformed when the absorbent article is rolled up. Therefore, when the absorbent article is rolled up, the rolled-up state of the absorbent article is easily maintained at the time of disposal.

According to a preferred aspect, the top sheet may have a heat-bonded portion of the thermoplastic resin fiber.

According to this aspect, the hook member is easily hooked on the thermally bonded portion of the thermoplastic resin fiber, and the front sheet and the back sheet are easily maintained in contact with each other, and the absorbent article is easily maintained in a rolled state when discarded.

According to a preferred aspect, the surface sheet may have: a 1 st layer having at least the water-retentive fibers; and a 2 nd layer which is disposed on the non-skin surface side of the 1 st layer, has at least the thermoplastic resin fiber, and has a thickness of 50g/cm²The thickness of the 1 st layer is smaller than the thickness of the hook member in a pressed state under a load of (1).

In the pressed state, the thickness of the 1 st layer is thinner than the thickness of the hook member, and at least a portion of the hook member penetrates the 1 st layer and engages with the 2 nd layer. The hook member hooked to the thermoplastic resin fiber of the 2 nd layer is difficult to pull out, and once the hook member is engaged with the surface sheet, the engaged state thereof is easily maintained.

According to a preferred aspect, the main body portion may have an extensible portion that extends and contracts in the front-rear direction, and the extensible portion may be disposed on a front side of a front end edge of the aftertreatment member and on a rear side of a rear end edge of the aftertreatment member.

When the absorbent article is rolled up at the time of disposal, the post-treatment member is joined to the topsheet. At this time, when the portion of the stretchable and contractible portion located on the front side of the front end edge of the aftertreatment member and the portion located on the rear side of the rear end edge of the aftertreatment member contract in the front-rear direction, the hook member engaged with the topsheet moves in the planar direction in the topsheet, and the hook member hooks the fibers of the topsheet. Therefore, the absorbent article can be cleanly discarded after use while maintaining the state in which the hook member is joined to the topsheet.

According to a preferred aspect, the front sheet may be formed with a hole penetrating in a thickness direction.

According to this aspect, the hook member is inserted into the hole portion of the top sheet, so that the hook member is more likely to enter the non-skin surface side, and the hook member is more likely to be hooked on the top sheet. In addition, in a state where the absorbent article is rolled up at the time of disposal, the hook member may be inserted obliquely without being inserted perpendicularly to the topsheet. In such a rolled-up state of the absorbent article, the hook member is inserted into the hole of the top sheet, and the hook member is hooked in the hole, so that the state in which the hook member is joined to the top sheet is more easily maintained.

According to a preferred aspect, a plurality of sheet compressed portions, which are formed by compressing at least the surface sheet in the thickness direction, may be formed, and the interval between the sheet compressed portions may be longer than the pitch of the hook members.

In the area between the sheet compressed part and the sheet compressed part, there is a space between the fibers of the surface sheet as compared with the area where the sheet compressed part is formed, and the hook member is easily hooked on the surface sheet. The area where the hook member is liable to be hooked on the surface sheet is longer than the pitch of the hook member, and the hook member is liable to be engaged with the surface sheet without being aware of the position where the hook member is fixed.

According to a preferred aspect, the sheet compressing portion may be formed on the non-skin surface of the top sheet and recessed from the non-skin surface side toward the skin surface side.

Fibers in the region where the sheet compressing portion is formed are compressed, and the space between the fibers is reduced, so that the hook member may be difficult to hook. When the sheet compressed portion is in a form recessed from the non-skin surface side toward the skin surface side, a portion where the space between the fibers is small is formed on the non-skin surface of the topsheet. By disposing the surface on which the portion where the space between the fibers is small on the non-skin surface side, the state of engagement between the hook member inserted from the skin surface side of the topsheet and the topsheet can be easily achieved.

According to a preferred aspect, the hook member may include: a shaft portion extending toward the non-skin surface side; and an umbrella portion extending in a planar direction at a distal end of the shaft portion, wherein a thickness of the shaft portion is larger than a thickness of the surface sheet in the pressed state.

In the pressed state, the thickness of the surface sheet is smaller than that of the shaft portion, at least a part of the shaft portion of the hook member penetrates the surface sheet, and the umbrella portion penetrates the surface sheet. Since the umbrella portion of the hook member penetrates the surface sheet, the umbrella portion of the fiber hooked on the surface sheet is difficult to be pulled out, and the hook member is easily engaged with the surface sheet to maintain the engaged state.

(2) Absorbent article according to embodiment 1

Hereinafter, an absorbent article according to embodiment 1 will be described with reference to the drawings. The absorbent article is preferably an absorbent article such as a sanitary napkin, a panty liner, a breast pad, an incontinence pad for adults, a disposable diaper, a feces pad or a sweat absorbing sheet. In particular, the absorbent article is preferably used by being attached to the inside of a wearing article such as underwear of a user.

In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the ratio of the respective dimensions and the like may be different from the actual ratio of the respective dimensions and the like. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, there are cases where: the drawings also include portions having different dimensional relationships and ratios from each other.

Fig. 1 and 2 are plan views of the absorbent article of embodiment 1, as viewed from the skin surface side. Fig. 1 shows an unfolded state of the flaps described later, and fig. 2 shows a 1 st folded state of the flaps. Fig. 3 is a plan view of the absorbent article of embodiment 1 in a developed state, as viewed from the non-skin surface side.

Fig. 4 is a sectional view taken along line a-a shown in fig. 1. Here, the "skin surface side" corresponds to a side facing the skin of the wearer during use. The "non-skin-side" corresponds to a side facing in a direction opposite to the skin of the wearer during use.

The absorbent article 1 has a front-back direction L and a width direction W. The front-back direction L is a direction extending from the front side (ventral side) to the back side (dorsal side) of the wearer, or a direction extending from the back side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L.

The absorbent article 1 has a central region S2, a front region S1, and a back region S3. The central region S2 is a region disposed opposite to the excretory opening of the wearer, for example, the vaginal opening. The central region S2 is a region that is disposed in the crotch portion of the wearing article and between the legs of the wearer when the absorbent article 1 is attached and fixed to the wearing article. The front region S1 is located more forward than the center region S2. The front end edge of the front side region S1 defines the front end edge of the absorbent article 1. The rear region S3 is located rearward of the central region S2. The rear end edge of the rear region S3 defines the rear end edge of the absorbent article 1.

The flaps 25 are preferably provided in the central region S2. The flaps 25 extend outward in the width direction W from the absorbent core 23 and are folded toward the non-skin surface side T2 of the wearing article during use. The wings preferably have a surface sheet 21 and a back sheet 22. The leading end edges of the flaps 25 are defined by the base portions of the flaps 25, and correspond to the portions located on the front side of the two portions recessed inward in the width direction W. The front end edges of the flaps 25 may also define the boundaries between the central region S2 and the front region S1. The rear end edges of the flaps 25 are defined by the base portions of the flaps 25, and correspond to the portions located on the rear side of the two portions recessed inward in the width direction W. The rear end edges of the flaps 25 may also define the boundary between the central region S2 and the rear region S3. The inner edges of the flaps 25 are the flap roots and are imaginary lines connecting the front edges of the flaps 25 and the rear edges of the flaps 25. In the case of an absorbent article without the flaps 25, the central region S2 may be formed by regions obtained by trisecting the main body section 20 in the front-rear direction L at the position where the length of the main body section 20 in the front-rear direction L is longest (in the present embodiment, the main body width center 20CW which is the center of the main body section 20 in the width direction W) constitute the front region S1, the central region S2, and the rear region S3, and in the case of an absorbent article in which the absorbent core 23 has a high basis weight section, the central region S2 may be formed by a region having a high basis weight section.

The absorbent article 1 preferably includes a main body 20 and a post-treatment member 30. The main body portion 20 includes: a top sheet 21 facing the skin of the wearer; a back sheet 22 facing the side opposite to the wearer's skin; and an absorbent core 23 between the front sheet 21 and the back sheet 22. The top sheet 21 is disposed on the side facing the skin of the wearer during use. The top sheet 21 is preferably made of a nonwoven fabric or woven fabric having fibers. The front sheet 21 may be configured to be engageable with a hook member 31 of the aftertreatment member 30 described later. The top sheet 21 may be made of woven or nonwoven fabric having fibers, and the fibers may be configured to be hooked to the hook members 31, or the top ends of the hook members 31 may be configured to be easily hooked by the irregularities formed on the skin surface of the top sheet 21. The back sheet 22 faces the side opposite the wearer's skin in use. The top sheet 21 is preferably composed of a liquid-permeable sheet. The back sheet 22 preferably comprises a liquid impermeable sheet.

As shown in fig. 1 and 4, the top sheet 21 preferably has a central sheet 21C covering the center of the absorbent core 23 in the width direction W and a side sheet 21S overlapping the outer side portion of the central sheet 21C. The central sheet 21C is preferably disposed closer to the skin surface side T1 than the side sheet 21S. The inner edge of the side sheet 21S is preferably folded back outward in the width direction W, and the elastic member 28 is preferably disposed between the side sheets 21S. An expansion/contraction portion 26 that is contracted in the front-rear direction L by the elastic member 28 is provided on an inner side portion of the side sheet 21S. The stretchable part 26 preferably constitutes a rib-preventing opening standing from the center sheet 21C. The stretchable portion 26 of the side sheet 21S constitutes the stretchable portion of the present invention. In another embodiment, when the back sheet is formed of an extensible sheet extensible in the front-rear direction L, the back sheet preferably forms the extensible part of the present invention. The stretchable portion may be stretchable in at least the front-rear direction L, or may be stretchable in the front-rear direction L and stretchable in the width direction W.

The main body 20 preferably has an auxiliary sheet 24 disposed between the topsheet 21 and the absorbent core 23. The auxiliary sheet 24 is positioned closer to the non-skin surface side T2 than the top sheet 21 and closer to the skin surface side T1 than the absorbent core 23. The auxiliary sheet 24 has fibers, and introduces body fluid from the surface sheet 21 side and guides the fluid toward the absorbent core 23. The auxiliary sheet 24 is preferably disposed in a region overlapping at least the absorbent core 23. The auxiliary sheet 24 is preferably made of a hot air non-woven fabric.

The absorbent core 23 extends in the front-rear direction L of the absorbent article 1. The absorbent core 23 has an absorbent material that can absorb moisture. The absorbent core 23 is preferably covered by a core wrap, not shown. Further, the core wrap layer may also serve as an auxiliary sheet by constituting the core wrap layer with a nonwoven fabric. The core wrap can be constructed of, for example, tissue paper. It is preferable that at least the absorbent core 23 is formed in the body 20 with a core compression portion 231 compressed in the thickness direction. In the present specification, the term "along the front-rear direction L" refers to a direction having an angle of less than 45 ° with respect to the front-rear direction L, and the term "along the width direction W" refers to a direction having an angle of less than 45 ° with respect to the width direction W.

The adhesive section 50 is preferably provided on the non-skin surface side T2 of the main body section 20 (non-skin surface of the back sheet 22). The adhesive part 50 is a region provided with an adhesive for joining the main body part 20 to a wearing article. The adhesive section 50 preferably has a main body adhesive section 51 disposed in a region overlapping the absorbent core 23 and a flap adhesive section 52 provided on the flap 25. The body bonding portions 51 extend in the front-rear direction L and are arranged at intervals in the width direction W. The adhesive part 50 is preferably covered with a cover sheet 40 described later before use. The main body bonding portions 51 are preferably disposed on both sides of the aftertreatment member 30 in the width direction W. The body bonding portions 51 may extend in the width direction W and be arranged at intervals in the front-rear direction L. The adhesive section 50 preferably has a function of joining the main body section 20 to a wearing article during use and a function of joining the top sheet 21 to the top sheet in an auxiliary manner during disposal.

The absorbent article 1 is configured to be able to be discarded in a rolled state of the absorbent article 1, and more specifically, the absorbent article 1 is configured to be able to be discarded in a rolled state along the front-rear direction L or the width direction W by joining the post-treatment member 30 to the main body portion 20. The direction in which the absorbent article 1 is rolled up is a direction in which the length thereof becomes shorter due to rolling up, and in the present embodiment, is the front-rear direction L. The aftertreatment member 30 is provided on the non-skin surface side T2 of the main body portion 20. The non-skin surface of the main body portion 20 in the present embodiment is constituted by the back sheet 22, and the post-treatment member 30 is disposed on the non-skin surface of the back sheet 22. The post-treatment member 30 is preferably disposed in a region overlapping the absorbent core 23. The post-treatment member 30 may have a rectangular shape in plan view as shown in fig. 3, may have a circular shape such as an ellipse, may be provided in a plurality of dot shapes, or may be provided in a plurality of linear shapes. When the corner of the aftertreatment member 30 is curved, such as in an oval shape, the discomfort of the aftertreatment member 30 when it hits the user can be reduced.

The bending rigidity of the aftertreatment member 30 is preferably lower than the bending rigidity of the region where the front sheet 21, the back sheet 22, and the absorbent core 23 are superposed. When the absorbent article 1 is used, the aftertreatment member 30 is disposed on the non-skin surface side T2 of the main body portion 20, and the aftertreatment member 30 indirectly contacts the skin. In this case, since the bending rigidity of the aftertreatment member 30 is low, the wearer can be prevented from feeling uncomfortable.

The bending rigidity of the post-treatment member 30, the bending rigidity of the back sheet 22, the absorbent core 23, and the portion where the front sheet 21, the back sheet 22, and the absorbent core 23 are superposed on each other are measured by the taber method defined in JISP-8125. For example, first, a test piece having a width of 25mm and a length of 38mm is collected from a member (piece) to be measured. Then, a thickness meter (e.g., 44mm 3g/m manufactured by PEACOCK)²) The thickness of the test piece was measured. Next, the test piece was set in a Taber hardness tester of Antian Seikagana mechanism. Subsequently, the test piece was placed between rollers of a Taber hardness tester, and the jig was clamped at intervals corresponding to the thickness of the test piece. Further, the upper end of the test piece is aligned with the upper surface of the jig. The spacing between the roller and the test piece was adjusted to about 0.5mm so that the roller did not press the test piece. The test piece bending device of the Taber hardness tester is rotated, the rotation of the bending device is stopped at a point where a 15-degree scribed line of the test piece bending device coincides with the pointer of the load pendulum, and the load scale indicated by the pointer of the pendulum at that time is read. The load pendulum rod is immediately rotated in opposite directions, the load scales are read in the same way, and the average value of the load scales in the left direction and the right direction is obtained. Further, the auxiliary weight (Japanese: おもり) was arbitrarily selected so that the indicated load scale was in the range of 15% to 85% of the maximum scale. Then, the bending stiffness (g · cm)) of the test piece was calculated by the expression "stiffness (g · cm) — the average value of the load scales × 10 × the number of weights". In addition, in the sampleWhen the length in the width direction W is less than 25mm, the data measured as the maximum width of the sample is converted to N/25 mm. In addition, in the case where the length of the sample is less than 38mm, the measurement is carried out in the maximum length. The bending stiffness was measured 10 times, and the average value was obtained.

Fig. 5 is a sectional view of the portion B of fig. 4. The aftertreatment member 30 has a hook member 31 protruding toward the non-skin surface side T2. The hook member 31 is configured to be engageable with the topsheet 21 in a state where the absorbent article 1 is folded so that the skin surface side T1 of the main body portion 20 is located inside, for example, when the absorbent article is discarded. The hook member 31 may be formed by a portion of the back sheet 22 protruding toward the non-skin surface side T2, or may be formed by a member separate from the back sheet 22. As shown in fig. 5, the hook member 31 of the present embodiment is formed of a member separate from the back sheet 22, and projects toward the non-skin surface side T2 from the base sheet 35 joined to the non-skin surface of the back sheet 22. Preferably, the base sheet 35 and the hook member 31 are integrated. The hook member 31 preferably includes a shaft portion 311 extending toward the non-skin surface side T2, and an umbrella portion 312 extending outward in the planar direction at the tip of the shaft portion 311 than the shaft portion 311. A plurality of hook members 31 may be arranged at intervals in the front-rear direction L and the width direction W, or only 1 hook member may be arranged. The base sheet 35 is joined to the non-skin surface of the main body portion 20. The base sheet 35 of the present embodiment is joined to the back sheet 22 in the joining region. The joining region is preferably provided in the entire aftertreatment member 30.

The post-treatment member 30 is composed of a sheet-like base sheet 35 and a plurality of hook members 31 rising from the front surface (back surface) of the base sheet, and a post-treatment member having, for example, anchor-shaped or hook-shaped hook members 31 can be used. As the post-processing member 30, a known male member of a mechanical surface fastener can be used, and for example, male members such as "magitape (registered trademark)" (manufactured by Kuraray corporation), "QUICKLON (registered trademark)" (manufactured by YKK corporation), "magitfloat (japanese: マジクロス) (registered trademark)" (Kanebo ball touch (manufactured by カネボウベルタッチ corporation) and the like can be used.

In the modification, the post-treatment member 30 preferably has a post-treatment adhesive portion for secondarily joining the hook member 31 and the surface sheet 21. The post-treatment adhesive portion is preferably provided on the surface of the post-treatment member 30 other than the skin surface side. The post-treatment adhesive portion may be disposed on at least the non-skin surface of the post-treatment member 30, and is preferably disposed on a surface of the shaft portion or the like other than the non-skin surface of the post-treatment member 30. The post-treatment adhesive portion may be provided on the hook member 31, preferably on the base sheet 35. Since the post-treatment adhesive portion is provided, the engaging force at the time of engaging the hook member 31 with the surface sheet 21 at the time of disposal can be further ensured. Even in the case of a nonwoven fabric of short fibers (fiber length of approximately 10mm or less) such as spunlace nonwoven fabric or a nonwoven fabric in which it is difficult to ensure strength for fiber entanglement, the joining force with respect to the top sheet 21 is ensured by the post-treatment bonded portions, and the rolled-up state of the absorbent article 1 is more easily maintained by the post-treatment member 30. The adhesive constituting the post-treatment adhesive portion may be the same as the adhesive portion 50 or may be different from the adhesive portion 50.

The non-skin surface of the absorbent article 1 is preferably covered with the cover sheet 40 before use. The cover sheet 40 is preferably at least one of an individual package sheet 41 for individually packaging the absorbent article 1 and a release sheet 42 for covering the adhesive part 50. Preferably, the cover sheet 40 is disposed on the non-skin surface side T2 of the aftertreatment member 30 and covers the hook member 31. The cover sheet 40 covers the absorbent article 1 before use and is separated from the absorbent article 1 during use. By covering the hook members 31 with the cover sheet 40, exposure of the hook members 31 to the outside can be suppressed and the hook members 31 can be protected before the absorbent article 1 is used. Therefore, it is possible to suppress the trouble that the hook member 31 is accidentally damaged or the hook member 31 is accidentally touched to the skin before use. The cover sheet 40 of the present embodiment is composed of both the individual package sheet 41 and the release sheet 42. As shown in fig. 4, it is preferable that the release sheet 42 is disposed on the non-skin surface side T2 of the hook member 31 of the post-treatment member 30, and the individual package sheet 41 is disposed on the non-skin surface side T2 of the release sheet 42. Since the release sheet 42 is disposed between the hook member 31 and the individual package sheet 41, it is possible to suppress a problem that the individual package sheet 41 is accidentally broken by the hook member 31.

The main body 20 is preferably folded from a plurality of creases before use. Fig. 6 is a view showing a packaged state in which the absorbent article 1 is folded with the fold line as a base point and the main body portion 20 is individually packaged with the individual packaging sheet 41. Fig. 6 (a) is a plan view of the absorbent article in a packaged state, and fig. 6 (b) is a cross-sectional view taken along the line C-C shown in fig. 6 (a). The plurality of folds are preferably folds that fold at least the main body portion 20, and may be folds that fold the main body portion 20, the aftertreatment member 30, and the cover sheet 40 together. The plurality of folding lines preferably have a pair of front-rear folding lines FL extending in the front-rear direction L and a pair of width folding lines FW extending in the width direction W.

The pair of front and rear folding lines FL are preferably arranged at intervals in the width direction W, and are preferably arranged on both sides with respect to the body width center 20 CW. The pair of front and rear folding lines FL has the 1 st front and rear folding line FL1 and the 2 nd front and rear folding line FL 2. The pair of front and rear folding lines FL are preferably folding lines for folding the flaps 25 inward in the width direction W. Fig. 2 shows the 1 st folded state in which the flaps 25 are folded from the front and rear fold lines FL as base points. The pair of front and rear folds FL of embodiment 1 are located on the outer side in the width direction of the absorbent core 23, and are folds in which the absorbent core is not folded. However, in the modified example, the pair of front and rear folds FL are preferably provided in a region overlapping the absorbent core 23 and the absorbent core 23 is folded in the 1 st folded state.

The pair of width folds FW are preferably arranged at an interval in the front-rear direction L. It is preferable that width fold FW has 1 st width fold FW1 and 2 nd width fold FW 2. The 1 st width fold FW1 is the fold closest to the rear end edge 23R of the absorbent core 23 among the plurality of folds, and the 2 nd width fold FW2 is the fold closest to the front end edge 23F of the absorbent core 23 among the plurality of folds. In the modification, another fold extending in the width direction W may be disposed between the 1 st width fold FW1 and the 2 nd width fold FW 2. The 1 st width fold line FW1 and the 2 nd width fold line FW2 are lines that fold the absorbent article 1 so that the skin surface side T1 of the main body portion 20 is inside when the absorbent article is packaged (before use). The fold line can be determined by the position of the habitual bending, and when the habitual bending of the main body portion 20 is in a form that is difficult to determine, the position of the fold line is preferably determined with reference to the habitual bending of the cover sheet 40.

The absorbent article 1 of the embodiment is folded together in a state where the absorbent article 1 is disposed on the individual package sheet 41 and the release sheet 42 when individually packaged before use. As an example of the folded form, in an unfolded state in which the absorbent article 1 is disposed on the individual package sheet 41 and the release sheet 42, the flaps 25 are folded inward in the width direction W from the front and rear fold lines FL as a base point to be set to the 1 st folded state (see fig. 2). In the 1 st folded state, only the main body portion 20 is folded, and the cover sheet 40 and the post-treatment member 30 are not folded.

Next, the rear end edge of the absorbent article 1 is folded inward in the front-rear direction L with the 1 st width fold FW1 as a base point. Next, the front end edge side of the absorbent article 1 is folded inward in the front-rear direction L with the 2 nd width fold FW2 as a base point. The tip end of the region folded from the 2 nd width fold FW2 (specifically, the front end edge of the individual package sheet 41) is joined to the top of the individual package sheet 41 folded from the 1 st width fold FW1 by the tape member 45. By being folded in this manner, the absorbent article 1 is individually wrapped by the individual wrapping sheet 41. In the modification, the belt member 45 may not be provided.

Preferably, the topsheet 21 and the aftertreatment member 30 are not in contact with each other in a state where the absorbent article 1 is folded before use. In the absorbent article 1 of the present embodiment, the top sheet 21 is not disposed so as to cover the non-skin surface side T2 of the aftertreatment member 30 in the folded state before use, and the aftertreatment member 30 does not contact the top sheet 21 and the hook members 31 are not accidentally joined to the top sheet 21 in the folded state before use. In the case of a configuration in which the width fold is 3 or more and a configuration in which the aftertreatment member 30 is disposed across the width fold along the front-rear direction L, the top sheet 21 may be disposed so as to cover the non-skin surface side T2 of the aftertreatment member 30 in a state of being folded up before use. In such a configuration, it is preferable that the components constituting the absorbent article 1 be disposed between the hook member 31 and the topsheet 21. The constituent member is preferably a cover sheet 40, for example. In the folded state, since the constituent member is disposed between the front sheet 21 and the hook member 31, the front sheet 21 and the hook member 31 do not come into contact with each other. Thus, a failure that the hook member 31 is accidentally engaged with the surface sheet 21 before use can be suppressed.

Next, a disposal form of the absorbent article 1 using the post-treatment member 30 will be described with reference to fig. 7. Fig. 7 schematically shows an example of a disposal form of the absorbent article 1. The disposal form may be different depending on the user, and is not limited to the disposal form described below. In embodiment 1, the absorbent article 1 is rolled up along at least the front-rear direction L at the time of disposal.

Since excrement adheres to the top sheet 21 when the absorbent article 1 is discarded, the user may roll up the absorbent article 1 so that the skin surface side T1 of the main body portion 20 is inside and discard the absorbent article. At this time, as shown in fig. 7 (a) and 7 (b), the main body 20 and the aftertreatment member 30 are rolled up in the front-rear direction L from the front end edge or the rear end edge of the main body 20. The non-skin-surface-side T2 of the portion of the main body portion 20 at the starting end of rolling is in contact with the top sheet 21, and the absorbent article 1 is rolled up along the front-rear direction L. The hook member 31 protruding toward the non-skin surface side T2 is provided on the non-skin surface side T2 of the main body portion 20. When the main body 20 and the aftertreatment member 30 are further rolled up in the front-rear direction L from the state shown in fig. 7 (b), the hook member 31 comes into contact with the topsheet 21. The umbrella portion 312 of the hook member 31 is hooked on the fibers of the top sheet 21, and the hook member 31 is joined to the top sheet 21, so that the rolled-up state of the absorbent article 1 can be maintained. Therefore, the absorbent article 1 can be discarded in a clean state in which the surface to which the excrement adheres is inside by the post-treatment member 30. Since the hook members 31 can be engaged with the fibers of the surface sheet 21, the post-treatment member 30 and the surface sheet 21 can be joined even when the surface sheet 21 is wet due to the adhesion of bodily fluids such as menstrual blood and it is difficult to obtain a joining force between the adhesive part 50 and the surface sheet 21. In particular, after the adhesive part is adhered to underwear or the like, not only the joining force is reduced, but also the top sheet 21 is in a wet state, and therefore, the top sheet 21 and the adhesive part 50 are in a state in which joining is difficult, and therefore, they can be joined by the aftertreatment member 30. Further, the operation of engaging the hook members 31 of the post-treatment member 30 with the top sheet 21 can be performed during the process of rolling up the absorbent article 1, and there is no need for another operation such as pulling and engaging the post-treatment member 30. Therefore, even when the user discards the absorbent article without particular awareness, the rolled-up state of the absorbent article 1 can be maintained by the post-treatment member 30.

In the state where the absorbent article 1 is rolled up, the main body adhesive part 51 also abuts the topsheet 21. The body adhesive part 51 has a function of joining the body part 20 to a wearing article in use, and has an adhesive force even if weak after the body part 20 is detached from the wearing article. The main body adhesion part 51 is also bonded to the front surface sheet 21 in an auxiliary manner. Therefore, the post-treatment member 30 can be joined to the front sheet 21, and the main body adhesion part 51 can also be joined to the front sheet 21.

The absorbent article 1 of the present embodiment is configured such that the hook members 31 are easily engaged with the topsheet. Specifically, the absorbent article 1 of embodiment 1 is 50g/cm²In the pressed state under load (c), the thickness 21T (see fig. 5) of the surface sheet 21 is smaller than the thickness (see fig. 5) of the hook member 31. The thickness of the front sheet 21 is the thickness of the center sheet 21C in the region where only the center sheet 21C is disposed, the thickness of the side sheet 21S in the region where only the side sheet 21S is disposed, and the thickness of the center sheet 21C and the side sheet 21S in the laminated state in the region where the center sheet 21C and the side sheet 21S are laminated.

In the process of rolling up the absorbent article 1, the user applies a force to the absorbent article 1 to perform a rolling operation. The applicant has conducted intensive studies and, as a result, the force applied to the absorbent article 1 during the operation of rolling up the absorbent article 1 becomes at least 50g/cm². That is, the main body 20 and the aftertreatment member 30 are applied with the 50g/cm in the thickness direction T during the operation of rolling up the absorbent article 1²The main body 20 and the aftertreatment member 30 are pressed against each other in the region of contact. In the pressed state, the thickness of the surface sheet 21 is smaller than the thickness of the hook member 31, and at least a part of the hook member 31 penetrates the surface sheet 21. Due to the hook structureThe piece 31 penetrates the surface sheet 21, and the hook member 31 once caught on the fiber of the surface sheet 21 is hard to be pulled out, and once the hook member 31 is engaged with the surface sheet 21, the engaged state is easily maintained.

Applied with 50g/cm²The thickness of the surface sheet in a pressed state under load can be measured by the following method. First, a portion including the top sheet of the absorbent article is cut in a size of 70mm × 70 mm. In addition, in the case where it is difficult to acquire the size of 70mm × 70mm, the sheet is cut at the maximum size. Next, the adhesive was removed using toluene, and the sheet was decomposed into only surface pieces. The decomposed surface pieces were naturally dried for 24 hours to allow toluene to be emitted. Using an applicator of 50g/cm²The thickness of the load (for example, FS-60DS manufactured by Daorhiki Seisakusho K.K., measuring surface 44mm (diameter)), and the measurement pressure is 3g/cm²The measured pressure was improved to 50g/cm²) The thickness after pressing for 3 seconds was measured in a standard state (temperature 23. + -. 2 ℃ C., relative humidity 50. + -. 5%)), and the average of 5 measured values was defined as the thickness of the surface sheet. In the case where the surface sheet and the auxiliary sheet cannot be decomposed, the thickness is calculated from the ratio of the surface sheet to the auxiliary sheet using a microscope or the like after measurement in a state where the surface sheet and the auxiliary sheet are stacked.

In addition, for the applied voltage of 50g/cm²The thickness of the hook member in the pressed state under load of (1) is measured by detaching the post-treatment member from the main body and taking out only the post-treatment member. Using an applicator of 50g/cm²The thickness of the load (for example, FS-60DS manufactured by Daorhiki Seisakusho K.K., measuring surface 44mm (diameter)), and the measurement pressure is 3g/cm²The measured pressure was improved to 50g/cm²) The thickness after 3 seconds of pressurization was measured in a standard state (temperature 23. + -. 2 ℃ C., relative humidity 50. + -. 5%)), and the average of 5 measurements was defined as the thickness of the member for post-treatment. In the case where the hook member and the base sheet cannot be disassembled, the thickness of the post-treatment member is measured, and then the thickness is converted from the ratio of the base sheet to the hook member by using a microscope or the like.

In the pressed state, the thickness (length in the thickness direction) of the shaft portion 311 is preferably larger than the thickness of the surface sheet 21. In the pressed state, the thickness of the surface sheet 21 is smaller than the thickness of the shaft portion, at least a part of the shaft portion 311 of the hook member 31 penetrates the surface sheet 21, and the umbrella portion 312 penetrates the surface sheet 21. Since the umbrella part 312 of the hook member 31 penetrates the surface sheet 21, the umbrella part 312 of the fiber once hooked to the surface sheet 21 is hard to be pulled out, and once the hook member 31 is engaged with the surface sheet 21, the engaged state thereof is easily maintained.

The fiber length of the auxiliary sheet 24 is preferably longer than that of the surface sheet 21. The fibers of the auxiliary sheet 24 have a long fiber length, and are wound more in a state of being wound into the auxiliary sheet, so that the hook members 31 are easily entangled. Therefore, when the hook member 31 penetrates the top sheet 21 and reaches the auxiliary sheet 24, the engagement state between the fibers of the auxiliary sheet 24 and the hook member 31 is easily maintained. Further, the surface sheet 21 that contacts the skin has a short fiber length, and therefore can improve the skin feel. The fiber length is preferably the average of the fibers constituting the sheet, and the average of the fiber lengths of the auxiliary sheet 24 is preferably longer than the average fiber length of the surface sheet 21. In the case where the top sheet 21 has a multi-layer structure, the fiber length of the auxiliary sheet may be longer than the fiber length of any one layer of the top sheet 21. The fiber length of the auxiliary sheet 24 can be, for example, 30mm to 80mm, and preferably 50mm or less. When the fiber length of the auxiliary sheet 24 is 50mm or less, preferable liquid diffusibility can be secured. The fiber length of the top sheet 21 can be, for example, 10mm to 50mm, and preferably 30mm or less. When the fiber length of the top sheet 21 is shorter than 10mm, the fibers are difficult to be entangled with each other, and sufficient strength is not obtained, and there is a possibility that the absorbent article will not be able to meet the specifications. When the fiber length of the top sheet 21 is 50mm or more, each fiber is too thick, and there is a possibility that a feeling of discomfort may occur in terms of the tactile sensation of the skin. When the fiber length of the top sheet 21 is 30mm or less, the tactile sensation of the skin can be easily maintained. With this configuration, both the tactile sensation to the skin and the engaging force of the hook member can be obtained more effectively. The fiber length of the top sheet 21 of the present embodiment is 28mm, and the fiber length of the auxiliary sheet 24 is 44 mm.

Further, the fiber length and average fiber length of the fibers of the sheet were measured in accordance with JIS L1015: "determination of fiber length" in appendix a of 2010 "A7.1.1A method (standard method) for" determination of fiber length a7.1 "and" method for determining the length of each fiber on a glass plate with a scale ". The above method corresponds to the test method of ISO 6989 issued in 1981. The fiber length of the sheet in the present invention is preferably an average fiber length measured by the above-described method.

As shown in fig. 5, it is preferable that the front sheet 21 has a hole 21A penetrating therethrough in the thickness direction T. By inserting the hook member 31 into the hole 21A of the front surface sheet 21, the hook member 31 is more likely to enter the non-skin surface side T2, and the hook member 31 is more likely to be hooked on the front surface sheet 21. In a state where the absorbent article 1 is rolled up at the time of disposal, the hook member 31 may be inserted obliquely without being inserted perpendicularly to the topsheet 21. In the state where the absorbent article 1 is rolled up in this way, the hook member 31 is inserted into the hole portion of the top sheet 21, and the hook member 31 is hooked in the hole portion 21A, so that the state where the hook member 31 is joined to the top sheet 21 is more easily maintained.

The hole 21A of the front sheet 21 may penetrate the front sheet 21 in the thickness direction T, or may be a hole formed by cutting such as punching. The diameter of the hole portion is not limited, and is preferably larger than the diameter of the umbrella portion 312 of the hook member 31.

Preferably, the main body 20 is formed with a sheet compressing portion 211 that compresses at least the front sheet 21 in the thickness direction. The sheet compressing portion 211 preferably has a plurality of edge compressing portions 27 provided at positions outward in the front-rear direction of the absorbent core. The edge compressed portion 27 is preferably formed by compressing the front sheet 21 and the back sheet 22 in the thickness direction T. Further, the compressed portion in which the absorbent core 23 and the top sheet 21 are compressed together constitutes the core compressed portion 231, and constitutes the sheet compressed portion 211. In the present embodiment, the sheet compressing portion 211 in the region overlapping the absorbent core is compressed together with the absorbent core 23 and overlaps the core compressing portion 231. The core compressed portion 231 or the sheet compressed portion 211 has higher rigidity and a smaller thickness than the region where the core compressed portion 231 or the sheet compressed portion 211 is not formed.

The distance D211 (see fig. 1) between the sheet compressing portions 211 is preferably longer than the pitch P31 (see fig. 5) of the hook members 31. In the area between the sheet compressed part 211 and the sheet compressed part 211, there is a space between the fibers of the surface sheet 21 as compared with the area where the sheet compressed part 211 is formed, and the hook member 31 is easily hooked on the surface sheet 21. The area where the hook member 31 is likely to hook on the surface sheet 21 is longer than the pitch of the hook member 31, and it is easy to engage the hook member 31 with the surface sheet 21 without being aware of the position where the hook member 31 is fixed. The distance D211 between the sheet compressing portions is a distance of the sheet compressing portions 211 in a plan view. The pitch P31 of the hook members 31 is the distance between the centers of the adjacent hook members 31, and in the case of a hook member 31 having an umbrella portion 312, the pitch P31 of the hook member 31 is the distance between the centers of the adjacent umbrella portions 312.

The edge compression portion 27 is disposed at a position further outward in the front-rear direction L than the absorbent core 23. By providing the bending origin point formed by the edge compressed portion 27 in the vicinity of the edge in the front-rear direction of the absorbent article 1, the diameter of the main body portion at the rolling start end can be reduced, and the absorbent article 1 can be easily rolled up more compactly. Further, the distance D27 between the end edge compressed portions is preferably longer than the pitch P31 of the hook members 31. In the area between the end edge compressed portion and the end edge compressed portion, there is a space between the fibers of the surface sheet 21 as compared with the area where the end edge compressed portion is formed, and the hook member 31 is easily hooked on the surface sheet 21. The area where the hook member 31 is likely to hook on the surface sheet 21 is longer than the pitch of the hook member 31, and it is easy to engage the hook member 31 with the surface sheet 21 without being aware of the position where the hook member 31 is fixed. The distance D27 between the end edge compressed portions is the distance between the end edge compressed portions 27 in a plan view.

The front sheet 21 preferably has a plurality of recesses recessed in the thickness direction, and the plurality of recesses are preferably provided at intervals in the front-rear direction L. The concave portion is preferably composed of an opening portion formed in the surface sheet 21, a groove portion of a ridge portion formed in the surface sheet 21, a heat-bonded portion formed by thermally bonding fibers constituting the surface sheet 21, and a sheet-compressed portion 211 formed by compressing the surface sheet 21. The concave portion of the present embodiment is constituted by the sheet compressing portion 211. The interval between the recesses of the front sheet 21 is preferably longer than the pitch of the hook members 31. In the region between the recessed portions, there are gaps between the fibers of the surface sheet 21 as compared with the region in which the recessed portions are formed, and the hook members 31 are easily hooked on the surface sheet 21. The area where the hook member 31 is likely to hook on the surface sheet 21 is longer than the pitch of the hook member 31, and it is easy to engage the hook member 31 with the surface sheet 21 without being aware of the position where the hook member 31 is fixed.

As shown in fig. 6 (b), the edge compressed portion 27 as the sheet compressed portion 211 is preferably formed on the non-skin surface of the topsheet 21 so as to be recessed from the non-skin surface side T2 toward the skin surface side T1. The fibers in the region where the sheet compressed portion is formed are compressed, and the gaps between the fibers are reduced, so that the hook member 31 may be difficult to hook. In the case where the sheet compressed portion 211 is recessed from the non-skin surface side toward the skin surface side, a portion where the space between the fibers is small is formed on the non-skin surface of the topsheet 21. By disposing the surface on which the portion where the space between the fibers is small on the non-skin surface side, the joined state of the hook member 31 and the top sheet 21 inserted from the skin surface side T1 of the top sheet 21 is easily achieved.

The stretchable portion 26 is preferably disposed on the front side of the front end edge 30F of the aftertreatment member 30 and on the rear side of the rear end edge 30R of the aftertreatment member 30. That is, the front end edge 26F of the stretchable section 26 is located on the front side of the front end edge 30F of the aftertreatment member 30, and the rear end edge 26R of the stretchable section 26 is located on the rear side of the rear end edge 30R of the aftertreatment member 30. The stretchable part 26 of the present embodiment is provided in the rib mouth for preventing leakage, which is formed by the side sheet 21S and the elastic member 28. The stretchable part 26 extends in the front-rear direction L across the center of the main body part 20 in the front-rear direction. Fig. 8 is a view schematically showing the absorbent article 1 in a natural state. Further, the natural state refers to the following state: in the case of an absorbent article contained in a package, the absorbent article is taken out from the package and left for 24 hours in an atmosphere of 20 ℃. + -. 2 ℃ and a relative humidity of 60%. + -. 5% RH.

As shown in fig. 8, the stretchable and contractible portions 26 contract, and the absorbent article 1 in the natural state is curved in a side view. In particular, since the stretch units 26 of the rib-preventing openings are positioned closer to the skin surface side T1 than the absorbent core 23, the main body unit 20 is deformed in a curved shape so as to approach the skin surface side T1. The region on the front side of the front end edge 30F of the aftertreatment member 30 and on the rear side of the rear end edge 30R of the aftertreatment member 30 is less likely to be affected by the rigidity of the aftertreatment member 30 and is likely to contract. When the region on the front side of the front end edge 30F of the aftertreatment member 30 and the region on the rear side of the rear end edge 30R of the aftertreatment member 30 contract in the front-rear direction L in a state where the body portion is rolled up in the front-rear direction L and the hook members 31 are engaged with the surface sheet 21, the hook members 31 engaged with the surface sheet 21 move in the planar direction in the surface sheet 21, and the hook members 31 engage with the fibers of the surface sheet 21. Therefore, the absorbent article 1 can be cleanly discarded after use while maintaining the state in which the hook members 31 are joined to the top sheet 21.

In the case where the absorbent core 23 has a high basis weight portion in which the basis weight of the absorbent material is higher than the basis weight of the surrounding absorbent material, at least a part of the post-treatment member 30 is preferably disposed in a region overlapping with the high basis weight portion in a plan view. In the state where the absorbent article 1 is rolled up, as shown in fig. 7 (c), the absorbent core 23 is stacked in multiple layers. In this case, the portion where the high basis weight portion is arranged has a thickness greater than the surrounding thickness, and other layers stacked in the thickness direction are easily pressed. Therefore, in the region overlapping with the high basis weight portion, the aftertreatment member 30 can be pressed toward the front sheet 21, and the joined state of the hook member 31 and the front sheet 21 can be more easily achieved.

The flaps 25 are preferably folded inward in the width direction W before use so as to cover the skin-surface side T1 of the main body portion 20. According to this configuration, the absorbent article 1 can be rolled up in a state where at least a part of the topsheet 21 is covered with the flaps 25 by folding the flaps 25 inward in the width direction W at the time of disposal by utilizing the habitual folding of the flaps 25 (see fig. 7 (a)). By covering the topsheet 21 with the flaps 25 at the time of disposal, bodily fluids are less likely to adhere to the fingers of the user during disposal. Thus, the absorbent article 1 can be rolled up while suppressing the adhesion of body fluid. The flaps may be folded by the front and rear folding lines FL, or may be folded by folding lines independent of the front and rear folding lines FL. In other disposal forms, the absorbent article 1 may be rolled up without folding back the flaps 25 to the skin surface side T1 of the main body portion 20.

In a state where the flaps 25 are folded to the skin surface side T1 of the main body portion 20, at least a part of the aftertreatment member 30 preferably overlaps with the region sandwiched between the pair of flaps 25 in plan view. The flaps 25 are preferably folded at the base of the flaps in a state folded to the skin surface side T1 of the main body portion 20. In the present embodiment, as shown in fig. 2, the post-treatment member 30 is disposed in a region not overlapping the pair of wings 25 in a state where the pair of wings 25 are folded with the front and rear folding lines FL as a base point. When the absorbent article 1 is rolled up with the flaps 25 folded up to the skin surface side T1 of the main body 20 at the time of disposal, the hook members 31 are not joined to the topsheet 21 even if the aftertreatment member 30 comes into contact with the portion of the topsheet 21 covered with the flaps 25. However, by disposing at least a part of the hook member 31 in the region sandwiched by the pair of flaps 25 in a plan view, the topsheet 21 is exposed in the region between the folded flaps 25, and the aftertreatment member is joined to the topsheet 21 in this region.

In the case of a configuration having a pair of hip flaps, it is preferable that at least a part of the aftertreatment member 30 overlaps with a region sandwiched between the pair of hip flaps in a plan view in a state where the hip flaps are folded to the skin surface side T1 of the main body portion 20. The state in which the hip flap is folded onto the skin surface side T1 of the main body portion 20 is preferably a state in which the hip flap is folded from the proximal portion of the hip flap on the front side along a line extending in the front-rear direction L. Alternatively, the aftertreatment member 30 is preferably disposed in a region not overlapping the pair of hip flaps in a state where the pair of hip flaps are folded with the front and rear fold lines FL as a base point. According to this structure, the surface sheet 21 is exposed in the area between the folded hip flaps, and the aftertreatment member 30 is joined to the surface sheet 21 in this area.

The main body bonding portion 51 is preferably provided in a region extending in the width direction from the post-treatment member 30. The main body adhesive part 51 for joining the absorbent article and the wearing article during use is also joined to the topsheet 21 after use. The post-treatment member 30 can be joined to the surface sheet 21, and the main body adhesive part 51 can also be joined to the surface sheet 21. Even if there is a repulsive force due to the rigidity of the post-treatment member, the absorbent article can be cleanly discarded by the post-treatment member while maintaining the rolled-up state during the disposal.

The main body adhesion part 51 and the aftertreatment member 30 are preferably arranged with a gap in the width direction W. The main body adhesion part 51 and the post-treatment member 30 are less likely to interfere with each other, and defects such as accidental joining of the main body adhesion part 51 and the post-treatment member 30 before disposal can be suppressed. In the modification, the main body bonding portion 51 and the aftertreatment member 30 may be adjacent to each other in the width direction W. In this modification, the body bonding portion 51 and the hook member 31 are preferably arranged with a gap in the width direction W.

The aftertreatment member 30 may be provided in a size necessary for suppressing a feeling of discomfort when worn and securing a bonding force with respect to the topsheet 21. The length of the post-treatment member 30 in the front-rear direction L is preferably longer than the thickness of the absorbent core 23 and shorter than the length of the absorbent core 23 in the front-rear direction L, and the length of the post-treatment member 30 in the front-rear direction L in the present embodiment is 80 mm. Since the length of the aftertreatment member 30 in the front-rear direction L is longer than the thickness of the absorbent core 23, the aftertreatment member 30 and the topsheet 21 are prevented from coming into point contact with each other when the absorbent article 1 is rolled up, and the contact area between the aftertreatment member 30 and the topsheet 21 can be ensured. Further, since the length of the aftertreatment member 30 in the front-rear direction L is shorter than the length of the absorbent core 23 in the front-rear direction L, the stiffness of the aftertreatment member 30 is suppressed from being transmitted to the skin surface of the main body portion 20, and the uncomfortable feeling can be reduced. The length of the post-treatment member 30 in the width direction W is preferably 1mm or more and not more than the length of the absorbent core 23 in the width direction W. Since the length of the post-treatment member 30 in the width direction W is 1mm or more, the joining strength to the front sheet 21 is easily secured. Further, since the length of the post-treatment member 30 in the width direction W is smaller than the length of the absorbent core 23 in the width direction W, the body bonding portion 51 can be disposed in the width region, and the body 20 can be stably joined to the wearing article. More preferably, the length of the post-treatment member 30 in the width direction W is 5mm to 35mm, and the length of the post-treatment member 30 in the width direction W of the present embodiment is 15 mm. The post-treatment member 30 can be stably produced, and the body bonding portion 51 can be easily disposed in the core disposition region, and the body portion 20 and the worn article can be stably joined. The area of the aftertreatment member 30 is preferably less than 20% of the entire area of the main body 20. Since the area of the post-treatment member 30 having the hook member 31 is smaller than the area of the entire main body portion 20, the stiffness of the absorbent article 1 can be suppressed from increasing due to the post-treatment member 30, and the uncomfortable feeling during wearing can be suppressed.

The aftertreatment member 30 is preferably arranged across the body width center 20 CW. Can be joined at the body width center 20CW by the post-treatment member 30. Generally, the length of the body portion 20 in the front-rear direction L is longest at the body width center 20 CW. By engaging the portion of the main body portion 20 having the longest length in the front-rear direction L with the hook member 31, the entire region of the main body portion 20 in the front-rear direction L can be maintained in a rolled-up state. In general, when the absorbent article 1 is rolled up at the time of disposal, the absorbent article is rolled up with the body width center 20CW as a base point. At this time, since the post-treatment member 30 is present at a site serving as a base point, the post-treatment member 30 and the topsheet 21 can be unintentionally pressed in a direction facing each other during the operation of rolling up the absorbent article 1, and the hook members 31 can be joined to the topsheet 21.

(3) Absorbent article according to embodiment 2

Next, the absorbent article 1X of embodiment 2 will be described. Fig. 9 is a sectional view of the absorbent article 1X according to embodiment 2 with reference to the section a-a shown in fig. 1. In the following description of embodiment 2, the same reference numerals are used for the same components as those of embodiment 1 described above, and the description thereof is omitted.

The top sheet 21X of embodiment 2 has water-retentive fibers and thermoplastic resin fibers having a fiber length longer than the fiber length of the water-retentive fibers. Examples of the water-retentive fibers include cotton fibers and rayon fibers. The water-retentive fiber preferably has a fiber length of 10mm to 50 mm. Examples of the thermoplastic resin fiber include synthetic fibers such as Polyethylene (PE) and polyethylene terephthalate (PET). The thermoplastic resin fibers preferably have a fiber length of 30mm to 60 mm.

The thermoplastic resin fibers are thermally bonded and arranged in a state of being crimped into a sheet. Further, since the thermoplastic resin fibers have a relatively long fiber length, the hook members 31 are wound more in a crimped state and are easily entangled. The hook members 31 are easily hooked on the thermoplastic resin fibers, and the state in which the hook members 31 are joined to the surface sheet 21 is easily maintained.

The top sheet 21 has water-retentive fibers and is likely to be in a wet state after absorption of body fluid. The water-retentive fibers in a wet state are relatively easy to be loosened from before wetting, and the top sheet 21 becomes soft and is easily deformed when the absorbent article 1 is rolled up. Therefore, when the absorbent article 1X is rolled up, the rolled-up state of the absorbent article 1X is easily maintained at the time of disposal. The surface of the top sheet 21 in a wet state is flat and is folded so that the skin surface side T1 of the absorbent article is on the inside, and when the top sheet 21 and the back sheet 22 are brought into contact, the contact area between the top sheet 21 and the back sheet 22 can be secured. The state where the front sheet 21 and the back sheet 22 are in contact with each other is easily maintained, and the state where the absorbent article 1X is rolled up at the time of disposal is easily maintained.

The front sheet 21X preferably has a heat-bonded portion 29 of thermoplastic resin fibers. The hook members 31 are easily hooked on the thermal bonding portions 29 of the thermoplastic resin fibers, easily maintain the state where the front sheet 21 and the back sheet 22 are in contact with each other, and easily maintain the rolled-up state of the absorbent article 1X during disposal.

The top sheet 21 preferably has a 1 st layer having at least water-retentive fibers and a 2 nd layer having at least thermoplastic resin fibers, the 2 nd layer being disposed on the non-skin surface side of the 1 st layer. The center sheet 21CX according to embodiment 2 is composed of a laminate sheet of the 1 st layer 21C1 containing 100% cotton fibers and the 2 nd layer 21C2 containing 80% cotton fibers and 20% thermal adhesive fibers. The 1 st layer 21C1 is formed by water-retention fiber water flow interlacing. In the modification, the surface sheet 21X may be formed of 1 layer, and the 1-layer surface sheet 21 may have both water-retentive fibers and thermoplastic resin fibers. The side sheet 21S of the top sheet 21X may include the 1 st layer and the 2 nd layer.

At 50g/cm²In the pressed state under the load of (3), the thickness of the 1 st layer 21C1 is preferably smaller than the thickness of the hook member 31. In the pressed state, the thickness of the 1 st layer 21C1 is thinner than the thickness of the hook member 31, and at least a part of the hook member 31 penetrates the 1 st layer 21C1 and engages with the 2 nd layer 21C 2. The hook members 31 hooked to the thermoplastic resin fibers of the 2 nd layer 21C2 are difficult to pull out, and once the hook members 31 are engaged with the surface sheet 21X, the engaged state thereof is easily maintained.

An example of a method for manufacturing the center piece 21CX will be described. First, a 2 nd fibrous web corresponding to the 2 nd layer 21C2 was formed using a 1 st card. The No. 1 card is a dry roller card using a single card (Japanese: シングルカード) or a double card (Japanese: ダブルカード) which are commonly used in the formation of fibrous webs. The 2 nd fibrous web contains water-retentive fibers and hydrophobic fibers. Next, a 1 st fibrous web corresponding to the 1 st layer 21C1 was formed using a 2 nd carding machine. The No. 2 card is also a dry roller card similar to the No. 1 card. The 1 st fibrous web contains water-retentive fibers. The 1 st fibrous web is layered on the 2 nd fibrous web being conveyed by the conveying device. Thereby, a composite fiber web having a two-layer structure in which the 1 st fiber web and the 2 nd fiber web are stacked is formed. Further, the ratio of each fiber in each fibrous web can be controlled at the ratio of the raw material fiber supplied to each carding machine. Next, the composite fiber web having the double-layer structure is subjected to a hydraulic jet treatment by a hydraulic jet treatment machine, and the fibers are entangled with each other. Thereby, the 1 st continuous sheet (spunlace nonwoven fabric) was formed. Here, the water jet treatment is as follows: the composite fiber web is placed on a continuously moving mesh belt, and a high-pressure water jet is jetted from the upper surface side of the composite fiber web to interlace fibers. Thereafter, the 1 st continuous sheet having passed through the hydrajetting processor was dried by a dryer. The dried 1 st continuous sheet is conveyed in the conveying direction by the conveying device to be a continuous body constituting the center sheet 21 CX. In the center sheet 21CX thus configured, the proportion of the water-retentive fibers in the 1 st layer 21C1 is higher than the proportion of the water-retentive fibers in the 2 nd layer 21C2, and the proportion of the thermoplastic resin fibers in the 1 st layer 21C1 is lower than the proportion of the thermoplastic resin fibers in the 2 nd layer 21C 2.

The present invention has been described in detail with reference to the above embodiments, but it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented in a modified form and a modified form without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Claims

1. An absorbent article having:

a front-back direction;

a width direction orthogonal to the front-rear direction;

a main body section having a front sheet, a back sheet, and an absorbent core, the front sheet having fibers; and

a post-treatment member disposed on the non-skin surface side of the main body portion and having a hook member protruding toward the non-skin surface side,

in the absorbent article, it is preferable that,

at 50g/cm²In a pressed state under a load, the thickness of the surface sheet is smaller than the thickness of the hook member,

the hook member is configured to be engageable with the topsheet in a folded state with the skin surface side of the absorbent article being on the inside.

2. The absorbent article of claim 1,

the main body section has an auxiliary sheet having fibers and disposed between the topsheet and the absorbent core,

the auxiliary sheet has a fiber length longer than that of the surface sheet.

3. An absorbent article having:

a front-back direction;

a width direction orthogonal to the front-rear direction;

a main body section having a front sheet, a back sheet, and an absorbent core; and

in the absorbent article, it is preferable that,

the surface sheet has: water-retaining fibers; and thermoplastic resin fibers having a fiber length longer than that of the water-retentive fibers,

4. The absorbent article according to claim 3,

the surface sheet has a thermally bonded portion of the thermoplastic resin fiber.

5. The absorbent article according to claim 3 or 4, wherein,

the surface sheet has: a 1 st layer having at least the water-retentive fibers; and a 2 nd layer which is disposed on a non-skin surface side of the 1 st layer and has at least the thermoplastic resin fiber,

at 50g/cm²The thickness of the 1 st layer is smaller than the thickness of the hook member in a pressed state under a load of (1).

6. The absorbent article according to any one of claims 1 to 4, wherein,

the main body portion has an extendable portion that extends and contracts in the front-rear direction,

the stretchable portion is disposed at least on the front side of the front end edge of the aftertreatment member and on the rear side of the rear end edge of the aftertreatment member.

7. The absorbent article according to any one of claims 1 to 4, wherein,

the front sheet is formed with a hole penetrating in the thickness direction.

8. The absorbent article according to any one of claims 1 to 4, wherein,

a plurality of sheet compressing parts formed by compressing at least the surface sheet along the thickness direction,

the sheet compressing portions are spaced apart from each other by a distance longer than a pitch of the hook members.

9. The absorbent article of claim 8,

the sheet compressing portion is formed on the non-skin surface of the top sheet and is recessed from the non-skin surface side toward the skin surface side.

10. The absorbent article according to any one of claims 1 to 4, wherein,

the hook member has: a shaft portion extending toward the non-skin surface side; and an umbrella part extending in a plane direction at a tip end of the shaft part,

at 50g/cm²The thickness of the shaft portion is larger than the thickness of the surface sheet in a pressed state under the load (2).