TWI770340B - absorbent articles - Google Patents

Abstract

An absorbent article (1) is provided with a surface sheet (10) and an absorbent core (20) arranged on the non-skin-facing surface side of the surface sheet (10). A topsheet (10) is provided with a first topsheet (11) containing non-thermofusible fibers, and a second topsheet (12) positioned on the non-skin-facing surface side of the first topsheet (11). The outer edge (11E) in the width direction (W) of the first topsheet (11) is disposed on the skin-opposing surface side of the second topsheet (12). A junction region (RX) where the first topsheet (11) and the second topsheet (12) are joined is provided. On the outer edge of the first topsheet (11), a free end portion (15) that is not joined to the second topsheet (12) is provided.

Description

absorbent articles

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

In Patent Document 1, absorbent articles such as sanitary napkins are disclosed. In the absorbent article of Patent Document 1, a plurality of top sheets are provided on the skin-facing surface side of the absorbent core. The topsheet includes a first topsheet (the topsheet of Patent Document 1) and a second topsheet (the thermally fusible fiber sheet of Patent Document 1) overlapping the first topsheet in the thickness direction. The first surface sheet is formed of a non-woven fabric (specifically, a cotton non-woven fabric) containing non-thermofusible fibers. The first cover sheet is joined to the second cover sheet by many embossings. Thereby, since the non-thermofusible fibers are bonded to the second surface sheet, the non-thermofusible fibers can be prevented from falling off. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Invention Patent No. 5074913

[Problems to be Solved by Invention]

In the absorbent article of Patent Document 1, the outer edge of the first surface sheet is joined to the back sheet on the outer side in the width direction than the absorbent core (see FIG. 2 of Patent Document 1). The outer edge of the first top sheet joined to the back sheet has high rigidity, so when the wearer walks, etc., the wearer's feet rub against the outer edge of the first top sheet, and the wearer's skin The problem of tactile deterioration.

Therefore, an absorbent article which can suppress the deterioration of the wearer's skin touch while suppressing the detachment of the non-thermofusible fibers is highly desired. [means to solve the problem]

An absorbent article of one form includes: a front-back direction, a width direction orthogonal to the front-rear direction, a surface sheet, and an absorbent core disposed on the non-skin-facing surface side of the surface sheet; the surface sheet, It is provided with: a first topsheet containing non-thermofusible fibers, and a second topsheet located on the non-skin-facing surface side of the first topsheet; the outer edge of the first topsheet in the width direction is disposed on the On the skin-facing surface side of the second topsheet, a joint region where the first topsheet and the second topsheet are joined is provided, and on the outer edge of the first topsheet, there is provided: The free end of the faceplate joint.

(1) Outline of Embodiment From the description of this patent specification and the attached drawings, at least the following matters will be clarified.

An absorbent article of one form includes: a front-back direction, a width direction orthogonal to the front-rear direction, a surface sheet, and an absorbent core disposed on the non-skin-facing surface side of the surface sheet; the surface sheet, It is provided with: a first topsheet containing non-thermofusible fibers, and a second topsheet located on the non-skin-facing surface side of the first topsheet; the outer edge of the first topsheet in the width direction is disposed on the on the skin-facing surface side of the second top sheet; provided with: a joint region where the first top sheet and the second top sheet are joined; and on the outer edge of the first top sheet, provided with: not connected to the second top sheet The free end of the sheet engagement.

According to this aspect, since the non-thermofusible fibers contained in the first surface sheet are bonded to the second surface sheet in the bonding region, the non-thermofusible fibers can be prevented from falling off. Since the free end portion is provided on the outer edge of the first top sheet, the rigidity of the outer edge of the first top sheet does not increase, and the deterioration of the wearer's skin texture can be suppressed.

According to a preferred aspect, the distance in the width direction between the joining region and the outer edge of the first surface sheet is shorter than the fiber length of the non-thermofusible fibers.

The absorbent article of Japanese Patent Application Laid-Open No. 10-118118 has the surface sheet folded in the width direction. The folded portion of the top sheet is not joined to the sheet located on the non-skin-facing surface side of the top sheet, and is configured to stand up toward the wearer's side. The front end of the folded portion is arranged to face the outer side in the width direction. The folded portion is constructed so as to stand up toward the wearer's side, and is arranged between the feet when wearing. Therefore, when the wearer is walking or the like, the front end of the folded portion of the top sheet may be rubbed by the wearer's foot. As the surface sheet is repeatedly rubbed by the foot, there is a risk that the fibers constituting the surface sheet may fall off. In particular, as in Japanese Patent Application Laid-Open No. 10-118118, in a sheet containing non-thermofusible fibers, since the fibers are not thermally fusible, the fibers tend to fall off more easily. Therefore, the absorbent article which can suppress the fall-off of the non-thermofusible fiber located in the outer edge of the width direction of a top sheet is desired.

According to the above-mentioned preferred embodiment, the distance in the width direction between the bonding region and the outer edge of the first surface sheet is shorter than the fiber length of the non-thermofusible fibers, so that at least a part of the non-thermally fusible fibers tends to be The joining area is joined. Therefore, the non-thermofusible fibers can be held by the joining region, and when the outer edge of the first surface sheet is rubbed, the non-thermofusible fibers can be prevented from falling off.

According to a preferable aspect, the press part which compresses the said 1st surface sheet and the said 2nd surface sheet is provided in the said junction area.

According to the press section, not only the bonding between the non-skin-facing surface side of the first topsheet and the skin-facing surface side of the second topsheet, but also over a certain range extending in the thickness direction of the first topsheet, the first topsheet can be easily joined. Therefore, in the joining region, the non-thermofusible fibers are more likely to be joined to the second surface sheet.

According to a preferable form, the said press part is arrange|positioned at intervals in the said front-back direction or the said width direction.

Compared with the structure in which the press section is continuously arranged, the rigidity of the outer edge of the first topsheet is lowered, and the outer edge of the first topsheet can easily follow the movement of the foot. Therefore, the friction between the outer edge of the first topsheet and the foot is suppressed, and the non-thermofusible fibers of the first topsheet can be suppressed from falling off.

According to a preferable aspect, the adhesive agent which adheres the said 1st surface sheet and the said 2nd surface sheet is provided in the said bonding area|region.

In the configuration in which the first surface sheet and the second surface sheet are bonded by an adhesive, it is difficult to apply heat or pressure to the first surface sheet at the time of bonding. Therefore, the breakage of the non-thermally fused fibers due to heat or the like at the time of joining is suppressed, and the fibers of the first surface sheet can be further suppressed from falling off.

According to a preferable form, the said 1st surface sheet contains heat fusion|melting fiber.

Since the first surface sheet contains the thermally fusible fibers, a fused portion is formed between the fibers by the fusing of the thermally fusible fibers, and the non-thermally fusible fibers are less likely to fall off.

According to a preferable form, the said 2nd surface sheet contains a heat fusion|melting fiber.

Since the second surface sheet contains the thermally fusible fibers, a fused portion is formed between the fibers by the fusion of the thermally fused fibers, and the non-thermally fused fibers of the first surface sheet are caught in the fused portion, making it difficult to fall off.

According to a preferred aspect, a side sheet covering the outer edge of the absorbent article is disposed on the non-skin-facing surface side of the second top sheet, and the outer edge of the second top sheet is located more than the first surface The outer edge of the sheet is closer to the outer side in the width direction, and has a side non-bonding region where the outer edge of the second surface sheet and the side sheet are not bonded.

The outer edge of the second cover sheet is located on the outer side in the width direction than the first cover sheet, and stands up with respect to the side sheet in the side non-bonding region. Therefore, when pinched by the wearer's foot, the outer edge of the second top sheet is more likely to come into contact with the foot than the outer edge of the first top sheet. Furthermore, it is possible to prevent the non-thermofusible fibers from falling off due to friction between the outer edge of the first surface sheet and the foot.

According to a preferred aspect, the second top sheet is folded based on the folds along the front-rear direction, and the creases are provided on the outer edge of the second top sheet.

Since the second top sheet is folded, it is liable to be deformed based on the crease when it comes into contact with the wearer's foot. By the deformation of the second topsheet, the feel to the first topsheet is relieved, and the fall-off of the non-thermofusible fibers of the first topsheet can be suppressed.

According to a preferred aspect, the outer edge of the first surface sheet is located on the inner side in the width direction than the outer edge of the absorbent core.

When pinched by the wearer's foot, the outer edge of the absorbent core tends to come into contact with the foot earlier than the outer edge of the first topsheet. Furthermore, it is possible to prevent the non-thermofusible fibers from falling off due to friction between the outer edge of the first surface sheet and the foot.

According to a preferable aspect, at least a press section is provided in which the first surface sheet and the second surface sheet are compressed in the thickness direction.

The free end portion of the first surface sheet is easy to move with respect to the plane direction, and can move toward the press portion side when compressed in the thickness direction when the press portion is formed. Therefore, when the press section is formed, the force applied to the stretching direction of the first surface sheet can be reduced, and the cracking of the first surface sheet can be suppressed.

According to a preferable aspect, the said press part compresses the said 1st surface sheet, the said 2nd surface sheet, and the said absorption core.

In the structure in which the first surface sheet, the second surface sheet and the absorbent core are compressed, compared with the structure in which only the first surface sheet and the second surface sheet are compressed, the degree of compression is stronger, and the first surface sheet is more easily torn. Therefore, it is preferable to suppress the breakage of the first surface sheet by the free end portion.

According to a preferred form, the free end portion is overlapped with the absorption chip in the thickness direction.

Since the press part is formed in the absorbent core, and the free end is overlapped with the absorbent core, the press part and the free end can be easily arranged in close proximity. By arranging the free end portion for alleviating the force in the stretching direction, it is placed close to the press section, and the ripping of the first surface sheet can be further suppressed.

According to a preferred aspect, the free end portion includes the outer edge in the width direction of the first surface sheet and extends in the front-rear direction.

By providing the free end portion on the outer edge of the first cover sheet, the area of the free end portion can be easily secured, and the breakage of the first cover sheet can be suppressed.

According to a preferable aspect, the said press part is recessed toward the said 2nd surface sheet side from the 1st surface sheet side.

The force compressed by the press section is applied from the first top sheet to the second top sheet side. Since the free end portion is provided on the side where the force is applied (skin-opposing surface side), the force in the stretching direction is further alleviated, and the breakage of the first surface sheet can be suppressed.

According to a preferred embodiment, the elongation of the second topsheet is higher than the elongation of the first topsheet.

Since the elongation of the second cap sheet is higher than that of the first cap sheet, when the first cap sheet is used and a sheet with a lower elongation ratio is used, the decrease in the overall elongation of the cap sheet can be suppressed, and the first cap sheet can be reduced. Fragmentation of flakes.

According to a preferred embodiment, the bonding region having the adhesive for adhering the first surface sheet and the second surface sheet is provided inside the free end portion, and the bonding region is provided at a plurality of locations at intervals.

In the bonding area, the first surface sheet and the second surface sheet are bonded; in the area between the bonding areas, the first surface sheet and the second surface sheet are not bonded. Therefore, there are a portion that is easy to move when a tensile force is applied (the region between the adjoining regions), and a portion that is difficult to move (the adjoining region). When a tensile force is applied, the part that is easy to move moves based on the part that is difficult to move. By providing a plurality of these regions, the force in the stretching direction can be more relaxed over a wide range of the first cover sheet 11, and the breakage of the first cover sheet can be suppressed.

According to a preferable aspect, the said press part has the 1st press part arrange|positioned at the said free end part.

When the first press section is formed at the free end, the first press section is formed by compressing the region where the first topsheet and the second topsheet are not joined. Since the first cap sheet and the second cap sheet are not joined at least around the first press section, the force acting in the drawing direction of the first cap sheet can be alleviated. Therefore, the cracking of the first surface sheet can be further suppressed.

According to a preferred aspect, the first press section spans the free end portion and an area closer to the outside than the first surface sheet.

Compared with the configuration in which the entire area of the first press section is formed in the first surface sheet, the force acting in the stretching direction of the first surface sheet can be alleviated when the first press section is formed. Therefore, the cracking of the first surface sheet can be further suppressed.

According to a preferred embodiment, in a plan view, a pair of the press sections are arranged at intervals, and the distance between the pair of press sections is not constant.

In the part where the press sections are widely spaced from each other, since the length of the first surface sheet located in this part is long, the force in the stretching direction during the formation of the press section is weak. On the other hand, since the length of the 1st surface sheet located in the part where the space between the press sections is narrow is short, the force in the stretching direction during the formation of the press section is stronger. Since the part where the tensile force acts strongly and the part where the tensile force is weak coexist, the applied force is not concentrated compared with the case where the force is applied equally, and the cracking of the first surface sheet can be suppressed.

(2) Configuration of the absorbent article according to the first embodiment Hereinafter, the absorbent article according to the first embodiment will be described with reference to the drawings. Absorbent articles can be sanitary napkins for physiological use, daily cotton pads, breast milk cotton pads, adult incontinence cotton pads, fecal cotton pads or absorbent articles like sweat-absorbing sheets. In particular, the absorbent article can be used by being attached to the inner side of a wearing article such as a user's underwear.

In addition, in the description of the following drawings, the same or similar parts are indicated with the same or similar symbols. However, it should also be noted that the drawings are shown schematically, and the ratios of various dimensions may be different from reality. Therefore, specific dimensions and the like should be judged with reference to the following description. In addition, there may be cases where the relationship or ratio of the dimensions is different between the drawings.

Fig. 1 is a plan view of the absorbent article 1 of the first embodiment viewed from the skin-opposing surface side. Here, "the side facing the skin" corresponds to the side facing the wearer's skin during use. "Non-skin facing side" means the side facing the opposite side of the wearer's skin during use. Fig. 2 is a sectional view taken along the line A-A shown in Fig. 1, and Fig. 3 is an enlarged view of part B shown in Fig. 2. Fig. 4 is a plan view showing a bonding region and a sheet press portion of the absorbent article according to the first embodiment.

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

The absorbent article 1 includes a front region R1, a rear region R2, and a center region R3. The central region R3 includes an excretory port abutting portion R33 facing the wearer's excretory port (for example, a body port). When the absorbent article 1 is attached to the underpants, the central region R3 is located in the lower part of the underpants. That is, the excretion port abutting portion R33 is disposed under the wearer's buttocks, that is, in the region between the wearer's feet.

The anterior domain R1 is located further anterior than the central domain R3. The front end edge of the front side region R1 regulates the front end edge of the absorbent article 1 . The rear domain R2 is located closer to the rear than the central domain R3. The rear end edge of the rear side region R2 regulates the rear end edge of the absorbent article 1 . The length in the front-rear direction L of the rear side region R2 may be longer than the length in the front-rear direction L of the central region R3.

In the central region R3, the flanks 3 to be described later can be provided. Moreover, in the rear side region R2, the buttock-side wing portion 4 that swells to the outer side in the width direction W may be provided. The front end edge of the side flap 3 is defined by the base portion of the side flap 3, and among the two parts recessed most toward the inner side in the width direction W, it corresponds to the part located on the front side. The front edge of the side flap 3 can also define the boundary between the central region R3 and the front side region R1. The rear end edge of the side flap 3 is defined by the base portion of the side flap 3, and among the two parts recessed most toward the inner side in the width direction W, corresponds to the part located on the rear side. The rear edge of the lateral wing 3 can also define the boundary between the central region R3 and the rear side region R2.

The absorbent article 1 includes a top sheet 10 facing the wearer's skin, a back sheet 14 facing the wearer's skin on the opposite side, and an absorbent core 20 disposed between the top sheet 10 and the back sheet 14 . The surface sheet 10 is provided on the skin-facing surface side T1 rather than the absorbent core 20 . The back sheet 14 is provided on the non-skin-facing surface side T2 of the absorbent core 20 . The absorption chip 20 is disposed between the surface sheet 10 and the back sheet 14 .

The surface sheet 10 is a liquid-permeable sheet that penetrates liquids such as bodily fluids. The surface sheet 10 can cover the central portion of the absorbent core 20 located in the width direction W. As shown in FIG. The surface sheet 10 may extend in the front-rear direction L from the front-side region R1 to the rear-side region R2. The top sheet 10 may include a first top sheet 11 and a second top sheet 12 located on the non-skin-facing surface side of the first top sheet 11 .

The first surface sheet 11 contains non-thermofusible fibers. Non-thermofusible fibers can be exemplified by cotton fibers. The first surface sheet 11 is formed by intertwining of non-thermofusible fibers. The fiber length of the cotton fiber is, for example, 10 to 80 mm. When the fiber length of the cotton fiber is less than 10 mm, the fiber length is too short, and it becomes difficult for the fibers to intertwine with each other, and there is a possibility that sufficient strength cannot be obtained. When the fiber length of the cotton fiber exceeds 80 mm, some of the fibers may extend in the width direction, and the fibers may cross from the edge of the wearer's thigh to the edge of the other thigh. At this time, the liquid excretion adhering to the central portion in the width direction W of the absorbent article 1 spreads to both legs by the liquid diffusion effect of the water-retaining fibers, which may cause discomfort to the wearer. The fiber length is preferably 15 to 60 mm, more preferably 20 to 40 mm. The basis weight (unit weight) of the cotton nonwoven fabric is 20 to 150 g/m ² . In addition, the first surface sheet 11 may have a two-layer structure. The lower layer of the first surface sheet 11 may have thermally fusible fibers. The elongation at break of the first surface sheet 11 may be 30 to 60 N/25mm in strength along the orientation direction of the fibers; it may also be set in the heddle eye that aligns the orientation direction of the fibers with the orthogonal direction After it is 20 mm, it is measured under the setting condition of the tensile speed of 100 mm/min, and the strength at break is 5 to 10 N/25 mm.

The second surface sheet 12 contains thermally fusible fibers. The second surface sheet 12 is formed by fusing the thermally fused fibers. The surface sheet 10 may further include side sheets 13 . The side sheet 13 extends outside the width direction of the first cover sheet 11 and the second cover sheet 12 . The side sheet 13 is disposed on the non-skin facing surface side of the first top sheet 11 and the second top sheet 12 , and does not cover the first top sheet 11 and the second top sheet 12 .

As shown in FIG. 3 , the first surface sheet 11 and the second surface sheet 12 are laminated in the thickness direction T. As shown in FIG. The first cover sheet 11 and the second cover sheet 12 can be joined together in the joining region RX. In the area where the first topsheet 11 and the second topsheet 12 overlap, there are provided: a junction area RX where the first topsheet 11 and the second topsheet 12 are joined, and the first topsheet 11 and the second topsheet 12 are not provided. The bonded non-bonded region RY. At least a part of the non-bonding region RY constitutes a free end portion 15 to be described later. The surface sheet 10 may further include side sheets 13 . The side sheet 13 extends outside the width direction of the first cover sheet 11 and the second cover sheet 12 . The side sheet 13 covers the outer edge of the absorbent article. The side sheet 13 is arranged on the non-skin facing surface side of the first top sheet 11 and the second top sheet 12 , and does not cover the first top sheet 11 and the second top sheet 12 .

The back sheet 14 is a liquid-impermeable sheet. As the back sheet 14, a laminated non-woven fabric mainly composed of polyethylene sheet, polypropylene, or the like, a breathable resin film, or a non-woven fabric such as spunbond or spunlace bonded to a breathable resin film can be used. of flakes, etc.

The absorption chip 20 is disposed in at least the central region R3 and the rear region R2. In addition, the absorption chip 20 may extend from the central region R3 to the front region R1. The absorbent core 20 contains absorbent material for absorbing liquid. The absorption chip 20 can also be covered by a chip adhesive film. The absorbent material constituting the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp and superabsorbent polymer (SAP). The chip adhesive film, for example, can be made of non-woven fabric or fiber paper sheet.

As described above, the absorbent article 1 includes the side flaps 3 and the buttock side flaps 4 . The side flaps 3 and the buttock side flaps 4 are located in the center region R3 and extend outward in the width direction W from the outer edge of the absorbent core sheet 20 in the central region R3. The side flaps 3 and the buttock side flaps 4 are constituted by lamination of the top sheet 10 and the back sheet 14 . The side flaps 3 can be folded on the back sheet 14 side. The side flaps 3 are folded over on the non-skin-facing side of the lower part of the crotch of the underwear when in use.

The buttock-side wing portion 4 is located closer to the rear side than the side wings 3, and is provided in the rear-side region R2. The buttock side flaps 4 are not folded during use, and are disposed between the underwear and the buttocks of the wearer. In this embodiment, the absorbent material is not provided in the buttock side flaps 4 . Instead, an absorbent material may be provided in the buttock side flaps 4 .

On the outer edge of the first cover sheet 11, a free end portion 15 that is not joined to the second cover sheet is provided. The free end portion 15 may be a region where the non-skin-opposing surface of the first topsheet 11 and the skin-opposing surface of the second topsheet 12 are not joined, and the adhesive region RA is not provided, and the sheet press portion 18 is not provided. area. Moreover, in the structure which does not have the sheet press part 18, the free end part 15 may be the area|region where the bonding area|region RA is not provided. In addition, the outer edge is the peripheral edge of the member, and includes the front end edge and the rear end edge in the front-rear direction, and the outer edge in the width direction.

In the bonding region RX, the non-thermofusible fibers contained in the first surface sheet 11 are bonded to the second surface sheet 12, so that the non-thermofusible fibers can be hard to fall off. Since the free end portion 15 is provided on the outer edge of the first topsheet 11, the rigidity of the outer edge 11E of the first topsheet 11 does not increase, and the deterioration of the wearer's touch can be suppressed.

Next, the structure which suppresses the fall-off of the non-thermofusible fiber of the surface sheet 10 of the absorbent article 1 comprised in this way is demonstrated. Since the outer edge 11E in the width direction of the first topsheet 11 is disposed on the skin-facing side of the second topsheet 12, the outer edge 11E of the first topsheet 11 may be rubbed by the wearer's foot during wearing. Compared with the thermally fusible fibers, the non-thermofusible fibers are not fused by heat, and the bonds between the fibers tend to be weakened. Therefore, when the first surface sheet 11 containing the non-thermofusible fibers is rubbed against the wearer's feet, the non-thermofusible fibers may fall off. The absorbent article 1 is configured to suppress the fall-off of the non-thermofusible fibers located in the surface sheet provided with the non-thermofusible fibers (the first surface sheet 11 in the present embodiment).

In a region where the first topsheet 11 and the second topsheet 12 overlap, a junction region RX where the first topsheet 11 and the second topsheet 12 are joined is provided. The distance between the bonding region RX and the width direction W of the outer edge 11E of the first topsheet 11 is shorter than the fiber length of the non-thermofusible fibers. Therefore, at least a part of the non-thermofusible fibers are joined in the joining region RX. The non-thermofusible fibers can be held by the bonding region RX, and when the outer edge 11E of the first surface sheet 11 is rubbed, the non-thermofusible fibers can be prevented from falling off. In addition, it is preferable that the junction region RX extends in the front-rear direction L. The bonding region RX is provided over the entire front-to-back direction of the first topsheet 11 to effectively prevent the non-thermofusible fibers from falling off.

The bonding region RX is located on the inner side in the width direction W than the outer edge 11E of the first surface sheet 11 . A non-bonding region RY extending inward in the width direction W is provided from the outer edge 11E of the first topsheet 11 . The distance between the bonding region RX and the width direction W of the outer edge 11E of the first surface sheet 11 is the length of the width direction W of the non-bonding region RY.

Next, the bonding region RX of the present embodiment will be described in detail. FIG. 4 shows the bonding area RA of the first topsheet 11 and the second topsheet 12 , and the sheet press section 18 . Actually, the continuation area RA and the sheet press section 18 are overlapped in the thickness direction T, but for convenience of description, they are shown in a state adjacent to each other in the front-rear direction. The bonding region RX is a region where the first surface sheet 11 and the second surface sheet 12 are bonded, and specifically, the region where the sheet press section 18 and the bonding region RA overlap in the thickness direction T, including: only the sheet press section is provided The area of 18, and the area where only the following area RA is provided. The non-bonding region RY is a region in which the sheet press section 18 is not provided, and the junction region RA is not provided. In addition, in another form, the joining area RX may be comprised by the area|region which provided only the press part, and may be comprised by the area|region where only the bonding area|region was provided.

In the junction area RX, a sheet press section 18 for compressing (pressure-bonding) the first topsheet 11 and the second topsheet 12 may be provided. The sheet press section 18 not only joins the non-skin-opposing surface of the first topsheet 11 and the skin-opposing surface of the second topsheet 12, but also spans a certain range of the first topsheet 11 extending in the thickness direction, so that the The top sheet 11 is joined to the second top sheet 12 . Therefore, in the joining region RX, the non-thermofusible fibers are joined to the second surface sheet 12, and the fall-off of the non-thermofusible fibers can be further suppressed.

In addition, the sheet press section 18 may be arranged in plural places at intervals in the front-rear direction L or the width direction W. The sheet press section 18 according to the present embodiment extends in the front-rear direction L, and is arranged at intervals in the width direction W. As shown in FIG. Compared with the configuration in which the sheet presses 18 are continuously arranged, the rigidity of the outer edge 11E of the first topsheet 11 is lowered, and the outer edge 11E of the first topsheet 11 can easily follow the action of the engaging leg. Therefore, the friction between the outer edge 11E of the first topsheet 11 and the foot can be suppressed, and the non-thermofusible fibers of the first topsheet 11 can be suppressed from falling off.

In the bonding region RX, a bonding region RA can be provided. The following region RA has an adhesive for bonding the first surface sheet 11 and the second surface sheet 12 to each other. The sheet press section 18 according to the present embodiment extends in the front-rear direction L, and is arranged in the width direction W at intervals. In the configuration in which the first cover sheet 11 and the second cover sheet 12 are joined by an adhesive, it is difficult to apply heat or pressure to the first cover sheet 11 at the time of joining. Therefore, the breakage of the non-thermofusible fibers due to heat or the like at the time of joining can be suppressed, and the fibers of the first topsheet 11 can be suppressed from falling off. In addition, non-thermofusible fibers are difficult to be fused by pressing, and the bonding strength may be low. With the adhesive, it becomes easy to obtain the desired bonding strength.

In the bonding region RX, both the bonding region RA and the sheet press section 18 may be provided. The bonding strength of the first topsheet 11 and the second topsheet can be ensured by the bonding area RA, and the first topsheet 11 and the second topsheet can be joined in a certain range in the thickness direction by the sheet press section 18, Further, it is possible to suppress the shedding of non-thermofusible fibers. In addition, the junction region RX, the subsequent region RA and the sheet press section 18 may be provided at different intervals. Specifically, the pitch in the width direction of the continuation region RA is shorter than the pitch in the width direction of the sheet press section 18 , and may be half the pitch in the width direction of the sheet press section 18 . According to such a structure, the area|region with strong adhesion strength which both overlaps, and the area|region with low adhesion strength where only one side is arrange|positioned are provided. In the region where the adhesive strength is low, it is possible to maintain the bonding state of the non-thermofusible fibers in the region where the adhesive strength is high while securing the flexibility of the surface sheet.

In addition, the first surface sheet contains thermally fusible fibers together with non-thermally fusible fibers. Since the first surface sheet contains the thermally fusible fibers, a fused portion is formed between the fibers due to the fusing of the thermally fusible fibers, so that the non-thermally fusible fibers hardly fall off. Therefore, the fall-off of the heat-fusible fibers can be further prevented.

The second surface sheet 12 may contain thermally fusible fibers. Since the second surface sheet 12 contains thermally fusible fibers, a fusing portion is formed between the fibers by the fusing of the thermally fusible fibers, and the non-thermally fusible fibers of the first surface sheet 11 are caught in the fusing portion. becomes difficult to come off. Therefore, the non-thermofusible fibers can be further prevented from falling off.

As shown in Fig. 2, it is possible to install: the outer surface of the second surface sheet 12 The side edge 12E and the side sheet 13 are not joined to the side non-joint region RZ. The outer edge 12E of the second cover sheet 12 is located on the outer side in the width direction than the first cover sheet 11 , and stands up with respect to the side sheet 13 in the side non-bonding region RZ. Therefore, when pinched by the wearer's foot, the outer edge 12E of the second topsheet 12 tends to come into contact with the foot earlier than the outer edge 11E of the first topsheet 11 . Furthermore, it is possible to prevent the non-thermofusible fibers from falling off due to friction between the outer edge 11E of the first surface sheet 11 and the foot.

On the outer edge 12E of the second cover sheet 12, a fold FL extending in the front-rear direction L of the second cover sheet 12 can be formed. Since the second topsheet 12 is folded, when it comes into contact with the wearer's foot, it is easily deformed based on the crease FL. For example, in a configuration in which the folded second topsheets are not joined to each other, the folded second topsheets are deformed so as to be separated in the thickness direction, and are deformed inward in the width direction. By the deformation of the second topsheet 12, the contact feeling with respect to the first topsheet 11 can be alleviated, and the detachment of the non-thermofusible fibers of the first topsheet 11 can be suppressed.

The outer edge 11E of the first topsheet 11 may be located further inward in the width direction W than the outer edge 20E of the absorbent core 20 . When pinched by the wearer's foot, the outer edge 20E of the absorbent core 20 is more likely to come into contact with the foot than the outer edge 11E of the first topsheet 11 . Furthermore, it is possible to prevent the non-thermofusible fibers from falling off due to friction between the outer edge 11E of the first surface sheet 11 and the foot.

(3) Configuration of the absorbent article according to the second embodiment

Next, the absorbent article 1 according to the second embodiment will be described with reference to FIGS. 5 to 8 . The description of the same contents as those of the above-mentioned first embodiment will be omitted.

Fig. 5 is a plan view of the absorbent article 1 according to the second embodiment viewed from the skin-opposing surface side. Fig. 6 is a cross-sectional view taken along the line A-A shown in Fig. 5, and Fig. 7 is an enlarged view of the portion B shown in Fig. 6 . Fig. 8 is a plan view showing a bonding region and a sheet press portion located in the absorbent article according to the second embodiment.

The 1st surface sheet 11 may be formed so that the convex pleats may be formed on the skin-opposing surface side like FIG. 6. FIG. By forming the ridges, since the elongation in the width direction of the first surface sheet having a low elongation rate due to the amount of the convex shape can be increased, the cracking of the first surface sheet can be reduced.

A press section 60 can be formed on the first topsheet 11 and the second topsheet 12 . The press section 60 compresses at least the first topsheet 11 and the second topsheet 12 in the thickness direction. The press section 60 may compress the first topsheet 11, the second topsheet 12, and the absorbent core 20 in the thickness direction. In the press section 60 of the present embodiment, the first topsheet 11, the second topsheet 12, and the absorbent core 20 are compressed in the thickness direction. In addition, the absorbent article 1 may be provided with a sheet press part 18 which presses the first topsheet 11 and the second topsheet 12 in addition to the press part 60 .

Next, the structure which suppresses the crack of the surface sheet of the absorbent article 1 comprised in this way is demonstrated. The absorbent article 1 is configured to suppress the breakage of the topsheet (the first topsheet 11 in the present embodiment) having non-thermofusible fibers.

The first topsheet 11 and the second topsheet 12 are compressed in the thickness direction when the press section 60 is formed, and a force to stretch in the plane direction acts. At this time, the entire first cover sheet 11 is joined to the second cover sheet 12. Since the first cover sheet 11 has no degree of freedom to move in the plane direction, there is a possibility that the first cover sheet 11 may receive a force to be pulled in the plane direction. causing the risk of cracking. The free end portion 15 of the first topsheet 11 is easy to move with respect to the plane direction, and can move toward the press portion 60 side when compressed in the thickness direction when the press portion 60 is formed. Therefore, when the press section 60 is formed, the force applied to the drawing direction of the first topsheet 11 can be reduced, and the breakage of the first topsheet 11 having non-thermofusible fibers such as cotton fibers can be suppressed.

In particular, as in the present embodiment, the first topsheet 11, the second topsheet 12, and the press section 60 in which the absorbent core 20 is compressed are provided, and only the first topsheet 11 and the second topsheet 12 are provided. Compared with the compressed structure, the degree of compression is stronger, and the first surface sheet 11 is more easily cracked. Therefore, it is preferable to suppress the breakage of the first surface sheet 11 by the free end portion 15 .

Next, the free end portion 15 will be described in detail. FIG. 8 shows the bonding area RA between the first topsheet 11 and the second topsheet 12 , and the sheet press section 18 . Actually, the following area RA and the sheet press section 18 are overlapped in the thickness direction, but for convenience of description, they are shown in a state adjacent to each other in the front-rear direction. The following region RA is a region where the adhesive of the first surface sheet 11 and the second surface sheet 12 is applied. Next, the region RA may extend in the front-rear direction L, and a plurality of locations may be provided at intervals in the width direction. The length in the width direction of the subsequent region RA may be longer than the interval in the width direction of the subsequent region RA. In another form, the following area RA may extend in the width direction W, and a plurality of places may be provided at intervals in the front-rear direction L.

The sheet press section 18 may extend in the front-rear direction L, and is provided in a plurality of places at intervals in the width direction. The length in the width direction of the sheet press section 18 may be shorter than the interval in the width direction of the sheet press section 18 . In another form, the following area RA may extend in the width direction W, and a plurality of places may be provided at intervals in the front-rear direction L.

It is possible to provide a region where the sheet press section 18 and the subsequent region RA overlap in the thickness direction, and a region where they do not overlap in the thickness direction. A region where the sheet press section 18 and the bonding region RA do not overlap in the thickness direction constitutes a non-bonding region RY. The area where the sheet press section 18 and the bonding region RA overlap in the thickness direction, the region where only the sheet press section 18 is provided, and the region where only the bonding region RA is provided, constitute the bonding region RX.

Next to the region RA, it may be located closer to the inner side than the outer edge of the first surface sheet 11 . That is, the junction area RA may be located further inward in the width direction than the outer edge 11E in the width direction of the first cover sheet 11 , and may be located in the front and rear than the outer edge 11F in the front and rear direction L of the first cover sheet 11 . the inside of the direction. In addition, the bonding area RA located on the outermost side in the width direction may be located closer to the outer side in the width direction than the sheet press section 18 located on the outermost side in the width direction. With such a configuration, the free end portion 15 becomes a region between the outer edge 11E of the first topsheet 11 and the contact region RA located on the outermost side in the width direction. In addition, the bonding region RA located on the outermost side in the front-rear direction may be located on the outer side in the width direction rather than the sheet press section 18 located on the outermost side in the front-rear direction. With such a configuration, the free end portion 15 becomes a region between the outer edge 11F of the first topsheet 11 and the contact region RA located on the outermost side in the front-rear direction.

The free end portion 15 may include the outer edge 11E in the width direction of the first topsheet 11 and extend in the front-rear direction L. Generally, in the absorbent article 1, the length in the front-rear direction L is longer than the length in the width direction W. As shown in FIG. Therefore, by providing the free end portion 15 on the outer edge 11E of the first cover sheet 11, the area of the free end portion 15 can be easily secured, and the breakage of the first cover sheet 11 can be suppressed.

The free end portion 15 can overlap the absorbing core 20 in the thickness direction T. As shown in FIG. The press part 60 is formed in the absorption core piece 20, and since the free end part 15 is overlapped with the absorption core piece 20, the press part 60 and the free end part 15 are easy to arrange|position near by. By arranging the free end portion 15 for alleviating the force in the stretching direction in the vicinity of the press portion 60, the first topsheet 11 can be further suppressed from being split.

Next to the area RA, a plurality of locations may be provided at intervals. In the bonding region RA, the first surface sheet 11 and the second surface sheet 12 are bonded, and in the region between the bonding regions RA, the first surface sheet 11 and the second surface sheet 12 are not bonded. Therefore, when a tensile force is applied, there are parts that are easy to move (the region between the adjoining regions) and parts that are difficult to move (the adjoining region). When a tensile force is applied, the part that is easy to move moves with the part that is difficult to move as a base. By providing a plurality of places in this area, the force in the stretching direction can be relieved over a wide range of the first topsheet, and the breakage of the first topsheet 11 can be suppressed.

The press section 60 may be located more inward than the outer edge of the first surface sheet 11 . That is, the press section 60 may be located at the inner side in the width direction than the outer edge in the width direction of the first topsheet 11, and may be located closer to the front/rear direction than the outer edge of the first topsheet 11 in the front-rear direction L. inside. The press section 60 may include a first press section 61 and a second press section 62 .

The first press section 61 may be arranged at the free end section 15 . When the first press section 61 is formed at the free end, the first press section 61 is formed by compressing the region where the first topsheet 11 and the second topsheet 12 are not joined. Since the first topsheet 11 and the second topsheet 12 are not joined at least around the first press section 61, the force acting in the drawing direction of the first topsheet 11 can be alleviated. Therefore, the cracking of the first surface sheet can be further suppressed. Moreover, the 2nd press part 62 may be provided in the joining area|region RX in which the 1st top sheet and the 2nd top sheet are joined.

The 1st press part 61 can span over the free end part 15 and the area|region outside the 1st surface sheet 11. FIG. At least the side sheet 13 may be arranged outside the first surface sheet 11 . Compared with the configuration in which the entire area of the first press section 61 is formed on the first topsheet, the force acting in the stretching direction of the first topsheet can be alleviated when the first press section 61 is formed. Therefore, the cracking of the first surface sheet can be further suppressed.

The press section 60 may be recessed from the first topsheet 11 side toward the second topsheet 12 side. The force compressed by the press section 60 is applied from the side of the first topsheet 11 to the side of the second topsheet 12 . Since the free end portion 15 is provided on the sheet on the side where the force is applied (skin-opposing surface side), the force in the stretching direction is more relaxed, and the breakage of the first top sheet 11 can be suppressed.

The press section 60 can be arranged as a pair at a distance from each other in a plan view. The distance between the pair of press sections 60 may not be constant. That is, as shown in FIG. 5, a first region R11 in which a pair of press sections 60 is narrowly spaced apart from each other, and a second region R12 in which the space between a pair of press sections 60 is wider than the first region R11 may be provided. . In the portion where the press sections 60 are widely spaced from each other, since the length of the first surface sheet located in this section is long, the force in the stretching direction when the press section 60 is formed is weak. On the other hand, since the length of the first surface sheet 11 in the portion where the press sections 60 are narrowly spaced from each other is short, the force in the stretching direction during the formation of the press section 60 acts strongly. Since the part where the tensile force acts strongly and the part where the tensile force is weak coexist, the applied force is not concentrated compared with the case where the force is applied equally, and the cracking of the first surface sheet can be suppressed.

The elongation of the second topsheet 12 may be higher than the elongation of the first topsheet 11 . Since the elongation of the second cover sheet 12 is higher than that of the first cover sheet 11, a sheet having a relatively low elongation rate is used for the first cover sheet 11, and when the first cover sheet is joined, the surface can also be suppressed. The reduction in the elongation of the entire sheet can reduce the breakage of the first surface sheet.

In addition, the elongation can be measured using a tensile tester (automatic chart manufactured by Shimadzu Corporation). Specifically, a test piece in which the first surface sheet and the second surface sheet were cut into a size of 25 mm×40 mm was cut, and each material was not stretched, and the junction was kept at a low temperature and separated. After setting the distance between the measurement terminals of the tensile tester to 20 mm, the measurement was performed under the setting conditions of the tensile speed of 100 mm/min, and the value of the elongation at break was obtained. The measurement was performed three times, and the average value was taken as the elongation of each sheet.

As mentioned above, although this invention was demonstrated in detail using the above-mentioned embodiment, it is clear to those skilled in the art that the present invention is not limited to the embodiment described in this specification. The present invention can be implemented with modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, what is described in this specification is for the purpose of illustration and description, and does not have any meaning to limit the present invention.

[Industrial Availability]

It is possible to provide an absorbent article capable of suppressing the deterioration of the wearer's skin feeling while suppressing the detachment of the non-thermofusible fibers.

1: absorbent articles

3: Flanks

4: Hip flanks

10: Surface Flakes

11: The first surface sheet (surface sheet)

11E: Outside edge

11F: Outer edge

12: Second surface sheet (surface sheet)

12E: Outside edge

13: side flakes (surface flakes)

14: back sheet

15: Free end

18: Press section

20: Absorb Chip

20E: Outside edge

60: Press section

61: 1st press section

62: 2nd press section

L: Front and rear direction

R1: Anterior domain

R2: Posterior domain

R3: Central Domain

R11: Region 1

R12: Region 2

R33: Drain port contact part

RA: then area

RX: junction area

RY: non-junction area

RZ: Side Non-Joint Zone

T: thickness direction

T1: The side facing the skin

T2: Non-skin facing side

W: width direction

Fig. 1 is a plan view of the absorbent article of the first embodiment viewed from the skin-opposing surface side. Fig. 2 is a sectional view taken along the line A-A shown in Fig. 1. FIG. 3 is an enlarged view of part B shown in FIG. 2 . Fig. 4 is a plan view showing a bonding region and a sheet press portion of the absorbent article of the first embodiment. Fig. 5 is a plan view of the absorbent article of the second embodiment viewed from the skin-opposing surface side. FIG. 6 is a sectional view taken along the line A-A shown in FIG. 5 . FIG. 7 is an enlarged view of part B shown in FIG. 6 . Fig. 8 is a plan view showing a bonding region and a sheet press portion of the absorbent article of the second embodiment.

1‧‧‧Absorptive articles

3‧‧‧Flank

4‧‧‧Hip flanks

10‧‧‧Surface sheet

11‧‧‧First surface sheet (surface sheet)

11E‧‧‧Outer edge

12E‧‧‧Outer edge

13‧‧‧Side sheet (surface sheet)

20‧‧‧Absorptive chip

20E‧‧‧Outer edge

R1‧‧‧Front side domain

R2‧‧‧Rear side domain

R3‧‧‧Central Domain

R33‧‧‧Drain port contact part

Claims (9)

An absorbent article comprising: a front-rear direction, a width direction orthogonal to the front-rear direction, a surface sheet, and an absorbent core disposed on a non-skin-facing surface side of the surface sheet; the surface sheet includes: A first topsheet containing non-thermofusible fibers, and a second topsheet located on the non-skin-facing surface side of the first topsheet, wherein the outer edge in the width direction of the first topsheet is disposed on the skin-facing surface side of the second top sheet; and provided with: a joint region where the first top sheet and the second top sheet are joined; and on the outer edge of the first top sheet, provided with: 2. The free end portion where the top sheet is joined; the distance in the width direction between the joined region and the outer edge of the first top sheet is shorter than the fiber length of the non-thermofusible fibers. The absorbent article as described in claim 1, wherein a press section obtained by compressing the first topsheet and the second topsheet is provided in the joint region. The absorbent article according to claim 2, wherein, The said press part is arrange|positioned at intervals in the said front-back direction or the said width direction. The absorbent article according to any one of claims 1 to 3, wherein an adhesive for bonding the first surface sheet and the second surface sheet is provided in the bonding region. The absorbent article according to any one of claims 1 to 3, wherein the first surface sheet contains thermally fusible fibers. The absorbent article according to any one of claims 1 to 3, wherein the second surface sheet contains thermally fusible fibers. The absorbent article according to any one of claims 1 to 3, wherein a side sheet covering the outer edge of the absorbent article is arranged on the non-skin-facing surface side of the second top sheet The outer edge of the second cover sheet is located at the outer side in the width direction than the outer edge of the first cover sheet, and has: the outer edge of the second cover sheet is not joined with the side edge sheet side non-joint areas. The absorbent article according to claim 7, wherein the second topsheet is folded based on the creases along the front-rear direction, and the creases are provided on the second topsheet. above the outer edge. The absorbent article according to any one of Claims 1 to 3, wherein the outer edge of the first surface sheet is located inward in the width direction than the outer edge of the absorbent core.

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