CN111511331A

CN111511331A - Absorbent article

Info

Publication number: CN111511331A
Application number: CN201880082984.9A
Authority: CN
Inventors: 石川青; 黑田贤一郎; 野田祐树
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2017-12-27
Filing date: 2018-12-11
Publication date: 2020-08-07
Anticipated expiration: 2038-12-11
Also published as: KR20200103000A; CN111511331B; WO2019131107A1; JP7133921B2; TW201936150A; JP2019115581A

Abstract

An absorbent article (10) is provided with a front-back direction (L), a width direction (W) that is orthogonal to the front-back direction (L), a main body that includes a front sheet (20) that faces the skin of a wearer, a back sheet (22) that faces the side opposite to the skin of the wearer, and an absorbent body (30) that is between the front sheet (20) and the back sheet (22), and a belt member (60) for aftertreatment that is fixed to the main body, wherein the bending stiffness of the belt member (60) is lower than the bending stiffness of the portion where the front sheet (20), the back sheet (22), and the absorbent body (30) overlap.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article provided with a belt for post-treatment.

Background

An absorbent article such as a sanitary napkin, a panty liner, an adult incontinence pad, or a feces pad is attached to the inside of a wearing article to be worn by a wearer during use. In general, an absorbent article attached to the inside of a wearing article has an adhesive portion for preventing the absorbent article from shifting with respect to the wearing article. The adhesive portion is provided on the surface of the absorbent article opposite to the skin surface side (the side facing the skin of the wearer).

Patent document 1 discloses an absorbent article such as a disposable diaper and a sanitary napkin provided with a fastening tape for post-treatment. The fastening tape includes a base portion fixed to the backsheet and an extensible portion provided continuously to the base portion. The fixing tape has two bent portions that divide the fixing tape substantially by 3 in the longitudinal direction of the fixing tape. The fastening tape is folded by 3-fold by the folding portion. The extension portion is bonded to the base portion by a weak bonding surface so as to be peelable from the base portion. The bonded portion of the extension portion can be bonded to the back sheet of the absorbent article at the time of disposal by a strong adhesive surface.

Documents of the prior art

Patent document

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

Disclosure of Invention

The present inventors have conducted intensive studies and, as a result, have found the following problems with respect to a belt member for post-treatment. That is, conventionally, it has not been assumed that the belt member for post-treatment gives a wearer a sense of discomfort in wearing. However, it has been found that, during wearing of the absorbent article, the end portion of the sheet near the belt member for post-treatment is turned over, and thus a part of the belt member may come into direct contact with the skin of the wearer.

In addition, in an absorbent article attached to clothing of a wearer, such as a sanitary napkin, a panty liner, an adult incontinence pad, or a feces pad, since the absorbent article is pressed against the skin of the wearer by the clothing, a feeling of discomfort due to the belt member is generated.

In particular, in an absorbent article attached to underwear such as underpants, the absorbent article is smoothly curved in accordance with the round shape of the buttocks. If the belt member having relatively high rigidity is disposed in the region thus bent, the wearer may feel more uncomfortable.

Therefore, an absorbent article including a belt member capable of suppressing a sense of incongruity is desired.

An absorbent article according to one aspect includes: a front-back direction; a width direction orthogonal to the front-rear direction; a main body section including a front surface sheet facing the skin of a wearer, a back surface sheet facing the side opposite to the skin of the wearer, and an absorber between the front surface sheet and the back surface sheet; and a belt member for post-treatment fixed to the main body, the belt member having a bending rigidity lower than that of a portion where the front sheet, the back sheet, and the absorber are superposed.

Drawings

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

Fig. 2 is a plan view of the absorbent article of embodiment 1, viewed from the non-skin surface side.

Fig. 3 is a perspective view of the absorbent article in a state rolled up in the front-rear direction.

Fig. 4 is a plan view of the absorbent article according to embodiment 2, viewed from the non-skin surface side.

Detailed Description

(1) Brief description of the embodiments

At least the following matters will be apparent from the description of the present specification and the accompanying drawings.

In some cases, the end portion of the sheet near the belt member for post-treatment is turned over during wearing of the absorbent article, and thus a part of the belt member is directly in contact with the skin of the wearer. Here, since the bending rigidity of the belt member is lower than the bending rigidity of the portion where the front sheet, the back sheet, and the absorber are overlapped, the wearer does not easily feel a sense of discomfort with respect to the belt member as compared with the portion where the front sheet, the back sheet, and the absorber are overlapped.

According to a preferable aspect, the bending rigidity of the belt member is lower than the bending rigidity of the absorber.

This can further suppress the discomfort of the belt member to the wearer.

According to a preferred embodiment, the belt member is provided on the non-skin surface side of the back sheet, and the belt member has a bending rigidity lower than that of the back sheet.

In particular, the bending rigidity of the belt member provided on the non-skin surface side of the back sheet is lower than the bending rigidity of the back sheet, and therefore, even if the absorbent article rubs against the skin due to the movement during wearing, the wearer cannot easily perceive the tactile sensation of the presence of the belt member. Therefore, the uncomfortable feeling to the wearer can be further suppressed.

According to a preferred aspect, the belt member has: a fixing portion fixed to the main body portion; and a non-fixed portion that is not fixed to the main body portion and has no adhesive material.

As a result, the end portion of the sheet near the belt member for post-treatment may be curled up during wearing of the absorbent article, and a part of the belt member may be in direct contact with the skin of the wearer. Even in this case, since the adhesive material is not provided in the non-fixing portion of the belt member, the belt member can be prevented from adhering to the skin of the wearer. Further, since no adhesive material is provided in the non-fixing portion of the tape member, it is possible to prevent a problem that the tape member sticks to the adhesive material of the tape member itself during wearing.

According to a preferred aspect, at least the non-fixing portion of the band member is configured to be stretchable in the extending direction.

At least the non-fixing portion of the belt member is configured to be extensible in the extending direction, so that the absorbent article can be easily fixed by the belt member when the rolled absorbent article is fixed by the belt member.

When the non-fixed portion of the tape member is elongated in the extending direction, the non-fixed portion of the tape member is narrowed in a direction orthogonal to the extending direction. Here, in the case where the non-fixing portion includes the adhesive material, the non-fixing portion of the tape member is likely to warp in the width direction due to a difference between the stretchability of the adhesive material and the stretchability of the tape member. If the non-fixed portion of the tape member is warped, the tape member itself may be stuck to the adhesive material of the tape member. Therefore, when at least the non-fixed portion of the tape member is configured to be extensible, the non-fixed portion preferably does not have an adhesive material.

According to a preferred solution, the strap member is constituted by a single sheet that is unfolded.

This can further suppress the discomfort given to the wearer, as compared with a belt member folded in multiple layers.

According to a preferred embodiment, the belt member is formed of a film containing no antistatic agent.

Thus, the tape member is easily attached to the main body by static electricity. The belt member is attached to the main body portion, so that the belt member can be inhibited from being rolled up during wearing of the absorbent article.

According to a preferred embodiment, the absorbent article has an adhesive portion provided on the non-skin surface side of the back sheet.

An absorbent article such as a sanitary napkin, a panty liner, an adult incontinence pad, or a feces pad can be fixed to clothing such as underwear of a wearer by the adhesive section provided on the non-skin surface side of the back sheet. Even in this case, since the rigidity of the belt member is low, the wearer's uncomfortable feeling due to the belt member can be suppressed.

Further, when the absorbent article is rolled up after the absorbent article is used, the belt member can be fixed to the adhesive portion. Therefore, the adhesive portion can be used for both the purpose of fixing to clothes and the purpose of fixing the belt member for post-treatment.

According to a preferred embodiment, the absorbent article is configured to be fixed to underwear of a wearer in use, and the belt member is provided at a central portion in the width direction of the absorbent article within a range of a length 1/3 that is equal to a length of the absorbent article in the front-rear direction from a rear side edge of the absorbent article.

Thus, the belt member is disposed at a position corresponding to a cleft (cleft buttocks) of the wearer's buttocks. Since the belt member is disposed in the depressed portion of the skin of the wearer in this manner, the wearer's uncomfortable feeling due to the belt member can be reduced.

According to a preferred embodiment, the belt member is provided within a range of a length of 15% of the length of the absorbent article in the front-rear direction from the rear side edge of the absorbent article.

(2) Structure of absorbent article

Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary napkin, panty liner, breast pad, adult incontinence pad, fecal pad or sweat pad. In particular, the absorbent article may be 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. In the drawings, the drawings are schematic, and it should be noted that the scale of each dimension and the like may be different from the actual scale and the like. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and ratios from each other.

Fig. 1 is a plan view of the absorbent article of embodiment 1 as viewed from the skin surface side. Fig. 2 is a plan view of the absorbent article of embodiment 1, viewed from the non-skin surface side. 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 the skin side of the wearer during use.

The absorbent article 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 from the back side to the front side of the wearer the width direction W is a direction orthogonal to the front-back direction L.

The absorbent article 10 has a main body portion including a front surface sheet 20 facing the skin of a wearer, a back surface sheet 22 facing the side opposite to the skin of the wearer, and an absorbent body 30 between the front surface sheet 20 and the back surface sheet 22, the front surface sheet 20 facing the skin of the wearer during use, the back surface sheet 22 facing the side opposite to the skin of the wearer during use, and the absorbent body 30 extending in the front-back direction L of the absorbent article.

The absorbent article 10 may also have wings 40 and hip flaps 50. The flap 40 is folded back toward the non-skin surface side of the crotch portion of the worn article when in use. The hip flap 50 is a portion that bulges in the width direction W at a position rearward of the flap 40. The hip flaps 50 are portions bulging outward in the width direction W from the outer edge of the absorbent body 30.

The absorbent article 10 has an excretory opening opposing region S1 which opposes the wearer' S excretory opening (e.g., vaginal opening) during use. The excretory opening facing region S1 is a region disposed in the crotch of the wearer, i.e., between the legs of the wearer, and corresponds to a region where the absorbent body 30 is present. In the absorbent article 10 having the flaps 40, the excretory opening opposing region S1 is located between the flaps 40, and corresponds to the region where the absorbent body 30 is present.

As shown in fig. 2, the absorbent article 10 has

adhesive sections

42, 52, 70 provided on the non-skin surface side of the back sheet 22. The

adhesive sections

42, 52, 70 are regions provided with an adhesive for fixing the absorbent article 10 to a wearing article. The adhesive includes a body adhesive 70, a flap adhesive 42, and a flap adhesive 52.

The absorbent article can be fixed to clothing such as underwear of the wearer by the

adhesive sections

42, 52, 70 provided on the non-skin surface side of the back sheet 22. When the absorbent article 10 is rolled up after use, the belt member 60 for post-treatment can be fixed to the

adhesive sections

42, 52, and 70. Therefore, the

adhesive portions

42, 52, and 70 can be used for both the purpose of fixing to the clothes and the purpose of fixing the belt member for the post-treatment.

The main body bonding part 70 is provided in a region overlapping the absorbent body 30 in the thickness direction of the absorbent article, preferably, the main body bonding part 70 extends continuously or intermittently from at least the excretory opening facing region S1 toward the rear of the absorbent article 10, and a plurality of main body bonding parts 70 may be provided at intervals in the width direction W extending in the front-rear direction L.

The flap adhesive portion 42 is provided to the flap 40. The flaps 40 are folded back toward the wearing article of the wearer during use, and attached to the non-skin surface side of the wearing article by the flap adhesive sections 42. The flap adhesive 52 is provided to the hip flap 50.

The absorbent article 10 may also have at least two fold lines extending in the width direction W. In the example shown in fig. 1 and 2, the absorbent article 10 has 3 folding lines F1 to F3. These folding lines F1 to F3 are lines for folding the absorbent article when the absorbent article is packaged.

The absorbent article 10 further includes a belt member 60 disposed on the non-skin surface side of the back sheet 22 at a position inward of the outer edge of the absorbent article 10. Therefore, the belt member 60 is hidden in the absorbent article 10 when viewed from the skin surface side.

The belt member 60 is configured to be extensible so as to extend outward beyond the outer edge of the absorbent article 10. Herein, "elongation" includes elongation caused by "elastic deformation" or "plastic deformation". In the present specification, the band member 60 is preferably configured to be plastically deformable. For example, the belt member 60 may be formed of a stretchable sheet. In this case, the wearer pulls the belt member 60, and the belt member 60 extends outward beyond the outer edge of the absorbent article 10.

The belt member 60 is a belt for post-treatment, and may be extended to such an extent that it can be attached to the main body bonding portion 70 in a state where the absorbent article 10 is rolled up. The tape member 60 may be made of any material as long as it can be attached to the main body adhesive part 70. Preferably, the tape member 60 is made of a material that is easily adhered to the main body adhesive part 70 compared to the surface sheet 20.

The belt member 60 has a fixing portion 62 fixed to the main body portion of the absorbent article 10, particularly, the non-skin surface of the absorbent article 10. That is, the fixing portion 62 of the tape member 60 is fixed to the back surface sheet 22. The tape member 60 has a non-fixed portion 64 that is not fixed to the main body portion, particularly the back surface sheet 22. The surface of the non-fixing portion 64 of the band member 60 may not have an adhesive material.

The belt member 60 may be configured to be fixed to the main body portion that is rolled up so that the skin-facing surface side of the absorbent article is positioned inside when the absorbent article 10 is discarded, thereby maintaining the rolled-up state of the absorbent article 10. The non-fixing portion 64 of the belt member 60 is configured to be fixable to the main body portion. The non-fixing portion 64 may be fixed to the main body portion by an adhesive portion of the main body portion 20, or may be a fixing means such as an adhesive agent or a hook member provided on the tape member 60. The fixing portion 62 of the belt member 60 may be configured to be fixable to the main body portion. The fixing portion 62 may be a bonding portion of the main body, or may be a fixing means such as an adhesive or a hook member provided on the tape member 60.

First embodiment of the absorbent articleFor example. The surface sheet may consist of a weight per unit area of 30g/m²The hot air non-woven fabric (PE/PET). A second sheet may be provided between the topsheet and the absorbent core. The second sheet may be made of the same material as the surface sheet. The side sheet may be disposed outside the body in the width direction without disposing the front sheet. The side sheet may have a weight per unit area of 13g/m²The SMS nonwoven fabric (PP) of (1). The absorbent material of the absorbent core may be composed of softwood kraft pulp and a superabsorbent polymer. The proportion of the weight of the superabsorbent polymer relative to the weight of the absorbent material as a whole may be 10%. The weight per unit area of the absorbent core in the region including the excretory opening opposing region S1 may be configured to be higher than the weight per unit area of the surrounding absorbent core. The absorbent core of the region comprising the excretory opening opposing region S1 may have a weight per unit area of 950g/m²The weight per unit area of the surrounding absorbent core may be 300g/m². The back sheet may have a basis weight of 23.5g/m²Is made of a polyethylene film (non-breathable type). The absorbent article may be formed with a compressed portion obtained by compressing the topsheet and the absorbent core in the thickness direction. The main body bonding part may be made of a rubber-based hot-melt adhesive. The weight per unit area of the main body bonding part may be 27g/m². The body bonding portion may be provided with 6 strips at intervals in the width direction. The length of each body bonding portion in the width direction may be 5mm, and the length of each body bonding portion in the front-rear direction may be 320 mm. The length of the absorbent article in the front-rear direction may be 420mm, and the length of the absorbent article in the width direction may be 200 mm. The belt member for post-treatment may be composed of a weight per unit area of 35g/m²The polyethylene film of (1). The length of the belt member in the longitudinal direction may be 45mm, and the length of the belt member in the short direction may be 25 mm. The belt member can use a weight per unit area of 100g/m²The rubber-based hot-melt adhesive is fixed to the main body. The adhesive may be applied in a range of 21mm in width and 5mm in length. The back sheet side of the tape member may be printed. For printing, a pink urethane ink can be used. Further, the extensible belt member may be constituted by a weight per unit area of 10g/m²Polypropylene layer of (2), weight per unit area 10g/m²Styrene-based rubber layer and a weight per unit area of 10g/m²Is laminated with the polypropylene layer of (a).

At least the non-fixing portion 64 of the belt member 60 is configured to be extensible in the extending direction. At least the non-fixing portion 64 of the belt member 60 is configured to be stretchable in the extending direction, so that when the rolled absorbent article 10 is fixed by the belt member 60, the absorbent article 10 can be easily fixed by the belt member 60 (see fig. 4).

The strap member 60 may be constructed of a single sheet that is unfolded. This makes it possible to further suppress discomfort (a decrease in the tactile sensation) to the wearer when the absorbent article is worn, as compared with a belt member folded in multiple layers.

When the absorbent article 10 is worn, the end portion of the sheet near the belt member 60 for post-treatment is turned over, and thus a part of the belt member 60 may directly contact the skin of the wearer. Even in this case, since no adhesive material is provided on the non-fixing portion 64 of the belt member 60, the belt member 60 can be prevented from adhering to the skin of the wearer.

Further, since no adhesive material is provided in the non-fixing portion 64 of the tape member 60, it is possible to prevent such a problem that the tape member sticks to the adhesive material of the tape member itself during wearing.

Specifically, when the non-fixing portion 64 of the belt member 60 is elongated in the extending direction, the non-fixing portion 64 of the belt member 60 is narrowed in a direction orthogonal to the extending direction. Here, in the case where the non-fixing portion 64 includes the adhesive material, the non-fixing portion 64 of the tape member 60 is easily warped in the width direction due to a difference between the stretchability of the adhesive material and the stretchability of the tape member 60. If the non-fixing portion 64 of the tape member 60 warps, the tape member itself may stick to the adhesive material of the tape member 60. When the surface of the non-fixing portion 64 of the tape member 60 does not have an adhesive material, the tape member 60 itself can be prevented from sticking to the adhesive material of the tape member 60.

The tip end portion of the belt member 60 in the extending direction may face the opposite side to the fixing portion 62. In this case, when the belt member 60 is extended outward from the outer edge of the absorbent article 10, a force acts only in the extending direction on the fixing portion 62 of the belt member 60. This makes it possible to reduce the force applied to the fixing portion 62 as much as possible, and thus to maintain the fixing strength of the belt member 60.

After the absorbent article 10 is used, the user rolls up the absorbent article 10 in the front-rear direction L, and then can extend the belt member 60 to a position outside the outer edge of the absorbent article 10 (see fig. 4). since the belt member 60 is disposed on the non-skin surface side of the back sheet 22 at a position inside the outer edge of the absorbent article 10 during use, bodily fluids such as menstrual blood do not adhere to the belt member 60. since the user mounts the belt member 60 extending outward after using the absorbent article 10 to the adhesive section 70 provided at the other portion of the back sheet 22, the rolled-up state of the absorbent article 10 can be maintained.

Further, since the belt member 60 is provided on the non-skin surface side of the back sheet 22 and does not extend outward beyond the outer edge of the absorbent article 10 during use of the absorbent article 10, the belt member 60 does not directly contact the skin of the wearer. Therefore, the uncomfortable feeling and the unpleasant feeling during the use can be reduced.

Preferably, the belt member 60 is provided in the central portion in the width direction W of the absorbent article 10 within a range of 1/3, which is the length in the front-rear direction L of the absorbent article 10 from the rear side edge E2 of the absorbent article 10, whereby the belt member 60 is disposed at a position corresponding to a slit (cleft buttocks) of the buttocks of the wearer, and thus the belt member 60 is disposed in a recessed portion of the skin of the wearer, so that the wearer's uncomfortable feeling due to the belt member 60 can be reduced.

More preferably, the belt member 60 is provided within a range of 15% of the length in the front-rear direction L of the absorbent article 10 from the rear side edge E2 of the absorbent article 10, whereby the belt member 60 is disposed at a position corresponding to a slit (cleft buttocks) of the buttocks of the wearer, and the belt member 60 is disposed at a recessed portion of the skin of the wearer in this manner, so that the uncomfortable feeling of wearing due to the belt member 60 can be reduced.

Preferably, the belt member 60 is configured to be able to extend rearward relative to the rear side edge of the absorbent article 10. More preferably, the belt member 60 is provided at a position rearward of the most rearward folding line F3 among the folding lines F1 to F3. A user who turns around 8 turns the used absorbent article 10 from the front side. By configuring the tape member 60 to be extendable rearward of the rear side edge of the absorbent article 10, many users can extend the tape member 60 in the winding direction and attach the tape member 60 to the main body adhesive section 70.

More preferably, the main body bonding portion 70 is provided on an imaginary line extending the belt member 60 in the front-rear direction L. accordingly, when the belt member 60 is extended rearward of the rear side edge E2 of the absorbent article and the belt member 60 is made to straightly follow the rolled-up absorbent article 10, the main body bonding portion 70 is attached to the belt member 60. therefore, the user can easily maintain the rolled-up absorbent article 10 without pulling the belt member 60 obliquely toward the position of the main body bonding portion 70.

Preferably, the width of the body bonding portion 70 provided on the imaginary line in the direction orthogonal to the extending direction is larger than the width of the belt member 60 in the direction orthogonal to the extending direction. Thus, when the belt member 60 is extended in the extending direction in a state where the absorbent article 10 is rolled up, even if the belt member 60 is pulled out not straight but slightly bent, the non-fixing portion 64 of the belt member 60 is positioned at the position of the body bonding portion 70. Therefore, the user can easily attach the tape member to the adhesive portion.

The body bonding portion 70 may be provided in plurality at intervals in the width direction W. In this case, it is preferable that the width W1 of the belt member 60 in the width direction W is larger than the interval W2 between the main body bonding parts 70 in the width direction W. This prevents the main body adhesive part 70 from being absent at a position forward of the user pulling out the band member 60. Thus, the user can easily attach the belt member 60 to the adhesive portion 70.

Preferably, the surface of the belt member 60 that abuts the main body adhesion portion 70 is smooth. For example, the surface roughness of KES on the surface of the belt member 60 in contact with the main body bonding portion 70 may be in a range of about 0.5 to 1.5. Since the surface of the belt member 60 that abuts against the main body adhesion portion 70 is smooth, the contact area of the belt member 60 with respect to the main body adhesion portion 70 can be increased. Thus, when the belt member 60 is bonded to the main body bonding portion 70 in a state in which the absorbent article 10 is rolled up, the belt member 60 can be prevented from coming off the main body bonding portion 70.

The surface roughness of KES can be measured using, for example, A surface test apparatus (KES-FB4-AUTO-A) manufactured by Kato Tekko co, L TD, specifically, A tape member (test piece) to be measured is first placed on A measurement table of the surface test apparatus, and then A measurement terminal of the surface test apparatus is brought into contact with the test piece and moved in A measurement direction in A state where the test piece is fixed so that no wrinkle occurs in the test piece, and the test piece may be cut into A size having A length in the measurement direction of 100mm and A width in A direction perpendicular to the measurement direction of 50 mm.

Both the back sheet 22 and the belt member 60 may be composed of a film, for example, a synthetic resin film. Preferably, at least one of the surface of the belt member 60 that contacts the back sheet 22 and the surface of the back sheet 22 that contacts the belt member 60, and preferably both surfaces are not subjected to antistatic treatment.

In addition, the belt member 60 may be formed of a film containing no antistatic agent. This makes it easy for the tape member 60 to be attached to the main body by static electricity. The belt member 60 is attached to the main body portion, and thus, the belt member 60 can be prevented from being rolled up during wearing of the absorbent article 10.

Preferably, at least a part of the fixing portion 62 of the belt member 60 overlaps the absorber 30 in the thickness direction. The region where the absorber 30 is present becomes a region having particularly high rigidity in the absorbent article 10. Since the fixing portion 62 of the belt member 60 overlaps the absorbent body 30 in the thickness direction, the fixing portion 62 of the belt member 60 located in the region of high rigidity is reliably bent together with the absorbent article 10 when the absorbent article 10 is rolled up. In this manner, the fixing portion 62 of the tape member 60 is reliably bent, and the free end of the tape member 60 is more likely to float from the back surface sheet 22. This makes it easier for the user to pinch the belt member 60 and operate it.

The bending rigidity of the belt member 60 is lower than the bending rigidity of the portion where the front sheet 20, the back sheet 22, and the absorbent body 30 are overlapped. Here, during wearing of the absorbent article, the end portion of the sheet near the belt member for post-treatment is turned over, and thus a part of the belt member 60 may be in direct contact with the skin of the wearer. Here, the bending stiffness of the belt member 60 is lower than the bending stiffness of the portion where the front sheet 20, the back sheet 22, and the absorber 30 are overlapped, and therefore the wearer does not feel a sense of discomfort more easily than the portion where the front sheet 20, the back sheet 22, and the absorber 30 are overlapped.

Preferably, the bending rigidity of the belt member 60 is lower than that of the absorber 30. This can further suppress the discomfort of the belt member 60 to the wearer. The bending stiffness of the belt member 60 may be preferably 10-to-1, and more preferably 30-to-1 of the bending stiffness of the absorber 30.

More preferably, the belt member 60 is provided on the non-skin surface side of the back sheet 22, and the bending rigidity of the belt member 60 is lower than the bending rigidity of the back sheet 22.

In particular, the bending rigidity of the belt member 60 provided on the non-skin surface side of the back sheet 22 is lower than the bending rigidity of the back sheet 22, and therefore, even if the absorbent article 10 rubs against the skin due to the movement during wearing, the wearer is less likely to perceive the tactile sensation of the presence of the belt member 60. Therefore, the uncomfortable feeling to the wearer can be further suppressed.

That is, since the belt member 60 is covered with the back sheet 22 having a higher rigidity, the wearer hardly feels the rigidity of the belt member 60 during wearing.

The inventors of the present application measured the stiffness of a belt member for post-processing of various absorbent articles distributed in the market, but did not find an absorbent article in which the bending stiffness of the belt member 60 is lower than the stiffness of the back sheet 22, the stiffness of the absorbent body 30, and the stiffness of the portion where the front sheet 20, the back sheet 22, and the absorbent body 30 are overlapped.

The rigidity of the belt member 60, the rigidity of the back sheet 22, the rigidity of the absorbent body 30, and the rigidity of the portion where the top sheet 20, the back sheet 22, and the absorbent body 30 are superposed on each other are measured by the taber method defined in JIS P-8125.

For example, first, a test piece having a width of 38.1mm and a length of 70mm is collected from a member (sheet) to be measured. Next, a thickness meter (e.g., 44 mm. phi.3 g/m manufactured by PEACOCK)²) The test piece was placed between rollers of the taber stiffness tester, and the specimen was clamped so that the clamp gap matched the thickness of the test piece, and the upper end of the test piece was matched to the upper surface of the clamp, the gap between the rollers and the test piece was adjusted to about 0.5mm so that the rollers did not press the test piece, the test piece bending device of the taber stiffness tester was rotated, the rotation of the bending device was stopped at a point where a 15-degree scale line of the test piece bending device coincides with a pointer of the load pendulum, the load scale indicated by the pointer at this time was read, the load pendulum was immediately rotated in the opposite direction, the load scale was similarly read, and the average value of the load scales in both left and right directions was obtained, and an auxiliary weight was arbitrarily selected so that the load scale was in the range of 15% to 85% of the maximum scale, and thereafter, the stiffness (g · cm) of the test piece was calculated by a hard weight whose value was "× 10-10 × weight where the stiffness (g · cm) — the average value of the load scale was the maximum scale).

The width of the fixing portion 62 in the direction orthogonal to the extending direction is preferably shorter than the width W1 of the belt member 60 in the direction orthogonal to the extending direction. Thus, when the non-fixing portion 64 of the belt member 60 is pulled, a strong force is applied in the extension direction in the range of the width of the fixing portion 62 shorter than the entire width of the belt member 60. Therefore, the tensile force required to elongate the non-fixed portion 64 of the belt member 60 can be reduced.

The width of the fixing portion 62 in the direction orthogonal to the extending direction is more preferably half or more of the width W1 of the belt member 60 in the direction orthogonal to the extending direction. By increasing the width of the fixing portion 62 in the direction orthogonal to the extending direction, the unfixed portion 64 of the tape member 60 can be suppressed from being rolled up in the width direction W. This makes it easy to maintain the flat spread state of the non-fixing portion 64 of the belt member 60, and to fix the absorbent article 10 in a rolled state by the belt member 60.

The non-fixing portion 64 of the belt member 60 may be provided at a position separated from the absorbent body 30. For example, the non-fixing portion 64 of the belt member 60 is preferably provided at a position separated from the absorbent body 30 by 50mm or more. When liquid such as body fluid of a wearer is absorbed by the absorbent body 30, the back sheet 22 overlapping the absorbent body 30 in the thickness direction is twisted, and wrinkles are generated in the back sheet 22. If the belt member 60 is present at a portion where such wrinkles occur, a space is locally generated between the belt member 60 and the back sheet 22 due to the occurrence of wrinkles. As a result, the belt member 60 cannot be in close contact with the back sheet 22, and the belt member 60 is likely to move frictionally with respect to the back sheet 22 during wearing of the absorbent article 10. As a result, the belt member 60 is rolled or bent in the width direction, and it becomes difficult to use the belt member 60. In the present embodiment, the non-fixing portion 64 of the belt member 60 is provided at a position spaced apart from the absorbent body 30 in the thickness direction, that is, at a position where wrinkles are less likely to occur in the back sheet 22 even if the absorbent body 30 absorbs liquid. Thus, the belt member 60 can be inhibited from being rolled up or bent in the width direction during wearing.

The absorbent body 30 may be formed with embossments (compressed portions) in a predetermined pattern. The absorbent body 30 may have a low basis weight region having a lower basis weight than the surrounding absorbent body 30. In this case, the belt member 60 preferably overlaps the emboss formed on the absorbent body 30 or the low basis weight region provided on the absorbent body 30 in the thickness direction. If the belt member 60 overlaps in the thickness direction with embossments formed on the absorbent body 30 or a low basis weight region provided on the absorbent body 30, a gap is likely to be formed between the belt member 60 and the back sheet 22 (absorbent body 30). Therefore, the belt member 60 is more likely to float from the back sheet 22 when the absorbent article 10 is rolled up, and the user can more easily pinch the belt member 60 to operate it.

At least the region of the tape member 60 other than the fixing portion 62 is preferably provided at a position not overlapping with the flap adhesive portion 42, the flap adhesive portion 52, and the body adhesive portion 70. Thus, the belt member 60 is easily lifted from the back sheet 22 when the absorbent article 10 is rolled up. Thus, the user can more easily pinch the belt member 60 to operate.

The flap adhesive portion 42, the flap adhesive portion 52, and the body adhesive portion 70 are provided at positions that are located further to the outside than the inside of the movable range (region S in fig. 2) of the non-fixed portion 64 that does not involve the extension of the non-fixed portion 64 in the expanded state of the absorbent article 10. That is, the band member 60 does not adhere to the flap adhesive portion 42, the flap adhesive portion 52, or the body adhesive portion 70 in an unstretched state. This can prevent the tape member 60 from adhering to the flap adhesive portion 42, the flap adhesive portion 52, and the body adhesive portion 70 during wearing of the absorbent article 10.

In addition, embossing may be formed along the outer edges of the absorbent article 10. The embossing may be performed, for example, on the top sheet 20 and back sheet 22. In this case, a part of the embossing may also be formed on the belt member 60.

While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented by modifying or changing the 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 the present invention is not limited thereto.

The entire contents of japanese patent application No. 2017-252488 filed on 12/27/2017 are incorporated herein by reference.

Industrial applicability

An absorbent article having a belt member that can suppress a feeling of discomfort can be provided.

Description of the reference numerals

10. Absorbent article 20, topsheet 22, backsheet 30, absorbent body 40, flap 42, flap adhesive part 50, hip flap 52, flap adhesive part 60, tape member 62, fastening part 64, non-fastening part 70, body adhesive part S1, excretory opening facing region L, front-back direction, W, width direction.

Claims

1. An absorbent article in which, in the case of a disposable absorbent article,

the absorbent article has:

a front-back direction;

a width direction orthogonal to the front-rear direction;

a main body section including a front surface sheet facing the skin of a wearer, a back surface sheet facing the side opposite to the skin of the wearer, and an absorber between the front surface sheet and the back surface sheet; and

a belt member for post-treatment fixed to the main body,

the belt member has a bending rigidity lower than that of a portion where the front sheet, the back sheet, and the absorber are overlapped.

2. The absorbent article of claim 1,

the belt member has a bending rigidity lower than that of the absorber.

3. The absorbent article according to claim 1 or 2, wherein,

the belt member is provided on the non-skin surface side of the back sheet,

the belt member has a lower bending stiffness than the back sheet.

4. The absorbent article according to any one of claims 1 to 3, wherein,

the belt member has:

a fixing portion fixed to the main body portion; and

and a non-fixed portion that is not fixed to the main body portion and does not have an adhesive material.

5. The absorbent article according to claim 4,

at least the non-fixing portion of the band member is configured to be extensible in an extending direction.

6. The absorbent article according to any one of claims 1 to 5, wherein,

the strap member is constructed of a single sheet that is unfolded.

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

the belt member is composed of a film containing no antistatic agent.

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

the absorbent article has an adhesive section provided on the non-skin surface side of the back sheet.

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

the absorbent article is configured to be secured to the undergarment of the wearer during use,

the belt member is provided at a central portion in the width direction of the absorbent article within a range of a length 1/3 of a length in the front-rear direction of the absorbent article from a rear side edge of the absorbent article.

10. The absorbent article of claim 9,

the belt member is provided within a range of 15% of the length of the absorbent article in the front-rear direction from the rear side edge of the absorbent article.