CN110368192B

CN110368192B - Absorbent article

Info

Publication number: CN110368192B
Application number: CN201910292551.2A
Authority: CN
Inventors: 曽我部瑶介; 黒田贤一郎; 野田祐树; 石川青
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-04-12
Filing date: 2019-04-12
Publication date: 2022-10-14
Anticipated expiration: 2039-04-12
Also published as: JP7122146B2; JP2019180951A; CN110368192A

Abstract

The invention provides an absorbent article. The absorbent article can repeatedly fix the belt member for post-treatment, and can be cleanly discarded by the belt member at the time of disposal. An absorbent article (100) has a main body (20), an adhesive section (70) for joining the absorbent article to a wearing article, and a belt member (60) for post-treatment. The belt member has: a fixing region (61) fixed to the main body; and a non-fixed region (60) which is not fixed to the body and is capable of extending in the extending direction. The non-anchor region of the strap member has a 1 st layer (65) and a 2 nd layer (66) overlapping the 1 st layer. At least the 2 nd layer of the non-fixed region is configured to be capable of being fixed to the adhesive section after use of the absorbent article. The area ratio of the 2 nd layer to the 1 st layer in the elongated state of the belt member being elongated is lower than the area ratio of the 2 nd layer to the 1 st layer in the natural state where the non-fixed region is not elongated.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article such as a sanitary napkin.

Background

Patent document 1 discloses an absorbent article provided with a cover sheet for post-treatment. The cover sheet of patent document 1 is fixed to the back surface of the absorbent article. An adhesive part is provided on the back surface of the cover sheet or the absorbent article. The cover sheet is rolled up in a state where the absorbent article is rolled up, and the cover sheet is bonded to the back surface of the absorbent article via the bonding section, whereby the absorbent article can be discarded in a rolled-up state after use.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2010-220747

Disclosure of Invention

In the absorbent article of patent document 1, the cover sheet is bonded to the back surface of the absorbent article at the time of disposal, and the absorbent article is maintained in a rolled state. However, depending on the user, the absorbent article may not be properly rolled up or the cover sheet may not be bonded in place, which may cause failure in bonding the cover sheet. In such a case, the back surface of the absorbent article cannot be peeled off from the cover sheet, and the cover sheet may not be bonded to the back surface of the absorbent article again.

Therefore, an absorbent article is desired in which a belt member for post-treatment can be repeatedly fixed and which can be cleanly discarded by the belt member at the time of disposal.

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 having a front sheet, a back sheet, and an absorbent core; an adhesive section disposed on the back sheet for joining the absorbent article to a wearing article; and a belt member for post-treatment, the belt member having: a fixing region fixed to the main body portion; and a non-fixed region that is not fixed to the main body portion and is extensible in an extension direction, wherein the non-fixed region of the belt member includes a 1 st layer and a 2 nd layer overlapping the 1 st layer, at least the 2 nd layer of the non-fixed region is configured to be fixable to the adhesive portion after use of the absorbent article, and an area ratio of the 2 nd layer to the 1 st layer in an extended state of the belt member is lower than an area ratio of the 2 nd layer to the 1 st layer in a natural state in which the non-fixed region is not extended.

Drawings

Fig. 1 is a plan view of an absorbent article according to an embodiment viewed from the skin-facing surface side.

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

Fig. 3 isbase:Sub>A sectional view of the absorbent article taken along linebase:Sub>A-base:Sub>A shown in fig. 1.

Fig. 4 is a perspective view of the absorbent article in a state of being rolled up in the front-rear direction.

Fig. 5 is a schematic cross-sectional view of a belt member of an embodiment.

Fig. 6 is a schematic plan view showing the 2 nd surface side (non-skin-facing surface side) of the belt member.

Fig. 7 is a diagram showing an example of a plan view of the belt member.

Fig. 8 is a schematic cross-sectional view of a belt member of a modification.

Description of the reference numerals

10. An absorbent article; 20. a main body portion; 21. a surface sheet; 22. a back sheet; 23. an absorbent core; 60. a belt member; 61. a fixed area; 64. a non-fixed region; 65. layer 1; 66. a 2 nd layer; 70. an adhesive portion; 80. packaging the sheet; l, the front-back direction; w, width direction.

Detailed Description

(1) Brief description of the embodiments

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

An absorbent article according to one embodiment has: a front-back direction; a width direction orthogonal to the front-rear direction; a main body section having a front sheet, a back sheet, and an absorbent core; an adhesive section disposed on the back sheet for joining the absorbent article to a wearing article; and a belt member for post-treatment, the belt member having: a fixing region fixed to the main body portion; and a non-fixed region that is not fixed to the main body portion and is extensible in an extension direction, wherein the non-fixed region of the belt member includes a 1 st layer and a 2 nd layer overlapping the 1 st layer, at least the 2 nd layer of the non-fixed region is configured to be fixable to the adhesive portion after use of the absorbent article, and an area ratio of the 2 nd layer to the 1 st layer in an extended state of the belt member is lower than an area ratio of the 2 nd layer to the 1 st layer in a natural state in which the non-fixed region is not extended.

The user can hold the absorbent article in a disposal state such as a state in which the absorbent article is rolled up by fixing the non-fixed region of the belt member to the adhesive section after the absorbent article is used. In this case, the user can fix the 2 nd layer to the adhesive part in an extended state in which the non-fixed region is extended. In the elongated state, the area ratio of the 2 nd layer to the 1 st layer is lower than that in the natural state. This difference in area ratio is caused by the fact that the 1 st layer is easily elongated and the 2 nd layer is hardly elongated when elongated. Therefore, in the extended state, a region in which only the 1 st layer is disposed (a region in which the 1 st layer is disposed and the 2 nd layer is not disposed) is formed more frequently than in the natural state. The region in which only the 1 st layer is disposed is thinner than the regions in which the 1 st layer and the 2 nd layer are disposed, and the contact area with the adhesive portion is small, and the bonding force with the adhesive portion is likely to be reduced. Therefore, even when the adhesive tape member fails, the tape member can be easily peeled from the adhesive part and repeatedly fixed to the adhesive part. As a result, the belt member can be discarded cleanly at the time of disposal.

In the absorbent article according to one embodiment, the difference Δ E between the back sheet and the 2 nd layer may be 3.0 or more.

When the 2 nd layer is attached to the adhesive portion of the back sheet, the user can easily distinguish and identify the 2 nd layer and the back sheet. Therefore, the user can remount the layer 2 remaining on the adhesive portion as a mark when remounting the tape member.

The layer 1 may be disposed to face the back surface sheet and fixed to the back surface sheet in the fixing region, the non-fixing region of the tape member may be configured to be foldable with the fixing region as a base point, and the layer 2 may be fixed to the adhesive portion in a state where the non-fixing region is foldable with the fixing region as a base point.

Layer 1 is secured to the back sheet in the securing region. The layer 1 is easily stretched when stretched, and the contact area between the back sheet and the layer 1 is easily ensured. Thus, the fixed state between the back sheet and the belt member by the fixing region is easily maintained.

The layer 2 may be disposed so as to face the back sheet, and may be fixed to the back sheet in the fixing region, the fixing region extending in a width direction of the belt member, and a length of the fixing region in the width direction may be longer than a length of the layer 2 in the width direction.

The 2 nd layer is less likely to elongate when stretched than the 1 st layer. Therefore, the cross section of the elongated belt member along the elongation direction is formed in an arc shape in which the 2 nd layer is located inward. Generally, when the absorbent article is discarded, the belt member is fixed to the main body in a state where the absorbent article is rolled up. At this time, the surface of the tape member fixed to the adhesive portion (the surface on which the 2 nd layer is disposed) is deformed into an arc shape on the inner side, so that the tape member easily extends along the main body portion and is easily fixed to the main body portion. Further, since the length in the width direction of the anchor region is longer than the length in the width direction of the 2 nd layer, the anchor region protrudes as compared to the 2 nd layer. In this protruding region, the layer 1 and the back sheet are fixed, and the fixing strength of the fixing region can be ensured.

The 1 st layer may be formed of a film and the 2 nd layer may be formed of a printed layer having ink and fragrance.

The 2 nd layer having ink makes the tape member conspicuous and is easy to be a standard when fixing the tape member to the adhesive portion. The operability is improved when the tape member is repeatedly fixed, and the tape member is easily fixed at a desired position. Further, since the fragrance is contained in the layer 2, the fragrance of the layer 2 is released when the layer 2 is once fixed to the adhesive portion and peeled off. The fragrance can alleviate the falling feeling of the user caused by the failure of the fixing belt member, and the psychological burden of the user when the absorbent article is discarded can be reduced.

The bonding force of the 2 nd layer to the 1 st layer in the elongated state may be lower than the bonding force of the 2 nd layer to the 1 st layer in the natural state.

Since the 2 nd layer is bonded to the 1 st layer with a low bonding force in the elongated state, when the 2 nd layer is peeled off from the adhesive portion after the 2 nd layer in the elongated state is fixed to the adhesive portion, the 1 st layer and the 2 nd layer are separated, and at least a part of the 2 nd layer continues to be fixed to the adhesive portion. If at least a part of the 2 nd layer is continuously fixed to the adhesive portion, the user can reattach the 2 nd layer remaining in the adhesive portion as a mark when reattaching the belt member. Therefore, even if the fixing of the belt member fails, the belt member can be attached again to an appropriate position, and can be discarded cleanly with the belt member at the time of disposal. Further, the 1 st layer and the 2 nd layer are separated, and at least a part of the 2 nd layer continues to be fixed to the adhesive portion, which results in weakening of force when the tape member temporarily fixed to the adhesive portion is peeled off. Therefore, even when the adhesive tape member fails, the tape member can be easily peeled from the adhesive part and repeatedly fixed to the adhesive part.

The 2 nd layer may be formed of a printed layer having ink, the 2 nd layer being provided with a region where cracks are formed and a region where cracks are not formed in the elongated state.

The user can recognize the state of the extended state of the belt member by visually recognizing the region where the crack is formed, and can smoothly operate the belt member. The region where the crack is formed is a region where the 2 nd layer is split and floats above the 1 st layer and the bonding force of the layer to the 1 st layer is low. The region where the crack is formed is likely to remain in the adhesive portion when it is once fixed to the adhesive portion. On the other hand, the region where no crack is formed is a region where the 2 nd layer is not cracked and the bonding force of bonding to the 1 st layer is high. The region where no crack is formed is hard to remain in the adhesive portion when the 2 nd layer is once fixed to the adhesive portion, and is easily peeled from the adhesive portion together with the 1 st layer. Therefore, when the belt member is fastened again, the visual recognition of the belt member can be ensured by the region where no crack is formed. By having the region where the crack is formed and the region where the crack is not formed, the layer 2 remaining on the adhesive portion can be remounted as a mark in the event of failure of the fastening tape member.

(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, a tape-type disposable diaper, a pants-type disposable diaper, a panty liner, a breast pad, an adult incontinence pad, a feces pad, or a sweat barrier sheet. The absorbent article may be used by being attached to the inside of a wearing article such as underwear.

In the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, the drawings are schematic, and it should be noted that the scale of each dimension and the like may be different from those in reality. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings also include portions having different dimensional relationships and ratios from each other.

Fig. 1 is a plan view of an absorbent article 10 according to embodiment 1, viewed from the skin-facing surface side. Fig. 2 is a plan view of the absorbent article 10 according to embodiment 1, viewed from the non-skin-facing surface side. Here, the "skin-facing surface side" corresponds to a side facing the skin of the wearer during use. The "non-skin-facing side" corresponds to the side facing the skin of the wearer during use. Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A shown in fig. 1, and fig. 4 isbase:Sub>A perspective view of the absorbent article inbase:Sub>A state of being rolled up in the front-rear direction. In fig. 2, the packaging sheet shown in fig. 1 is omitted for convenience of explanation.

The absorbent article 10 has a front-rear direction L and a width direction W. The front-back direction L is a direction extending from the front side (ventral side) to the back side (dorsal side) of the wearer or a direction extending from the back side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L.

The absorbent article 10 has a main body 20 and a belt member 60 for post-treatment. The main body portion 20 includes a front surface sheet 21 facing the skin of the wearer, a back surface sheet 22 facing the side opposite to the skin of the wearer, and an absorbent core 23 disposed between the front surface sheet 21 and the back surface sheet 22. The surface sheet 21 is a side facing the skin of the wearer during use. The back sheet 22 faces the side opposite the wearer's skin during use. The absorbent core 23 contains an absorbent material for absorbing body fluid, which extends in the front-rear direction L of the absorbent article 10.

The main body portion 20 may also have wings 40 and hip flaps 50. The flaps 40 are folded back toward the non-skin-facing surface side of the crotch of the worn article when in use. The hip flaps 50 are portions that bulge out in the width direction W at positions rearward of the flaps 40. The hip flap 50 is a portion that bulges outward beyond the outer edge of the absorbent core 23 in the width direction W.

The main body portion 20 has an excretory opening facing region S1 that faces an excretory opening (e.g., vaginal opening) of the wearer during use. The excretory opening opposing region S1 corresponds to a region disposed in the crotch of the wearer, i.e., between the legs of the wearer, and in which the absorbent core 23 is present.

As shown in fig. 2, the main body portion 20 has an adhesive portion 70 provided on the non-skin-facing surface side T2 of the back sheet 22. The adhesive section 70 is a region provided with an adhesive for fixing the absorbent article 10 to a wearing article. The absorbent article 10 can be joined to a wearing article such as underwear by the adhesive section 70 provided on the non-skin-facing surface side T2 of the back sheet 22. As shown in fig. 4, the adhesive section 70 may be used to secure the belt member 60 in a rolled state of the absorbent article 10 after the absorbent article 10 is used, and the rolled state may be maintained. Therefore, the adhesive part 70 can be used for both the purpose of bonding to clothes and the purpose of fixing the belt member 60 for post-treatment.

The bonding portion 70 is provided in a region overlapping the absorbent core 23 in the thickness direction of the absorbent article 10. Preferably, the adhesive portion 70 extends continuously or intermittently from at least the excretory opening opposing region S1 toward the rear of the absorbent article 10. The adhesive portion 70 extends in the front-rear direction, and is provided in plurality with a space in the width direction. In another embodiment, the adhesive portion 70 may extend in the width direction W and be provided in plurality with a space in the front-rear direction L. The main body 20 may have flap adhesive portions 42 provided to the flaps 40 and hip flap adhesive portions 52 provided to the hip flaps 50.

The absorbent article 10 may be configured such that the adhesive portion 70 is protected by the wrapping sheet 80 to prevent the adhesive portion 70 from deteriorating before the absorbent article 10 is used. The packing sheet 80 abuts against the adhesive portion 70. In this case, the area of the wrapping sheet 80 is larger than the area of the adhesive part 70 in order to cover the entire adhesive part 70. When the absorbent article 10 is used, the adhesive part 70 is exposed by peeling the absorbent article from the packaging sheet 80, and the absorbent article 10 can be fixed to a wearing article by the adhesive part 70.

In another embodiment, a release sheet may be provided to cover the adhesive portion 70. The release sheet may be disposed between the adhesive portion 70 and the packaging sheet 80. In this aspect, the release sheet protects the adhesive portion 70, thereby preventing deterioration of the adhesive portion 70 before the absorbent article 10 is used. The area of the release sheet is larger than the area of the adhesive part 70 in order to cover the entire adhesive part 70. When the release sheet is peeled off at the time of using the absorbent article, the adhesive part 70 is exposed, and the absorbent article 10 can be fixed to the wearing article by the adhesive part 70.

As shown in fig. 2 and 3, the tape member 60 is disposed between the adhesive portion 70 and the outer edge of the main body portion 20 in plan view. The belt member 60 of the present embodiment is disposed between the rear end edge of the adhesive section and the rear end edge of the main body section. As shown in fig. 2, the belt member 60 has one end 60A on the side of the fixed region 61, the other end 60B on the side of the non-fixed region 64, and a pair of side edges 60C extending from the one end 60A toward the other end 60B. The belt member 60 may have a 1 st direction D1 from the one end 60A side toward the other end 60B side of the belt member 60 and a 2 nd direction D2 orthogonal to the 1 st direction D1. The one end 60A of the belt member 60 may be one end in the longitudinal direction of the belt member 60. The 1 st direction D1 of the present embodiment is along the longitudinal direction of the belt member 60 and along the front-rear direction L of the absorbent article 10. In another aspect, the one end 60A of the belt member 60 may be one end in the short-side direction of the belt member 60. In another aspect, the 1 st direction D1 may be along the width direction of the belt member 60 and along the width direction of the absorbent article. In addition, the 1 st direction D1 may be a direction in which the belt member 60 is pulled out at the time of operation. Thus, the length of the belt member 60 in the 1 st direction D1 may be longer than the length of the belt member 60 in the 2 nd direction D2.

The belt member 60 may be configured to be fixed to the main body portion 20 in a state of being rolled up with the skin-facing surface side of the absorbent article 10 being the inside when the absorbent article 10 is discarded, and to maintain the rolled-up state of the absorbent article 10. The band member 60 may have a fixed region 61 and a non-fixed region 64. The fixing region 61 is fixed to the main body portion 20. The fixing region 61 of the present embodiment is fixed to the back surface sheet 22 of the main body 20 by an adhesive portion 61 a. The fixing region 61 is fixed to the back sheet 22 and configured not to be peeled off from the back sheet 22 when the belt member 60 is used (when the absorbent article is discarded). The fixing region 61 may be provided at one end 60A, i.e., a rear end edge, of the belt member 60 in the 1 st direction D1. The fixing region 61 may not coincide with the one end 60A, or may be separated from the one end 60A. The fixing region 61 may be disposed closer to the one end 60A than the center of the belt member 60 in the 1 st direction D1.

The non-fixed region 64 is not fixed to the main body portion 20, and is configured to be extensible in the extending direction. The extension direction of the non-fixed region 64 may be either the 1 st direction D1 or the 2 nd direction D2. The extending direction of the non-fixed region 64 of the present embodiment is the 1 st direction D1, and the non-fixed region 64 can extend in a direction away from the fixed region 61 with the fixed region 61 as a base point. The user may stretch the band member to extend the band member outward from the outer edge of the main body portion 20. Here, "elongation" includes elongation caused by "elastic deformation" or "plastic deformation". As an example, the belt member 60 may be formed of a stretchable sheet or film. The non-fixed region 64 is configured to be fixable to the adhesive portion 70 of the main body portion 20. The non-fixed region 64 is a portion where the user operates the band member 60. More specifically, when using the belt member 60, the user grips the non-fixed region 64, folds back the non-fixed region 64 with the fixed region 61 as a base point, or extends the non-fixed region 64 in the 1 st direction D1 to fix the non-fixed region 64 to the main body portion 20. At least a part of the non-fixed region 64 constitutes a grip portion that can be gripped by a user. The grip portion may be provided over the entire non-fixed region 64, or may be provided on one end side of the non-fixed region 64 on the side opposite to the fixed region 61.

The belt member 60 may have a temporary fixing region (not shown) detachably joined to the body portion 20. The temporarily fixing region is configured to be peeled from the back sheet 22 when the belt member 60 is used (when the absorbent article is discarded). Preferably, the temporarily attached region is not peeled off from the back sheet 22 before the belt member 60 is used (when the absorbent article 10 is used). By providing the temporary fixing region, it is possible to suppress the non-fixing region 64 from curling or the non-fixing region 64 from bending before the belt member 60 is used (during manufacturing or wearing). The temporary fixing region may be adjacent to the fixing region 61 and the non-fixing region 64 in the 1 st direction, or may be disposed on the other end 60B side of the fixing region 61 and on the one end side of the non-fixing region 64.

The joining strength of the belt member 60 and the back surface sheet 22 in the temporary fixing region may be lower than the joining strength of the belt member 60 and the back surface sheet 22 in the fixing region 61. Since the engagement force of the temporarily fixing region is lower than that of the fixing region 61, the user can easily peel off the temporarily fixing region and grasp the non-fixing region 64 to operate the belt member 60 when using the belt member 60. Examples of the joining means of the fixing region 61 and the provisional fixing region include an adhesive, embossing, thermal welding, and ultrasonic welding. The fixing region 61 and the temporary fixing region may be formed by embossing the outer edge of the main body portion 20.

Fig. 5 is a schematic enlarged view of a portion of the belt member 60 of the cross section shown in fig. 3. Fig. 5 (a) shows a natural state, and fig. 5 (b) shows an extended state. The unsecured region 64 of the strap member 60 has a layer 1 65 and a layer 2 66. The 1 st layer 65 and the 2 nd layer 66 overlap in the thickness direction T. The 1 st layer 65 is disposed on the skin-facing surface side T1 (back sheet side) of the 2 nd layer 66 and faces the back sheet 22. In addition, the 1 st layer 65 and the 2 nd layer 66 of the present embodiment are also provided in the fixing region 61. The 1 st layer 65 is fixed to the back sheet 22 via an adhesive portion 61a in the fixing region 61. The 1 st layer 65 of the present embodiment is formed of a film composed of 3 layers of polypropylene, styrene rubber, and polypropylene, and the 2 nd layer 66 is formed of a printed layer having ink.

The ratio of the area of the 2 nd layer 66 relative to the 1 st layer 65 in the extended state with the non-immobilized areas 64 extended is lower than the ratio of the area of the 2 nd layer 66 relative to the 1 st layer 65 in the natural state with the non-immobilized areas 64 not extended. The area ratio is a ratio of an area occupied per unit area, and is, for example, an area of the 2 nd layer 66 with respect to an area of the 1 st layer 65 arranged in a range of 10mm × 10mm of the elongated belt member. Fig. 6 (a) is a schematic plan view showing the 2 nd layer 66 side (non-skin-facing surface side) of the belt member 60 in the natural state shown in fig. 5 (a), and fig. 6 (b) is a schematic plan view showing the 2 nd layer 66 side (non-skin-facing surface side) of the belt member 60 in the extended state shown in fig. 5 (b). In the region where the 2 nd layer 66 is provided in the natural state, the 2 nd layer 66 is not cracked, and the 2 nd layer 66 covers substantially the entire 1 st layer 65. In contrast, in the extended state, the 2 nd layer 66 is provided with a region where the 2 nd layer 66 is split and a region where the 2 nd layer is not split. Here, the cracking refers to a region in which the spacing between particles of the ink constituting the 2 nd layer is 50 μm or more in a plan view. In the non-fixed region 64 in the extended state, more regions are provided in which only the layer 1 65 is disposed than in the natural state. The user can recognize the state of the band member 60 in the extended state by visually recognizing the region where the crack is formed, and can smoothly operate the band member 60. The region where the crack is formed is a region where the 2 nd layer 66 is separated and floats from the 1 st layer 65, and the bonding force of the layer to the 1 st layer 65 is low. The region where the crack is formed is likely to remain in the adhesive portion 70 when it is temporarily fixed to the adhesive portion 70. On the other hand, the region where no crack is formed is a region where the 2 nd layer 66 is not cracked and the bonding force thereof to the 1 st layer 65 is high. The region where no crack is formed is hard to remain in the adhesive portion when the 2 nd layer 66 is once fixed to the adhesive portion, and is easily peeled from the adhesive portion 70 together with the 1 st layer 65. Therefore, when the belt member is fastened again, the visual recognition of the belt member 60 can be ensured by the region where no crack is formed. By having the region where the crack is formed and the region where the crack is not formed, the layer 2 remaining on the adhesive portion can be remounted as a mark in the event of failure of the fastening tape member.

Here, the extended state may be an extended state in which an extension limit is recommended. The recommended elongation state may not be the elongation limit at which the tape does not break physically, but rather the elongation limit recommended by the designer. The recommended elongation limit may be an upper limit at which the belt member can be elongated without breaking, or an upper limit at which the belt member can be elongated without changing the physical properties of the belt member. The recommended elongation limit can be designed to be, for example, 70% to 80% of the elongation at break (hereinafter referred to as elongation at break). The safety factor is 70% to 80%, and can be set as appropriate. The elongation at break ratio can be calculated from the length in the elongation state at break/the length in the natural state. Here, the natural state refers to a state in which the absorbent article contained in the package is taken out of the package and left to stand in an atmosphere of 20 ℃ ± 2 ℃ and relative humidity 60% ± 5% rh for 24 hours. The belt member of the present embodiment is broken by being elongated to a length 5 times the length in the natural state. Therefore, the elongated state may be a state elongated 4 times.

Next, an example of a usage form of the absorbent article configured as above will be described. When the user uses the absorbent article 10, the wrapping sheet 80 is unfolded, and the adhesive part 70 of the main body part 20 and the wrapping sheet 80 are peeled off. Thereby, the adhesive portion 70 of the main body portion 20 is exposed. The belt member 60 is joined to the back sheet 22 via the fixing region 61. Next, the absorbent article 10 is used by fixing the adhesive section 70 to a wearing article such as underwear. After the absorbent article 10 is used, the main body portion 20 is peeled off from the wearing article. The absorbent article 10 is rolled from the front end edge side (the side where the belt member is not disposed) of the absorbent article 10 with the skin-facing surface of the absorbent article 10 as the inner side. By folding back the non-fixed region 64 with the fixed region 61 as a base point and extending the non-fixed region 64 by gripping the non-fixed region 64 of the belt member 60, at least a part of the belt member 60 is extended outward from the outer edge of the main body portion 20. The absorbent article 10 can be maintained in a rolled state by fixing the 2 nd layer 66 of the belt member 60 to the adhesive section 70 or the like.

When the belt member 60 is fixed to the adhesive section 70 when the absorbent article is discarded, the user can fix the 2 nd layer 66 to the adhesive section 70 in an extended state in which the non-fixed region 64 is extended. In the stretched state, the area ratio of the 2 nd layer 66 to the 1 st layer 65 is low as compared with the natural state. This difference in area ratio is caused by the 1 st layer 65 being easily elongated and the 2 nd layer 66 being hardly elongated when elongated. Therefore, in the extended state, the region in which only the 1 st layer 65 is disposed (the region in which the 1 st layer 65 is disposed and the 2 nd layer 66 is not disposed) is formed more than in the natural state. The thickness of the region where only the 1 st layer 65 is arranged is smaller than that of the region where the 1 st layer 65 and the 2 nd layer 66 are arranged, the contact area with the adhesive portion 70 is small, and the bonding force with the adhesive portion 70 is likely to be reduced. Therefore, even when the adhesive tape member 60 fails, the tape member 60 can be easily peeled off from the adhesive part 70, and the tape member 60 can be repeatedly fixed to the adhesive part 70. As a result, the belt member 60 can be discarded cleanly at the time of disposal.

The bonding force with which the 2 nd layer 66 is bonded to the 1 st layer 65 in the stretched state may be lower than the bonding force with which the 2 nd layer 66 is bonded to the 1 st layer 65 in the natural state. When the user stretches the belt member 60, the 1 st layer 65 is elongated, and the 2 nd layer 66 is elongated at a lower elongation than the 1 st layer 65, so that a gap is easily generated between the 1 st layer 65 and the 2 nd layer 66 according to the difference in elongation of the 1 st layer 65 and the 2 nd layer 66. Thus, the bonding force with which the 2 nd layer 66 is bonded to the 1 st layer 65 in the extended state is lower than the bonding force with which the 2 nd layer 66 is bonded to the 1 st layer 65 in the natural state.

Here, the bonding force of the 2 nd layer 66 to the 1 st layer 65 can be measured from a state in which the 2 nd layer 66 continues to adhere to the adhesive part 70 when the 2 nd layer 66 is peeled off from the adhesive part 70 after the 2 nd layer 66 is adhered to the adhesive part 70. Specifically, the tape member 60 in a natural state and the tape member 60 in an extended state were used to attach the 2 nd layer 66 of the tape member 60 to the adhesive part 70, and 30g/cm was applied from above ² The load of (2). Next, the tape member 60 is peeled off from the adhesive portion 70 after 60 seconds have elapsed. At this time, in the form of a large area of the 2 nd layer 66 adhering to the adhesive part 70, the bonding force of the 2 nd layer 66 to the 1 st layer 65 is low.

Since the 2 nd layer 66 is bonded to the 1 st layer 65 with a low bonding force in the stretched state, when the 2 nd layer 66 is peeled off from the adhesive part 70 after the 2 nd layer 66 is fixed to the adhesive part 70, the 1 st layer 65 and the 2 nd layer 66 are separated, and at least a part of the 2 nd layer 66 is continuously fixed to the adhesive part 70. When at least a part of the 2 nd layer 66 continues to be fixed to the adhesive part 70, the user can remount the 2 nd layer 66 remaining in the adhesive part 70 as a mark when remounting the tape member 60. Therefore, even if the fixing of the belt member 60 fails, the belt member 60 can be attached to an appropriate position again, and can be discarded cleanly with the belt member 60 at the time of disposal. Further, the 1 st layer 65 and the 2 nd layer 66 are separated, and at least a part of the 2 nd layer 66 continues to be fixed to the adhesive portion 70, which results in weakening of the force when the tape member 60 temporarily fixed to the adhesive portion 70 is peeled off. Therefore, even when the fixing of the tape member 60 fails, the tape member 60 can be easily peeled off from the adhesive portion 70, and the tape member 60 can be repeatedly fixed to the adhesive portion 70.

The color difference Δ E between the back sheet 22 and the 2 nd layer 66 may be 3.0 or more. As a result of various studies by the applicant, it has been found that a user can easily recognize two regions as different regions when the color difference Δ E is 3.0 or more. By setting the color difference Δ E between the back sheet 22 of the main body 20 and the 2 nd layer 66 to 3.0 or more, the user can easily recognize the main body 20 and the belt member 60 as separate bodies, and can easily recognize the presence of the belt member 60. When the 2 nd layer 66 is attached to the adhesive 70, the user can easily distinguish and identify the 2 nd layer from the back sheet 22. Thus, the user can reattach the layer 2 66 remaining on the adhesive portion 70 as a mark when reattaching the band member 60.

The color difference Δ E between the back sheet 22 and the 2 nd layer 66 can be obtained by measuring the color of two points (two areas) to be measured using a commercially available color measuring instrument and comparing the values obtained by converting the color space into a CIE1976 (L a b) color space defined in JIS Z8729. Specifically, when the difference between L and a between two points to be measured is Δ L, the difference between a and b is Δ b, the difference Δ E = [ (Δ L) = is used ² +(Δa*) ² +(Δb*) ² ] ^1/2 And (4) obtaining.

The color difference Δ E between the back sheet 22 and the 2 nd layer 66 may be provided by providing a colored portion on the 2 nd layer of the belt member 60, by providing a colored portion on the back sheet 22 of the main body portion 20, or by providing a colored portion on both the belt member 60 and the main body portion 20. The colored portion may be formed of a sheet itself such as a tape member colored with a pigment or the like, or may be formed of a printed layer. In the present embodiment, the visually recognizable state is a state that can be visually recognized in an environment where the illuminance (lx) is from 100 (lx) to 1000 (lx). The tape member of the present embodiment is made conspicuous by the ink of the 2 nd layer, and is easily a standard when the tape member is fixed to the adhesive portion. The operability is improved when the tape member is repeatedly fixed, and the tape member is easily fixed at a desired position.

The 1 st layer 65 is opposed to the back sheet 22 in a state before the belt member 60 is used. The layer 1 65 is secured with the back sheet 22 in the securing region 61. The 1 st layer 65 is easily extended when stretched, and the contact area between the back surface sheet 22 and the 1 st layer 65 is easily ensured. Therefore, the fixed state of the back sheet 22 and the belt member 60 by the fixing region 61 is easily maintained. The electrostatic force of the 1 st layer 65 formed by the film is higher compared to the 2 nd layer 66 formed by the printed layer. Thus, the non-fixed region 64 can be temporarily bonded to the back sheet 22 with static electricity before use. Thus, the condition in which the belt member 60 is unintentionally curled can be suppressed.

The 2 nd layer 66 may be formed from a printed layer having ink and fragrance. Since the layer 2 contains the perfume, when the layer 2 66 is once fixed to the adhesive part 70 and peeled off, the perfume of the layer 2 66 is released. The fragrance can alleviate the feeling of the user falling down due to failure of the fastening tape member 60, and the psychological burden when the absorbent article is discarded can be reduced.

The surface sheet 21 of the main body 20 may be coated with a material for reducing the friction coefficient. The material may be a trioxypropylene glycol compound or a triglyceride. By providing the material on the top sheet 21, the friction coefficient of the top sheet 21 is reduced, and when the absorbent article 10 after use is rolled up, the back sheet 22 easily slips against the top sheet 21, and the absorbent article 10 is easily rolled up. The friction coefficient may be a dynamic friction coefficient measured according to the method described on page 3.1 of JIS P8147.

Fig. 7 is a diagram showing an example of a plan view of the belt member 60, in which fig. 7 (a) shows a natural state and fig. 7 (b) shows an extended state. The belt member 60 may be provided with a display unit 68 for displaying characters, pictures, and the like. The display unit 68 may be constituted by the 1 st layer 65 or the 2 nd layer 66. The display unit 68 can display the use method of the belt member such as the direction of extension to the user or can make it easy to recognize the presence of the belt member. As shown in fig. 7, it may be possible to make it difficult to recognize characters on the display portion in a natural state and to easily recognize characters on the display portion 68 in an extended state. Since the user cannot recognize the display portion 68 in a natural state, the belt member 60 may be extended to recognize the display portion 68. Thus, the user can be encouraged to subconsciously perform operations related to the use of the belt member 60.

In the belt member 60 of the present embodiment, at least a part of the non-fixed region 64 is extended outward from the outer edge of the main body portion 20 by folding back the non-fixed region 64 with the fixed region 61 as a base point. The belt member 60 may be disposed inside the outer edge of the main body 20 in an unfolded state. The belt member 60 may be in a state of being covered by the main body portion 20 when viewed from the skin-facing surface side.

The band member 60 of the present embodiment is configured to be extensible, and is disposed inward of the outer edge of the main body portion 20 in a natural state. As another example, the belt member may be formed of a sheet folded in a zigzag shape. In this case, the user stretches the tip end of the belt member 60 to unfold the folded belt member 60, thereby extending the belt member 60 outward from the outer edge of the main body portion 20.

With such a configuration, since the belt member 60 is disposed on the non-skin-facing surface side of the back sheet 22 at a position inward of the outer edge of the main body portion 20 during use of the absorbent article 10, body fluid such as menstrual blood does not adhere to the belt member 60. After the absorbent article 10 is used, the user can hold the absorbent article 10 in a rolled state by fixing the belt member 60 extending outward to the adhesive section 70 and the like. Here, since body fluid such as menstrual blood does not adhere to the tape member 60, a decrease in the joining force between the tape member 60 and the adhesive portion 70 or a decrease in the joining force of the fixing means of the tape member 60 can be prevented.

Further, since the belt member 60 is provided on the non-skin-facing surface side of the back sheet 22 and does not extend outward from the outer edge of the main body portion 20 during use of the absorbent article 10, the belt member 60 does not directly contact the skin of the wearer. Therefore, discomfort and annoyance during use can be reduced.

Preferably, the belt member 60 is provided on the rear side of the center of the body portion 20 in the front-rear direction L. When the user wants to roll the absorbent article 10 into a group, the user usually starts rolling up the absorbent article 10 in the front-rear direction L from the front end edge E1 or the rear end edge E2 of the absorbent article 10. Among these, a user of about 8 turns up from the front end edge E1 of the absorbent article 10. Therefore, the belt member 60 is preferably provided in a region located on the rear side of the center in the front-rear direction L. At least a part of the belt member 60 may be disposed across the rear end edge of the absorbent core 23 or on the rear side of the rear end edge of the absorbent core.

An example of a specific structure of the absorbent article of the present embodiment is shown. The surface sheet may be composed of a weight per unit area of 30g/m ² The hot air non-woven fabric (PE/PET) of (1). It is possible that a second sheet is provided between the topsheet and the absorbent core. The second sheet may be formed of the same material as the surface sheet. The front sheet may not be disposed on the outer side in the width direction of the main body, and the side sheet may be disposed. The side sheet may have a weight per unit area of 13g/m ² The SMS nonwoven fabric (PP). It may be that the absorbent material of the absorbent core is formed 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 excretion portion-corresponding region S1 may be made higher than the weight per unit area of the surrounding absorbent core. The weight per unit area of the absorbent core of the region including the excretory opening opposing region S1 may be 950g/m ² The weight per unit area of the surrounding absorbent core may be 300g/m ² . The back sheet may have a weight per unit area of 23.5g/m ² The polyethylene film (non-breathable type) of (4). The absorbent article may be formed by compressing the surface sheet and the absorbent core in the thickness directionAnd a compression part. The main body bonding part may be formed of a rubber-based hot-melt adhesive. The weight per unit area of the body bonding part may be 27g/m ² . The number of the main body bonding portions may be 6 in the width direction. The length of each main body bonding portion in the width direction may be 5mm, and the length of each main body bonding portion in the front-rear direction may be 320mm. The length of the absorbent article in the front-back direction may be 420mm, and the length of the absorbent article in the width direction may be 200mm. The 1 st layer of the belt member 60 for post-treatment may have a basis weight of 10g/m ² Polypropylene layer of (2), 10g/m ² Styrene-based rubber layer and a weight per unit area of 10g/m ² Is laminated with the polypropylene layer of (a). The length of the belt member 60 in the front-rear direction may be 55mm, and the length of the belt member 60 in the short side direction may be 25mm. The belt member 60 may use 60g/m ² The rubber-based hot-melt adhesive is bonded to the main body. The adhesive may be applied in a range of 21mm in width and 12mm in length. The 2 nd layer of the belt member 60 may be a printed layer using a pink styrene-based ink.

Next, an absorbent article according to a modification will be described. Note that the same reference numerals are used for the same components as those in the above-described embodiment, and description thereof is omitted. Fig. 8 is an enlarged cross-sectional view schematically showing a modified example of the belt member. Fig. 8 (a) is a cross section along the longitudinal direction in a natural state, fig. 8 (b) is a cross section along the width direction in a natural state, and fig. 8 (c) is a cross section along the longitudinal direction in an extended state and in a state where the body 20 is rolled up.

In the absorbent article of the modification, the 2 nd layer 66 is disposed on the skin-facing surface side T1 of the 1 st layer 65. The 2 nd layer 66 is disposed to face the back sheet 22, and is fixed to the back sheet 22 via an adhesive portion 61a in the fixing region 61. The 2 nd layer 66 is less likely to elongate when stretched than the 1 st layer 65. Therefore, as shown in fig. 8 (c), the cross section of the elongated belt member 60 along the elongation direction is in the shape of an arc with the 2 nd layer 66 positioned inside. Generally, when the absorbent article 10 is discarded, the belt member 60 is fixed to the main body portion 20 in a state where the absorbent article is rolled up. At this time, the surface of the tape member 60 (the surface on which the 2 nd layer is disposed) that is fixed to the adhesive section 70 is deformed into an arc shape on the inner side, so that the tape member 60 easily extends along the main body section 20 and the tape member 60 is easily fixed to the main body section 20.

The fixing region 61 extends in the width direction of the belt member 60. The width direction of the belt member 60 may be the short side direction of the belt member 60 or may be a direction orthogonal to the extending direction. The width direction of the belt member of the present embodiment is the 2 nd direction D2. The length L61 in the width direction of the fixed region 61 may be longer than the length L66 in the width direction of the 2 nd layer 66. Since the length L61 in the width direction of the anchor region 61 is longer than the length L66 in the width direction of the 2 nd layer 66, the anchor region 61 protrudes compared to the 2 nd layer 66. In this protruding region, the 1 st layer 65 and the back sheet 22 are fixed, and the fixing strength of the fixing region 61 can be ensured.

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 in modified and altered forms without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present specification is for the purpose of illustration and description, and is not intended to limit the present invention in any way. For example, the 1 st direction may be a width direction, and the 2 nd direction may be a front-rear direction.

In addition, the entire contents of Japanese patent application No. 2018-077193 filed on 12.4.2018 are incorporated in the present specification by reference.

Industrial applicability

An absorbent article can be provided in which a belt member for post-treatment can be repeatedly fixed and which can be cleanly discarded by the belt member at the time of disposal.

Claims

1. An absorbent article in which, in an absorbent article,

the absorbent article has:

a front-back direction;

a width direction orthogonal to the front-back direction;

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

an adhesive section disposed on the back sheet for joining the absorbent article to a wearing article; and

a belt member for post-treatment of a belt material,

the belt member has:

a fixing region fixed to the main body portion; and

a non-fixed region that is not fixed to the main body portion and is capable of being elongated in an elongation direction,

the non-fixed region of the belt member has a 1 st layer and a 2 nd layer superposed on the 1 st layer and disposed on a non-skin-facing surface side of the 1 st layer,

at least the 2 nd layer of the non-fixed region is configured to be capable of being fixed to the adhesive portion after use of the absorbent article,

a plurality of cracked regions of the 2 nd layer and uncracked non-cracked regions of the 2 nd layer are alternately provided in an elongated state in which both the 1 st layer and the 2 nd layer of the belt member are elongated, the 1 st layer overlapping both the cracked regions and the non-cracked regions, the area ratio of the 2 nd layer to the 1 st layer being lower than the area ratio of the 2 nd layer to the 1 st layer in a natural state in which the non-fixed region is not elongated,

the 1 st layer is formed of a film and the 2 nd layer is formed of a printed layer with ink and fragrance.

2. The absorbent article of claim 1,

the color difference Δ E between the back sheet and the 2 nd layer is 3.0 or more.

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

the layer 1 is disposed so as to face the back sheet and is fixed to the back sheet in the fixing region,

the non-fixed region of the belt member is configured to be foldable with the fixed region as a base point,

the layer 2 is fixed to the adhesive portion in a state where the non-fixed region is folded back with the fixed region as a base point.

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

the layer 2 is disposed so as to face the back sheet and is fixed to the back sheet in the fixing region,

the fixing region extends in the width direction of the belt member,

the length of the fixing region is longer than the length of the 2 nd layer in the width direction of the belt member.

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

the bonding force of the 2 nd layer to the 1 st layer in the elongated state is lower than the bonding force of the 2 nd layer to the 1 st layer in the natural state.