CN108883004B

CN108883004B - Absorbent article

Info

Publication number: CN108883004B
Application number: CN201780021561.1A
Authority: CN
Inventors: 西谷和也; 木下英之
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2016-03-30
Filing date: 2017-02-24
Publication date: 2020-04-14
Anticipated expiration: 2037-02-24
Also published as: KR101947337B1; JP6181797B1; KR20180120780A; WO2017169392A1; MY173198A; JP2017176449A; CN108883004A

Abstract

The absorbent article (1) has a folding line (FL1) for folding the skin-facing surface of the absorbent article so as to face each other. The absorber has a low-basis-weight portion (41) provided at the boundary between the central region and the rear region and extending in the width direction. The absorbent article has a 1 st joint (61) located forward of the low basis weight portion and a 2 nd joint (62) located rearward of the low basis weight portion. The elastic member (91) spans the low basis weight portion or a region extending outward in the width direction from the low basis weight portion. The folding line is provided in the low basis weight portion so that the low basis weight portion bulges toward the wearer side by contraction of the elastic member in the expanded state of the absorbent article.

Description

Absorbent article

Technical Field

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

Background

Absorbent articles worn in underwear such as sanitary napkins, panty liners, and incontinence pads are known. A joint section for joining to underwear is provided on the non-skin-facing surface of the absorbent article. The absorbent article described in patent document 1 has at least a wing part joining part and a hip part joining part. When the absorbent article of patent document 1 is worn, the wing part joint parts and the hip flap joint parts are joined to the undergarment in a state where the undergarment is separated from the body, and the absorbent article is lifted up through the undergarment.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-72651

Disclosure of Invention

Generally, underwear is made of a stretchable material and stretches so as to fit the body of a wearer when worn. On the other hand, the entire absorbent article is not stretched so as to fit the body when worn. Therefore, when the absorbent article and the undergarment are lifted together at the time of wearing, only the undergarment is stretched, and shear forces are generated at the wing portion joint portion and the hip flap joint portion. In particular, since the wearer lifts the undergarment by holding around the waist of the undergarment, shear force is generated at the hip flap joint portion located at the rear of the product, and the hip flap joint portion may be separated from the undergarment. When the joint portion such as the hip flap joint portion located in the rear region of the absorbent article is separated from the undergarment, the rear end edge of the absorbent article is bent toward the skin-facing surface side during wearing, or the position of the rear region of the absorbent article is shifted in the width direction, which may cause discomfort during wearing and leakage of excrement.

Accordingly, an object of the present invention is to provide an absorbent article that can suppress the uncomfortable feeling when worn and can suppress the leakage of excrement.

An absorbent article (absorbent article 1) of the present disclosure includes: a front-rear direction (front-rear direction L) and a width direction (width direction W) orthogonal to each other; a central region (central region S1) disposed in the crotch of the wearer; a rear side region (rear region S3) located on the rear side of the central region; an absorber (absorber 30) disposed in the central region and the rear region; an elastic member (elastic member 91) that is stretchable in the front-rear direction; a joining section (joining section 60) provided on the non-skin-facing surface of the absorbent article and for joining to underwear; and a folding line (folding line FL1) extending in the width direction and configured to fold the absorbent article so that the skin-facing surfaces thereof face each other, wherein the absorbent body has a low-basis-weight portion (low-basis-weight portion 41) provided at a boundary between the central region and the rear region and extending in the width direction, the low-basis-weight portion has a lower basis weight than a center portion of the central region in the front-rear direction, the joining portion includes a 1 st joining portion (1 st joining portion 61) located forward of the low-basis-weight portion and a 2 nd joining portion (2 nd joining portion 62) located rearward of the low-basis-weight portion, and the elastic member (elastic member 91) spans the low-basis-weight portion or spans outward in the width direction from the low-basis-weight portion And an extended region provided in the low basis weight portion such that the low basis weight portion bulges toward the wearer side by contraction of the elastic member in an expanded state of the absorbent article.

Drawings

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

Fig. 2 is a back view of the absorbent article shown in fig. 1.

Fig. 3 is a sectional view of the absorbent article taken along line a-a of fig. 1.

Fig. 4 is a sectional view of the absorbent article taken along line B-B of fig. 1.

Fig. 5 is a sectional view of the absorbent article taken along line C-C of fig. 1.

Fig. 6 is a schematic perspective view of the absorbent article in an unfolded state in which the individual packages are unfolded.

Fig. 7 is a schematic enlarged view of the low area weight portion of fig. 5. Fig. 7 (a) shows an extended state in which the elastic member is extended, and fig. 7 (b) shows a contracted state in which the elastic member is contracted.

Fig. 8 is a schematic sectional view of the absorbent article in a worn state, taken along the line C-C of fig. 1. Fig. 8 (a) is a state in which the absorbent article 1 in the unfolded state is joined to underwear and before the underwear is lifted. Fig. 8 (b) shows a state where the undergarment shown in fig. 8 (a) is lifted.

Fig. 9 is a plan view of an absorbent article according to a modification.

Fig. 10 is a back view of the absorbent article shown in fig. 9.

Detailed Description

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

An absorbent article, comprising: a front-back direction and a width direction orthogonal to each other;

a central region disposed in the crotch of the wearer;

a rear region located on a rear side of the central region;

an absorber disposed in the central region and the rear region;

an elastic member that is stretchable in the front-rear direction;

a joining section provided on the non-skin-facing surface of the absorbent article and adapted to be joined to underwear; and

a folding line extending in the width direction and configured to fold the absorbent article in such a manner that skin-facing surfaces of the absorbent article face each other, wherein,

the absorbent body has a low basis weight portion provided at a boundary between the central region and the rear region and extending in the width direction,

the low basis weight portion has a lower basis weight than a center portion of the central region in the front-rear direction,

the joining portion includes a 1 st joining portion located forward of the low basis weight portion and a 2 nd joining portion located rearward of the low basis weight portion,

the elastic member spans the low basis weight portion or a region extending outward in the width direction from the low basis weight portion,

the folding line is provided in the low basis weight portion so as to cause the low basis weight portion to bulge toward the wearer side by contraction of the elastic member in an expanded state of the absorbent article.

The low basis weight portion has a lower basis weight than the center portion of the central region in the front-rear direction, and is likely to be deformed. Since the elastic member spans the low basis weight portion or a region extending outward in the width direction from the low basis weight portion, the low basis weight portion deforms so that the length in the front-rear direction is shortened by contracting the elastic member in the expanded state, and the low basis weight portion is brought into a state of contracting in the front-rear direction.

When worn, the absorbent article is lifted together with the undergarment after being fixed to the undergarment via the 1 st joint part and the 2 nd joint part in a state where the low basis weight part is contracted. At this time, the region where the low basis weight portion contracts extends as the undergarment extends, and the absorbent article deforms following the deformation of the undergarment. Thus, the 1 st joint part and the 2 nd joint part are not easily separated from the underwear when worn, and are easily maintained at the positions fixed to the underwear at an early stage. The absorbent article can be prevented from being accidentally bent or displaced when worn, and uncomfortable feeling and leakage of excrement can be prevented when worn. In particular, when the wearer holds the waist periphery of the undergarment and lifts the undergarment, even if a shearing force is generated at the 2 nd joining portion positioned at the rear of the product, the joining state of the 2 nd joining portion can be maintained, and the inconvenience that the rear end edge of the absorbent article is bent toward the skin-facing surface side or the position of the rear side region of the absorbent article is shifted in the width direction when worn can be suppressed, and the uncomfortable feeling when worn and the leakage of excrement can be suppressed.

Further, since the low basis weight portion is provided with the folding line so as to be raised toward the wearer in the unfolded state, the low basis weight portion does not obstruct the joining between the undergarment and the joined portion, and the joined position of the absorbent article can be maintained, and the uncomfortable feeling during wearing and the leakage of excrement can be suppressed.

It is desirable for the absorbent article to be,

at least a part of the folding line is provided at a position not coinciding with the center of the low basis weight portion in the front-rear direction.

In such an absorbent article, the folding line is valley-folded with respect to the wearer, and therefore, the adjacent region adjacent to the folding line in the low basis weight portion is raised toward the wearer side from the folding line in the unfolded state. The folding line does not coincide with the center in the front-rear direction of the low unit area weight portion, but is disposed offset in the front-rear direction with respect to the center in the front-rear direction of the low unit area weight portion. In the adjacent region on the side of the end edge of the front end edge of the unit area weight portion and the rear end edge of the low unit area weight portion which is located away from the folding line, the longitudinal length of the bulge in the expanded state of the absorbent article is long, and the bulge is more likely to bulge toward the wearer side. The low basis weight portion does not inhibit the joining between the undergarment and the joined portion, and the joined position of the absorbent article can be maintained, and the uncomfortable feeling during wearing and the leakage of excrement can be further suppressed.

It is desirable for the absorbent article to be,

the absorptive article has a skin-facing sheet provided on the side of the skin-facing surface with respect to the absorptive body,

the skin surface sheet is not joined to a member provided on a non-skin-facing surface side of the skin surface sheet in a region overlapping the low basis weight portion.

In the absorbent article, the skin surface sheet is not joined to the member provided on the non-skin-facing surface side of the skin surface sheet in the low basis weight portion, and therefore, when the low basis weight portion is deformed so as to be contracted by the elastic member, the skin surface sheet is easily deformed so as to bulge toward the wearer side. By deforming the skin surface sheet so as to bulge toward the wearer, the skin surface sheet stretches along with the elongation of the undergarment when the undergarment is lifted, and the shear force generated at the joint portion can be suppressed.

It is desirable for the absorbent article to be,

the absorptive article has a non-skin surface sheet provided on a non-skin-facing surface side of the absorptive body,

the skin-facing sheet is not joined to the absorbent body at a region overlapping the low basis weight portion,

the non-skin-facing sheet is joined to the absorbent body at a region overlapping the low basis weight portion.

In such an absorbent article, the skin-facing surface side of the absorbent body is less rigid than the non-skin-facing surface side of the absorbent body because the skin-facing surface sheet and the absorbent body are not joined and the non-skin-facing surface sheet and the absorbent body are joined. Therefore, when the low basis weight portion is deformed so as to contract by the elastic member, the low basis weight portion is likely to bulge toward the skin-facing surface side. The low basis weight portion in the state of being contracted in the front-rear direction does not obstruct the joining between the underwear and the joined portion, and the joined position of the absorbent article can be maintained, and the uncomfortable feeling during wearing and the leakage of excrement can be further suppressed.

It is desirable for the absorbent article to be,

the low basis weight portion is disposed in a region not overlapping the joint portion.

With such an absorbent article, when the low basis weight portion contracts, the joining portions can be prevented from sticking to each other, and the joined state between the absorbent article and the underwear can be maintained by the joining portions. The absorbent article can be prevented from being accidentally folded or displaced when worn, and further, uncomfortable feeling and leakage of excrement can be prevented when worn.

It is desirable for the absorbent article to be,

the rear end edge of the 2 nd joining portion is disposed rearward of a contraction region contracted in the front-rear direction by the elastic member.

In such an absorbent article, the 2 nd joining part located rearward of the contracted region is less likely to contract due to contraction of the elastic member in the expanded state, and the joined state to the underwear is easily maintained. Further, when the undergarment is lifted up, the contraction region is elongated with the deformation of the undergarment, and the joined state between the 2 nd joining part located rearward of the contraction region and the undergarment is easily maintained. This can maintain the joint position of the absorbent article, and further suppress discomfort and leakage of excrement when worn.

It is desirable for the absorbent article to be,

the absorbent article has a hip flap bulging outward in the width direction in the rear region,

said joint comprises a 3 rd joint provided in said hip flap,

the 3 rd joint portion is disposed rearward of a contraction region contracted in the front-rear direction by the elastic member.

In such an absorbent article, the 3 rd joint portion located rearward of the contracted region is less likely to contract due to contraction of the elastic member in the expanded state, and the joined state to the undergarment is easily maintained. Further, when the undergarment is lifted up, the contraction region is elongated with the deformation of the undergarment, and the joined state between the 3 rd joining part located rearward of the contraction region and the undergarment is easily maintained. The folding back and the wrinkling of the hip flaps can be suppressed, and the uncomfortable feeling and the leakage of excrement can be further suppressed when the diaper is worn.

It is desirable for the absorbent article to be,

the absorbent article has: a hip flap bulging outward in the width direction in the rear region; and

a wing portion adjacent to the hip flaps and bulging outward in the width direction in the central region,

the low basis weight portion is provided in a narrowed portion formed by narrowing the outer edges of the hip flaps and the outer edges of the wing portions inward in the width direction, or in a region extending outward in the width direction from the narrowed portion.

The central region is sandwiched between the legs of the wearer and is easily deformed by a force or the like acting from the outside in the width direction to the inside in the width direction. The low weight-per-unit-area portion is provided in the narrowed portion or in a region extending outward in the width direction from the narrowed portion, and therefore, the deformation of the central region can be suppressed from being transmitted to the hip flaps by the low weight-per-unit-area portion. This can suppress twisting and wrinkling of the hip flaps, and can suppress discomfort and leakage of excrement when worn.

It is desirable for the absorbent article to be,

the outer edge of the hip flap has a concave portion that is concave inward in the width direction,

the recessed portion is disposed in a region rearward of a rear end edge of the low basis weight portion.

In the absorbent article, the recessed portion is disposed in a region rearward of the rear end edge of the low basis weight portion, and therefore, the deformation of the low basis weight portion is suppressed from being transmitted to a position rearward of the recessed portion, and the occurrence of bending or wrinkling in the entire hip flaps can be suppressed. This can further suppress twisting and wrinkling of the hip flaps, thereby suppressing discomfort and leakage of excrement when worn.

The absorbent article of the present embodiment may be referred to as an absorbent article

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

In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the scale of each dimension and the like may be different from those of the actual structure. 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.

(1) Integral structure of absorbent article

Fig. 1 is a plan view of an absorbent article of an embodiment. Fig. 2 is a back view of the absorbent article shown in fig. 1. Fig. 3 is a sectional view of the absorbent article taken along line a-a of fig. 1. Fig. 4 is a sectional view of the absorbent article taken along line B-B of fig. 1. Fig. 5 is a sectional view of the absorbent article taken along line C-C of fig. 1.

The absorbent article 1 has a front-back direction L, a width direction W, and a thickness direction T. 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 thickness direction T is a direction extending from the skin-facing surface side T1 of the wearer to the non-skin-facing surface side T2, and is a direction perpendicular to the front-back direction L and the width direction W. The skin-facing surface side T1 corresponds to a side facing the skin of the wearer when in use. The non-skin-facing surface side T2 corresponds to the side opposite to the skin-facing surface side T1 in use, that is, the side facing the opposite position to the skin of the wearer.

The absorbent article 1 has a central region S1, a front region S2, and a back region S3. The central region S1 is a region opposite to the excretory opening (e.g., vaginal opening) of the wearer. When the absorbent article 1 is worn in underwear, the central region S1 is located in the crotch portion of the underwear. That is, the central region S1 is a region disposed in the crotch of the wearer, i.e., between the legs of the wearer.

The front region S2 is located more forward than the center region S1. The front end edge of the front side region S2 defines the front end edge of the absorbent article 1. The rear region S3 is located more rearward than the central region S1. The rear end edge of the rear region S3 defines the rear end edge of the absorbent article 1. The length in the front-rear direction L of the rear region S3 is longer than the length in the front-rear direction L of the central region S1.

The wing portions 3 bulging outward in the width direction are provided in the central region S1. Further, in the rear region S3, hip flaps 4 bulging outward in the width direction W are provided. The wing portions 3 and the hip flaps 4 are adjacent in the front-rear direction. The flap portions 3 and the hip flaps 4 extend to the outer side in the width direction W than the outer side edge of the absorbent core 31 in the central region S1.

The root of the wing part forms a narrowing part formed by narrowing the outer edge of the wing part towards the inner side in the width direction. The narrowing portions are two portions in which the outer edges of the wing portions are recessed to the inside in the width direction W to the maximum extent, and are provided at the front end edges of the wing portions and the rear end edges of the wing portions. The front end edge of the flap portion 3 defines a boundary between the central region S1 and the front region S2. The rear end edge of the flap portion 3 defines a boundary between the central region S1 and the rear region S3. The front end edges of the hip flaps are coincident with the rear end edges of the wing portions, and form a narrowing portion in which the outer edges of the hip flaps and the outer edges of the wing portions are narrowed inward in the width direction. The outer edge 4E of the hip flap 4 has a wave shape having a plurality of concave portions 4C recessed inward in the width direction.

The absorbent article 1 includes a skin-facing sheet 10, a non-skin-facing sheet 20, and an absorber 30. The skin sheet 10 is provided on the skin-facing surface side T1 with respect to the absorber 30. The skin sheet 10 includes a front sheet 11 and side sheets 12. The non-skin-facing surface sheet 20 is provided on the non-skin-facing surface side T2 with respect to the absorbent body 30. The absorber 30 is provided between the skin sheet 10 and the non-skin sheet 20. The side sheet 12 covers the outer edge of the top sheet 11 in the width direction W and extends outward of the top sheet 11 in the width direction W. The side sheets 12 are disposed at the outer edge of the absorbent body 30 in the width direction W, the wing portions 3, and the hip flaps 4.

The absorber 30 is disposed at least in the central region S1 and the rear region S3. The absorber 30 may extend from the central region S1 to the front region S2. The absorbent body 30 has an absorbent core 31 containing an absorbent material for absorbing liquid and a core wrap 32 wrapping the absorbent core 31. The core wrap 32 may cover the absorbent core 31 at least at a position closer to the skin-facing surface side than the absorbent core 31.

As shown in fig. 2, in order to join the absorbent article to the undergarment S, a joint portion 60 is provided on the non-skin-facing surface of the non-skin-facing sheet 20. The joint 60 has an adhesive. The joining portions 60 include a 1 st joining portion 61 located forward of the low basis weight portion 41 described later, a 2 nd joining portion 62 located rearward of the low basis weight portion 41, a 3 rd joining portion 63 provided in the hip flap, and a 4 th joining portion 64 provided in the wing portion. The 1 st joining part 61 and the 2 nd joining part 62 are provided in a region overlapping with the absorbent body 30. The 1 st engaging portion 61 and the 2 nd engaging portion 62 are separated in the front-rear direction. The joint 60 will be described in detail later.

In the present specification, "weight per unit area of absorbent body" is measured by the following measurement method.

When the absorbent article 1 is sealed in a packaging bag or the like, a sample taken out of the packaging bag and left in this state for 12 hours in an atmosphere of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used. For an absorbent article packaged in a package, the package is opened, the folded absorbent article is unfolded, and the thickness and area of a portion for measuring the weight and density per unit area are measured. Next, the portion for measuring the weight per unit area and the density was cut from the absorbent article, and the weight of the cut portion was measured. Next, portions other than the absorbent body, such as the front sheet and the back sheet, were removed from the cut portions, and the weight of the absorbent body was measured. The weight per unit area is calculated based on the weight of the absorber and the area of the portion for measuring the weight per unit area and the density.

The measurement of "thickness of absorbent body" in the present specification is performed by the following measurement method. When the absorbent article 1 is sealed in a packaging bag or the like, a sample taken out of the packaging bag and left in this state for 12 hours in an atmosphere of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used. In the measurement, the measurement is performed in a state where the stretchable member of the absorbent article is stretched, instead of the absorbent article being put in a contracted state. And, a skin-facing sheet, a non-skin-facing sheet, etc. other than the absorbent bodyThe parts other than the absorber were removed. A thickness of a test piece was measured by using a dial gauge PEACOCK manufactured by Kawasaki, Inc., using a gauge having a diameter of 10mm, and preparing a test piece having a size of 30 mm. times.30 mm. The measuring pressure applied by the measuring device to the test piece is adjusted to 3g/cm². Here, the above measurement was performed for 10 samples in each state, and the average value was taken as the thickness.

The "length" in the present specification is measured by the following measurement method. When the absorbent article 1 is sealed in a packaging bag or the like, a sample taken out of the packaging bag and left in this state for 12 hours in an atmosphere of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used. Next, the length of the measurement target site in this state was measured so as to be along the measurement target site using a flexible tape (tape portion: glass fiber as a base material and vinyl chloride as a cover layer) manufactured by japan affinity measure. Here, the above measurement was performed for 10 samples in each state, and the average value was taken as the length.

(2) Detailed structure of absorbent

The absorber 30 has a low basis weight portion 41. The low basis weight portion 41 has a lower basis weight of the absorbent than the absorbent in the central portion in the front-rear direction of the central region. The "low basis weight portion" refers to a region formed of the absorbent core 31 having a lower basis weight than the absorbent core 31 positioned at the center in the front-rear direction of the central region, or a region having no absorbent core 31. As described above, the "low basis weight portion" is a concept including a region of the absorbent core 31 having a weight per unit area of zero. Even in the case where the "low basis weight portion 41" is a region having no absorbent core 31, the entire absorbent core 31 may be wrapped with the core wrap 32 over the low basis weight portion 41. In this case, even if the absorbent core 31 is divided into a plurality of regions, the absorbent body 30 can be integrally formed with the core cladding 32.

The low basis weight portion 41 serves as a boundary at which the rigidity of the absorber 30 changes. Therefore, the low basis weight portion 41 corresponds to a region in which the absorbent body 30 is easily deformed. The low basis weight portion 41 extends in the width direction W and is formed so that the absorbent article 1 can be bent in the thickness direction T. The low basis weight portion 41 extends from one end to the other end of the absorber 30 in the width direction W.

In the present embodiment, the low basis weight portion 41 has a curved shape in which the center in the width direction W of the low basis weight portion 41 protrudes rearward. More specifically, the center of the low basis weight portion 41 in the width direction W is located rearward of the outer edge of the low basis weight portion 41. The length of the low basis weight portion 41 in the front-rear direction L may be fixed or may not be fixed. The position in the front-rear direction of the low basis weight portion 41 of the present embodiment changes in the width direction, and the position in the front-rear direction of a line formed by connecting the centers 41CL in the front-rear direction of the low basis weight portion 41 also changes in the width direction, and takes a curved shape in which the center in the width direction W protrudes rearward. The front end edge 41F of the low basis weight portion 41 is the front end edge of the entire low basis weight portion, and is the front end edge of the low basis weight portion at the outer edge 41E of the low basis weight portion 41. The rear end edge 41R of the low basis weight portion 41 is the rear end edge of the entire low basis weight portion, and is the rear end edge of the low basis weight portion 41 at the center in the width direction W of the low basis weight portion 41.

The low basis weight portion 41 is provided on the rear side of the center in the front-rear direction L of the central region S1 (wing portion 3) and on the front side of the rear side edge of the absorbent body 30. At least a part of the low basis weight portion 41 is provided at the boundary between the central region S1 and the rear region S3. The low basis weight portion 41 may be provided in at least a part of the boundary between the central region S1 and the rear region S3, and may not be provided in the entire boundary. At least a part of the low basis weight portion 41 is provided at the rear end edge of the wing portion 3 (the front end edge of the hip flap 4) which is the narrowed portion 5 formed by narrowing the outer edges of the hip flap 4 and the wing portion inward in the width direction, or in a region extending outward in the width direction from the narrowed portion 5. The central region S1 is sandwiched by the legs of the wearer and is easily deformed by a force or the like acting from the outside in the width direction W toward the inside in the width direction. Since the low basis weight portion 41 is provided in the narrowed portion 5 or in a region extending outward in the width direction from the narrowed portion 5, the deformation of the central region S1 can be absorbed by the low basis weight portion 41, and the transmission of the deformation to the hip flaps 4 can be suppressed. This can suppress the occurrence of twisting and wrinkling of the hip flaps 4, and can suppress discomfort and leakage of excrement when worn.

At least a part of the plurality of recessed portions 4C of the hip flaps 4 is disposed in a region rearward of the rear end edge 41R of the low basis weight portion 41. Since the recessed portion 4C is disposed in the region rearward of the rear end edge 41R of the low basis weight portion 41, the deformation of the low basis weight portion 41 can be cut by the recessed portion 4C, and the deformation can be suppressed from being transmitted rearward of the recessed portion 4C, thereby suppressing the occurrence of bending or wrinkling in the entire hip flaps 4. This can suppress the occurrence of twisting and wrinkling of the hip flaps 4, and can suppress discomfort and leakage of excrement when worn.

(3) Folding of absorbent articles

The absorbent article 1 is folded up before use with the folding line FL1 as a base point. The folding line FL1 is a line for folding the absorbent article 1 so that the skin-facing surfaces thereof face each other, and the folding line FL1 is formed in this folded state. Fold line FL1 forms a habitual fold relative to the wearer that becomes a valley.

Fig. 6 is a schematic perspective view of the absorbent article 1 in an unfolded state in which the absorbent article 1 folded with the folding line as a base point is unfolded. In the absorbent article shown in fig. 6, the low basis weight portion 41 and the region overlapping with the low basis weight portion 41 are raised toward the wearer side by contraction of the elastic member 91 forming the leg hole. Fig. 7 is a schematic enlarged view of the low basis weight portion 41 shown in fig. 5. Fig. 7 (a) shows an extended state in which the absorbent article is unfolded and the elastic member 91 is extended, and fig. 7 (b) shows a contracted state in which the absorbent article is unfolded and the elastic member 91 is contracted.

The folding line FL1 is provided so that the low basis weight portion 41 is raised toward the wearer side by contraction of the elastic member 91 in the unfolded state of the absorbent article. Since the fold line is provided in the low-basis-weight portion 41 so that the low-basis-weight portion 41 bulges toward the wearer in the unfolded state, when the joining portions 60 such as the 1 st joining portion 61 and the 2 nd joining portion 62 are joined to the undergarment, the low-basis-weight portion 41 is not easily disposed between the undergarment S and the joining portion 60. Thus, the low-basis-weight portion 41 does not inhibit the joining of the undergarment S to the joining portion 60, and can suppress the joining of the joining portion 60 to a position where the joining is not intended or the failure of the joining portion 60 to bend, and the joined state by the joining portion 60 can be easily maintained. This can maintain the joint position of the absorbent article 1, and suppress discomfort and leakage of excrement when worn.

Fold line FL1 extends in width direction W. The fold line FL1 is disposed across the low basis weight portion and the absorbent core adjacent to the low basis weight portion. The folding line FL1 is separated from the center 41CL in the front-rear direction of the low area weight portion 41 in the front-rear direction. At least a part of the folding line FL1 is provided at a position not coinciding with the center 41CL in the front-rear direction of the low basis weight portion 41. At least a part of the folding line FL1 may be provided separately from the center 41CL in the front-rear direction of the low basis weight portion 41, or may partially overlap the center 41CL in the front-rear direction. A folding line FL1 and an adjacent region adjacent to the folding line in the front-rear direction L are formed in the low basis weight portion 41. As for the adjacent regions, a front side adjacent region 411 between the folding line FL1 and the absorbent core 31 located on the front side of the low unit area weight portion 41 and a rear side adjacent region 412 between the folding line FL1 and the absorbent core 31 located on the rear side of the low unit area weight portion 41 are provided.

The folding line FL1 is valley-folded with respect to the wearer, and therefore, the adjacent region adjacent to the folding line FL1 is raised toward the wearer side from the folding line FL1 in the state shown in fig. 6 and 7 (b). At least a part of the folding line FL1 does not coincide with the center 41CL in the front-rear direction of the low unit area weight portion 41, but is offset in the front-rear direction with respect to the center in the front-rear direction of the low unit area weight portion 41. In the region where the folding line FL1 is offset with respect to the center in the front-rear direction of the low basis weight section, the length in the front-rear direction L of one of the adjacent regions (the rear-side adjacent region 412 in the present embodiment) is longer than the length in the front-rear direction L of the other (the front-side adjacent region 411 in the present embodiment). The one adjacent region is more likely to bulge toward the wearer's side than the other adjacent region, because the length in the front-rear direction of the bulge in the unfolded state of the absorbent article is longer.

(4) Wearing form of absorbent article

Next, the wearing form of the absorbent article formed in this manner on the underwear S will be described. When the wearer wears the absorbent article on underwear, the absorbent article 1 in the folded state is first unfolded. As shown in fig. 6, in the expanded state, the low basis weight portion 41 is contracted in the front-rear direction L by the contraction of the elastic member 91. Next, the wearer joins the joint portion of the absorbent article in the unfolded state to the underwear. In this case, the undergarment S is separated from the body, specifically, is disposed below the crotch of the wearer. Fig. 8 is a schematic sectional view of the absorbent article in a worn state, taken along line C-C of fig. 1. Fig. 8 (a) is a state in which the absorbent article 1 in the unfolded state is joined to underwear and before the underwear is lifted. In the advanced state, the absorbent article 1 is joined to underwear by the 1 st joint section 61 and the 2 nd joint section 62, and the low basis weight section 41 between the 1 st joint section 61 and the 2 nd joint section 62 contracts in the front-rear direction L. Next, the wearer lifts the absorbent article shown in fig. 8 (a) and places the undergarment S and the absorbent article 1 around the waist of the wearer. Fig. 8 (b) shows a state where the undergarment is lifted.

When the undergarment S and the absorbent article 1 are disposed around the waist of the wearer, the undergarment S stretches so as to fit the body of the wearer. At this time, the region in which the low-basis-weight portion 41 contracts expands as the undergarment S expands, and the absorbent article 1 deforms as the undergarment deforms. The distance in the front-rear direction L of the 1 st joint 61 and the 2 nd joint 62 in the state after wearing is longer than the distance between the 1 st joint 61 and the 2 nd joint 62 in the state before wearing. The 1 st engaging part 61 and the 2 nd engaging part 62 are not easily separated from the undergarment when worn, and are easily maintained at positions fixed to the undergarment in advance. The absorbent article 1 can be prevented from being accidentally folded or displaced when worn, and uncomfortable feeling and leakage of excrement can be prevented when worn.

(5) Leakproof rib top

The absorbent article 1 has a pair of leg cuffs. The leakage preventing cuffs are standing gathers that can stand up toward the wearer. The rib mouth comprises a side sheet 12 and an elastic member 91. The inner edge 12E of the side sheet 12 is folded back outward in the width direction W along the front-rear direction L. An elastic member 91 that can expand and contract in the front-rear direction L is disposed between the folded side pieces 12. The inner edge 12E of the side sheet 12 is not joined to the front sheet 11. The inner edge 12E of the side sheet 12 and the elastic member 91 form a standing leakage preventive rib port. The absorbent article has a contracted region which can be contracted in the front-rear direction by the elastic member 91. The contracted region is a region formed by arranging the elastic member 91 in an extended state, and is a region to which a force contracting in the front-rear direction is applied by the elastic member. The contracted region is a concept other than a region formed by disposing an elastic member in a non-stretched state. The elastic member 91 of fig. 1 is shown only in the contracted region, and the region formed by disposing the elastic member in a non-stretched state is not shown. Therefore, the extent of the elastic member 91 of fig. 1 coincides with the extent of the contracted region. The contracted area is disposed across the central area S1 in the front-rear direction L.

The elastic member 91 forming the bead leakage preventing portion is disposed across the low basis weight portion 41 or across a region extending outward in the width direction from the low basis weight portion 41 in the front-rear direction L. More specifically, the front end edge 91F of the elastic member 91 is located forward of the front end edge 41F of the low basis weight portion 41, and the rear end edge 91R of the elastic member 91 is located rearward of the rear end edge 41R of the low basis weight portion 41. The region extending outward in the width direction from the low basis weight portion 41 is a region extending in the width direction from a region between the front end edge 41F of the low basis weight portion 41 and the rear end edge 41R of the low basis weight portion 41. The low basis weight portion 41 has a lower basis weight than the center of the central region in the front-rear direction, and is likely to be deformed. The basis weight of the low basis weight portion 41 is different from the basis weight of the absorbent core 31 in the central region S1 (or the rear region S3) adjacent to the low basis weight portion 41, and is a boundary of the change in stiffness. This makes it easy to deform the low basis weight portion 41 from the boundary between the absorbent cores adjacent to the low basis weight portion 41. Further, the elastic member 91 spans the low basis weight portion 41 or a region extending outward in the width direction from the low basis weight portion 41. With this configuration, the low-basis-weight portion 41 deforms so that the length in the front-rear direction becomes shorter as the elastic member 91 contracts, and the low-basis-weight portion 41 contracts in the front-rear direction. As a result, the contracted region of the low basis weight portion 41 is expanded with the expansion of the undergarment S during wearing, and the absorbent article 1 can deform following the deformation of the undergarment. The 1 st engaging part 61 and the 2 nd engaging part 62 are not easily separated from the undergarment when worn, and are easily maintained at positions fixed to the undergarment in advance. The absorbent article 1 can be prevented from being accidentally folded or displaced when worn, and uncomfortable feeling and leakage of excrement can be prevented when worn.

(6) Non-joining region between skin sheet and absorber and joining region between non-skin sheet and absorber

The skin surface sheet 10 is not joined to a member provided on the non-skin-facing surface side of the skin surface sheet 10 in a region overlapping the low basis weight portion 41. The absorbent body and the second sheet can be exemplified as the member provided on the non-skin-facing surface side of the skin-facing sheet 10. More specifically, in the non-joined region 46 shown in fig. 1, the skin sheet 10 and the core wrap 32 forming the absorber 30 are not joined. The non-bonded region 46 is illustrated in fig. 1 by the area enclosed by the dashed line. The non-joined region 46 may extend at least from one end to the other end in the width direction W of the low unit area weight portion 41. Instead, the non-joined regions 46 may not extend in the width direction W to both ends of the low basis weight portion 41. Since the skin surface sheet is not joined to the member provided on the non-skin-facing surface side of the skin surface sheet at the low basis weight portion 41, the skin surface sheet is likely to be deformed so as to bulge toward the wearer side when the low basis weight portion 41 is deformed so as to be contracted by the elastic member.

The non-skin-facing sheet 20 is joined to a member provided on the skin-facing surface side of the non-skin-facing sheet 20 in a region overlapping the low basis weight portion 41. More specifically, the non-skin facing sheet 20 and the core wrap layer forming the absorber are bonded together. Since the skin-facing surface side of the absorbent article has lower rigidity than the non-skin-facing surface side because the skin-facing surface sheet 10 and the absorbent body 30 are not joined and the non-skin-facing surface sheet 20 and the absorbent body 30 are joined together, the low basis weight portions 41 tend to bulge toward the skin-facing surface side when the low basis weight portions 41 are deformed so as to contract by the elastic member. The low basis weight portion 41 can maintain the bonded position of the absorbent article without hindering the bonding between the undergarment and the bonded portion, and can further suppress the uncomfortable feeling during wearing and the leakage of excrement.

(7) Joint part

The 1 st joint 61 is disposed forward of the 2 nd joint 62 and forward of the low basis weight portion 41. The 2 nd engaging portion 62 is disposed apart from the 1 st engaging portion 61 in the front-rear direction L. The 2 nd joining portion 62 is disposed rearward of the low basis weight portion 41. Since the 1 st joining part 61 and the 2 nd joining part 62 are disposed with the low-basis-weight part 41 interposed therebetween, when the state changes from the advanced state to the advanced state, even if the 1 st joining part 61 and the 2 nd joining part 62 are pulled so that the distance therebetween becomes longer as the undergarment elongates, the low-basis-weight part 41 elongates, and the joining of the 1 st joining part 61 and the 2 nd joining part 62 can be maintained. The No. 2 joining part located in the rear region S3 can be prevented from separating from the underwear, and the rear end edge of the absorbent article can be prevented from being bent toward the skin-facing surface side when worn, or the position of the rear region of the absorbent article can be prevented from shifting in the width direction. This can suppress discomfort and leakage of excrement when worn.

The low basis weight portion 41 is disposed in a region not overlapping the joint portion 60. With such a structure, when the low basis weight portion 41 contracts by the contraction of the elastic member 91, the joining portions 60 can be suppressed from adhering to each other. The joining of the joining portions 60 to the parts that are not positioned can be prevented, and the state in which the absorbent article 1 and the underwear S are joined by the joining portions 60 can be maintained. The absorbent article can be prevented from being accidentally folded or displaced when worn, and further, uncomfortable feeling and leakage of excrement can be prevented when worn.

At least a part of a region extending in the width direction from the low basis weight portion 41 is disposed between the 3 rd joining portion 63 and the 4 th joining portion 64. Therefore, even if the pulling is performed so that the distance between the 3 rd joined portion 63 and the 4 th joined portion 64 becomes longer as the undergarment is stretched, the low-basis-weight portion 41 is stretched, and the joining of the 3 rd joined portion 63 and the 4 th joined portion 64 can be maintained. The 3 rd joint section 63 located in the rear region of the absorbent article can be prevented from separating from the undergarment, and the hip flaps 4 can be prevented from being folded toward the skin-facing side or the positions of the hip flaps 4 can be prevented from shifting in the width direction when worn. This can suppress discomfort and leakage of excrement when worn.

The rear end edge of the 2 nd joining portion 62 is disposed rearward of a contraction region contracted in the front-rear direction by the elastic member 91. The second joining part 62 located rearward of the contracted region is less likely to contract by contraction of the elastic member 91 in the expanded state, and is likely to maintain the joined state to the underwear. When the undergarment is lifted up, the contraction region is stretched along with the deformation of the undergarment, and the joined state between the 2 nd joining part 62 located rearward of the contraction region and the undergarment is easily maintained. This can maintain the joint position of the absorbent article, and further suppress discomfort and leakage of excrement when worn.

The front end edge 63F of the 3 rd joining portion 63 and the rear end edge 63R of the 3 rd joining portion 63 are disposed rearward of the contraction region that contracts in the front-rear direction by the elastic member. The 3 rd joint part located rearward of the contracted region is less likely to contract by contraction of the elastic member in the expanded state, and is easy to maintain the joined state to the underwear. In addition, since the contracted region and the 3 rd joined portion are separated in the front-rear direction, when the contracted region is expanded along with the deformation of the undergarment, the joined state between the 3 rd joined portion and the undergarment is easily maintained. The folding back and the wrinkling of the hip flaps can be suppressed, and the uncomfortable feeling and the leakage of excrement can be further suppressed when the diaper is worn.

The 4 th joint portion 64 is separated from the low basis weight portion 41 and is disposed forward of the front end edge 41F of the low basis weight portion 41. The 4 th joint portion 64 is joined to the crotch portion of underwear in a worn state. The crotch portion of the underwear is formed of a double cloth or the like, and has higher rigidity and less tendency to stretch than the region of the underwear that contacts the buttocks. In the crotch portion of the undergarment, the 1 st joining part 61 and the 4 th joining part 64 of the absorbent article 1 are joined thereto, and the absorbent article 1 is sandwiched in the thickness direction T, and is less likely to stretch than the region of the undergarment in contact with the buttocks. That is, the region to which the 4 th joint part 64 is joined is a region that is difficult to elongate. In contrast, the region of the undergarment in contact with the buttocks is a region that is more easily stretched than the crotch of the undergarment. Since the low basis weight portion 41 is disposed rearward of the 4 th joint portion 64, the low basis weight portion 41 is likely to extend in the front-rear direction in accordance with the extension of the region of the undergarment in contact with the buttocks, and the absorbent article is more likely to deform in accordance with the deformation of the undergarment.

(8) Compression part

The absorbent article 1 has a compressed portion formed by compressing at least the absorbent core 31 in the thickness direction. The compression section includes a front side compression section 81 and a rear side compression section 82. The front side compression section 81 and the rear side compression section 82 are separated in the front-rear direction. At least a part of the front side compression part 81 and at least a part of the rear side compression part 82 are provided in a range in the front-rear direction of the contracted region of the elastic member 91. The front compression unit 81 is not disposed across the low basis weight unit 41 in the front-rear direction. The rear compression unit 82 is not provided in the low basis weight unit 41. With this configuration, the region on the front side of the low basis weight portion 41 becomes higher in rigidity by the front compression portion, and is less likely to be deformed by the contraction force of the elastic member, and the absorbent body is more likely to be maintained in a flat state. Similarly, the region on the rear side of the low basis weight portion 41 has a higher rigidity due to the rear compression portion, and is less likely to be deformed by the contraction force of the elastic member, and the absorbent body is more likely to be maintained in a flat state. Since the absorber is easily maintained in a flat state, the absorber can be brought into contact with the skin of the wearer with a smooth surface, and the occurrence of a feeling of discomfort during wearing can be suppressed. On the other hand, since the compressed portion is not formed over the entire region of the low basis weight portion 41 in the front-rear direction, the low basis weight portion 41 is easily deformed so as to contract by the contraction of the elastic member, and can be deformed so as to extend as the undergarment extends. Even in the configuration in which the contractive force of the elastic member is high and the contraction amount of the low basis weight portion 41 is large, the absorbent body can be prevented from being deformed, and a good feeling of use can be maintained. The following performance of the absorbent article to underwear can be improved.

(9) Modification example

Next, an embodiment of a modification will be described with reference to fig. 9 and 10. In the description of the embodiment of the modified example, the same reference numerals are used for the same components as those of the above-described embodiment, and the description thereof is omitted. Fig. 9 is a plan view of an absorbent article according to a modification, and fig. 10 is a back view of the absorbent article according to the modification. The absorbent article 1A of the modified example is provided with a plurality of low basis weight portions 41. The plurality of low-basis weight portions 41 are arranged at intervals in the front-rear direction. In the configuration having the plurality of low basis weight portions 41, the folding line FL1 may be provided in at least a part of the low basis weight portions, and the absorbent article 1A of the modified example is provided with the folding line FL1 in the low basis weight portion 41 located on the foremost side.

The 2 nd engaging portion 62 provided in the rear region S3 is cut in the front-rear direction L. Each 2 nd joining portion 62 is disposed in a region not overlapping with the low basis weight portion 41. The plurality of low-basis weight portions 41 are provided in the range of the contracted region of the elastic member 91, and are brought into a state of contracting by the contraction of the elastic member 91. Since the plurality of low basis weight portions 41 are provided in the range of the contracted region of the elastic member 91, the amount of contraction (length in the front-rear direction) of the low basis weight portions 41 increases, and the followability to underwear can be improved. Further, since the plurality of low basis weight portions 41 are provided, the portions contracted by the low basis weight portions 41 can be provided at a plurality of locations, the absorbent article can follow a plurality of locations of the undergarment, and the joint portion 60 is more difficult to peel off from the undergarment.

While the present invention has been described in detail with reference to the above embodiments, it is 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 as modifications and variations 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 laid-open application No. 2016-67995 filed on 3/30 2016 are incorporated herein by reference.

Industrial applicability

An absorbent article which can suppress the uncomfortable feeling when worn and can suppress the leakage of excrement can be provided.

Description of the reference numerals

1 an absorbent article; 10, a skin surface sheet; 11, a front surface sheet; 12 side pieces; 20 a non-skin patch; 30 an absorbent body; 31 an absorbent core; a 32-core cladding; 41 a low basis weight portion; 61, the 1 st joint; 62, a 2 nd joint; 63 a 3 rd joint; 64 th joint part; 81 front side compression section; 82 a rear compression section; FL1 fold line; l in the front-rear direction; the width direction of W; the thickness direction of T; s1 center region; s2 front side region; s3 rear side region.

Claims

1. An absorbent article, comprising:

a front-back direction and a width direction orthogonal to each other;

a central region disposed in the crotch of the wearer;

a rear region located on a rear side of the central region;

an absorber disposed in the central region and the rear region;

an elastic member that is stretchable in the front-rear direction;

the elastic member spans the low unit area weight portion,

the folding line is provided in the low unit area weight portion so as to cause the low unit area weight portion to bulge toward the wearer side by contraction of the elastic member in an expanded state of the absorbent article,

a rear end edge of the 2 nd joining portion is disposed at a position rearward of a contraction region contracted in the front-rear direction by the elastic member,

at least a part of the folding line is provided at a position not coinciding with the center in the front-rear direction of the low basis weight portion but offset in the front-rear direction with respect to the center in the front-rear direction of the low basis weight portion,

the fold line is a valley fold relative to the wearer.

2. An absorbent article, comprising:

a front-back direction and a width direction orthogonal to each other;

a central region disposed in the crotch of the wearer;

a rear region located on a rear side of the central region;

an absorber disposed in the central region and the rear region;

an elastic member that is stretchable in the front-rear direction;

the elastic member spans the low unit area weight portion,

said joint comprises a 3 rd joint provided in said hip flap,

the 3 rd joint part is disposed at a position rearward of a contraction region contracted in the front-rear direction by the elastic member,

the fold line is a valley fold relative to the wearer.

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

4. The absorbent article according to claim 3,

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

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

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