KR20200041807A - Absorbent article - Google Patents

Abstract

The present invention relates to an absorbent article which can prevent feces disposed on a rear surface from leaking. According to the present invention, the absorbent article (1) comprises an absorbent main body (10) and an external body (20). The external body (20) has a notch portion curved along a wearer′s leg. The absorbent article (1) has longitudinal and lateral directions intersected when being unfolded. The notch portion (20c) includes a rear notch part (20cb) placed on a rear surface with respect to the longitudinal direction, and a front notch part (20cf) placed on a front surface with respect to the longitudinal direction. The external body (20) has an elastic leg member (33) continuously extended along a partial potion (20cfp) of the front and rear notch parts (20cb, 20cf). The external body (20) does not have the elastic leg member (33) extended along the front notch part (20cf) on the front surface in the longitudinal direction with respect to the partial portion (20cfp).

Description

Absorbent article {ABSORBENT ARTICLE}

The present invention relates to absorbent articles.

Absorbent articles, such as pull-on disposable diapers, have been commonly used. As one type of pull-on disposable diaper, the so-called all-in-one pull-on disposable diaper is known, which has an absorber for absorbing feces and a sheath overlaid on the absorber. Generally, in this type of pull-on disposable diaper, cuts (leg holes) are provided around the wearer's legs on two sides of the sheath in the left and right directions, and leg elastic members are provided extending along the cuts. For example, PTL 1 discloses a pull-on disposable diaper in which elastic stretch / shrink members 1 and 2, such as elastic strings, are provided around the legs in front panel A and rear panel B.

[PTL 1] Japanese Patent Application Publication No. H4-28364

The object of the present invention is to solve at least one of the following two problems.

The first problem is that, in a normal pull-on diaper, a leg elastic member, such as an elastic string, is provided on both the front side and the rear side as in PTL 1, and when the diaper is worn, the absorbent body is moved back and forth by contraction of the leg elastic member. Is to be pulled. Here, the material in the crotch region contracts uniformly in the anteroposterior direction, and especially on the rear side, the space formed between the wearer's body (hip region) and the absorbent body may be smaller in some cases. If the space becomes smaller on the back side, all of the excreted feces cannot be accommodated in the space within the base ear, and there is a fear that feces may leak out.

The present invention has been achieved in light of the above-mentioned conventional problems, and an object of the present invention is to provide an absorbent article that prevents stool leakage on the back side.

The second problem is that, in a normal pull-on diaper, when a leg elastic member, such as an elastic string, is provided to completely surround the leg as in PTL 1, when the diaper is worn, both sides of the absorbent body contract in the left and right directions of the leg elastic member. It is contracted due to the fact that the central portion of the absorbent body in the left-right direction may protrude toward the non-skin side. In particular, in the front region, there are cases in which the crotch region of the absorbent body protrudes toward the non-skin side in a bulging manner, and the absorbent body does not fit the wearer's body and gives the wearer the impression that the size does not fit.

In such cases, bulging of the absorbent body on the front side can be prevented by omitting the leg elastic member that completely surrounds the leg. However, if the leg elastic member is omitted on the front side, the fit around the leg is lowered, a gap is easily formed between the diaper and the wearer's leg, and there is a risk of urine leaking.

The present invention has been achieved in light of the conventional problems as described above, and an aspect of the present invention provides an absorbent article capable of preventing the bulging of the absorbent body without lowering fit around the leg on the front side. will be.

A main aspect of the present invention for solving the first problem described above is an absorbent article having a longitudinal direction and a width direction crossing each other in an unfolded state of the absorbent article,

Absorbent article

     Absorbent main body, and

     The absorbent body and the exterior body arranged in the thickness direction overlapping

It includes,

The exterior body has a notched portion that curves along the wearer's leg,

Notch part

     A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and

     It includes a front notch located on the front side with respect to the center in the longitudinal direction,

The exterior body has a leg elastic member that continuously extends along a portion of the rear notch and the front notch,

On the front side in the longitudinal direction with respect to the partial portion, the exterior body does not have a leg elastic member extending along the front notch.

A main aspect of the present invention for solving the above-described second problem is an absorbent article having a longitudinal direction and a width direction crossing each other in an unfolded state of the absorbent article,

Absorbent article

     Absorbent body, and

     The absorbent body and the exterior body arranged in the thickness direction

It includes,

The exterior body has a pair of notched parts that curve along the wearer's leg,

Notch part

     A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and

     Front notch located on the front side with respect to the center in the longitudinal direction

It includes,

The exterior body is provided on the rear notch, and has a leg elastic member continuously extending along the rear notch,

In at least a portion of the front notch, the exterior body does not have a leg elastic member extending along the front notch,

In at least part of the front notch, the exterior body

     An elastic region provided with a waist elastic member and extending in the width direction, and

     Inelastic region without elastic waist

It includes,

It is an absorbent article in which an inelastic region is provided in a region located on the back side with respect to the elastic region.

Features of the present invention excluding the above will become apparent by reading the description of the present specification with reference to the accompanying drawings.

In the case of the first subject, the present invention has the advantage of making it possible to provide an absorbent article that prevents the stool from leaking on the back side.

In the case of the second subject, the present invention has the advantage of making it possible to provide an absorbent article which can prevent the bulging of the absorbent body on the front side without causing a decrease in fit around the leg.

1 is a schematic perspective view of the diaper 1 when viewed from the front side.
2 is a plan view of the diaper 1 in a stretched state when viewed from the skin side.
3 is a schematic cross-sectional view taken along AA of FIG. 2.
4A and 4B are diagrams illustrating the formation of the stool receiving space SP in the diaper 1 in the form of underpants.
5 is a schematic plan view illustrating a particular arrangement of the leg elastic member 33.
6 is a plan view of the diaper 1 in a stretched state when viewed from the skin side.
Fig. 7A is a schematic plan view of a diaper 1 in an underpants-like state when stretching in the left and right directions when viewed from the abdomen (front) side. Fig. 7B is a schematic plan view of a diaper 1 in an underpants-like state in a natural state that is no longer stretched when viewed from the abdomen (front) side.
8 is a schematic side view of the diaper 1 in its natural state when viewed from one side in the left and right directions.

At least the following will be clearly understood from the description of this specification and the accompanying drawings.

The present invention is an absorbent article having a longitudinal direction and a width direction crossing each other in a state in which the absorbent article is unfolded,

Absorbent article

     Absorbent body, and

     The absorbent body and the exterior body arranged in the thickness direction

It includes,

The exterior body has a notched portion that curves along the wearer's leg,

Notch part

     A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and

     Front notch located on the front side with respect to the center in the longitudinal direction

It includes,

The exterior body has a leg elastic member that continuously extends along a portion of the rear notch and the front notch,

On the front side in the longitudinal direction with respect to the partial portion, there is provided an absorbent article in which the exterior body does not have a leg elastic member extending along the front notch.

According to this absorbent article, when the leg elastic member extending along the rear notch is contracted, the absorbent body and the exterior body are pulled from the front side to the rear side, and their material is wrinkled in the rear region. The wrinkled material is deformed to protrude toward the non-skin side to form a stool receiving space. Therefore, it accommodates the stool on the back side, and it is possible to secure a space to prevent leakage of the stool.

In addition, the present invention is an absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,

Absorbent article

     Absorbent body, and

     The absorbent body and the exterior body arranged in the thickness direction

It includes,

The absorbent article has a leg elastic member that extends by bending from the rear waist region toward the crotch side,

The absorbent article does not have a leg elastic member that extends curved from the front waist region toward the crotch side,

An absorbent article is provided in which the leg elastic member intersects the longitudinal center position from the back side to the front side.

According to this absorbent article, the leg elastic member extends from the back side waist region to the crotch side while crossing the central position from the back side to the front side in the longitudinal direction. As the leg elastic member contracts, the absorbent body and the exterior body are pulled from the front side to the rear side, and their material is wrinkled in the rear region. The wrinkled material is deformed so as to protrude toward the non-skin side to form a stool receiving space. Therefore, it accommodates the stool on the back side, and it is possible to secure a space to prevent leakage of the stool.

In such absorbent articles,

The absorbent body has an absorbent core,

Leg elastic members

     Located in the central portion in the width direction, the central region extending along the width direction, and

     A curved region that is located toward the outside in the width direction with respect to the central region, and is curved

Have,

The contraction force of the leg elastic member in the central region is smaller than that of the leg elastic member in the curved region,

It is preferable that the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located outward in the width direction with respect to the absorbent core.

According to this absorbent article, the leg elastic member exhibits a shrinking force in the region toward the outside with respect to the absorbent core on both sides in the left-right direction. Then, a portion of the absorbent body having a relatively low stiffness (such as an upper sheet) contracts in the longitudinal direction. According to the shrinkage of the top sheet or the like, the absorbent core will be pulled toward the rear side in the longitudinal direction. Thus, the stool receiving space is more easily formed.

In such absorbent articles,

It is preferred that the leg elastic member is cut and discontinuous in at least one position in the central region.

According to this absorbent article, the transverse contraction force exerted by the leg elastic member on the central region is much smaller to prevent shrinkage of the absorbent core overlapping the leg elastic member in the central region. Thus, it is possible to achieve more desirable absorbent performance for absorbent articles.

In such absorbent articles,

Leg elastic members

     Located in the central portion in the width direction, the central region extending along the width direction, and

     A curved region that is located toward the outside in the width direction with respect to the central region, and is curved

Have,

The contraction force of the leg elastic member in the central region is smaller than that of the leg elastic member in the curved region,

It is preferable that the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located on the front side in the longitudinal direction with respect to the position where the width of the exterior body is the narrowest in the width direction.

According to this absorbent article, the leg elastic member exhibits a shrinking force over a wider range in the longitudinal direction, and the area of the exterior body on the rear side with respect to the narrowest position is generally pulled towards the rear side. Thus, the corrugated material on the back side has a larger surface area, making it possible to increase the volume of the stool receiving space formed.

 In such absorbent articles,

Leg elastic members

     Located in the central portion in the width direction, the central region extending along the width direction, and

     A curved region that is located toward the outside in the width direction with respect to the central region, and is curved

Have,

The contraction force of the leg elastic member in the central region is smaller than that of the leg elastic member in the curved region,

It is preferable that the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located on the rear side in the longitudinal direction with respect to the position where the width of the exterior body is the narrowest in the width direction.

According to this absorbent article, the leg elastic member exhibits a shrinking force over a smaller range in the longitudinal direction, and the smaller portion of the front portion of the exterior body is pulled toward the rear side. Thus, a weaker compressive force acts around the leg opening on the back side (hip region side), and a smooth surface texture can be achieved.

In such absorbent articles,

The leg elastic member is preferably given a different color from the absorbent body and the exterior body.

According to this absorbent article, the colored leg elastic member is arranged on the back side (rear side) where the stool receiving space is to be formed, making it easier to immediately recognize the front / rear side of the absorbent article. Therefore, it is possible to prevent the case of wearing the absorbent article upside down.

In such absorbent articles,

The absorbent body has an absorbent core,

It is preferred that the absorbent core comprises at least 80% superabsorbent polymer by weight percentage of the total weight of the absorbent core.

According to this absorbent article, the thickness of the absorbent core can be set thinner, and the stiffness can also be set lower. Thus, the absorbent core can be more dimensionally deformed more easily, and the stool receiving space can be formed on the back side. Thus, the excreted feces can be more easily maintained in the feces receiving space, making it possible to further prevent feces from leaking out.

In such absorbent articles,

The absorbent body has an absorbent core,

It is preferable that the absorbent core has a certain width in the width direction within a predetermined longitudinal range.

According to this absorbent article, it is easier to maintain a certain length (width) in the width direction with respect to the absorbent core, compared to the case where the absorbent core has an elliptical shape or the like. In addition, it is easier to maintain a certain width with respect to the stool receiving space to be formed by the absorbent core. This increases the volume of feces that can be maintained in the feces receiving space, and the feces become much less leaky.

In such absorbent articles,

In the longitudinal direction, the central position of the absorbent body is preferably located on the front side with respect to the central position of the exterior body.

According to this absorbent article, the absorbent body is arranged at a pre-tilt position toward the front side, so that when the absorbent body is pulled to the back side, the material of the absorbent body is wrinkled to the back side. This makes it possible to form a stool receiving space while preventing the surface area of the absorbent body from becoming insufficient on the front side. Thus, urine is easily absorbed on the front side of the absorbent article, and feces can be easily retained on the back side.

In such absorbent articles,

It is preferable that the leg elastic member has a stretching factor of 2.0 to 3.5.

According to this absorbent article, a sufficient shrinking force for pulling the absorbent body toward the back side is exhibited, and the absorbent body can be pulled from the front side toward the back side to reliably form a stool receiving space. In addition, by preventing excessive contraction force, it is possible to prevent a case in which the leg elastic member pokes the wearer's skin (hip area) and prevents wearer discomfort while wearing an absorbent article.

In such absorbent articles,

It is preferable that the number of grams of the leg elastic member per 10,000 m is 10 to 4,000 deci-tex.

According to this absorbent article, a commercially available elastic string is used as a leg elastic member, and it is also possible to reliably form a stool receiving space while reducing material cost.

In such absorbent articles,

The leg elastic member is preferably composed of 1 to 3 elastic strings.

According to this absorbent article, the leg elastic member is not easily broken during wearing of the absorbent article, and appropriate elasticity may appear around the leg opening.

In such absorbent articles,

It is preferred that the target wearer is an infant or a child.

According to this absorbent article, by optimizing the balance between the size of the stool receiving space and the compressive strength of the leg opening provided by the leg elastic member even when the absorbent article is worn on a child, it maintains a desirable fit while preventing leakage of the stool. It is possible.

In addition, the present invention is an absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,

Absorbent article

     Absorbent body, and

     The absorbent body and the exterior body arranged in the thickness direction

It includes,

The exterior body has a pair of notched parts that curve along the wearer's leg,

Notch part

     A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and

     Front notch located on the front side with respect to the center in the longitudinal direction

It includes,

The exterior body is provided on the rear notch, and has a leg elastic member continuously extending along the rear notch,

In at least a portion of the front notch, the exterior body does not have a leg elastic member extending along the front notch,

In at least part of the front notch, the exterior body

An elastic region provided with a waist elastic member and extending in the width direction, and

Inelastic region without elastic waist

Have,

An absorbent article is provided in which an inelastic region is provided in a region located on the back side with respect to the elastic region.

According to this absorbent article, a leg elastic member extending along the front notch is not provided, so that shrinkage will not occur along the front notch. Therefore, this makes it possible to prevent the problem that only the two left and right side portions of the absorbent body are contracted on the front side, and the central portion is bulging to the non-skin side. On the other hand, in an area overlapping a part of the front notch, the elastic area is provided by the use of a waist elastic member to impart elasticity to the area. This makes it possible to prevent fit deterioration around the wearer's leg on the front side. Accordingly, it is possible to provide an absorbent article that can prevent the absorbent body from bulging without causing a deterioration in fit around the wearer's leg on the front side.

In addition, the present invention is an absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,

Absorbent article

     Absorbent body, and

     The absorbent body and the exterior body arranged in the thickness direction

It includes,

The absorbent article has a leg elastic member that extends by bending from the rear waist region toward the crotch side,

The absorbent article does not have a leg elastic member that extends curved from the front waist region towards the crotch side,

On the front side of the exterior body, the exterior body

     Elastic region having elasticity along the width direction, and

     Inelastic zone with no stretch in the width direction

Have,

An absorbent article is provided in which the inelastic region is provided on the back side in the longitudinal direction with respect to the elastic region.

According to this absorbent article, the contraction force by the leg elastic member will act less on the wearer's leg on the front side, and it is possible to prevent the problem that the central portion is bulging to the non-skin side due to the contraction of the two left and right sides of the absorbent body Do. In addition, an elastic region having elasticity in the width direction is provided on a portion on the front side of the exterior body to prevent deterioration of fit around the wearer's leg on the front side. Accordingly, it is possible to provide an absorbent article that can prevent the absorbent body from bulging without sacrificing fit around the wearer's leg on the front side.

In such absorbent articles,

It is preferred that the longitudinal length of the inelastic region is longer than the longitudinal length of the elastic region.

With this absorbent article, the larger surface area of the wearer's leg can be covered by the portion of the front notch that overlaps the non-elastic region (ie, by leg folds). In other words, by covering a larger area around the wearer's leg in the crotch area, it is possible to provide greater peace of mind to the user and relieve concerns such as urine glands.

In such absorbent articles,

In the natural state, it is preferable that the width of the exterior body in the width direction is the narrowest at the boundary position in the longitudinal direction between the elastic region and the inelastic region.

According to this absorbent article, a compressed portion with a reduced width of the front notch is formed, so that there are more curvature points in the leg opening, and when wearing the absorbent article, the leg opening is more easily adapted to the curve of the wearer's body. . In addition, the exterior body is easily deformed according to the movement of the wearer's leg to improve the wearability.

In such absorbent articles,

The transverse contraction force acting per unit longitudinal length in the elastic region is greater than the transverse contraction force acting per unit longitudinal length in the region adjacent in the longitudinal direction to the front side of the elastic region and having a length equal to the longitudinal length of the elastic region. Smaller is preferred.

According to this absorbent article, the greater the transverse contraction force in the region adjacent to the front side of the elastic region (that is, in the elastic region of the waist), the easier it is to prevent movement of the exterior body around the waist of the wearer. In addition, the lateral contraction force prevents the elastic region from becoming too strong, preventing the case of the leg opening from stabbing the wearer's leg, and making it possible to realize a proper fit around the wearer's leg.

In such absorbent articles,

The absorbent article further includes a pair of side edge portions that connect the opposing surfaces of the exterior body together at each widthwise end of the exterior body,

It is preferable that the front waist elastic member continuous along the width direction on the front side of the exterior body is provided in the region between the pair of side edges.

According to this absorbent article, sufficient shrinkage force is exhibited by the waist elastic member to prevent movement of the exterior body around the wearer's waist when wearing the absorbent article. Therefore, the movement of the absorbent body is less likely to occur, and it is possible to prevent deterioration of the leakage and fit of the feces.

 In such absorbent articles,

On the rear side of the exterior body, a rear waist elastic member continuous along the width direction is provided in the region between the pair of side edges.

The contraction force per unit longitudinal length on the front side of the exterior body represented by the front waist elastic member is preferably greater than the contraction force per unit longitudinal length on the back side of the exterior body represented by the front waist elastic member.

According to this absorbent article, the amount of shrinkage of the sheath on the front side is greater than the amount of shrinkage of the sheath on the back side, and in the natural state, the waist region of the absorbent article will move forward and backward in the front-rear direction. Therefore, the leg opening is also easy to move toward the front in the front-rear direction. Therefore, even if the wearer moves the wearer's leg during walking, for example, the movement of the leg is less likely to obstruct the leg opening, so the wearability of the absorbent article is improved.

In such absorbent articles,

In the natural state, it is preferable that the side edges are inclined diagonally toward the front with respect to the vertical direction of the absorbent article.

According to this absorbent article, the leg opening provided on the crotch side of the side edge portion in the vertical direction will be moved toward the front in the front-rear direction. Thus, even if the wearer moves the wearer's leg during walking, for example, the wearability of the absorbent article is improved because the movement of the leg will less obstruct the leg opening.

In such absorbent articles,

It is preferable that the exterior body does not have a waist elastic member extending along the width direction in the rear notch portion located on the rear side with respect to the center in the longitudinal direction.

According to this absorbent article, the waist elastic member (elastic region) is not provided on the back side, thereby preventing excessive shrinkage of the exterior body and the absorbent body in the width direction, making it possible to cover a large area of the hip of the wearer. Therefore, this improves the fit on the back side.

In such absorbent articles,

The absorbent body has an absorbent core,

At least a portion of the leg elastic member overlaps the absorbent core,

It is preferable that the contraction force of the leg elastic member in the portion not overlapping the absorbent core is smaller than the contraction force of the leg elastic member in the portion not overlapping the absorbent core.

According to this absorbent article, the leg elastic member does not exhibit excessive shrinking force on the absorbent core, thereby preventing excessive shrinkage of the absorbent core in the width direction. Therefore, it maintains a wide range in which feces, such as urine, can be absorbed by the absorbent core, which makes it possible to achieve the desired absorbent performance for absorbent articles.

In such absorbent articles,

The absorbent body has an absorbent core,

It is preferred that the absorbent core comprises at least 80% superabsorbent polymer by weight percentage of the total weight of the absorbent core.

According to this absorbent article, the absorbent core is easily deformed three-dimensionally along the uneven curved surface of the wearer's body. Thus, in both the elastic and inelastic regions, the absorbent core is easily fitted to the wearer's body and can prevent the leakage of feces.

In such absorbent articles,

It is preferred that the target wearer is an infant or a child.

According to this absorbent article, by adjusting the arrangement and size of the elastic and non-elastic regions, the balance between the compressive strength of the leg opening and the fit of the absorbent body is optimized for the child and can also be worn by infants with soft skin It is possible to realize diapers for children.

First embodiment

Basic structure of diaper (1)

The following describes the basic structure of a pull-on disposable diaper 1 (hereinafter also referred to as "diaper 1") as an example of the absorbent article according to this embodiment. 1 is a schematic perspective view of the diaper 1 when viewed from the front side. 2 is a plan view of the diaper 1 in a stretched state when viewed from the skin side. 3 is a schematic cross-sectional view taken along section A-A of FIG. 2. The " stretched state " in FIG. 2 means that the product (diaper 1) is stretched to remove wrinkles, or more specifically, the component member of the diaper 1 (e.g., the absorbent body 10 and the exterior body described below) Note that the length of 20)) refers to a state that is elongated to meet or approximate the dimensions of its own member.

In the form of the underpants in Fig. 1, the diaper 1 has three directions orthogonal to each other, and has a vertical direction, a left-right direction, and a front-rear direction. Hereinafter, the two sides, the so-called one side (the upper side in FIG. 1) and the other side (the lower side in FIG. 1) in the state of the underpants in the vertical direction are also referred to as the “waist opening side” and the “crotch side”, respectively. Will be referred to, and the front side and back side in the front-rear direction will also be referred to as "front side" and "rear side", respectively.

In addition, in the unfolded state of Fig. 2, the diaper 1 has three directions orthogonal to each other and has a longitudinal direction, a width direction, and a thickness direction. In the following, one side and the other side in the longitudinal direction in the unfolded state will also be referred to as "front side" and "rear side", respectively. Note that the width direction in the unfolded state in FIG. 2 is an underpant shape in FIG. 1 and is the same direction as the left and right directions. For that reason, the width direction will also be hereinafter referred to as "left and right direction". In addition, the longitudinal direction in the unfolded state is a direction along the vertical direction in the form of underpants. Furthermore, as shown in Fig. 3, in the "thickness direction" orthogonal to the vertical direction (longitudinal direction) and the horizontal direction (width direction), the side that comes into contact with the wearer's skin is the "skin side", and the opposite side is "Non-skin side".

The diaper 1 of this embodiment has an absorbent body 10 and an exterior body 20. The absorbent body 10 and the exterior body 20 in the unfolded state in FIG. 2 are folded to a folding position that is a central position CL in the longitudinal direction (up and down direction). Thereafter, in the folded state, the pair of side edge portions 20es connect the opposing surfaces of the exterior body 20 together at two left and right ends of the exterior body 20. Therefore, a part of the exterior body 20 is connected by the side edge portions 20es to form a ring shape. Thus, the waist opening BH and the pair of leg openings LH shown in FIG. 1 are formed to form an under. The pants-like diaper 1 is obtained.

The absorbent body 10 has a function of absorbing excrement, such as urine, has a substantially rectangular shape in a plan view as shown in FIG. 2, is arranged in the center in the left-right direction, and the longitudinal direction is the up-down direction of the diaper 1 Conforms to The absorbent body 10 includes an absorbent absorbent core (absorber) 11; A core wrapping sheet 12 covering the outer circumferential surface of the absorbent core 11; Top sheet 13; And a back seat 14. In addition, leak-proof wall portions 50 are provided on both sides of the absorbent body 10 in the left and right directions.

The absorbent core 11 is obtained by molding an absorbent fiber (eg, pulp fiber) into a predetermined shape, and includes a superabsorbent polymer (so-called SAP) in a weight percentage of 80% or more therein. In this embodiment, the absorbent core 11 has an approximately rectangular shape as shown in FIG. 2. The core packaging sheet 12 is a liquid-permeable sheet member that covers the outer circumferential surface of the absorbent core 11, and may be made of a tissue paper, a non-woven sheet, or the like. It should be noted that the core packaging sheet 12 is not necessarily provided.

The upper sheet 13 is a liquid-permeable sheet member (inner layer sheet) arranged on the skin-side surface of the absorbent core 11 in its thickness direction. The upper sheet 13 comes into contact with the wearer's skin when the diaper 1 is worn. The top sheet 13 of this embodiment is composed of an air-through nonwoven sheet, a spunbond nonwoven sheet, and the like.

The back sheet 14 is a sheet member (outer layer sheet) arranged on the non-skin side of the absorbent core 11 in its thickness direction, and constitutes the outer layer of the diaper 1. In this embodiment, the back sheet 14 is an impervious and moisture-permeable sheet member arranged on the non-skin side of the absorbent body 10, and the back sheet 14 is made of a resin film or the like. The provision of the back sheet 14 prevents moisture absorbed by the absorbent body 10, such as urine from being transferred (permeated) to the wearer's clothing.

The leak-proof wall portion 50 is arranged to extend in the longitudinal direction (up and down direction of the diaper 1) on the two widthwise sides of the absorbent body 10. When the diaper 1 is worn, the leak-preventing wall portion 50 rises upward from the two width-side portions of the absorbent body 10 to prevent leakage of excrement from the diaper 1. As shown in Fig. 2, the leak-proof wall portion 50 of the present embodiment is longitudinally provided by the first leak-proof wall connections 51 and 52 provided on each longitudinal side and at the widthwise outer end. It is fixedly connected to the skin side of the absorbent body 10 by a second leak-proof wall connection 53 extending along. Further, the leak-proof wall elastic member 35, for example, an elastic string, is fixed at the widthwise inward end of the leak-proof wall portion 50 while being stretched in the longitudinal direction. When the diaper 1 is worn, due to the contraction force of the leakage preventing wall elastic member 35, the widthwise inward end of the leakage preventing wall portion 50 stands from the starting point of standing to the wearer's skin, and the starting point is the second fountain It becomes the prevention wall connection 53. Note that the first leak-proof wall connections 51 and 52 and the second leak-proof wall connection 53 can be formed using an adhesive, such as a hot melt adhesive.

The exterior body 20 has a skin-side sheet 21 and a non-skin-side sheet 22. The skin side sheet 21 is a soft sheet member composed of a spunbond nonwoven sheet, an SMS nonwoven sheet, or the like, and is provided on the skin side of the absorbent body 10. The elliptical notch portion 21h is provided in the center portion of the skin-side sheet 21 with respect to the width direction and the longitudinal direction as shown in Fig. 2, and is formed by cutting its elliptical portion. Due to the elliptical notch portion 21h, the portion of the absorbent body 10 (and the leak-proof wall portion 50) is exposed in the thickness direction on the skin side, and when the diaper 1 is worn, the feces are put on the absorbent body 10. Can be absorbed.

The non-skin-side sheet 22 is a soft sheet member composed of a spunbond non-woven sheet, an SMS non-woven sheet, or the like, and is provided to cover the non-skin side of the absorbent body 10. The two longitudinal ends of the non-skin-side sheet 22 protrude outward beyond the two longitudinal ends of the skin-side sheet 21. These projections are folded inward in the longitudinal direction and towards the skin side in the thickness direction thereof to form the folded portions 22ff and 22bf. In the diaper 1, the folds 22ff and 22bf extend along the waist opening BH and cover the longitudinal outer edge of the skin-side sheet 21. Therefore, this makes it possible to achieve a desirable texture in the waist opening BH by preventing the case where the longitudinal outer edge of the skin-side sheet 21 comes into direct contact with the wearer's skin.

The plurality of front waist elastic members 31, 31, etc., which are elastic strings, are provided at predetermined longitudinal intervals while being stretched in the width direction in a region determined on the longitudinal front side of the exterior body 20 ( 2 and 3). The contraction force exhibited by the front waist elastic member 31 imparts elasticity along the width direction (left and right direction) on the front side of the exterior body 20. Similarly, the plurality of rear waist elastic members 32, 32 ..., which are elastic strings, etc. are provided at predetermined longitudinal intervals while being stretched in the width direction in a predetermined region on the longitudinal rear side of the exterior body 20. do. The contraction force exhibited by the rear waist elastic member 32 imparts elasticity along the width direction (left and right directions) on the rear side of the exterior body 20.

In addition, as shown in Fig. 2, the pair of notch portions 20c have two longitudinal ends of the sheath 20 by cutting portions of the sheath 20 from the outside to the inside on the two widthwise sides. Is provided at The pair of notched portions 20c is a portion that forms two leg openings LH in the diaper 1 in the form of underpants, has a shape to bend around the wearer's leg, and also of the diaper 1 When worn, it is the part that forms the leg wrinkles around the wearer's leg. Hereinafter, in the unfolded state in FIG. 2, a portion of each notch portion 20c positioned on the front side with respect to the central position CL will also be referred to as the front notch portion 20cf, and the central position ( The portion located on the rear side with respect to CL) will also be referred to as the rear notch 20cb.

In the diaper 1, the leg elastic members 33, such as elastic strings, are arranged in a stretched state along each rear notch 20cb. The leg elastic member 33 starts at the rear end of the rear notch 20cb, intersects at the central position, and is longitudinally continuous in a range extending to a predetermined position on the front side with respect to the central position CL. In other words, the leg elastic member 33 is arranged to extend along the partial portion 20cfp of the front notch 20cf in the region on the front side with respect to the central position CL in the longitudinal direction.

On the other hand, the leg elastic member 33 is not arranged to extend along the front notch 20cf in the region on the front side with respect to the partial portion 20cfp of the front notch 20cf in the longitudinal direction. The reason for this will be described below.

Function of leg elastic member 33

In the diaper 1 of the present embodiment, according to the above-described structure of the leg elastic member 33, a space for receiving the stool (feces) when the diaper 1 is worn (the stool receiving space) is formed in the rear region Prevents feces on the back side, such as fecal leakage. 4A and 4B are diagrams illustrating the formation of the stool receiving space SP in the diaper 1 in the form of underpants. 4A is a schematic side view of a state before the formation of the stool receiving space SP, and FIG. 4B is a schematic side view of a state after the formation of the stool receiving space SP.

When the wearer wears the diaper 1, the absorbent body 10 (absorbent core 11) is fitted along the wearer's crotch as shown in FIG. 4A. In the state shown in FIG. 4A, a large gap is not formed between the absorbent body 10 and the wearer's body (skin), and the absorbent body 10 is in close contact with the wearer's skin. Thus, when urine is excreted on the front side (front side), urine (liquid) can be immediately absorbed by the absorbent core 11, and the leakage of urine from the diaper 1 is prevented.

However, when the stool is discharged on the back side, the stool (solid) is unlikely to be absorbed by the absorbent core 11, and thus is accumulated on the skin-side surface of the absorbent body 10. Here, when the absorbent body 10 of the diaper 1 is in close contact with the back side of the wearer's body, a space large enough to accommodate feces is not formed between the wearer's skin and the absorbent body 10. Therefore, there is a fear that feces that cannot be accommodated on the surface of the absorbent body 10 may leak out of the diaper 1.

Conversely, in the diaper 1 of this embodiment, the contracting force acts along the rear notch 20cb due to the leg elastic member 33 which is arranged to extend along the rear portion of the leg opening LH. As a result, as the leg elastic member 33 contracts, the absorbent body 10 and the exterior body 20 are pulled from the front side to the rear side at the crotch portion. Accordingly, the material forming the absorbent body 10 and the exterior body 20 is wrinkled in the rear region, and the fabric surface area is increased on the rear side to achieve a state in which the material is excessively present with respect to the surface area of the hip region of the wearer. do. The excess material on the back side is deformed to protrude toward the non-skin side to form a stool receiving space SP as shown in FIG. 4B. Therefore, this makes it possible to prevent the stool from leaking on the back side in the diaper 1.

Moreover, the elastic member corresponding to the leg elastic member 33 described above is not arranged on the front side (front notch 20cf) of the leg opening LH of the diaper 1. In other words, the elastic member exhibiting the contracting force is not provided in the majority of the front notch portion 20cf, so that the absorbent body 10 and the exterior body 20 do not receive a pulling force acting from the rear side toward the front side. Therefore, the absorbent body 10 and the exterior body 20 will be pulled from the front side toward the rear side by the leg elastic member 33 extending along the rear notch portion 20cb, and pulled toward the front side from the rear side I will not lose. This makes it easier for the material constituting the absorbent body 10 and the like to form wrinkles on the back side, thereby achieving a structure in which the stool receiving space SP is to be formed.

Further, the leg elastic member 33 of the diaper 1 is continuous from the rear notch portion 20cb to the partial portion 20cfp of the front notch portion 20cf. In other words, the leg elastic member 33 exhibits elasticity along the rear notch portion 20cb in a range extending from the rear side side edge portion 20es to the partial portion 20cfp of the front notch portion 20cf. Therefore, the partial portion 20cfp of the front notch portion 20cf will be pulled toward the rear side, and the material in the front portion of the absorbent body 10 and the exterior body 20 will form wrinkles on the rear side, and accommodate feces Space SP will be formed.

Even if the absorbent body 10 is pulled toward the rear side by the leg elastic member 33, the state of close contact between the absorbent body 10 and the wearer's skin is maintained on the front side and the problem of urine glands on the front side Note that it prevents.

5 is a schematic plan view showing a specific arrangement of the leg elastic members 33. Similar to FIG. 2, FIG. 5 shows the diaper 1 in its stretched and extended state. As shown in Fig. 5, the leg elastic member 33 extends along the rear notch 20cb from the rear side in the longitudinal direction toward the front side, and the position 33ef determined in the width direction (left and right direction) ( It is continuous to intersect the absorbent core 11 from one side to the other at the end on the front side in the longitudinal direction). Hereinafter, a part of the leg elastic member 33 extending along the width direction between the two predetermined positions 33ef in the width direction is referred to as the "center area R33ec". Note that the state in which the leg elastic member 33 extends "along the width direction" also includes a state in which the extended direction and the width direction of the leg elastic member 33 form a predetermined angle. For example, the above-described condition also extends from one side in the width direction to the other side in the width direction with the leg elastic member 33 inclined at a predetermined angle with respect to the width direction (eg, an angle less than 45 °). Examples include cases in which the inclination angle is changed in the central area R33ec. In addition, a portion of the leg elastic member 33 that is curved along the notch portion 20c and located outside in the width direction with respect to the central region R33ec is referred to as “curved region R33es”.

In the manufacturing method of the diaper 1, the formation of the leg elastic member 33 is made as follows. An elastic member (for example, an elastic string) moving back and forth in a direction orthogonal to the transport direction (ie, in the CD direction) is arranged on the exterior body 20 transported in the width direction (MD direction); At such a stage, the sheath 20 is in the form of a continuous body in which the sheath 20 is connected in the MD direction. For example, an elastic string is provided to move from one side in the CD direction to the other side in the CD direction on a continuous body of the exterior body 20 transported in the MD direction, and a predetermined position in the CD direction (predetermined position described above) (Corresponding to (33ef)), the elastic string is continuously supplied, but the movement in the CD direction is stopped, and after a predetermined time has elapsed, it moves from one side in the CD direction to one side in the CD direction. The string is supplied. As a result, a leg elastic member 33 having a shape shown in Fig. 5 is formed.

When the leg elastic member 33 is provided by the above-described method, the contractile force shown in the central region R33ec is weaker than the contractile force indicated in the curved region R33es. In other words, in the diaper 1, the magnitude of the contractile force exhibited by the leg elastic member 33 is changed at two predetermined positions 33ef. This is because when the elastic string is supplied in the above-described method, the extent to which the elastic string is stretched is different between when it is moved in the CD direction and when it is not moved in the CD direction.

 Thus, in the portion of the leg elastic member 33 where the leg elastic member 33 and the absorbent core 11 overlap in the central region R33ec between the two predetermined positions 33ef, the leg elastic member 33 is It exhibits a smaller transverse shrinkage force acting on the absorbent core 11. Therefore, this prevents the case where the absorbent core 11 is excessively contracted in the width direction (and the longitudinal direction). Thus, this makes it possible for the absorbent core 11 to maintain a wide range to absorb feces, such as urine, and to obtain the desired absorbent performance for the diaper 1.

It should be noted that the leg elastic member 33 may be cut off at one or more sites in the central region R33ec and discontinuous. In such a case, the leg elastic member 33 exhibits a smaller transverse contraction force in the central region R33ec, further preventing shrinkage of the absorbent core 11. Thus, it is possible to achieve a much more desirable absorption performance for the diaper 1.

On the other hand, in a portion of the leg elastic member 33 arranged in the curved region R33es outward in the width direction with respect to the predetermined position 33ef, the contractile force exhibited by the leg elastic member 33 is weaker. It appears along the rear notch 20cb without supporting. Hereinafter, the curved region R33es in which the leg elastic member 33 exhibits a stronger contracting force than in the central region R33ec will also be referred to as the "effective longitudinal portion" of the leg elastic member 33. Further, in the effective longitudinal portion of the leg elastic member 33, the predetermined position 33ef located at the front end in the longitudinal direction will also be referred to as "front end 33ef". In this embodiment, in the curved portion of the leg elastic member 33, the front end 33ef is the portion that is located furthest on the front side in the longitudinal direction.

In this embodiment, the front end 33ef is located outward in the width direction with respect to the absorbent core 11. In other words, the effective longitudinal portion of the leg elastic member 33 does not overlap with the absorbent core 11, and the contracting force exhibited by the leg elastic member 33 does not act directly on the absorbent core 11. Due to the absorbent core 11 formed by most SAPs as described above, it has a higher stiffness than other members (e.g., top sheet 13 and back sheet 14). In the case where the effective longitudinal portion of the leg elastic member 33 overlaps the absorbent core 11, the highly rigid absorbent core 11 is not easily contracted in the longitudinal direction, so the absorbent core 11 (absorbent body 10 )) And the material of the exterior body 20 is less likely to form wrinkles on the back side.

Conversely, in this embodiment, the contractile force exhibited by the leg elastic member 33 acts in the region on the two left and right sides of the absorbent core 11. And, in the absorbent body 10, the upper sheet 13 and the rear sheet 14 having relatively low stiffness are contracted in the longitudinal direction. Therefore, the absorbent core 11 coupled to the top sheet 13 or the like tends to be pulled toward the longitudinal rear side along the shrinkage of the top sheet 13 or the like. The material of the absorbent body 10 and the exterior body 20 is likely to form wrinkles on the back side. Therefore, the stool receiving space SP is more easily formed.

Further, the area on the left and right sides of the absorbent core 11 contracts longitudinally due to the leg elastic member 33, but the absorbent core 11 itself is less likely to contract. Specifically, the outer region of the absorbent core 11 contracts in the width direction (left-right direction) and fits around the wearer's leg, while the central portion of the absorbent core 11 does not contract in the width direction, but rather rather in FIG. 4B It is deformed to protrude toward the non-skin side as shown in. In other words, the absorbent core 11 is three-dimensionally deformed to bulge from the central region to the non-skin side in the width direction. Thus, the stool receiving space SP has a larger gap of separation from the wearer's skin in the widthwise central portion, and a smaller gap of separation from the wearer's skin in the two widthwise side portions. Therefore, this makes it possible to provide a sufficiently large volume for the stool receiving space SP while preventing side leakage of the received stool.

Note that the exterior body 20 of the diaper 1 has the narrowest width in the width direction at a predetermined position MN on the front side in the longitudinal direction with respect to the central position CL. In other words, the width of the notch corresponding to the front notch portion 20cf is widest at the position MN determined in the longitudinal direction. Due to the fact that the width of the exterior body 20 is the narrowest on the front side, the wearer can more easily move the wearer's leg on the front side when the diaper 1 is worn. For example, when the wearer is walking while wearing the diaper 1, or in a case where the wearer is an infant or the like, such movement is less likely to be disturbed when the wearer moves his leg with the face up. Note that the predetermined position (MN) is also referred to as the "narrowest position (MN)".

In this embodiment, the front end 33ef of the leg elastic member 33 is located on the front side in the longitudinal direction with respect to the narrowest position MN. In such a case, the leg elastic member 33 exhibits a contracting force over a wider range in the longitudinal direction, and the area of the sheath 20 on the rear side for the narrowest position MN is generally pulled toward the rear side. . In other words, the corrugated material on the back side has a larger surface area, making it possible to increase the volume of the stool receiving space SP formed.

It should be noted that, in the diaper 1, the front end 33ef of the leg elastic member 33 can be located on the rear side in the longitudinal direction with respect to the narrowest position MN. In such a case, the leg elastic member 33 exhibits a shrinking force over a smaller range in the longitudinal direction, and a smaller portion of the front portion of the exterior body 20 is pulled toward the rear side. Thus, the volume of the stool receiving space SP is smaller than in the case described above, but the compressive force along the leg opening LH on the back side (hip region side) is weaker, making it possible to achieve a smooth surface texture. This is beneficial for diapers for infants or babies with sensitive skin.

In addition, different colors from the absorbent body 10 and the exterior body 20 may be provided to the leg elastic member 33. In the diaper 1, the leg elastic member 33 is mainly continuous along the rear notch 20cb, and the elastic member is not arranged along the front notch 20cf. Thus, if the leg elastic member 33 is given a prominent color, such as red or blue, the leg elastic member 33 is likely to form a frame of the leg opening LH on the back side. This allows the user to more easily recognize the front / rear side of the diaper 1. In other words, when the colored leg elastic member 33 is arranged on the rear side where the stool receiving space SP is formed, the front / rear side of the diaper 1 can be immediately recognized, and the diaper 1 is worn backwards. It is possible to prevent.

In addition, the absorbent core 11 of the diaper 1 is composed of SAP with a weight percentage of 80% or more. Therefore, compared to the case of the absorbent core mainly formed from pulp or the like, the thickness can be set thinner, and the stiffness can also be set lower. Therefore, the absorbent core 11 of this embodiment can be easily deformed in three dimensions, and the three-dimensional feces receiving space SP can be formed on the back side. With such a configuration, the excreted feces are more easily maintained (accepted) within the feces receiving space SP, and it is possible to further prevent the outflow of feces to the outside.

Moreover, the absorbent core 11 has a substantially rectangular shape as shown in FIG. 5. In other words, the absorbent core 11 is formed to have a certain length (width) within a longitudinal range determined in the width direction. Therefore, it is easier to maintain a certain width with respect to the stool receiving space SP formed by the absorbent core 11, compared to the case where the absorbent core has an elliptical shape or the like. And, it is possible to increase the volume of feces that can be maintained therein. Therefore, feces are much less likely to leak.

Further, in the diaper 1, the absorbent body 10 is arranged inclined toward the front side in the longitudinal direction. In other words, in the longitudinal direction, the absorbent body 10 is arranged such that the central position of the absorbent body 10 is on the front side with respect to the central position CL of the diaper 1. When the absorbent body 10 is inclined to the front side in advance, when the absorbent body 10 is pulled to the back side, the material of the absorbent body 10 is wrinkled on the back side. This makes it possible to form a large stool receiving space SP while preventing the surface area of the absorbent body 10 from becoming insufficient on the front side. Thus, urine can be easily absorbed on the diaper 1, and feces can be easily retained (accepted) on the back side.

In addition, with respect to the contractile force exhibited by the leg elastic member 33 to pull the absorbent body 10 and the exterior body 20 from the front side toward the rear side, the leg elastic member 33 is contracted when the diaper 1 is worn It is arranged so as to reliably form the stool receiving space SP on this rear side. Specifically, the leg elastic member 33 of the present embodiment has 1 to 3 (3 in the example in FIG. 5) having a stretch factor of 2.0 to 3.5, each having a desix-dtex of 10 to 4,000. It includes an elastic string. "Elongation factor" indicates the degree of stretching for natural length 1 in the case of an elastic member (elastic string), for example, in the case where the stretching factor is 1.2, it is noted that the elastic member is stretched by a factor of 0.2 from the natural length. do.

When the stretching factor of the leg elastic member 33 is smaller than 2.0, it is impossible to obtain a sufficient contraction force to pull the absorbent body 10 toward the rear side, and it is difficult to reliably form the stool receiving space SP. However, when the stretching factor of the leg elastic member 33 is greater than 3.5, the contraction force becomes excessive, and when the diaper 1 is worn, the elastic member 33 pokes the wearer's skin (hip area), and the wearer feels uncomfortable. Easy to feel In this embodiment, the stretching factor of the leg elastic member 33 is set within the range of 2.0 to 3.5 to prevent the wearer from feeling discomfort while wearing the diaper 1, while the absorbent body 10 is rearward from the front side. It is possible to reliably pull toward the side and to form a stool receiving space SP reliably.

In addition, by providing a plurality of (three in FIG. 5) elastic strings as the leg elastic member 33, it is possible to prevent the leg elastic member 33 from being damaged when the diaper 1 is worn, and also the leg opening LH It is also possible to show proper elasticity along). In particular, the elastic string extending along the leg opening LH (rear notch 20cb) is opened by opening the leg opening LH to wear the diaper 1 or when the diaper 1 is worn. It is easier to break when the opening LH is subjected to a significant amount of force due to the movement of the wearer's leg. In this regard, the arrangement of the plurality of elastic strings provides sufficient contraction force to the leg elastic member 33, and also makes it possible to prevent its breakage.

In addition, in the case of using an elastic string having 10 to 4,000 deci-dtex (grams per 10,000 m) as the leg elastic member 33, commercially available Lycra (registered trademark) or the like is used. It is possible to do. The use of a commercially available elastic string makes it possible to reliably form the stool receiving space SP while reducing material cost.

Second embodiment

Basic structure of diaper (1)

6 is a plan view of the diaper 1 in a stretched state when viewed from the skin side. The basic structure of the diaper 1 in the second embodiment is almost the same as the diaper 1 in the first embodiment.

In the second embodiment, the exterior body 20 is provided with a leg elastic member 33 that is an elastic string or the like in a continuous and elongated manner along the rear notch 20cb. Therefore, the elasticity appears along the leg opening LH in the rear region of the exterior body 20. However, the elastic member corresponding to the leg elastic member 33 is not arranged in at least a part of the front region of the exterior body 20. In other words, the leg elastic member 33 extending along the front notch portion 20cf is not provided in at least a part of the front notch portion 20cf, and elasticity does not appear along the leg opening LH in this portion.

In Fig. 6, a portion of the leg elastic member 33 is arranged on the front side with respect to the longitudinal center position CL. Specifically, the portion of the leg elastic member 33 is provided extending along the front notch 20cf in the vicinity of the longitudinal center position CL. It should be noted that the leg elastic member 33 can be arranged only on the rear side with respect to the longitudinal center position CL. In other words, a structure in which the leg elastic member 33 extending along the front notch portion 20cf is not provided in any region of the front notch portion 20cf is possible.

In addition, with respect to the longitudinal direction, at least a portion of each front notch portion 20cf is a plurality of waist elastic members 34, 34 ... (elastic strings) at longitudinal intervals determined in a state in which they are stretched in the width direction. Is provided. In FIG. 6, the waist elastic members 34, 34 ... are edged toward the longitudinal rear side by the region overlapping with the longitudinal front end of the front notch 20cf (i.e., the predetermined length Lr1). (Areas extending from the rear end of the portion 20es). Hereinafter, the region provided with the waist elastic member 34 will be referred to as the elastic region R1.

Further, the elastic member corresponding to the waist elastic member 34 is not provided in the area existing on the rear side in the longitudinal direction with respect to the elastic area R1. Hereinafter, a region located on the rear side with respect to the elastic region R1 and the waist elastic member 34 is not provided will be referred to as an inelastic region R2.

Note that in the rear region of the exterior body 20, the region overlapping with the rear notch 20cb in the longitudinal direction extends in the width direction and an elastic member corresponding to the waist elastic member 34 is not provided. In other words, the elastic region corresponding to the elastic region R1 is not provided on the back side of the diaper 1.

Elastic area (R1)

In the diaper 1 of this embodiment, the elastic member (leg elastic member 33) extending along the leg opening LH is mainly provided only on the rear side, and not on the front side. In other words, the contractile force exerted by the leg elastic member 33 on both sides of the diaper 1 in the left and right directions does not act in most of the regions extending along the front notch 20cf. Therefore, it is possible to prevent the problem that the two left and right side portions of the absorbent body 10 contract and the central portion between them becomes bulging toward the non-skin side.

However, when the contractile force does not act along the front notch 20cf, a gap is easily formed between the wearer's leg and the front notch 20cf (leg fold) on the front side, so that urine leaks around the leg and leaks around the leg. There is a fear of deteriorating the fit.

In this regard, in this embodiment, the waist elastic members 34 extending in the lateral direction are arranged in a region overlapping with the front end of the front notch in the longitudinal direction, and a portion of each front notch 20cf (front end) In the elastic region (R1) to form, and give elasticity to such a region. This makes it possible to prevent deterioration of fit around the leg on the front side.

Fig. 7A is a schematic plan view of a diaper 1 in an underpants-like state when stretching in the left and right directions when viewed from the abdomen (front) side. Fig. 7B is a schematic plan view of the diaper 1 in an underpants-like state when in a natural state that is no longer stretched when viewed from the abdomen (front) side. It should be noted that the "natural state" is the state in which the diaper 1 remains itself for a predetermined time. For example, the exterior body 20 of the diaper 1 is pulled outwards on both sides in the left and right directions to leave the exterior body 20 in the “stretched state”, and after maintaining the stretched state for 15 seconds, the pulling is stopped. The diaper 1 is placed on a flat surface, for example a table. A state that has passed 5 minutes on a flat surface is considered natural.

When the diaper 1 is stretched in the left-right direction, the shape of the front notch 20cf extends toward the crotch in the vertical direction, as shown in FIG. 7A, so that the width of the diaper 1 is reduced in the left-right direction. It is a curved shape that is curved. And, it can be understood that the leg opening LH is formed around the wearer's leg. When stretching is stopped and the diaper 1 returns to the natural state, the partial region of the exterior body 20 on the front side of the diaper 1 is contracted by the front waist elastic member 31 and the waist elastic member 34. Due to the contraction in the left and right direction. Specifically, as shown in FIG. 7B, the region of the exterior body 20 sandwiched in the left and right directions between the two side edge portions 20es is contracted, and the elastic region R1 is also contracted. On the other hand, the inelastic region R2 hardly contracts in the left and right directions.

 Thus, in the elastic region R1, the exterior body 20 is deformed around the wearer's waist, and the front notch 20cf is fitted around the wearer's leg to improve the fit around the wearer's leg. do.

In addition, in the inelastic region R2 adjacent to the elastic region R1 on the crotch side in the vertical direction, the contractile force exhibited by the leg elastic member 33 or the contractile force exhibited by the waist elastic member 34 is the exterior body 20 and The absorbent body 10 is not easily acted on the absorbent body 10 so that the absorbent body 10 is deformed to prevent bulging from the crotch portion. In addition, the front notch portion 20cf forms a leg wrinkle that spreads outward in a frill manner in the left and right directions as shown in FIG. 7B, and a large area of the wearer's leg is covered by soft leg wrinkles in an area adjacent to the crotch. All. Therefore, the user of the diaper 1 (the wearer of the diaper 1 or the person wearing the diaper 1 to another person) can receive a neat impression due to the prevention of the bulging of the absorbent body 10 in the crotch portion, and also The comfort of the mind is also provided by the wearer's legs, which are reliably covered by leg folds.

In that way, in the diaper 1 of the present embodiment, due to the provision of the elastic region R1 and the inelastic region R2, the fit around the wearer's leg is improved, and the absorbent body 10 also has a crotch region. It is also possible to prevent bulging from the non-skin side.

6, the length Lr2 of the inelastic region R2 in the longitudinal direction (up and down direction) of the diaper 1 is longer than the length Lr1 of the elastic region R1 (Lr2> Lr1). ). Therefore, when the diaper 1 is worn, a larger surface area of the wearer's leg may be covered by leg folds formed in the inelastic region R2 of the front notch 20cf. By covering a larger area around the legs in the crotch area, it is possible to give the user greater peace of mind and relieve concerns such as urine glands.

In addition, as shown in FIG. 7B, in the diaper 1 in its natural state, the length (width) W20 in the width direction (left and right direction) of the exterior body 20 has elastic regions R1 and inelastic regions R2. ) Is shorter at the boundary (Br) in the longitudinal direction (up and down). In other words, the exterior body 20 is the narrowest in the width direction at the position of the crotch side end of the elastic region R1 in the longitudinal direction. Due to the front notch 20cf of the exterior body 20 formed in such a narrow shape, more curvature points exist in the leg opening LH, and the leg opening LH is worn by the wearer's body when the diaper 1 is worn ( Leg) to fit more easily. In addition, the exterior body 20 of the diaper 1 is easily deformed according to the movement of the wearer's leg to improve the wearability.

In addition, in FIG. 6, as the waist elastic region R3, a region adjacent to the front side of the elastic region R1 in the longitudinal direction and the longitudinal length Lr3 equals the longitudinal length Lr1 of the elastic region ( The waist opening side) is defined in the vertical direction. In the diaper 1, the transverse contraction force acting per unit longitudinal length in the elastic region R1 is smaller than the transverse contraction force acting on the unit longitudinal length in the waist elastic region R3. The waist elastic region R3 is the region in the lower waist portion sandwiched between the side edges 20es on the two widthwise sides, and provides fit in the lower waist portion of the wearer when the diaper 1 is worn. , It is a part having the function of fixing the exterior body 20 to the wearer's body so as not to move in the position. Therefore, it is preferable that the contraction force in the width direction acts with sufficient strength in the waist elastic region R3.

However, the elastic region R1 is a portion having a function of allowing the portion of the exterior body 20 to fit the wearer's leg as described above. So, when the contraction force acting in the width direction is too large in the area, there is a fear that the wearer feels uncomfortable due to, for example, a leg opening LH that pierces the wearer's leg. In this regard, in the diaper 1, the lateral contraction force in the elastic region R1 is set to be smaller than the lateral contraction force in the waist elastic region R3, while allowing an appropriate fit around the wearer's leg. Prevent the movement of the exterior body 20 from the wearer's waist.

The front waist elastic member 31 arranged on the front side of the exterior body 20 along the width direction within the area sandwiched between the side edges 20es on the two widthwise sides of the exterior body 20 It should be noted that it is continuous. In other words, on the front side of the diaper 1, the front waist elastic member 31 exhibits a shrinking force over the entire width direction range between the two widthwise ends of the exterior body 20 without being broken. Therefore, in the region where the front waist elastic member 31 is arranged (including the waist elastic region R3), a sufficient contraction force acts around the waist, and when the diaper 1 is worn, the outer body 20 of the outer body 20 around the wearer's waist is worn. It is possible to prevent position movement. Therefore, this prevents the movement of the absorbent body 10 and the like, and makes it possible to prevent the dropping of the waste and the fit.

Further, in the diaper 1, an elastic region corresponding to the front elastic region R1 is not provided on the rear side of the exterior body 20. In other words, the exterior body 20 does not have an elastic member corresponding to the waist elastic member 34 in the rear notch 20cb. When the diaper 1 is worn, the rear area of the exterior body 20 is a portion covering the wearer's buttocks, so it is desirable to have a surface area as wide as possible. When the elastic region corresponding to the elastic region R1 is provided on the rear side, the exterior body 20 and the absorbent body 10 easily contract in the width direction in the elastic region. In such a case, there is a fear that the hip of the wearer protrudes from the exterior body 20 and the absorbent body 10, and the leg opening LH may poke the bulging portion of the wearer's hip. Conversely, in the diaper 1 of the present embodiment, since the elastic region is not provided on the back side, it prevents the contraction of the sheath 20 and the absorbent body 10 in the width direction so that a large part of the hip of the wearer is prevented. It is possible to cover. Thus, the wearer is less likely to feel discomfort on the back side, which makes it possible to improve the fit.

8 is a schematic side view of a diaper 1 in its natural state when viewed from one side (right) in the left and right directions. In the diaper 1 of the present embodiment, in the region between the side edges 20es provided on the two widthwise sides, the contraction force per unit longitudinal length exhibited by the front waist elastic member 31 is the back waist elastic member It is greater than the contractile force per unit longitudinal length indicated by (32). For that reason, in the diaper 1 in its natural state, the amount of contraction in the left-right direction of the exterior body 20 on the front side is larger than the amount of contraction in the left-right direction of the exterior body 20 on the back side. As shown in Fig. 8, the waist region of the diaper 1 (the region where the waist elastic members 31 and 32 are provided) is inclined toward the front in the front-rear direction. In other words, the side edge portions 20es provided on the two left and right sides of the exterior body 20 are inclined in the front diagonal direction with respect to the vertical direction.

Due to the two side edge portions 20es inclined in the front diagonal direction, the leg opening LH provided on the crotch side of the side edge portions 20es in the vertical direction can also be easily moved toward the front in the front-rear direction. . In other words, the center position of the leg opening LH in the front-rear direction is closer to the front side than the rear side. Even if the wearer moves the leg forward (front side) while wearing the diaper 1, the leg opening LH is less likely to interfere with the wearer's leg. For example, even when the wearer moves his leg while walking, the leg movement is less disturbed and the wearability is improved.

In addition, as shown in FIG. 6, in the diaper 1, a portion of the leg elastic member 33 extending along each rear notch portion 20cb is a portion overlapping the absorbent core 11 in the widthwise central portion. Have The contraction force of the leg elastic member 33 at the portion not overlapping the absorbent core 11 is smaller than the contraction force of the leg elastic member 33 at the portion not overlapping the absorbent core 11. In other words, the leg elastic member 33 does not exhibit a large amount of shrinking force on the absorbent core 11, thereby preventing excessive shrinkage of the absorbent core 11 in the width direction (and in the longitudinal direction). Therefore, this makes it possible for the absorbent core 11 to maintain a wide range to absorb feces, such as urine, and to obtain the desired absorbent performance for the diaper 1.

Further, when the absorbent core 11 of the diaper 1 is composed of 80% or more by weight of SAP, the thickness can be set thinner than in the case of the absorbent core mainly formed from pulp or the like, and the stiffness is also more Can be set low. Therefore, the absorbent core 11 of this embodiment is easily deformed three-dimensionally along the uneven curved surface of the wearer's body. Therefore, in both the elastic region R1 and the non-elastic region R2, the absorbent core 11 can be easily fitted to the wearer's body to prevent the leakage of feces.

Other embodiments

Although embodiments of the present disclosure have been described above, the above embodiments of the present disclosure are merely to aid understanding of the present disclosure and should not be construed as limiting the present disclosure in any way. The present disclosure can be variously modified or modified without departing from its subject matter, and includes equivalents thereof. For example, modifications described below are also possible.

The intended wearer of the diaper 1 is not limited to adults, but may be an infant (from birth to 12 months) or a child (from 1 year to kindergarten). In other words, the diaper 1 may be a diaper for children. In such a case, as described with reference to Fig. 5, by changing the longitudinal position of the front end 33ef of the leg elastic member 33, it acts along the leg opening LH (rear notch 20cb). It is possible to control the amount of shrinkage force. Accordingly, the balance between the size of the stool receiving space SP provided by the leg elastic member 33 and the compressive strength of the leg opening LH makes it possible to provide an optimized diaper for children. This makes it possible to maintain a desirable fit while preventing stool leakage.

In addition, by adjusting the arrangement and size of the elastic region R1 and the inelastic region R2, the balance between the compressive strength of the leg opening LH and the fit of the absorbent body 10 allows the child's diaper optimized for the child. It is possible to provide. For example, it is possible to provide diapers that can be worn by infants with soft skin.

1: Diapers (Pull-on disposable diapers, absorbent articles)
10: absorbent body
11: absorbent core
12: Core packing sheet
13: upper seat
14: rear seat
20: exterior
20c: Notch part
20cf: front notch
20cfp: partial site
20cb: rear notch
20es: side edge
21: skin side sheet
21h: oval notch
22: non-skin side sheet
22ff: folded part
22bf: folded part
31: front waist elastic member
32: rear waist elastic member
33: leg elastic member
33ef: front end (predetermined position)
34: waist elastic member
35: Leak-proof wall elastic member
50: Leak-proof wall part
BH: waist opening
LH: leg opening
CL: Central position
MN: narrowest position
SP: stool accommodation space
R1: Elastic area
R2: Inelastic domain
R3: waist elastic area

Claims (26)

An absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,
Absorbent article
Absorbent main body, and
The absorbent body and the exterior body arranged in the thickness direction overlapping
It includes,
The exterior body has a notched portion that curves along the wearer's leg,
Notch part
A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and
Front notch located on the front side with respect to the center in the longitudinal direction
It includes,
The exterior body has a leg elastic member that continuously extends along a portion of the rear notch and the front notch,
On the front side in the longitudinal direction with respect to the partial portion, the absorbent article does not have a leg elastic member extending along the front notch. An absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,
Absorbent article
Absorbent body, and
The absorbent body and the exterior body arranged in the thickness direction
It includes,
The absorbent article has a leg elastic member that extends by bending from the rear waist region toward the crotch side,
The absorbent article does not have a leg elastic member that extends curved from the front waist region towards the crotch side,
The absorbent article wherein the leg elastic member intersects the longitudinal center position from the back side to the front side. The method according to claim 1 or 2,
The absorbent body has an absorbent core,
Leg elastic members
Located in the central portion in the width direction, the central region extending along the width direction, and
A curved region that is located toward the outside in the width direction with respect to the central region, and is curved
Have,
The contraction force of the leg elastic member in the central region is less than that of the leg elastic member in the curved region,
An absorbent article wherein the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located outward in the width direction with respect to the absorbent core. 4. The absorbent article of claim 3, wherein the leg elastic member is cut and discontinuous at one or more locations in the central region. The method according to claim 1 or 2,
Leg elastic members
Located in the central portion in the width direction, the central region extending along the width direction, and
A curved region that is located toward the outside in the width direction with respect to the central region, and is curved
Have,
The contraction force of the leg elastic member in the central region is less than that of the leg elastic member in the curved region,
An absorbent article in which the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located on the front side in the longitudinal direction with respect to the position where the width of the exterior body is narrowest in the width direction. The method according to claim 1 or 2,
Leg elastic members
Located in the central portion in the width direction, the central region extending along the width direction, and
A curved region that is located toward the outside in the width direction with respect to the central region, and is curved
Have,
The contraction force of the leg elastic member in the central region is less than that of the leg elastic member in the curved region,
An absorbent article in which the end of the leg elastic member on the front side in the longitudinal direction in the curved region is located on the rear side in the longitudinal direction with respect to the position where the width of the exterior body is narrowest in the width direction. The absorbent article according to claim 1 or 2, wherein the leg elastic member is given a different color from the absorbent body and the exterior body. The method according to claim 1 or 2,
The absorbent body has an absorbent core,
An absorbent article, wherein the absorbent core comprises at least 80% superabsorbent polymer by weight percentage of the total weight of the absorbent core. The method according to claim 1 or 2,
The absorbent body has an absorbent core,
An absorbent article wherein the absorbent core has a certain width in the width direction within a predetermined longitudinal range. The absorbent article according to claim 1 or 2, wherein in the longitudinal direction, the central position of the absorbent body is located on the front side with respect to the central position of the sheath. The absorbent article according to claim 1 or 2, wherein the leg elastic member has a stretching factor of 2.0 to 3.5. The absorbent article according to claim 11, wherein the number of grams of the leg elastic member per 10,000 m is 10 to 4,000 deci-tex. 12. The absorbent article of claim 11, wherein the leg elastic member is comprised of 1 to 3 elastic strings. The absorbent article according to claim 1 or 2, wherein the target wearer is an infant or a child. An absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,
Absorbent article
Absorbent body, and
The absorbent body and the exterior body arranged in the thickness direction
It includes,
The exterior body has a pair of notched parts that curve along the wearer's leg,
Notch part
A rear notch portion located on the rear side with respect to the center in the longitudinal direction, and
Front notch located on the front side with respect to the center in the longitudinal direction
It includes,
The exterior body is provided on the rear notch, and has a leg elastic member continuously extending along the rear notch,
In at least a portion of the front notch, the exterior body does not have a leg elastic member extending along the front notch,
In at least part of the front notch, the exterior body
An elastic region provided with a waist elastic member and extending in the width direction, and
Inelastic region without elastic waist
Have,
An absorbent article wherein the non-elastic region is provided in the region located on the back side with respect to the elastic region. An absorbent article having a longitudinal direction and a width direction crossing each other in an expanded state of the absorbent article,
Absorbent article
Absorbent body, and
The absorbent body and the exterior body arranged in the thickness direction
It includes,
The absorbent article has a leg elastic member that extends by bending from the rear waist region toward the crotch side,
The absorbent article does not have a leg elastic member that extends curved from the front waist region towards the crotch side,
On the front side of the exterior body, the exterior body
Elastic region having elasticity along the width direction, and
Inelastic zone with no stretch in the width direction
Have,
An absorbent article wherein the inelastic region is provided on the back side in the longitudinal direction with respect to the elastic region. The absorbent article according to claim 15 or 16, wherein the longitudinal length of the non-elastic region is longer than the longitudinal length of the elastic region. 17. The absorbent article according to claim 15 or 16, wherein in the natural state, the width of the sheath in the width direction is the narrowest at the boundary position in the longitudinal direction between the elastic region and the inelastic region. 17. The unit according to claim 15 or 16, wherein the transverse contraction force acting per unit longitudinal length in the elastic region is longitudinally adjacent to the front side of the elastic region and the length is equal to the longitudinal length of the elastic region. An absorbent article that is smaller than the transverse shrinkage force acting per longitudinal length. The method of claim 15 or 16,
The absorbent article further includes a pair of side edge portions that connect the opposite surfaces of the exterior body together at each widthwise end of the exterior body,
On the front side of the exterior body, an absorbent article in which a front waist elastic member continuous along the width direction is provided in an area between a pair of side edges. The method of claim 20,
On the rear side of the exterior body, a rear waist elastic member continuous along the width direction is provided in the region between the pair of side edges.
The absorbent article wherein the contraction force per unit longitudinal length on the front side of the exterior body exhibited by the front waist elastic member is greater than the contraction force per unit longitudinal length on the back side of the exterior body exhibited by the front waist elastic member. 21. The absorbent article according to claim 20, wherein, in a natural state, the side edge portion is inclined in the diagonal direction forward with respect to the vertical direction of the absorbent article. The absorbent article according to claim 15 or 16, wherein the exterior body does not have a waist elastic member extending along the width direction in the rear notch portion located on the rear side with respect to the center in the longitudinal direction. The method of claim 15 or 16,
The absorbent body has an absorbent core,
At least a portion of the leg elastic member overlaps the absorbent core,
The absorbent article wherein the contractile force of the leg elastic member at the portion overlapping with the absorbent core is smaller than the contractile force of the leg elastic member at portions not overlapping with the absorbent core. The method of claim 15 or 16,
The absorbent body has an absorbent core,
An absorbent article, wherein the absorbent core comprises at least 80% superabsorbent polymer by weight percentage of the total weight of the absorbent core. 17. The absorbent article of claim 15 or 16, wherein the target wearer is an infant or a child.

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