WO2024014005A1

WO2024014005A1 - Absorbent article

Info

Publication number: WO2024014005A1
Application number: PCT/JP2022/028210
Authority: WO
Inventors: 健人梨子木; 沙也佳櫻井; 洋介新保; 健島津; 雄大石井
Original assignee: ユニ・チャーム株式会社
Priority date: 2022-07-15
Filing date: 2022-07-20
Publication date: 2024-01-18
Also published as: JP7196351B1; JP2024011907A

Abstract

An absorbent article (1) is equipped with an absorber (10). The absorber (10) has a central deformation induction part (21S). The absorber (10) has a pair of deformation induction regions (60). In each of the deformation induction regions (60), end regions (60et) located on the end side in the width direction of the absorber (10) within the deformation induction region (60) are located longitudinally inward of central regions (60ct) arranged on the central side in the width direction. The deformation induction region (60) has elastic members (55, 57) that do not overlap the longitudinal center line of the absorbent article (1), that are provided at both ends in the width direction and in the longitudinal central portion of the absorbent article (1), and that stretch and contract longitudinally.

Description

absorbent articles

The present invention relates to absorbent articles.

Conventionally, absorbent articles equipped with an absorbent body that absorbs excretory fluids such as urine and menstrual blood have improved leak-proofing properties and fit by deforming the absorbent body into a predetermined shape by bending, etc. when worn. Techniques for achieving this are known. For example, Patent Document 1 discloses that the absorber has a recess on the back sheet side surface, a pair of grooves on the top sheet side surface of the absorber, and when worn, the lower absorbent layer of the absorber An absorbent article is disclosed in which the upper absorbent layer is bent into a substantially V-shape about the groove as an axis, and the upper absorbent layer deforms into a shape that protrudes in a curved shape toward the wearer's skin. Further, for example, Patent Document 2 discloses that an elastic member is provided that extends in the vertical direction and is disposed in the horizontal center of the absorbent body arrangement area and between the absorbent body and the outermost sheet. An absorbent article has been disclosed in which, due to contraction, a portion of the absorbent body that overlaps with an elastic region where an elastic member is present in a plan view deforms so as to follow the intergluteal cleft of the wearer.

Patent No. 4459013 JP2020-103884A

As mentioned above, absorbent articles that improve fit by deforming the absorbent body when worn are known, but when using such absorbent articles that absorb excretory fluids such as urine and menstrual blood, If the amount of excretion by the user increases, or if the amount of excretion by the user is already large, it may be possible to change the product to one with increased thickness or a larger size in order to improve the absorption capacity. However, when thicker or larger products are used, they become deformed to fit the shape of the user's body and are difficult to fit properly, resulting in gaps between the product and the user's body, which prevents leakage. It may be induced.

In this regard, in the absorbent article of Patent Document 1, the absorber can be deformed into a so-called W-shape when worn, but when the thickness of the absorber is increased or the size of the product itself is increased, If the W-shaped deformation becomes difficult, there is a possibility that a gap will be created between the body and the body, which may reduce the fit with the body and cause leakage. Further, in the absorbent article of Patent Document 2, since the absorbent body is contracted and deformed by an elastic member extending in the vertical direction provided in the horizontal center portion, and the absorbent body is deformed, similarly, when the thickness of the absorbent body increases, There is a possibility that the absorbent body becomes difficult to contract, making it difficult to realize deformation that follows the wearer's buttock cleft. In other words, even in thicker products or absorbent articles of large size, there is a need for a product that is less likely to create a gap between the body and the absorbent article and that can fully exhibit its absorbent performance.

The present invention has been made in view of the above-mentioned problems, and its purpose is to bring the absorbent body into close contact with the wearer's body over a wide area along the shape of the wearer's body, so that the wearer's body and absorbent article can come into close contact with each other. It is an object of the present invention to provide an absorbent article that can prevent gaps from forming between the absorbent articles and suppress leakage.

The main invention for achieving the above object is an absorbent article including a liquid-absorbing absorbent body having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in an unfolded state, the absorbent article having a liquid-absorbing property. , a central deformation guide portion extending in the longitudinal direction and serving as a deformation starting point is provided at a central portion in both the longitudinal direction and the width direction, and the absorbent body is arranged in the width direction from the end side in the width direction. a pair of deformation inducing regions inclined toward the center side, the deformation inducing region being an end region located on the end side in the width direction of the absorbent body among the deformation inducing regions; is located inside the center area in the longitudinal direction from the center area on the center side in the width direction, and the deformation inducing area is arranged so as not to overlap with the center line in the longitudinal direction of the absorbent article. The absorbent article is characterized in that an elastic member that expands and contracts in the longitudinal direction is provided at both ends of the absorbent article in the width direction and at least in a central portion in the longitudinal direction.
Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, an absorbent article is provided in which an absorbent body is brought into close contact with a wide surface along the shape of a wearer's body, thereby making it difficult to create a gap between the wearer's body and the absorbent article, and suppressing leakage. can be provided.

FIG. 1A is a schematic plan view showing the pants-type disposable diaper 101 separated at the joint between the front body 101a and the back body 101b and developed on a plane, and FIG. 1B is a sectional view taken along line AA in FIG. 1A. It is. FIG. 2 is a schematic perspective view showing how the urine absorbing pad 1 is replaced. FIG. 2 is a schematic plan view of the urine absorbing pad 1 in the unfolded and extended state in the first embodiment, viewed from the skin side. 4A is a sectional view taken along line AA in FIG. 3, FIG. 4B is a sectional view taken along line BB in FIG. 3, and FIG. 4C is a sectional view taken along line CC in FIG. FIG. 2 is a schematic plan view of the urine absorbing pad 1 in an expanded and stretched state, viewed from the non-skin side. FIG. 2 is a schematic diagram illustrating a state in which the absorber 10 is deformed. FIG. 3 is a diagram illustrating a state in which the unfolded urine absorbing pad 1 is placed on a horizontal surface under predetermined conditions. FIG. 2 is a schematic plan view of a part of the urine absorbing pad 1 in an expanded and stretched state, viewed from the skin side. It is a schematic perspective view of the diaper 200 in a 2nd embodiment. FIG. 2 is a plan view of the diaper 200 in an expanded and stretched state. 11 is a schematic cross-sectional view taken along line CC in FIG. 10. FIG. 12A is a plan view of the absorbent main body 210, and FIG. 12B is a schematic cross-sectional view taken along line DD in FIG. 12A. FIG. 3 is a partially enlarged view of the absorbent main body 210 illustrating the arrangement of the front deformation guide portion 280. This is a modification of the diaper 200.

From the description of this specification and the attached drawings, at least the following matters will become clear.
Aspect 1 is an absorbent article including a liquid-absorbing absorbent body having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in the unfolded state, wherein the absorbent body has a longitudinal direction, a width direction, and a thickness direction that intersect with each other. The absorbent body has a central deformation guide portion extending in the longitudinal direction and serving as a deformation starting point in a central portion in both directions, and the absorbent body is inclined from the end side in the width direction toward the center side in the width direction. a pair of deformation inducing regions provided as a deformation inducing region, wherein an end region of the deformation inducing region located on the end side in the width direction of the absorbent body is located at the center in the width direction. The deformation inducing region is located on the inner side in the longitudinal direction than the central region of the absorbent article, and the deformation guiding region is arranged so as not to overlap with the center line in the longitudinal direction of the absorbent article. The absorbent article is characterized in that an elastic member that expands and contracts in the longitudinal direction is provided at both ends in the width direction and at least in the central portion in the longitudinal direction.

According to the absorbent article as in Aspect 1, when the absorbent article is worn, the central deformation inducing portion and the deformation inducing region cause the absorbent body to have a large convex shape on the skin side in the central region corresponding to the crotch region. A dome-shaped ridge is formed. The raised portion allows the absorbent body to be brought into close contact over a wide area along the shape of the wearer's body, making it difficult to form a gap between the wearer's body and the absorbent article, thereby suppressing leakage.

Aspect 2 is that the absorbent body has an absorbent core, and the absorbent core has a constricted portion between both ends in the longitudinal direction, the width of which is narrower in the width direction than both ends, The absorbent article according to aspect 1, wherein at least a portion of the deformation guiding region and the constricted portion overlap in the longitudinal direction.

According to the absorbent article as in Aspect 2, the deformation inducing region becomes a stiffness changing portion in the longitudinal direction, and the deformation inducing region defines the end portion in the longitudinal direction where the absorbent core deforms convexly toward the skin. In the width direction that intersects with the longitudinal direction, the absorbent core is easily deformed in the width direction due to the constricted portion. Due to the effects of both the deformation inducing region and the constricted portion, it becomes easier to form a three-dimensional raised portion (dome shape).

Aspect 3 is the absorbent article according to aspect 2, wherein the central region of the deformation guiding region is provided in a region where the constriction exists in the longitudinal direction.

According to the absorbent article as in Aspect 3, the entire deformation guiding region is disposed within the region of the constriction in the longitudinal direction. The constricted portion is easily deformed because there is little absorbent core, and the entire deformation-inducing region is present in the constricted portion, making the absorbent body more likely to bulge.

Aspect 4 is the absorbent according to any one of Aspects 1 to 3, wherein at least one end in the longitudinal direction of the central deformation inducing portion has a portion that overlaps with the deformation inducing region in the longitudinal direction. It is an article.

According to the absorbent article as in Aspect 4, the range in which the portion corresponding to the crest of the raised part that is convex toward the skin is formed is sufficiently long, and the formation of a firmly raised raised part can be promoted.

Aspect 5 is based on aspect 1, wherein the longitudinal end of the central deformation inducing section is located inside in the longitudinal direction from the longitudinal outer end of the central region of the deformation inducing regions. The absorbent article according to any one of aspects 4.

According to the absorbent article as in Aspect 5, if the central deformation inducing portion is provided to the outer side in the longitudinal direction than the deformation inducing region, deformation to form a dome-like raised portion becomes difficult. By locating the central deformation guide portion on the inner side, it is possible to promote upheaval deformation.

Aspect 6 is the absorbent article according to any one of aspects 1 to 4, wherein the end region of the deformation guiding region is provided in a region where the elastic member is present in the longitudinal direction. .

According to the absorbent article as in aspect 6, since the end region of the deformation guiding region is within the range of the stretchable member, the absorbent body is easily deformed using the deformation guiding region as a deformation starting point due to contraction of the stretchable member.

Aspect 7 has a pair of leakage prevention walls on both sides of the width direction of the absorbent body, and the elastic member is fixed in an extended state in the longitudinal direction, and is provided on the pair of leakage prevention walls. and the leak-proof wall elastic member is contractible in the longitudinal direction, and after the absorbent article is folded in half so that the skin-side surface of the absorbent article is on the outside, the absorbent article is expanded again; When the absorbent article is placed on a horizontal surface with the non-skin side surface facing down, the height from the horizontal surface to the highest point of the leak-proof wall elastic member is the height from the horizontal surface to the absorbent material. The absorbent article according to any one of aspects 1 to 6, wherein the body height is lower than the height to the highest point.

According to the absorbent article as in Aspect 7, the leak-proof wall elastic member is prevented from coming into contact with the body in advance, and the raised portion is likely to come into close contact with the body. Therefore, a gap is less likely to be formed between the absorbent body and the body, and leakage can be suppressed.

Aspect 8 is the absorbent article according to any one of Aspects 1 to 7, wherein no other contraction element that contracts along the longitudinal direction is provided inside the elastic member in the width direction. .

According to the absorbent article according to aspect 8, the center part is made to easily bulge due to contraction of the elastic member, but since there is no contraction element that contracts the center part in the width direction, the contraction force is applied to the center part. The central part can maintain many degrees of freedom in deformation. Therefore, when the absorbent body absorbs liquid and swells, deformation of the absorbent body is easily tolerated. If there is a contraction element in the center, the degree of freedom of deformation of the absorbent body is reduced, swelling of the absorbent body appears in a convex shape on the skin-side surface, and there is a possibility that the fit may be impaired.

Aspect 9 is the absorbent article according to any one of Aspects 1 to 8, wherein the central deformation guiding portion is formed by a low basis weight portion that is lower than the basis weight of the area adjacent from the outside in the width direction. be.

According to the absorbent article as in Aspect 9, urine can be quickly diffused into the absorbent body, reducing accumulation of liquid on the surface of the absorbent body and suppressing leakage.

In aspect 10, the absorbent body includes a first absorbent body and a second absorbent body provided on the non-skin side in the thickness direction from the first absorbent body, and the low basis weight portion is The absorbent article according to aspect 9, wherein the absorbent article is provided in at least the first absorbent body.

According to the absorbent article as in aspect 10, urine can be quickly diffused into the absorbent body, reducing liquid accumulation on the surface of the absorbent body and suppressing leakage.

In aspect 11, the absorbent body has a pair of liquid diffusion guide portions extending along the longitudinal direction on both sides of the width direction, and the deformation guide region The length in the longitudinal direction from the inner end to the outer end in the longitudinal direction is a first length, and the deformation guiding region extends outward in the longitudinal direction by the first length from the outer end in the longitudinal direction. When a certain position is defined as a reference position, and a region from the inner end in the longitudinal direction of the deformation guiding region to the reference position in the longitudinal direction is defined as a predetermined region, Each inner end is the absorbent article according to any one of aspects 1 to 10, which is disposed within the predetermined region.

According to the absorbent article as in aspect 11, the inner ends in the longitudinal direction of the pair of liquid diffusion guides are arranged within the predetermined region, compared to the case where the inner ends in the longitudinal direction of the pair of liquid diffusion guides are not arranged within the predetermined region. If it is arranged within the area, it will be easier to guide the liquid that collects around the trough of the formed ridge to the front and back of the absorber. This allows efficient absorption using the entire surface of the absorber.

Aspect 12 is the absorbent article according to any one of Aspects 1 to 11, wherein the pair of deformation guiding regions have longitudinal ends in the central region spaced apart in the width direction.

According to the absorbent article as in aspect 12, the liquid absorbed in the central part of the absorbent body is guided from the spaced apart parts of the pair of deformation inducing regions to the ventral side and the dorsal side in the longitudinal direction, so that the liquid is absorbed in the entire absorbent body. It is possible to prevent liquid from accumulating in the troughs of the ridges. This allows efficient absorption using the entire surface of the absorber.

Aspect 13 is the absorbent article according to any one of Aspects 1 to 12, wherein the pair of deformation inducing regions are provided on both one side and the other side in the longitudinal direction, respectively.

According to the absorbent article as in aspect 13, the deformation inducing regions are provided on both one side and the other side (front side and rear side) in the longitudinal direction, so that one large dome protrudes toward the skin in the central area. This makes it easier to form a raised portion that has a shape.

Aspect 14 is the absorbent article according to any one of Aspects 1 to 13, which has a design that is visible from the skin side of the absorbent article at least at the center in the longitudinal direction and the width direction.

According to the absorbent article such as Aspect 14, the design is applied to the central portion, so that the central portion is visually emphasized during use. The central position is a portion that bulges toward the skin during use, and by emphasizing the bulge, it is possible to give the user an image of a good fit and improved safety against leakage.

Aspect 15 is the aspect 1, wherein in the unfolded and stretched state, the elastic member is a non-skin-side elastic member that is disposed on the non-skin side of the absorbent body than the skin-side surface of the absorbent body in the thickness direction. It is an absorbent article.

According to the absorbent article as in aspect 15, the non-skin side stretchable member (leg gathers) can further promote contraction of the absorbent article in the longitudinal direction, making it easier to form a dome-shaped raised portion of the absorbent body. Become.

Aspect 16 is that the absorbent body has an absorbent core, and the absorbent core has a constricted portion between both ends in the longitudinal direction, the width of which is narrower in the width direction than both ends, The length of the constriction in the longitudinal direction is longer than the length of the non-skin-side elastic member in the longitudinal direction, and in the longitudinal direction, the non-skin-side elastic member is in a region where the constriction is provided. The absorbent article according to aspect 15, wherein the absorbent article is provided with:

According to the absorbent article such as Aspect 16, the absorbent core has a wide width and high rigidity in the portions that are not constricted portions. In comparison, the stiffness of the constriction is lower, and the presence of the entire area of the non-skin side stretchable member (leg gathers) within the longitudinal range of the constriction makes it easier for the absorbent body to contract in the longitudinal direction. Therefore, it becomes easier to form a raised portion (dome shape), and leakage can be suppressed.

Aspect 17 is the absorbent article according to aspect 16, wherein the outer end of the non-skin side elastic member in the width direction does not overlap with the absorbent core in plan view.

According to the absorbent article as in Aspect 17, by contracting the portion where the absorbent core is not present, it becomes easier to contract in the longitudinal direction, and it becomes easier to form the protrusions of the absorbent body.

In aspect 18, the absorbent body has an absorbent core, and when the longitudinal direction is the front-back direction, the front side in the front-back direction corresponds to the ventral side of the wearer, and the rear side in the front-back direction is A pair of front deformation guide portions are provided in the width direction, corresponding to the back side of the wearer, on the front side of the center position in the front-rear direction, for guiding the absorbent core to deform in the thickness direction. , the absorbent article according to any one of aspects 1 to 17, wherein each of the pair of front deformation guide portions has a front slope portion that slopes from the front side to the rear side in the front-back direction and from the outside to the inside in the width direction. It is.

According to the absorbent article as in aspect 18, the outer absorbent core of the front deformation guide part is moved over the upper part of the inner absorbent core (skin side ) can be transformed to look like this. Leakage can be suppressed by placing the absorbent core in close contact with the gap in the groin area where leakage is likely to occur.

In aspect 19, each of the pair of front deformation guide portions has an inclination start point where the inclination starts, and an inclination end point located on the rear side of the inclination start point and where the inclination ends; A straight line connecting the inclination start point and the inclination end point on one side of the front inclined portion of The absorbent article according to aspect 18 intersects.

According to the absorbent article according to aspect 19, the force that induces deformation applied to the front inclined portion is easily transmitted to the deformation inducing region, and the absorbent body is deformed in a convex shape toward the skin surface starting from the deformation inducing region. It becomes easier to do so. Thereby, the absorber can be brought into close contact with the absorbent body and leakage can be suppressed.

In aspect 20, the absorbent body has an absorbent core, and the absorbent core has a constricted portion between both ends in the longitudinal direction, the width of which is narrower in the width direction than both ends, The absorbent article according to aspect 18 or 19, wherein the front deformation guide portion and the constriction portion overlap in the longitudinal direction.

According to the absorbent article according to aspect 20, the constriction is a place that easily comes into contact with the wearer's legs, and by providing the front deformation inducing section along the constriction, the absorbent core outside the front deformation inducing section It is easy to transform the material so that it is located above the inner absorbent core (skin side). This makes it possible to suppress leakage by bringing the absorbent core into close contact with the gap in the groin area where leakage is likely to occur.

Aspect 21 is the aspect 18, wherein the absorbent body has a front central deformation inducing part along the front-rear direction and serving as a deformation starting point between the pair of front deformation inducing parts in the width direction; 19. The absorbent article according to item 19.

According to the absorbent article as in aspect 21, while deforming the outer absorbent body of the front deformation guiding part so as to be on the upper part (skin surface side) of the inner absorbent body, the front central deformation guiding part is deformed into a downwardly convex shape. By deforming it to the non-skin side, it is possible to create a space on the front side while keeping the absorbent body in close contact with the gap in the groin area where leakage is likely to occur. This space functions as a space for temporarily storing urine, and can suppress leakage from the groin area.

===First embodiment===
As an absorbent article according to a first embodiment of the present invention, a urine absorbing pad 1 will be described as an example. The urine absorbing pad 1 is used by being attached to a pants-type disposable diaper 101, for example. FIG. 1A is a schematic plan view showing the pants-type disposable diaper 101 separated at the joint between the front body 101a and the back body 101b and developed on a plane, and FIG. 1B is a sectional view taken along line AA in FIG. 1A. It is.

As shown in FIGS. 1A and 1B, the disposable diaper 101 has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to each other, and includes an absorbent body 110 containing a liquid absorbent material such as pulp fiber, and an absorbent body 110 that includes a liquid absorbent material such as pulp fiber. It has a liquid-permeable top sheet 130 that covers the absorbent body 110 from the skin side in the thickness direction, and a liquid-impermeable back sheet 140 that covers the absorbent body 110 from the non-skin side. Further, the unfolded shape of the diaper 101 has a substantially hourglass shape having a longitudinal direction, a width direction, and a thickness direction, as shown in FIG. 1A. That is, the central portion 101m in the longitudinal direction is narrowed in the width direction.

Here, the constricted part 101m is the crotch area 101m that is applied to the wearer's crotch, and the ventral part 101a in the longitudinal direction of the crotch area 101m is the front body area that is applied to the wearer's lower abdomen. 101a, and a portion 101b on the back side in the longitudinal direction from the crotch portion 101m is a back body portion 101b that is applied to the wearer's buttocks. When the unfolded diaper 101 is folded in half at the center position CL101 in the longitudinal direction, each widthwise end 101ae2, 101ae2 of the front body 101a, each widthwise end 101be2 of the back body 101b, 101be2 are joined by welding or adhesion, respectively, to form one waist opening and two leg openings, resulting in a pants-shaped disposable diaper 101.
The diaper 101 is worn by the wearer like pants.

FIG. 2 is a schematic perspective view showing how the urine absorbing pad 1 is replaced. The pad 1 is replaced, for example, with the wearer standing or sitting on a chair as shown in FIG. 2, with the diaper 101 lowered to below the knees. That is, with the diaper 101 in a lowered state, first, a used urine absorbing pad (not shown) attached to the skin side of the topsheet 130 of the diaper 101 is removed from the diaper 101. Then, the new urine absorbing pad 1 prepared in advance is attached to the diaper 101. At this point, the new urine absorbing pad 1 is usually folded at the center position CL1 in the longitudinal direction as shown in FIG. It is folded. Therefore, when attaching it to the diaper 101, first put the urine absorbing pad 1 into the diaper 101 so that the same fold position CL1 is at the top, and then place the urine absorbing pad 1 into the diaper 101 so that the same fold position CL1 is placed on the top sheet 130 of the diaper 101. Lightly press it against the side of your skin. Next, the urine absorbing pad 1 in the bifold state is opened on both sides in the longitudinal direction, thereby unfolding the same pad 1 into a flat shape. Fix it on the side of the skin. Note that such fixing is accomplished, for example, by engaging male members 81, 81 (FIG. 5) of hook-and-loop fasteners provided in advance on the non-skin side of the urine absorbing pad 1 with the top sheet 130 of the diaper 101. Then, by pulling up the diaper 101 to the waist level of the wearer, the replacement of the urine absorbing pad 1 is completed.

FIG. 3 is a schematic plan view of the urine absorbing pad 1 in the unfolded and extended state in the first embodiment, viewed from the skin side. 4A is a sectional view taken along line AA in FIG. 3, FIG. 4B is a sectional view taken along line BB in FIG. 3, and FIG. 4C is a sectional view taken along line CC in FIG. FIG. 5 is a schematic plan view of the urine absorbing pad 1 in the unfolded and stretched state, viewed from the non-skin side.

As shown in FIG. 3, the urine absorbing pad 1 has three directions that are perpendicular to each other: a longitudinal direction, a width direction, and a thickness direction. The planar shape defined by the longitudinal direction and the width direction of the urine absorbing pad 1 is approximately rectangular as an example of a vertically elongated shape. However, the shape is not limited to this, and for example, it may have a substantially hourglass shape.

Note that, in the thickness direction, the side that contacts the user's body is also referred to as the "skin side", and the side that contacts the diaper 101 is also referred to as the "non-skin side". Further, the longitudinal direction is also referred to as the "front-back direction", and the width direction is also referred to as the "left-right direction". Note that when worn on the user, the front side in the longitudinal direction of the urine absorbing pad 1 faces the user's ventral side, and the rear side faces the user's back side. Further, the lengthwise dimension of the urine absorbing pad 1 is longer than the widthwise dimension, and the widthwise dimension is longer than the thicknesswise dimension.

Note that the unfolded state of the urine absorbing pad 1 refers to a state in which the urine absorbing pad 1 is unfolded on a flat surface by opening the urine absorbing pad 1 in its longitudinal direction. In addition, the "stretched state" of the urine absorbing pad 1 refers to a state in which the entire urine absorbing pad 1 (the entire product) is stretched without wrinkles, specifically, each member constituting the urine absorbing pad 1 (for example, The dimensions of the elastic members (leakage prevention wall

elastic members

55, 55, non-skin side elastic members 57, etc.) match or are close to the dimensions of the member itself (i.e., the dimensions in a state where the elastic properties of the elastic member are not expressed). It refers to the state in which it is stretched until it becomes.

<About the basic structure of urine absorbing pad 1>
As shown in FIGS. 3, 4A to 4C, and FIG. 5, the urine absorbing pad 1 includes a liquid-absorbent absorbent body 10 that absorbs urine, and a liquid-permeable absorbent body 10 that covers the absorbent body 10 from the skin side in the thickness direction. A top sheet 30, a liquid-impermeable back sheet 40 that covers the absorbent body 10 from the non-skin side, and leakage

prevention wall portions

52, 52 are formed at each widthwise end portion 30e2, 30e2 of the top sheet 30. It has

side sheets

50, 50 for.

In this embodiment, the absorbent body 10 has a two-layer structure, upper and lower layers in the thickness direction. That is, it has a first absorbent core 11 provided on the skin side in the thickness direction, and a second absorbent core 21 provided adjacent to the first absorbent core 11 on the non-skin side in the thickness direction. . Note that this two-layer structure absorber 10 will be described later.

The top sheet 30 receives excreted urine, quickly sucks it in the thickness direction, and guides it to the absorbent body 10. As shown in FIGS. 3 and 4A to 4C, for example, a planar sheet that can cover most of the skin side of the absorbent body 10 is used, and here a substantially rectangular sheet is used. The material of the top sheet 30 is, for example, a nonwoven fabric such as an air-through nonwoven fabric or a spunbond nonwoven fabric, and the constituent fibers of the nonwoven fabric are, for example, thermoplastic resin fibers such as polyethylene or polyethylene terephthalate. However, sheets made of other materials may be used as long as they have a certain degree of liquid permeability and flexibility.

The back sheet 40 is a leak-proof sheet that prevents urine from leaking from the non-skin side of the urine absorbing pad 1. As shown in FIG. 5, the back sheet 40 has a substantially rectangular planar shape, and for example, the outer peripheral edge of the sheet 40 protrudes outward from the absorbent body 10 in the longitudinal direction. The central portion protrudes outward from the absorbent body 10 in the width direction.
Note that the outer peripheral edge of the sheet 40 may protrude outward from the absorber 10 over the entire circumference. Then, as shown in FIG. 4C, with the absorbent body 10 placed on this back sheet 40, each edge portion 40ee2, 40ee2 in the width direction of the sheet 40 wraps around toward the skin side in the thickness direction. As a result, each edge portion 40ee2, 40ee2 of the sheet 40 covers each edge portion 30ee2, 30ee2 in the width direction of the top sheet 30 from the skin side. As the material for the back sheet 40, a resin film such as a polyethylene film can be used, but a sheet made of other materials may be used as long as it has a certain degree of liquid impermeability and flexibility.

As shown in FIGS. 4A and 4B, the side sheet 50 is a sheet in which leak-

proof wall portions

52, 52 are formed at each widthwise end portion 30e2, 30e2 of the top sheet 30, respectively. The leakage prevention wall portion 52 prevents urine from leaking from the width direction of the urine absorbing pad 1. As shown in FIGS. 3, 4A, and 4B, the side sheet 50 extends across both the widthwise end 30e2 of the topsheet 30 and the widthwise end 40e2 of the backsheet 40. While covering 30e2 and 40e2, they are bonded and fixed to the top sheet 30 and back sheet 40 at the same end portions 30e2 and 40e2, respectively, with an adhesive (not shown). Further, a portion 50b of the side sheet 50 fixed to the end portion 30e2 of the topsheet 30 serves as a base portion 50b of the leakage prevention wall portion 52. That is, a portion of the side sheet 50 that is closer to the center in the width direction than the base portion 50b is a free end portion 50f that can stand up from the topsheet 30, and the free end portion 50f has a portion that shrinks in the longitudinal direction. A possible leak-proof wall elastic member 55 (corresponding to an elastic member) is fixed with an adhesive in a stretched state in the longitudinal direction. As the leakage prevention wall elastic member 55, a rubber thread or the like can be exemplified.

Due to the contraction of the leakage prevention wall elastic member 55 in the longitudinal direction, the urine absorption pad 1 is curved in the longitudinal direction so that the surface sheet 30 side becomes the inner peripheral side as a whole. The free end portion 50f contracts in the longitudinal direction due to the contractile force applied from the wall elastic member 55 and stands up from the top sheet 30, so that the free end portion 50f functions as the leakage prevention wall portion 52.

Examples of the material for the side sheet 50 include SMS nonwoven fabric that has been treated to be water repellent. However, the sheet is not limited to this, and sheets made of other materials may be used as long as they have some degree of flexibility.

<About the absorber 10>
As shown in FIGS. 3 to 5, the urine absorbing pad 1 has an absorbent body 10 with a two-layer structure.
That is, the absorbent body 10 includes a first absorbent body 11 containing a liquid-absorbing material such as pulp fiber, and a second absorbent body 21 also containing a liquid-absorbing material such as pulp fiber. As shown in FIG. 3, FIG. 4A, and FIG. 4B, the first absorbent core 11 and the second absorbent core 21 extend in the longitudinal direction and are deformed in the center portions in both the longitudinal direction and the width direction, respectively. It has a central deformation guide portion 10S that serves as a starting point. More specifically, the central deformation guide section 10S is configured by a central deformation guide section 11S of the first absorbent body 11 and a central deformation guide section 21S of the second absorbent body 21, which will be described later. In this embodiment, the central deformation guide portion 10S is formed by a low basis weight portion 10S that is lower in basis weight (g/m ² ) of the liquid absorbent material in the area adjacent from the outside in the width direction. Here, the low basis weight portion 10S is defined as a portion with zero basis weight, that is, a space, but is not limited thereto. Moreover, it is preferable that the low basis weight part 10S is formed at a position corresponding to the urination point when the urine absorbing pad 1 is attached. The central deformation guiding part 10S (low basis weight part 10S) can quickly diffuse urine into the interior of the absorbent body 10, reducing the accumulation of liquid on the surface of the absorbent body 10 and suppressing leakage. can. Note that the central deformation guide portion 10S is not limited to being formed by a low basis weight portion, and may be a pressed portion (pressed groove) formed by embossing or the like, for example. Details of the deformation of the absorbent body 10 prompted by the central deformation guide portion 10S will be described later.

Hereinafter, the first absorbent body 11 and the second absorbent body 21 of the two-layer absorbent body 10 will be explained in detail. The first absorbent body 11 has a first absorbent core 13 formed by molding a liquid absorbent material into a predetermined shape. An example of the first absorbent core 13 is one obtained by mixing liquid absorbent fibers as a liquid absorbent material and liquid absorbent granules and molding the mixture into a predetermined shape. Here, pulp fibers are used as the liquid-absorbing fibers, and superabsorbent polymers (so-called SAP) are used as the liquid-absorbing granules, but the present invention is not limited thereto. Further, the liquid-absorbing material may contain only one of liquid-absorbing fibers and liquid-absorbing granules, or in addition to or in place of either of the above two types of liquid-absorbing materials. , different types of liquid absorbent materials may be mixed.

As shown in FIG. 3, the first absorbent core 13 is formed by laminating the above liquid absorbent materials in the thickness direction so that the core 13 has a substantially hourglass shape in plan view. There is. That is, the first absorbent core 13 has a constricted portion 13c between both ends in the longitudinal direction, which is narrower in the width direction than both ends. The constricted portion 13c has a portion where the width in the width direction is the narrowest at the center portion of the core 13 in the longitudinal direction.

Further, the first absorbent core 13 has the above-described central deformation guide portion 11S in the central portion.
As described above, in this example, since the basis weight of the central deformation inducing part 11S formed by the low basis weight part is zero, the central deformation inducing part 11S has the first absorption in the thickness direction. It penetrates the sexual core 13.

As shown in FIG. 3, the shape of the central deformation guiding portion 11S when viewed from the thickness direction is a vertically elongated shape in which the length in the longitudinal direction is larger than the dimension in the width direction. Specifically, as an example of a vertically elongated shape, the central deformation guide portion 11S of the present embodiment has an oval shape along the longitudinal direction and a substantially hourglass shape with a constricted central portion in the longitudinal direction.

Further, as shown in FIG. 3, in the present embodiment, the longitudinal range from the front side constriction start position 13cp of the constriction part 13c of the first absorbent core 13 to the rear side constriction start position 13cn is defined as "the constriction part 13c". The central deformation guide portion 11S is provided in the region where the constricted portion 13c exists in the longitudinal direction.

Further, as shown in FIGS. 4A to 4C, the first absorbent core 13 is covered with a core wrap sheet 15 made of, for example, tissue paper, in order to suppress collapse of the core 13 and maintain its outer shape. has been done. For example, in the present embodiment, the core wrap sheet 15 is wrapped in the width direction to wrap the entire outer peripheral surface of the first absorbent core 13, and the seams of the core wrap sheet 15 are It is located on the non-skin side of the core 13. However, it is not limited to this. For example, the core wrap sheet 15 may be wrapped in the longitudinal direction to cover the entire outer circumferential surface of the first absorbent core 13, or the seam may be located on the skin side of the first absorbent core 13. Also good. Furthermore, the core wrap sheet 15 is not limited to tissue paper, and may be a sheet having some degree of liquid permeability and flexibility.

Further, the core wrap sheet 15 and the first absorbent core 13 are bonded to each other at least in part with an adhesive such as a hot melt adhesive. For example, it is preferable that the core wrap sheet 15 is bonded to the skin side of the first absorbent core 13 using an adhesive, and also to the non-skin side of the first absorbent core 13 using an adhesive. As a result, the first absorbent core 13 easily transmits stress to the second absorbent core 21 via the core wrap sheet 15, and the width of the central deformation inducing portion 11S of the first absorbent core 11 is increased. It is possible to suppress misalignment of the portions 11cs located on both sides in the thickness direction with respect to each other.

The second absorbent body 21 shown in FIGS. 4A to 4C also has a second absorbent core 23 formed from the same liquid absorbent material as described above. As shown in FIG. 3, the second absorbent core 23 is formed by laminating the liquid absorbent materials described above in the thickness direction so that the shape of the second absorbent core 23 in plan view is vertically elongated and approximately hourglass-shaped. has been done. That is, the second absorbent core 23 has a constricted portion 23c between both ends in the longitudinal direction, which is narrower in the width direction than both ends. The constricted portion 23c has a portion where the width in the width direction is the narrowest at the center portion of the core 23 in the longitudinal direction.

Here, desirably, when comparing widthwise dimensions at the same longitudinal position, the widthwise dimension of the second absorbent core 23 is larger than the widthwise dimension of the first absorbent core 13. It is better if it is smaller or the same value. For example, in the present embodiment, the widthwise dimension of the second absorbent core 23 is smaller than the minimum value of the widthwise dimension of the central portion of the first absorbent core 13 in the longitudinal direction. Therefore, in the central portion in the longitudinal direction, the second absorbent core 23 is less likely to protrude to both sides in the width direction than the first absorbent core 13. By doing so, each of the outer ends 23ee, 23ee in the width direction of the second absorbent core 23 shown in FIG. It is possible to effectively prevent the user from feeling uncomfortable.

Further, the second absorbent core 23 has the aforementioned central deformation guide portion 21S in the central portion in both the longitudinal direction and the width direction. As described above, in this example, since the basis weight of the central deformation inducing portion 21S formed by the low basis weight portion is zero, the central deformation inducing portion 21S is The second absorbent core 23 is penetrated through the second absorbent core 23 .

As shown in FIG. 3, the shape of the central deformation guiding portion 21S when viewed from the thickness direction is a vertically elongated shape in which the length in the longitudinal direction is larger than the dimension in the width direction. Specifically, as an example of a vertically elongated shape, the central deformation guide portion 21S of this embodiment has an oval shape along the longitudinal direction.

Further, as shown in FIG. 3, in this embodiment, the range in the longitudinal direction from the front side constriction start position 23cp of the constriction part 23c of the second absorbent core 23 to the rear side constriction start position 23cn is defined as "the constriction part 23c". The central deformation guiding portion 21S is provided in the region where the constricted portion 23c exists in the longitudinal direction.

Further, the widthwise dimension of the central deformation guiding part 21S shown in FIGS. 3, 4A, and 4B is smaller than the widthwise dimension of the central deformation guiding part 11S at the same longitudinal position. Therefore, the second absorbent body 21 can be reliably spanned over the respective portions 11cs, 11cs located on both sides of the central deformation guide portion 11S in the width direction of the first absorbent body 11, and as a result, the respective portions 11cs, 11cs are It is possible to suppress misalignment between the 11cs in the thickness direction.

In addition, as shown in FIGS. 4A to 4C, the second absorbent core 23 is also covered with a core wrap sheet 25 made of tissue paper or the like in order to suppress collapse of the core 23 and maintain its outer shape. Covered. For example, in the present embodiment, the core wrap sheet 25 is wrapped in the width direction to cover the entire outer peripheral surface of the second absorbent core 23, and the seams of the core wrap sheet 25 are It is located on the skin side of the core 23. However, it is not limited to this. For example, by wrapping the core wrap sheet 25 in the longitudinal direction, the entire outer peripheral surface of the second absorbent core 23 may be wrapped, or the joint may be located on the non-skin side of the second absorbent core 23. It's okay. Furthermore, the core wrap sheet 25 is not limited to tissue paper, and may be a sheet having some degree of liquid permeability and flexibility.

Furthermore, the core wrap sheet 25 and the second absorbent core 23 are bonded to each other at least in part with an adhesive such as a hot melt adhesive. For example, it is preferable that the core wrap sheet 25 is bonded to the skin side of the second absorbent core 23 with an adhesive, and also to the non-skin side of the second absorbent core 23 with an adhesive.

By the way, as mentioned above, the first absorbent core 11 is one in which the first absorbent core 13 is covered with a core wrap sheet 15, and similarly, the second absorbent core 21 is also one in which the second absorbent core 23 is covered with a core wrap sheet 15. It is covered with a sheet 25. Therefore, an adhesive (not shown) for bonding the first absorbent core 11 and the second absorbent core 21 is applied to at least one of the two

core wrap sheets

15 and 25, and the adhesive The first absorbent core 11 and the second absorbent core 21 are joined by joining the two

core wrap sheets

15 and 25 together with the agent.

Note that the application pattern of the adhesive such as the hot melt adhesive mentioned above includes a stripe pattern in which a plurality of linear parts along the longitudinal direction are lined up in the width direction, and a plurality of spiral parts in the longitudinal direction. An example is a spiral pattern lined up in the width direction, but the pattern is not limited thereto.

Furthermore, as mentioned above, in FIGS. 4A to 4C, it has already been stated that "each end 40e2, 40e2 of the back sheet 40 in the width direction is covered by the

side sheets

50, 50"; In this covered portion 40e2, a non-skin side elastic member 57 (equivalent to an elastic member) such as a thread rubber is disposed along the longitudinal direction (FIG. 3), and The member 57 is fixed to both the back sheet 40 and the side sheet 50 with an adhesive while being stretched in the longitudinal direction. As shown in FIG. 3, the position at which the non-skin side elastic member 57 is fixed is from the narrowest width part of the constricted part 13c of the first absorbent core 13 to the end side in the width direction. This position corresponds to the position around the wearer's legs. Therefore, when the back sheet 40 and the side sheet 50 contract with the contractile force of the non-skin side elastic member 57, so-called leg gathers are formed at the same position. In other words, the non-skin side elastic member 57 may be provided at both ends of the urine absorbing pad 1 (absorbent article) in the width direction and at least in the central portion in the longitudinal direction. Further, as shown in FIGS. 4A and 4B, the non-skin side stretchable member 57 is arranged closer to the non-skin side than the skin-side surface of the absorbent body 10 in the thickness direction.

In this embodiment, two non-skin side elastic members 57 (elastic members) are provided on each side of the urine absorbing pad 1 in the width direction, but the number of non-skin side elastic members 57 is not limited to this. do not have. Further, the non-skin side elastic member 57 is not limited to rubber thread, and may be made of, for example, a plurality of elastic sheets arranged at intervals in the width direction, or a single elastic sheet. Moreover, in FIG. 3, only a portion (a so-called effective length portion) of each non-skin side elastic member 57 that exhibits elasticity is shown. Therefore, all parts of the illustrated non-skin side elastic member 57 in the longitudinal direction are elastic regions.

Further, the absorbent body 10 (the first absorbent body 11 and the second absorbent body 21) has a pair of deformation guiding regions 60 provided at an angle from the end side in the width direction toward the center side in the width direction. There is. For example, the deformation guiding region 60 is constituted by a compressed groove formed by embossing here. The pair of deformation induction regions 60 are regions where the rigidity of the absorbent core 10 has changed due to such compression, and serve as the starting point of deformation of the absorbent core 10. Further, in this embodiment, the pair of deformation guiding regions 60 are provided on both one side (front side) and the other side (back side) of the absorber 10 in the longitudinal direction. Then, the end regions 60et, 60et located on the widthwise end sides of the absorber 10 in the deformation guiding region 60 are located inside in the longitudinal direction from the central regions 60ct, 60ct on the widthwise center side. It is provided. Further, the deformation guiding region 60 is arranged so as not to overlap the longitudinal center line CL1 of the urine absorbing pad 1. Details of how the deformation of the absorbent core 10 is promoted by the deformation guiding region 60 will be described later.

As shown in FIGS. 3 and 4C, in this embodiment, the absorbent core 10 is a pair of liquids obtained by squeezing both the first absorbent core 11 and the second absorbent core 21 together from the skin side in the thickness direction. It has

diffusion guiding parts

70, 70. The pair of liquid diffusion guide portions 70 extend along the longitudinal direction on both sides of the absorber 10 in the width direction, and also extend on both sides of the absorber 10 in the longitudinal direction (front side) and the other side (rear side). It is provided. The outer end portions of the pair of liquid diffusion guide portions 70 in the longitudinal direction are provided up to the outer end portions of the first absorbent body 11 and the second absorbent body 21 in the longitudinal direction. The urine absorbed by the first absorbent body 11 and the second absorbent body 21 is diffused in the longitudinal direction through the liquid diffusion guide section 70. Thereby, urine can be absorbed by the entire absorber 10.

By the way, when the amount of incontinence increases due to aging or deterioration of symptoms in an absorbent article that absorbs urine, such as the urine absorbing pad 1, it is recommended to use a product with increased thickness or a larger size. It is also possible to try to improve absorption capacity by However, pads that are thicker or larger in size make it difficult to deform to fit the shape of the body and to fit properly, resulting in a gap between the body and the pad, which can lead to leakage. Sometimes it happens. Therefore, there is a need for an absorbent article that does not create a gap between the user's body and the absorbent article and can exhibit sufficient absorbent performance.

Regarding this point, in the present embodiment, by urging the absorber 10 to deform as described below, it is made difficult to form a gap between the user's body and the urine absorbing pad 1. FIG. 6 is a schematic diagram illustrating a state in which the absorber 10 is deformed. FIG. 6 shows the state of the urine absorbing pad 1 when the urine absorbing pad 1 is attached to the diaper 101 and worn by the user. When the urine absorbing pad 1 is worn, the back sheet 40 and the side sheet 50 contract on the non-skin side of the urine absorbing pad 1 due to the contraction force of the non-skin side elastic member 57, and so-called leg gathers are formed. , contraction force is also applied to the absorbent body 10 along the longitudinal direction. The absorbent body 10 (the first absorbent body 11 and the second absorbent body 12) of the present embodiment has a central deformation guiding portion 10S (11S, 21S), and a central portion 1C in the longitudinal direction of the absorbent body 10. Among the upper and lower two absorbent layers (the first absorbent core 11 and the second absorbent core 12), the widthwise dimension of the lower (non-skin side) second absorbent core 23 is the upper (skin side) (See FIGS. 3 and 4A). Similarly, in the longitudinal center portion 1C, the widthwise dimension of the central deformation guiding portion 11S of the first absorbent core 11 is smaller than the widthwise dimension of the central deformation guiding portion 21S of the second absorbent core 21. (Figure 4A). As described above, the central deformation guide portion 10S (11S, 21S) is a low basis weight portion having a basis weight of zero, that is, a portion where the rigidity of the absorbent body 10 changes and promotes deformation of the absorbent body 10. When the urine absorbing pad 1 is worn, the wearer's crotch tightening force is applied to the longitudinal central portion 1C of the urine absorbing pad 1 from both sides in the width direction, and due to the action of this crotch tightening force, the absorbent body 10 deforms starting from the central deformation guide portion 10S (11S, 21S). At that time, the width direction dimensions of the non-skin side absorbent body (second absorbent body 21) and the non-skin side central deformation guide portion 21S are the same as those of the skin side absorbent body (first absorbent body 11) and the skin side central deformation. Since each of the guide portions 11S is smaller than the widthwise dimension of the guide portion 11S, the absorbent body 10 deforms in a convex shape toward the skin starting from the central deformation guide portion 10S.

Then, due to the contraction of the non-skin side elastic member 57 and the leakage prevention wall elastic member 55, contraction force along the longitudinal direction acts on the pair of

deformation guiding regions

60, 60, respectively, and the contraction force along the pair of

deformation guiding regions

60, 60 is applied. , the longitudinal end portion of the absorbent body 10 that deforms in a convex shape toward the skin is defined. That is, convex deformation toward the skin is promoted using the pair of

deformation guiding regions

60, 60 as deformation starting points. As shown in FIG. 6, the absorber 10 has a central deformation guiding portion 10S (11S, 21S) and a pair of

deformation guiding regions

60, 60, so that the central region corresponding to the crotch area is convex toward the skin. One large dome-shaped protuberance R is formed. The raised portion R allows the absorbent core 10 to be brought into close contact over a wide area along the shape of the wearer's body, making it difficult to form a gap between the wearer's body and the urine absorbing pad 1. As a result, leakage can be suppressed.

In this embodiment, since the pair of

deformation guiding regions

60, 60 are provided on both one side (front side) and the other side (rear side) in the longitudinal direction, Although it becomes easier to form one large protruding portion R, the pair of

deformation guiding regions

60, 60 may not be provided on both one side (front side) and the other side (rear side) in the longitudinal direction. good. By providing a pair of

deformation guiding regions

60, 60 on at least one of one side or the other side in the longitudinal direction, the side where the deformation guiding region 60 is provided starts from the

deformation guiding regions

60, 60 whose rigidity changes. The absorber 10 tends to become convex toward the skin.

Note that the shape of the pair of

deformation guiding regions

60, 60 is not limited to the shape in this embodiment. For example, even if the pair of

deformation guiding regions

60, 60 are each formed by a linear region, may be formed.

Furthermore, the longitudinal dimension of the raised portion R that is convex toward the skin in the crotch region when worn should be 50% or less of the longitudinal dimension of the first absorbent core 13 or the second absorbent core 23. preferable.
By having such dimensions, it is possible to bring the protrusion R into close contact with the wearer's crotch region in just the right amount, prevent the body from separating from the absorbent body 10 in the front-rear direction, and prevent the wearer from separating from the body and urine. It is possible to prevent a gap from forming between the device and the removal pad 1, thereby suppressing leakage.

Furthermore, when the absorbent core 10 is deformed to form the raised portion R when worn, the narrowest width in the width direction of the region of the absorbent core 10 that forms the raised portion R is 75% of the longitudinal dimension of the raised portion R. % or less. With such dimensions of the raised portion R, the raised portion R can be accommodated in the wearer's crotch area without excess or deficiency. As a result, the absorbent core 10 can be prevented from separating from the body in the left and right directions of the body, making it difficult to create a gap between the body and the urine absorbing pad 1.

Further, in the longitudinal direction, at least a portion of the pair of

deformation guiding regions

60, 60 may have a portion where the constricted portion 13c of the first absorbent core 13 (the constricted portion 23c of the second absorbent core 23) overlaps. preferable. In this embodiment, the pair of

deformation guiding regions

60, 60 overlap with the constricted portion 13c of the first absorbent core 13 (the constricted portion 23c of the second absorbent core 23) in the longitudinal direction. In the longitudinal direction, the

deformation guiding regions

60, 60 serve as regions of varying rigidity, and define longitudinal ends along which the absorbent core 10 deforms convexly toward the skin. In the width direction intersecting the longitudinal direction, the constricted portion 13c (23c) facilitates deformation in the width direction. Due to the effects of both the

deformation guiding regions

60, 60 and the constricted portion 13c (23c), it becomes easier to form a three-dimensional raised portion R.

Further, as shown in FIG. 3, the length L13c (L23c) in the longitudinal direction of the constricted portion 13c (23c) is longer than the length L57 in the longitudinal direction of the non-skin side elastic member 57, that is, in the longitudinal direction. The non-skin side elastic member 57 is provided within the region where the constricted portion 13c (23c) is provided. The region in which the constricted portion 13c (23c) is provided means the area within which the constricted portion 13c (23c) exists in the longitudinal direction. The first absorbent core 13 and the second absorbent core 23 have a wide dimension in the width direction in the portions other than the constricted

portions

13c and 23c, respectively, and have high rigidity. The rigidity of the constricted

portions

13c, 23c is lower than that of the portions other than the constricted

portions

13c, 23c, and the entire area of the non-skin side elastic member 57 is within the range where the constricted

portions

13c, 23c are provided in the longitudinal direction. Therefore, the absorbent body 10 tends to shrink in the longitudinal direction. Therefore, it becomes easier to form the dome-shaped raised portion R.

Further, it is desirable that the outer end of the non-skin side elastic member 57 in the width direction does not overlap the first absorbent core 13 and the second absorbent core 23 in plan view. The "outer end in the width direction of the non-skin side elastic member 57" as used herein refers to the outer end in the width direction of the non-skin side

elastic members

57, 57 provided two on each side in the width direction. It means the outer end in the width direction of the non-skin side elastic member 57.
Further, unlike the present embodiment, when the non-skin side elastic member 57 is provided with one band-shaped (sheet-shaped) elastic member on each side in the width direction, the outer side of the band-shaped elastic member in the width direction is means the edge. With such a configuration, the portion where the first absorbent core 13 and the second absorbent core 23 are not present can be contracted by the non-skin side elastic member 57, so that the urine absorbing pad 1 can be more easily contracted in the longitudinal direction. , it becomes easier to form the raised portion R due to the deformation of the absorber 10.

In addition, the urine absorbing pad 1 of this embodiment has each leak-proof wall elastic member 55 that constitutes the leak-proof wall part 52 and each non-skin side elastic member 57 that forms leg gathers. It is desirable that the stress of the non-skin side elastic member 57 is larger than the stress of the leakage prevention wall elastic member 55. The stress here is not the stress of each non-skin-side elastic member 57 or each leak-proof wall elastic member 55, but the stress of the entire non-skin-side elastic member 57 provided and the entire leak-proof wall elastic member 55. means the stress of

Further, the end regions 60et, 60et of the pair of

deformation guiding regions

60, 60 are provided in the region where the constricted portion 13c of the first absorbent core 13 exists in the longitudinal direction. Similarly, the end regions 60et, 60et of the pair of

deformation guiding regions

60, 60 are provided in the region where the constricted portion 23c of the second absorbent core 23 exists in the longitudinal direction. Since the first absorbent core 13 (second absorbent core 23) is less present in the constricted portion 13c (23c), the absorbent core 10 (11, 21) is easily deformed and a raised portion R is easily formed. The presence of the end regions 60et, 60et of the

deformation guiding regions

60, 60, which are the starting points of rigidity changes, in such regions makes it easier to cause the absorber 10 to bulge.

Furthermore, in this embodiment, the central regions 60ct, 60ct of the

deformation guiding regions

60, 60 are provided in the region where the constricted portion 13c of the first absorbent core 13 exists in the longitudinal direction. Furthermore, the central regions 60ct, 60ct of the

deformation guiding regions

60, 60 are provided in the region where the constricted portion 23c of the second absorbent core 23 exists in the longitudinal direction. That is, the entire deformation guiding region 60 is arranged within the region of the constricted portion 13c (23c) in the longitudinal direction. The constricted portion 13c (23c) is easily deformed because the presence of the first absorbent core 13 (second absorbent core 23) itself is small, and the entire deformation guiding region 60 exists in the region of the constricted portion 13c (23c). This makes it easier to raise the absorber 10.

Furthermore, in the present embodiment, the central deformation guide portion 10S is provided in the region where the constricted portion 13c (23c) exists in the longitudinal direction, as described above. If the central deformation guide part 10S is longer than the constriction part 13c (23c) in the longitudinal direction, it becomes difficult to deform the absorbent body 10 in a convex shape toward the skin within the range of the constriction part 13c (23c), but the central deformation guide part When 10S is within the range of the constricted portion 13c (23c), it becomes easy to deform the absorbent body 10 into a convex shape toward the skin within the range of the constricted portion 13c (23c).

In this embodiment, as shown in FIG. 3, the front end 10Sea and the rear end 10Seb in the longitudinal direction of the central deformation guide portion 10S have a portion that overlaps with the deformation guide region 60 in the longitudinal direction. The central deformation guide portion 10S becomes a portion corresponding to the peak of the raised portion R when the absorber 10 deforms to form the raised portion R when worn. By extending the central deformation guiding portion 10S to a position where it overlaps with the deformation guiding region 60 in the longitudinal direction, the area where the portion corresponding to the peak of the raised portion R that is convex toward the skin is formed. be long enough. Thereby, formation of a firmly raised raised portion R can be promoted. Note that in the present embodiment, both longitudinal end portions 10Sea and 10Seb of the central deformation guide portion 10S have portions that overlap with the

deformation guide regions

60 and 60 in the longitudinal direction, but the present invention is not limited to this. It is sufficient that at least one end of 10Sea and 10Seb has a portion that overlaps the deformation guiding region 60 in the longitudinal direction.

Further, as shown in FIG. 3, the longitudinal ends 10Sea and 10Seb of the central deformation guide portion 10S are located inside the longitudinal direction of the outer end 60se of the central region 60ct of the deformation guide region 60, respectively. It is located in If the central deformation guiding portion 10S were provided to the outside of the deformation guiding region 60 in the longitudinal direction, the absorbent body 10 would deform into a dome-like protuberance when the urine absorbing pad 1 is attached. It becomes difficult. However, by locating the central deformation guiding portion 10S within the range where the pair of deformation guiding regions 60 exist in the longitudinal direction, it is possible to promote dome-shaped raised deformation.

Further, as shown in FIG. 3, it is desirable that the end region 60et of the deformation guiding region 60 is provided in the region where the non-skin side elastic member 57 exists in the longitudinal direction. The region in which the non-skin side elastic member 57 exists is a region of each non-skin side elastic member 57 that exhibits elasticity (a so-called effective length portion), and the non-skin side elastic member 57 shown in FIG. indicates only the part of the effective length. Since the end region 60et of the deformation guiding region 60 is located in the region where the non-skin-side elastic member 57 exists in the longitudinal direction, the contractile force of the non-skin-side elastic member 57 easily acts on the end region 60et, causing deformation. The absorbent body 10 is easily deformed using the guiding region 60 as a deformation starting point.

FIG. 7 is a diagram illustrating a state in which the unfolded urine absorbing pad 1 is placed on a horizontal surface under predetermined conditions. Here, in order to show the deformed state of the absorbent body 10 similar to when the urine absorbing pad 1 is attached, after folding the urine absorbing pad 1 in half so that the skin side surface of the urine absorbing pad 1 is on the outside, FIG. 7 shows a part of the urine absorbing pad 1 in a state where the urine absorbing pad 1 is unfolded and placed on a horizontal surface with the non-skin side surface of the urine absorbing pad 1 facing down. In this state, a raised portion R appears in the central portion 1C of the urine absorbing pad 1 in the longitudinal direction due to the deformation of the absorbent body 10. Then, the height from the horizontal plane of the absorbent body 10 to the highest point P2 where the leakage prevention wall elastic member 55 is highest is defined as H2, and the height from the horizontal plane to the highest point P1 where the height of the absorbent body 10 is highest is defined as H2. If H1, the height H2 is lower than the height H1 (H1>H2). By deforming in this way, the leak-proof wall elastic member 55 is prevented from coming into contact with the wearer's body in advance, and the raised portion R is likely to come into close contact with the wearer's body. Therefore, a gap is less likely to be formed between the absorbent body 10 and the body, and leakage can be suppressed.

In addition, in order to promote upheaval deformation in the central part of the absorbent body 10 in the longitudinal direction and the width direction, the inner side in the width direction of the non-skin side

elastic members

57, 57 and the leakage prevention wall elastic member 55 should be placed in the longitudinal direction. Preferably, no other constriction elements are provided along which constriction occurs. In this embodiment, the contraction of the non-skin side

elastic members

57, 57 and the leak-proof wall elastic member 55 promotes the rise of the central part in the longitudinal direction and the width direction of the absorber 10, but the contraction occurs in the central part of the width direction. Since there is no contraction element, the contraction force does not directly reach the widthwise central portion of the absorbent body 10, and the central portion can maintain a large degree of freedom in deformation. Therefore, when the absorbent body 10 absorbs liquid such as urine and swells, the deformation of the absorbent body 10 is easily tolerated. On the other hand, if there is a contraction element in the center of the width direction of the urine absorbing pad 1, the degree of freedom of deformation of the absorbent body 10 will be reduced, and the swelling of the absorbent body 10 will appear in a convex shape on the skin side surface, resulting in poor fit. There is a risk of loss of sexuality.

FIG. 8 is a schematic plan view of a part of the urine absorbing pad 1 in the unfolded and stretched state, viewed from the skin side.
In FIG. 8, the length in the longitudinal direction from the inner end 60ie to the outer end 60se of the deformation guiding region 60 of the absorber 10 is the first length N, and from the outer end 60se of the deformation guiding region 60 in the longitudinal direction A position located outside in the longitudinal direction by the first length N is defined as a reference position KP, and a predetermined area X is defined as an area from the inner end 60ie of the deformation guiding region 60 in the longitudinal direction to the reference position KP in the longitudinal direction. Here, the pair of liquid

diffusion guide parts

70, 70 provided in the absorber 10 have inner ends 70ie, 70ie in the longitudinal direction of the pair of liquid diffusion guide parts 70, respectively, within the above-mentioned predetermined area X. It is preferable that the Compared to the case where the longitudinal inner ends 70ie, 70ie of the pair of liquid

diffusion guide parts

70, 70 are not arranged within the predetermined area X, the longitudinal inner ends 70ie, 70ie of the liquid

diffusion guide parts

70, 70 are If it is located within the predetermined region It becomes easier. This allows efficient absorption using the entire surface of the absorber 10.

Returning to FIG. 3, in the present embodiment, the longitudinal ends 60se, 60se of the central regions 60ct, 60ct of the pair of

deformation guiding regions

60, 60 are spaced apart in the width direction. With this configuration, urine absorbed in the longitudinal and widthwise central portions of the absorbent body 10 is guided and absorbed from the spaced apart portions of the pair of

deformation guiding regions

60, 60 to the ventral and dorsal sides in the longitudinal direction. It can be diffused throughout the body 10. As a result, it is possible to prevent liquid (urine) from accumulating in the troughs of the raised portions R due to the deformation of the absorbent body 10, and to promote efficient absorption using the entire surface of the absorbent body 10.

In the present embodiment, the longitudinal ends 60se and 60se of the central regions 60ct and 60ct of the pair of

deformation guiding regions

60, 60 are spaced apart in the width direction, but the present invention is not limited to this, and the central regions 60ct and 60ct The longitudinal ends 60se and 60se may be connected without being separated. For example, the pair of

deformation guiding regions

60, 60 may have a so-called V-shape or an arc shape. Even if the longitudinal ends 60se and 60se in the central regions 60ct and 60ct are connected, it is possible to define the longitudinal ends of the convex deformation of the absorber 10.

Further, as shown in FIGS. 3, 4A, and 4B, the urine absorbing pad 1 of this embodiment has a design that is visible from the skin side of the urine absorbing pad 1 at least at the center in the longitudinal direction and the width direction. The design is applied to a design sheet 33ds, and the design sheet 33ds is placed between the topsheet 30 and the first absorbent core 11. As shown in FIG. 3, the design sheet 33ds of this embodiment has a grid pattern. Since such a design is applied to the central part of the urine absorbing pad 1, the central part is visually emphasized during use. The location where this design is applied is the part that rises toward the skin during use, and by emphasizing the part that becomes the raised part (R), the user is informed of a good fit and improved safety against leakage. can give an image.

===Second embodiment===
As an absorbent article according to a second embodiment of the present invention, a pants-type disposable diaper 200 (hereinafter also referred to as "diaper 200") will be described as an example.

<Basic configuration of diaper 200>
FIG. 9 is a schematic perspective view of a diaper 200 in the second embodiment. FIG. 10 is a plan view of the diaper 200 in the unfolded and stretched state. FIG. 11 is a schematic cross-sectional view taken along line CC in FIG. 10. Note that the "stretched state" of the diaper 200 is the same as the stretched state described in the first embodiment.

The diaper 200 is a disposable diaper that has a pants-shaped shape in its natural state, and in the pants-shaped state shown in FIG. and a pair of leg openings LH, LH. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. Further, the front side in the front-back direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's back side. Moreover, in the unfolded state of FIG. 10, the diaper 200 has a "longitudinal direction" and a "width direction" that intersect with each other. The longitudinal direction in the unfolded state shown in FIG. 10 is the direction along the vertical direction in the pants-shaped state shown in FIG. Note that the above-mentioned width direction in the unfolded state is the same direction as the above-mentioned left-right direction in the pants-shaped state. Moreover, as shown in FIG. 11, the direction in which the materials constituting the diaper 200 are laminated is defined as the "thickness direction." Similarly to the first embodiment, the side in contact with the wearer's skin in the thickness direction is defined as the skin side, and the opposite side is defined as the non-skin side.

The diaper 200 includes an absorbent main body 210 (hereinafter also referred to as "absorbent body 210") and a waist member 220 disposed on the non-skin side of the absorbent main body 210. The waist member 220 is an exterior member that constitutes the exterior of the diaper 200.

From the unfolded state shown in FIG. 10, the absorbent main body 210 and the waist member 220 are folded in half with the longitudinal center position CL as the folding position. In this folded state, the front part of the waist member 220 and the rear part of the waist member 220, which face each other, are joined and connected to each other at both sides in the width direction (left and right direction), and a pair of side

joint parts

220s, 220s is formed. That is, the front part of the waist member 220 and the rear part of the waist member 220 are formed into an annular shape by the pair of

side joints

220s, 220s. Note that the side joint portion 220s is formed by a known joining means such as welding or adhesion. As a result, the diaper 200 is in a pant-like state in which a waist opening BH and a pair of leg openings LH and LH are formed as shown in FIG. 9 .

In this embodiment, as shown in FIG. 10, in the longitudinal direction of the waist member 220, a portion that overlaps with the side joint portion 220s formed on the front side is referred to as a "front waist portion 230."
The front waist portion 230 is a portion located on the wearer's ventral side when the diaper 200 is worn. Similarly, in the longitudinal direction of the waist member 220, a portion that overlaps with the side joint portion 220s formed on the rear side is referred to as a “rear waist portion 240”. The rear waist portion 240 is a portion located on the back side (buttock side) of the wearer when the diaper 200 is worn. The portion located between the front waist portion 230 and the rear waist portion 240 in the longitudinal direction is referred to as "crotch CA."
The crotch CA is a portion located in the wearer's crotch when the diaper 200 is worn.

(Absorbent body (absorbent body) 210)
12A is a plan view of the absorbent main body 210, and FIG. 12B is a schematic cross-sectional view taken along line DD in FIG. 12A. The absorbent main body 210 includes an absorbent core 213 that absorbs excretory liquid, a top sheet 216 that is placed closer to the skin in the thickness direction than the absorbent core 213, and a top sheet 216 that is placed closer to the skin than the absorbent core 213. and a back sheet 217. However, the absorbent main body 210 may include sheet members other than this. For example, a second sheet (not shown) may be provided between the top sheet 216 and the absorbent core 213 in the thickness direction.

The materials of the absorbent core 213, the topsheet 216, and the backsheet 217 are the same as the absorbent core (first absorbent core 13, second absorbent core 23) and topsheet 30 in the urine absorbing pad 1 of the first embodiment. , and the back sheet 40, respectively, are made of substantially the same material. The absorbent core 213 is covered with a core wrap sheet 215 made of tissue paper or the like, for example, in order to suppress collapse of the core 213 and maintain its outer shape. The absorbent core 213 of this embodiment has a constricted portion 213c, which is narrower in the width direction than both ends, between both ends in the longitudinal direction. The constricted portion 213c has a portion where the width in the width direction is the narrowest at the center portion of the core 213 in the longitudinal direction. Further, the absorbent core 213 is provided with a central deformation guiding portion 10S' and a pair of

deformation guiding regions

60', 60', similar to the urine absorbing pad diaper 1 of the first embodiment.

In this embodiment, the top sheet 216 has both sides in the width direction (left and right direction) folded back toward the non-skin side so as to wrap around the absorbent core 213 as shown in FIG. 12B. Furthermore, a pair of leakage prevention walls 252 are provided along the longitudinal direction on both sides of the absorbent main body 210 in the width direction. In this embodiment, the leak-proof wall section 252 is formed of a leak-proof wall sheet 250 (FIG. 12B). A leak-proof wall elastic member 255 (corresponding to an elastic member) such as a thread rubber that can be contracted in the longitudinal direction is attached to the skin-side end of the leak-proof wall part 252 in a fixed state in a stretched state in the longitudinal direction. There is. When the diaper 200 is worn, the leak-proof wall portion 252 stands up on the wearer's skin side based on the elasticity exhibited by the leak-proof wall elastic member 255, and fits the wearer's crotch area.

(Girth member 220)
As shown in FIG. 11, the waist member 220 includes a skin-side sheet 221 disposed on the skin side in the thickness direction, and a non-skin-side sheet 232 laminated adjacent to the non-skin side of the skin-side sheet 221. (front side) and a non-skin side sheet 242 (rear side).

The front waist section 230 includes a skin side sheet 221, a non-skin side sheet 232, and a waist elastic member 235 provided between the two in the thickness direction. The skin-side sheet 221 is a continuous sheet member from the front waist portion 230 to the rear waist portion 240 of the diaper 220, and is formed of, for example, SMS nonwoven fabric. The non-skin side sheet 232 is a sheet member laminated on the non-skin side of the skin side sheet 221, and is formed of, for example, SMS nonwoven fabric. The upper end portion (front end portion in the front-rear direction) of the non-skin side sheet 232 is folded back from the non-skin side to the skin side and from the front side to the rear side in the front-rear direction to form a folded portion 232f. However, the folded portion 232f does not necessarily have to be provided.

The torso elastic members 235 are made of rubber thread or the like, and are arranged between the skin side sheet 221 and the non-skin side sheet 232 at intervals in the vertical direction, and are attached in a state where they are stretched in the width direction. It is being The elasticity exhibited by the waist elastic member 235 allows the front waist portion 230 to fit around the wearer's ventral waist.

The waist elastic member 235 can be attached using an adhesive such as a hot melt adhesive. For example, hot melt adhesive is applied continuously or intermittently along the waist elastic member 235, stretched at a predetermined stretching ratio, and sandwiched between the skin side sheet 221 and the non-skin side sheet 232. can be installed.

Of the waistline member 220, the rear waistline portion 240 has substantially the same configuration as the front waistline member 230. That is, the rear waist section 420 includes a skin-side sheet 221 disposed on the skin side in the thickness direction, a non-skin-side sheet 242 laminated on the non-skin side of the skin-side sheet 221, and a skin-side sheet 221 and a non-skin side sheet 242 stacked on the skin side in the thickness direction. It has a waist elastic member 245 provided between it and the skin side sheet 242 in the thickness direction.

The external shape of the waist member 220 is partially different between the front side and the rear side in the longitudinal direction. Further, as shown in FIG. 10, a substantially trapezoidal buttock cover 246 is provided in a region (crotch CA) below the side joint portion 220s of the rear waist portion 240 in the vertical direction. The buttock cover 246 is formed by being laminated on the skin-side sheet 221 of the rear waist portion 240 from the non-skin side, and the width in the lateral direction becomes narrower from the upper side to the lower side in the vertical direction. The provision of the buttock cover 246 allows the waist member 220 to widely cover the wearer's buttocks when the diaper 200 is worn.

The buttock cover 246 is provided with a leg elastic member 247 such as a rubber thread as shown in FIGS. 10 and 11. The leg elastic member 247 is attached between the skin-side sheet 221 and the buttock cover 246 while extending along the outer edge of the buttock cover 246 (that is, a part of the peripheral edge of the leg opening LH). Due to the elasticity exhibited by the leg elastic members 247, when the diaper 200 is worn, the buttock cover 246 can easily fit around the wearer's buttocks, and is less likely to be rolled up from the buttocks.

(Front deformation guide section 280)
In the second embodiment, as shown in FIG. 12A, a front deformation guide part 280 that guides the absorbent core 213 to deform in the thickness direction is located in front of the central position (CL) in the longitudinal direction. A pair is provided. The front deformation guide portion 280 is a low basis weight portion that has a lower basis weight than other regions of the absorbent core 213. When the diaper 200 is worn, the front deformation guide portion 280 serves as a bending point and guides the absorbent core 213 to deform in the thickness direction.

Note that the front deformation guiding part 280 is not limited to the low basis weight part as described above, and for example, a slit in which the basis weight of the absorbent core 213 is zero, or a part in which the absorbent core 213 has increased rigidity. It may be a highly rigid part. Alternatively, a predetermined portion of the absorbent core 213 may be bent to make the absorbent core 213 more likely to be bent or deformed, or other structures may be used.

FIG. 13 is a partially enlarged view of the absorbent main body 210 illustrating the arrangement of the front deformation guide portion 280. In the diaper 200, each of the pair of front deformation guide parts 280 has a front slope part 280a that slopes from the front side to the rear side in the front-rear direction (longitudinal direction) and from the outside to the inside in the width direction. The entire front deformation guide part 280 of this embodiment is inclined from the front side to the rear side in the front-rear direction (longitudinal direction) and from the outside to the inner side in the width direction. It is.

Further, the point at which the front deformation guide portion 280 starts to tilt is defined as a tilt start point 280as, and the point located rearward of the tilt start point 280as and where the tilt ends is defined as a tilt end point 280ae. The front slope portion 280a may be formed in a straight line between the slope start point 280as and the slope end point 280ae, or may be formed in a curve. Further, the front deformation guide portion 280 may have a straight portion along the front-rear direction, or a portion of the front deformation guide portion 280 may have a discontinuous portion.

When the user of the diaper 200 wears the diaper 200, the front deformation guiding section 280 is placed along the wearer's inguinal region, and the front deformation guide unit 280 is arranged along the wearer's groin area, and causes the front deformation to occur in accordance with the movement of the wearer's legs in sitting and standing positions. The outer absorbent core 213 of the guide portion 280 can be deformed so as to be located above the inner absorbent core 213 (on the skin side). Thereby, the absorbent core 213 can be brought into close contact with the gap in the inguinal region where leakage is likely to occur, and leakage can be suppressed.

Further, as shown in FIG. 13, a straight line or an extension line ET280 of the straight line connecting the slope start point 280as and the slope end point 280ae on one side (right side in this case) of the pair of front side slope parts 280a extends in the thickness direction. When viewed (in a so-called plan view), it intersects with one of the pair of

deformation guiding regions

60', 60'. With such a configuration, the force that induces deformation applied to the front inclined portion 280a is easily transmitted to the deformation inducing region 60', and the absorbent body (absorbent core) 210 is easily transferred to the deformation inducing region 60'. It becomes easier to deform the surface into a convex shape. This makes it easier to bring the absorbent body (absorbent core) 210 into close contact.

Further, as shown in FIG. 12A, there is a portion where the front deformation guide portion 280 and the constricted portion 213c of the absorbent core 213 overlap in the longitudinal direction. The constricted portion 213c is a part that easily comes into contact with the wearer's legs, and by providing the front deformation inducing portion 280 along the constricted portion 213c, the outer absorbent core 213 of the front deformation inducing portion 280 is connected to the inner absorbent core. It is easy to transform it so that it is on the upper part of 213 (skin side). With such a configuration, the absorbent core 213 can be brought into close contact with the gap in the inguinal region where leakage is likely to occur, thereby suppressing leakage.

Similarly to the first embodiment, in the second embodiment, when the diaper 200 is worn, the absorber 210 of the diaper 200 starts from the central deformation guiding portion 10' and the pair of

deformation guiding regions

60', 60'. It deforms so that it becomes convex on the skin side. Specifically, when wearing the diaper 200, both sides of the absorbent body 210 in the width direction are pulled up while contacting the wearer's legs, so the central deformation guiding portion 10S' portion comes into contact with the crotch area first. At this time, the absorbent body 210 deforms in a convex shape toward the skin starting from the central deformation guiding portion 10' and the pair of

deformation guiding regions

60', 60'. Further, the

deformation guiding regions

60' and 60' provided on both one side (front side) and the other side (rear side) in the longitudinal direction, respectively, are configured to prevent convex deformation of the absorbent body 10 toward the skin side in the longitudinal direction. In other words, the absorber 210 has one large dome-shaped protuberance (not shown) that is convex toward the skin in the central region corresponding to the crotch area, as in the first embodiment. It is formed. Then, the deformation along the inguinal region starting from the raised portion and the front deformation guiding portion 280 allows the absorbent body 210 to be brought into close contact with a wide area along the shape of the wearer's body. There will be fewer gaps between the two. As a result, leakage can be suppressed.

Also, in this embodiment, as in the first embodiment, another contraction element that contracts in the longitudinal direction is provided inside the leakage wall elastic member 255 (expandable member) in the width direction. It is desirable that there is no such thing. Since there is no contraction element in the widthwise central part, the contraction force does not directly reach the widthwise central part of the absorbent body 210, and the central part can maintain a large degree of freedom in deformation, allowing liquids such as urine to When the absorbent body 210 swells due to absorption, deformation of the absorbent body 210 is easily tolerated.

FIG. 14 shows a modification of the diaper 200. As shown in FIG. 14, the absorbent main body (absorbent body) 210 further has a deformation starting point along the front-rear direction (longitudinal direction) between the pair of front deformation guide

parts

280, 280 in the width direction. It has a front central deformation guide portion 285. The front center deformation guide portion 285 may be formed by, for example, a compressed groove formed by embossing. The front central deformation guide portion 285 is a region where the rigidity of the absorbent body (absorbent core) 210 has changed due to such compression, and serves as a starting point for deformation of the absorbent core 210. Note that the front central deformation guide portion 285 is not limited to the compressed groove, and may be formed, for example, by a low basis weight portion that is lower than the basis weight (g/m2) of the liquid absorbent material in the area adjacent from the outside in the width direction. You can. While deforming the outer absorbent body 210 of the front deformation guiding portion 280 to be above the inner absorbent body 210 (on the skin side), the front central deformation guiding portion 285 is deformed into a downward convex shape (on the non-skin side). By doing so, it is possible to form a space on the front side while keeping the absorbent body 210 in close contact with the gap in the groin area where leakage is likely to occur. This space functions as a space for temporarily storing urine, and can suppress leakage from the groin area.

===Others===
The above-described embodiments are provided to facilitate understanding of the present invention, and are not intended to be interpreted as limiting the present invention. It goes without saying that the present invention may be modified and improved without departing from its spirit, and that the present invention includes equivalents thereof.

In the first embodiment, the urine absorbing pad 1 was cited as an example of the absorbent article, but the invention is not limited thereto. For example, it may be a sanitary napkin that absorbs menstrual blood instead of urine.

In the first embodiment, the low basis weight portion 10S forming the central deformation guiding portion 10S is provided in both the first absorbent body 11 and the second absorbent body 21, but the present invention is not limited thereto. The low basis weight portion 10S may be provided at least in the first absorbent core 11. By providing the low basis weight portion 10S in the first absorbent body 11, which is located closer to the skin in the thickness direction than the second absorbent body 21, urine can be quickly diffused into the interior of the absorbent body 10. , it is possible to reduce the accumulation of liquid on the surface of the absorber 10 and suppress leakage.

In the second embodiment, the absorbent main body (absorbent body) 210 has a front center deformation guiding section 285, but the front center deformation guiding section 285 is longer than the

deformation guiding regions

60', 60' on the other side (rear side) in the longitudinal direction. A rear center deformation guide portion may be further provided on the outside (rear side) of the direction. Thereby, deformation in the thickness direction of the absorbent core 213 along the buttocks of the wearer can be promoted starting from the rear central deformation guide portion on the rear side in the longitudinal direction of the absorbent body 210 as well.

1 Urine absorbing pad (absorbent article)
1C Central part 10 Absorber 10S Central deformation inducing part (low basis weight part)
10S' Central deformation guide part 10Sea Front end 10Seb Rear end 11 First absorbent body 11cs Part 11S Central deformation guide part 12 Second absorbent body 13 First absorbent core 13c Constriction part 13cn Constriction start position 13cp Constriction start position 15 Core wrap sheet 21 Second absorbent body 21S Central deformation guiding part 23 Second absorbent core 23c Constriction part 23cn Constriction start position 23cp Constriction start position 23ee End part 25 Core wrap sheet 30 Top sheet 30e2 Edge part 30ee2 Edge part 33ds Design sheet 40 Back sheet 40e2 End portion 40ee2 Edge portion 50 Side sheet 50b Base (fixed portion)
50f Free end portion 50fa Front end portion 50fb Rear end portion 52 Leakage prevention wall portion 55 Leakage prevention wall elastic member (expandable member)
57 Non-skin side elastic member (elastic member)
60 Deformation guidance region 60' Deformation guidance region 60ct Central region 60et End region 60ie Inner end in longitudinal direction 60se Outer end in longitudinal direction 70 Liquid diffusion guide portion 70ie Inner end in longitudinal direction 81 Male member of zipper 101 Diaper (disposable diaper)
101a Front body 101ae2 End 101b Back body 101be2 End 101m Longitudinal center (crotch)
110 Absorbent body 130 Top sheet 140 Back sheet 200 Pants-type disposable diaper 210 Absorbent main body (absorbent body 210)
220 Waist member 220s Side joint portion 230 Front waist portion 240 Back waist portion 213 Absorbent core 216 Top sheet 217 Back sheet 215 Core wrap sheet 213c Narrow portion 221 Skin side sheet 232 Non-skin side sheet 235 Waist elastic member 232f Folded portion 242 Non-skin side sheet 245 Waist elastic member 246 Buttock cover 247 Leg elastic member 250 Leak-proof wall sheet 252 Leak-proof wall part 255 Leak-proof wall elastic member (stretchable member)
280 Front deformation guide part 280a Front slope part 280as Incline start point 280ae Incline end point 285 Front central deformation guide part BH Waist opening CA Crotch LH Leg opening ET280 Extension line

Claims

An absorbent article having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in a deployed state, and comprising a liquid-absorbing absorbent body,
The absorbent body has a central deformation guide portion extending in the longitudinal direction and serving as a deformation starting point in a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation inducing regions that are inclined from the end sides in the width direction toward the center side in the width direction,
In the deformation inducing region, an end region of the deformation inducing region located on the end side in the width direction of the absorber is located inside in the longitudinal direction than a central region on the center side in the width direction. , and the deformation guiding region is arranged so as not to overlap the longitudinal center line of the absorbent article,
An absorbent article characterized in that an elastic member that expands and contracts in the longitudinal direction is provided at both ends of the absorbent article in the width direction and at least in a central portion in the longitudinal direction.
The absorbent article according to claim 1,
The absorbent body has an absorbent core,
The absorbent core has a narrowed portion between both ends in the longitudinal direction, the width being narrower in the width direction than both ends,
An absorbent article characterized in that the absorbent article has a portion where at least a portion of the deformation guiding region and the constricted portion overlap in the longitudinal direction.
The absorbent article according to claim 2,
The absorbent article is characterized in that the central region of the deformation guiding region is provided within a region where the constricted portion exists in the longitudinal direction.
The absorbent article according to claim 1 or 2,
An absorbent article characterized in that at least one end of the central deformation guide portion in the longitudinal direction has a portion that overlaps the deformation guide region in the longitudinal direction.
The absorbent article according to claim 1 or 2,
The absorbent material is characterized in that the longitudinal ends of the central deformation inducing section are located inside in the longitudinal direction from the longitudinal outer ends of the central region of the deformation inducing regions. Goods.
The absorbent article according to claim 1 or 2,
The absorbent article is characterized in that the end region of the deformation guiding region is provided within a region where the elastic member is present in the longitudinal direction.
The absorbent article according to claim 1 or 2,
A pair of leakage prevention wall portions are provided on both sides of the absorber in the width direction,
The elastic member is a leak-proof wall elastic member that is provided in the pair of leak-proof wall parts and is fixed in an extended state in the longitudinal direction and is contractible in the longitudinal direction,
After folding the absorbent article in half so that the skin-side surface of the absorbent article is on the outside, the absorbent article is unfolded again and placed on a horizontal surface with the non-skin-side surface of the absorbent article facing down. In a stationary state, the height from the horizontal plane to the highest point of the leak-proof wall elastic member is lower than the height from the horizontal plane to the highest point of the absorber. An absorbent article characterized by:
The absorbent article according to claim 1 or 2,
An absorbent article characterized in that no other contraction element that contracts along the longitudinal direction is provided inside the elastic member in the width direction.
The absorbent article according to claim 1 or 2,
The absorbent article is characterized in that the central deformation guiding portion is formed by a low basis weight portion that is lower in basis weight than the area adjacent from the outside in the width direction.
The absorbent article according to claim 9,
The absorbent body includes a first absorbent body and a second absorbent body provided on the non-skin side in the thickness direction from the first absorbent body,
An absorbent article, wherein the low basis weight portion is provided at least in the first absorbent body.
The absorbent article according to claim 1 or 2,
The absorbent body has a pair of liquid diffusion guide portions extending along the longitudinal direction on both sides of the width direction, on both one side and the other side of the longitudinal direction,
The length in the longitudinal direction from the inner end to the outer end of the deformation guide region in the longitudinal direction is a first length, and the length of the deformation guide region is equal to the first length from the outer end in the longitudinal direction of the deformation guide region. A position on the outside of the direction is a reference position, and in the longitudinal direction, an area from the inner end of the deformation guiding region in the longitudinal direction to the reference position is a predetermined area, The absorbent article, wherein each of the inner ends in the longitudinal direction is disposed within the predetermined region.
The absorbent article according to claim 1 or 2,
The absorbent article is characterized in that the longitudinal ends of the pair of deformation guiding regions are spaced apart from each other in the width direction in the central region.
The absorbent article according to claim 1 or 2,
An absorbent article characterized in that the pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction, respectively.
The absorbent article according to claim 1 or 2,
An absorbent article having a design that is visible from the skin side of the absorbent article at least at the center in the longitudinal direction and the width direction.
The absorbent article according to claim 1,
The absorbent article is characterized in that, in the unfolded and stretched state, the stretchable member is a non-skin-side stretchable member disposed on the non-skin side of the absorbent core in the thickness direction.
The absorbent article according to claim 15,
The absorbent body has an absorbent core,
The absorbent core has a narrowed portion between both ends in the longitudinal direction, the width being narrower in the width direction than both ends,
The length of the constricted portion in the longitudinal direction is longer than the length of the non-skin side elastic member in the longitudinal direction,
An absorbent article characterized in that, in the longitudinal direction, the non-skin side elastic member is provided in a region where the constricted portion is provided.
17. The absorbent article according to claim 16,
An absorbent article characterized in that the outer end in the width direction of the non-skin side elastic member does not overlap the absorbent core in plan view.
The absorbent article according to claim 1 or 2,
The absorbent body has an absorbent core,
When the longitudinal direction is the front-back direction, the front side in the front-back direction corresponds to the wearer's ventral side, and the rear side in the front-back direction corresponds to the wearer's back side,
A pair of front deformation guide portions that guide the absorbent core to deform in the thickness direction are provided in the width direction on the front side of the central position in the front-rear direction,
The absorbent article, wherein each of the pair of front deformation guide portions has a front slope portion that slopes from the front side to the rear side in the front-back direction and from the outside to the inside in the width direction.
The absorbent article according to claim 18,
Each of the pair of front deformation guide portions has an inclination start point where the inclination starts, and an inclination end point located on the rear side of the inclination start point and where the inclination ends,
A straight line connecting the inclination start point and the inclination end point on one side of the pair of front side inclined parts or an extension thereof is one of the pair of deformation induction regions when viewed in the thickness direction. An absorbent article characterized by intersecting with.
The absorbent article according to claim 18 or 19,
The absorbent body has an absorbent core,
The absorbent core has a narrowed portion between both ends in the longitudinal direction, the width being narrower in the width direction than both ends,
An absorbent article having a portion where the front deformation guide portion and the constricted portion overlap in the longitudinal direction.
The absorbent article according to claim 18 or 19,
The absorbent body is characterized in that the absorbent body has a front center deformation inducing part along the front-rear direction and serving as a deformation starting point between the pair of front deformation inducing parts in the width direction. Goods.