JP7196351B1 - absorbent article - Google Patents

Abstract

[Problem] To provide an absorbent article capable of suppressing leakage by making it difficult for a gap to form between the wearer's body and the absorbent article by bringing the absorbent body into close contact over a wide surface along the shape of the wearer's body. It is in. An absorbent article (1) comprising an absorbent body (10), the absorbent body (10) having a central deformation guide portion (21S), the absorbent body (10) having a pair of deformation guides. The deformation-inducing region (60) has an end region (60et) located on the end side in the width direction of the absorbent body (10) in the deformation-inducing region (60), and the center in the width direction. The deformation-inducing region (60) is located longitudinally inside the side central region (60ct) and does not overlap the longitudinal central line of the absorbent article (1). Elastic members (55, 57) that extend and contract in the longitudinal direction are provided at both ends in the width direction of and at the central portion in the longitudinal direction. [Selection drawing] Fig. 3

Description

The present invention relates to absorbent articles.

Conventionally, in an absorbent article having an absorbent body that absorbs excretions such as urine and menstrual blood, the absorbent body is deformed into a predetermined shape by bending or the like when worn, thereby improving leakproofness and fit. is known. For example, in Patent Document 1, the absorbent body has a concave portion on the back sheet side surface, and has a pair of grooves on the top sheet side surface of the absorbent body. An absorbent article is disclosed in which the upper absorbent layer bends in a substantially V-shape around a groove, and deforms into a shape in which the upper absorbent layer protrudes toward the wearer's skin in a curved shape. Further, for example, in Patent Document 2, an elastic member extending in the longitudinal direction is provided between the absorber and the outermost sheet in the lateral center of the absorber arrangement area, and the elastic member An absorbent article is disclosed in which a portion of an absorbent body, which is overlapped with a stretchable region where an elastic member exists in plan view, is deformed by contraction so as to conform to a wearer's intergluteal cleft.

Japanese Patent No. 4459013 JP 2020-103884 A

As described above, there are known absorbent articles that improve fit by deforming the absorbent body when worn. If the amount of excretion by the user increases, or if the amount of excretion by the user is originally large, it is conceivable to change the product to a thicker or larger size product in order to improve the absorption capacity. However, if a product with increased thickness or a large size is used, it will be difficult to deform it according to the shape of the user's body and to wear it properly, resulting in a gap between the product and the body and leakage. You may be induced.

In this regard, in the absorbent article of Patent Document 1, the absorbent body can be deformed into a so-called W-shape when worn, but if the thickness of the absorbent body is increased or the size of the product itself is increased, the shape of the absorbent body will not change. Such a W-shaped deformation becomes difficult, so there is a possibility that a gap may be generated between the body and the wearer's body. In addition, in the absorbent article of Patent Document 2, the elastic member extending in the longitudinal direction provided in the central portion in the lateral direction shrinks the absorber to promote deformation. It becomes difficult for the absorbent body to contract, and there is a possibility that it becomes difficult to achieve deformation along the wearer's gluteal cleft. In other words, even in thicker products or large-sized absorbent articles, gaps between the body and the absorbent article are less likely to occur, and absorbent performance is required to be fully exhibited.

The present invention has been made in view of the above problems, and its object is to bring the absorbent body into close contact with the wearer's body over a wide area along the shape of the body of the wearer and the absorbent article. To provide an absorbent article capable of suppressing leakage by making it difficult for gaps to occur between them.

The main invention for achieving the above object is an absorbent article for absorbing urine, which has a longitudinal direction, a width direction, and a thickness direction that intersect each other in an unfolded state, and is provided with a liquid-absorbent absorbent body. There is
The absorbent body has a central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point at a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation induction regions that are provided so as to be inclined from the widthwise end sides toward the widthwise central side,
In the deformation-inducing region, an end region of the deformation-inducing region positioned on the end side in the width direction of the absorber is positioned inside in the longitudinal direction of a center region on the center side in the width direction. ,
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 at the central portion in the longitudinal direction,
The pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction,
The absorbent body has an absorbent core,
The absorptive core has a constricted portion having a narrower width in the width direction than the both ends between the longitudinal ends,
The pair of deformation guiding regions provided on one side in the longitudinal direction are defined as a pair of deformation guiding regions on one side, and the pair of deformation guiding regions provided on the other side in the longitudinal direction are defined as a pair of deformation guiding regions on the other side. When the inductive region is
In the longitudinal direction, at least a portion of the one-side deformation-inducing region and the constricted portion have an overlapping portion,
In the longitudinal direction, at least a portion of the other-side deformation-inducing region and the constricted portion have an overlapping portion,
After folding the absorbent article in two so that the skin-side surface of the unfolded absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. It is configured such that, in a state where it is left standing still, a protruding portion is formed on the skin side in a region corresponding to the crotch portion,
The one-side deformation-inducing region is a deformation starting point of the protuberance on the one side,
the other side deformation guiding region is a deformation starting point of the protuberance on the other side;
The absorbent body has a first absorbent body and a second absorbent body provided on the non-skin side in the thickness direction of the first absorbent body,
The first absorbent body and the second absorbent body have the central deformation induction part,
In the central portion of the absorbent body in the longitudinal direction, the widthwise dimension of the absorbent core of the second absorbent body is smaller than the widthwise dimension of the absorbent core of the first absorbent body,
In the central portion of the absorbent body in the longitudinal direction, the widthwise dimension of the central deformation-inducing portion of the first absorbent body is larger than the widthwise dimension of the central deformation-inducing portion of the second absorbent body.
An absorbent article characterized by:
Other features of the present invention will become apparent from the description of the specification and accompanying drawings.

ADVANTAGE OF THE INVENTION 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 to prevent a gap from forming between the wearer's body and the absorbent article, thereby suppressing leakage. can provide.

FIG. 1A is a schematic plan view showing the underpants-type disposable diaper 101 separated at the junction between the front body 101a and the back body 101b and developed on a plane, and FIG. 1B is a cross-sectional view along the line AA in FIG. 1A. 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 an unfolded and stretched 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 unfolded and stretched state, viewed from the non-skin side; FIG. 4 is a schematic diagram illustrating a state in which the absorber 10 is deformed; FIG. 2 is a diagram illustrating a mode when the urine absorbing pad 1 in an unfolded state is left on a horizontal surface under predetermined conditions; Fig. 2 is a schematic plan view of part of the urine absorbing pad 1 in an unfolded and stretched state as seen from the skin side. It is a schematic perspective view of the diaper 200 in 2nd Embodiment. 1 is a plan view of diaper 200 in an unfolded and stretched state; FIG. 11 is a schematic cross-sectional view along line CC of FIG. 10; FIG. 12A is a plan view of the absorbent body 210, and FIG. 12B is a schematic cross-sectional view taken along line DD of FIG. 12A. FIG. 11 is a partially enlarged view of the absorbent main body 210 for explaining the arrangement of the front deformation guide part 280. FIG. It is a modification of the diaper 200. FIG.

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.
Aspect 1 is an absorbent article having a longitudinal direction, a width direction, and a thickness direction that intersect each other in an unfolded state, and comprising a liquid-absorbing absorbent body, wherein the absorbent body has the longitudinal direction and the width direction. A central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point is provided at a central portion in both directions, and the absorbent body is inclined from the end sides in the width direction toward the center side in the width direction. and the deformation guiding region has an end region located on the end side of the absorbent body in the width direction of the deformation guiding region, the center in the width direction The deformation guiding region is positioned inside the longitudinal direction of the central region of the absorbent article, and the deformation guiding region is arranged so as not to overlap the longitudinal central line of the absorbent article. The absorbent article is characterized in that elastic members that expand and contract in the longitudinal direction are 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 provide the absorber with a large convex shape on the skin side in the central region corresponding to the crotch region. A single domed ridge is formed. The protuberances allow the absorbent body to be in close contact with the wearer's body over a wide area, making it difficult for a gap to form 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 in the width direction is narrower than that of the both ends, The absorbent article according to Aspect 1, wherein at least part of the deformation-inducing region overlaps with the constricted portion in the longitudinal direction.

According to the absorbent article of aspect 2, the deformation-inducing region serves as a rigidity changing portion in the longitudinal direction, and the deformation-inducing region defines the end portion in the longitudinal direction where the absorber deforms convexly toward the skin. In the width direction that intersects with the longitudinal direction, the absorbent core tends to be deformed in the width direction by the constricted portion. The effects of both the deformation-inducing region and the constricted portion facilitate the formation of a three-dimensional raised portion (dome shape).

Aspect 3 is the absorbent article according to Aspect 2, wherein the central region of the deformation-inducing region is provided in a region where the constricted portion exists in the longitudinal direction.

According to the absorbent article of aspect 3, the entire deformation-inducing region is arranged in the region of the constricted portion in the longitudinal direction. The constricted portion is easily deformed because the absorbent core itself is less present, and the presence of the entire deformation-inducing region in the region of the constricted portion makes it easier to raise the absorber.

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

According to the absorbent article of mode 4, the range in which the portion corresponding to the ridge of the protuberance that is convex on the skin side is formed is sufficiently long, and the formation of firmly protuberant protuberances can be promoted.

Aspect 5 is from Aspect 1, wherein the longitudinal ends of the central deformation-inducing portion are located inside the longitudinal outer ends of the central region of the deformation-inducing regions in the longitudinal direction. An absorbent article according to any one of aspects 4.

According to the absorbent article of mode 5, if the central deformation-inducing portion extends to the outside of the deformation-inducing region in the longitudinal direction, it becomes difficult to deform to form a raised portion such as a dome shape. By locating the central deformation-inducing portion on the inner side, it is possible to promote uplift deformation.

Aspect 6 is the absorbent article according to any one of Aspects 1 to 4, wherein the end regions of the deformation-inducing regions are provided in regions where the elastic members exist in the longitudinal direction. .

According to the absorbent article of aspect 6, since the end regions of the deformation-inducing regions are within the range of the stretchable member, contraction of the stretchable member facilitates deformation of the absorber with the deformation-inducing region as a deformation starting point.

Mode 7 has a pair of leak-proof wall portions on both sides in the width direction of the absorber, and the elastic member is provided on the pair of leak-proof wall portions and is fixed in an extended state in the longitudinal direction. 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 faces outward, the absorbent article is unfolded 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 absorption 7. The absorbent article according to any one of aspects 1 to 6, wherein the height of the body is lower than the height to the highest point.

According to the absorbent article of aspect 7, the leak-proof wall elastic member is prevented from coming into contact with the body first, and the protuberances are easily brought 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 stretchable member in the width direction. .

According to the absorbent article of aspect 8, the contraction of the stretchable member makes it easier for the central portion to bulge. , and the central portion can maintain a large degree of freedom of deformation. Therefore, when the absorbent body swells by absorbing liquid, the deformation of the absorbent body is easily allowed. If there is a shrinkage element in the central portion, the degree of freedom of deformation of the absorbent body is reduced, and the swelling of the absorbent body may appear in a convex shape on the skin-side surface, which may impair the fit.

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

According to the absorbent article of the ninth aspect, urine can be rapidly diffused inside the absorbent body, the accumulation of liquid on the surface of the absorbent body can be reduced, and leakage can be suppressed.

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

According to the absorbent article of aspect 10, urine can be rapidly diffused inside the absorbent body, and liquid accumulation on the surface of the absorbent body can be reduced, and leakage can be suppressed.

According to an eleventh aspect, the absorbent body has a pair of liquid diffusion guide portions extending along the longitudinal direction on both sides in the width direction on both one side and the other side in the longitudinal direction, and the deformation guide region The length in the longitudinal direction from the inner end to the outer end in the longitudinal direction of the deformation induction region is defined as a first length, and the first length from the outer end in the longitudinal direction of the deformation induction region is outside in the longitudinal direction When a certain position is defined as a reference position and a region from the longitudinal inner end of the deformation guidance region to the reference position in the longitudinal direction is defined as a predetermined region, the longitudinal direction of the pair of liquid diffusion guidance portions is The absorbent article according to any one of aspects 1 to 10, wherein each inner end is arranged within the predetermined region.

According to the absorbent article of aspect 11, compared to the case where the longitudinal inner ends of the pair of liquid diffusion guide portions are not arranged within the predetermined region, the longitudinal inner ends of the liquid diffusion guide portions are arranged in the predetermined region. Arranging it in the area makes it easier to guide the liquid accumulated around the valley of the formed protuberance to the front and back of the absorber. As a result, the entire surface of the absorber can be used for efficient absorption.

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

According to the absorbent article of aspect 12, the liquid absorbed in the central portion of the absorbent body is guided from the spaced apart portion of the pair of deformation-inducing regions to the ventral side and the dorsal side in the longitudinal direction, thereby extending the entire absorbent body. to prevent the liquid from accumulating in the troughs of the protuberances. As a result, the entire surface of the absorber can be used for efficient absorption.

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.

According to the absorbent article of 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 protruding toward the skin in the central region. It becomes easier to form a protuberance that has a shape.

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

According to the absorbent article of Aspect 14, the central portion is visually emphasized when in use due to the design applied to the central portion. The center position is a portion that protrudes toward the skin during use, and by emphasizing the protruding portion, it is possible to give the user an image of good fit and improved safety against leakage.

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

According to the absorbent article of 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 the dome-shaped raised portion of the absorbent body. Become.

In aspect 16, the absorbent body has an absorbent core, and the absorbent core has a constricted portion having a narrower width in the width direction than both ends in the longitudinal direction, The length in the longitudinal direction of the constricted portion is longer than the length in the longitudinal direction of the non-skin-side elastic member, and in the longitudinal direction, the non-skin-side elastic member is located within the region where the constricted portion is provided. 16. The absorbent article according to aspect 15, wherein

According to the absorbent article of aspect 16, the absorbent core has a wide width and high rigidity in the non-constricted portion. Compared to that, the constricted portion has low rigidity, and the non-skin-side elastic member (leg gathers) is entirely within the longitudinal range of the constricted portion, making it easier for the absorbent body to contract in the longitudinal direction. Therefore, it becomes easy to form a raised portion (dome shape), and leakage can be suppressed.

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

According to the absorbent article of mode 17, shrinkage in the lengthwise direction is facilitated by shrinking the portion where the absorbent core is not present, and it is further facilitated to form the raised portion of the absorbent body.

In an eighteenth aspect, the absorbent body has an absorbent core, and when the longitudinal direction is defined as the front-rear direction, the front side in the front-rear direction corresponds to the abdomen of the wearer, and the rear side in the front-rear direction is: A pair of front deformation-inducing 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, corresponding to the back side of the wearer. 18. The absorbent article according to any one of aspects 1 to 17, wherein each of the pair of front deformation-inducing portions has a front sloped portion that slopes from the front side to the rear side in the front-rear direction and from the outside to the inside in the width direction. is.

According to the absorbent article of aspect 18, when the wearer sits and stands, the outer absorbent core of the front deformation guide part is moved to the upper part of the inner absorbent core (skin surface side) in accordance with the movement of the wearer's legs. ). Leakage can be suppressed by bringing the absorbent core into close contact with the gap in the groin where leakage is likely to occur.

In a nineteenth aspect, each of the pair of front deformation induction portions has an inclination start point at which an inclination starts and an inclination end point at which the inclination ends and which is located on the rear side of the inclination start point, and a pair of When viewed in the thickness direction, a straight line connecting the inclination start point and the inclination end point on one side of the front inclined portion of 19. An absorbent article according to cross aspect 18.

According to the absorbent article of mode 19, the deformation-inducing force applied to the front inclined portion is easily transmitted to the deformation-inducing region, and the absorber is deformed convexly toward the skin surface starting from the deformation-inducing region. make it easier to As a result, the absorber can be brought into close contact to suppress leakage.

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

According to the absorbent article of mode 20, the constricted portion is likely to come into contact with the legs of the wearer, and by providing the front deformation guide portion along the constricted portion, the absorbent core outside the front deformation guide portion can be easily deformed so that the upper part of the inner absorbent core (skin side). As a result, leakage can be suppressed by bringing the absorbent core into close contact with the gap in the groin where leakage is likely to occur.

Aspect 21 is aspect 18, wherein the absorbent body has a front central deformation guide portion along the front-rear direction and serving as a deformation starting point between the pair of front deformation guide portions in the width direction. 20. The absorbent article according to 19 above.

According to the absorbent article of mode 21, the front center deformation guide portion is formed downwardly while deforming the outer absorber of the front deformation guide portion so as to come to the upper portion (skin surface side) of the inner absorber. By deforming to (non-skin surface side), it is possible to form a space on the front side while keeping the absorbent body in close contact with the gap in the groin where leakage is likely to occur. The space functions as a space for temporarily storing urine and can suppress groin leakage.

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

As shown in FIGS. 1A and 1B, a disposable diaper 101 has a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, and includes an absorbent body 110 containing a liquid-absorbent material such as pulp fibers, and an absorbent body 110. and a liquid-impermeable backsheet 140 covering the absorbent body 110 from the non-skin side. Moreover, as shown in FIG. 1A, the developed shape of the diaper 101 has a substantially hourglass shape having a longitudinal direction, a width direction, and a thickness direction. That is, the central portion 101m in the longitudinal direction is constricted in the width direction.

Here, the constricted portion 101m is the crotch portion 101m that is applied to the wearer's crotch, and the portion 101a that is on the abdomen side in the longitudinal direction from the crotch portion 101m is the front body that is applied to the wearer's lower abdomen. 101a, and the portion 101b on the back side in the longitudinal direction from the crotch portion 101m is the back body portion 101b that is applied to the buttocks of the wearer. Then, when the diaper 101 in the unfolded state is folded in two at the central position CL101 in the longitudinal direction, the ends 101ae2 and 101ae2 in the width direction of the front body 101a and the ends 101be2 and 101be2 in the width direction of the back body 101b. 101be2 are joined by welding or adhesion, respectively, so that one waist opening and two leg openings are formed to form the underpants-type 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 or the like as shown in FIG. That is, with the diaper 101 lowered, first, a used urine absorbing pad (not shown) attached to the skin side surface of the topsheet 130 of the diaper 101 is removed from the diaper 101 . Then, a new urine absorbing pad 1 prepared in advance is attached to the diaper 101. At this point, the new urine absorbing pad 1 is normally folded in half at a central position CL1 in the longitudinal direction as shown in FIG. It is folded. Therefore, when attaching to the diaper 101, first, the incontinence absorbing pad 1 is put into the diaper 101 with the same folding position CL1 at the top, and then the top sheet 130 of the diaper 101 is placed at the same folding position CL1. lightly press against the side of the skin. Next, the incontinence absorbing pad 1 in the folded state is opened on both sides in the longitudinal direction, whereby the incontinence absorbing pad 1 is unfolded into a plane, and the incontinence absorbing pad 1 in the unfolded state is placed on the surface sheet 130 of the diaper 101. Affix to the side of the skin. Such fixation is performed by, for example, engaging male members 81, 81 (FIG. 5) of hook-and-loop fasteners previously provided on the non-skin side of the urine absorbing pad 1 with the topsheet 130 of the diaper 101. As shown in FIG. Then, by pulling up the diaper 101 to the waist position 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 an unfolded and stretched 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 an unfolded and stretched state, viewed from the non-skin side.

As shown in FIG. 3, the urine absorbing pad 1 has a longitudinal direction, a width direction, and a thickness direction as three mutually orthogonal directions. A planar shape defined by the longitudinal direction and the width direction of the urine absorbing pad 1 is substantially rectangular as an example of a vertically long shape. However, it is not limited to this, and may have a substantially hourglass shape, for example.

In the following description, the side in contact with the user's body is also referred to as the "skin side", and the side in contact with the diaper 101 is also referred to as the "non-skin side" in the thickness direction. Also, the longitudinal direction is also referred to as the "front-rear direction", and the width direction is also referred to as the "left-right direction". When worn by the user, the front side in the longitudinal direction of the urine absorbing pad 1 faces the abdomen of the user, and the rear side faces the back of the user. The longitudinal dimension of the urine absorbing pad 1 is longer than the widthwise dimension, and the widthwise dimension is longer than the thicknesswise dimension.

The unfolded state of the urine absorbing pad 1 is a state in which the urine absorbing pad 1 is unfolded on a plane by opening the urine absorbing pad 1 in its longitudinal direction. Further, the "stretched state" of the urine absorbing pad 1 means a state in which the entire urine absorbing pad 1 (whole product) is stretched without wrinkles. The dimensions of the elastic members (leakage prevention wall elastic members 55, 55, non-skin side elastic members 57, etc.) are the same as or close to the dimensions of the individual members (i.e., the dimensions when the elastic members do not exhibit their elastic properties). It refers to the state in which it is stretched until it becomes

<About the basic configuration of the urine absorbing pad 1>
As shown in FIGS. 3, 4A to 4C, and 5, the urine absorbing pad 1 includes a liquid absorbent absorbent 10 that absorbs urine and a liquid permeable absorbent that covers the absorbent 10 from the skin side in the thickness direction. a topsheet 30, a liquid-impermeable backsheet 40 that covers the absorbent body 10 from the non-skin side, and leak-proof wall portions 52, 52 are formed at the widthwise ends 30e2, 30e2 of the topsheet 30. It has side seats 50, 50 for

In this embodiment, the absorber 10 has a two-layered structure in the thickness direction. That is, it has a first absorbent body 11 provided on the skin side in the thickness direction and a second absorbent body 21 provided adjacent to the non-skin side in the thickness direction of the first absorbent body 11 . . The absorbent body 10 having the two-layer structure will be described later.

The surface sheet 30 receives excreted urine, quickly sucks it in the thickness direction, and guides it to the absorbent body 10 . Then, as shown in FIGS. 3 and 4A to 4C, for example, a planar sheet capable of covering most of the skin side surface of the absorbent body 10 is used, and a substantially rectangular sheet is used here. Nonwoven fabrics such as air-through nonwoven fabrics and spunbond nonwoven fabrics are used as the material of the surface sheet 30, and thermoplastic resin fibers such as polyethylene and polyethylene terephthalate are used as constituent fibers of the nonwoven fabrics. However, a sheet made of a material other than this may be used as long as it has liquid permeability and flexibility to some extent.

The back sheet 40 is a leak-proof sheet that prevents urine leakage from the non-skin side of the urine absorbing pad 1 . As shown in FIG. 5, the planar shape of the backsheet 40 is substantially rectangular. The central portion protrudes outward from the absorbent body 10 in the width direction. In addition, 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 the backsheet 40, the widthwise edge portions 40ee2 and 40ee2 of the sheet 40 wrap around the skin side in the thickness direction. Thus, the edge portions 40ee2 and 40ee2 of the sheet 40 cover the edge portions 30ee2 and 30ee2 of the topsheet 30 in the width direction from the skin side. As the material of the back sheet 40, for example, a resin film such as a polyethylene film can be exemplified.

As shown in FIGS. 4A and 4B, the side sheet 50 is a sheet having leak-preventing walls 52, 52 formed at the widthwise ends 30e2, 30e2 of the top sheet 30, respectively. The leak-proof wall portion 52 prevents urine leakage in the width direction of the urine absorbing pad 1 . As shown in FIGS. 3, 4A, and 4B, the side sheets 50 are arranged so as to straddle both the widthwise end 30e2 of the topsheet 30 and the widthwise end 40e2 of the backsheet 40. While covering 30e2 and 40e2, the same end portions 30e2 and 40e2 are joined and fixed to the top sheet 30 and the back sheet 40 with an adhesive (not shown), respectively. A portion 50 b of the side sheet 50 that is fixed to the end portion 30 e 2 of the top sheet 30 serves as a base portion 50 b of the leakage preventing wall portion 52 . That is, the portion of the side sheet 50 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 top sheet 30, and the free end portion 50f has a longitudinally contracting portion. A possible leak-proof wall elastic member 55 (corresponding to a stretchable member) is fixed with an adhesive in a stretched state in the longitudinal direction. As the leak-proof wall elastic member 55, thread rubber or the like can be exemplified.

Due to the contraction of the leak-proof wall elastic member 55 in the longitudinal direction, the urine-absorbing pad 1 as a whole bends in the longitudinal direction so that the surface sheet 30 side faces the inner peripheral side. The contractile force applied from the wall elastic member 55 causes the free end portion 50f to contract in the longitudinal direction and stand up from the surface sheet 30 , thereby functioning as the leakproof wall portion 52 .

The material of the side sheet 50 may be exemplified by water-repellent SMS nonwoven fabric or the like. However, the sheet is not limited to this, and a sheet made of a material other than this may be used as long as it has flexibility to some extent.

<About 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 has a first absorbent body 11 containing a liquid absorbent material such as pulp fibers, and a second absorbent body 21 similarly containing a liquid absorbent material such as pulp fibers. As shown in FIGS. 3, 4A and 4B, the first absorbent body 11 and the second absorbent body 21 extend in the longitudinal direction and are deformed at central portions in both the longitudinal direction and the width direction, respectively. It has a central deformation guide portion 10S serving as a starting point. More specifically, the central deformation-inducing portion 10S is composed of a central deformation-inducing portion 11S of the first absorbent body 11 and a central deformation-inducing portion 21S of the second absorbent body 21, which will be described later. In this embodiment, the central deformation-inducing portion 10S is formed by a low basis weight portion 10S having a basis weight (g/m ² ) lower than the basis weight (g/m 2 ) of the liquid absorbent material in the area adjacent to it from the outside in the width direction. Here, the low grammage portion 10S is a portion with zero grammage, that is, a space, but is not limited to this. Moreover, the low basis weight portion 10S is preferably formed at a position corresponding to the urination point when the urine absorbing pad 1 is worn. The central deformation-inducing portion 10S (low basis weight portion 10S) enables rapid diffusion of urination into the interior of the absorbent body 10, reduces accumulation of liquid on the surface of the absorbent body 10, and suppresses leakage. can. Note that the central deformation guide portion 10S is not limited to being formed by the low basis weight portion, and may be, for example, a pressed portion (pressed groove) formed by embossing or the like. The 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 absorbent body 10 having a two-layer structure will be described in detail. The first absorbent body 11 has a first absorbent core 13 formed by molding a liquid absorbent material into a predetermined shape. As the first absorbent core 13, a mixture of liquid-absorbent fibers and liquid-absorbent granules as a liquid-absorbent material and formed into a predetermined shape can be exemplified. Here, pulp fibers are used as the liquid-absorbing fibers, and super-absorbent polymers (so-called SAP) are used as the liquid-absorbing granules, but the present invention is not limited to this. In addition, the liquid absorbent material may contain only one of the liquid absorbent fibers and the liquid absorbent granules, or in addition to or instead of either of the above two types of liquid absorbent 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, the width of which is narrower in the width direction than at both ends. The constricted portion 13c has a portion where the width in the width direction is the narrowest in the central portion of the core 13 in the longitudinal direction.

In addition, the first absorbent core 13 has the aforementioned central deformation-inducing portion 11S in its central portion. As described above, in this example, the basis weight of the central deformation guide portion 11S formed by the low basis weight portion is zero. It penetrates the sexual core 13.

The shape of the central deformation guide portion 11S viewed from the thickness direction is, as shown in FIG. 3, a vertically elongated shape in which the dimension 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 constricted portion 13c of the first absorbent core 13 to the rear side constriction start position 13cn is defined as the “constricted portion 13c. In the case of the term "region where the center deformation guide portion 11S exists", the central deformation-inducing portion 11S is provided in the region where the constricted portion 13c exists in the longitudinal direction.

In addition, 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 prevent collapse of the core 13 and maintain its outer shape. It is For example, in the present embodiment, by wrapping the core wrap sheet 15 in the width direction, the entire outer peripheral surface of the first absorbent core 13 is wrapped, and the joint of the core wrap sheet 15 is the first absorbent core. It is located on the non-skin side of the core 13 . However, it is not limited to this. For example, by wrapping the core wrap sheet 15 in the longitudinal direction, the entire outer peripheral surface of the first absorbent core 13 may be wrapped, or the joint may be located on the skin side of the first absorbent core 13. Also good. Further, the core wrap sheet 15 is not limited to tissue paper, and may be a sheet having liquid permeability and flexibility to some extent.

Also, the core wrap sheet 15 and the first absorbent core 13 are joined at least partially to each other with an adhesive such as a hot-melt adhesive. For example, the core wrap sheet 15 is preferably joined to the skin side of the first absorbent core 13 with an adhesive and also joined to the non-skin side of the core 13 with an adhesive. As a result, the first absorbent core 13 can easily transmit stress to the second absorbent body 21 via the core wrap sheet 15, and the width of the central deformation-inducing portion 11S of the first absorbent body 11 can be reduced. It is possible to prevent the portions 11cs, 11cs located on both sides of the direction from being displaced in the thickness direction.

The second absorbent body 21 shown in FIGS. 4A to 4C also has a second absorbent core 23 formed by molding a liquid absorbent material similar to that described above. Then, as shown in FIG. 3, the second absorbent core 23 is formed by laminating the above liquid absorbent materials in the thickness direction so that the shape of the second absorbent core 23 in plan view is vertically elongated and substantially hourglass shaped. It is That is, the second absorbent core 23 has a constricted portion 23c between both ends in the longitudinal direction, the width of which in the width direction is narrower than that of both ends. The constricted portion 23c has a portion where the width in the width direction is the narrowest in the central portion of the core 23 in the longitudinal direction.

Here, desirably, when the widthwise dimensions are compared at the same position in the longitudinal direction, 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 equal. For example, in the present embodiment, the widthwise dimension of the second absorbent core 23 is smaller than the minimum 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 does not protrude to both sides in the width direction more than the first absorbent core 13 . By doing so, 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 feeling of discomfort.

In addition, the second absorbent core 23 has the above-described central deformation guide portion 21S at the central portion in both the longitudinal direction and the width direction. As described above, in this example, the basis weight of the central deformation guide portion 21S formed by the low basis weight portion is zero. It penetrates the sexual core 23.

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

Further, as shown in FIG. 3, in the present embodiment, the longitudinal range from the front constriction start position 23cp of the constriction 23c of the second absorbent core 23 to the rear constriction start position 23cn is defined as the constriction 23c. In the case of the term "region where the center deformation guide portion 21S exists", the central deformation-inducing portion 21S is provided in the region where the constricted portion 23c exists in the longitudinal direction.

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

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 to prevent the core 23 from collapsing and maintain its outer shape. covered. For example, in the present embodiment, by wrapping the core wrap sheet 25 in the width direction, the entire outer peripheral surface of the second absorbent core 23 is wrapped, and the joint of the core wrap sheet 25 is the second absorbent core. 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. can be Further, the core wrap sheet 25 is not limited to tissue paper, and may be a sheet having liquid permeability and flexibility to some extent.

Also, the core wrap sheet 25 and the second absorbent core 23 are joined at least partially to each other with an adhesive such as a hot-melt adhesive. For example, the core wrap sheet 25 is preferably joined to the skin side of the second absorbent core 23 with an adhesive and also joined to the non-skin side of the core 23 with an adhesive.

By the way, as described above, the first absorbent body 11 is formed by covering the first absorbent core 13 with the core wrap sheet 15, and similarly, the second absorbent body 21 is also formed by wrapping the second absorbent core 23 It is covered with a sheet 25 . Therefore, an adhesive (not shown) that joins the first absorbent body 11 and the second absorbent body 21 is applied to at least one of the two core wrap sheets 15 and 25, and the adhesive The first absorbent body 11 and the second absorbent body 21 are bonded by bonding the two core wrap sheets 15 and 25 together with an agent.

The application pattern of the adhesive such as the hot-melt adhesive described above includes a stripe pattern in which a plurality of linear portions along the longitudinal direction are arranged in the width direction, and a plurality of spiral portions along the longitudinal direction. A spiral pattern or the like arranged in the width direction can be exemplified, but it is not limited to this.

Further, as described above, in FIGS. 4A to 4C, it has already been described that "the widthwise ends 40e2, 40e2 of the backsheet 40 are respectively covered with the sidesheets 50, 50." In this covered portion 40e2, a non-skin-side stretchable member 57 (equivalent to a stretchable member) that stretches in the longitudinal direction, such as thread rubber, is arranged along the longitudinal direction (Fig. 3). The member 57 is adhesively secured to both the backsheet 40 and the sidesheet 50 in a longitudinally stretched state. The position where the non-skin-side elastic member 57 is fixed is, as shown in FIG. This position corresponds to the position around the wearer's leg. Therefore, the contraction force of the non-skin-side elastic member 57 causes the back sheet 40 and the side sheets 50 to contract, so that so-called leg gathers are formed at the same positions. In other words, the non-skin-side elastic members 57 may be provided at both ends in the width direction of the urine absorbing pad 1 (absorbent article) and at least at the central portion in the longitudinal direction. In addition, as shown in FIGS. 4A and 4B , the non-skin-side elastic member 57 is arranged on the non-skin side with respect to the skin-side surface of the absorbent body 10 in the thickness direction.

In this embodiment, two non-skin-side stretchable members 57 (stretchable members) are provided on each side of the urine absorbing pad 1 in the width direction, but the number of non-skin-side stretchable members 57 is limited to this. No. In addition, the non-skin-side stretchable member 57 is not limited to rubber thread, and for example, a plurality of stretchable sheets may be arranged at intervals in the width direction, or a single stretchable sheet may be arranged. In addition, FIG. 3 shows only a part of each non-skin-side elastic member 57 exhibiting elasticity (a part with a so-called effective length). Therefore, the entire lengthwise portion of the illustrated non-skin-side elastic member 57 is the elastic region.

The absorbent body 10 (the first absorbent body 11 and the second absorbent body 21) has a pair of deformation-inducing regions 60 that are inclined from the widthwise end sides toward the widthwise center side. there is The deformation-guiding regions 60 are constituted, by way of example, here by compressed grooves formed by embossing. The pair of deformation-inducing regions 60 are regions where the rigidity of the absorbent body 10 is changed by such compression, and serve as starting points for deformation of the absorbent body 10 . In addition, in the present embodiment, the pair of deformation guiding regions 60 are provided on both one side (front side) and the other side (rear side) of the absorbent body 10 in the longitudinal direction. Then, the end regions 60et, 60et of the deformation-inducing region 60 located on the width-direction end side of the absorbent body 10 are positioned longitudinally inwardly of the width-direction center-side central regions 60ct, 60ct. 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 . The details of how the deformation-inducing region 60 promotes the deformation of the absorber 10 will be described later.

As shown in FIGS. 3 and 4C, in this embodiment, the absorbent body 10 is a pair of liquids obtained by squeezing both the first absorbent body 11 and the second absorbent body 21 together from the skin side in the thickness direction. It has diffusion guides 70 , 70 . The pair of liquid diffusion guide portions 70 extends along the longitudinal direction on both sides in the width direction of the absorbent body 10, and extends on both sides (front side) and the other side (rear side) in the longitudinal direction. is provided. The longitudinally outer ends of the pair of liquid diffusion guiding portions 70 extend to the longitudinally outer ends of the first absorbent body 11 and the second absorbent body 21 . 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 portion 70 . As a result, urine can be absorbed by the absorber 10 as a whole.

By the way, in an absorbent article that absorbs urine such as the urine absorbing pad 1, when the amount of incontinence increases due to aging or worsening of symptoms, it is difficult to use a product with increased thickness or a large size. It is also possible to improve the absorption capacity by However, such thicker or larger pads are difficult to deform according to the shape of the body and fit properly, resulting in a gap between the body and the pad that induces leakage. Sometimes I end up 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 that can sufficiently exhibit its absorbent performance.

In this regard, in the present embodiment, by encouraging deformation of the absorbent body 10 as follows, a gap is less likely to occur 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 incontinence pad 1 when attached to the diaper 101 and worn by the user. When the incontinence absorption pad 1 is worn, the contractile force of the non-skin-side elastic member 57 causes the back sheet 40 and the side sheets 50 to contract on the non-skin side of the incontinence absorption pad 1, forming so-called leg gathers. , a shrinkage force along the longitudinal direction is applied to the absorbent body 10 as well. The absorber 10 (the first absorber 11 and the second absorber 12) of the present embodiment has a central deformation guide portion 10S (11S, 21S), and a central portion 1C in the longitudinal direction of the absorber 10. , the dimension in the width direction of the second absorbent core 23 on the lower side (non-skin side) of the upper and lower two layers of absorbent bodies (first absorbent body 11 and second absorbent body 12) is the upper side (skin side) is smaller than the dimension in the width direction of the first absorbent core 13 (see FIGS. 3 and 4A). Similarly, in the central portion 1C in the longitudinal direction, the widthwise dimension of the central deformation guide portion 11S of the first absorbent body 11 is larger than the widthwise dimension of the central deformation guide portion 21S of the second absorbent body 21. (Fig. 4A). The central deformation-inducing portion 10S (11S, 21S) is a low basis weight portion having a basis weight of zero as described above, that is, a portion where the rigidity of the absorbent body 10 changes and promotes deformation of the absorbent body 10. FIG. When the incontinence absorbing pad 1 is worn, a wearer's crotch tightening force is applied from both sides in the width direction to the central portion 1C in the longitudinal direction of the incontinence absorbing pad 1, and this crotch tightening force acts on the absorber. 10 deforms starting from the central deformation guide portion 10S (11S, 21S). At that time, the dimensions in the width direction of the non-skin-side absorber (second absorber 21) and the non-skin-side central deformation-inducing portion 21S are the same as those of the skin-side absorber (first absorber 11) and the central deformation of the skin-side. Since they are each smaller than the dimension in the width direction of the guiding portions 11S, the absorber 10 is deformed so as to protrude toward the skin from the central deformation guiding portion 10S.

Due to the contraction of the non-skin-side elastic member 57 and the leak-proof wall elastic member 55, the contraction force along the longitudinal direction acts on the pair of deformation guide regions 60, 60, respectively, and along the pair of deformation guide regions 60, 60, , end portions in the longitudinal direction of the absorbent body 10 that deform convexly toward the skin side are defined. That is, convex deformation to the skin side is promoted with the pair of deformation guide regions 60, 60 as deformation starting points. As shown in FIG. 6, the absorber 10 has a central deformation-inducing portion 10S (11S, 21S) and a pair of deformation-inducing regions 60, 60 that protrude toward the skin in the central region corresponding to the crotch portion. A single large dome-shaped protuberance R having a shape is formed. The raised portion R allows the absorber 10 to be brought into close contact with the wearer's body over a wide area, and a gap is less likely to occur between the wearer's body and the urine absorbing pad 1 . As a result, leakage can be suppressed.

In the present embodiment, 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, respectively, so that the center portion 1C in the longitudinal direction is on the skin side. Although it becomes easier to form one large protruding ridge R, the pair of deformation guiding regions 60, 60 need 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 one side or at least one of the other sides in the longitudinal direction, the side on which the deformation guiding region 60 is provided has the deformation guiding regions 60, 60 where the rigidity changes as a starting point. As a result, the absorbent core 10 tends to be convex toward the skin.

The shape of the pair of deformation guiding regions 60, 60 is not limited to the shape in this embodiment. may be formed.

In addition, the lengthwise dimension of the protuberant portion R that protrudes toward the skin at the crotch portion when worn should be 50% or less of the lengthwise dimension of the first absorbent core 13 or the second absorbent core 23 . preferable. By having such a dimension, the raised portion R can be brought into close contact with the crotch portion of the wearer without excess or deficiency, and the body can be prevented from separating from the absorbent body 10 in the front-rear direction of the body. Leakage can be suppressed by making it difficult to create a gap with the take-up pad 1. - 特許庁

Further, when the absorber 10 is deformed at the time of wearing to form the raised portion R, the narrowest width in the width direction of the region of the absorbent body 10 forming the raised portion R is 75% of the lengthwise dimension of the raised portion R. % or less. With such a dimension of the protruding portion R, the protruding portion R can be accommodated in the crotch portion of the wearer just enough. As a result, it is possible to prevent the absorbent body 10 from separating from the body in the lateral direction of the body, and to make it difficult for a gap to form between the body and the urine absorbing pad 1.例文帳に追加

Moreover, in the longitudinal direction, at least part of the pair of deformation-inducing regions 60, 60 and the constricted portion 13c of the first absorbent core 13 (constricted portion 23c of the second absorbent core 23) may have a portion that overlaps. preferable. In this embodiment, the pair of deformation guiding regions 60, 60 overlaps 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-inducing regions 60, 60 serve as stiffness-changing regions, and along the deformation-inducing regions 60, 60, the absorber 10 defines longitudinal ends along which the absorber 10 deforms convexly toward the skin side. In the width direction that intersects with the longitudinal direction, it becomes easy to deform in the width direction due to the constricted portion 13c (23c). Due to the action of both the deformation guiding regions 60, 60 and the constricted portion 13c (23c), it becomes easier to form the three-dimensional raised portion R.

Further, as shown in FIG. 3, the longitudinal length L13c (L23c) of the constricted portion 13c (23c) is longer than the longitudinal length L57 of the non-skin-side elastic member 57. The non-skin-side stretchable member 57 is provided within a region where the constricted portion 13c (23c) is provided. The region where the constricted portion 13c (23c) is provided means the range in which the constricted portion 13c (23c) exists in the longitudinal direction. Each of the first absorbent core 13 and the second absorbent core 23 has a wide dimension in the width direction and high rigidity in the portions other than the constricted portions 13c and 23c. The rigidity of the constricted portions 13c and 23c is lower than that of portions other than the constricted portions 13c and 23c, and the entire non-skin-side elastic member 57 is present in the longitudinal direction within the range where the constricted portions 13c and 23c are provided. Therefore, the absorbent body 10 tends to shrink in the longitudinal direction. Therefore, it becomes easier to form the dome-shaped raised portion R.

Moreover, it is desirable that the widthwise outer ends of the non-skin-side stretchable member 57 do not overlap the first absorbent core 13 and the second absorbent core 23 in plan view. The term "outer end in the width direction of the non-skin-side elastic member 57" as used herein means the outer end in the width direction of the two non-skin-side elastic members 57, 57 provided on each side in the width direction. means the outer end in the width direction of the non-skin-side elastic member 57 on the other side. In addition, unlike the present embodiment, the non-skin-side elastic member 57 is, for example, provided with one belt-shaped (sheet-shaped) elastic member on each side in the width direction. means the end. 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 stretchable member 57, so that the urine absorbing pad 1 is more likely to contract in the longitudinal direction. , it becomes easier to form the raised portion R due to the deformation of the absorbent body 10 .

The urine absorbing pad 1 of this embodiment has the leak-proof wall elastic members 55 that constitute the leak-proof wall portion 52 and the non-skin-side stretchable members 57 that form the leg gathers. It is desirable that the stress of the non-skin-side elastic member 57 is larger than the stress of the leak-proof 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 provided non-skin-side elastic member 57 as a whole and the leak-proof wall elastic member 55 as a whole. means the stress of

Further, the end regions 60et, 60et of the pair of deformation-inducing 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-inducing 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 presence of the first absorbent core 13 (second absorbent core 23) is small in the constricted portion 13c (23c), the absorber 10 (11, 21) is easily deformed, and the raised portion R is easily formed. The existence of the end regions 60et, 60et of the deformation-inducing regions 60, 60, which are the starting points of the rigidity change in such regions, makes it easier to raise the absorber 10. As shown in FIG.

Further, in the present 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. Further, 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 in the region of the constricted portion 13c (23c) in the longitudinal direction. The constricted portion 13c (23c) is easily deformed because the first absorbent core 13 (second absorbent core 23) itself is less present, and the entire deformation-inducing region 60 exists in the region of the constricted portion 13c (23c). This makes it easier to raise the absorber 10 .

Further, in the present embodiment, as described above, the central deformation guide portion 10S is provided in the region where the constricted portion 13c (23c) exists in the longitudinal direction. If the central deformation guide portion 10S is longer than the constricted portion 13c (23c) in the longitudinal direction, it becomes difficult to deform the absorber 10 into a convex shape toward the skin within the range of the constricted portion 13c (23c). When 10S is within the range of the constricted portion 13c (23c), the absorber 10 is easily deformed 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 of the central deformation guide portion 10S in the longitudinal direction have portions overlapping the deformation guide region 60 in the longitudinal direction. The central deformation guide portion 10S becomes a portion corresponding to the ridge of the raised portion R when the absorber 10 is deformed to form the raised portion R at the time of wearing. Since such a central deformation guide portion 10S extends to a position overlapping with the deformation guide region 60 in the longitudinal direction, the range in which the portion corresponding to the ridge of the raised portion R projecting toward the skin side is formed. be long enough. Thereby, the formation of a firmly protruding protuberance R can be promoted. In the present embodiment, both the longitudinal ends 10Sea and 10Seb of the central deformation guide portion 10S have portions overlapping the deformation guide regions 60 and 60 in the longitudinal direction. At least one end of 10Sea and 10Seb may have a portion that overlaps the deformation guiding region 60 in the longitudinal direction.

Further, as shown in FIG. 3 , longitudinal ends 10Sea and 10Seb of the central deformation guide portion 10S are longitudinally inner than a longitudinal outer end 60se of a central region 60ct of the deformation guide region 60, respectively. located in If the central deformation-inducing portion 10S were provided outside the deformation-inducing region 60 in the longitudinal direction, the absorber 10 would deform into a dome-like protuberance when the urine absorbing pad 1 was worn. become difficult. However, by locating the central deformation guide portion 10S within the range in which the pair of deformation guide regions 60 exist in the longitudinal direction, it is possible to promote the dome-shaped raised deformation.

Moreover, 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 portion of each non-skin-side elastic member 57 that exhibits elasticity (a portion with a so-called effective length), and the non-skin-side elastic member 57 shown in FIG. indicates only the site 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 absorber 10 is easily deformed with the guiding region 60 as a deformation starting point.

FIG. 7 is a diagram for explaining a mode when the urine absorbing pad 1 in an unfolded state is placed on a horizontal surface under predetermined conditions. Here, in order to show the same deformed state of the absorbent body 10 as when the urine absorbing pad 1 is attached, the urine absorbing pad 1 is folded in half so that the skin-side surface of the urine absorbing pad 1 faces outward, and then the urine absorbing pad 1 is folded again. FIG. 7 shows part of the urine absorbing pad 1 in a state where the absorbing pad 1 is unfolded and placed on a horizontal surface with the non-skin side surface of the urine absorbing pad 1 facing downward. In this state, a raised portion R due to the deformation of the absorber 10 appears in the central portion 1C of the urine absorbing pad 1 in the longitudinal direction. H2 is the height from the horizontal plane of the absorber 10 to the highest point P2 at which the leakage preventing wall elastic member 55 is highest, and the height from the horizontal plane to the highest point P1 at which the absorber 10 is highest. Assuming H1, the height H2 is lower than the height H1 (H1>H2). By deforming in this manner, the leak-proof wall elastic member 55 is prevented from coming into contact with the wearer's body in advance, and the protuberance R easily comes 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 the upward deformation of the central portion in the longitudinal direction and the width direction of the absorbent body 10, the inner side in the width direction of the non-skin-side elastic members 57 and 57 and the leak-proof wall elastic member 55 should be provided in the longitudinal direction. Desirably, no other contraction elements are provided to contract along. In this embodiment, contraction of the non-skin-side elastic members 57, 57 and the leak-proof wall elastic member 55 promotes the uplift of the absorbent body 10 in the central portion in the longitudinal direction and the width direction, but shrinks in the central portion in the width direction. Since there is no contraction element to force the contraction force, the contraction force does not directly reach the central portion in the width direction of the absorbent body 10, and the central portion can maintain a large degree of freedom of deformation. Therefore, when the absorbent body 10 absorbs liquid such as urine and swells, the deformation of the absorbent body 10 is easily allowed. On the other hand, if there is a shrinkage element in the central portion in the width direction of the urine absorbing pad 1, the degree of freedom of deformation of the absorbent body 10 is reduced, and the swelling of the absorbent body 10 appears in a convex shape on the skin side surface, resulting in poor fit. There is a risk of loss of quality.

FIG. 8 is a schematic plan view of part of the urine absorbing pad 1 in an unfolded and stretched state, viewed from the skin side. In FIG. 8, the longitudinal length from the longitudinal inner end 60ie to the outer end 60se of the deformation guiding region 60 of the absorber 10 is defined as the first length N, and from the longitudinal outer end 60se of the deformation guiding region 60 A position outside the longitudinal direction by the first length N is defined as a reference position KP, and a region from the longitudinal inner end 60ie of the deformation guiding region 60 to the reference position KP is defined as a predetermined region X in the longitudinal direction. Here, the pair of liquid diffusion guide portions 70, 70 provided in the absorbent body 10 are such that the longitudinal inner ends 70ie, 70ie of the pair of liquid diffusion guide portions 70 are located within the predetermined region X described above. is preferably arranged. Compared to the case where the longitudinal inner ends 70ie, 70ie of the pair of liquid diffusion guide portions 70, 70 are not arranged within the predetermined region X, the longitudinal inner ends 70ie, 70ie of the liquid diffusion guide portions 70, 70 are Placement within the predetermined region X guides urine accumulated around the troughs of the ridges R to be formed (near the longitudinal outer sides of the pair of deformation-inducing regions 60) to the front and rear sides of the absorbent body 10. easier. Thereby, the entire surface of the absorbent body 10 can be used for efficient absorption.

Returning to FIG. 3, in the present embodiment, the pair of deformation-inducing regions 60, 60 have longitudinal ends 60se, 60se of central regions 60ct, 60ct separated in the width direction. With such a configuration, the urine absorbed in the central portion in the longitudinal direction and the width direction of the absorbent body 10 is guided to the ventral side and the dorsal side in the longitudinal direction from the spaced apart portion of the pair of deformation-inducing regions 60, 60 and absorbed. 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. - 特許庁

In the present embodiment, the longitudinal ends 60se, 60se of the central regions 60ct, 60ct of the pair of deformation-inducing regions 60, 60 are spaced apart in the width direction. , the longitudinal ends 60se, 60se of may be connected without being separated from each other. 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, 60se of the central regions 60ct, 60ct are connected, the longitudinal ends of the convex deformation of the absorber 10 can be defined.

Further, as shown in FIGS. 3, 4A, and 4B, the urine absorbing pad 1 of this embodiment has a design visible from the skin side of the urine absorbing pad 1 at least in the center in the longitudinal and width directions. The design is applied to the design sheet 33ds, and the design sheet 33ds is arranged between the topsheet 30 and the first absorbent body 11. As shown in FIG. As shown in FIG. 3, the design sheet 33ds of this embodiment has a grid pattern. With such a design applied to the central portion of the urine absorbing pad 1, the central portion is visually emphasized during use. The position where the design is applied is the part that protrudes on the skin side during use, and by emphasizing the part that becomes the protruding part (R), it gives the user a good fit and improved safety against leakage. can give you an image.

=== Second Embodiment ===
As an absorbent article according to the second embodiment of the present invention, an underpants-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 according to the second embodiment. FIG. 10 is a plan view of diaper 200 in an unfolded and stretched condition. 11 is a schematic cross-sectional view taken along line CC of FIG. 10. FIG. 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 having an underpants-type shape in a natural state, and in the underpants-type state of 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. In addition, the front side in the front-rear direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's dorsal side. 10, the diaper 200 has a "longitudinal direction" and a "width direction" that intersect each other. The longitudinal direction in the unfolded state of FIG. 10 is the direction along the vertical direction in the underpants-type state of FIG. The width direction in the unfolded state is the same direction as the left-right direction in the underpants-type state. Also, as shown in FIG. 11, the direction in which the materials forming the diaper 200 are laminated is defined as the "thickness direction." As in the first embodiment, the side in the thickness direction that contacts the wearer's skin is the skin side, and the opposite side is the non-skin side.

The diaper 200 has an absorbent body 210 (hereinafter also referred to as “absorbent body 210 ”) and a waist member 220 arranged on the non-skin side of the absorbent body 210 . The waist member 220 is an exterior member that constitutes the exterior of the diaper 200 .

From the unfolded state of FIG. 10, the absorbent main body 210 and the waist member 220 are folded in half with the central position CL in the longitudinal direction as the folding position. The front portion of the waist member 220 and the rear portion of the waist member 220 facing each other in this folded state are joined and connected to each other at both sides in the width direction (left and right direction) to form a pair of side joint portions 220s, 220s are formed. That is, the front portion of the waist member 220 and the rear portion of the waist member 220 are annularly formed by the pair of side joint portions 220s, 220s. The side joints 220s are formed by known joining means such as welding and adhesion. As a result, a pants-type diaper 200 having a waist opening BH and a pair of leg openings LH, LH as shown in FIG. 9 is obtained.

In this embodiment, as shown in FIG. 10, a portion of the waist member 220 that overlaps the side joints 220s formed on the front side in the longitudinal direction is called a "front waist part 230". The front waist portion 230 is a portion located on the abdomen side of the wearer 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 called 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. A portion positioned between the front waistline portion 230 and the rear waistline portion 240 in the longitudinal direction is called a "crotch portion CA". The crotch portion CA is a portion positioned between the wearer's crotch when the diaper 200 is worn.

(Absorptive main body (absorbent body) 210)
12A is a plan view of the absorbent body 210, and FIG. 12B is a schematic cross-sectional view taken along line DD of FIG. 12A. The absorbent main body 210 includes an absorbent core 213 that absorbs bodily fluids, a surface sheet 216 that is arranged closer to the skin in the thickness direction than the absorbent core 213, and a non-skin side that is arranged relative to the absorbent core 213. and a back sheet 217 . However, the absorbent main body 210 may be provided with sheet members other than this. For example, a second sheet (not shown) may be provided between the surface 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 absorbent cores (the first absorbent core 13, the second absorbent core 23) and the topsheet 30 in the urine absorbing pad 1 of the first embodiment. , and the back sheet 40, respectively. The absorbent core 213 is covered with a core wrap sheet 215 made of tissue paper, for example, in order to prevent the core 213 from collapsing and maintain its outer shape. The absorbent core 213 of this embodiment has a constricted portion 213c between both ends in the longitudinal direction, the width of which in the width direction is narrower than that of both ends. The constricted portion 213c has a portion where the width in the width direction is the narrowest in the central portion of the core 213 in the longitudinal direction. Also, the absorbent core 213 is provided with a central deformation guide portion 10S' and a pair of deformation guide regions 60', 60' similar to the urine absorbing pad diaper 1 of the first embodiment.

In this embodiment, the top sheet 216 is folded back on both sides in the width direction (left-right direction) so as to involve the absorbent core 213 as shown in FIG. 12B. A pair of leak-proof 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 portion 252 is formed of a leak-proof wall sheet 250 (FIG. 12B). A leak-proof wall elastic member 255 (equivalent to a stretchable 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 portion 252 in a state that it is stretched in the longitudinal direction and fixed. 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 of the leak-proof wall elastic member 255 and fits the crotch portion of the wearer.

(Waist circumference member 220)
As shown in FIG. 11, the waist member 220 includes a skin-side sheet 221 arranged on the skin side in the thickness direction, and a non-skin-side sheet 232 laminated so as to be adjacent to the non-skin side of the skin-side sheet 221. (front side) and a non-skin side sheet 242 (back side).

The front waist portion 230 has a skin-side sheet 221, a non-skin-side sheet 232, and a waist elastic member 235 provided between them in the thickness direction. The skin-side sheet 221 is a sheet member continuous from the front waistline portion 230 to the rear waistline 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 of the non-skin side sheet 232 (the front end in the front-back direction) is folded back from the non-skin side to the skin side and from the front side to the rear side in the front-back direction to form a folded portion 232f. However, the folded portion 232f may not necessarily be provided.

The waist elastic members 235 are made of thread rubber or the like, and are arranged in a plurality vertically spaced apart between the skin-side sheet 221 and the non-skin-side sheet 232, and are attached while being stretched in the width direction. It is Due to the stretchability exhibited by the waist elastic member 235, the front waist portion 230 fits around the wearer's abdominal waist.

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

Of the waist member 220 , the rear waist portion 240 has substantially the same configuration as the front waist member 230 . That is, the back waist portion 420 includes the skin side sheet 221 arranged on the skin side in the thickness direction, the non-skin side sheet 242 laminated on the non-skin side of the skin side sheet 221, the skin side sheet 221 and the non-skin side sheet 221. A waist elastic member 245 is provided between the skin side sheet 242 and the skin side sheet 242 in the thickness direction.

The appearance shape of the waist member 220 is partially different between the front side and the rear side in the front-rear direction. Further, as shown in FIG. 10, a substantially trapezoidal buttocks cover 246 is provided in a region (crotch portion CA) below the side joint portions 220s of the rear waist portion 240 in the vertical direction. The buttock cover 246 is formed by laminating the skin-side sheet 221 of the rear waist portion 240 from the non-skin side, and the width in the horizontal direction narrows 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 buttocks cover 246 is provided with leg elastic members 247 such as rubber thread as shown in FIGS. 10 and 11 . The leg elastic members 247 are attached between the skin-side sheet 221 and the buttock cover 246 in a stretched state along the outer edge of the buttock cover 246 (that is, part of the peripheral edge of the leg opening LH). When the diaper 200 is worn, the buttock cover 246 easily fits the wearer's buttocks and is less likely to roll up from the buttocks due to the stretchability exhibited by the leg-surrounding elastic members 247 .

(Front side deformation guide portion 280)
In the second embodiment, as shown in FIG. 12A, a front deformation guide portion 280 that guides the absorptive core 213 to deform in the thickness direction is located forward of the central position (CL) in the longitudinal direction in the width direction. A pair is provided. The front deformation guide portion 280 is a low basis weight portion having 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 starting point for bending and guides the absorbent core 213 to deform in the thickness direction.

In addition, the front deformation induction part 280 is not limited to the low basis weight part as described above. It may be a high-rigidity portion. Alternatively, a predetermined portion of the absorbent core 213 may be bent to facilitate bending deformation, or another configuration may be used.

FIG. 13 is a partially enlarged view of the absorbent main body 210 explaining the arrangement of the front deformation guide portion 280. FIG. In the diaper 200, each of the pair of front deformation guide portions 280 has a front sloped portion 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 portion 280 of the present embodiment is inclined 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. is.

Further, the point at which the forward deformation guide portion 280 starts to tilt is defined as a tilt start point 280as, and the point at which the tilt ends and which is positioned behind the tilt start point 280as is defined as a tilt end point 280ae. The front sloped 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 curved shape. Further, the front deformation guide portion 280 may have a linear portion extending in 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 induction part 280 is positioned along the groin of the wearer, and the front deformation guide part 280 is deformed according to the movement of the wearer's legs in sitting and standing positions. The outer absorbent core 213 of the guiding part 280 can be deformed so as to come to the upper part (skin surface side) of the inner absorbent core 213 . As a result, the absorbent core 213 can be brought into close contact with the gap in the groin where leakage is likely to occur, and leakage can be suppressed.

In addition, as shown in FIG. 13, a straight line connecting an inclination start point 280as and an inclination end point 280ae on one side (here, the right side) of the pair of front side inclined portions 280a or an extension line ET280 thereof extends in the thickness direction. It intersects one of the pair of deformation guiding regions 60', 60' when viewed (in a so-called planar view). With such a configuration, the deformation-inducing force applied to the front inclined portion 280a is easily transmitted to the deformation-inducing region 60', and the absorbent main body (absorbent body) 210 is moved from the deformation-inducing region 60' as a starting point. It becomes easy to transform into a convex shape on the surface side. This makes it easier to bring the absorbent main body (absorbent body) 210 into close contact.

Moreover, 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 portion that is likely to come into contact with the legs of the wearer. It is easy to deform so as to come to the upper part of 213 (skin surface side). With such a configuration, leakage can be suppressed by bringing the absorbent core 213 into close contact with the gap in the groin where leakage is likely to occur.

Also in the second embodiment, similarly to the first embodiment, when the diaper 200 is put on, the absorber 210 of the diaper 200 moves from the central deformation guide portion 10' and the pair of deformation guide regions 60', 60' as starting points. It deforms so that it becomes convex on the skin side. Specifically, when the diaper 200 is put on, both sides in the width direction of the absorbent body 210 are pulled up while contacting the legs of the wearer, so that the central deformation-inducing part 10S′ first contacts the crotch part. At this time, the absorber 210 deforms so as to protrude toward the skin from the central deformation-inducing portion 10' and the pair of deformation-inducing regions 60', 60'. In addition, the deformation guiding regions 60′, 60′ provided on both one side (front side) and the other side (rear side) in the longitudinal direction, respectively, are the longitudinal direction of the convex deformation of the absorbent body 10 toward the skin side. The end portion is defined, that is, the absorber 210 has one large dome-shaped protuberance (not shown) that protrudes toward the skin in the central region corresponding to the crotch portion, as in the first embodiment. It is formed. By deformation along the groin starting from the raised portion and the front deformation-inducing portion 280, the absorber 210 can be brought into close contact with the wearer's body over a wide area, and the body and the diaper 200 can be brought into close contact with each other. A gap is less likely to occur between 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 leak-proof wall elastic member 255 (elastic member) in the width direction. preferably not. Since there is no contraction element for contraction in the central portion in the width direction, the contractile force does not directly reach the central portion in the width direction of the absorbent body 210, and the central portion can maintain a large degree of freedom of deformation, and liquid such as urine can be absorbed. When the absorbent body 210 swells due to absorption, the deformation of the absorbent body 210 is easily allowed.

FIG. 14 is a modification of the diaper 200. FIG. As shown in FIG. 14, the absorbent main body (absorbent body) 210 further includes a pair of front deformation guide portions 280, 280 in the width direction along the front-rear direction (longitudinal direction) and as a deformation starting point. It has a front side central deformation guide portion 285 that is formed as follows. The front central deformation guide portion 285 may be formed, for example, by compressed grooves formed by embossing. The front central deformation-inducing portion 285 is a region where the rigidity of the absorbent main body (absorbent body) 210 is changed by such compression, and serves as a starting point for deformation of the absorbent body 210 . Note that the front central deformation-inducing portion 285 is not limited to the compressed groove, and is formed by, for example, 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. may While deforming the outer absorbent body 210 of the front deformation induction part 280 so as to come to the upper part (skin surface side) of the inner absorbent body 210, the front central deformation induction part 285 is deformed downward (non-skin surface side). Thus, a space can be formed on the front side while keeping the absorbent body 210 in close contact with the gap in the groin where leakage is likely to occur. The space functions as a space for temporarily storing urine and can suppress groin leakage.

===Others===
The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. It goes without saying that the present invention can be modified and improved without departing from its spirit, and that equivalents thereof are included in the present invention.

In the first embodiment, the urine absorbing pad 1 is used as an example of the absorbent article, but the absorbent article is not limited to this. 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 guide portion 10S is provided on both the first absorbent body 11 and the second absorbent body 21, but the present invention is not limited to this. The low basis weight portion 10S may be provided at least in the first absorbent body 11. As shown in FIG. Since the first absorbent body 11 located closer to the skin in the thickness direction than the second absorbent body 21 is provided with the low basis weight portion 10S, urine can be rapidly diffused into the absorbent body 10. , the accumulation of liquid on the surface of the absorbent body 10 can be reduced, and leakage can be suppressed.

In the second embodiment, the absorbent main body (absorbent body) 210 has the front central deformation guide portion 285, but the length thereof is longer than the deformation guide regions 60', 60' on the other side (rear side) in the longitudinal direction. It may further have a rear central deformation guide portion on the outside (rear side) of the direction. As a result, it is possible to promote deformation of the absorbent core 213 in the thickness direction along the wearer's buttocks starting from the rear central deformation-inducing portion on the rear side of the absorbent body 210 in the longitudinal direction.

1 urine absorption pad (absorbent article)
1C central portion 10 absorber 10S central deformation induction portion (low basis weight portion)
10S' central deformation induction portion 10Sea front end portion 10Seb rear end portion 11 first absorbent body 11cs portion 11S central deformation induction portion 12 second absorbent body 13 first absorbent core 13c constriction portion 13cn constriction start position 13cp constriction start position 15 Core wrap sheet 21 Second absorbent body 21S Central deformation induction part 23 Second absorbent core 23c Narrowed part 23cn Narrowed start position 23cp Narrowed start position 23ee Edge 25 Core wrap sheet 30 Surface sheet 30e2 Edge 30ee2 Edge 33ds Design sheet 40 back sheet 40e2 edge 40ee2 edge 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 (extendable member)
57 non-skin side elastic member (elastic member)
60 deformation guide region 60' deformation guide region 60ct central region 60et end region 60ie longitudinal inner end 60se longitudinal outer end 70 liquid diffusion guide portion 70ie longitudinal inner end 81 male member 101 of fastener diaper (disposable diaper)
101a front body 101ae2 end 101b back body 101be2 end 101m longitudinal center (crotch)
110 Absorbent body 130 Topsheet 140 Backsheet 200 Pants-type disposable diaper 210 Absorbent 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 buttocks cover 247 leg elastic member 250 leak-proof wall sheet 252 leak-proof wall portion 255 leak-proof wall elastic member (elastic member)
280 front side deformation guide portion 280a front side slope portion 280as slope start point 280ae slope end point 285 front side central deformation guide portion BH waist opening CA crotch portion LH leg opening ET280 extension line

Claims (20)

An absorbent article for absorbing urine, having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in an unfolded state, and comprising a liquid-absorbent absorbent body,
The absorbent body has a central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point at a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation induction regions that are provided so as to be inclined from the widthwise end sides toward the widthwise central side,
In the deformation-inducing region, an end region of the deformation-inducing region positioned on the end side in the width direction of the absorber is positioned inside in the longitudinal direction of a center region on the center side in the width direction. ,
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 at the central portion in the longitudinal direction,
The pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction,
The absorbent body has an absorbent core,
The absorptive core has a constricted portion having a narrower width in the width direction than the both ends between the longitudinal ends,
The pair of deformation guiding regions provided on one side in the longitudinal direction are defined as a pair of deformation guiding regions on one side, and the pair of deformation guiding regions provided on the other side in the longitudinal direction are defined as a pair of deformation guiding regions on the other side. When the inductive region is
In the longitudinal direction, at least a portion of the one-side deformation-inducing region and the constricted portion have an overlapping portion,
In the longitudinal direction, at least a portion of the other-side deformation-inducing region and the constricted portion have an overlapping portion,
After folding the absorbent article in two so that the skin-side surface of the unfolded absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. It is configured such that, in a state where it is left standing still, a protruding portion is formed on the skin side in a region corresponding to the crotch portion,
The one-side deformation-inducing region is a deformation starting point of the protuberance on the one side,
the other side deformation guiding region is a deformation starting point of the protuberance on the other side;
The absorbent body has a first absorbent body and a second absorbent body provided on the non-skin side in the thickness direction of the first absorbent body,
The first absorbent body and the second absorbent body have the central deformation induction part,
In the central portion of the absorbent body in the longitudinal direction, the widthwise dimension of the absorbent core of the second absorbent body is smaller than the widthwise dimension of the absorbent core of the first absorbent body,
In the central portion of the absorbent body in the longitudinal direction, the widthwise dimension of the central deformation-inducing portion of the first absorbent body is larger than the widthwise dimension of the central deformation-inducing portion of the second absorbent body.
An absorbent article characterized by: The absorbent article according to claim 1,
The central region of the one-side deformation-inducing region and the central region of the other-side deformation-inducing region are provided in a region where the constricted portion exists in the longitudinal direction. absorbent article. The absorbent article according to claim 1 or 2,
The absorbent article, wherein at least one longitudinal end of the central deformation-inducing portion has a portion overlapping with the one-side deformation-inducing region in the longitudinal direction. The absorbent article according to claim 1 or 2,
The longitudinal end portion of the central deformation-inducing portion is located inside in the longitudinal direction the longitudinal outer end of the central region of the one-side deformation-inducing region. absorbent article. The absorbent article according to claim 4,
The absorbent article, wherein the central deformation-inducing portion is separated from the one-side deformation-inducing region and the other-side deformation-inducing region. The absorbent article according to claim 1 or 2,
The absorbent article, wherein the end region of the one-side deformation-inducing region is provided in a region where the stretchable member exists in the longitudinal direction. The absorbent article according to claim 1 or 2,
Having a pair of leakage preventing walls on both sides of the absorbent body in the width direction,
The stretchable member is a leak-proof wall elastic member that is fixed in an extended state in the longitudinal direction and contractible in the longitudinal direction, provided in the pair of leak-proof wall portions,
After folding the absorbent article in two so that the skin-side surface of the absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. In a still 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,
The absorbent article is characterized in that no other shrinkage element that shrinks along the longitudinal direction is provided inside the stretchable member in the width direction. The absorbent article according to claim 1 or 2,
The absorbent article, wherein the central deformation-inducing 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 article, wherein the low basis weight portion is provided at least in the first absorbent body. An absorbent article for absorbing urine, having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in an unfolded state, and comprising a liquid-absorbent absorbent body,
The absorbent body has a central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point at a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation induction regions that are provided so as to be inclined from the widthwise end sides toward the widthwise central side,
In the deformation-inducing region, an end region of the deformation-inducing region positioned on the end side in the width direction of the absorber is positioned inside in the longitudinal direction of a center region on the center side in the width direction. ,
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 at the central portion in the longitudinal direction,
The pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction,
The absorbent body has an absorbent core,
The absorptive core has a constricted portion having a narrower width in the width direction than the both ends between the longitudinal ends,
The pair of deformation guiding regions provided on one side in the longitudinal direction are defined as a pair of deformation guiding regions on one side, and the pair of deformation guiding regions provided on the other side in the longitudinal direction are defined as a pair of deformation guiding regions on the other side. When the inductive region is
In the longitudinal direction, at least a portion of the one-side deformation-inducing region and the constricted portion have an overlapping portion,
In the longitudinal direction, at least a portion of the other-side deformation-inducing region and the constricted portion have an overlapping portion,
After folding the absorbent article in two so that the skin-side surface of the unfolded absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. It is configured such that, in a state where it is left standing still, a protruding portion is formed on the skin side in a region corresponding to the crotch portion,
The one-side deformation-inducing region is a deformation starting point of the protuberance on the one side,
the other side deformation guiding region is a deformation starting point of the protuberance on the other side;
The absorbent body has a pair of liquid diffusion guiding portions extending along the longitudinal direction on both sides in the width direction on both one side and the other side in the longitudinal direction,
The longitudinal length from the longitudinal inner end to the longitudinal outer end of the one side deformation guiding region is defined as a first length, and the longitudinal direction length from the longitudinal direction outer end of the one side deformation guiding region is the first length. When a position outside the longitudinal direction by a distance of 10 mm is defined as a reference position, and a region from the inner end of the one-side deformation induction region in the longitudinal direction to the reference position in the longitudinal direction is defined as a predetermined region,
The absorbent article, wherein the inner ends in the longitudinal direction of the pair of liquid diffusion guide portions are respectively arranged within the predetermined region. The absorbent article according to claim 1 or 2,
In the pair of one-side deformation guiding regions, the ends in the longitudinal direction of the central region are spaced apart in the width direction,
In the pair of other-side deformation guiding regions, the ends in the longitudinal direction of the central region are spaced apart in the width direction,
An absorbent article characterized by: The absorbent article according to claim 1 or 2,
An absorbent article characterized by having a design visible from the skin side of the absorbent article at least in 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 arranged on the non-skin side of the skin-side surface of the absorbent body in the thickness direction. An absorbent article according to claim 14 ,
The longitudinal length of the constricted portion is longer than the longitudinal length of the non-skin-side elastic member,
The absorbent article, wherein the non-skin-side stretchable member is provided in a region in which the constricted portion is provided in the longitudinal direction. The absorbent article according to claim 15 ,
The absorbent article, wherein the widthwise outer end of the non-skin-side elastic member does not overlap the absorbent core in a plan view. The absorbent article according to claim 1 or 2,
When the longitudinal direction is the front-back direction, the front side in the front-back direction corresponds to the abdomen of the wearer, and the rear side in the front-back direction corresponds to the back of the wearer,
A pair of front deformation induction 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-inducing portions has a front sloped portion that slopes from the front side to the rear side in the front-rear direction and from the outside to the inside in the width direction. 18. The absorbent article according to claim 17 ,
Each of the pair of front deformation guide parts has a tilt start point at which the tilt starts and a tilt end point at which the tilt ends and which is positioned behind the tilt start point, and
A straight line connecting the inclination start point and the inclination end point on one side of the pair of front side inclined portions, or an extension line thereof, is one of the pair of one side deformation induction regions when viewed in the thickness direction. An absorbent article characterized in that it intersects with one of An absorbent article for absorbing urine, having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in an unfolded state, and comprising a liquid-absorbent absorbent body,
The absorbent body has a central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point at a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation induction regions that are provided so as to be inclined from the widthwise end sides toward the widthwise central side,
In the deformation-inducing region, an end region of the deformation-inducing region positioned on the end side in the width direction of the absorber is positioned inside in the longitudinal direction of a center region on the center side in the width direction. ,
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 at the central portion in the longitudinal direction,
The pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction,
The absorbent body has an absorbent core,
The absorptive core has a constricted portion having a narrower width in the width direction than the both ends between the longitudinal ends,
The pair of deformation guiding regions provided on one side in the longitudinal direction are defined as a pair of deformation guiding regions on one side, and the pair of deformation guiding regions provided on the other side in the longitudinal direction are defined as a pair of deformation guiding regions on the other side. When the inductive region is
In the longitudinal direction, at least a portion of the one-side deformation-inducing region and the constricted portion have an overlapping portion,
In the longitudinal direction, at least a portion of the other-side deformation-inducing region and the constricted portion have an overlapping portion,
After folding the absorbent article in two so that the skin-side surface of the unfolded absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. It is configured such that, in a state where it is left standing still, a protruding portion is formed on the skin side in a region corresponding to the crotch portion,
The one-side deformation-inducing region is a deformation starting point of the protuberance on the one side,
the other side deformation guiding region is a deformation starting point of the protuberance on the other side;
When the longitudinal direction is the front-back direction, the front side in the front-back direction corresponds to the abdomen of the wearer, and the rear side in the front-back direction corresponds to the back of the wearer,
A pair of front deformation induction 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,
each of the pair of front deformation-inducing portions has a front sloped portion that slopes from the front side to the rear side in the front-rear direction and from the outside to the inside in the width direction;
An absorbent article, comprising a portion where the front deformation-inducing portion and the constricted portion overlap in the longitudinal direction. An absorbent article for absorbing urine, having a longitudinal direction, a width direction, and a thickness direction that intersect with each other in an unfolded state, and comprising a liquid-absorbent absorbent body,
The absorbent body has a central deformation-inducing portion extending in the longitudinal direction and serving as a deformation starting point at a central portion in both the longitudinal direction and the width direction,
The absorbent body has a pair of deformation induction regions that are provided so as to be inclined from the widthwise end sides toward the widthwise central side,
In the deformation-inducing region, an end region of the deformation-inducing region positioned on the end side in the width direction of the absorber is positioned inside in the longitudinal direction of a center region on the center side in the width direction. ,
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 at the central portion in the longitudinal direction,
The pair of deformation guiding regions are provided on both one side and the other side in the longitudinal direction,
The absorbent body has an absorbent core,
The absorptive core has a constricted portion having a narrower width in the width direction than the both ends between the longitudinal ends,
The pair of deformation guiding regions provided on one side in the longitudinal direction are defined as a pair of deformation guiding regions on one side, and the pair of deformation guiding regions provided on the other side in the longitudinal direction are defined as a pair of deformation guiding regions on the other side. When the inductive region is
In the longitudinal direction, at least a portion of the one-side deformation-inducing region and the constricted portion have an overlapping portion,
In the longitudinal direction, at least a portion of the other-side deformation-inducing region and the constricted portion have an overlapping portion,
After folding the absorbent article in two so that the skin-side surface of the unfolded absorbent article faces the outside, the absorbent article is unfolded again and placed on a horizontal plane with the non-skin-side surface of the absorbent article facing downward. It is configured such that, in a state where it is left standing still, a protruding portion is formed on the skin side in a region corresponding to the crotch portion,
The one-side deformation-inducing region is a deformation starting point of the protuberance on the one side,
the other side deformation guiding region is a deformation starting point of the protuberance on the other side;
When the longitudinal direction is the front-back direction, the front side in the front-back direction corresponds to the abdomen of the wearer, and the rear side in the front-back direction corresponds to the back of the wearer,
A pair of front deformation induction 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,
each of the pair of front deformation-inducing portions has a front sloped portion that slopes from the front side to the rear side in the front-rear direction and from the outside to the inside in the width direction;
The absorbent body has a front central deformation guide portion along the front-rear direction and serving as a deformation starting point between the pair of front deformation guide portions in the width direction. Goods.

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