JP6117408B1 - Urine pad - Google Patents

Abstract

[PROBLEMS] To provide a urine absorption pad capable of absorbing urine up to a capacity close to the capacity allowed for the absorber while preventing the absorber from collapsing. A urine collecting pad includes a top sheet, a back sheet, and an absorber. The absorber 140 includes an upper layer absorber 140a positioned on the skin side and a lower layer absorber 140b positioned on the non-skin side. The upper layer absorber 140a has an upper layer groove portion 141a that extends in the longitudinal direction in the urination region and extends from the surface on the topsheet side to the inside of the upper layer absorber in the thickness direction. The lower layer absorbent body 140b includes an absorbent core 144 and a covering sheet 145 that wraps the absorbent core. The covering sheet covers the non-skin side surface of the absorbent core and both side surfaces in the width direction, and both end edges in the width direction of the covering sheet overlap each other on the skin side of the absorbent core. The absorbent core is wrapped so as to cover the surface. The skin side surface of the absorbent core is not bonded to the covering sheet. [Selection] Figure 2

Description

  The present invention relates to a urine collection pad.

  The urine absorbing pad is a urine absorbing pad that is used by being placed in a diaper, and is used, for example, by a bedridden person or a person with a physical disability. Therefore, since it is assumed that it will be worn for a certain long time, it is required to be able to absorb a large amount of urine commensurate with it. On the other hand, when a large amount of urine is absorbed, there is a possibility that the absorber will collapse, and a technique that can absorb a large amount of urine without causing a situation where the absorber collapses has been studied.

  As a technique for improving the absorption performance of the absorber, for example, a diaper used in Patent Document 1 is disclosed. In the disposable diaper of Patent Document 1, the hydrophilic sheet and the top sheet that wraps the absorbent body and / or the hydrophilic sheet and the absorbent body are bonded and fixed with an adhesive and extend in the longitudinal direction. The amount of adhesive in the longitudinal central zone located at the center in the width direction extends in the longitudinal direction and is less than the amount of adhesive in the longitudinal side edges located on both sides in the width direction. That is, by reducing the amount of adhesive applied in the central zone in the longitudinal direction and preventing it from being hindered by the adhesive when urine goes to the absorber, the adhesive can be used while maintaining the absorption performance. By applying, it tries to prevent the absorber from collapsing. Further, Patent Document 2 discloses a technique that allows the shape of a convex portion that is formed on a top sheet of an absorbent article and improves liquid permeability and touch to be maintained even in a wet state.

JP 2001-17470 A Japanese Patent No. 5683742

  In the disposable diaper of Patent Document 1, the joining at the peripheral portion of the top sheet and the back sheet and the joining of the back sheet and the hydrophilic sheet are not clearly shown in the specification and drawings, but considering technical common sense, Are also considered to be bonded and fixed together with an adhesive. In that case, both the skin-side portion and the non-skin-side portion of the hydrophilic sheet are fixed to other members with an adhesive, and increasing the volume of the region surrounded by the hydrophilic sheet Can not. Then, even if the absorber absorbs urine and tries to swell, the hydrophilic sheet is prevented from swelling and can only swell up to the volume of the area surrounded by the hydrophilic sheet, thus limiting the amount of urine absorbed by the absorber. Will receive. As a result, the absorber cannot be used up to its capacity limit, that is, the urine cannot be absorbed close to the capacity allowed by the absorber, and the absorption performance of the absorber may not be fully utilized. There is. As a result, the amount of urine that can be absorbed in one disposable diaper decreases, and for example, people who are bedridden or physically handicapped increase the number of disposable diapers exchanged at night. The burden on excretion increases for caregivers.

  An object of the present invention is to provide a urine absorbing pad that can absorb urine to a capacity close to that permitted by the absorber while preventing the absorber from collapsing.

  The urine absorbing pad of the present invention comprises (1) a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned between the top sheet and the back sheet, in the longitudinal direction, A urine absorbing pad having a width direction and a thickness direction, wherein the absorber comprises an upper layer absorber positioned on the skin side and a lower layer absorber positioned on the non-skin side, and the upper layer absorber is The urination region has an upper layer groove extending in the longitudinal direction and extending from the surface on the surface sheet side to the inside of the upper layer absorber in the thickness direction, and the lower layer absorber includes the absorbent core, A covering sheet that wraps the absorbent core, wherein the covering sheet covers the non-skin side surface of the absorbent core and both side surfaces in the width direction, and both end edges in the width direction of the covering sheet are The skin of the absorbent core in a state of being overlapped on the skin side of the absorbent core So as to cover the surface, which encloses the absorbent core, the skin-side surface of the absorbent core is the cover sheet and the non-bonding, the urine absorbing pad.

  In this urine absorption pad, the upper layer absorbent body is formed with an upper layer groove that is recessed from the surface on the surface sheet side toward the lower layer absorbent body, and the skin side surface of the absorbent core of the lower layer absorbent body is not bonded to the covering sheet. That is, according to the swelling of the absorbent core, both end edges in the width direction of the covering sheet move outward, so that the volume of the inner region of the covering sheet can be increased. As a result, most of the excreted urine can be moved and absorbed through the upper layer groove of the urination region to the inside of the lower layer absorber, and the amount of urine absorbed by the lower layer absorber increases, so that the lower layer absorber Even if this absorbent core swells, it can suppress that a covering sheet prevents swelling of an absorbent core. As a result, the lower layer absorber is not limited by the amount of urine absorbed, and the absorber can be used up to its capacity limit. At this time, the absorbent core of the lower layer absorbent swells, and a part of the skin-side surface of the absorbent core is not covered with the covering sheet, and the absorbent core may collapse. However, since the upper layer absorbent body is located on the skin side of the absorbent core, covering the skin side surface of the absorbent core that is no longer covered with the covering sheet with the upper layer absorbent body may cause the absorber to collapse. Can be prevented. In this way, the absorber can be used close to its capacity limit while preventing the absorber from collapsing. That is, the absorption performance can be fully utilized in the urine absorption pad, and the burden on the wearer and the caregiver who cares for the wearer can be reduced.

The urine absorption pad of the present invention is (2) the urine absorption pad according to (1) above, wherein the non-skin side surface of the upper layer absorbent body and the skin side surface of the covering sheet are non-bonded. There may be.
In this urine pick-up pad, since the upper layer absorbent body and the cover sheet of the lower layer absorbent body are not joined, the movement of the cover sheet by the upper layer absorbent body becomes more limited. Thereby, when the absorptive core of a lower layer absorber swells, the both end edges which the covering sheet overlapped can move to the outer side of the width direction more easily without being obstructed by the upper layer absorber. Thereby, it is possible to use the absorber close to its capacity limit while preventing the absorber from collapsing.

The urine absorbing pad of the present invention is (3) the upper layer absorber is wider in the width direction than the lower layer absorber, and a portion wider than the lower layer absorber is bonded to the back sheet (1) ) Or a urine absorption pad according to (2).
In this urine absorbing pad, the upper layer absorbent body is wider in the width direction than the lower layer absorbent body, and the wide portion is joined to the back sheet. In that case, in the width direction, the lower layer absorber absorbs urine and swells, and when both end edges reach the joint portion between the wide portion and the back sheet, the substantially central portion of the lower layer absorber is the side of the upper layer absorber. That is, it becomes a shape convex to the skin side, and the deformation in the width direction of the lower layer absorber is absorbed. By the deformation, the absorbent body comes closer to the wearer's urination region, and most of the excreted urine can be moved from the upper layer groove portion of the urination region to the inside of the lower layer absorber to be easily absorbed. Thereby, it is possible to use the absorber close to its capacity limit while preventing the absorber from collapsing.

In the urine absorption pad of the present invention, (4) in the longitudinal direction, the basis weight of the adhesive between the top sheet and the back sheet at both ends of the urine collection pad is the both ends of the urine collection pad. The urine absorption pad according to any one of (1) to (3) above, which is larger than a basis weight of the adhesive between the top sheet and the back sheet other than the portion.
When the absorbent core absorbs urine and the swelling progresses, the force with which the absorbent body swells becomes too strong, causing gaps at both ends in the longitudinal direction, and the absorbent core may collapse from both ends in the longitudinal direction. In this urine absorbing pad, since a large amount of adhesive is applied at both ends in the longitudinal direction of the urine removing pad, it is possible to prevent the absorber from collapsing from both ends in the longitudinal direction. Thereby, it is possible to use the absorber close to its capacity limit while preventing the absorber from collapsing.

In the urine absorption pad of the present invention, (5) the upper layer groove portion of the upper layer absorbent body penetrates in the thickness direction, and the absorbent core of the lower layer absorbent body extends to the urination region in the longitudinal direction. The above-mentioned (1) to (4), comprising a lower layer groove portion that is provided and recessed in the thickness direction, and the lower layer groove portion overlaps at least a part of the upper layer groove portion in the thickness direction. It may be the urine collection pad described.
In this urine absorption pad, since the lower layer groove is also formed in the lower layer absorber, urine can be drawn into the lower layer absorber on the non-skin side, and the absorber is used close to its capacity limit it can. In addition, urine can be prevented from spreading on the surface sheet and becoming damp, and even when the absorber is used up to its capacity limit, it can be prevented that the wearer's skin becomes damp, It can be kept dry.

In the urine absorbing pad of the present invention, (6) the lower layer groove portion of the absorbent core penetrates in the thickness direction, and the region surrounding the non-skin side edge of the lower layer groove portion in the absorbent core is: The urine absorption pad according to (5) above, which is bonded to the covering sheet.
In this urine pick-up pad, since the region surrounding the non-skin side edge of the lower layer groove in the absorbent core is joined to the covering sheet, the position of the non-skin side edge of the lower layer groove is fixed. Thereby, the shape of the lower layer groove can be maintained regardless of the movement of the wearer and the circulation of urine. Thereby, the performance of drawing urine into the lower layer absorber can be maintained, and the absorber can be used close to its capacity limit.

(7) One of the longitudinal directions is a ventral direction, the other is a dorsal direction, and the lower layer ventral end of the lower layer groove portion in the ventral direction and the urine collecting pad The distance between the lower end of the lower groove and the lower end of the lower groove is shorter than the distance between the lower end of the lower groove and the end of the urine absorption pad. The angle formed by the wall surface of the side end portion with respect to the bottom surface in the lower layer groove portion is more perpendicular to the angle formed by the wall surface of the lower layer back side end portion with respect to the bottom surface in the lower layer groove portion, (5) or The urine absorption pad according to (6) may be used.
The wall of the lower ventral end is closer to the end of the urine removal pad than the wall of the lower dorsal end, so urine leaking from the lower ventral end passes through the upper groove to the end of the urine removal pad. It is easy to arrive at the part relatively. In the present urine collecting pad, the wall surface of the lower layer abdominal side end portion is closer to the perpendicular to the bottom surface in the lower layer groove than the wall surface of the lower layer back side end portion, and is steeper. Therefore, it is possible to make it difficult to leak urine from the lower ventral end to the end of the urine collecting pad through the upper groove. Urine can be drawn into the lower layer absorber. Thereby, the absorber can be used closer to its capacity limit without leaking urine.

(8) The angle formed by the wall surface of the lower layer groove portion with respect to the bottom surface in the lower layer groove portion is perpendicular to the angle formed by the wall surface of the upper layer groove portion with respect to the bottom surface in the upper layer groove portion. The urine absorption pad according to any one of (5) to (7) above,
In this urine collecting pad, the wall surface of the lower layer groove portion is closer to the perpendicular to the bottom surface in the groove portion than the wall surface of the upper layer groove portion, and is steeper. Therefore, since the wall surface of the upper layer groove portion is gentle, urine can be more easily drawn into the lower layer groove portion through the upper layer groove portion, and since the wall surface of the lower layer groove portion is steep, it is possible to make it difficult to leak urine once drawn. Thereby, the absorber can be used closer to its capacity limit without leaking urine.

(9) One of the longitudinal directions is the ventral direction and the other is the dorsal direction, and the upper layer abdominal end of the upper layer groove and the urine absorption pad. The distance between the upper-layer groove portion and the upper-layer groove portion is shorter than the distance between the upper-layer dorsal end portion of the upper-layer groove and the dorsal-direction end portion of the urine collecting pad. The angle formed by the wall surface of the side end portion with respect to the bottom surface in the upper layer groove portion is closer to the vertical than the angle formed by the wall surface of the upper layer back side end portion with respect to the bottom surface in the upper layer groove portion. The urine absorbing pad according to any one of (8) may be used.
Since the wall surface of the upper ventral end is closer to the end of the urine collection pad than the wall of the upper dorsal end, urine leaking from the upper ventral end is relatively to the end of the urine absorption pad. Easy to arrive. In this urine picking pad, the wall surface of the upper layer ventral side end portion is closer to the vertical than the wall surface of the upper layer groove side portion and is steeper than the wall surface of the upper layer back side end portion. Therefore, it is possible to make it difficult for urine to leak from the upper layer ventral end to the end of the urine collecting pad, and to draw urine further into the lower layer absorber. As a result, the absorber can be used closer to its capacity limit without leaking urine.

(10) One of the longitudinal directions is a ventral direction, the other is a dorsal direction, the upper layer width direction end of the upper layer groove in the width direction, and the urine The distance between the widthwise one end of the pad and the distance between the widthwise other upper layer widthwise end of the upper layer groove and the widthwise other end of the urine collecting pad Is the distance between the upper layer ventral end of the ventral direction of the upper layer groove and the end of the ventral pad of the urine collecting pad, and the upper layer dorsal end of the upper layer groove in the dorsal direction. The angle formed by the wall surfaces of the one and the other upper layer width direction end portions with respect to the bottom surface in the upper layer groove is shorter than the distance from the back side end portion of the urine collecting pad. The angle formed by the wall surface of the upper portion with respect to the bottom surface in the upper layer groove portion, and the wall surface of the upper layer back side end portion is the upper layer. Close to perpendicular than the angle formed with respect to the bottom surface of the portion may be a urine absorbing pad, according to any one of the above (1) to (9).
Since the wall surface of the upper layer width direction end is closer to the end of the urine collection pad than the wall surface of the upper layer ventral side end and the wall surface of the upper layer back side end, urine leaking from the upper layer width direction end It is relatively easy to arrive at the end of the pad. In this urine collecting pad, the wall surface at the upper layer width direction end is closer to the vertical in the upper layer groove than the wall surface of the upper layer belly side end and the wall surface of the upper layer back side end, and is made steeper. . Therefore, urine can be made difficult to leak from the upper layer width direction end toward the end of the urine collecting pad, and urine can be drawn more into the lower layer absorber. Thereby, the absorber can be used closer to its capacity limit without leaking urine.

The urine absorbing pad of the present invention is (11) the upper layer absorber and the lower layer absorber include a polymer absorber and pulp fibers, and the basis weight of the polymer absorber and the pulp fibers combined. The urine absorption pad according to any one of (1) to (10), wherein the ratio of the basis weight of the polymer absorbent to the upper absorbent is greater than the lower absorbent. It may be.
In this urine picking pad, the lower layer absorbent has a higher pulp fiber ratio than the upper layer absorbent, so that urine can be drawn more into the lower layer absorbent. Thereby, the absorber can be used closer to its capacity.

The urine absorbing pad of the present invention is (12) the surface sheet is a nonwoven fabric having a convex portion formed on the skin side surface, and the content ratio of the thickness direction oriented fibers in the convex portion of the nonwoven fabric is The above (1) to (11), wherein the nonwoven fabric has a wet thickness greater than 85% of the dry thickness of the nonwoven fabric, which is greater than the content of the thickness-oriented fibers in the portions other than the convex portions of the nonwoven fabric. The urine absorption pad according to any one of the above.
In this urine picking pad, the topsheet has predetermined characteristics and is a non-woven fabric having a convex portion formed on the surface on the skin side, so the shape of the convex portion on the topsheet is maintained and the topsheet is clogged. Suppressed, the absorber can be used even closer to its capacity limit.

  According to the present invention, it is an object of the present invention to provide a urine absorption pad that can absorb urine up to a capacity close to the capacity allowed for the absorber while preventing the absorber from collapsing.

It is a top view of the urine absorption pad which concerns on embodiment. It is a disassembled perspective view of the principal part of the urine collection pad shown in FIG. It is III-III sectional drawing of FIG. It is IV-IV sectional drawing of FIG. It is a schematic diagram explaining the effect | action of the absorber of the urine absorption pad shown in FIG. It is a schematic diagram explaining the longitudinal direction shape of the groove part of the urine absorption pad shown in FIG. It is a schematic diagram explaining the width direction shape of the groove part of the urine collection pad shown in FIG. It is a fragmentary perspective view of the surface sheet of the urine collection pad shown in FIG. It is a schematic diagram explaining the manufacturing method of the surface sheet of FIG.

  Hereinafter, the urine absorption pad according to the embodiment will be described with reference to the drawings.

  1 to 4 show a configuration of the urine collecting pad 100 according to the present embodiment. However, FIG. 1 is a plan view of the urine collection pad 100, FIG. 2 is an exploded perspective view of the main part of the urine collection pad 100, FIG. 3 is a sectional view taken along line III-III in FIG. 1 is a sectional view taken along line IV-IV. The urine removing pad 100 has a longitudinal direction L, a width direction W, and a thickness direction T, and passes through the center of the width direction W and extends in the longitudinal direction L, and a crotch portion (described later) in the longitudinal direction L. It further has a central axis CW that passes through the center and extends in the width direction W. The directions toward and away from the central axis CL are the inside and outside directions of the width direction W, respectively, and the directions toward and away from the center axis CW are the inside and outside directions of the longitudinal direction L. In FIG. 1, the upper side is the front side or the abdomen side in the longitudinal direction L, and the lower side is the rear side or the back side in the longitudinal direction L. In this specification, viewing the urine absorbing pad 100 in the thickness direction from the upper surface side is simply referred to as “plan view”. “Skin side” and “non-skin side” refer to a side closer to and far from the skin surface of the wearer in the thickness direction T when the wearer of the urine removing pad 100 wears the urine removing pad 100. Each means.

  As shown in FIGS. 1 and 2, the urine collecting pad 100 has a ventral side portion 111, a crotch portion 112, and a dorsal side portion 113 that are arranged along the longitudinal direction. The substantially center of has a constricted bowl shape. When the urine absorbing pad 100 is worn, the abdomen 111 is applied to the wearer's abdomen, the crotch 112 is applied to the wearer's crotch, and the back 113 is the wearer's buttocks and / or back. To. The urine absorbing pad 100 has, for example, a dimension in the longitudinal direction L of 350 to 880 mm and a dimension in the width direction W of 160 to 460 mm.

  The urine absorbing pad 100 includes a top sheet 120, a back sheet 130, and an absorber 140. The longitudinal direction L, the width direction W and the thickness direction T, the skin side, and the non-skin side of the urine absorbing pad 100 coincide with the top sheet 120, the back sheet 130, and the absorber 140. Similarly to the urine absorbing pad 100, the longitudinal direction L, the width direction W, the thickness direction T, the skin side, and the non-skin side are also used in the 130 and the absorber 140.

  The top sheet 120 is a liquid permeable sheet located on the skin side in the thickness direction T. Examples of the surface sheet 120 include any liquid-permeable sheet such as a liquid-permeable nonwoven fabric or woven fabric, a synthetic resin film having liquid-permeable holes formed therein, or a composite sheet thereof. The back sheet 130 is a liquid-impermeable sheet located on the non-skin side in the thickness direction T. Examples of the back sheet 130 include liquid-impermeable sheets such as liquid-impermeable nonwoven fabrics and synthetic resin films, composite sheets of nonwoven fabrics and synthetic resin films, and SMS nonwoven fabrics. The absorber 140 is a member having liquid absorbability and liquid retainability that is located between the top sheet 120 and the back sheet 130. The absorbent body 140 includes an upper layer absorbent body 140 a located on the skin side, and a lower layer absorbent body 140 b located on the non-skin side and including an absorbent core 144 and a covering sheet 145 that wraps the absorbent core 144. Examples of the material of the upper layer absorbent body 140a and the absorbent core 144 include pulp fibers, synthetic fibers, and polymer absorbent bodies. Examples of the covering sheet 145 include a nonwoven fabric and a tissue. In addition, the number of the layers which the absorber 140 has is arbitrary, and in this Embodiment, the absorber 140 further contains the upper layer sheet | seat 140c located in the skin side rather than the upper layer absorber 140a. Examples of the upper layer sheet 140c include a nonwoven fabric and a tissue.

  In the present embodiment, urine collection pad 100 further includes a pair of leak-proof walls 160 and 160 and an exterior sheet 170. The pair of leak-proof walls 160 and 160 are liquid-impermeable sheets that are located on both sides in the width direction W of the top sheet 120 and extend in the longitudinal direction L (not shown in FIG. 2). The outer edge of the leak-proof wall 160 in the width direction W is a fixed end fixed to the top sheet 120, and the inner edge is a free end. An elastic member (not shown) extending in the longitudinal direction L is provided at the free end of the leak-proof wall 160, and the pair of leak-proof walls 160 and 160 rise to the skin side when worn. The exterior sheet 170 is a liquid-impermeable sheet located on the non-skin side of the back sheet 130 (not shown in FIGS. 1 and 2). There is no restriction | limiting in particular in the material of the leak-proof wall 160 or the exterior sheet | seat 170, For example, the material of the back surface sheet 130 is mentioned.

The skin-side surface of the absorber 140, that is, the skin-side surface of the upper layer sheet 140c and the surface sheet 120 are bonded to each other by a predetermined pattern adhesive (not shown), and the non-skin-side surface of the absorber 140, The non-skin side surface of the lower layer absorbent body 140b and the back sheet 130 are joined to each other by a predetermined pattern of adhesive (not shown). Further, the top sheet 120 and the back sheet 130 are joined to each other at their peripheral portions by a predetermined pattern of adhesive (not shown). The pair of leak-proof walls 160 and 160 and the top sheet 120 are bonded to each other by a predetermined pattern adhesive (not shown), and the exterior sheet 170 and the back sheet 130 are mutually connected to the predetermined pattern adhesive (not shown). )). The exterior sheet 170 and the pair of leak-proof walls 160 and 160 are joined to each other by a predetermined pattern of adhesive (not shown) at their peripheral portions. The basis weight (g / m ² ) of the adhesive is appropriately adjusted in consideration of materials and performance. The basis weight is, for example, 0.5 to 50 g / m ² , preferably 1 to 20 g / m ² . The basis weight of the adhesive is obtained by dividing the application amount (mass) of the adhesive applied to a material (surface sheet 120, back sheet 130, absorber 140, etc.) having a predetermined area in the urine absorption pad 100 by the predetermined area. To calculate.

The thickness, basis weight, and the like of the upper layer absorber 140a and the lower layer absorber 140b are appropriately adjusted in consideration of the liquid absorption property of the absorber 140 and the like. The thickness of the upper absorbent body 140a is usually 1.5 to 5.0 mm, preferably 2.5 to 3.5 mm, and the basis weight is usually 150 to 400 g / m ² , preferably 200 to 300 g / m ² . . The thickness of the lower layer absorber 140b is usually 1.5 to 5.0 mm, preferably 2.5 to 3.5 mm, and the basis weight is usually 150 to 400 g / m ² , preferably 200 to 300 g / m ² . . The thickness of the absorber is measured by measuring a 100 mm × 100 mm absorber sample cut out from a urine absorption pad and a commercially available thickness measuring instrument (eg, PE257 manufactured by PEACOCK, measuring surface 50 mm (diameter), measuring pressure 3 g / cm. ² ) and is carried out as follows. Using a thickness meter, pressurize five different parts of the absorber sample at a constant pressure of 3 g / cm ² , measure the thickness after 10 seconds of pressurization at each part, and calculate the average of the five measured values as thickness (mm) And The measurement of the basic weight of an absorber is as follows, for example. The mass of three test pieces (10 mm × 10 mm) cut out from the absorber was measured with a direct balance (for example, electronic balance HF-300 manufactured by Kensei Kogyo Co., Ltd.), and the average of the masses of the three test pieces was measured. The mass (g / m ² ) per unit area of the absorber calculated from the value is defined as the basis weight of the absorber.

  The upper layer absorber 140a and the lower layer absorber 140b preferably contain a polymer absorber and pulp fibers from the viewpoint of absorption performance. In that case, the ratio of the basis weight of the polymer absorbent to the basis weight (the basis weight of the absorbent in this embodiment) of the polymer absorbent and the pulp fiber, that is, the content of the polymer absorbent is the upper layer. The absorber 140a is preferably larger than the lower layer absorber 140b. In other words, the ratio of the basis weight of the pulp fiber to the basis weight of the polymer absorber and the pulp fiber, that is, the content of the pulp fiber, is that the lower layer absorber 140b is larger than the upper layer absorber 140a. Is preferred. In the urine picking pad 100, the lower layer absorbent body 140b has a higher pulp fiber ratio than the upper layer absorbent body 140a, so that urine can be drawn into the lower layer absorbent body 140b. Thereby, the absorber 140 can be used to the limit of its capacity. The basis weight of the polymer absorber is calculated by dividing the blending amount (mass) of the polymer absorber blended into the absorber having a predetermined area by the predetermined area. The basis weight of the pulp fiber is calculated by subtracting the basis weight of the polymer absorbent from the basis weight of the absorbent.

  The upper layer absorbent body 140a has a substantially bowl-like shape that is long in the longitudinal direction L and narrowed at the approximate center of the crotch portion 112 in the longitudinal direction L in plan view. The lower layer absorber 140b has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W in plan view. However, in the lower layer absorber 140b, the dimension in the longitudinal direction L is shorter than the dimension in the longitudinal direction L of the upper layer absorber 140a, and the dimension in the width direction W is shorter than the dimension in the width direction W of the upper layer absorber 140a. Therefore, both end edges in the longitudinal direction L of the upper layer absorbent body 140a are located outside the both end edges in the longitudinal direction L of the lower layer absorbent body 140b in the longitudinal direction L. Therefore, the upper layer absorbent body 140a is more than the lower layer absorbent body 140b. Widely formed on both sides in the longitudinal direction L. Further, both end edges in the width direction W of the upper layer absorbent body 140a are located outside the both end edges in the width direction W of the lower layer absorbent body 140b in the longitudinal direction L. Therefore, the upper layer absorbent body 140a is more than the lower layer absorbent body 140b. Is also widely formed on both sides in the width direction W. Further, the upper layer sheet 140c has a substantially rectangular shape in which the longitudinal direction L is long and the dimension in the width direction W is short in plan view. However, the dimension in the longitudinal direction L of the upper layer sheet 140c is the same as the dimension in the longitudinal direction L of the upper layer absorbent body 140a, and the dimension in the width direction W is longer than the dimension of the crotch portion 112 in the width direction W of the upper layer absorbent body 140a. It is a substantially rectangular shape that is shorter than the dimensions of the ventral side portion 111 and the back side portion 113. Note that the shape of each component of the absorber 140 in plan view is arbitrary.

  As shown in FIGS. 3 and 4, in the lower layer absorbent body 140b, the absorbent core 144 includes the non-skin side surface 144sc, the skin side surface 144sa, and both sides in the width direction W between the non-skin side surface 144sc and the skin side surface 144sa. Surfaces 144sb and 144sb are provided. The covering sheet 145 (core wrap) includes a non-skin side portion 145sc that faces the non-skin side surface 144sc when the absorbent core 144 is wrapped, both side portions 145sb and 145sb that face the side surfaces 144sb and 144sb, and the skin side surface 144sa. Two skin side portions 145sa1 and 145sa2 including both end portions 145e1 and 145e2 in the width direction W. The covering sheet 145 covers the non-skin side surface 144sc of the absorbent core 144 with the non-skin side portion 145sc, covers both side surfaces 144sb and 144sb of the absorbent core 144 in the width direction W with both side portions 145sb and 145sb, and The absorbent core 144 is wrapped by covering the skin side surface 144sa of the absorbent core 144 with the two skin side portions 145sa1 and 145sa2 being overlapped.

In the absorber 140, the non-skin side surface of the upper layer sheet 140c and the skin side surface of the upper layer absorber 140a are joined to each other by an adhesive (not shown) in a predetermined pattern. Further, the non-skin side portion 145sc of the covering sheet 145 and the non-skin side surface 144sc of the absorbent core 144 are joined to each other by a predetermined pattern adhesive (not shown). The basis weight (g / m ² ) of the adhesive is appropriately adjusted in consideration of the material and performance of the urine removing pad 100. The basis weight is usually 0.5 to 50 g / m ² , preferably 1 to 20 g / m ² .

  On the other hand, the skin side surface 144sa of the absorbent core 144 is not joined to the covering sheet 145. That is, the skin side surfaces 144sa (preferably both side surfaces 144sb and 144sb) of the absorbent core 144 and the skin side portions 145sa1 and 145sa2 (preferably both side portions 145sb and 145sb) of the covering sheet 145 are not joined, and thus, adhesives, etc. Further, both end portions 145e1 and 145e2 of the skin side portions 145sa1 and 145sa2 of the covering sheet 145 are not joined to each other, and thus are not joined by an adhesive or the like.

  The operation when the skin side surface 144sa of the absorbent core 144 is not joined to the covering sheet 145 will be described. FIG. 5 is a diagram schematically illustrating the operation of the absorber 140. As shown in FIG. 5A, before using the urine absorbing pad 100, the absorbent core 144 has, for example, a dimension W1 in the width direction W and a dimension T1 in the thickness direction T. Thereafter, when the urine absorbing pad 100 is used and the amount of urine absorbed by the absorbent core 144 increases, the absorbent core 144 swells and the dimensions increase in the width direction W and the thickness direction T. If the skin side portions 145sa1 and 145sa2 of the covering sheet 145 located on the skin side surface 144sa of the absorbent core 144 are constrained to the absorbent core 144 by an adhesive or the like, the volume of the inner region of the covering sheet 145 is increased. There is an upper limit. In that case, the absorbent core 144 cannot increase beyond its volume, limiting urine absorption.

  However, in the present embodiment, the skin side portions 145sa1, 145sa2 and the both side portions 145sb, 145sb of the covering sheet 145 located on the skin side surface 144sa of the absorbent core 144 are not constrained to the absorbent core 144 by an adhesive or the like. . Therefore, the skin side portions 145sa1 and 145sa2 and the both side portions 145sb and 145sb of the covering sheet 145 can be easily moved and deformed in the width direction W and the thickness direction T, and the volume of the inner region of the covering sheet 145 can be increased. . Accordingly, the amount of urine absorbed by the lower layer absorbent body 140b increases, and even if the absorbent core 144 of the lower layer absorbent body 140b swells and expands in the width direction W or the thickness direction T, the covering sheet 145 responds and follows. The skin side portions 145sa1 and 145sa2 and the side portions 145sb and 145sb can also be moved and deformed in the width direction W and the thickness direction T. That is, it can suppress that the coating sheet 145 prevents swelling of the absorptive core 144. As a result, the lower layer absorber 140b can be used up to its capacity limit without being limited by the amount of urine absorbed. For example, as shown in FIG. 5B, the absorbent core 144 can have a dimension W2 that is sufficiently larger than W1 in the width direction W and T2 that is sufficiently larger than T1 in the thickness direction T. .

  However, at this time, as the amount of urine absorbed increases, the absorbent core 144 of the lower layer absorbent body 140b swells, and eventually the skin side surface 144sa of the absorbent core 144 as shown in FIG. There is a case where a part of the sheet is not covered with the covering sheet 145. Then, at first glance, it can be considered that the absorbent core 144 that is no longer covered with the covering sheet 145 collapses. However, in the present embodiment, since the upper layer absorbent body 140a is positioned on the skin side of the absorbent core 144, the skin side surface 144sa of the absorbent core 144 that is no longer covered with the covering sheet 145 is covered with the upper layer absorbent body 140a. By covering, it is possible to prevent the absorber 140 from collapsing. In this case, the covering sheet 145 and the upper layer absorbent body 140a may be joined to such an extent that the movement of the covering sheet 145 is not hindered so much.

  In the present embodiment, the covering sheet 145 and the upper absorbent body 140a are not joined. That is, the skin side portions 145sa and 145sa of the covering sheet 145 and the non-skin side surface of the upper absorbent body 140a are not joined, and thus are not joined by an adhesive or the like. Therefore, the movement / deformation of the covering sheet 145 is hardly restricted by the upper-layer absorber 140a. Thereby, even if the absorbent core 144 of the lower layer absorbent body 140b swells and spreads outside in the width direction W, the skin side portions 145sa and 145sa of the covering sheet 145 are more easily widened without being obstructed by the upper layer absorbent body 140a. It can move to the outside of the direction W, so that the volume of the area inside the covering sheet 145 can be increased. That is, it can suppress more exactly that the covering sheet 145 prevents the absorbent core 144 from swelling.

  In the present embodiment, as described above, the upper layer absorber 140a is formed wider on both sides in the width direction W than the lower layer absorber 140b. At this time, a portion wider in the width direction W than the lower layer absorber 140b in the upper layer absorber 140a is joined to the back sheet 130 with an adhesive on the non-skin side. In this case, the lower layer absorbent body 140b swells by absorbing urine in the width direction W, and when the both end edges reach the joint portion between the wide portion and the back sheet 130, it cannot swell any more in the width direction W. Therefore, the deformation of the lower layer absorbent body 140b in the width direction W is absorbed by the substantially central portion of the lower layer absorbent body 140b rising to the upper layer absorbent body 140a side, that is, the skin side. Due to the deformation in which the lower layer absorbent body 140b is convex on the skin side, the absorber 140 comes closer to the region where the wearer's excretory opening abuts, that is, the urination region, and most of the excreted urine is at least the upper layer of the urine region. It can be easily moved and absorbed from the groove 141a (described later) to the inside of the lower layer absorber 140b. In particular, in this embodiment, the amount of urine absorbed by the absorber 140 increases (the swelling of the lower layer absorber 140b advances), and the urination area approaches the absorber 140 when the absorption rate decreases. It is preferable because it can promote absorption of urine. Thus, it is possible to use the absorber 140 close to its capacity limit while preventing the absorber 140 from collapsing.

  In the present embodiment, as described above, upper layer absorber 140a is formed wider on both sides in longitudinal direction L than lower layer absorber 140b. At this time, the part wider in the longitudinal direction L than the lower layer absorbent body 140b in the upper layer absorbent body 140a is joined to the back sheet with an adhesive on the non-skin side. In this case as well, the lower layer absorber 140b was excreted while assisting the deformation that protrudes toward the skin, as in the case where the upper layer absorber 140a is formed wider on both sides in the width direction W than the lower layer absorber 140b. Most of the urine can be moved from the upper layer groove 141a (described later) to the inside of the lower layer absorber 140b to be easily absorbed.

  In the present embodiment, in the longitudinal direction L, the basis weight of the adhesive between the top sheet 120 and the back sheet 130 at both ends E1 and E2 of the urine removing pad 100 shown in FIG. The basis weight of the adhesive between the top sheet 120 and the back sheet 130 at both ends E1, E2 is set larger. Here, both end portions E1 and E2 are regions of a predetermined length inward in the longitudinal direction L from both end edges of the urine collecting pad 100, and regions including a part of both ends of the absorber 140 inside the region. It is. For example, it is in the range of about 20% of the length of the urine collecting pad 100 from both end edges of the urine collecting pad 100. When the absorbent core 144 absorbs urine and swells, the swelling force of the absorbent body 140 becomes too strong, and gaps are generated in the thickness direction T at both ends E1 and E2 in the longitudinal direction L. It can be considered that the absorbent core 144 collapses from the vicinity of the portions E1 and E2. However, in the urine removing pad 100, since a large amount of adhesive is applied at both ends E1 and E2 of the urine removing pad 100, a gap is generated at both ends E1 and E2, and the absorber is absorbed from both ends E1 and E2. The situation where 140 collapses can be prevented. Thereby, the absorber 140 can be used to the limit of the capacity | capacitance, preventing that the absorber 140 collapse | crumbles.

  In the present embodiment, in the width direction W, the basis weight of the adhesive between the top sheet 120 and the back sheet 130 in the absorber non-existing region where the absorber 140 is not present in plan view in the urine absorbing pad 100 is It may be larger than the basis weight of the adhesive between the top sheet 120 and the back sheet 130 in the absorbent body existence region where the absorbent body 140 is present in a plan view of the urine collecting pad 100. When the absorbent core absorbs urine and swells, the force with which the absorbent body swells becomes too strong, causing gaps at both ends in the width direction W, and the absorbent core 144 collapses from both ends in the width direction W. Can be considered. However, in the urine collection pad 100, when a large amount of adhesive is applied at both ends in the width direction W of the urine collection pad, it is possible to prevent the absorber from collapsing from both ends in the width direction W. Thereby, the absorber 140 can be used to the limit of the capacity | capacitance, preventing that the absorber 140 collapse | crumbles.

  In the absorber 140, as shown in FIG.2 and FIG.3, the upper layer absorber 140a has the upper layer groove part 141a recessed in the thickness direction T toward the non-skin side from the skin side. The upper layer groove 141a is a through hole that penetrates the upper layer absorber 140a in the thickness direction T in the present embodiment. The upper layer groove portion 141 a is located in the crotch portion 112 of the urine absorbing pad 100 and extends in the longitudinal direction L through the center in the width direction W of the absorbent body 140. That is, the upper layer groove 141a is formed in the urination region. As a result, before the excreted urine diffuses on the top sheet 120, that is, without contaminating the skin-side surface of the urine collecting pad 100, the urine is transferred to the inside of the lower layer absorber 140b through the upper layer groove 141a. It can be retracted and the absorber 140 can be used to near its capacity limit. In particular, in the present embodiment, since the upper layer groove 141a is a through hole, urine can be drawn into the lower layer absorber 140b more quickly.

  In the present embodiment, the upper layer groove 141a is a through hole, and the lower layer absorber 140b has a lower layer groove 141b that is recessed in the thickness direction T from the skin side toward the non-skin side. In this embodiment, lower layer groove 141b is a through hole that penetrates lower layer absorber 140b in thickness direction T. The lower layer groove portion 141b is located in the crotch portion 112 of the urine collecting pad 100 and extends in the longitudinal direction L through the center of the absorbent body 140 in the width direction W. That is, the lower layer groove 141b is formed in the urination region. Further, the upper layer groove 141a and the lower layer groove 141b are formed so as to overlap at least partially in plan view. Thereby, when the excreted urine reaches the lower layer absorber 140b through the upper layer groove portion 141a of the upper layer absorber 140a, the urine can be drawn further into the lower layer absorber 140b through the lower layer groove portion 141b. The absorber 140 can be used to near its capacity limit. In particular, in the present embodiment, since the lower layer groove 141b is a through-hole, urine can be drawn more quickly into the lower layer absorber 140b.

  In the present embodiment, the positions of both through holes as the upper layer groove 141a and the lower layer groove 141b are formed so as to coincide with each other in plan view (that is, both through holes communicate with each other). As a result, the absorber 140 is formed with a groove 141 in which the upper layer groove 141a and the lower layer groove 141b overlap in the thickness direction T. Thereby, when the excreted urine reaches the lower layer absorber 140b via the upper layer groove portion 141a of the upper layer absorber 140a, the urine can be more reliably introduced into the lower layer groove portion 141b and further drawn into the lower layer absorber 140b. be able to. By drawing urine into the lower layer and sucking urine with the lower layer absorber 140b, liquid return to the upper layer absorber 140a can be prevented, and a crisp feeling can be maintained, that is, rewet back can be reduced.

  The dimension (length) in the longitudinal direction L and the dimension (width) in the width direction W in plan view of the upper layer groove portion 141a and the lower layer groove portion 141b are appropriately determined in consideration of the sizes of the upper layer absorber 140a and the lower layer absorber 140b. Adjusted. The width | variety of the upper-layer groove part 141a is 5.0-50 mm normally, Preferably it is 10-20 mm. The width of the lower layer groove 141b is equal to or narrower than the width of the upper layer groove 141a, and is usually 5.0 to 40 mm, preferably 10 to 15 mm. The length of the upper layer groove 141a is usually 50 to 300 mm, preferably 50 to 200 mm, and more preferably 50 to 150 mm. The length of the lower layer groove 141b is equal to or shorter than the length of the upper layer groove 141a, and is usually 30 to 250 mm, preferably 30 to 150 mm. Even if the width and length of the upper layer groove portion 141a are equal to or greater than the width and length of the lower layer groove portion 141b, a slight deviation may occur in the step of laminating the upper layer absorber 140a and the lower layer absorber 140b. The size of the groove 141 viewed from the surface of the absorber 140 on the surface sheet 120 side is kept substantially constant. Further, a step is generated on the inner wall surface of the groove portion 141 and the inner surface area of the groove portion 141 is increased, so that the urine absorption capacity of the absorbent body 140 in the portion where the groove portion 141 is formed is improved.

  In general, in order to prevent the absorbent body from being twisted, after the absorbent body is coated with a covering sheet, means for heat-sealing or pressing may be taken. However, if they are performed, the volume of the absorber may decrease, or unintended deformation may occur when the absorber swells by absorbing urine, and urine may leak. . Therefore, in the present embodiment, it is preferable that these means are not substantially applied in order to prevent such a situation.

  6 and 7 schematically show a cross-sectional view perpendicular to the width direction W along the longitudinal direction L and a cross-sectional view perpendicular to the longitudinal direction L along the width direction W of the groove portion 141 and its peripheral portion of the absorber 140, respectively. It shows. In these drawings, the description of the upper layer sheet 140c is omitted, and the absorbent core 144 and the covering sheet 145 are integrally described as the lower layer absorber 140b. Here, the upper layer groove portion 141a includes the wall surfaces SWU1 and SWU2 arranged in the width direction W along the longitudinal direction L, and the front (abdominal side) wall surface FWU and the rear surface arranged in the longitudinal direction L along the width direction W. Side (back side) wall surface BWU. Further, the lower layer groove portion 141b includes the wall surfaces SWL1 and SWL2 that are disposed facing each other in the width direction W along the longitudinal direction L, and the front side (ventral side) wall surface FWL and the rear side that are disposed facing each other in the longitudinal direction L along the width direction W. (Back side) wall surface BWU. However, in FIG. 6, the left side in the longitudinal direction L is the front side (abdominal side), and the right side is the rear side (back side). Moreover, when the upper layer groove part 141a is a through-hole, the bottom face BU of the upper layer groove part 141a is a plane in which the non-skin side surface of the upper layer absorbent body 140a is virtually extended to the through hole. Similarly, the bottom surface BL of the lower layer groove 141b is a plane obtained by virtually extending the non-skin side surface of the lower layer absorber 140b to the through hole when the lower layer groove 141b is a through hole. Therefore, the bottom surfaces BU and BL are parallel to each other.

  As can be seen from FIGS. 1 and 6, the distance between the lower ventral end LL1, which is the ventral end of the lower slot 141b, and the ventral end of the urine collecting pad 100 is the distance between the lower slot 141b. It is shorter than the distance between the lower layer dorsal end LL2 which is the end in the dorsal direction and the dorsal direction end of the urine collecting pad 100. Therefore, in the present embodiment, as shown in FIG. 6, the angle β1 formed by the wall surface FWL of the lower layer ventral side end portion LL1 with respect to the bottom surface BL in the lower layer groove portion 141b and the wall surface BWL of the lower layer back side end portion LL2 are the lower layer. The angle β2 formed with respect to the bottom surface BL in the groove portion 141b is closer to the perpendicular to the bottom surface BL, that is, more steep. Here, the urine leaking from the lower layer ventral end LL1 is relatively likely to reach the ventral end of the urine collecting pad 100 via the upper layer groove 141a. However, by having the above-described configuration, it is possible to make it difficult for urine to leak from the lower layer ventral end portion LL1 to the end portion of the urine collecting pad 100 in the ventral direction through the upper layer groove portion 141a. Thereby, urine can be drawn into the lower layer absorber 140b. As a result, the absorber 140 can be used closer to its capacity limit without leaking urine.

  As can be seen from FIGS. 1 and 6, the distance between the upper layer abdomen end LU1 which is the end of the upper layer groove 141a in the abdomen direction and the end of the urine collection pad 100 in the abdomen direction is the distance between the upper layer groove 141a. It is shorter than the distance between the upper layer dorsal end portion LU2 which is the end portion in the dorsal direction and the dorsal direction end portion of the urine collecting pad 100. Therefore, in the present embodiment, as shown in FIG. 6, the angle α1 formed by the wall surface FWU of the upper layer ventral end portion LU1 with respect to the bottom surface BL in the upper layer groove portion 141a is the wall surface BWU of the upper layer backside end portion LU2 is the upper layer groove portion. The angle α2 formed with respect to the bottom surface BL in 141a is closer to the vertical with respect to the bottom surface BU and is steeper. Here, the urine leaking from the upper layer ventral end portion LU1 is relatively easy to arrive at the ventral end of the urine collecting pad 100 in the ventral direction. However, by having the above configuration, it is possible to make it difficult for urine to leak from the upper layer abdomen end LU1 toward the abdomen end of the urine collection pad 100. Thereby, urine can be drawn into the lower layer absorber 140b. As a result, the absorber 140 can be used closer to its capacity limit without leaking urine.

  In the present embodiment, as shown in FIGS. 6 and 7, the angles β1, β2, β3, β4 formed by the wall surfaces FWL, BWL, SL1, SL2 of the lower layer groove 141b with respect to the bottom surface BL in the lower layer 141b are as follows: The wall surfaces FWU, BWU, SU1, and SU2 of the upper layer groove 141a are closer to and perpendicular to the bottom surfaces BU and BL than the angles α1, α2, α3, and α4 formed with respect to the bottom surface BU in the upper layer groove 141a. . In other words, the wall surfaces FWU, BWU, SU1, and SU2 of the upper layer groove portion 141a are made more gentle with respect to the bottom surfaces BL and BU in the groove portion 141 than the wall surfaces FWL, BWL, SL1, and SL2 of the lower layer groove portion 141b. Therefore, with the above configuration, since the wall surface FWU, BWU, SU1, SU2 of the upper layer groove portion 141a is gentle, it becomes easier to draw urine into the lower layer groove portion 141b via the upper layer groove portion 141a, and the wall surface FWL of the lower layer groove portion 141b, Since BWL, SL1, and SL2 are steep, urine once drawn can be made difficult to leak outside. As a result, urine is drawn into the lower layer, and the lower layer absorber 140b sucks urine to prevent the liquid from returning to the upper layer absorber 140a, maintaining a light feeling (reducing rewet back), and Without leaking, the absorber 140 can be used closer to its capacity limit.

  As can be seen from FIGS. 1, 6 and 7, the distance between one upper layer width direction end WU1 in the width direction W of the upper layer groove 141a and one end in the width direction W of the urine collecting pad 100, and The distance between the other upper layer width direction end portion WU2 in the width direction W of the upper layer groove portion 141a and the other end portion in the width direction W of the urine removing pad 100 is the upper layer belly side end portion LU1 in the ventral direction of the upper layer groove portion 141a. Shorter than the distance between the urine collecting pad 100 and the ventral end of the urine collecting pad 100 and the distance between the upper layer dorsal end LU2 of the upper layer groove 141a and the end of the urine collecting pad 100 in the dorsal direction. . In the present embodiment, as shown in FIGS. 6 and 7, the angles α3 and α4 formed by the wall surfaces SU1 and SU2 of one and the other upper layer width direction end portions WU1 and WU2 with respect to the bottom surface BU in the upper layer groove 141a are The angle α1 formed by the wall surface FWU of the upper layer ventral end portion LU1 with respect to the bottom surface BU in the upper layer groove portion 141a, and the angle α2 formed by the wall surface BWU of the upper layer back side end portion LU2 with respect to the bottom surface BU within the upper layer groove portion 141a. It is nearer to the bottom surface BU than the bottom BU, and is steep. With the above configuration, it is possible to make it difficult for urine to leak from the upper layer width direction end portions WU1, WU2 toward the end portion of the urine collecting pad. Thereby, urine can be drawn into the lower layer absorber 140b. As a result, the absorbent 140 can be used closer to its capacity limit without reducing rewet back and leaking urine.

  However, the measurement methods for the angles α1 to α4 and β1 to β4 are performed as follows. An X-ray fluoroscope FLEX-M863 manufactured by Beamsense Co., Ltd. was used. The sample is cut to 20 × 40 mm with the groove portion as the center, and the section sample is rotated by 0.2 degrees to scan 360 degrees. Thereafter, the captured 1800 images are connected to create a 3D image. Then, a cross-sectional view in the longitudinal direction L and a cross-sectional view in the width direction W were extracted from the 3D image, and the angles α1 to α4 and β1 to β4 were measured from the drawing. However, when the upper layer groove portion 141a is a through hole, the bottom surface BU is a plane obtained by virtually extending the non-skin side surface of the upper layer absorbent body 140a to the through hole, and the bottom surface BL has a lower layer groove portion 141b having a through hole. In this case, the non-skin side surface of the lower layer absorbent body 140b is a plane that is virtually extended to the through hole. Therefore, the bottom surfaces BU and BL are parallel to each other.

  In the present embodiment, the lower layer groove 141b of the absorbent core 144 penetrates in the thickness direction T. In this case, the region surrounding the non-skin side edge of the lower layer groove 141b in the absorbent core 144 (the annular region surrounding the through hole of the lower layer groove 141b, at least the range of the upper layer groove 141a in plan view) is the same as the covering sheet 145 Join. With such a configuration, the region on the non-skin side surface 144sc surrounding the non-skin side edge of the lower layer groove 141b in the absorbent core 144 is joined to the non-skin side portion 145sc of the covering sheet 145 with an adhesive. Therefore, the position of the non-skin side edge of the lower layer groove 141b is fixed on the covering sheet 145. Thereby, the shape of the lower layer groove 141b can be maintained irrespective of the movement of the wearer and the circulation of urine. Thereby, the performance of drawing urine into the lower layer absorber can be maintained, and the absorber 140 can be used closer to its capacity limit.

  In this Embodiment, the surface sheet 120 is formed with the nonwoven fabric by which the convex part was formed in the surface of the skin side. FIG. 8 is a partial perspective view of the top sheet 120 (nonwoven fabric). As for the surface sheet 120, the collar part 122 (an example of a convex part) is formed in the skin side surface 121. FIG. The flanges 122 extend in the longitudinal direction L and are arranged at a predetermined interval in the width direction W, and one groove 123 is formed between two adjacent flanges 122. Such a surface sheet 120 allows the excreted urine to easily spread in the longitudinal direction L along the buttocks 122 and the grooves 123, and spread of the urine in the width direction W and the urine from the urine removing pad 100 resulting therefrom. Leakage can be prevented, which is preferable. In FIG. 1, one brim 122 is shown as a region between two adjacent lines, and one groove 123 is shown by one line. For simplification of the drawing, in FIG. 1, a part of the groove structure 124 formed on the skin side surface 121 is omitted, and the groove structure 124 is omitted in FIGS. 2 to 4.

  Moreover, the content rate of the orientation fiber of the thickness direction T in the collar part 122 (convex part) among the surface sheets 120 is more than the content rate of the orientation fiber of the thickness direction T in parts other than a convex part among the surface sheets 120. It is large and it is preferable that the wet thickness of the top sheet 120 is 85% or more of the dry thickness of the top sheet 120. The top sheet 120 has a first fiber layer having a skin-side surface 121 and a second fiber layer located closer to the absorber than the first fiber layer, and the first fiber layer has durable hydrophilicity. More preferably, the second fiber layer is composed of a fiber having durable hydrophilicity and a fiber layer having non-durable hydrophilicity.

  The thickness t1 of the flange 122 is, for example, 0.3 to 1.5 mm, and the width w1 is, for example, 2.0 to 5.0 mm. On the other hand, the thickness t2 of the groove 123 is, for example, 0.1 to 0.5 mm, and the width w2 is, for example, 1.0 to 3.0 mm. The thickness of the buttocks was measured using a laser displacement meter (for example, Keyence Corporation, high-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030)), and 100 mm × cut out from the urine collection pad A surface sheet sample of 100 mm is placed on a horizontal measurement table, and the displacement from the measurement table is measured with a laser displacement meter for five different collars, and the average value of the five measurements is the thickness of the collar (mm). And Similarly, about five different groove parts, the displacement from a measurement stand is measured with a laser displacement meter, and let the average value of five measured values be the thickness (mm) of a groove part. The measurement of the width of the buttock is measured as a distance between the boundary lines of the buttock and the two groove portions located on both sides thereof based on a planar photograph or a plane image of the surface sheet sample in a non-pressurized state. The width of the groove is the same.

  Since the top sheet 120 has the predetermined characteristics as described above and has the ridge 122 (convex portion) on the skin side surface 121, even if the urine collecting pad 100 absorbs a large amount of urine, the top sheet The shape of the convex portion at 120 is maintained, the clogging of the topsheet 120 due to the solid component of urine is suppressed, and the absorber 140 can be used even closer to its capacity limit.

  As a method for producing such a nonwoven fabric, for example, the method described in Japanese Patent No. 5683742 can be used. According to this method, in the manufacturing apparatus schematically shown in FIG. 9, the web W is placed on the air-permeable support member 310 (example: net-like support member), and the air-permeable support member 310 is moved in a predetermined direction. The gas G is continuously injected onto the upper surface of the web W from a plurality of injection ports 332 formed at predetermined intervals in the injection unit 330. The gas G that has passed through the air-permeable support member 310 is sucked by the air intake unit disposed below the injection unit 330. A groove portion 123 extending in the moving direction of the air-permeable support member 310 is formed in a region of the upper surface of the web W where the gas G is injected, and a flange portion 122 is formed between two adjacent groove portions 123. It is formed. Thereby, the groove structure 124 can be formed in the web W.

  However, the oriented fiber in the thickness direction T is a fiber oriented in the angle range of +45 degrees to -45 degrees with respect to the thickness direction T. The measuring method of the content rate of the thickness direction orientation fiber in the predetermined part of the nonwoven fabric for surface sheets is as follows. (1) Cut the nonwoven fabric to produce a nonwoven fabric sample. (2) A magnified image is taken from a direction perpendicular to the cut surface of the nonwoven fabric sample using a digital microscope VHX-100 manufactured by Keyence Corporation. The enlarged image is an image that has been enlarged to a magnification that enables measurement of 50 or more fibers, and the magnification is, for example, 20 to 50 times. When taking an enlarged image, focus on the fiber nearest to the cut surface of the non-woven fabric sample (excluding fibers that have irregularly jumped forward), and set the shooting depth (depth). The enlarged image is created on the PC screen as a 3D image. (3) A 3D image is converted into a 2D image, and a plurality of lines extending parallel to the thickness direction of the nonwoven fabric sample are drawn on the 2D image, and +45 degrees to -45 degrees with respect to the thickness direction of the nonwoven fabric sample. The number of fibers oriented at an angle of is counted. (4) The ratio of the number of counted fibers to the number of all fibers in the measurement range is calculated. (5) Repeat (1) to (4) several times (for example, 3 to 5 times), and set the average value as the content of the thickness direction oriented fiber.

For the measurement of the dry thickness and the wet thickness, a non-woven fabric for the topsheet that has been conditioned in advance is used. Conditioning of the nonwoven fabric is carried out by storing the nonwoven fabric in a dry state in a standard state (temperature 23 ± 2 ° C., relative humidity 50 ± 5%) for 24 hours or more. The nonwoven fabric in a dry state is a nonwoven fabric having a moisture content of usually 12% or less, preferably 10% or less. The dry thickness is measured as follows. Using thickness gauge (example: FS-60DS manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd., measuring element area 15 cm ² ), when using three different parts of the nonwoven fabric after condition adjustment (thickness gauge FS-60DS, The area of each part is 15 cm ² ) at a constant pressure of 3 g / cm ² , and the thickness after 10 seconds at each part is measured. The same measurement is performed for each of the 10 non-woven fabrics, and the average value of the total of 30 measurement values is defined as the dry thickness of the non-woven fabric. On the other hand, the wet thickness is measured as follows. Ten test pieces (length 10 mm × width 10 mm) cut out from the nonwoven fabric after condition adjustment are immersed in distilled water at 20 ° C. for 1 hour. Then, using a thickness meter (example: FS-60DS manufactured by Daiei Kagaku Seisakusho Co., Ltd., measuring element area 15 cm ² ), when using three different parts (thickness meter FS-60DS) of each test piece, The area of the part is 15 cm ² ) at a constant pressure of 3 g / cm ² , and the thickness after 10 seconds at each part is measured. The average value of a total of 30 measured values is defined as the wet thickness of the nonwoven fabric.

  This urine absorbing pad is suitable for absorbing urine of a person who frequently has difficulty changing diapers, such as a bedridden person or a physically handicapped person. This urine absorbing pad can absorb urine to a capacity close to the capacity allowed by the absorber, whereby urine is absorbed multiple times, for example, 3 times or more, preferably 4 times or more, more preferably 5 times or more. Can absorb without leaking. This urine absorption pad can be absorbed without leakage, for example, 400 mL or more, preferably 500 mL or more, more preferably 600 mL or more. For example, many bedridden elderly people (people over 65 years old) excrete a total of 400 mL or more of urine about three or more times a night. Therefore, if the urine absorbing pad can absorb at least three times or 400 mL of urine, the number of nightly urine collecting pad replacements is reduced. As a result, the elderly person is less likely to be disturbed to sleep at night, and the caregiver can omit the trouble of replacing absorbent articles at night, reducing the burden on care, specifically excretion. The

  According to the present invention, it is possible to provide a urine collecting pad capable of absorbing urine to a capacity close to that allowed by the absorber while preventing the absorber from collapsing.

  The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined and changed within a range not departing from the object and spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Urine collection pad 120 Top sheet 130 Back sheet 140 Absorber 140a Upper layer absorber 140b Lower layer absorber 141a Upper layer groove part 144 Absorbent core 145 Cover sheet

Claims (12)

A urine absorption pad comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned between the top sheet and the back sheet, and having a longitudinal direction, a width direction, and a thickness direction Because
The absorber comprises an upper layer absorber positioned on the skin side and a lower layer absorber positioned on the non-skin side,
The upper layer absorber has an upper layer groove portion extending in the longitudinal direction in the urination region and extending from the surface on the top sheet side to the inside of the upper layer absorber in the thickness direction,
The lower layer absorbent includes an absorbent core and a covering sheet that wraps the absorbent core,
The covering sheet covers the non-skin side surface of the absorbent core and both side surfaces in the width direction, and both end edges in the width direction of the covering sheet overlap on the skin side of the absorbent core. Wrapping the absorbent core so as to cover the skin side surface of the absorbent core,
The skin side surface of the absorbent core is non-bonded to the covering sheet,
One of the longitudinal directions is the ventral direction, the other is the dorsal direction,
The distance between one end in the width direction of the upper layer groove portion in the width direction and one end portion in the width direction of the urine removing pad, and the other end in the width direction of the other upper layer groove portion in the width direction And the other end of the urine absorption pad in the width direction is the distance between the upper abdominal end of the upper groove portion and the end of the urine absorption pad in the abdominal direction. Shorter than the distance and the distance between the upper layer dorsal end of the dorsal side of the upper layer groove and the dorsal end of the urine collecting pad,
The angle formed by the wall surface of one of the widthwise end portions in the upper layer groove portion and the other upper layer width direction end portion with respect to the bottom surface in the upper layer groove portion is the angle of the upper layer belly side end portion in the ventral direction of the upper layer groove portion. The angle formed by the wall surface with respect to the bottom surface in the upper layer groove portion and the angle formed by the wall surface of the upper layer back side end portion in the dorsal direction in the upper layer groove portion is more perpendicular to the angle formed with respect to the bottom surface in the upper layer groove portion. ,
The angle formed by the wall surface of the upper layer abdomen end portion in the upper layer groove portion with respect to the bottom surface in the upper layer groove portion, and the wall surface of the upper layer back side end portion in the upper layer groove portion formed with respect to the bottom surface in the upper layer groove portion. The corner is larger than the vertical,
Urine pad. The non-skin side surface of the upper layer absorbent body and the skin side surface of the covering sheet are non-joined.
The urine absorption pad according to claim 1. The upper layer absorber is wider in the width direction than the lower layer absorber,
The urine absorption pad according to claim 1, wherein a portion wider than the lower layer absorbent body is bonded to the back sheet. In the longitudinal direction, the basis weight of the adhesive between the top sheet and the back sheet at both ends of the urine picking pad is such that the top sheet and the back sheet other than the both ends of the urine pad Greater than the basis weight of the adhesive between,
The urine absorption pad according to any one of claims 1 to 3. The upper layer groove portion of the upper layer absorber penetrates in the thickness direction,
The absorbent core of the lower layer absorbent has a lower layer groove portion extending in the longitudinal direction and recessed in the thickness direction in the urination region,
The lower layer groove portion overlaps at least a part of the upper layer groove portion in the thickness direction,
The urine absorption pad according to any one of claims 1 to 4. The lower layer groove of the absorbent core penetrates in the thickness direction,
The region surrounding the non-skin side edge of the lower layer groove in the absorbent core is joined to the covering sheet,
The urine absorbing pad according to claim 5. One of the longitudinal directions is the ventral direction, the other is the dorsal direction,
The distance between the lower ventral side end in the ventral direction of the lower slot and the end in the ventral side of the urine collecting pad is the lower back end in the dorsal direction of the lower slot and the urine collecting Shorter than the distance from the end in the dorsal direction of the pad,
The angle formed by the wall surface of the lower layer belly side end portion in the lower layer groove portion with respect to the bottom surface in the lower layer groove portion is the wall surface of the lower layer back side end portion in the dorsal direction in the lower layer groove portion. Nearer perpendicular to the angle formed with the bottom surface in the lower groove,
The angle formed by the wall surface of the lower layer back side end portion in the lower layer groove portion with respect to the bottom surface in the lower layer groove portion is larger than vertical,
The urine absorption pad according to claim 5 or 6. The angle formed by the wall surface of the lower layer groove part with respect to the bottom surface in the lower layer groove part is closer to the vertical than the angle formed by the wall surface of the upper layer groove part with respect to the bottom surface in the upper layer groove part,
The urine absorption pad according to any one of claims 5 to 7. One of the longitudinal directions is the ventral direction, the other is the dorsal direction,
The distance between the upper-layer ventral end of the upper-layer groove in the ventral direction and the end of the urine-absorbing pad in the ventral-direction is equal to the upper-layer dorsal end of the upper-layer groove and the urine collecting Shorter than the distance from the end in the dorsal direction of the pad,
The angle formed by the wall surface of the upper layer ventral end portion in the ventral direction in the upper layer groove portion with respect to the bottom surface in the upper layer groove portion is the wall surface of the upper layer dorsal end portion in the dorsal direction of the upper layer groove portion. Nearer to the vertical than the angle formed with the bottom surface in the upper groove,
The urine absorption pad according to any one of claims 1 to 8. The upper layer absorber and the lower layer absorber include a polymer absorber and pulp fibers,
The ratio of the basis weight of the polymer absorbent to the basis weight of the polymer absorbent and the pulp fiber is larger in the upper absorbent body than in the lower absorbent body.
The urine absorption pad according to any one of claims 1 to 9. The surface sheet is a non-woven fabric having convex portions formed on the skin side surface,
The content rate of the thickness direction oriented fiber in the convex portion of the nonwoven fabric is larger than the content rate of the thickness direction oriented fiber in the portion other than the convex portion of the nonwoven fabric,
The wet thickness of the nonwoven fabric is 85% or more of the dry thickness of the nonwoven fabric,
The urine absorption pad according to any one of claims 1 to 10.   The absorptive core comprises a polymeric absorbent;
  The covering sheet includes a first skin side portion and a second skin side portion which are one and the other of both end portions in the width direction of the covering sheet that cover the skin side surface of the absorbent core. ,
  The first skin side portion covers the upper portion of the lower groove portion and the lower portion of the upper groove portion while covering the lower portion of the lower groove portion from one side to the other in the width direction in plan view. Extending between the core and the upper layer absorber other than the upper groove,
  The second skin side portion covers the upper portion of the lower groove portion and the lower portion of the upper groove portion while covering the lower portion of the lower groove portion from the other side in the width direction to the other side in a plan view. Extending to between the core and the upper layer absorber other than the upper groove,
  The urine absorbing pad according to claim 5.

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