TW201742606A - Urine collection pad - Google Patents

Abstract

Provided is a urine collection pad capable of absorbing urine up to almost the capacity of an absorbent body while preventing the absorbent body from disintegrating. This urine collection pad is provided with a front surface sheet (120), a back surface sheet (130) and an absorbent body (140). The absorbent body is provided with an upper absorbent body layer (140a) located on the skin side and a lower absorbent body layer (140b) located on the non-skin side. The upper absorbent body layer has an upper layer groove part (141a) in a urine excretion region, the upper layer groove part stretching in the longitudinal direction and extending from the front surface sheet side surface to the inside of the upper absorbent body layer in the thickness direction. The lower absorbent body layer comprises an absorbent core (144) and a cover sheet (145) wrapping the absorbent core. The cover sheet encloses the absorbent core in such a manner as to cover the non-skin side surface and both side surfaces in the width direction of the absorbent core and cover the skin side surface of the absorbent core in a state in which two edges in the width direction of the cover sheet overlap each other on the skin side of the absorbent core. The skin side surface of the absorbent core is not bonded to the cover sheet.

Description

Suction pad

The present invention relates to a urine absorbing pad.

The urine absorbing pad is a shimming shimming used for use in a disposable diaper, and is used, for example, by a bedridden person or a person who is not free from the body. Moreover, since it is assumed that it will be installed for a certain period of time, it is required to be able to absorb a large amount of urine. On the other hand, if a large amount of urine is absorbed, there is a possibility that the absorbent body is sampled, and a technique of preventing a large amount of urine from being absorbed by the absorber is reviewed.

For example, a disposable disposable diaper used in Patent Document 1 is disclosed as a technique for improving the absorption performance of an absorbent body. The disposable diaper of Patent Document 1 is disposed between the hydrophilic sheet covering the absorbent body and the top sheet, and/or between the hydrophilic sheet and the absorbent body, and is then fixed by an adhesive, on the long side. Extending in the direction, the weight of the center of the long-side direction in the center of the broad side direction is longer than that of the long-side direction, and the distance between the two sides of the long-side direction on both sides in the broad-side direction is more less. That is, reducing the amount of the adhesive applied to the central zone in the longitudinal direction to prevent urine When the absorbent body is blocked by the adhesive, the absorption performance is not impaired, and the adhesive is applied to prevent the absorber from being sampled. Further, Patent Document 2 discloses a technique in which the shape of the convex portion in which the absorbent article is formed on the top sheet and the liquid permeable property and the skin feel are improved even when the absorbent article is formed in a wet state.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-17470

[Patent Document 2] Japanese Patent No. 5683742

In the disposable disposable diaper of Patent Document 1, the joining of the top sheet and the peripheral sheet of the back sheet and the joining of the back sheet and the hydrophilic sheet are not explicitly shown in the specification and the drawings, but the technique is considered. In the case of common sense, it is conceivable that they can be fixed together with an adhesive. At this time, the portion on the skin side and the portion on the non-skin side of the hydrophilic sheet are fixed to the other member by the adhesive, and the volume of the region surrounded by the hydrophilic sheet cannot be increased. In this way, even if the absorbent body absorbs urine and wants to swell, the hydrophilic sheet can be swollen by the hydrophilic sheet, and the swelling can only reach the volume of the region surrounded by the hydrophilic sheet. Therefore, the amount of urine absorbed by the absorbent body is limited. As a result, the absorber cannot be used in capacity. At the limit, that is, the urine cannot be absorbed until the capacity allowed by the absorber, and the absorption performance of the absorber may not be sufficiently exhibited. In this case, a disposable disposable diaper can absorb less urine, for example, a person who is bedridden, a person who is not free, and the like, the number of disposable diapers changed at night, for those who For those caregivers, the burden of excretion increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a urine absorbing pad which can absorb urine until it is close to the allowable capacity of the absorbent body while preventing the absorber from being detached.

The urine absorbing pad of the present invention includes: (1) a liquid-permeable surface sheet, a liquid-impermeable back sheet, and an absorber between the surface sheet and the back sheet, and has a long side. a urine absorbing pad in a direction, a width direction, and a thickness direction, wherein the absorbent body includes an upper absorbent body positioned on the skin side and a lower absorbent body positioned on the non-skin side, wherein the upper absorbent body is in the urination region An upper layer groove extending from the surface of the surface sheet side toward the inside of the upper layer absorber in the longitudinal direction, wherein the lower layer absorber includes an absorbent core and a coating covering the absorbent core In the sheet, the cover sheet covers the non-skin side surface of the absorbent core and both side surfaces in the width direction, and both end edges of the cover sheet in the width direction are on the skin side of the absorbent core. Overlay the aforementioned state The absorbent core is wrapped around the skin side of the absorbent core, and the skin side surface of the absorbent core is not joined to the coated sheet.

In the urine absorbing pad, the upper layer absorbent body forms an upper groove portion which 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 joined to the coated sheet, that is, In response to the swelling of the absorbent core, the both end edges of the covering sheet in the widthwise direction are moved to the outside, and the volume of the inner region of the covering sheet can be increased. Thereby, most of the excreted urine can be absorbed by the movement of the upper layer of the urination area to the inside of the lower layer absorber, and the absorption of the urine of the lower layer absorber is increased even if the amount of urine absorbed by the lower layer absorber is increased. It is also possible to suppress the case where the coated sheet interferes with the swelling of the absorbent core. As a result, the lower absorbent body is not limited by the amount of urine absorbed, and the absorbent body can be used up to the limit of its capacity. At this time, the absorbent core of the lower absorbent body is swollen, and a part of the surface on the skin side of the absorbent core cannot be covered by the coated sheet, and there is a concern that the absorbent core is sampled. However, since the upper layer absorbent body is located on the skin side of the absorbent core, the upper side absorbent body covers the skin side surface of the absorbent core which the covering sheet cannot cover, and the situation in which the absorbent body is sampled can be prevented. In this way, while preventing the absorber from being sampled, the absorber can be used up to the limit of its capacity. That is, the absorbing pad can fully utilize the absorbing performance, and can reduce the burden on the wearer and the caregiver of the wearer.

The urine absorbing pad according to the above aspect (1), wherein (2) the non-skin side surface of the upper layer absorbent body is not joined to the skin side surface of the covering sheet.

In the present urine absorbing pad, since the coated sheet of the upper layer absorber and the lower layer absorber is not bonded, the coated sheet is less likely to restrict the movement by the upper layer absorber. According to this, when the absorbent core of the lower absorbent body is swollen, the both end edges of the coated laminate are not blocked by the upper absorbent body and can easily move outward in the widthwise direction. Thereby, while preventing the absorber from being sampled, the absorber can be used up to the limit of its capacity.

The urine absorbing pad according to the above aspect (1) or (2), wherein the upper layer absorber is wider than the lower layer absorber in the width direction. The wider portion of the aforementioned lower absorbent body is joined to the aforementioned inner sheet.

The urine absorbing pad is such that the upper absorbent body is wider toward the wide side than the lower absorbent body, and the wide portion thereof is joined to the inner sheet. At this time, in the broad side direction, the lower absorbent body absorbs urine and swells, and if both end edges reach the joint portion between the wide portion and the inner sheet, the substantially central portion of the lower absorbent body becomes the side toward the upper absorbent body. In other words, it is a shape that is convex toward the skin, and absorbs deformation in the widthwise direction of the lower absorbent body. By the deformation, the absorbent body is brought closer to the urination region of the wearer, and most of the excreted urine can be easily moved from the upper groove portion of the urination region toward the inside of the lower layer absorbent body. Thereby, while preventing the absorber from being sampled, the absorber can be used to a limit closer to its capacity.

The urinary absorbing pad according to any one of the above aspects (1), wherein the (4) is at both ends of the urine absorbing pad in the longitudinal direction. Between the aforementioned surface sheet and the aforementioned inner sheet The base amount of the adhesive is larger than the amount of the adhesive between the surface sheet and the inner sheet other than the both end portions of the urine absorbing pad.

When the absorbent core absorbs urine and is more swollen, the expansion force of the absorbent body becomes too strong, and a gap is formed at both end portions in the longitudinal direction, and there is a concern that the absorbent core is separated from both end portions in the longitudinal direction. In the urine absorbing pad, since many adhesives are applied to both end portions in the longitudinal direction of the urine absorbing pad, it is possible to prevent the absorbing body from being detached from both end portions in the longitudinal direction. Thereby, while preventing the absorber from being sampled, the absorber can be used up to the limit of its capacity.

The urine absorbing pad according to any one of the above aspects of the present invention, wherein the upper layer groove of the upper layer absorber penetrates the thickness direction, and the lower layer absorber In the wicking region, the urination region has a lower groove portion that is formed to extend in the longitudinal direction and is recessed in the thickness direction, and the lower groove portion overlaps at least a portion of the upper groove portion in the thickness direction.

Since the urine absorbing pad also has a lower layer groove formed in the lower layer absorbent body, urine can be introduced into the lower layer absorbent body on the non-skin side, and the absorbent body can be used to a limit closer to its capacity. Further, it is possible to suppress the state in which the urine spreads on the surface sheet and to be wet, and it is possible to prevent the wearer's skin from being wet and to maintain a dry state even when the absorbent body is used to the limit of the capacity.

The urine absorbing pad of the present invention may be the one described in the above (5). In the urethane gasket, the lower layer groove portion of the absorbent core is joined to the covering sheet in a region extending through the thickness direction and surrounding the non-skin side edge of the lower layer groove portion of the absorbent core.

In the urine absorbing pad, the non-skin side edge of the lower layer groove is fixed to the cover sheet by the region surrounding the non-skin edge of the lower groove portion of the absorbent core. Thereby, the shape of the lower groove portion can be maintained regardless of the movement of the wearer or the circulation of urine. Thereby, the performance of introducing urine into the lower absorbent body can be maintained, and the absorbent body can be used to a limit closer to its capacity.

The urine absorbing pad according to the above aspect (5) or (6), wherein (7) one of the longitudinal directions is a front side direction and the other is a back side direction, and the lower layer a distance between the lower end portion of the lower side of the groove portion in the front side and the end portion of the urine absorption pad in the front side direction is larger than a lower back end portion of the lower layer portion in the back side direction and the urine absorbing pad The distance between the end portions in the back side direction is shorter, and the angle formed by the wall surface of the lower layer side end portion with respect to the bottom surface in the lower layer groove portion is larger than the wall surface of the lower layer back end portion with respect to the lower layer groove portion. The angle formed by the bottom surface is closer to vertical.

Since the wall surface of the lower abdominal end portion is closer to the end of the urine absorbing pad than the wall surface of the lower back end portion, the urine leaking from the lower ventral end portion relatively easily reaches the end portion of the urine absorbing pad via the upper layer groove portion. . The urine absorbing pad is such that the wall surface of the lower ventral end portion is more vertical than the bottom surface of the lower layer back end portion and is steeper than the bottom surface in the lower layer groove portion. Therefore, it is difficult to make urine The lower end of the lower layer is leaked toward the end of the urine absorbing pad via the upper groove portion. Urine can be introduced into the interior of the lower absorbent body. Thereby, the performance of introducing urine into the lower absorbent body can be maintained, and the absorbent body can be used to a limit closer to its capacity.

The urine absorbing pad according to any one of the above aspects of the present invention, wherein (8) the wall surface of the lower layer groove portion is formed with respect to a bottom surface of the lower layer groove portion. The angle is closer to a vertical than an angle formed by the wall surface of the upper layer groove portion with respect to the bottom surface in the upper layer groove portion.

In the present urine absorbing pad, the wall surface of the lower groove portion is made steeper than the bottom surface of the upper groove portion with respect to the bottom surface in the groove portion. Therefore, since the wall surface of the upper groove portion is gentle, it is easy to introduce urine into the lower groove portion via the upper groove portion, and since the wall surface of the lower groove portion is steep, it is possible to prevent the urine which is introduced from leaking to the outside. Thereby, the absorber can be used to a limit closer to its capacity without leaking urine.

The urine absorbing pad according to any one of the above aspects of the present invention, wherein (9) one of the longitudinal directions is a front side direction and the other side is a back side. a direction in which the distance between the upper end portion of the upper layer side of the upper layer groove portion and the end portion of the urine absorption pad in the front side direction is larger than the upper layer side end portion of the upper layer groove portion in the back side direction and the suction The distance of the end portion in the back side direction of the urine pad is shorter, and the angle formed by the wall surface of the upper end portion of the upper layer with respect to the bottom surface of the upper layer groove portion is larger than the wall surface of the back end portion of the upper layer Inside the upper ditch The angle formed by the bottom surface is closer to vertical.

Since the wall surface of the upper end portion of the upper layer is closer to the end portion of the urine absorbing pad than the wall surface of the rear end portion of the upper layer, the urine leaking from the end portion of the upper ventral side relatively easily reaches the end portion of the urine absorbing pad. The urine absorbing pad is such that the wall surface of the upper ventral end portion is more vertical than the bottom surface of the upper layer back end portion and is steeper than the bottom surface in the upper layer groove portion. Therefore, it is possible to prevent the urine from leaking from the upper end portion of the upper layer toward the end portion of the urine absorbing pad, and the urine can be introduced into the inside of the lower layer absorbent body. As a result, the absorber can be used to a limit closer to its capacity without leaking urine.

The urine absorbing pad according to any one of the above aspects (1), wherein the one of the longitudinal direction is the ventral direction and the other is the back side. a direction of a distance between one end of the upper layer width direction of the upper layer groove portion and one end portion of the urine absorption pad in the width direction; and the width direction of the upper layer groove portion The distance between the end portion of the upper width direction of the one side and the other end portion of the urine absorption pad in the width direction is an upper end portion of the upper side of the upper layer groove portion in the ventral direction and the urine absorbing pad The distance between the end portion in the front side direction of the sheet and the distance between the end portion of the upper layer back side in the back side direction of the upper layer groove portion and the end portion of the urine absorbing pad in the back side direction are shorter, and the other one and the other An angle formed by a wall surface of one of the upper width direction end portions with respect to a bottom surface of the upper layer groove portion is an angle formed by a wall surface of the upper layer belly end portion with respect to a bottom surface of the upper layer groove portion, and the upper layer back Side wall surface The bottom of the upper layer groove The angle formed by the face is closer to vertical.

Since the wall surface at the end portion in the width direction of the upper layer is closer to the end portion of the urine absorbing pad than the wall surface of the upper end portion of the upper layer and the wall surface of the upper end portion of the upper layer, the urine leaking from the end portion of the upper side of the upper layer is relatively easy to reach. The end of the urine absorbing pad. In the present urine absorbing pad, the wall surface at the end portion in the width direction of the upper layer is made steeper than the wall surface of the upper end portion of the upper layer and the wall surface of the upper end portion of the upper layer, and is more steep with respect to the bottom surface in the upper layer groove portion. Therefore, it is possible to prevent the urine from leaking from the end portion of the upper layer width direction toward the end portion of the urine absorbing pad, and the urine can be introduced into the inside of the lower layer absorbent body. Thereby, the absorber can be used to a limit closer to its capacity without leaking urine.

The urine absorbing pad according to any one of the above aspects of the present invention, wherein the upper layer absorber and the lower layer absorber comprise a polymer absorber. The pulp fiber has a ratio of a base amount of the polymer absorber to a base amount of the polymer absorber and the pulp fiber, and the upper layer absorber is larger than the lower layer absorber.

In the present urine absorbing pad, since the ratio of the lower absorbent body to the upper absorbent pulp fiber is higher, urine can be introduced into the lower absorbent body. Thereby, the absorber can be used to a limit closer to its capacity.

The urine absorbing pad according to any one of the above aspects of the present invention, wherein the surface sheet is a non-woven fabric having a convex portion formed on a surface of the skin side. The content ratio of the thickness direction alignment fibers in the convex portion in the nonwoven fabric is higher than the aforementioned convexity in the nonwoven fabric. The content of the thickness direction alignment fibers in the portion other than the portion is larger, and the thickness of the nonwoven fabric when wet is 85% or more of the thickness of the nonwoven fabric during drying.

Since the surface sheet has a predetermined characteristic and a non-woven fabric having a convex portion formed on the surface of the skin side, the shape of the convex portion of the surface sheet can be maintained, and the clogging of the surface sheet can be suppressed, and the absorbent body can be used. To the limit closer to its capacity.

According to the present invention, there is provided a urine absorbing pad which can absorb urine to a capacity close to the allowable capacity of the absorbent body while preventing the object from being detached.

100‧‧‧Urine pad

120‧‧‧Surface

130‧‧‧ inside sheet

140‧‧‧ absorber

140a‧‧‧Upper absorber

140b‧‧‧lower absorber

141a‧‧‧Upper sulcus

144‧‧‧Absorbent core

145‧‧‧ Covered sheets

Fig. 1 is a plan view of a urine absorbing pad of an embodiment.

Fig. 2 is an exploded perspective view of a main part of the urine absorbing pad shown in Fig. 1 .

FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1. FIG.

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1. FIG.

Fig. 5 is a schematic view for explaining the action of the absorbent body of the urine absorbing pad shown in Fig. 1 .

Fig. 6 is a view showing the longitudinal direction of the groove portion of the urine absorbing pad shown in Fig. 1 Schematic representation of the shape.

Fig. 7 is a schematic view for explaining a shape in a widthwise direction of a groove portion of the urine absorbing pad shown in Fig. 1 .

Fig. 8 is a partial perspective view of a surface sheet of the urine absorbing pad shown in Fig. 1 .

FIG. 9 is a schematic view illustrating a method of manufacturing the surface sheet of FIG. 8. FIG.

[Formation for carrying out the invention]

Hereinafter, the urine absorbing pad of the embodiment will be described with reference to the drawings.

Fig. 1 to Fig. 4 show the configuration of the urine absorbing pad 100 of the present embodiment. 1 is a plan view of a urine absorbing pad 100, FIG. 2 is an exploded perspective view of a main portion of the urine absorbing pad 100, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. The urine absorbing pad 100 has a longitudinal direction L, a broad side direction W, and a thickness direction T, and further has a central axis CL extending in the longitudinal direction L through the center of the wide side direction W, and a longitudinal direction L. The center of the inter-turn portion (described later) is a central axis CW extending in the widthwise direction W. The direction toward the central axis CL and the direction away from each other are the inner side and the outer side of the wide side direction W, and the direction toward the central axis CW and the direction away from each are the inner side and the outer side of the longitudinal direction L. In addition, in FIG. 1, the front side or the front side of the longitudinal direction L is referred to as the upper side, and the lower side is referred to as the rear side of the longitudinal direction L or Back side. Further, in the present specification, the case where the urine absorbing pad 100 is viewed only in the thickness direction from the upper surface side is referred to as "looking up in view". The "skin side" and the "non-skin side" mean that when the wearer wears the urine absorbing pad 100, the wearer of the urine absorbing pad 100 is relatively close to the side of the wearer's skin and the far side.

As shown in FIG. 1 and FIG. 2, the urine absorbing pad 100 has a front side portion 111, a crotch portion 112, and a back side portion 113 which are arranged along the longitudinal direction, and has a long-side inter-turn portion as viewed in a plan view. The shape of the gourd narrowed in the center of 112. When the urine absorbing pad 100 is worn, the abdominal portion 111 abuts against the wearer's abdomen, the crotch portion 112 abuts against the wearer's crotch portion, and the back portion 113 abuts against the wearer's buttocks. / or back. The urine absorbing pad 100 has, for example, a size of 350 to 880 mm in the longitudinal direction L and a size of 160 to 460 mm in the widthwise direction W.

The urine absorbing pad 100 includes a surface sheet 120 and a back sheet 130 and an absorber 140. In addition, since the longitudinal direction L, the broad side direction W, the thickness direction T, the skin side, and the non-skin side of the urine absorbing pad 100 coincide with the surface sheet 120, the back sheet 130, and the absorber 140, even on the surface Similarly to the urine absorbing pad 100, the sheet 120, the back sheet 130, and the absorber 140 also use the longitudinal direction L, the broad side direction W, the thickness direction T, the skin side, and the non-skin side.

The surface sheet 120 is a liquid permeable sheet which is located on the skin side in the thickness direction T. The surface sheet 120 may, for example, be a liquid permeable non-woven fabric, a woven fabric, or a synthetic resin film having a liquid permeation hole formed therein. Any liquid permeable sheet such as a composite sheet. The inner sheet 130 is a liquid impermeable sheet located on the non-skin side in the thickness direction T. The inner sheet 130 may, for example, be a liquid impervious nonwoven fabric, a synthetic resin film, a composite sheet of a non-woven fabric and a synthetic resin film, or an arbitrary liquid-impermeable sheet such as an SMS non-woven fabric. The absorber 140 is a member having liquid absorption and liquid retention between the surface sheet 120 and the back sheet 130. The absorber 140 is provided with an upper layer absorber 140a positioned on the skin side and a lower layer absorber 140b including an absorbent core 144 and a coated sheet 145 covering the absorbent core 144 on the non-skin side. Examples of the material of the upper layer absorber 140a and the absorbent core 144 include pulp fibers, synthetic fibers, and polymer absorbents. The coated sheet 145 is, for example, a nonwoven fabric or a thin paper. Further, the number of layers of the absorber 140 is arbitrary. In the present embodiment, the absorber 140 further includes an upper sheet 140c located on the skin side of the upper layer absorber 140a. The upper sheet 140c may, for example, be a nonwoven fabric or a thin paper.

In the present embodiment, the urine absorbing pad 100 further includes a pair of leakage preventing walls 160 and 160 and an exterior sheet 170. The pair of leakage preventing walls 160 and 160 are liquid-impermeable sheets (not shown in FIG. 2) which are located on both sides in the width direction W of the surface sheet 120 and extend in the longitudinal direction L. The outer edge portion of the leakage preventing wall 160 in the widthwise direction W is fixed to the fixed end of the surface sheet 120, and the inner edge portion is the free end. An elastic member (not shown) extending in the longitudinal direction L is provided at the free end of the leakage preventing wall 160, and the pair of leakage preventing walls 160 and 160 are worn when facing The skin stands up sideways. 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). The material of the leakage preventing wall 160 and the exterior sheet 170 is not particularly limited, and for example, the material of the inner sheet 130 may be mentioned.

The skin-side surface of the absorbent body 140, that is, the skin-side surface of the upper sheet 140c and the surface sheet 120 are joined to each other by an adhesive (not shown) of a predetermined pattern, and the non-skin side of the absorbent body 140 The surface, that is, the non-skin side surface of the lower absorbent body 140b and the inner sheet 130 are joined to each other by an adhesive (not shown) of a predetermined pattern. Further, the surface sheet 120 and the back sheet 130 are joined to each other by a bonding agent (not shown) of a predetermined pattern on the peripheral portions. Further, the pair of leakage preventing walls 160, 160 and the surface sheet 120 are joined to each other by a predetermined pattern of an adhesive (not shown), and the outer sheet 170 and the inner sheet 130 are mutually adjacent to each other by a predetermined pattern. The agent (not shown) is joined. The outer sheet 170 and the pair of leakage preventing walls 160 and 160 are joined to each other by an adhesive (not shown) of a predetermined pattern on the peripheral portions. The basis weight (g/m ² ) of the subsequent agent is appropriately adjusted in consideration of materials, properties, and the like. The basis weight is, for example, 0.5 to 50 g/m ² , and desirably 1 to 20 g/m ² . The basis weight of the adhesive is the coating amount (mass) of the adhesive (the surface sheet 120, the inner sheet 130, the absorber 140, and the like) of a predetermined area to be coated in the urine absorbing pad 100 divided by the predetermined area. Calculated.

The thickness, the base amount, and the like of the upper layer absorber 140a and the lower layer absorber 140b are appropriately adjusted in consideration of the liquid absorbability of the absorber 140 and the like. The thickness of the upper layer absorber 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 , and desirably 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 , and desirably 200 to 300 g/m ² . The thickness of the absorber is measured by using a 100 mm × 100 mm absorber sample cut out from a urine absorbing pad, and a commercially available thickness measuring device (for example, using JA257 manufactured by PEACOCK Co., Ltd., measuring surface 50 mm (diameter), measuring pressure 3 g /cm ² ), as implemented in the next way. The five different portions of the absorber sample were pressurized at a constant pressure of 3 g/cm ² by a thickness measuring device, and the thickness after pressing for 10 seconds in each portion was measured, and the average value of the five measured values was measured. As the thickness (mm). The measurement of the basis amount of the 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 reading scale (for example, Electronic Scale HF-300 manufactured by Rigaku Kogyo Co., Ltd.), and the average value of the masses of the three test pieces was measured. The mass (g/m ² ) per unit area of the calculated absorber was used as the basis weight of the absorber.

The upper layer absorber 140a and the lower layer absorber 140b are preferably composed of a polymer absorber and a pulp fiber from the viewpoint of absorption performance. In this case, the ratio of the basis weight of the polymer absorber to the base amount of the polymer absorber and the pulp fiber (in the present embodiment, the base amount of the absorber), that is, the content of the polymer absorber, It is preferable that the upper layer absorber 140a is larger than the lower layer absorber 140b. In other words, the ratio of the basis amount of the pulp fiber to the amount of the base of the polymer absorbent and the pulp fiber, that is, the pulp The content of the fibers is preferably such that the lower layer absorber 140b is larger than the upper layer absorber 140a. In the urine absorbing pad 100, since the ratio of the lower absorbent body 140b to the pulp fibers of the upper absorbent body 140a becomes higher, urine can be further introduced into the lower absorbent body 140b. Thereby, the absorber 140 can be used until its capacity is closer to the limit. The basis weight of the polymer absorber is calculated by dividing the amount (mass) of the polymer absorber of the absorber to be prepared in a predetermined area by the predetermined area. The basis weight of the pulp fiber is calculated from the basis weight of the absorbent body minus the basis weight of the polymer absorbent body.

The upper layer absorber 140a has a substantially gourd shape having a length in the longitudinal direction L and a narrow center in the longitudinal direction L of the crotch portion 112 in plan view. The lower layer absorber 140b has a substantially rectangular shape that is long in the longitudinal direction L in plan view and short in the widthwise direction W. 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 widthwise direction W is shorter than the dimension in the widthwise direction W of the upper layer absorber 140a. Therefore, both end edges of the upper layer absorber 140a in the longitudinal direction L are located outside the both ends of the longitudinal direction L of the lower layer absorber 140b in the longitudinal direction L. Therefore, the upper layer absorber 140a is opposed to the lower layer absorber 140b. Both sides of the long side direction L are formed broadly. Further, both end edges of the upper layer absorber 140a in the width direction W are located outside the both edges of the width direction W of the lower layer absorber 140b in the longitudinal direction L. Therefore, the upper layer absorber 140a faces the lower layer absorber 140b. Both sides of the wide side direction W are formed broadly. Further, the upper sheet 140c has a substantially rectangular shape which is long in the longitudinal direction L and short in the widthwise direction W in plan view. shape. However, the dimension of the longitudinal direction L of the upper layer sheet 140c is the same as the dimension of the longitudinal direction L of the upper layer absorber 140a, and the dimension of the widthwise direction W is larger than the size of the ridge portion 112 of the width direction W of the upper layer absorber 140a. It is long and has a substantially rectangular shape that is shorter than the size of the front side portion 111 and the back side portion 113. Further, the shape of each structure of the absorber 140 in plan view is arbitrary.

As shown in FIGS. 3 and 4, in the lower absorbent body 140b, the absorbent core 144 has a non-skin side 144sc, a skin side 144sa, and both side faces 144sb of the widthwise direction W between the non-skin side 144sc and the skin side 144sa. 144sb. Moreover, the covering sheet 145 (core cladding layer) is a non-skin side portion 145sc that faces the non-skin side surface 144sc when the absorbent core 144 is wrapped, and both side portions 145sb and 145sb that face the side surfaces 144sb and 144sb, And a portion facing the skin side surface 144sa, and having two skin side portions 145sa1, 145sa2 including both end portions 145e1, 145e2 in the widthwise direction W. Further, the covering sheet 145 covers the non-skin side surface 144sc of the absorbent core 144 with the non-skin side portion 145sc, and covers both side surfaces 144sb and 144sb of the absorbent core 144 in the widthwise direction W by the both side portions 145sb and 145sb, and The two skin side portions 145sa1, 145sa2 are overlapped to cover the skin side surface 144sa of the absorbent core 144, and the absorbent core 144 is wrapped.

In the absorbent body 140, the non-skin side surface of the upper sheet 140c and the skin surface side surface of the upper layer absorber 140a are joined to each other by an adhesive (not shown) of 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 an adhesive (not shown) of a predetermined pattern. The basis weight (g/m ² ) of the subsequent agent is appropriately adjusted in consideration of the materials, performance, and the like of the urine absorbing pad 100. The basis weight is usually from 0.5 to 50 g/m ² , and desirably from 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 surface 144sa (ideally, the two side surfaces 144sb, 144sb) of the absorbent core 144 is not joined to the skin side portions 145sa1, 145sa2 (ideally, the side portions 145sb, 145sb) of the covering sheet 145, and therefore, is not followed by In addition, the both end portions 145e1 and 145e2 of the skin-side portions 145sa1 and 145sa2 of the cover sheet 145 are not joined to each other, and therefore are not joined by an adhesive or the like.

The action 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 view schematically illustrating the action of the absorber 140. As shown in Fig. 5(a), before use of the urine absorbing pad 100, the absorbent core 144 has, for example, a dimension W1 in the widthwise direction W and a dimension T1 in the thickness direction T. Then, when the urine absorption pad 100 is used to increase the amount of absorption of urine in the absorbent core 144, the absorbent core 144 is swollen, and the dimension in the widthwise direction W and the thickness direction T increases. When 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 bound to the absorbent core 144 by an adhesive or the like, the upper limit of the volume of the inner side of the covering sheet 145 is generated. At this time, the absorbent core 144 cannot be made larger than its volume, and the absorption of urine is restricted.

However, in the present embodiment, the skin side portions 145sa1, 145sa2, 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 bound to the absorbent core 144 by an adhesive or the like. Therefore, the skin side portions 145sa1, 145sa2, 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 region inside the covering sheet 145 can be increased. Therefore, the amount of absorption of urine in the lower layer absorber 140b is increased, and even if the absorbent core 144 of the lower layer absorber 140b expands in the width direction W and the thickness direction T, the skin side portions 145sa1, 145sa2 of the cover sheet 145 are flanked. The portions 145sb and 145sb can also be moved in accordance with the width direction W and the thickness direction T. That is, it is possible to suppress the covering sheet 145 from interfering with the swelling of the absorbent core 144. As a result, the lower absorbent body 140b is not limited by the amount of urine absorbed, and the absorbent body 140 can be used up to the limit of its capacity. For example, as shown in FIG. 5(b), the absorbent core 144 has a dimension W2 which is larger than W1 in the width direction W1 and T2 which is larger than the dimension T1 in the thickness direction T.

However, at this time, as the absorption amount of urine increases, the absorbent core 144 of the lower absorbent body 140b gradually swells, and as shown in Fig. 5(b), a part of the skin side surface 144sa of the absorbent core 144 does not appear to be obtained in a short time. The case where the covered sheet 145 is covered. As a result, it seems that there may be a case where the absorbent core 144 coated with the coated sheet 145 is not distorted. However, in the present embodiment, since the upper layer absorber 140a is located on the skin side of the absorbent core 144, it is covered with the upper layer absorber 140a. The skin side surface 144sa of the absorbent core 144 which is covered by the cover sheet 145 cannot prevent the absorber 140 from being out of shape. At this time, the cover sheet 145 and the upper layer absorber 140a may be joined to each other so as not to interfere with the operation of the cover sheet 145.

In the present embodiment, the covered sheet 145 and the upper layer absorber 140a are not joined. In other words, the skin side portions 145sa and 145sa of the cover sheet 145 and the non-skin side surface of the upper layer absorber 140a are not joined, and therefore, they are not joined by an adhesive or the like. Therefore, the cover sheet 145 is hardly restricted by the movement of the upper layer absorber 140a. By this means, even if the absorbent core 144 of the lower absorbent core 140b is swollen outward in the widthwise direction W, the skin side portions 145sa and 145sa of the covering sheet 145 are not easily hindered by the upper absorbent body 140a, and can be more easily oriented toward the broad side. The W moves outward, so that the volume of the inner region of the sheet 145 can be more greatly covered. That is, it is possible to more reliably suppress the case where the covering sheet 145 interferes with the swelling of the absorbent core 144.

In the present embodiment, as described above, the upper layer absorber 140a is formed wider than the lower layer absorber 140b in the width direction W side. At this time, the portion of the upper layer absorber 140a that is wider than the lower layer absorber 140b in the widthwise direction W is joined to the back sheet 130 by an adhesive on the non-skin side. At this time, in the widthwise direction W, the lower absorbent body 140b absorbs urine and swells, and if both end edges reach the joint portion between the wide portion and the inner sheet 130, there is no possibility of swelling in the widthwise direction W. Therefore, the substantially central portion of the lower layer absorber 140b faces the side of the upper layer absorber 140a, In other words, the skin is swelled toward the skin side, and the deformation in the widthwise direction W of the lower layer absorber 140b can be absorbed. The lower absorbent body 140b is convexly deformed toward the skin side, and the absorbent body 140 is brought closer to the wearer's excretory opening, that is, the absorbent body is closer to the urination region, and the excreted body can be excreted. Most of the urine is easily moved and absorbed from at least the upper groove portion 141a (described later) of the urination region toward the inside of the lower layer absorber 140b. In particular, in the present embodiment, the amount of absorption of urine in the absorber 140 is increased (the swelling of the lower layer absorber 140b is further increased), and when the absorption speed is lowered, it is preferable that the urination region is close to the absorber 140 to promote absorption of urine. Thereby, while the absorber 140 is prevented from being aliased, the absorber 140 can be used to a limit closer to its capacity.

In the present embodiment, as described above, the upper layer absorber 140a is formed wider than the lower layer absorber 140b in the longitudinal direction L. At this time, the portion of the upper layer absorber 140a that is wider than the lower layer absorber 140b in the longitudinal direction L is joined to the inner sheet by the adhesive on the non-skin side. At the same time, when the upper layer absorber 140a is formed wider than the lower layer absorber 140b in the width direction W, the auxiliary lower layer absorber 140b is convexly deformed toward the skin side, and the excreted urine can be allowed. Most of the movement is easily absorbed from the upper groove portion 141a (described later) toward the inside of the lower layer absorber 140b.

In the present embodiment, the amount of the adhesive between the surface sheet 120 and the back sheet 130 at both end portions E1 and E2 of the urine absorbing pad 100 shown in Fig. 1 in the longitudinal direction L is higher than that in the urine absorption. Both ends of the spacer 100 The amount of the adhesive between the surface sheet 120 other than the portions E1 and E2 and the inner sheet 130 is larger. Here, the both end portions E1 and E2 are regions having a predetermined length from the both end edges of the urine absorbing pad 100 in the longitudinal direction L, and include a region of a part of both ends of the absorber 140 on the inner side of the region. For example, a range of about 20% of the length of the urine absorbing pad 100 is obtained from both end edges of the urine absorbing pad 100. When the absorbent core 144 absorbs urine and is more swollen, the expansion force of the absorber 140 becomes too strong, and gaps are formed in the thickness direction T at both end portions E1 and E2 in the longitudinal direction L, and there may be an absorbent core 144. The case where the vicinity of the both end portions E1 and E2 in the longitudinal direction L is aliased. However, in the present urine absorbing pad 100, since a plurality of adhesives are applied to both end portions E1 and E2 of the urine absorbing pad 100, it is possible to prevent a gap from being formed at both end portions E1 and E2, and the absorbent body 140 is from two. The situation in which the ends E1 and E2 are out of shape. Thereby, while the absorber 140 is prevented from being aliased, the absorber 140 can be used up to the limit of its capacity.

In the present embodiment, in the width direction W, the base amount of the adhesive between the surface sheet 120 and the back sheet 130 in the region where the absorber is not present in the absorbent body 140 is also viewed in a plan view of the urine absorbing pad 100. The base amount of the adhesive between the surface sheet 120 and the inner sheet 130 in the region where the absorber exists in the absorbent body 140 can be made larger in a plan view than in the urine absorbing pad 100. When the absorbent core absorbs urine and swells more, the expansion force of the absorbent body is too strong, and a gap is formed at both end portions in the widthwise direction W, and the absorbent core 144 may be detached from both end portions in the widthwise direction W. . However, in the urine absorbing pad 100, in the wide side direction of the urine absorbing pad When a plurality of adhesives are applied to both end portions, it is possible to prevent the absorber from being detached from both end portions of the widthwise direction W. Thereby, while the absorber 140 is prevented from being aliased, the absorber 140 can be used up to the limit of its capacity.

As shown in FIGS. 2 and 3, the upper absorbent body 140a has an upper layer groove portion 141a which is recessed in the thickness direction T from the skin side toward the non-skin side. In the present embodiment, the upper groove portion 141a is a through hole penetrating the upper layer absorber 140a in the thickness direction T. The upper groove portion 141a is located in the crotch portion 112 of the urine absorbing pad 100, and extends in the longitudinal direction L through the center of the width direction W of the absorber 140. That is, the upper groove portion 141a is formed in the urination region. Thereby, before the excreted urine spreads on the surface sheet 120, that is, the skin side surface of the urine absorbing pad 100 is hardly soiled, the urine can be introduced into the lower layer absorber 140b via the upper layer groove portion 141a. The absorber 140 can be used up to the limit of its capacity. In particular, in the present embodiment, since the upper groove portion 141a is a through hole, urine can be introduced into the lower layer absorber 140b more quickly.

In the present embodiment, the upper layer groove portion 141a is a through hole, and the lower layer absorber 140b has a lower layer groove portion 141b which is recessed in the thickness direction T from the skin side toward the non-skin side. In the present embodiment, the lower groove portion 141b is a through hole penetrating the lower layer absorber 140b in the thickness direction T. The lower groove portion 141b is located in the crotch portion 112 of the urine absorbing pad 100, and extends in the longitudinal direction L through the center of the width direction W of the absorber 140. in. That is, the lower groove portion 141b is formed in the urination region. Further, the upper layer groove portion 141a and the lower layer groove portion 141b are formed to overlap at least partially in plan view. Thereby, when the excreted urine reaches the lower absorbent body 140b via the upper groove portion 141a of the upper layer absorbent body 140a, the urine can be introduced into the lower layer absorbent body 140b via the lower layer groove portion 141b, and the absorbent body 140 can be used to approach the same. The limit of capacity is up. In particular, in the present embodiment, since the lower groove portion 141b is a through hole, urine can be introduced more quickly into the inside of the lower layer absorber 140b.

In the present embodiment, the positions of the two through holes which are the upper groove portion 141a and the lower groove portion 141b are formed to coincide with each other in plan view (that is, the two through holes are formed to communicate with each other). As a result, the absorber 140 forms the groove portion 141 in which the upper groove portion 141a and the lower groove portion 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 can be introduced into the lower layer absorber 140b. The urine is sucked into the lower layer, and the lower absorbent body 140b absorbs the urine, and by preventing the liquid return to the upper absorbent body 140a, the dry feeling is maintained, that is, the back of the wet back can be reduced.

The size (length) in the longitudinal direction L and the dimension (width) in the widthwise direction W of the upper layer groove portion 141a and the lower layer groove portion 141b in plan view can be appropriately adjusted in consideration of the dimensions of the upper layer absorber 140a and the lower layer absorber 140b. . The width of the upper groove portion 141a is usually 5.0 to 50 mm, preferably 10 to 20 mm. The width of the lower groove portion 141b is the upper groove portion The width of 141a is equal or narrower than this, usually 5.0~40mm, ideally 10~15mm. The length of the upper groove portion 141a is usually 50 to 300 mm, preferably 50 to 200 mm, more preferably 50 to 150 mm. The length of the lower groove portion 141b is equal to or shorter than the length of the upper groove portion 141a, and is usually 30 to 250 mm, preferably 30 to 150 mm. Since the width and length of the upper groove portion 141a are equal to or larger than the width and length of the lower groove portion 141b, the work of laminating the upper layer absorber 140a and the lower layer absorber 140b will be absorbed even if it is slightly offset. The size of the groove portion 141 seen on the side surface of the surface sheet 120 of the body 140 is kept substantially constant. Further, since the inner wall surface of the groove portion 141 is increased in the inner wall surface of the groove portion 141, the absorption energy of the absorber 140 in the portion where the groove portion 141 is formed is improved.

Generally, in order to prevent the absorber from being twisted, after the absorber is covered with the cover sheet, there is a means for taking heat fusion or pressing. However, if these conditions are carried out, there is a concern that the volume of the absorbent body is reduced or that the absorbent body absorbs urine and swells, causing unintentional deformation and leakage of urine. Here, in the present embodiment, in order to prevent such a situation, it is preferable that substantially no such means is implemented.

6 and 7, the groove portion 141 of the absorber 140 and its peripheral portion are schematically shown in a cross-sectional view perpendicular to the widthwise direction W along the longitudinal direction L and perpendicular to the longitudinal direction L along the wide-side direction W. Cutaway view. In the drawings, the description of the upper sheet 140c is omitted, and the absorbent core 144 and the coated sheet 145 are integrally formed as the lower layer absorber 140b. Loaded. Here, the upper groove portion 141a includes wall faces SWU1 and SWU2 that are disposed to face the widthwise direction W along the longitudinal direction L, and a front side (ventral side) that faces the longitudinal direction W and the longitudinal direction L. Wall surface FWU and rear side (back side) wall surface BWU. Further, the lower groove portion 141b includes wall faces SWL1 and SWL2 that face each other in the longitudinal direction L and the widthwise direction W, and a front side (ventral side) wall surface that faces the longitudinal direction W and the longitudinal direction L. Wall surface BWU of FWL and rear side (back side). However, in Fig. 6, the left side in the longitudinal direction L is the front side (ventral side), and the right side is the rear side (back side). In addition, when the upper layer groove portion 141a is a through hole, the bottom surface BU of the upper layer groove portion 141a is a plane on which the non-skin side surface of the upper layer absorber 140a is artificially extended toward the through hole. In the same manner, when the lower layer groove portion 141b is a through hole, the bottom surface BL of the lower layer groove portion 141b is a plane that is intended to extend the non-skin side surface of the lower layer absorber 140b toward the through hole. Therefore, the bottom faces BU and BL are parallel to each other.

1 and 6, the distance between the lower abdominal end portion LL1 of the lower end portion of the lower layer groove portion 141b and the end portion in the abdominal direction of the urine absorbing pad 100 is smaller than the back side direction of the lower layer groove portion 141b. The distance between the lower back end LL2 of the end portion and the end portion of the urine absorbing pad 100 in the back side direction is shorter. Here, in the present embodiment, as shown in Fig. 6, the angle ?1 of the wall surface FWL of the lower layer end portion LL1 with respect to the bottom surface BL in the lower layer portion 141b is larger than the wall surface BWL of the lower layer back end portion LL2 with respect to The angle β2 formed by the bottom surface BL in the lower groove portion 141b is nearly perpendicular to the bottom surface BL, that is, steeper. Here, leaking from the lower ventral end LL1 The urine that has passed out relatively easily reaches the end portion of the urine absorbing pad 100 in the ventral direction via the upper groove portion 141a. However, since the above configuration is provided, it is possible to prevent the urine from leaking from the lower abdominal end portion LL1 toward the end portion of the urine absorbing pad 100 in the ventral direction via the upper layer groove portion 141a. Thereby, urine can be further introduced into the inside of the lower absorbent body 140b. As a result, the absorber 140 can be used to a limit closer to its capacity without leaking urine.

1 and 6, the distance between the upper abdominal end portion LU1 as the end portion of the upper layer groove portion 141a in the abdominal direction and the end portion in the abdominal direction of the urine absorbing pad 100 is smaller than the back side direction of the upper layer groove portion 141a. The distance between the upper back end portion LU2 of the end portion and the end portion of the urine absorbing pad 100 in the back side direction is shorter. Here, in the present embodiment, as shown in Fig. 6, the angle ?1 between the wall surface FWU of the upper abdominal end portion LU1 and the bottom surface BL in the upper groove portion 141a is larger than the wall surface BWU of the upper back end portion LU2 with respect to The angle α2 formed by the bottom surface BL in the upper groove portion 141a is nearly perpendicular to the bottom surface BU, that is, steeper. Here, the urine leaking from the upper abdominal end portion LU1 relatively easily reaches the end portion of the urine absorbing pad 100 in the abdominal direction. However, since the above configuration is provided, it is possible to prevent urine from leaking from the upper abdominal end portion LU1 toward the end portion of the urine absorbing pad 100 in the ventral direction. Thereby, urine can be further introduced into the inside of the lower absorbent body 140b. As a result, the absorbent body 140 can be used to a limit closer to its capacity without leaking urine.

In the present embodiment, as shown in FIGS. 6 and 7, the wall faces FWL, BWL, SL1, and SL2 of the lower groove portion 141b are opposed to the lower groove. The angles β1, β2, β3, and β4 formed by the bottom surface BL in the portion 141b are larger than the angles α1, α2, α3, and α4 formed by the wall surfaces FWU, BWU, SU1, and SU2 of the upper layer groove portion 141a with respect to the bottom surface BU in the upper layer groove portion 141a. It is closer to vertical than the bottom faces BU, BL, that is, steeper. In other words, the wall faces FWU, BWU, SU1, and SU2 of the upper groove portion 141a are made gentler than the bottom faces BL and BU of the groove portion 141 than the wall faces FWL, BWL, SL1, and SL2 of the lower groove portion 141b. Therefore, with the above-described configuration, since the wall surfaces FWU, BWU, SU1, and SU2 of the upper layer groove portion 141a are gentle, it is easy to introduce urine into the lower layer groove portion 141b via the upper layer groove portion 141a, and the wall surfaces FWL and BWL of the lower layer groove portion 141b are The SL1 and SL2 are steep, so that the urine that is introduced once is not easily leaked to the outside. Thereby, the urine is further introduced into the lower layer, and the lower absorbent body 140b absorbs the urine to prevent the liquid return to the upper absorbent body 140a, maintains the dry feeling (reduced rewet), and does not leak urine, and the absorbent body 140 can be used more. Close to the limit of its capacity.

As can be seen from FIG. 1, FIG. 6, and FIG. 7, the distance between the upper end portion of the upper layer groove portion 141a in the width direction W and the one end portion of the side of the urine absorbing pad 100 in the width direction W, and the upper layer The distance between the other side width direction end portion WU2 of the groove portion 141a and the other end portion of the urine absorption pad 100 in the width direction W is the upper ventral side in the ventral direction of the upper layer groove portion 141a. The distance between the end portion LU1 and the end portion in the abdominal direction of the urine absorbing pad 100 and the distance between the upper back side end portion LU2 of the upper layer groove portion 141a in the back side direction and the end portion of the urine absorbing pad 100 in the back side direction are further short. In this embodiment, as shown in FIGS. 6 and 7 The angles α3 and α4 formed by the wall surfaces SU1 and SU2 of the upper and lower widthwise end portions WU1 and WU2 of one of the upper and lower sides with respect to the bottom surface BU of the upper layer groove portion 141a are opposite to the wall surface FWU of the upper abdominal end portion LU1. The angle α1 formed by 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 end portion LU2 with respect to the bottom surface BU in the upper layer groove portion 141a are closer to the vertical than the bottom surface BU, that is, steep. According to the above configuration, it is possible to prevent the urine from leaking from the end portions of the upper side width direction WU1 and WU2 toward the end portion of the urine absorbing pad. Thereby, urine can be introduced into the inside of the lower absorbent body 140b. As a result, reducing back bleed can use the absorbent body 140 to a limit closer to its capacity without leaking urine.

However, the above-described methods of measuring the respective angles α1 to α4 and β1 to β4 are performed as follows. An X-ray fluoroscopy device FLEX-M863 manufactured by Beamsense Co., Ltd. was used. The sample was cut into 20×40 mm centered on the groove, and the slice sample was rotated at 0.2 degrees for 360 degree scanning. Thereafter, the photographed 1800 images were joined to form a 3D image. Further, a cross-sectional view in the longitudinal direction L and a cross-sectional view in the broad-side direction W are extracted from the 3D image, and the angles α1 to α4 and β1 to β4 are measured from the map. In the bottom surface BU, when the upper layer groove portion 141a is a through hole, the surface on the non-skin side of the upper layer absorber 140a is a plane that is virtually extended by the through hole, and the bottom surface BL is the lower layer groove portion 141b as a through hole, and the lower layer absorber 140b is used. The non-skin side surface is a plane that is imaginarily extended by the through hole. Therefore, the bottom faces BU and BL are parallel to each other.

In the present embodiment, the lower layer portion of the absorbent core 144 141b penetrates in the thickness direction T. At this time, a region surrounding the non-skin edge of the lower groove portion 141b of the absorbent core 144 (an annular region surrounding the through hole of the lower groove portion 141b, at least in a range of the upper groove portion 141a in plan view) and the covering sheet 145 are included. Engage. According to such a configuration, the region on the non-skin side surface 144sc surrounding the non-skin side edge of the lower layer groove portion 141b in the absorbent core 144 is bonded to the non-skin side portion 145sc of the covering sheet 145 by an adhesive, The position of the non-skin side edge of the lower groove portion 141b is fixed to the covering sheet 145. Thereby, the shape of the lower layer groove portion 141b can be maintained regardless of the movement of the wearer or the circulation of urine. Thereby, the performance of introducing urine into the lower absorbent body can be maintained, and the absorbent body 140 can be used to a limit closer to its capacity.

In the present embodiment, the surface sheet 120 is formed of a nonwoven fabric in which a convex portion is formed on the skin side surface. Fig. 8 is a partial perspective view of the surface sheet 120 (non-woven fabric). The surface sheet 120 is formed with a ridge portion 122 (an example of a convex portion) on the skin side surface 121. The ridges 122 are extended in the longitudinal direction L, and are arranged in the widthwise direction W at predetermined intervals, and one groove portion 123 is formed between the adjacent two ridges 122. The urine excreted by such a surface sheet 120 is easily diffused in the longitudinal direction L along the ridge portion 122 and the groove portion 123, thereby preventing the diffusion of urine in the widthwise direction W and the leakage of urine from the urine absorbing pad 100 for this reason. And ideal. In addition, in FIG. 1, one ridge 122 is shown as the area between the adjacent two lines, and one groove 123 is shown by one line. Moreover, in order to simplify the drawing, a part of the ridge structure 124 formed on the skin side surface 121 is omitted in FIG. In FIGS. 2 to 4, the ridge structure 124 is omitted.

Further, the content ratio of the oriented fibers in the thickness direction T in the ridge portion 122 (the convex portion) of the surface sheet 120 is larger than the content ratio of the oriented fibers in the thickness direction T in the portion other than the convex portion in the surface sheet 120. When the surface sheet 120 is wet, the thickness is preferably 85% or more of the thickness of the surface sheet 120 when it is dried. The surface sheet 120 has a first fiber layer having a skin side surface 121 and a second fiber layer located on the absorber side of the first fiber layer, and the first fiber layer is composed of fibers having durable hydrophilicity, and the second fiber The layer is more preferably composed of a fiber having durable hydrophilicity and a fiber layer having non-durable hydrophilicity.

The thickness t1 of the ridge portion 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 portion 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 ridge is measured by a laser displacement meter (for example, a high-precision 2-dimensional laser displacement meter LJ-G series (type: LJ-G030) manufactured by Keyence Co., Ltd.), which is cut out from the urine absorbing pad. The 100 mm × 100 mm surface sheet sample was placed on a horizontal measuring table. For different 5 ridges, the displacement from the measuring table was measured with a laser displacement meter, and the average of the 5 measured values was taken as the thickness of the ridge ( Mm). Similarly, the displacement from the measuring table was measured with a laser displacement meter for the different five grooves, and the average of the five measured values was taken as the thickness (mm) of the groove portion. The measurement of the width of the ridge is based on a bird's-eye view or a bird's-eye view of the surface sheet sample in the unpressurized state, and measures the distance between the ridge portion and the boundary line between the two groove portions located on both sides. The width of the groove is also the same.

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

For the method of manufacturing the nonwoven fabric, for example, the method described in Japanese Patent No. 5,683,742 can be used. According to this method, in the manufacturing apparatus schematically shown in FIG. 9, the fiber web W is placed on the air permeable supporting member 310 (for example, the mesh supporting member), and the air permeable supporting member 310 is moved in a predetermined direction while being ejected. The portion 330 continuously ejects the gas G toward the upper surface of the fiber web W at a plurality of injection ports 332 formed at predetermined intervals. The gas G passing through the air permeable supporting member 310 is sucked by the air suction portion disposed below the injection portion 330. A groove portion 123 extending in the moving direction of the air-permeable supporting member 310 is formed in a region where the gas G is ejected in the upper surface of the fiber web W, and a ridge portion 122 is formed between the adjacent two groove portions 123. Thereby, the ridge groove structure 124 can be formed in the fiber web W.

However, the oriented fiber in the thickness direction T means a fiber oriented in an angular range of +45 to -45 degrees with respect to the thickness direction T. The method for measuring the content ratio of the thickness direction alignment fibers in the predetermined portion of the nonwoven fabric for the surface sheet is as follows. (1) Cut non-woven fabric, make no Weaving samples. (2) Using a digital microscope VHX-100 manufactured by Keyence Co., Ltd., an enlarged image from the vertical direction was taken on the cut surface of the nonwoven fabric sample. The magnified image is an image of a magnification that is magnified to 50 or more fibers, and the magnification is, for example, 20 to 50 times. When shooting an enlarged image, the focal length is focused on the fiber on the foremost side of the cut surface of the non-woven sample (excluding the fiber that irregularly protrudes to the front side), and the shooting depth (depth of field) is set. The magnified image is created as a 3D image on a PC screen. (3) Converting the 3D image into a 2D image, and pulling out a plurality of lines extending in parallel in the thickness direction of the non-woven sample on the 2D image, and calculating an angle of +45 degrees to -45 degrees with respect to the thickness direction of the non-woven sample. The number of oriented fibers. (4) Calculate the ratio of the number of whole fibers in the measurement range with respect to the calculated number of fibers. (5) Repeating (1) to (4) (for example, 3 to 5 times) several times, and using the average value as the content ratio of the fibers in the thickness direction.

The measurement of the thickness at the time of drying and the thickness at the time of wetting is a non-woven fabric for the surface sheet which is adjusted beforehand. The state adjustment of the non-woven fabric was carried out by storing the non-woven fabric in a dry state in a standard state (temperature 23 ± 2 ° C, relative humidity 50 ± 5%) for 24 hours or more. The non-woven fabric in a dry state is usually a nonwoven fabric having a moisture content of usually 12% or less, preferably 10% or less. The thickness at the time of drying was measured as follows. We use a thickness meter (for example, FS-60DS manufactured by Daiei Scientific Seiki Co., Ltd., gauge head area: 15 cm ² ), and three different parts of the non-woven fabric adjusted under a constant pressure of 3 g/cm ² (using thickness) When the FS-60DS was used, the area of each part was 15 cm ² ), and the thickness after pressing for 10 seconds in each part was measured. The same measurement was performed for each of the 10 non-woven fabrics, and the average of the total of 30 measured values was taken as the thickness of the nonwoven fabric during drying. On the other hand, the thickness at the time of wetting was measured as follows. Ten test pieces (length 10 mm × width 10 mm) cut out from the state-adjusted non-woven fabric were immersed in distilled water of 20 ° C for 1 hour. Next, a thickness meter (for example, FS-60DS manufactured by Daiei Scientific Seiki Co., Ltd., gauge head area: 15 cm ² ) was used, and three different portions of each test piece were pressed at a constant pressure of 3 g/cm ² (using a thickness gauge) In the case of FS-60DS, the area of each part was 15 cm ² ), and the thickness after pressing for 10 seconds in each part was measured. The average value of the total of 30 measured values was taken as the wet thickness of the nonwoven fabric.

The urine absorbing pad is suitable for the urine of a person who has difficulty in frequently changing the disposable diaper, such as a person who is bedridden, a person who is not free from the body, and the like. The urine absorbing pad absorbs urine to a capacity close to that of the absorbent body, and can absorb urine in a plurality of times, for example, three times or more, preferably four times or more, more preferably five times or more. Absorb urine without missing. The amount of the urine absorbing pad is, for example, absorbing 400 mL or more, preferably 500 mL or more, more preferably 600 mL or more. For example, the majority of bedridden elderly people (people over 65 years old) excrete 400 mL of urine for about 3 times a night. Therefore, as long as the urine absorbing pad can absorb at least three times or absorb 400 mL of urine, the number of times of replacement of the urine absorbing pad at night becomes small. Therefore, the elderly person is not easily hindered from sleeping at night, and the caregiver can omit the work of replacing the absorbent article at night, reducing the care, and specifically reducing the burden of urination.

According to the present invention, it is possible to provide a urine absorbing pad which can absorb urine until it is close to the allowable capacity of the absorbent body while preventing the object from being detached.

The absorbent article of the present invention is not limited to the above-described embodiments, and may be appropriately combined, modified, or the like without departing from the spirit and scope of the invention.

121‧‧‧ Skin side surface

120‧‧‧Surface

124‧‧‧ Ridge structure

140‧‧‧ absorber

140a‧‧‧Upper absorber

140b‧‧‧lower absorber

140c‧‧‧Upper sheet

141a‧‧‧Upper sulcus

141b‧‧‧lower absorber

144‧‧‧Absorbent core

145‧‧‧ Covered sheets

130‧‧‧ inside sheet

T‧‧‧ thickness direction

W‧‧‧Broadside direction

L‧‧‧Longside direction

Claims (12)

A urine absorbing pad comprising: a liquid permeable surface sheet, a liquid impervious back sheet, and an absorber between the surface sheet and the back sheet, and having a longitudinal direction, a broad side direction, and The urine absorbing pad of the thickness direction is characterized in that the absorbent body includes an upper absorbent body positioned on the skin side and a lower absorbent body positioned on the non-skin side, and the upper absorbent body has an extension in the urination region. The longitudinal direction extends from the surface of the surface sheet side toward the thickness direction to the upper layer portion of the upper layer absorber, and the lower layer absorber includes an absorbent core and a coated sheet covering the absorbent core, and the coating The sheet covering the non-skin side surface of the absorbent core and the side surfaces in the wide side direction, and the both end edges of the covering sheet in the wide side direction are superposed on the skin side of the absorbent core. The absorbent core is covered with a surface covering the skin side of the absorbent core, and the skin side surface of the absorbent core is not joined to the coated sheet. The urine absorbing pad according to the first aspect of the invention, wherein the non-skin side surface of the upper layer absorbent body is not joined to the skin side surface of the covering sheet. The urine absorbing pad according to the first or second aspect of the invention, wherein the upper layer absorber is larger than the lower layer absorber The direction is wider, and a wider portion than the aforementioned lower absorbent body is joined to the aforementioned inner sheet. The urine absorbing pad according to claim 1, wherein a base amount of the adhesive between the surface sheet and the inner sheet at both end portions of the urine absorbing pad in the longitudinal direction is The amount of the binder between the surface sheet other than the aforementioned end portions of the urine absorbing pad and the inner sheet is larger. The urine absorbing pad according to the first aspect of the invention, wherein the upper layer groove portion of the upper layer absorbent body penetrates the thickness direction, and the absorbent core of the lower layer absorbent body has an extending portion provided on the long side in the urination region The direction of the lower layer groove 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. The urinary absorbing pad according to the fifth aspect of the invention, wherein the lower layer groove portion of the absorbent core penetrates the thickness direction, and surrounds a non-skin side edge of the lower layer groove portion of the absorbent core and the aforementioned The coated sheets are joined. The urine absorbing pad according to claim 5, wherein one of the longitudinal directions is a front side direction, and the other is a back side direction, and the lower ventral end portion of the lower layer groove portion in the ventral direction. With the foregoing The distance of the end portion in the front side direction of the urine absorbing pad is shorter than the distance between the lower back end portion of the lower layer groove portion in the back side direction and the end portion of the urine absorbing pad in the back side direction, the lower layer The angle formed by the wall surface of the front end portion with respect to the bottom surface in the lower layer groove portion is closer to the vertical than the angle formed by the wall surface of the lower layer back end portion with respect to the bottom surface in the lower layer groove portion. The urine absorbing pad according to claim 5, wherein an angle formed by a wall surface of the lower layer groove portion with respect to a bottom surface of the lower layer groove portion is larger than a bottom surface of the upper layer groove portion with respect to a bottom surface of the upper layer groove portion The angle formed is closer to vertical. The urine absorbing pad according to claim 1, wherein one of the longitudinal direction is a front side direction and the other is a back side direction, and an upper ventral end portion of the upper layer groove portion in the ventral direction is the aforementioned The distance of the end portion in the front side direction of the urine absorbing pad is shorter than the distance between the end portion of the upper layer back side of the upper layer groove portion in the back side direction and the end portion of the urine absorbing pad in the back side direction, the upper layer The angle formed by the wall surface of the front 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 back end portion with respect to the bottom surface in the upper layer groove portion. The urine absorbing pad according to the first aspect of the invention, wherein one of the longitudinal direction is a front side direction, and the other is a back side direction, and one of the upper side width directions of the upper layer groove portion a distance between the end portion and one end portion of the urine absorbing pad in the wide side direction; and the other upper side width direction end portion of the upper layer groove portion in the width direction and the aforesaid urine absorbing pad The distance between the other end portion in the width direction is a distance from the upper end portion of the upper side of the upper layer groove portion in the front side direction and the end portion in the front side direction of the urine absorbing pad, and the upper layer groove portion The distance between the upper back end portion of the back side direction and the end portion of the urine absorbing pad in the back side direction is shorter, and the wall surface of the one of the upper and the other upper width direction end portions is opposite to the upper layer groove portion. An angle formed by the bottom surface is an angle formed by a wall surface of the upper end portion of the upper layer with respect to a bottom surface of the upper layer groove portion, and an angle formed by a wall surface of the back end portion of the upper layer with respect to a bottom surface of the upper layer groove portion Closer to vertical. The urine absorbing pad according to the first aspect of the invention, wherein the upper layer absorber and the lower layer absorber comprise a polymer absorber and a pulp fiber, and a base amount of the polymer absorber is relative to the polymer absorption The ratio of the body to the base amount of the pulp fibers added is such that the upper layer absorber is larger than the lower layer absorber. The urinary absorbing sheet according to claim 1, wherein the surface sheet is a non-woven fabric in which a convex portion is formed on a surface of the skin side, and a content ratio of the fibers in the thickness direction of the convex portion in the nonwoven fabric is higher than the above. Thickness direction alignment in a portion other than the aforementioned convex portion in the nonwoven fabric The content of the fiber is larger, and the thickness of the nonwoven fabric when wet is 85% or more of the thickness of the nonwoven fabric when it is dried.