KR102515858B1 - absorbent article - Google Patents

Abstract

In an absorbent article having a pair of heat-embossed portions, an absorbent article capable of efficiently using an absorber as a whole is provided. The absorbent body 4 of the absorbent article includes a superabsorbent polymer and heat-sealable fibers. The absorbent article has a pair of heat embossed portions 5, 5 arranged at intervals in the width direction. Each heat embossed portion extends along the longitudinal direction and is recessed from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorber in the thickness direction, and is intermittently located along the longitudinal direction A plurality of rows A fused portion 5t is included. The heat-sealed portion does not contain pulp fibers. The superabsorbent polymer is present in at least a region between adjacent heat-sealed parts in the longitudinal direction among the plurality of heat-sealed parts.

Description

absorbent article

The present invention relates to an absorbent article.

An absorbent article is known which includes a topsheet and an absorbent body positioned on the non-skin side of the topsheet, and has a pair of embossed portions arranged at intervals in the width direction. For example, Patent Literature 1 discloses an absorbent article including a topsheet, an absorber (absorbent sheet) positioned on the non-skin side of the topsheet, and having a pair of embossed portions arranged at intervals in the width direction. Each embossed portion continuously extends along the longitudinal direction and has a shape that is recessed from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber (absorbent sheet) in the thickness direction.

Patent Document 1: Japanese Unexamined Patent Publication No. 2017-158654

In the absorbent article described in Patent Literature 1, there are cases where a heat embossed portion is used as the embossed portion. The heat embossed portion is formed by heat-sealing the surface sheet and the absorber while being compressed. However, if the topsheet or the absorber contains fibers that do not have thermal melting properties such as pulp fibers, the adhesive strength of the thermally embossed portion may decrease. Then, by continuously extending the heat embossed portion along the longitudinal direction, the bonding strength of the entire heat embossed portion can be increased, and peeling of the heat-sealed portion of the heat embossed portion can be suppressed. And, each of the pair of heat embossing parts, excretion (eg: urine) reaching the heat embossing part directly from the upper side or through the surface of the topsheet, through the concave part of the heat embossing part continuously extended along the longitudinal direction. , can be circulated in the forward and backward directions in the longitudinal direction. However, since the heat-embossed portion is formed by melting and hardening fibers with heat, liquid cannot permeate and diffuse into the inside. Therefore, it is difficult for excretion to diffuse from the area|region between a pair of heat-embossed parts to the area|region of the outer side of the width direction beyond each heat-embossed part. Therefore, when excretion is absorbed in the region between the pair of thermal embossing parts in the absorber, it diffuses in the absorber toward the outside in the width direction, but is blocked by the pair of thermal embossing parts, and is substantially blocked by the pair of thermal embossing parts. It is difficult to spread to the absorber outside the boss part. Therefore, it is difficult to sufficiently absorb excretion in a portion outside the pair of heat-embossed portions in the absorber in the width direction, and it is difficult to efficiently use the absorber.

Then, the object of this invention is to provide the absorbent article which can use an absorbent body efficiently as a whole in the absorbent article which has a pair of heat-embossed part.

The absorbent article of the present invention is as follows. (1) An absorbent article comprising a topsheet and an absorbent body positioned on a non-skin side of the topsheet in the longitudinal direction, the width direction, and the thickness direction, wherein the absorbent body includes a superabsorbent polymer and heat-sealable fibers. wherein the absorbent article has a pair of thermal embossed portions arranged at intervals in the width direction, each of the pair of thermal embossed portions extends along the length direction, and extends along the length direction of the topsheet in the thickness direction. A plurality of heat-sealed portions recessed from the skin-side surface toward the non-skin-side surface of the absorber and intermittently positioned along the longitudinal direction, wherein the plurality of heat-sealed portions do not contain pulp fibers, The absorbent article according to claim 1 , wherein the superabsorbent polymer is present in at least a region between adjacent heat-sealed parts in the longitudinal direction among the plurality of heat-sealed parts.

In this absorbent article, the pair of heat-embossed portions have a plurality of heat-sealed portions intermittently positioned in the longitudinal direction, and each heat-sealed portion does not contain pulp fibers.

In this way, since the heat-sealed portion is formed without including pulp fibers, which are an absorbent material that is difficult to be heat-sealed, the bonding strength of the heat-sealed portion can be increased. That is, even if it does not form a heat fusion part (heat embossing part) continuously along the longitudinal direction, it can make it into the state which is hard to peel. Therefore, since it is not necessary to continuously form the heat-sealed portion in a groove-like manner along the longitudinal direction, the excretion can be diffused more widely outward than the pair of heat-embossed portions through the region between the plurality of intermittently formed heat-sealed portions. .

In addition, excretion is disposed near the center of the absorbent article and spreads at approximately the same speed in the width direction and the length direction in the absorbent body, easily reaching the pair of heat embossed portions in the width direction. Therefore, in the width direction, in the initial stage of absorption of excretion by the absorber, for example, at the first time of absorption of excretion, the excretion spreading in the width direction is blocked by the heat-sealed portion, and the excretion is transferred between adjacent heat-sealed portions. area can be induced. That is, excretion can be distributed to a region between adjacent heat-sealed portions where the superabsorbent polymer exists. And the excretion which passed through the area|region between adjacent heat-sealing parts can be guide|guided|guided to the absorber outside the width direction W of a pair of heat embossing part. As a result, the excretion can be absorbed by the outer absorber.

At that time, as the excretion flows through the area between the adjacent heat-sealed parts, the super-absorbent polymer present in the area between the adjacent heat-sealed parts absorbs the excretion and gradually swells, and eventually the area between the adjacent heat-sealed parts is obstructed so that excretion becomes difficult to distribute.

Therefore, at the subsequent absorption of excretion by the absorber, for example, at the time of absorption of excretion for the second time, the excretion is blocked by the superabsorbent polymer present in the region between the plurality of fused portions and the adjacent heat-sealed portion. It becomes impossible to spread outward in the width direction rather than a pair of thermal embossing part. Thereby, excretion can be diffused forward and backward in the longitudinal direction where there is room for absorption. Moreover, it can prevent that excretion spreads too much outward in the width direction rather than a pair of heat embossing part, and leaks outward in the width direction.

Therefore, excretion can be absorbed over a wide range in the width direction and the length direction. This makes it possible to efficiently use the absorber as a whole. In addition, even when the amount of excretion is large, such as multiple times of excretion, leakage of excretion without being absorbed can be prevented.

In the absorbent article of the present invention, (2) the distance between adjacent heat-sealed parts in the plurality of heat-sealed parts is 0.5 mm or more and 5 mm or less, and the basis weight of the superabsorbent polymer between the adjacent heat-sealed parts The absorbent article described in the above (1) having a silver content of 20 g/m 2 or more and 80 g/m 2 or less may be used.

In this absorbent article, the distance between heat-sealed portions is 0.5 mm or more and 5 mm or less, and the basis weight of the superabsorbent polymer is 20 g/m 2 or more and 80 g/m 2 or less. That is, a superabsorbent polymer having a predetermined basis weight is disposed in a region between predetermined thermally fused portions. As a result, it is possible to initially allow excretion to flow between adjacent heat-sealed portions, and thereafter, it is possible to block excretion with the swollen superabsorbent polymer.

In the absorbent article of the present invention, (3) the length in the longitudinal direction in each of the pair of heat embossed portions is 30% or more and 80% or less of the length in the longitudinal direction of the absorber, the above (1) or The absorbent article described in (2) may be used.

In this absorbent article, the length of each heat-embossed portion in the longitudinal direction is 30% or more and 80% or less of the length of the absorber in the longitudinal direction. Therefore, diffusion of excretion in the width direction can be more reliably blocked by the heat-sealed portion and guided to the region between adjacent heat-sealed portions.

(4) In the absorbent article of the present invention, in the pair of heat embossed portions, the distance in the width direction between the central portions in the longitudinal direction is greater than the distance in the width direction between the ends in the longitudinal direction. The short absorbent article according to any one of (1) to (3) above may be used.

In this absorbent article, in a pair of hot-embossed parts, the distance between center parts in the longitudinal direction is shorter than the distance between end parts in the longitudinal direction. That is, the pair of heat embossed portions have a shape in which the central portion in the longitudinal direction is constricted inward. Therefore, in the central part in the longitudinal direction, the area of the area inside the pair of heat embossed parts can be made relatively narrow, and the area inside the pair of heat embossed parts can be relatively widened at the end in the longitudinal direction. can In other words, the absorbable amount of excrement at the central portion in the longitudinal direction of the absorber can be relatively reduced, and the absorbable amount at the end portion in the longitudinal direction can be relatively increased. Here, the central part in the longitudinal direction roughly corresponds to the excretory contact area. Therefore, it is possible to make it difficult for the excreted excretion to stay in the central portion and to spread easily toward the ends in the longitudinal direction.

The absorbent article of the present invention further includes (5) a pair of other heat embossed portions arranged at intervals in the longitudinal direction, each of the pair of other heat embossed portions extending along the width direction, and the thickness direction a plurality of other heat-sealed portions recessed from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber and intermittently located along the width direction, wherein the plurality of other heat-sealed portions, It does not contain pulp fibers, and the superabsorbent polymer is present at least in a region between other heat-sealed parts adjacent to each other in the width direction among the plurality of other heat-sealed parts, any one of (1) to (4) above. The absorbent article described in the above may be used.

In this absorbent article, a pair of other heat-embossed portions have a plurality of other heat-sealed portions intermittently positioned in the width direction, and the different heat-sealed portions do not contain pulp fibers.

Since the other heat-sealed portion is formed without the pulp fiber, which is an absorbent material that is difficult to heat-seal, the bonding strength of the other heat-sealed portion can be increased. That is, it can be made into a state in which peeling is difficult even if another heat fusion part (other heat embossed part) is not formed continuously along the width direction.

Further, in the longitudinal direction, for example, at the time of second absorption of excretion by the absorber, the excretion spreading in the longitudinal direction is blocked at the location of the other heat-sealed portion, and the excretion is transferred to the area between the adjacent other heat-sealed portions. can induce That is, excretion can be distributed to a region between adjacent heat-sealed portions where superabsorbent polymers exist. Then, the excretion that has passed through the area between the other adjacent heat-sealed parts can be guided to an absorber outside the longitudinal direction L of the pair of other heat-embossed parts. As a result, the excretion can be absorbed by the outer absorber.

At that time, as the excretion flows through the area between the other adjacent heat-sealed parts, the superabsorbent polymer present in the area between the other adjacent heat-sealed parts absorbs the excretion and gradually swells, and eventually the other adjacent heat-sealed parts The area between them is closed so that excretion becomes difficult to flow.

Therefore, in subsequent absorption of excretion by the absorber, for example, at the time of absorption of excretion for the third time, the excretion is blocked by the superabsorbent polymer present in the region between the plurality of other heat-sealed parts and other adjacent heat-sealed parts. This makes it impossible to spread outward in the longitudinal direction than the other pair of thermal embossed parts. As a result, excretion can be diffused in both ends in the width direction in the front and rear directions in the longitudinal direction where there is room for absorption. In addition, excretion can be prevented from being excessively diffused outward in the longitudinal direction than the pair of other heat embossed portions and leaking outward in the longitudinal direction. Therefore, excretion can be absorbed throughout the width direction and the length direction.

In the absorbent article of the present invention, (6) the length in the width direction in each of the pair of other heat embossed portions is 10% or more and 70% or less of the length in the width direction of the absorber (5) The absorbent article described above may be used.

In this absorbent article, the length in the width direction of each different heat-embossed portion is 10% or more and 70% or less of the length in the width direction of the absorber. Therefore, diffusion of the excretion in the longitudinal direction can be more reliably blocked by the other heat-sealed portion and guided to the region between the adjacent other heat-sealed portions.

In the absorbent article of the present invention, (7) in the pair of other heat-embossed portions, the distance in the longitudinal direction between the central portions in the width direction is the distance in the longitudinal direction between the ends in the width direction. The absorbent article described in (5) or (6) may be longer than the distance.

In this absorbent article, in a pair of heat-embossed parts, the distance between center parts in the width direction is longer than the distance between end parts in the width direction. That is, a pair of other heat embossing parts have a shape in which the central part in the width direction bulges outward. Therefore, in the central part in the width direction, the area inside the pair of other heat embossing parts can be widened. In other words, the amount of excretion that can be absorbed at the central portion in the width direction of the absorber can be increased. Accordingly, the excreted excretion can be more easily diffused to the end in the longitudinal direction.

In the absorbent article of the present invention, (8) in the absorber, the basis weight of the superabsorbent polymer present in the region between adjacent heat-sealed portions is higher than the basis weight of the superabsorbent polymer present in other regions, The absorbent article according to any one of (1) to (7) above may be used.

In this absorbent article, the basis weight of the superabsorbent polymer present in the region between the heat-sealed portions of the absorber is higher than the basis weight of the superabsorbent polymer present in other regions. Therefore, when blocking excretion with the swollen superabsorbent polymer, excretion can be blocked more reliably. In addition, when the superabsorbent polymer blocks excrement and spreads it in the longitudinal direction (width direction), further absorbing excrement and swelling, the heat-sealed portion cannot withstand the swelling force, and eventually the heat-sealed portion is peeled off. Therefore, excretion can be diffused again in the width direction (longitudinal direction) through the heat-sealed portion. As a result, even in the area of the absorbent that has not absorbed excretion due to the blocking of the superabsorbent polymer, the blocking is weakened and excretion can flow in, and excretion can be absorbed in the absorbent area.

In the absorbent article of the present invention, (9) the shape of the heat-sealed portion in plan view is a rectangle;

The rectangle is positioned such that a first side of the rectangle is along the longitudinal direction and a second side adjacent to the first side is along the width direction, and the ratio between the first side and the second side is 1:0.7. The absorbent article according to any one of (1) to (8) above, which is 1:1.3, may be used.

In this absorbent article, the thermally fused portion has a rectangular shape with an aspect ratio of 1:0.7 to 1:1.3 in plan view. Therefore, the excretion spreading outward in the width direction can be intercepted more accurately on the surface forming the first side, that is, the surface substantially perpendicular to the width direction. In addition, the superabsorbent polymer that absorbs excretion and swells can be sandwiched from both sides with the surface forming the second side, that is, the surface substantially along the width direction, so that it is not moved by excretion.

The absorbent article of the present invention may be the absorbent article according to any one of (1) to (9) above, wherein (10) the area of the heat-sealed portion in plan view is 0.5 mm 2 or more and 5 mm 2 or less. .

In this absorbent article, the thermally fused portion has an area of 0.5 mm 2 or more and 5 mm 2 or less in plan view. Therefore, the heat-sealed portion can accurately block excretion spreading outward in the width direction, and can keep the superabsorbent polymer swollen by absorbing excretion so as not to move due to excretion.

(11) The absorbent article of the present invention may be the absorbent article according to any one of (1) to (10), wherein the adhesive strength of the heat-sealed portion is 0.05 N/25 mm or more and 1 N/25 mm or less. .

In this absorbent article, the adhesive strength of the heat-sealed portion is 0.05 N/25 mm or more and 1 N/25 mm or less. Therefore, in the initial swelling of the super-absorbent polymer, the heat-sealed portion does not peel off, and the swollen super-absorbent polymer can block excretion from spreading in the width direction between adjacent heat-sealed portions. Thereby, excretion can be spread in the longitudinal direction. In addition, when swelling of the superabsorbent polymer progresses to a certain extent, it cannot withstand the swelling force, and eventually the heat-sealed portion is peeled off. Thereby, excretion can be diffused in the width direction again through the heat-sealed portion. As a result, even in the area of the absorbent that has not absorbed excretion due to the blocking of the superabsorbent polymer, the blocking is weakened and excretion can flow in, and excretion can be absorbed in the absorbent area.

In the absorbent article of the present invention, (12) the surface facing inward in the width direction in the heat-sealed portion is a flat surface along the longitudinal direction or a curved surface concave inward in the width direction. The absorbent article according to any one of (11) may be used.

In this absorbent article, the surface facing inward in the width direction (a surface substantially perpendicular to the width direction W) in the heat-sealed portion is a plane along the longitudinal direction, that is, a plane facing the center of the absorbent article, or a width It is a curved surface concave inward in the direction, that is, a curved surface concave with respect to the center side of the absorbent article. Thereby, it is possible to more reliably block the excretion that is about to diffuse outward in the width direction.

The absorbent article of the present invention may be the absorbent article according to any one of (1) to (12) above, wherein (13) the surface facing the longitudinal direction in the heat-sealed portion is a plane along the width direction. good night.

In this absorbent article, the surface facing the longitudinal direction in the heat-sealed portion (the surface substantially perpendicular to the longitudinal direction L), that is, the mutually opposing surfaces in the adjacent heat-sealed portion is a plane along the width direction. . Therefore, it is possible to more reliably hold the superabsorbent polymer that absorbs excretion and swells with the surfaces facing each other.

ADVANTAGE OF THE INVENTION According to this invention, in the absorbent article which has a pair of thermally embossed part, the absorbent article which can use an absorber efficiently as a whole can be provided.

1 is a plan view showing the configuration of an absorbent article according to an embodiment.
FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 .
Figure 3 is a schematic diagram explaining the action of the light incontinence pad.
4 is a plan view showing the structure of an absorber.

Hereinafter, the light incontinence pad 1 will be described as an example of the absorbent article according to the embodiment. In this case, the excreta to be absorbed by the light incontinence pad 1 is urine. However, the type and use of the absorbent article are not limited to these examples, and other absorbent articles may be used as long as they do not deviate from the scope of the spirit of the present invention. Examples of such absorbent articles include pantiliners, sanitary napkins, and disposable diapers.

1 and 2 are views showing the configuration of the light incontinence pad 1 according to the embodiment. However, FIG. 1 shows a plan view of the light incontinence pad 1 in a deployed state, and FIG. 2 shows a cross-sectional view taken along line II-II of FIG. 1 . The light incontinence pad 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other, and a longitudinal direction passing through the center of the width direction W and extending in the longitudinal direction L. It has a center line CL and a width direction center line CW passing through the center of the length direction L and extending in the width direction W. Directions approaching and moving away from the longitudinal centerline CL are respectively referred to as inner and outer directions in the width direction W. The directions approaching and moving away from the width direction centerline CW are respectively referred to as inner and outer directions in the longitudinal direction L. "Planar view" means that the light incontinence pad 1 in a state of being developed in a plane including the longitudinal direction L and the width direction W is viewed from the upper side in the thickness direction T, and "planar shape" means It refers to the shape that can be grasped in plan view. "Skin side" and "non-skin side" mean the side that is relatively close to and away from the wearer's skin surface in the thickness direction T when the light incontinence pad 1 is worn on the wearer, respectively. The "in-plane direction" is an arbitrary direction parallel to the plane including the width direction (W) and the longitudinal direction (L). These definitions are commonly used not only for the light incontinence pad 1 but also for each material of the light incontinence pad 1.

As shown in FIG. 1, the light incontinence pad 1 has a longitudinal direction in a rectangle having a long side extending in the longitudinal direction L and a short side extending in the width direction W in plan view. Both ends of L) have an arc-shaped bulging shape. However, in the present embodiment, the shape of the light incontinence pad 1 is not limited to this shape, and is any length as long as the length in the longitudinal direction L is longer than the width in the width direction W. It can be made into a long shape (e.g. rectangular, oval, gourd, hourglass).

As shown in FIG. 2, the light incontinence pad 1 comprises a topsheet 2, a backsheet 3, and the non-skin side of the topsheet 2, that is, the topsheet 2 and the backsheet ( 3) It is provided with the absorber 4 located in between. The light incontinence pad 1 further has a pair of heat embossed portions 5, 5 arranged at intervals in the width direction W. Each heat embossed portion 5 extends along the longitudinal direction L and is recessed in the thickness direction T from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorber 4. has a configuration. The heat embossed portion 5 is formed by heat-sealing the topsheet 2 and the absorber 4 while pressing them from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorber 4. (heat embossing). In this embodiment, as shown in Fig. 1, the light incontinence pad 1 further has a pair of other heat embossed portions 6, 6. The different heat embossed portions 6 extend along the width direction W and are recessed in the thickness direction T from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorber 4. It has a built-in configuration. Similarly to the heat embossing section 5, the other hot embossing section 6 also separates the topsheet 2 and the absorber 4 from the surface of the topsheet 2 on the skin side to the non-skin side of the absorber 4. It is formed by heat-sealing while pressing toward the surface (heat embossing).

However, which direction D is the direction along the longitudinal direction L is not limited to the case where the direction D is parallel to the longitudinal direction L, but also the component Dx of the longitudinal direction L of the direction D. ) is larger than the component Dy in the width direction W in the direction D (Dx>Dy) is also included. Similarly, when a direction D is a direction along the width direction W, not only when the direction D is parallel to the width direction W, but also when the component Dy of the width direction W of the direction D ) is larger than the component Dx in the longitudinal direction L in the direction D (Dy>Dx) is also included. On the other hand, for a curve, a certain direction (D) is evaluated as described above with respect to the tangent line of each point on the curve.

In the light incontinence pad 1, in the area where the surface sheet 2 and the absorbent body 4 overlap in the thickness direction T, there is an area that contacts the excretory port of the wearer when worn, that is, an excretory contact area XA. do. In this embodiment, the excretion port contact area XA is formed by a pair of heat embossed portions 5 and 5 and a pair of other heat embossed around the intersection of the longitudinal center line CL and the width direction center line CW. This is the region inside the parts 6, 6. Excretion is mainly excreted in the excretory contact area XA, absorbed, and then diffuses around it. The excretory contact area XA is specifically, for example, approximately the central portion of the absorber 4 in the longitudinal direction L and approximately the central portion of the absorber 4 in the width direction W, about 1/4 of the total length of the absorber 4. It is a region with a length of about 1/2 and a width of about 1/2 to 1/3 of the entire width of the absorber 4. However, the excretory contact area XA can vary appropriately depending on the type of absorbent article, or the gender or age group of the wearer of the absorbent article.

The topsheet 2 has the same planar shape as that of the light incontinence pad 1 and is positioned on the skin side of the light incontinence pad 1 . The topsheet 2 is a sheet having liquid permeability. The topsheet 2 is not particularly limited as long as it is formed of heat-fusible fibers or a heat-fusible material and has liquid permeability from the viewpoint of thermal fusion in thermal embossing. Examples of the topsheet 2 include a liquid-permeable nonwoven fabric or woven fabric made of heat-sealable fibers, a synthetic resin film having liquid-permeable holes formed of a heat-sealable material, and a composite sheet thereof. In this embodiment, an air-through nonwoven fabric formed of heat-sealable fibers and having liquid permeability is used. The basis weight of the topsheet 2 is, for example, 5 g/m 2 to 100 g/m 2 , preferably 20 g/m 2 to 50 g/m 2 . The thickness of the topsheet 2 is, for example, 0.2 to 3 mm.

The backsheet 3 has the same planar shape as that of the light incontinence pad 1 and is located on the non-skin side of the light incontinence pad 1 . The back sheet 3 is a sheet having liquid impermeability. The back sheet 3 is not particularly limited as long as it is a sheet having liquid impermeability, and examples thereof include liquid impervious nonwoven fabric, synthetic resin film, composite sheet of nonwoven fabric and synthetic resin film, and SMS nonwoven fabric. In this embodiment, an SMS nonwoven fabric having liquid impermeability is used.

The absorber 4 has a planar shape similar to that of the light incontinence pad 1, and is nested between the topsheet 2 and the backsheet 3. The non-skin side surface of the topsheet 2 and the skin side surface of the absorber 4 are bonded to each other, and the non-skin side surface of the absorber 4 and the skin side surface of the backsheet 3 are bonded to each other. do. The peripheral portion of the non-skin side surface of the topsheet 2 and the peripheral portion of the skin side surface of the backsheet 3 are bonded to each other. The absorber 4 is a layer having liquid absorbing performance and liquid retaining performance, and contains a superabsorbent polymer and heat-sealable fibers. As for the thickness of the absorber 4, 1 mm - 5 mm are mentioned, for example. In this embodiment, the absorber 4 includes an absorbent material 4a and a liquid-permeable sheet 4b enclosing the absorbent material 4a. The superabsorbent polymer 40 is preferably fixed to the liquid-permeable sheet 4b with a hot-melt adhesive or the like (not shown), but it may exist without being fixed and contained in the liquid-permeable sheet 4b.

The absorbent material 4a has a superabsorbent polymer 40. The superabsorbent polymer 40 is not particularly limited as long as it is a polymer capable of absorbing and retaining moisture, and examples thereof include starch-based, acrylic acid-based, and amino acid-based granular or fibrous superabsorbent polymers (SAP). The basis weight of the superabsorbent polymer 40 may be appropriately adjusted according to the absorption performance required for the light incontinence pad 1, but is, for example, 10 to 500 g/m2, preferably 100 to 400 g/m2. . The absorbent material 4a may further have absorbent fibers such as pulp fibers or hydrophilic heat-sealable fibers. The content of the absorbent fibers is, for example, in the range of 0 to 50% of the mass of the superabsorbent polymer 40. However, from the viewpoint of thermal fusion in thermal embossing, the absorbent material 4a is configured so that the region of the thermal fusion portion (described later) of the thermal embossing portion does not contain pulp fibers. In this embodiment, the absorbent material 4a is composed only of the superabsorbent polymer 40 and does not contain absorbent fibers. In another embodiment, the absorbent material 4a includes pulp fibers and/or hydrophilic heat-sealable fibers in addition to the super-absorbent polymer 40, but the heat-sealed portion of the heat embossed portion 5 (described later) is pulp. It is structured not to contain fibers.

The liquid-permeable sheet 4b is not particularly limited as long as it is formed of heat-sealable fibers, does not contain pulp fibers, and has liquid-permeability from the viewpoint of heat-sealing in thermal embossing. Examples of the liquid-permeable sheet 4b include a liquid-permeable nonwoven fabric made of heat-sealable fibers, a laminated nonwoven fabric, and a hydrophilic nonwoven fabric such as a tissue. The basis weight of the liquid-permeable sheet 4b is, for example, 2 g/m 2 to 80 g/m 2 , preferably 10 g/m 2 to 40 g/m 2 . In this embodiment, an air-through nonwoven fabric made of heat-sealable fibers and containing no pulp fibers and having liquid permeability is used. On the other hand, the liquid-permeable sheet 4b may have a structure in which a plurality of sheets containing heat-fusible fibers and not containing pulp fibers are laminated.

On the other hand, between the topsheet 2 and the absorber 4, one sheet or a plurality of other liquid-permeable sheets may be provided. For example, a known sheet that imparts liquid diffusing properties and cushioning properties to the light incontinence pad 1 can be used. The liquid-permeable sheet is not particularly limited as long as it is formed of heat-sealable fibers from the viewpoint of heat-sealing in heat embossing and does not contain pulp fibers. In addition, a tissue may be provided between the backsheet 3 and the absorbent body 4 in order to supplement the absorbent performance.

The heat-fusible fiber is not particularly limited as long as it is a fiber that can be melted by heating by heat embossing and heat-sealed. Examples of such thermally fusible fibers include single fibers of polyolefins such as polyethylene, polypropylene, and polyvinyl alcohol, polyethylene terephthalate (core portion)/polyethylene (sheath portion), and polyethylene terephthalate (core portion)/polypropylene (sheath portion). part), core-sheath type composite fibers such as polypropylene (core part)/polyethylene (sheath part), and the like. When used as the topsheet 2, absorbent material 4a, liquid-permeable sheet 4b or the like, hydrophilic treatment may be performed with a hydrophilic oil agent or the like. Examples of the heat-sealable material include synthetic resins such as thermoplastic resins.

In this embodiment, the shape (or pattern) of the pair of heat embossing portions 5 and 5 is a gentle arc shape (gentle arc shape) convex with respect to the longitudinal center line CL in plan view. has In other words, the shape is such that the distance between the pair of heat embossed portions 5 and 5 is small (narrow) in the vicinity of the center in the longitudinal direction L and increases toward both outer sides in the longitudinal direction L. It is a (widening) shape. The shape is line symmetrical with respect to the center line in the longitudinal direction CL and also line symmetric with respect to the center line CW in the width direction. A pair of heat embossing parts 5 and 5 extend to the vicinity of both ends of the absorber 4 in the longitudinal direction L, and extend to the vicinity of both ends of the absorber in the width direction W. The width of the heat embossed portion 5 is preferably 0.5 to 4 mm, and more preferably 1 to 2 mm. However, the shape of a pair of heat embossing parts 5 and 5 is not limited to this example, You may have another shape. Examples of other shapes include a shape parallel to the longitudinal direction L and a shape concave with respect to the longitudinal center line CL.

Each of the pair of heat embossed portions 5 and 5 is provided with a plurality of heat-sealed portions 5t and a plurality of non-heat-sealed portions 5s. Each of the plurality of thermally fused portions 5t is disposed intermittently along the longitudinal direction L in the thermally embossed portion 5 . Each of the plurality of non-thermal fusion portions 5s is disposed between adjacent thermally fused portions 5t and 5t in the thermal embossing portion 5 . In other words, in the heat embossed portion 5, along the longitudinal direction L, the heat-sealed portion 5t and the non-heat-sealed portion 5s are alternately arranged. In this embodiment, in plan view, the thermally fused portions 5t and the non-thermally fused portions 5s are alternately arranged in a gentle arc shape (in a gentle arc shape) so as to be convex with respect to the longitudinal center line CL. has been

In the heat-sealed portion 5t, the surface sheet 2 and the liquid-pervious sheet 4b on the skin side of the absorber 4 are depressed toward the non-skin side in the thickness direction T, and It has a configuration heat-sealed together with the liquid-permeable sheet 4b on the non-skin side. In this embodiment, the heat-sealed portion 5t includes a bottom portion 5tB in which the topsheet 2 and the liquid-permeable sheet 4b are thermally fused to each other in the thickness direction T, and the bottom portion 5tB is formed by thickness. It is formed to be erected and enclosed in a cylindrical shape in the direction T, and includes a side wall portion 5tW formed by overlapping the topsheet 2 and the liquid-permeable sheet 4b. The bottom portion 5tB of the heat-sealed portion 5t has a high-density portion having a higher material density than the surrounding area due to compression and melting. The side wall portion 5tW of the heat-sealed portion 5t has a shape that gradually widens from the bottom portion 5tB toward the skin side. The non-heat-sealed portion 5s varies depending on the distance between the adjacent heat-sealed portions 5t and 5t, but the topsheet 2 and the absorber 4 ) has a slightly recessed configuration in the thickness direction (T). However, the non-thermal fusion portion 5s may not be recessed.

The heat-sealed portion 5t is formed by heat-sealing the surface sheet 2 and the liquid-permeable sheet 4b of the absorber 4 by pressing them in the thickness direction T. Therefore, the heat-sealed portion 5t does not contain pulp fibers. Further, the heat-sealed portion 5t may contain the absorbent material 4a, but the area of the heat-sealed portion in the absorbent material 4a is configured so as not to contain pulp fibers. Therefore, even in that case, the heat-sealed portion 5t does not contain pulp fibers. On the other hand, the heat-sealed portion 5t may contain a superabsorbent polymer as the absorbent material 4a. Since the superabsorbent polymer can form part of the heat-sealed portion by melting with heat during thermal embossing, the adhesive strength of the heat-sealed portion is not reduced.

On the other hand, the non-thermal fusion portion 5s is formed by laminating the topsheet 2, the liquid-permeable sheet 4b of the absorber 4, and the absorbent material 4a in the thickness direction T. Accordingly, the non-heat-sealed portion 5s does not contain pulp fibers when the absorbent material 4a contains only the superabsorbent polymer 40 and does not contain pulp fibers. On the other hand, the non-heat-sealed portion 5s may include pulp fibers when the absorbent material 4a includes the superabsorbent polymer 40 and pulp fibers, for example. In this embodiment, from the viewpoint of thermal fusion in thermal embossing, since the absorbent material 4a is only the superabsorbent polymer 40, the non-thermal welded portion 5s does not contain pulp fibers as the absorbent material 4a. It contains a superabsorbent polymer. Further, in the present embodiment, in the absorber 4, the basis weight of the superabsorbent polymer present in the non-thermal fusion zone 5s is higher than that of the superabsorbent polymer present in regions other than the non-thermal fusion zone 5s.

In this embodiment, the shape (or pattern) of the pair of other heat embossing parts 6 and 6 is a gentle arc shape (gentle arc shape) concave with respect to the width direction center line CW in plan view. has a shape In other words, the shape is such that the distance between the pair of different heat embossing portions 6, 6 is large (wide) in the vicinity of the center in the width direction W, and toward both outer sides in the width direction W. It is a shape that becomes smaller (narrower). The shape is arranged line-symmetrically with respect to the centerline in the width direction CW and also line-symmetrically with respect to the centerline in the longitudinal direction CL. The pair of other heat embossed portions 6 and 6 extend to the vicinity of both ends of the absorber 4 in the width direction W and extend to the vicinity of both ends of the absorber 4 in the longitudinal direction L. . The width of the other heat embossing portion 6 is preferably 0.5 to 4 mm, and more preferably 1 to 2 mm. However, the shape of a pair of different heat embossing parts 6 and 6 is not limited to this example, You may have another shape. As another shape of a pair of different heat embossing parts 6 and 6, a shape parallel to the width direction W and a shape convex with respect to the width direction centerline CW are mentioned, for example. Moreover, you may have a pair of other heat embossing part further inside the longitudinal direction L of the pair of other heat embossing part 6,6.

Each of the pair of other heat embossing portions 6, 6 is provided with a plurality of other heat fusion portions 6t and a plurality of other non-heat fusion portions 6s. Each of the plurality of other thermally fused portions 6t is intermittently arranged along the width direction W in the other thermally embossed portion 6 . Each of the plurality of other non-thermal fusion portions 6s is arranged between adjacent other thermally fused portions 6t and 6t in the other thermal embossing portion 6 . In other words, in the other heat-embossed portion 6, along the width direction W, other heat-sealed portions 6t and other non-heat-sealed portions 6s are alternately arranged. In this embodiment, in plan view, the other thermally fused portions 6t and the other non-thermally fused portions 6s are alternately formed in a gentle arc shape (in a gentle arc shape) so as to be concave with respect to the center line in the width direction CW. ) are placed.

Other configurations of the other thermally fused portion 6t and the other non-thermally fused portion 6s, for example, specific shapes, structures, and materials, are the same as those of the thermally fused portion 5t and the non-thermally fused portion 5s, respectively. do. Therefore, the description thereof is omitted.

As shown in FIG. 2 , in this embodiment, the light incontinence pad 1 further includes a pair of side gather sheets 7 and 7 , linear elastic members 8 and 8 , and a fixing part 9 ) is provided. The pair of side gather sheets 7 and 7 are leak prevention walls arranged so as to cover the surfaces of the top sheet 2 on both sides in the width direction W and extending in the longitudinal direction L. The pair of side gather sheets 7 and 7 are folded so as to be able to stand upright on both surfaces of the top sheet 2 in the width direction W, and the inner edge in the width direction W forms the gather portion. It is free end to form. The linear elastic members 8 and 8 are linear elastic bodies extending along the longitudinal direction L at the outer ends of the pair of side gather sheets 7 and 7 in the width direction W. The linear elastic members 8, 8 are disposed, for example, two by one on each of the pair of side gather sheets 7, 7, for example, on the outer side of the pair of side gather sheets 7, 7 in the width direction W. contract the end of The fixing part 9 is an elongated rectangular adhesive tape attached to the non-skin side of the backsheet 3 along the longitudinal direction L. In this embodiment, three fixing parts 9 lined up at intervals in the width direction W are formed. When the light incontinence pad 1 is individually wrapped, the fixing part 9 fixes the light incontinence pad 1 to a packaging sheet (not shown) through a separator (not shown), and the light incontinence pad 1 In case of use, the light incontinence pad 1 is re-fixed to the wearer's underwear.

Next, an example of a method for manufacturing the light incontinence pad 1 according to the present embodiment will be described.

First, the absorber 4 is manufactured, for example, by the following method. First, the absorbent material 4a (super absorbent polymer) described above is disposed in the central region in the width direction W of the liquid-permeable sheet 4b to which the adhesive is applied. Next, regions adjacent to both sides in the width direction W of the region where the absorbent material 4a is disposed are folded inward in the width direction W along a folding line extending in the longitudinal direction L. Here, an adhesive is previously applied to both ends in the width direction W of the overlapping liquid-pervious sheets 4b. Then, the both ends are pressed, and both ends are bonded to each other. On the other hand, an adhesive is previously applied to both ends in the longitudinal direction L of the region where the absorbent material 4a is disposed. Then, the both ends are pressed, and both ends are bonded to each other. As a result of the above, the absorber 4 in which the absorbent material 4a is captured by the liquid-permeable sheet 4b is formed. On the other hand, for example, in the heat embossed portion of the light incontinence pad 1 of the finished product, when it is desired to relatively increase the basis weight of the absorbent material 4a (superabsorbent polymer), the heat embossing in the liquid permeable sheet 4b A method of relatively increasing the basis weight of the adhesive in the region where the boss portion is formed may be taken. In that case, you may arrange|position the adhesive agent in substantially the same shape as the shape of a planar view of a heat embossing part, for example, and you may arrange|position it in the rectangular shape or belt shape containing a heat embossing part.

Subsequently, the topsheet in the form of a continuous sheet is supplied to the transport belt. A hot melt adhesive is applied to one surface of the topsheet. The absorber 4 is pressed against one surface of the topsheet with a roll. As a result, a laminated body in which the absorber 4 and the topsheet are laminated is formed. Subsequently, the layered product is embossed while being heated with a pair of rolls of a crimping device (heat embossing). Thereby, in the laminate, a pair of heat embossed portions 5, 5 including a plurality of heat-sealed portions 5t described by FIGS. 1 and 2 and a plurality of other heat-sealed portions 6t are included. A pair of other heat embossed portions 6 and 6 are formed. Subsequently, the backsheet in the form of a continuous sheet is supplied to the transport belt. A hot melt adhesive is applied to one side of the back sheet. One side of the backsheet is pressed with a roll to the heat-embossed laminate. As a result, a laminate is formed in which the top sheet, the absorber 4 and the back sheet are laminated. Then, the laminated body is cut at the peripheral portion by the peripheral cutting device, and separated into the shape of the light incontinence pad 1. Thereby, the light incontinence pad 1 (Fig. 1) is manufactured.

However, the above manufacturing method is an example, and it is also possible to use other well-known methods.

Next, the action of the light incontinence pad 1 according to the present embodiment will be described. 3 is a schematic diagram explaining the action of the light incontinence pad 1. Fig. 3(a) shows the state in the heat embossing section 5 at the initial stage of absorption of excretion by the absorber 4, for example, at the time of absorption of excretion for the first time. FIG. 3(b) shows the state in the heat embossing part 5 at the time of absorption of excretion by the absorber 4 later than the case of FIG. 3(a), for example, absorption of excretion for the second time. FIG. 3(c) shows the state in the heat embossing part 5 at the time of absorption of excretion by the absorber 4 later than in the case of FIG. 3(b), for example, the third time of absorption of excrement. On the other hand, the number of excretion of excrement (1st, 2nd, 3rd time) is an example, and depending on the amount of excretion at one time of excretion, the number of times of being in the state of FIGS. 3 (a) to 3 (c) may vary. can

In the light incontinence pad 1, a pair of heat embossed portions 5, 5 has a plurality of thermally fused portions 5t intermittently positioned in the longitudinal direction L, and each thermally fused portion 5t is It does not contain pulp fibers. In this way, the heat-sealable portion 5t is formed without pulp fibers, which are absorbent materials that are difficult to heat-seal, that is, made of heat-sealable fibers that are easily heat-sealed. ) is formed. Therefore, the bonding strength by the heat-sealed portion 5t can be increased, and the heat-sealed portion 5t can be made in a state in which peeling is difficult. Therefore, it is not necessary to continuously form the heat-sealed portion in a groove shape along the longitudinal direction (L), and excretion can be widely diffused through the area between the plurality of heat-sealed portions 5t intermittently formed. In addition, it is not necessary to widely dispose the heat-sealed part on the light incontinence pad in order to increase the adhesive strength.

Excretion (eg urine) is excreted in the vicinity of the center of the light incontinence pad 1 (excretory contact area XA), and travels through the absorber 4 at approximately the same speed in the width direction W and the longitudinal direction L. is thought to spread to Therefore, excretion first reaches the pair of thermal embossing portions 5 and 5 in the width direction W. In that case, as shown in FIG. 3(a), in the width direction W, in the initial stage of absorption of excretion by the absorber 4, for example, at the time of the first absorption of excretion F10, in the width direction ( W) can be blocked by the excretion (F10) to be diffused, the thermally fused portion (5t). Then, the blocked excretion (F10), the super absorbent polymer 40 is present, the area between the adjacent heat fusion portion (5t, 5t), that is, it can be guided to the non-thermal fusion portion (5s). Thereby, excretion F10 can be passed through the non-thermal fusion part 5s. Then, the excretion F10 that has flowed through the non-thermal fusion portion 5s, that is, the excretion F11, is guided to the outer absorber 4 in the width direction W than the pair of thermal embossing portions 5 and 5. can Thereby, the excretion F11 can be absorbed by the absorber 4 on the outer side.

As the excretion F11 flows through the region between the adjacent heat-sealed portions 5t and 5t, that is, the non-heat-sealed portion 5s, in which the superabsorbent polymer 40 exists, The superabsorbent polymer 40 absorbs the excretion F11 and gradually swells. As a result, the super absorbent polymer 40 eventually becomes the swollen super absorbent polymer 40, and the super absorbent polymer 40 closes the non-heat-sealed portion 5s so that excretion becomes difficult to flow. Therefore, as shown in FIG. 3(b), at the time of absorption of excretion by the absorber 4 later than in the case of FIG. , It is blocked by the superabsorbent polymer 40 present in the region between the plurality of thermally fused portions 5t and the adjacent thermally fused portions 5t and 5t, that is, in the non-thermally fused portion 5s. As a result, it becomes impossible to spread excretion F20 to the outside of the width direction W rather than a pair of heat embossing part 5,5. As a result, the excretion F20 can be diffused forward and backward in the longitudinal direction L where there is room for absorption (excretion F21). Moreover, excretion F20 spreads too much to the outside of the width direction W rather than a pair of heat embossing parts 5 and 5, and can prevent that it leaks to the outside of the width direction W.

In this way, in the absorber, the excretion is initially guided mainly to the area in the width direction (W), and then mainly to the area in the longitudinal direction (L), that is, in the width direction (W) and the longitudinal direction ( L) can be induced and absorbed in a wide range. This makes it possible to efficiently use the absorber 4 as a whole. As a result, even when the amount of excretion is large, such as multiple times of excretion, leakage of excretion without being absorbed can be prevented.

On the other hand, if the swelling of the super absorbent polymer 40 further proceeds (the super absorbent polymer 40), it cannot withstand the swelling force, and eventually the heat-sealed portion 5t may peel off (the heat-sealed portion (5ta)). For example, it may happen that the topsheet 2 peels off from the absorber 4 or the bottom 5tB of the heat-sealed portion 5t peels off from the liquid-pervious sheet 4b on the non-skin side. In such a state, as shown in FIG. 3(c), absorption of excretion F30 by the absorber 4 later than in the case of FIG. 3(b), for example, at the time of the third absorption of excretion F30 , Excretion (F30) is blocked by the superabsorbent polymer 40 present in the non-thermal fusion portion (5s). And the blocked excretion (F30), can be guided to the peeled portion of the thermally fused portion (5ta). Thereby, excretion F30 can be passed through the peeled portion of the heat-sealed portion 5ta. Then, excretion F30, that is, excretion F31, which has passed through the peeled portion of the heat-sealed portion 5ta, is returned to the absorber outside the pair of heat-embossed portions 5, 5 in the width direction W. (4) can be diffused. As a result, even in the area of the absorber 4 where excretion has not been absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened and excretion can flow in, and excretion can be absorbed in the area of the absorber. . In the area of the absorber 4 in which excretion is not absorbed by blocking with the super-absorbent polymer 40, the blocking of the super-absorbent polymer 40 is too fast and the excretion is not sufficiently absorbed, so there is room for heat embossing. A region outside the portion 5 in the width direction W is exemplified. Therefore, excretion can be guided and absorbed over a wider range in the width direction W and the longitudinal direction L. Therefore, it becomes possible to use the absorber 4 more efficiently as a whole.

As a preferable aspect in this embodiment, a pair of other heat embossing parts 6 and 6 lined up at intervals in the longitudinal direction L are further provided. In addition, the pair of other heat embossed parts 6 and 6 have a plurality of other heat-sealed parts 6t and 6t intermittently located in the width direction W, and each different heat-sealed part 6t is a pulp fiber. does not contain In this way, the other heat-sealable portion 6t is formed without pulp fibers, which are absorbent materials that are difficult to heat-seal, that is, made of heat-sealable fibers that are easily heat-sealed. 4b) is formed. Therefore, the adhesive strength by the other heat fusion part 6t can be strengthened, and the other heat fusion part 6t can be made into the state which is hard to peel. Accordingly, it is not necessary to continuously form the other heat-sealed parts in a groove shape along the width direction (W), and excretion can be widely diffused through the area between the plurality of other heat-sealed parts intermittently formed. In addition, it is not necessary to widely dispose other heat-sealed parts on the light incontinence pad in order to increase the adhesive strength.

Further, in the longitudinal direction L, for example, at the time of absorption of excretion by the absorber for the second time, the excretion spreading in the longitudinal direction L is blocked by another heat-sealed portion 6t, and the excretion is transferred to an adjacent area. It can lead to the area between the other heat fusion portions 6t and 6t. That is, the excretion can be distributed in the region between the adjacent other thermally fused portions 6t and 6t where the superabsorbent polymer 40 exists. Then, it is possible to guide the excretion that has passed through the area between the adjacent other heat-sealed portions 6t and 6t to the absorber 4 outside the other pair of heat-embossed portions 6 and 6 in the longitudinal direction L. can Thereby, the excretion can be absorbed by the absorber 4 on the outer side.

At that time, as the excretion flows through the area between the adjacent other heat-sealed parts 6t and 6t, the superabsorbent polymer 40 present in the area between the adjacent other heat-sealed parts 6t and 6t absorbs the excretion. Then, it swells gradually and eventually closes the area between the adjacent other heat-sealed portions 6t and 6t so that excretion becomes difficult to flow. Therefore, in subsequent absorption of excretion by the absorber, for example, at the time of absorption of excretion for the third time, the excretion is disposed in the region between the plurality of other heat-sealed portions 6t and the adjacent other heat-sealed portions 6t and 6t. It is blocked by the existing superabsorbent polymer 40, so that it cannot diffuse outward in the longitudinal direction L more than the pair of other heat embossed portions 6 and 6. Thereby, excretion can be diffused in both ends of the width direction W in the front and back of the longitudinal direction L where there is room for absorption. In addition, excretion can be prevented from being excessively diffused outward in the longitudinal direction (L) than the pair of other heat embossing portions (6, 6) and leaking outward in the longitudinal direction (L). Therefore, excretion can be absorbed throughout the width direction (W) and the length direction (L).

As a preferable aspect in this embodiment, the distance between adjacent thermally fused portions 5t and 5t in the plurality of thermally fused portions 5t (distance P shown in Fig. 3(a)) is 0.5 mm or more and 5 mm or less are preferable, and 1 mm or more and 3 mm or less are more preferable. In addition, the basis weight of the superabsorbent polymer 40 between the adjacent heat-sealed portions 5t and 5t is preferably 20 g/m2 or more and 80 g/m2 or less, and 30 g/m2 or more and 50 g/m2 or less. more preferable Similarly, the distance between adjacent other heat-sealed parts 6t, 6t in the plurality of other heat-sealed parts 6t is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less. . The basis weight of the superabsorbent polymer 40 between adjacent heat-sealed portions 6t and 6t is preferably 20 g/m2 or more and 80 g/m2 or less, and more preferably 30 g/m2 or more and 50 g/m2 or less. desirable.

As a result, between the adjacent heat-sealed portions 5t and 5t (and the other heat-sealed portions 6t and 6t), the excretion is initially allowed to flow, and thereafter the swollen superabsorbent polymer 40 ) to block excretion. In the case of less than 0.5 mm or more than 80 g/m 2 , blocking between adjacent heat-sealed parts 5t and 5t (other heat-sealed parts 6t and 6t) due to the expansion of the superabsorbent polymer 40 This is too fast, and the excretion is excreted in the area outside the width direction W (longitudinal direction L) of the pair of heat embossing parts 5, 5 (the other pair of heat embossing parts 6, 6). There is a risk that it will be difficult to spread sufficiently. In the case of more than 5 mm or less than 20 g/m 2 , it is not possible to sufficiently block the adjacent heat-sealed portions 5t and 5t (and other heat-sealed portions 6t and 6t), and excretion is It diffuses too much outward in the width direction W (longitudinal direction L) of the pair of heat embossed portions 5 and 5 (the other pair of heat embossed portions 6 and 6), and the lengthwise direction L There is a fear that it will be difficult to diffuse in (, the width direction W), or there is a fear that it will leak outward in the width direction W (, the longitudinal direction L).

As a preferred aspect of the present embodiment, in the absorber 4, the basis weight of the superabsorbent polymer 40 present in the region between the adjacent heat-sealed portions 5t and 5t (non-heat-sealed portion 5s) is , is preferably higher than the basis weight of the superabsorbent polymer 40 present in other regions. Similarly, in the absorber 4, the basis weight of the superabsorbent polymer 40 present in the region between the adjacent other heat-sealed portions 6t and 6t (other non-heat-sealed portion 6s) is higher than that of the other regions. It is preferably higher than the basis weight of the superabsorbent polymer 40 present. However, comparison of basis weight shall be performed with the maximum value of basis weight of each region.

Therefore, when excretion is blocked with the swollen superabsorbent polymer 40, excretion can be blocked more reliably. In addition, when the superabsorbent polymer 40 blocks excretion and spreads it in the longitudinal direction L (, width direction W) and further absorbs excretion and swells, the heat-sealed portion 5t (, other heat The fused portion 6t cannot withstand the swelling force, and eventually the thermally fused portion 5t (other thermally fused portions 6t) is peeled off. Therefore, the excretion can be diffused again in the width direction W (longitudinal direction L) through the separated heat-sealed portion 5t (the other heat-sealed portion 6t). As a result, even in the area of the absorber 4 where excretion has not been absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened and excretion can flow in, and excretion is absorbed in the area of the absorbent 4. can make it

In another embodiment, as a region with a high basis weight of the superabsorbent polymer 40, from the simplicity of the manufacturing method, for example, a thin and long side including the heat embossing portion 5 and parallel to the longitudinal direction L (example : A rectangular area in which the heat embossed portion 5 is inscribed, or another heat embossed portion 6 is included, and the long side is thin and long parallel to the width direction W (Example: another heat embossed portion 6 is inscribed) a region pseudo-similar to a rectangle. Even in these cases, when excretion is blocked with the swollen superabsorbent polymer 40, excretion can be blocked more reliably.

In another embodiment, in the absorber 4, as described above, the basis weight of the superabsorbent polymer 40 present in the non-heat-sealed portion 5s is the basis weight of the superabsorbent polymer 40 present in other areas. In addition to being higher, it is also preferable to have the following configurations. In the absorber 4, the outer side of each of the pair of heat embossed portions 5 and 5 in the width direction W and the region between the adjacent heat-sealed portions 5t and 5t (non-heat-sealed portion 5s) ))), the basis weight of the superabsorbent polymer 40 present in the area adjacent to the outside in the width direction W is the area between the adjacent heat-sealed parts 5t and 5t (excluding the non-heat-sealed part 5s). , is more preferably higher than the basis weight of the superabsorbent polymer 40 present in other regions. And/or, in the absorber 4, the outer side of each of the pair of other heat embossed portions 6, 6 in the longitudinal direction L, and the region between the adjacent other heat fusion portions 6t, 6t The basis weight of the superabsorbent polymer 40 present in the area adjacent to the outside in the longitudinal direction L of (the other non-thermal fusion portion 6s) is the area between the adjacent other heat-sealable portions 6t and 6t (other It is more preferable to have a basis weight higher than the basis weight of the superabsorbent polymer 40 present in other areas except for the non-heat-sealed portion 6s). Here, the area adjacent to the outer side of the non-thermal fusion portion 5s in the width direction W is, for example, a region having a width approximately equal to that of the non-thermal fusion portion 5s in the width direction W. Similarly, the area adjacent to the outer side of the other non-heat-sealed portion 6s in the longitudinal direction L is, for example, a region having a width approximately equal to that of the other non-heat-sealed portion 6s in the longitudinal direction L. In these cases, excretion can be blocked more reliably by the superabsorbent polymer 40 swollen in each adjacent region.

As a preferable aspect in this embodiment, as shown in Fig. 3(a), the shape of the thermally fused portion 5t in plan view is preferably rectangular. The rectangle is positioned so that the first side Y1 of the rectangle is along the longitudinal direction L, and the second side X1 adjacent to the first side Y1 is along the width direction W. The ratio of the first side Y1 to the second side X1 is preferably from 1:0.7 to 1:1.3, and more preferably from 1:0.9 to 1:1.1. The same applies to the other thermally fused portions 6t as in the case of the thermally fused portions 5t.

Therefore, in the case of the heat-sealed portion 5t, excretion spreading outward in the width direction W is transferred to a plane forming the first side Y1, that is, a plane substantially perpendicular to the width direction W. You can block more accurately. In addition, the superabsorbent polymer that absorbs excrement and swells is interposed from both sides along the surface forming the second side (X1), that is, along the width direction (W), so as not to be moved by excrement. can keep When the first side is too short, it becomes difficult to accurately block excretion spreading outward in the width direction. If the second side is too short, it becomes difficult to maintain the superabsorbent polymer that swells by absorbing excretion. Also in the case of the other heat-sealed portion 6t, the heat-sealed portion 5t except that the functions of the first side Y1 in the width direction W and the second side X1 in the longitudinal direction L change. ) is the same as in the case of

As a preferable aspect in this embodiment, the area of the thermally fused portion 5t in plan view is preferably 0.5 mm 2 or more and 5 mm 2 or less, and more preferably 1 mm 2 or more and 4 mm 2 or less. The same applies to the other thermally fused portions 6t as in the case of the thermally fused portions 5t.

Therefore, the heat-sealed portion 5t (the other heat-sealed portion 6t) can accurately block the excretion spreading outward in the width direction W (and the longitudinal direction L), The super absorbent polymer 40 swollen by absorption can be maintained so as not to be moved by excretion. In the case of less than 0.5 mm 2 , there is a possibility that it may become difficult to intercept excretion accurately. In the case of more than 5 mm 2 , there is a concern that it becomes difficult to maintain the superabsorbent polymer.

As a preferred aspect of the present embodiment, the adhesive strength of the heat-sealed portion 5t is preferably 0.05 N or more and 1 N or less, and more preferably 0.08 N or more and 0.5 N or less. The case of the other thermally fused portion 6t is the same as that of the thermally fused portion 5t.

Therefore, in the initial swelling of the superabsorbent polymer 40, the heat-sealed portion 5t (other heat-sealed portion 6t) does not come off, and the adjacent heat-sealed portion 5t, 5t (other heat-sealed portion 6t) Between the fused portions 6t and 6t, the swollen superabsorbent polymer 40 can block excretion that is about to spread in the width direction W (longitudinal direction L). Thereby, excretion can be diffused in the longitudinal direction L (, width direction W). In addition, when the swelling of the superabsorbent polymer 40 progresses to a certain extent, it cannot withstand the swelling force, and eventually the heat-sealed portion 5t (or other heat-sealed portion 6t) is peeled off. Thereby, excretion can be diffused again in the width direction W (longitudinal direction L) through the thermally fused portion 5t (other thermally fused portion 6t). As a result, even in the area of the absorber 4 where excretion has not been absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened and excretion can flow in, and excretion is absorbed in the area of the absorbent 4. can make it If the adhesive strength is less than 0.05 N, there is a possibility that the heat-sealed portion 5t (other heat-sealed portion 6t) may be peeled off during attachment. When the adhesive strength exceeds 1 N, there is a risk that the heat-sealed portion 5t (or other heat-sealed portion 6t) may not be peeled off when the swelling of the superabsorbent polymer 40 progresses to a certain extent.

As a preferable aspect in this embodiment, the surface facing inward in the width direction W in the thermally fused portion 5t (a surface substantially perpendicular to the width direction W) is along the longitudinal direction L It is preferably a flat surface or a curved surface concave inward in the width direction W. Similarly, the surface facing the inside of the longitudinal direction L (a surface substantially perpendicular to the longitudinal direction L) of the other heat-sealed portion 6t is a plane along the width direction W or the longitudinal direction (L ) is preferably a curved surface concave inwardly.

The surface of the heat-sealed portion 5t facing inward in the width direction W (a surface substantially perpendicular to the width direction W) is a plane along the longitudinal direction L, that is, the surface of the light incontinence pad 1 It is a flat surface facing the central side or a curved surface concave inward in the width direction W, that is, a curved surface concave with respect to the central side of the light incontinence pad 1. Thereby, it is possible to more reliably block the excretion that is about to diffuse outward in the width direction W. Similarly, the surface facing the inside of the longitudinal direction L (a surface substantially perpendicular to the longitudinal direction L) of the other heat-sealed portion 6t is a plane along the width direction W, that is, a light incontinence pad ( It is a flat surface toward the center side of 1) or a curved surface concave inward in the longitudinal direction L, that is, a curved surface concave with respect to the center side of the light incontinence pad 1. Thereby, it is possible to more reliably block the excretion that is about to diffuse outward in the longitudinal direction L.

As a preferable aspect in this embodiment, the surface facing the longitudinal direction L in the thermally fused portion 5t (a surface substantially perpendicular to the longitudinal direction L) is a plane along the width direction W it is desirable Similarly, the surface facing the width direction W (a surface substantially perpendicular to the width direction W) of the other thermally fused portion 6t is preferably a plane along the longitudinal direction L.

That is, the surface of the thermally fused portion 5t facing the longitudinal direction L (a surface substantially perpendicular to the longitudinal direction L), that is, the surfaces of the adjacent thermally fused portions 5t and 5t facing each other. is a plane along the width direction W. Therefore, it is possible to more reliably hold the superabsorbent polymer 40 that absorbs excretion and swells with the surfaces facing each other. Similarly, the surface facing the width direction W in the other thermally fused portion 6t (a surface substantially perpendicular to the widthwise direction W), that is, the mutually opposed surfaces in the other adjacent thermally fused portions 6t and 6t The surface to do is a plane along the longitudinal direction L. Therefore, the surfaces facing each other can more reliably hold the superabsorbent polymer 40 that absorbs excretion and swells.

4 is a plan view showing the structure of the absorber 4.

As a preferable aspect in this embodiment, the length E1L in the longitudinal direction L in each of the pair of heat embossing portions 5 and 5 is the length in the longitudinal direction L of the absorber 4 With (AL) as 100%, 30% or more and 80% or less are preferable, and 40% or more and 70% or less are more preferable. Thereby, the spread of excretion in the width direction W can be more reliably blocked by the heat-sealed portion 5t and guided to the region between the adjacent heat-sealed portions 5t and 5t. In the case of less than 30%, even if the adjacent heat-sealed portions 5t and 5t are blocked by the expansion of the superabsorbent polymer 40, excretion is retained in the pair of heat-embossed portions 5, In places other than 5), there is a possibility that the diffusion outside in the width direction W becomes easy and the diffusion in the longitudinal direction L becomes difficult. In the case of more than 80%, the excretion spreads to the regions of both ends of the pair of heat embossed portions 5 and 5 in the absorber 4 outside the width direction W in the longitudinal direction L. There is a risk that it will become difficult.

As a preferred aspect in the present embodiment, in the pair of heat embossing portions 5 and 5, the distance E1Wa in the width direction W between the central portions in the longitudinal direction L is in the longitudinal direction ( It is preferable that it is shorter than the distance E1Wb of the width direction W in the edge part of L). That is, the pair of heat embossed portions 5 and 5 have a shape in which the central portion in the longitudinal direction L is constricted inward. Therefore, in the center part of the longitudinal direction L, the area of the area|region inside a pair of heat embossing part 5, 5 can be made relatively narrow, and in the end part of the longitudinal direction L, a pair The area of the inner region of the heat embossed portion (5, 5) of the can be relatively widened. In other words, it is possible to relatively reduce the amount of absorbable excrement in the central portion of the absorber 4 in the longitudinal direction L, and to relatively increase the amount of absorbable excrement in the end portion in the longitudinal direction L. there is. Here, the central part in the longitudinal direction roughly corresponds to the excretory contact area. Therefore, it is possible to make it difficult for the excreted excretion to stay in the central portion, and it is possible to make it easy to diffuse toward the end of the longitudinal direction (L). However, the distance between the central portions in the longitudinal direction L in the pair of heat embossed portions 5 and 5 is 100% of the width in the width direction W of the central portion in the longitudinal direction L of the absorber 4 As such, it is preferably 30% or more and 70% or less, and more preferably 40% or more and 60% or less. In addition, the distance between the ends in the longitudinal direction L in the pair of heat embossing portions 5 and 5 is the width in the width direction W of the end portion in the longitudinal direction L of the absorber 4 100% As such, it is preferably 35% or more and 95% or less, and more preferably 45% or more and 85% or less.

As a preferable aspect in this embodiment, the length (E2W) of the width direction W in each of a pair of other heat embossing parts 6 and 6 of the width direction W of the absorber 4 Taking the length AW as 100%, it is preferably 10% or more and 70% or less, and more preferably 20% or more and 60% or less. As a result, diffusion of the excretion in the longitudinal direction L can be blocked by the other heat-sealed portion 6t and guided to the region between the adjacent other heat-sealed portions 6t and 6t. In the case of less than 10%, the excretion is excessively diffused to a region outside the pair of other heat embossed portions 6 and 6 in the absorber 4 in the longitudinal direction L, and the outer side in the longitudinal direction L. There is a risk of leakage. In the case of more than 70%, the excretion is outside the longitudinal direction L of the pair of other heat embossed portions 6 and 6 in the absorber 4 and spreads to regions near both ends in the width direction W. It becomes difficult to become, and there exists a possibility that the absorber 4 may become unable to be used efficiently.

As a preferable aspect in this embodiment, in a pair of other heat embossing parts 6 and 6, the distance E2Wa in the longitudinal direction L between the center portions in the width direction W is the width It is preferable that it is longer than the distance E2Wb in the longitudinal direction L between the ends in the direction W. That is, the other pair of thermal embossing portions 6 and 6 have a shape in which the central portion in the width direction W bulges outward. Therefore, in the central part of the width direction W, the area inside the pair of other heat embossing parts 6 and 6 can be widened. In other words, the amount of excretion that can be absorbed in the central portion of the absorber in the width direction W can be increased. Therefore, the excreted excrement can be more easily spread to the end of the longitudinal direction (L). However, the distance in the longitudinal direction L between the central portions in the width direction W in the pair of other heat embossed portions 6 and 6 is the longitudinal direction of the central portion in the width direction W of the absorber 4 ( With the length of L) as 100%, it is preferably 35% or more and 85% or less, and more preferably 45% or more and 80% or less. In addition, the distance in the longitudinal direction L between the ends in the width direction W in the pair of other heat embossing portions 6 and 6 is the longitudinal direction of the end portion in the width direction W of the absorber 4 ( With the length of L) as 100%, it is preferably 30% or more and 80% or less, and more preferably 40% or more and 75% or less.

In the example of FIG. 2 , the thermally fused portion 5t includes a bottom portion 5tB and a side wall portion 5tW. However, in another embodiment, the thermally fused portion 5t may include a bottom portion and a circumferential wall portion (not shown). The bottom portion is a high-density portion where the topsheet 2 and at least the liquid-permeable sheet 4b are thermally fused to each other in the thickness direction T. The bottom portion and the bottom portion 5tB in Fig. 2 are the same. The circumferential wall portion is formed standing upright to enclose the bottom portion in a tubular shape in the thickness direction T, and is a wall portion in which the topsheet 2 and at least the liquid-permeable sheet 4b are thermally fused to each other in the thickness direction T. The height of the circumferential wall portion in the thickness direction is, for example, about twice the thickness of the bottom portion or about 1/3 the thickness of the absorber 4 (the remainder being the side wall portion). The circumferential wall portion and the side wall portion 5tW in Fig. 2 differ from each other in that the circumferential wall portion is formed by thermal fusion similarly to the bottom portion. That is, the circumferential wall portion is formed by melting the topsheet 2 and at least the liquid-permeable sheet 4b with each other by heat and then cooling and hardening, whereas the side wall portion 5tW in FIG. The permeable sheet 4b is formed by being laminated without melting. Such a circumferential wall portion can be formed by relatively increasing the energy supplied during heat embossing (e.g., heating temperature high, heating/compression time long, ultrasonic horn used during compression). . When the heat-sealed portion 5t has a circumferential wall portion, compared to the heat-sealed portion 5t having a sidewall portion 5tW in FIG. 2, the circumferential wall portion is less deformable. It can be more reliably held between the adjacent thermally fused portions 5t and 5t. Further, the other heat-sealed portion 6t may also include a bottom portion and a circumferential wall portion in the same manner.

<Distance between heat-sealed parts>

The distance between the heat-sealed parts was measured by the following method. (1) A light incontinence pad was cut out to a size of 20 × 40 mm centering on the region to be measured, and used as a sample. (2) A 360-degree scan of the sample was performed using an X-ray fluoroscopy device FLEX-M863 (manufactured by Beamsense Co., Ltd.). Specifically, an X-ray fluoroscopy image was taken every time the sample was rotated by 0.2 degrees, 360 degrees, that is, 1800 X-ray fluoroscopy images were acquired, and the acquired 1800 X-ray fluoroscopy images were linked together to create a 3D image. (3) A cross-sectional view including the edge of the object to be measured was extracted from the 3D image, and the distance between the edges of the heat-sealed part was measured from the extracted cross-sectional view to be the distance between the heat-sealed parts.

<Basic Weight of Super Absorbent Polymer>

The basis weight of the superabsorbent polymer was measured by the following method. (1) The dimensions of the region to be measured in a planar view of the light incontinence pad were measured to determine the area of the region to be measured. (2) A region to be measured was cut out from the light incontinence pad and used as a sample. (3) Only the superabsorbent polymer was carefully taken out from the sample, and the mass of the superabsorbent polymer taken out was measured. (4) The basis weight was calculated by dividing the mass of the superabsorbent polymer taken out by the area of the region to be measured. (5) The average basis weight of the three samples was taken as the basis weight of the superabsorbent polymer.

<Adhesion strength test>

The adhesive strength of the heat-sealed part was measured by the following method. (1) From the light incontinence pad, a laminated body of a topsheet and an absorbent body was taken out and cut to a width of 25 mm to obtain a sample. At that time, the liquid-permeable sheet on the skin side and the liquid-permeable sheet on the non-skin side were cut so as to be separated. (2) Ends in the longitudinal direction of each of the topsheet and the liquid-permeable sheet on the non-skin side of the sample were sandwiched between chucks (distance between chucks 10 mm) of a tensile tester. (3) With a tensile tester, the topsheet and the liquid-permeable sheet on the non-skin side were stretched so as to be peeled in the 180° direction, and the load value was measured. (4) The maximum value of the measured load value was taken as the joint strength (N/25 mm).

Example

Hereinafter, examples and comparative examples are shown to explain the present invention in more detail. However, the present invention is not limited only to these examples.

(1) sample

As a sample of Example 1, a light incontinence pad of the embodiment shown in Figs. 1 and 2 was produced. As a sample of Comparative Example 1, a light incontinence pad similar to Example 1 was produced except that the heat embossed portion had a heat fused portion continuously formed in the form of a groove instead of a plurality of heat fused portions formed intermittently.

However, in the sample of Example 1, the distance between adjacent heat-sealed parts at that time was 2.4 mm, the basis weight of the superabsorbent polymer between adjacent heat-sealed parts was 40 g/m 2 , and between adjacent heat-sealed parts The distance of and the basis weight of the superabsorbent polymer in that region were also the same. The shape in plan view of each of the thermally fused portion and the other thermally fused portion is a square, so the ratio of the first side to the second side is 1:1, and the thermally fused portion and the other thermally fused portion respectively have a square shape in planar view. The area in was 1 mm 2 . The length in the longitudinal direction of each of the pair of hot embossed portions was 60% of the length in the longitudinal direction of the absorber. In a pair of heat-embossed parts, the distance in the width direction between the central parts in the longitudinal direction was 50% of the width of the absorber, and the distance in the width direction between the ends in the longitudinal direction was 70% of the absorber. The length in the width direction of each of the pair of other heat embossed portions was 55% of the length in the width direction of the absorber. The distance in the longitudinal direction between the central portions in the width direction in the pair of other heat embossed portions 6 and 6 is 80% of the length of the absorber, and the distance in the longitudinal direction between the ends in the width direction is 80% of the length of the absorber 4. It was 75% of the length. Further, in the absorber, the basis weight of the superabsorbent polymer existing in the region between the adjacent heat-sealed portions was relatively higher than that of the superabsorbent polymer present in other regions.

(2) Evaluation method of absorption performance

To the central portion of the sample (the portion where the center line in the longitudinal direction (CL) and the center line in the width direction (CW) of FIG. 1 intersect), 3 cc of physiological saline solution diluted with urine was dropped from a height of 30 cm every 30 seconds. Then, for each drip of the physiological saline, the time from when the physiological saline reaches the surface of the topsheet in the central portion of the sample to when the physiological saline disappears from the surface of the topsheet, that is, the time required for absorption of the physiological saline (hereinafter , referred to as "absorption time") was measured.

(3) Evaluation results

Table 1 shows the evaluation results of absorption performance. As shown in Table 1, in the samples of Example 1, the absorption time hardly changed from the first to at least the fifth drop times. On the other hand, in the sample of Comparative Example 1, the absorption time increased as the number of drops increased. Specifically, with respect to the absorption time A of the sample of Example 1, the absorption time B of the sample of Comparative Example 1 hardly changed at 1.0 times in the first time, but increased by 1.2 times in the second time, 2.2 times in the third time, and 4 times in the fourth time. was 4.3 times, and the 5th time was 7.0 times. That is, in the sample of Example 1, almost no change was observed in the absorption performance regardless of the number of times, but in the sample of Comparative Example 1, it was found that the absorption performance deteriorated as the number of times increased. This is considered to be because the sample of Example 1 is not a thermal embossed portion continuously formed in a groove shape, but a plurality of thermally fused portions formed intermittently. On the other hand, the adhesive strength of the heat-sealed part and the other heat-sealed part was 0.1 to 0.3 N/25 mm, which was a value that was satisfactory for use.

The absorbent article of the present invention is not limited to each embodiment described above, and can be appropriately combined or modified within a range not departing from the purpose or spirit of the present invention.

1: Light incontinence pad (absorbent article)
2: surface sheet
3: back sheet
4: absorber
5: heat embossing part
5t: heat fusion part
40: super absorbent polymer

Claims (13)

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, comprising a topsheet and an absorbent body positioned on a non-skin side of the topsheet, comprising:
The absorber includes a superabsorbent polymer and heat-sealable fibers,
The absorbent article has a pair of heat embossed portions arranged at intervals in the width direction,
Each of the pair of thermal embossing parts,
It extends along the longitudinal direction and is recessed from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber in the thickness direction;
Including a plurality of thermal fusion parts intermittently located along the longitudinal direction,
The plurality of heat-sealed portions do not include pulp fibers,
The superabsorbent polymer is present at least in a region between adjacent heat-sealed parts in the longitudinal direction among the plurality of heat-sealed parts;
In the pair of heat embossed portions, the absorbent article wherein a distance in the width direction between the central portions in the longitudinal direction is shorter than the distance in the width direction between the ends in the longitudinal direction. The method of claim 1, wherein the distance between adjacent thermally fused portions in the plurality of thermally fused portions is 0.5 mm or more and 5 mm or less, and the basis weight of the superabsorbent polymer between the adjacent thermally fused portions is 20 g / An absorbent article of at least m2 and not more than 80 g/m2. The absorbent article according to claim 1 or 2, wherein the length in the longitudinal direction of each of the pair of heat embossed portions is 30% or more and 80% or less of the length of the absorber in the longitudinal direction. delete The method of claim 1 or 2, further comprising a pair of other heat embossed portions arranged at intervals in the longitudinal direction,
Each of the pair of other thermal embossing parts,
extends along the width direction and is recessed from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber in the thickness direction;
Including a plurality of other thermal fusion parts intermittently located along the width direction,
The plurality of other heat-sealed portions do not include pulp fibers,
The absorbent article according to claim 1 , wherein the superabsorbent polymer is present at least in a region between other heat-sealed parts adjacent to each other in the width direction among the plurality of other heat-sealed parts. The absorbent article according to claim 5, wherein a length in the width direction in each of the pair of other heat embossed portions is 10% or more and 70% or less of the length in the width direction of the absorber. The water absorbency according to claim 5, wherein in the pair of other heat embossing portions, the distance in the longitudinal direction between the center portions in the width direction is longer than the distance in the longitudinal direction between the ends in the width direction. article. The absorbent according to claim 1 or 2, wherein in the absorber, the basis weight of the superabsorbent polymer present in the region between the adjacent heat-sealed portions is higher than the basis weight of the superabsorbent polymer present in other regions. article. The shape of the thermally fused portion in plan view is rectangular according to claim 1 or 2,
The rectangle is positioned such that a first side of the rectangle is along the longitudinal direction and a second side adjacent to the first side is along the width direction,
The absorbent article wherein the ratio of the first side to the second side is 1:0.7 to 1:1.3. The absorbent article according to claim 1 or 2, wherein an area of the heat-sealed portion in plan view is 0.5 mm 2 or more and 5 mm 2 or less. The absorbent article according to claim 1 or 2, wherein the heat-sealed portion has an adhesive strength of 0.05 N/25 mm or more and 1 N/25 mm or less. The absorbent article according to claim 1 or 2, wherein the surface facing inward in the width direction in the heat-sealed portion is a flat surface along the longitudinal direction or a curved surface concave inward in the width direction. The absorbent article according to claim 1 or 2, wherein the surface of the heat-sealed portion facing the longitudinal direction is a plane along the width direction.

Images