JP2019154670A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of efficiently using an absorber as a whole in the absorbent article having a pair of heat embossment parts.SOLUTION: An absorber 4 of an absorbent article includes high absorbent polymers and thermal adhesive fiber. The absorbent article has a pair of heat embossment parts 5, 5 arranged in a width direction at intervals. The respective heat embossment parts 5 include a plurality of heat-seal parts 5t which are extended along a longitudinal direction, recessed toward the surface on a non-skin side of the absorber 4 from the surface on the skin side of a surface sheet 2 in a thickness direction, and are intermittently positioned along the longitudinal direction. The heat-seal parts do not include pulp fiber. The high absorbent polymers are present in areas between adjacent heat-seal parts in the longitudinal direction of among at least a plurality heat-seal parts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article.

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

JP 2017-158654 A

  In the absorbent article described in Patent Document 1, a heat embossed part may be used as the embossed part. The heat embossed part is formed by heat-sealing while pressing the top sheet and the absorbent body. However, when the surface sheet or the absorbent body contains fibers that do not have heat-fusible properties such as pulp fibers, the adhesive strength of the hot embossed portion may be reduced. Therefore, by continuously extending the hot embossed portion along the longitudinal direction, it is possible to increase the bonding strength of the entire hot embossed portion, and to prevent the heat fusion portion of the hot embossed portion from being peeled off. And each of a pair of heat embossed part was continuously extended along the longitudinal direction the excrement (example: urine) which reached the heat embossed part directly from the upper part or the surface of a surface sheet. It can be made to circulate to the front and back in the longitudinal direction through the recess of the heat embossed portion. However, since the heat embossed part is formed by melting and solidifying the fiber with heat, the liquid cannot permeate and diffuse inside. Therefore, it is difficult for the excrement to diffuse from the region between the pair of heat embossed portions to the region outside in the width direction beyond each heat embossed portion. Therefore, when the excrement is absorbed in the region between the pair of heat embossed portions of the absorber, the body diffuses toward both outer sides in the width direction, but is blocked by the pair of heat embossed portions. Therefore, it is difficult to substantially diffuse into the absorber outside the pair of heat embossed portions. Therefore, it is difficult to sufficiently absorb the excrement in a portion outside the pair of heat embossed portions in the width direction of the absorber, and it is difficult to use the absorber efficiently.

  Then, the objective of this invention is providing the absorbent article which can use an absorber as a whole efficiently in the absorbent article which has a pair of heat embossing part.

  The absorbent article of the present invention is as follows. (1) An absorbent article having a longitudinal direction, a width direction, and a thickness direction, comprising a top sheet and an absorbent body located on a non-skin side of the top sheet, wherein the absorbent body is highly absorbent. The absorbent article includes a pair of hot embossed portions arranged at intervals in the width direction, and each of the pair of hot embossed portions includes It extends along the longitudinal direction, is recessed from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber in the thickness direction, and is intermittently positioned along the longitudinal direction The plurality of heat fusion portions include a plurality of heat fusion portions, the plurality of heat fusion portions do not include pulp fibers, and the superabsorbent polymer is at least one of the plurality of heat fusion portions adjacent to the longitudinal direction in the heat fusion portion. Absorbent article that exists in the area between the wearing parts.

In the present absorbent article, the pair of heat embossed portions has a plurality of heat fusion portions that are intermittently positioned in the longitudinal direction, and each heat fusion portion does not contain pulp fibers.
As described above, since the heat-sealed portion is formed without including pulp fibers which are absorbent materials that are hardly heat-sealed, the bonding strength by the heat-sealed portion can be increased. That is, even if the heat fusion part (heat embossed part) is not continuously formed along the longitudinal direction, it can be made difficult to peel off. Therefore, it is not necessary to form the heat fusion part continuously in a groove shape along the longitudinal direction, and thus excrement is transferred to the pair of heat via a region between the plurality of intermittently formed heat fusion parts. Can diffuse widely outside the embossed part.
In addition, excrement is excreted in the vicinity of the center of the absorbent article, and when it diffuses in the absorbent body at substantially the same speed in the width direction and the longitudinal direction, it easily reaches a pair of heat embossed portions in the width direction. Therefore, in the width direction, in the initial stage of absorption of excrement by the absorber, for example, when excrement is absorbed for the first time, excrement that diffuses in the width direction is blocked by the heat-sealed portion, It can guide | invade to the area | region between adjacent heat-fusion parts. That is, excrement can be circulated in a region between adjacent heat-sealed portions where the superabsorbent polymer exists. And the excrement which distribute | circulated the area | region between adjacent heat-fusion parts can be guide | induced to the outer absorber of the width direction W rather than a pair of heat embossing part. Thereby, the excretion can be absorbed by the outer absorbent body.
At that time, as excrement flows through the region between the adjacent heat fusion parts, the superabsorbent polymer existing in the region between the adjacent heat fusion parts absorbs the excrement, and gradually It swells and eventually closes the region between adjacent heat-sealed parts so that excrement becomes difficult to flow.
Therefore, at the time of subsequent absorption of excrement by the absorber, for example, absorption of excrement for the second time, excrement is present in a region between a plurality of fusion parts and adjacent heat fusion parts. It is blocked by the polymer and cannot diffuse outward in the width direction from the pair of heat embossed portions. Thereby, excrement can be diffused to the front and back in the longitudinal direction with a margin for absorption. Further, it is possible to prevent the excrement from diffusing excessively outward in the width direction from the pair of heat embossed portions and leaking to the outer side in the width direction.
Therefore, excrement can be absorbed over a wide range in the width direction and the longitudinal direction. Thereby, it becomes possible to use an absorber efficiently as a whole. Moreover, even when the amount of excretion is large, such as excretion a plurality of times, it is possible to prevent the excrement from being absorbed without being absorbed.

In the absorbent article of the present invention, (2) a distance between adjacent heat fusion portions in the plurality of heat fusion portions is 0.5 mm or more and 5 mm or less, and between the adjacent heat fusion portions. The absorbent article according to (1) above, wherein the basis weight of the superabsorbent polymer is 20 g / m ² or more and 80 g / m ² or less.
In the present absorbent article, the distance between the 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, the superabsorbent polymer having a predetermined basis weight is disposed in a region between the predetermined heat-sealed portions. Thereby, the excrement can be initially distributed between the adjacent heat-sealed portions, and thereafter the excrement can be blocked with the swollen superabsorbent polymer.

In the absorbent article of the present invention, (3) 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 in the longitudinal direction of the absorber. The absorbent article according to (1) or (2) may be used.
In the present absorbent article, the length in the longitudinal direction of each heat embossed portion is 30% or more and 80% or less of the length in the longitudinal direction of the absorbent body. Therefore, the diffusion of the excrement in the width direction can be more reliably blocked by the heat fusion part and can be guided to the region between the adjacent heat fusion parts.

In the absorbent article of the present invention, (4) in the pair of heat embossed portions, the distance in the width direction between the center portions in the longitudinal direction is greater than the distance in the width direction between the end portions in the longitudinal direction. The absorbent article according to any one of (1) to (3) above may be used.
In this absorbent article, in the pair of heat embossed portions, the distance between the center portions in the longitudinal direction is shorter than the distance between the end portions in the longitudinal direction. That is, the pair of heat embossed portions has a shape in which the central portion in the longitudinal direction is narrowed inward. Therefore, the area of the region inside the pair of heat embossed portions can be relatively narrowed at the center portion in the longitudinal direction, and the area of the inside of the pair of heat embossed portions can be relatively widened at the end portions in the longitudinal direction. In other words, the amount of excreta that can be absorbed at the center in the longitudinal direction of the absorber can be relatively reduced, and the amount of excreta that can be absorbed at the end in the longitudinal direction can be relatively increased. Here, the central portion in the longitudinal direction substantially corresponds to the excretory opening contact area. Therefore, excreted excreted matter can be prevented from staying in the central portion, and can be easily diffused toward the end portion 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, and each of the pair of other heat embossed portions extends along the width direction. A plurality of other portions that are recessed in the thickness direction from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber, and are intermittently positioned along the width direction. The plurality of other heat fusion portions include a heat fusion portion, the pulp fibers are not included, and the superabsorbent polymer is adjacent to at least the width direction of the plurality of other heat fusion portions. The absorbent article according to any one of (1) to (4) above, which exists in a region between other heat-sealed portions.
In the present absorbent article, a pair of other heat embossed portions have a plurality of other heat fusion portions that are intermittently positioned in the width direction, and each other heat fusion portion does not contain pulp fibers.
As described above, the other heat-sealed portion is formed without including the pulp fiber which is an absorbent material which is hardly heat-fused, and therefore, the bonding strength by the other heat-fused portion can be increased. That is, even if other heat fusion parts (other heat embossed parts) are not continuously formed along the width direction, they can be made difficult to peel off.
Further, in the longitudinal direction, for example, when the excrement is absorbed for the second time by the absorber, the excrement diffusing in the longitudinal direction is blocked at the position of the other heat-sealed portion, and the excrement is adjoined by the other. It is possible to guide to the region between the heat-sealed portions. That is, excrement can be circulated in a region between other heat fusion parts adjacent to each other where the superabsorbent polymer exists. And the excrement which distribute | circulated the area | region between the other adjacent heat-fusion part can be guide | induced to the absorber of the outer side of the longitudinal direction L rather than a pair of other heat embossing part. Thereby, the excretion can be absorbed by the outer absorbent body.
At that time, as the excrement flows through the region between the other adjacent heat fusion parts, the superabsorbent polymer existing in the region between the other adjacent heat fusion parts absorbs the excrement. Then, it gradually swells, and eventually closes the region between other adjacent heat-sealed portions so that excrement becomes difficult to circulate.
Therefore, at the time of the subsequent absorption of excrement by the absorber, for example, the excretion of excretion for the third time, the excrement exists in a region between a plurality of other heat-adhering portions and other adjacent heat-adhering portions. It is blocked by the superabsorbent polymer, and cannot diffuse to the outside in the longitudinal direction from the pair of other heat embossed portions. Thereby, excrement can be diffused in the both ends of the width direction in the front and back in the longitudinal direction with sufficient absorption. Further, it is possible to prevent the excrement from diffusing too much in the longitudinal direction outside the pair of other heat embossed portions and leaking to the outside in the longitudinal direction. Therefore, excrement can be absorbed over the entire width direction and longitudinal 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 absorbent body. The absorbent article described in (5) above may be used.
In the present absorbent article, the length in the width direction of each of the other heat embossed portions is 10% or more and 70% or less of the length in the width direction of the absorber. Therefore, the diffusion of the excrement in the longitudinal direction can be more reliably blocked by the other heat fusion part, and can be guided to the region between the other heat fusion parts adjacent to each other.

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 greater than the distance in the longitudinal direction between the end portions in the width direction. The absorbent article according to the above (5) or (6) may also be used.
In the present absorbent article, in the pair of heat embossed portions, the distance between the center portions in the width direction is longer than the distance between the end portions in the width direction. That is, the pair of other heat embossed portions has a shape in which the central portion in the width direction bulges outward. Therefore, the inner area of the pair of other heat embossed portions can be expanded in the center portion in the width direction. In other words, it is possible to increase the amount of excreta that can be absorbed in the central portion of the absorbent body in the width direction. Therefore, the excreted excreta can be more easily diffused to the end portion 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 a region between adjacent heat-sealed portions is the superabsorbent in other regions. The absorbent article according to any one of (1) to (7), wherein the absorbent article is higher than the basis weight of the polymer.
In the present absorbent article, the basis weight of the superabsorbent polymer existing in the region between the heat fusion parts in the absorbent body is higher than the basis weight of the superabsorbent polymer present in the other region. Therefore, when excrement is blocked with the swollen superabsorbent polymer, the excrement can be blocked more reliably. In addition, if the superabsorbent polymer blocks the excrement and diffuses in the longitudinal direction (and the width direction) and further absorbs the excrement and swells, the heat-sealed part cannot withstand the swelling force. Finally, the heat fusion part is peeled off. Therefore, the excrement can be diffused again in the width direction (longitudinal direction) through the heat fusion part. As a result, even if the excrement is not absorbed by the high-absorbent polymer blockage, the blockage is weakened so that the excrement can flow into the region. Can be absorbed.

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 first side and the side The absorbent article according to any one of (1) to (8) above, in which the ratio to the second side is 1: 0.7 to 1: 1.3.
In the present absorbent article, the heat-sealed portion has a rectangular shape with an aspect ratio of 1: 0.7 to 1: 1.3 in plan view. Therefore, excrement that diffuses outward in the width direction can be more accurately blocked by the surface forming the first side, that is, the surface substantially perpendicular to the width direction. In addition, the superabsorbent polymer that absorbs excrement and swells can be held so as not to move with excrement by being sandwiched from both sides by the surface forming the second side, that is, the surface substantially along the width direction. .

The absorbent article of the present invention is (10) any one of the above (1) to (9), wherein an area of the heat-sealed portion in a plan view is 0.5 mm ² or more and 5 mm ² or less. The absorbent article described may be used.
In the present absorbent article, the heat fusion part has an area of 0.5 mm ² or more and 5 mm ² or less in plan view. Therefore, the heat-sealing part can accurately block excrement that diffuses outward in the width direction, and absorbs the excrement so that the swollen superabsorbent polymer does not move with the excrement. Can be held.

The absorbent article of the present invention is (11) the adhesive strength of the heat fusion part is 0.05 N / 25 mm or more and 1 N / 25 mm or less, according to any one of the above (1) to (10). Absorbent articles may be used.
In the present absorbent article, the adhesive strength of the heat fusion part is 0.05 N / 25 mm or more and 1 N / 25 mm or less. Therefore, in the initial swelling of the superabsorbent polymer, the heat-sealed portion does not peel off, and the swollen superabsorbent polymer blocks the excrement that the swollen superabsorbent polymer tries to diffuse in the width direction between adjacent heat-sealed portions. be able to. Thereby, excrement can be diffused in the longitudinal direction. Further, when the superabsorbent polymer swells to some extent, it cannot withstand the swelling force, and eventually the heat-sealed part is peeled off. Thereby, excrement can be again diffused in the width direction via the heat fusion part. As a result, even if the excrement is not absorbed by the high-absorbent polymer blockage, the blockage is weakened so that the excrement can flow into the region. Can be absorbed.

In the absorbent article of the present invention, (12) a surface facing the inner side in the width direction in the heat-sealed portion is a flat surface along the longitudinal direction, or a curved surface concave on the inner side in the width direction. The absorbent article according to any one of 1) to (11) may be used.
In the present absorbent article, the surface facing the inner side in the width direction (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 side of the absorbent article, or A curved surface that is concave on the inner side in the width direction, that is, a curved surface that is concave with respect to the center side of the absorbent article. Thereby, the excrement which is going to diffuse to the outside of the width direction can be blocked more reliably.

The absorbent article of the present invention is (13) any one of (1) to (12), wherein a surface facing the longitudinal direction in the heat-sealed portion is a plane along the width direction. Absorbent article.
In the present absorbent article, a surface facing the longitudinal direction in the heat-sealed portion (a surface substantially perpendicular to the longitudinal direction L), that is, a surface facing each other in the adjacent heat-fused portion is a plane along the width direction. Therefore, the superabsorbent polymer which absorbs excrement and swells can be more reliably held between the surfaces facing each other.

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

It is a top view which shows the structure of the absorbent article which concerns on embodiment. It is sectional drawing which follows the II-II line | wire of FIG. It is a schematic diagram explaining the effect | action of a light incontinence pad. It is a top view which shows the structure of an absorber.

  Hereinafter, the light incontinence pad 1 is demonstrated to an example about the absorbent article which concerns on embodiment. In this case, the excrement that is the absorption target of the light incontinence pad 1 is urine. However, the type and application of the absorbent article are not limited to this example, and other absorbent articles may be used without departing from the scope of the gist of the present invention. Examples of such absorbent articles include panty liners, sanitary napkins, and disposable diapers.

  1-2 is a figure which shows the structure of the light incontinence pad 1 which concerns on embodiment. However, FIG. 1 shows a plan view of the light incontinence pad 1 in a developed state, and FIG. 2 shows a sectional view taken along the line II-II in FIG. The light incontinence pad 1 has a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other, a longitudinal center line CL extending in the longitudinal direction L through the center of the width direction W, and a center of the longitudinal direction L. And a width direction center line CW extending in the width direction W. The directions approaching and moving away from the longitudinal center line CL are defined as the inner and outer directions of the width direction W, respectively. The direction approaching and moving away from the center line CW in the width direction is defined as the direction inside and outside the longitudinal direction L, respectively. “Plan 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” is grasped by the plan view. The shape. “Skin side” and “non-skin side” mean a side closer to and far from the skin surface of the wearer in the thickness direction T when the light incontinence pad 1 is worn by the wearer. To do. 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 for each material of the light incontinence pad 1 as well as the light incontinence pad 1.

  As shown in FIG. 1, the light incontinence pad 1 has, in plan view, both ends in the longitudinal direction L of a rectangle having a long side extending in the longitudinal direction L and a short side extending in the width direction W swelled in an arc shape. It has a shape. However, in the present embodiment, the shape of the light incontinence pad 1 is not limited to such a shape, and may be any as long as the length dimension in the longitudinal direction L is longer than the width dimension in the width direction W. A vertically long shape (eg, rectangular, elliptical, bowl-shaped, hourglass-shaped) can be used.

  As shown in FIG. 2, the light incontinence pad 1 includes a top sheet 2, a back sheet 3, and a non-skin side of the top sheet 2, that is, an absorbent body 4 positioned between the top sheet 2 and the back sheet 3. It has. The light incontinence pad 1 also has a pair of heat embossed portions 5 and 5 arranged at intervals in the width direction W. Each heat embossed portion 5 extends along the longitudinal direction L, and has a configuration that is recessed in the thickness direction T from the skin side surface of the topsheet 2 toward the non-skin side surface of the absorbent body 4. Yes. The heat embossed portion 5 is formed by heat-sealing the topsheet 2 and the absorbent body 4 while pressing the topsheet 2 and the absorbent body 4 from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorbent body 4 (heat-embossed). processing). In the present embodiment, as shown in FIG. 1, the light incontinence pad 1 further includes a pair of other heat embossed portions 6 and 6. Each of the other heat embossed portions 6 extends along the width direction W and has a configuration that is recessed in the thickness direction T from the skin-side surface of the topsheet 2 toward the non-skin-side surface of the absorbent body 4. is doing. Similarly to the heat embossed portion 5, the other heat embossed portions 6 are heated while pressing the topsheet 2 and the absorbent body 4 from the skin-side surface of the topsheet 2 toward the non-skinned surface of the absorbent body 4. It is formed by fusing (thermal embossing).

  However, a certain direction D is a direction along the longitudinal direction L is not only the case where the direction D is parallel to the longitudinal direction L, but the component Dx of the longitudinal direction L of the direction D is a component of the width direction W of the direction D. It also includes the case where it is larger than Dy (Dx> Dy). Similarly, a certain 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 A case where the component is larger than the component Dx (Dy> Dx) is also included. As for the curve, a certain direction D is evaluated as described above with respect to the tangent of each point on the curve.

  The light incontinence pad 1 has a region that contacts the wearer's excretion port when worn, that is, an excretion port contact region XA, in a region where the topsheet 2 and the absorbent body 4 overlap in the thickness direction T. In the present embodiment, the excretory opening contact area XA has a pair of heat embossed portions 5 and 5 and a pair of other heat embossed portions 6 around the intersection of the longitudinal centerline CL and the widthwise centerline CW. 6 is an inner region. The excreta is excreted mainly in the excretion opening contact area XA, absorbed, and then diffused around the excrement. Specifically, the excretory opening contact area XA is, for example, a length approximately ¼ to ½ of the entire length of the absorbent body 4 at a substantially central portion in the longitudinal direction L of the absorbent body 4 and a substantially central portion in the width direction W. This is a region having a width of about 1/2 to 1/3 of the entire width of the absorber 4. However, the excretion opening contact area XA can be appropriately changed depending on the type of the absorbent article, the sex of the wearer of the absorbent article, and the age group.

The top sheet 2 has the same planar shape as that of the light incontinence pad 1 and is located on the skin side of the light incontinence pad 1. The top sheet 2 is a sheet having liquid permeability. The top sheet 2 is not particularly limited as long as it is a sheet that is formed of a heat-fusible fiber or a heat-fusible material and has liquid permeability from the viewpoint of heat fusing in heat embossing. Examples of the surface sheet 2 include a liquid-permeable nonwoven fabric or woven fabric formed of heat-fusible fibers, a synthetic resin film having liquid-permeable holes formed of a heat-fusible material, and a composite sheet thereof. . In the present embodiment, a liquid-permeable air-through nonwoven fabric made of heat-fusible fibers is used. The basis weight of the surface sheet 2, for example ^{5 g} / m 2 to 100 g / ^{m 2} and the like, preferably ^{20g / m 2 ~50g / m 2} . As for the thickness of the surface sheet 2, 0.2-3 mm is mentioned, for example.

  The back sheet 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 liquid-impermeable sheet, and examples thereof include a liquid-impermeable nonwoven fabric and a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, and an SMS nonwoven fabric. In the present embodiment, an SMS nonwoven fabric having liquid impermeability is used.

  The absorber 4 has a planar shape similar to the planar shape of the light incontinence pad 1 and is included between the top sheet 2 and the back sheet 3. The non-skin side surface of the top sheet 2 and the skin side surface of the absorber 4 are joined to each other, and the non-skin side surface of the absorber 4 and the skin side surface of the back sheet 3 are joined to each other. . The peripheral portion of the non-skin side surface of the top sheet 2 and the peripheral portion of the skin side surface of the back sheet 3 are joined to each other. The absorber 4 is a layer having liquid absorption performance and liquid retention performance, and includes a superabsorbent polymer and heat-fusible fibers. As for the thickness of the absorber 4, 1 mm-5 mm are mentioned, for example. In this Embodiment, the absorber 4 contains the absorptive material 4a and the liquid-permeable sheet 4b which includes the absorptive 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 may be included in the liquid permeable sheet 4b without being fixed. .

The absorbent material 4a has a superabsorbent polymer 40. The superabsorbent polymer 40 is not particularly limited as long as it can absorb and retain moisture, and examples thereof include starch-based, acrylic acid-based, amino acid-based particulate or fibrous superabsorbent polymer (SAP). . The basis weight of the superabsorbent polymer 40 can be adjusted as appropriate according to the absorption performance required for the light incontinence pad 1, and may be 10 to 500 g / m ² , for example, and preferably 100 to 400 g / m ² . . The absorbent material 4a may further have water-absorbing fibers such as pulp fibers and hydrophilic heat-fusible fibers. As for content of a water absorbing fiber, the range of 0-50% of the mass of the superabsorbent polymer 40 is mentioned, for example. However, from the viewpoint of heat fusion in heat embossing, the absorbent material 4a is configured so as not to include pulp fibers in a region of a heat fusion portion (described later) of the heat emboss portion. In this Embodiment, the absorptive material 4a is comprised only with the superabsorbent polymer 40, and does not contain a water absorbing fiber. In another embodiment, the absorbent material 4 a includes pulp fibers and / or hydrophilic heat-fusible fibers in addition to the superabsorbent polymer 40, but the heat-fused portion (described later) of the heat embossed portion 5. ) Is configured not to contain pulp fibers.

The liquid-permeable sheet 4b is not particularly limited as long as it is a sheet that is formed of heat-fusible fibers and does not contain pulp fibers and has liquid permeability from the viewpoint of heat fusion in heat embossing. Examples of the liquid-permeable sheet 4b include hydrophilic non-woven fabrics such as liquid-permeable non-woven fabrics, laminated non-woven fabrics, and tissues formed of heat-fusible fibers. The basis weight of the liquid-permeable sheet 4b, for example ^2g / ^{m 2 ~80g} / m 2 and the like, preferably ^{10g / m 2 ~40g / m 2} . In this embodiment, an air-through nonwoven fabric that is formed of heat-fusible fibers and does not contain pulp fibers and has liquid permeability is used. The liquid permeable sheet 4b may have a configuration in which a plurality of sheets including heat-fusible fibers and not including pulp fibers are laminated.

  Note that one or more other liquid-permeable sheets may be provided between the top sheet 2 and the absorber 4. For example, the well-known sheet | seat which provides liquid diffusibility and cushioning property to the light incontinence pad 1 is mentioned. The liquid-permeable sheet is not particularly limited as long as it is formed of heat-fusible fibers from the viewpoint of heat-sealing in heat embossing and does not include pulp fibers. Moreover, you may have a tissue between the back surface sheet 3 and the absorber 4 in order to supplement an absorptive performance.

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

  In the present embodiment, the shape (or pattern) of the pair of heat embossed portions 5 and 5 has a gentle arc shape (a gentle bow shape) that is convex with respect to the longitudinal center line CL in plan view. is doing. 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 becomes large (expands) toward both outer sides in the longitudinal direction L. is there. The shape is symmetrical with respect to the longitudinal center line CL and symmetrical with respect to the width direction center line CW. The pair of heat embossed portions 5 and 5 are extended to the vicinity of both end portions of the absorber 4 in the longitudinal direction L, and are extended to the vicinity of both end portions of the absorber in the width direction W. The width of the hot embossed part 5 is preferably 0.5 to 4 mm, more preferably 1 to 2 mm. However, the shape of the pair of heat embossed portions 5 and 5 is not limited to this example, and may have other shapes. Examples of other shapes include a shape parallel to the longitudinal direction L and a shape that is concave with respect to the longitudinal center line CL.

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

  In the heat-sealed portion 5t, the surface sheet 2 and the liquid-permeable sheet 4b on the skin side of the absorbent body 4 are depressed toward the non-skin side in the thickness direction T, and the liquid permeability on the non-skin side of the absorbent body 4 is obtained. The sheet 4b is heat-sealed together. In the present embodiment, the heat-sealing part 5t includes a bottom part 5tB in which the top sheet 2 and the liquid-permeable sheet 4b are heat-sealed in the thickness direction T, and the bottom part 5tB in a cylindrical shape in the thickness direction T. It includes a side wall 5tW that is erected so as to surround the surface sheet 2 and the liquid permeable sheet 4b. The bottom part 5tB of the heat-sealed part 5t has a high-density part having a material density higher than that of the surroundings by pressing and melting. The side wall part 5tW of the heat-sealing part 5t has a shape that widens toward the skin side from the bottom part 5tB. The non-heat-sealed part 5s depends on the distance between the adjacent heat-fused parts 5t and 5t, but the topsheet 2 and the absorber 4 are in the thickness direction due to the depression of the heat-fused parts 5t and 5t on both sides. T has a slightly depressed configuration. However, the non-thermal fusion part 5s may not be recessed.

  The heat-sealed portion 5t is configured by pressing the surface sheet 2 and the liquid-permeable sheet 4b of the absorber 4 in the thickness direction T and heat-sealing. Therefore, the heat-sealing part 5t does not contain pulp fibers. Moreover, although the heat sealing | fusion part 5t may contain the absorptive material 4a, the area | region of the heat sealing | fusion part in the absorptive material 4a is comprised so that a pulp fiber may not be included. Therefore, even in that case, the heat-sealing part 5t does not contain pulp fibers. Note that the heat-sealed portion 5t may include a superabsorbent polymer as the absorbent material 4a. Since the superabsorbent polymer is melted by heat at the time of hot embossing and can constitute a part of the heat fusion part, the adhesive strength of the heat fusion part is not lowered.

  On the other hand, the non-thermally fused portion 5s is configured by laminating the top sheet 2, the liquid permeable sheet 4b of the absorbent body 4, and the absorbent material 4a in the thickness direction T. Therefore, the non-heat-sealed part 5s does not include pulp fibers when the absorbent material 4a does not include pulp fibers such as the superabsorbent polymer 40 alone. On the other hand, when the absorbent material 4a includes pulp fibers such as the superabsorbent polymer 40 and pulp fibers, the non-heat-sealed portion 5s can include pulp fibers. In the present embodiment, from the viewpoint of heat fusion in heat embossing, the absorbent material 4a is only the superabsorbent polymer 40. Therefore, the non-thermally fused portion 5s does not include purple fibers as the absorbent material 4a. Contains superabsorbent polymer. Further, in the present embodiment, in the absorbent body 4, the basis weight of the superabsorbent polymer present in the non-thermally fused portion 5s is the basis weight of the superabsorbent polymer present in the region other than the non-thermally fused portion 5s. Higher than.

  In the present embodiment, the shape (or pattern) of the pair of other heat embossed portions 6 and 6 is a gentle arc shape (a gentle bow shape) that is concave with respect to the center line CW in the width direction in plan view. have. In other words, the shape is such that the distance between the pair of other heat embossed portions 6 and 6 is large (wider) in the vicinity of the center in the width direction W, and becomes smaller (narrows) toward both outer sides in the width direction W. Shape. The shape is arranged symmetrically with respect to the center line CW in the width direction and symmetrical with respect to the center line CL in the longitudinal direction. The pair of other heat embossed portions 6, 6 are extended to the vicinity of both end portions of the absorber 4 in the width direction W, and are extended to the vicinity of both end portions of the absorber 4 in the longitudinal direction L. The width of the other hot embossed part 5 is preferably 0.5 to 4 mm, more preferably 1 to 2 mm. However, the shapes of the pair of other heat embossed portions 6 and 6 are not limited to this example, and may have other shapes. Examples of other shapes of the pair of other heat embossed portions 6 and 6 include shapes that are parallel to the width direction W and shapes that are convex with respect to the width direction center line CW. Furthermore, you may have a pair of other heat | fever embossing part inside the longitudinal direction L of a pair of other heat | fever embossing parts 6 and 6. FIG.

  Each of the pair of other heat embossed portions 6, 6 includes a plurality of other heat fusion portions 6 t and a plurality of other non-heat fusion portions 6 s. Each of the plurality of other heat fusion portions 6 t is intermittently disposed along the width direction W in the other heat embossed portions 6. Each of the plurality of other non-heat-sealed parts 6s is arranged between the other heat-fused parts 6t, 6t adjacent to each other in the other heat-embossed part 6. In other words, in the other heat embossed portions 6, the other heat fusion portions 6 t and the other non-heat fusion portions 6 s are alternately arranged along the width direction W. In the present embodiment, the other heat-sealed portions 6t and the other non-heat-fused portions 6s are alternately formed in a gentle arc shape so as to be concave with respect to the center line CW in the width direction in plan view ( It is placed in a gentle bow.

  Other configurations of the other heat-sealed portion 6t and the other non-heat-fused portion 6s, such as specific shapes, structures, and materials, are the same as those of the heat-fused portion 5t and the non-heat-fused portion 5s, respectively. It is. Therefore, the description is omitted.

  As shown in FIG. 2, in the present embodiment, the light incontinence pad 1 further includes a pair of side gather sheets 7, 7, linear elastic members 8, 8, and a fixing portion 9. The pair of side gather sheets 7 and 7 are leakage prevention walls that are arranged so as to cover the surfaces on both sides in the width direction W of the top sheet 2 and extend in the longitudinal direction L. The pair of side gather sheets 7, 7 is folded so as to be able to stand upright on the surfaces on both sides in the width direction W of the top sheet 2, and the inner edges in the width direction W are free ends so as to form a gather portion. Yes. The linear elastic members 8 and 8 are linear elastic bodies that extend along the longitudinal direction L at the outer ends in the width direction W of the pair of side gather sheets 7 and 7. For example, two linear elastic members 8, 8 are arranged on each of the pair of side gather sheets 7, 7, for example, and contract the outer ends of the pair of side gather sheets 7, 7 in the width direction W. The fixing part 9 is an elongated rectangular adhesive tape attached along the longitudinal direction L to the non-skin side of the back sheet 3. In the present embodiment, three fixing portions 9 arranged in the width direction W at intervals are provided. The fixing part 9 fixes the light incontinence pad 1 to a packaging sheet (not shown) via a separator (not shown) when the light incontinence pad 1 is individually packaged, and the light incontinence pad 1 is used when the light incontinence pad 1 is used. Re-fix 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 produced by the following method, for example. First, the above-described absorbent material 4a (superabsorbent polymer) is disposed in a central region in the width direction W of the liquid-permeable sheet 4b to which an adhesive is applied. Next, the area | region adjacent to the both sides of the width direction W of the area | region where the absorbent material 4a is arrange | positioned is folded inside the width direction W along the fold line extended in the longitudinal direction L. FIG. Here, an adhesive is applied in advance to both ends in the width direction W of the folded liquid permeable sheet 4b. Therefore, the both end portions are pressed to bond the both end portions to each other. On the other hand, an adhesive is applied in advance to both ends in the longitudinal direction L of the region where the absorbent material 4a is disposed. Therefore, the both end portions are pressed to bond the both end portions to each other. Thus, the absorbent body 4 in which the absorbent material 4a is included in the liquid permeable sheet 4b is formed. 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 embossed portion in the liquid permeable sheet 4b is A method of relatively increasing the basis weight of the adhesive in the formed region can be taken. In that case, for example, the adhesive may be arranged in substantially the same shape as the shape of the heat embossed portion in plan view, or may be arranged in a rectangular shape or a band shape including the heat embossed portion.

  Next, a continuous sheet-like surface sheet is supplied to the conveyance belt. A hot melt adhesive is applied to one surface of the topsheet. The absorber 4 is pressed by the roll on the one surface of the top sheet. Thereby, the laminated body by which the absorber 4 and the surface sheet were laminated | stacked is formed. Next, the laminate is embossed while being heated by a pair of rolls of a pressing device (thermal embossing). Thereby, a pair of other heat including a pair of heat embossed portions 5 and 5 including a plurality of heat fusion portions 5t and a plurality of other heat fusion portions 6t described in FIGS. Embossed portions 6 and 6 are formed. Next, a continuous sheet-like back sheet is supplied to the conveyance belt. A hot melt adhesive is applied to one side of the back sheet. One side of the back sheet is pressed against the heat-embossed laminate with a roll. Thereby, the laminated body by which the surface sheet, the absorber 4, and the back surface sheet were laminated | stacked is formed. And the laminated body is cut | disconnected by the surrounding cutting device, and it isolate | separates into the shape of the light incontinence pad 1. FIG. Thereby, the light incontinence pad 1 (FIG. 1) is manufactured.

  However, the above manufacturing method is an example, and other known methods can be used.

  Next, the operation of the light incontinence pad 1 according to the present embodiment will be described. FIG. 3 is a schematic diagram for explaining the operation of the light incontinence pad 1. FIG. 3A shows a state in the heat embossed portion 5 at the initial stage of absorption of excrement by the absorber 4, for example, at the first absorption of excrement. FIG. 3B shows a state in the heat embossed part 5 when the excrement is absorbed by the absorbent body 4 after the case of FIG. 3A, for example, the second excretion absorption. FIG. 3C shows a state in the heat embossed portion 5 when the excrement is absorbed by the absorber 4 after the case of FIG. 3B, for example, the third excretion absorption. In addition, the number of excretion of the excrement (first time, second time, third time) is an example, and depending on the excretion amount at the time of one excretion, the number of times to become the state of FIG. 3 (a) to FIG. Can vary widely.

  In the light incontinence pad 1, the pair of heat embossed portions 5, 5 has a plurality of heat fusion portions 5 t positioned intermittently in the longitudinal direction L, and each heat fusion portion 5 t does not contain pulp fibers. As described above, the heat-sealed portion 5t is formed without including the pulp fiber that is an absorbent material that is difficult to be heat-sealed, that is, the surface sheet 2 made of heat-fusible fiber that is easily heat-sealed. It is formed of a liquid permeable sheet 4b. Therefore, the adhesive strength by the heat fusion part 5t can be strengthened, and the heat fusion part 5t can be hardly peeled off. Therefore, it is not necessary to form the heat fusion part continuously in a groove shape along the longitudinal direction L, and excrement can be widely diffused through the region between the plurality of intermittently formed heat fusion parts 5t. . Further, it is not necessary to widely dispose the heat fusion part on the light incontinence pad in order to increase the adhesive strength.

  Excrement (example: urine) is excreted near the center of the light incontinence pad 1 (excretion port contact area XA), and is considered to diffuse in the absorbent body 4 in the width direction W and the longitudinal direction L at approximately the same rate. . Therefore, the excrement first reaches the pair of heat embossed portions 5 and 5 in the width direction W. In this case, as shown in FIG. 3A, in the width direction W, the excrement F10 diffuses in the width direction W at the initial stage of the excretion absorption by the absorber 4, for example, the first excretion of the excretion F10. Can be blocked by the heat-sealed portion 5t. Then, the excreta F10 that is blocked can be guided to the region between the adjacent heat-sealed portions 5t and 5t where the superabsorbent polymer 40 exists, that is, the non-heat-fused portion 5s. Thereby, the excrement F10 can be circulated through the non-thermal fusion part 5s. And the excrement F10 which distribute | circulated the non-heat-fusion part 5s, ie, excrement F11, can be guide | induced to the absorber 4 of the outer side of the width direction W rather than a pair of heat embossing parts 5 and 5. Thereby, the excretion F11 can be absorbed by the outer absorbent body 4.

  As the excrement F11 circulates in the region between the adjacent heat fusion parts 5t and 5t where the superabsorbent polymer 40 exists, that is, the non-heat fusion part 5s, it exists in the non-heat fusion part 5s. The superabsorbent polymer 40 absorbs the excrement F11 and swells gradually. As a result, the superabsorbent polymer 40 eventually becomes a swollen superabsorbent polymer 40, and the superabsorbent polymer 40 closes the non-thermally fused portion 5s so that excrement becomes difficult to circulate. Therefore, as shown in FIG. 3 (b), when the excrement is absorbed by the absorber 4 after the case of FIG. 3 (a), for example, the second excretion F20 is absorbed, the excrement F20 includes a plurality of excrement F20. And the superabsorbent polymer 40 existing in the region between the adjacent heat fusion portions 5t and 5t, that is, the non-heat fusion portion 5s. As a result, the excrement F20 cannot be diffused outside the pair of heat embossed portions 5 and 5 in the width direction W. Thereby, excrement F20 can be diffused to the front and back of longitudinal direction L which has a margin for absorption (excretion F21). Further, it is possible to prevent the excrement F20 from diffusing excessively outward in the width direction W from the pair of heat embossed portions 5 and 5 and leaking to the outside in the width direction W.

  Thus, in the absorbent body, the excrement is initially guided mainly to the region in the width direction W, and then to the region mainly in the longitudinal direction L, that is, in the width direction W and the longitudinal direction L. It can be guided to a wide range and absorbed. Thereby, the absorber 4 can be efficiently used as a whole. As a result, for example, even when the amount of excreta is large, such as excretion multiple times, it is possible to prevent the excrement from being absorbed without being completely absorbed.

  In addition, if the swelling of the superabsorbent polymer 40 further proceeds (superabsorbent polymer 40), the heat-swelling part 5t may eventually be peeled off (heat-sealing part 5ta). For example, the surface sheet 2 may be peeled off from the absorber 4, or the bottom 5tB of the heat-sealing part 5t may be peeled off from the non-skin-side liquid-permeable sheet 4b. In such a state, as shown in FIG. 3 (c), excretion of excrement F30 by the absorber 4 after the case of FIG. 3 (b), for example, excretion of excrement F30 for the third time is excreted. The object F30 is blocked by the superabsorbent polymer 40 present in the non-thermally fused part 5s. And the excrement F30 blocked can be guided to the part where the heat fusion part 5ta is peeled off. Thereby, the excrement F30 can be circulated through the part where the heat-sealed part 5ta is peeled off. And the excrement F30 which distribute | circulated the part from which the heat-fusion part 5ta peeled, ie, the excrement F31, is diffused again to the absorber 4 of the width direction W outside a pair of heat embossing parts 5 and 5. it can. Thereby, even when the excrement is not absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened so that the excrement can flow into the area. It can absorb excrement. As the region of the absorbent body 4 where the excrement is not absorbed by the blockage of the superabsorbent polymer 40, the capacities of the excrement sufficiently absorbed because the blockage of the superabsorbent polymer 40 is too early. An area outside the heat embossed portion 5 in the width direction W can be mentioned. Therefore, excrement can be guided and absorbed over a wider range in the width direction W and the longitudinal direction L. Therefore, the absorber 4 can be used more efficiently as a whole.

  As a preferable aspect in the present embodiment, a pair of other heat embossed portions 6, 6 arranged at intervals in the longitudinal direction L is further provided. And a pair of other heat embossing parts 6 and 6 have a plurality of other heat fusion parts 6t and 6t located intermittently in the width direction W, and each other heat fusion part 6t contains pulp fiber. Not. Thus, the other heat-sealing part 6t is formed without the pulp fiber which is an absorptive material which is hard to be heat-sealed, that is, a surface sheet made of heat-fusible fiber that is easily heat-sealed. 2 and the liquid-permeable sheet 4b. Therefore, the adhesive strength by the other heat fusion part 6t can be strengthened, and the other heat fusion part 6t can be made difficult to peel off. Therefore, it is not necessary to continuously form other heat-sealed portions along the width direction W in the form of grooves, and excrement can be passed through a region between a plurality of other heat-sealed portions formed intermittently. Can diffuse widely. Further, it is not necessary to widely dispose another heat fusion part on the light incontinence pad in order to increase the adhesive strength.

  Moreover, in the longitudinal direction L, for example, when the excrement is absorbed by the absorbent body for the second time, excrement that diffuses in the longitudinal direction L is blocked by another heat-sealing portion 6t, and the excrement is adjacent to the excrement. It can guide | invade to the area | region between the other heat-fusion parts 6t and 6t. That is, excrement can be circulated in a region between other adjacent heat fusion parts 6t and 6t where the superabsorbent polymer 40 exists. And the excrement which distribute | circulated the area | region between other adjacent heat-fusion parts 6t and 6t can be guide | induced to the absorber 4 of the outer side of the longitudinal direction L rather than a pair of other heat embossing parts 6 and 6. FIG. Thereby, the excrement can be absorbed by the outer absorbent body 4.

  At that time, as excrement flows through the region between the other adjacent heat-sealed portions 6t and 6t, the superabsorbent polymer existing in the region between the other adjacent heat-fused portions 6t and 6t. 40 absorbs excrement and gradually swells, and eventually closes the region between the other adjacent heat-sealing parts 6t and 6t so that excrement becomes difficult to circulate. Therefore, at the time of subsequent absorption of excrement by the absorber, for example, absorption of excrement for the third time, excrement is transferred to a plurality of other heat fusion parts 6t and other adjacent heat fusion parts 6t, 6t. It is blocked by the superabsorbent polymer 40 existing in the region between them, and cannot be diffused outward in the longitudinal direction L from the pair of other heat embossed portions 6, 6. Thereby, excrement can be diffused in the both ends of the width direction W in the front and rear in the longitudinal direction L with sufficient margin for absorption. Further, it is possible to prevent the excrement from diffusing too far outward in the longitudinal direction L from the pair of other heat embossed portions 6 and 6 and leaking outside in the longitudinal direction L. Therefore, excrement can be absorbed over the entire width direction W and longitudinal direction L.

As a preferable aspect in the present embodiment, the distance between the adjacent heat fusion portions 5t and 5t in the plurality of heat fusion portions 5t (distance P shown in FIG. 3A) is 0.5 mm or more and 5 mm or less. Preferably, it is 1 mm or more and 3 mm or less. The basis weight of the superabsorbent polymer 40 between the adjacent heat fusion parts 5t and 5t is preferably 20 g / m ² or more and 80 g / m ² or less, more preferably 30 g / m ² or more and 50 g / m ² or less. preferable. Similarly, the distance between the other adjacent heat fusion portions 6t and 6t in the plurality of other heat fusion portions 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 the other adjacent heat-sealing parts 6t, 6t is preferably 20 g / m ² or more and 80 g / m ² or less, more preferably 30 g / m ² or more and 50 g / m ² or less. preferable.

As a result, excrement can be initially distributed between the adjacent heat fusion parts 5t and 5t (and other heat fusion parts 6t and 6t), and then excreted by the swollen superabsorbent polymer 40. You can block things. When it is less than 0.5 mm, or when it exceeds 80 g / m ² , blockage between adjacent heat fusion portions 5t and 5t (and other heat fusion portions 6t and 6t) due to expansion of the superabsorbent polymer 40. Stopping is too early, and it becomes difficult to sufficiently disperse excrement in a region outside in the width direction W (longitudinal direction L) of the pair of heat embossed portions 5 and 5 (a pair of other heat embossed portions 6 and 6). There is a fear. If it exceeds 5 mm or less than 20 g / m ² , the adjacent heat-sealed portions 5t and 5t (and other heat-fused portions 6t and 6t) cannot be sufficiently blocked, and excrement occurs. The pair of heat embossed portions 5 and 5 (a pair of other heat embossed portions 6 and 6) diffuses excessively outside the width direction W (longitudinal direction L) and diffuses in the longitudinal direction L (and width direction W). There is a risk that it will be difficult to perform, and there is a risk of leakage to the outside in the width direction W (and the longitudinal direction L).

  As a preferable aspect in the present embodiment, in the absorbent body 4, the basis weight of the superabsorbent polymer 40 existing in the region (non-thermally fused portion 5s) between the adjacent thermally fused portions 5t and 5t is other than that. It is preferable that the basis weight of the superabsorbent polymer 40 existing in the region is higher. Similarly, in the absorbent body 4, the basis weight of the superabsorbent polymer 40 existing in the region between the other adjacent heat fusion parts 6 t and 6 t (other non-heat fusion part 6 s) is the other region. It is preferable that the basis weight of the superabsorbent polymer 40 present in is higher. However, the basis weight comparison is performed with the maximum basis weight of each region.

  Therefore, when the excrement is blocked with the swollen superabsorbent polymer 40, the excrement can be blocked more reliably. Further, when the superabsorbent polymer 40 blocks the excrement and diffuses it in the longitudinal direction L (and the width direction W), and further absorbs the excrement and swells, the heat fusion part 5t ( The heat fusion part 6t) cannot withstand the swelling force, and eventually the heat fusion part 5t (and other heat fusion part 6t) is peeled off. Therefore, excrement can be diffused again in the width direction W (longitudinal direction L) through the heat-sealed portion 5t (other heat-fused portion 6t) that has been peeled off. Thereby, even when the excrement is absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened so that the excrement can flow into the area. The excrement can be absorbed in.

  In another embodiment, the region having a high basis weight of the superabsorbent polymer 40 includes, for example, the heat embossed portion 5 and has a long side parallel to the longitudinal direction L (for example, heat A rectangular region in which the embossed part 5 is inscribed) and other heat-embossed parts 6 are included and pseudo-similar to an elongated rectangle whose long side is parallel to the width direction W (example: other heat-embossed parts 6 are inscribed) Areas. Also in these cases, when excrement is blocked with the swollen superabsorbent polymer 40, excrement can be blocked more reliably.

  In another embodiment, in the absorbent body 4, as described above, the basis weight of the superabsorbent polymer 40 present in the other region is the basis weight of the superabsorbent polymer 40 present in the non-thermally fused portion 5 s. In addition to being higher, it is preferable that the following configuration is further provided. In the absorbent body 4, the outer side in the width direction W of each of the pair of heat embossed portions 5, 5 and the outer side in the width direction W of the region between the adjacent heat-fused portions 5t, 5t (non-heat-fused portion 5s). The basis weight of the superabsorbent polymer 40 existing in the region adjacent to the high-absorbent polymer 40 is high absorption existing in other regions excluding the region between the adjacent heat-fused portions 5t and 5t (non-heat-fused portion 5s). It is more preferable that the basis weight of the conductive polymer 40 is higher. And / or in the absorber 4, the area | region (other non-thermal fusion) of the other heat fusion parts 6t and 6t outside each longitudinal direction L of a pair of other heat embossing parts 6 and 6 and adjacent. The basis weight of the superabsorbent polymer 40 existing in the region adjacent to the outside in the longitudinal direction L of the bonding portion 6s) is the region between the other adjacent heat-bonding portions 6t and 6t (other non-heat-bonding portions). It is more preferable that the basis weight of the superabsorbent polymer 40 existing in the other region excluding 6s) is higher. Here, the region adjacent to the outside in the width direction W of the non-thermal fusion part 5 s is, for example, a region having a width approximately equal to the width of the non-thermal fusion part 5 s in the width direction W. Similarly, the region adjacent to the outside in the longitudinal direction L of the other non-thermal fusion part 6s is, for example, a region having a width comparable to the width of the other non-thermal fusion part 6s in the longitudinal direction L. In these cases, excrement can be blocked even more reliably by the superabsorbent polymer 40 swollen in each adjacent region.

  As a preferred mode in the present embodiment, as shown in FIG. 3A, the shape of the heat-sealed portion 5t in plan view is preferably rectangular. The rectangle is positioned such 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 1: 0.7 to 1: 1.3, and more preferably 1: 0.9 to 1: 1.1. The other heat fusion part 6t is the same as that of the heat fusion part 5t.

  Therefore, in the case of the heat-sealed portion 5t, the excrement that diffuses toward the outside in the width direction W is more accurately blocked by the surface that forms the first side Y1, that is, the surface that is substantially perpendicular to the width direction W. Can stop. In addition, the superabsorbent polymer that swells by absorbing excrement is sandwiched from both sides by the surface forming the second side X1, that is, the surface substantially along the width direction W so as not to move with excrement. Can be held. When the first side is too short, it is difficult to accurately block excrement that diffuses outward in the width direction. When the second side is too short, it becomes difficult to retain the superabsorbent polymer that swells by absorbing excrement. The case of the other heat fusion part 6t is the same as that of the heat fusion part 5t except that the functions in the first side Y1 in the width direction W and the second side X1 in the longitudinal direction L are switched.

As a preferable aspect in the present embodiment, the area of the heat-sealed portion 5t in a 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 other heat fusion part 6t is the same as that of the heat fusion part 5t.
Therefore, the excrement that the thermal fusion part 5t (and other thermal fusion part 6t) diffuses toward the outside in the width direction W (longitudinal direction L) can be accurately blocked, and the excrement can be blocked. The superabsorbent polymer 40 that has been absorbed and swollen can be held so as not to move with excrement. If it is less than 0.5 mm ² , it may be difficult to accurately block excreta. If it exceeds 5 mm ² , it may be difficult to retain the superabsorbent polymer.

As a preferable aspect in the present embodiment, the adhesive strength of the heat fusion part 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 heat fusion part 6t is the same as that of the heat fusion part 5t.
Therefore, in the initial swelling of the superabsorbent polymer 40, the heat fusion part 5t (and other heat fusion part 6t) does not peel off, and the adjacent heat fusion parts 5t and 5t (other heat fusion parts). 6t, 6t), the excrement that the swollen superabsorbent polymer 40 tries to diffuse in the width direction W (and the longitudinal direction L) can be blocked. Thereby, excrement can be diffused in the longitudinal direction L (and the width direction W). Further, when the superabsorbent polymer 40 swells to some extent, it cannot endure the swelling force, and eventually the heat fusion part 5t (or another heat fusion part 6t) is peeled off. Thereby, excrement can be diffused again in the width direction W (and the longitudinal direction L) via the heat fusion part 5t (and other heat fusion part 6t). Thereby, even when the excrement is absorbed by the blocking of the superabsorbent polymer 40, the blocking is weakened so that the excrement can flow into the area. The excrement can be absorbed in. When the adhesive strength is less than 0.05 N, the heat-sealed portion 5t (and other heat-fused portion 6t) may be peeled off when being attached. When the adhesive strength exceeds 1 N, when the superabsorbent polymer 40 swells to some extent, the heat-sealed portion 5t (and other heat-fused portion 6t) may not be peeled off.

  As a preferable aspect in the present embodiment, a surface (a surface substantially perpendicular to the width direction W) facing the inner side in the width direction W of the heat-sealed portion 5t is a plane along the longitudinal direction L or inside the width direction W. It is preferably a concave curved surface. Similarly, the surface (the surface substantially perpendicular to the longitudinal direction L) facing the inner side in the longitudinal direction L of the other heat-sealing part 6t is a plane along the width direction W or a curved surface that is concave on the inner side of the longitudinal direction L. Preferably there is.

  A surface facing the inner side in the width direction W in the heat-sealed portion 5t (a surface substantially perpendicular to the width direction W) is a plane along the longitudinal direction L, that is, a plane toward the center side of the light incontinence pad 1, or the width direction. A curved surface that is concave inside W, that is, a curved surface that is concave with respect to the center side of the light incontinence pad 1. Thereby, the excrement which is going to diffuse to the outside of the width direction W can be blocked more reliably. Similarly, the surface (the surface substantially perpendicular to the longitudinal direction L) facing the inner side in the longitudinal direction L of the other heat-sealed portion 6t is directed to the plane along the width direction W, that is, the center side of the light incontinence pad 1. It is a flat surface or a concave curved surface inside the longitudinal direction L, that is, a curved surface concave to the center side of the light incontinence pad 1. Thereby, the excrement which is going to diffuse to the outside of longitudinal direction L can be blocked more certainly.

  As a preferable aspect in the present embodiment, a surface facing the longitudinal direction L (a surface substantially perpendicular to the longitudinal direction L) in the heat-sealing part 5t is preferably a plane along the width direction W. Similarly, the surface (surface substantially perpendicular to the width direction W) facing the width direction W in the other heat-sealing part 6t is preferably a plane along the longitudinal direction L.

  That is, the surface of the heat-sealing portion 5t facing the longitudinal direction L (surface substantially perpendicular to the longitudinal direction L), that is, the surfaces facing each other in the adjacent heat-sealing portions 5t and 5t are planes along the width direction W. is there. Therefore, it is possible to more reliably hold the superabsorbent polymer 40 that absorbs excrement and swells between surfaces facing each other. Similarly, the surface in the width direction W (surface substantially perpendicular to the width direction W) in the other heat-sealed portion 6t, that is, the surfaces facing each other in the adjacent heat-bonded portions 6t and 6t are in the longitudinal direction. A plane along L. Therefore, the superabsorbent polymer 40 that absorbs excrement and swells can be more reliably held between the surfaces facing each other.

FIG. 4 is a plan view showing the configuration of the absorber 4.
As a preferable aspect in the present embodiment, the length E1L in the longitudinal direction L in each of the pair of heat embossed portions 5 and 5 is 30% or more, 80 if the length AL in the longitudinal direction L of the absorber 4 is 100%. % Or less is preferable, and 40% or more and 70% or less are more preferable. Thereby, the diffusion of the excrement in the width direction W can be more reliably blocked by the heat fusion part 5t and guided to the region between the adjacent heat fusion parts 5t and 5t. In the case of less than 30%, the excrement is other than the pair of heat embossed portions 5 and 5 in the absorbent body 4 even if the space between the adjacent heat fusion portions 5t and 5t is blocked by the expansion of the superabsorbent polymer 40. In some places, it is easy to diffuse outward in the width direction W, and it may be difficult to diffuse in the longitudinal direction L. If it exceeds 80%, the excrement may be difficult to diffuse to the regions at both ends in the longitudinal direction L outside the width direction W of the pair of heat embossed portions 5 and 5 in the absorber 4.

  As a preferable aspect in the present embodiment, the distance E1Wa in the width direction W between the center portions in the longitudinal direction L in the pair of heat embossed portions 5 and 5 is the distance E1Wb in the width direction W between the end portions in the longitudinal direction L. Shorter than that. That is, the pair of heat embossed portions 5 and 5 has a shape in which the central portion in the longitudinal direction L is narrowed inward. Therefore, the area of the region inside the pair of heat embossed portions 5, 5 can be relatively narrowed at the center portion in the longitudinal direction L, and the region inside the pair of heat embossed portions 5, 5 can be formed at the end portion in the longitudinal direction L The area of the region can be made relatively wide. In other words, the amount of excreta that can be absorbed at the center in the longitudinal direction L of the absorbent body 4 can be relatively reduced, and the amount of excreta that can be absorbed at the end in the longitudinal direction L can be relatively increased. Here, the central portion in the longitudinal direction substantially corresponds to the excretory opening contact area. Therefore, the excreted excreted matter can hardly stay in the central portion, and can be easily diffused toward the end portion in the longitudinal direction L. However, the distance between the center portions in the longitudinal direction L of the pair of heat embossed portions 5 and 5 is 30% or more and 70%, where the width in the width direction W of the center portion in the longitudinal direction L of the absorber 4 is 100%. The following is preferable, and 40% or more and 60% or less are more preferable. The distance between the ends in the longitudinal direction L of the pair of heat embossed portions 5 and 5 is 35% or more and 95%, where the width in the width direction W of the end in the longitudinal direction L of the absorber 4 is 100%. The following is preferable, and 45% or more and 85% or less are more preferable.

  As a preferable aspect in the present embodiment, the length E2W in the width direction W of each of the pair of other heat embossed portions 6 and 6 is 10% or more, where the length AW in the width direction W of the absorber 4 is 100%. 70% or less, more preferably 20% or more and 60% or less. Thereby, the diffusion of the excrement in the longitudinal direction L is more reliably blocked by the other heat-sealed portion 6t and guided to the region between the other adjacent heat-fused portions 6t and 6t. Can do. If the amount is less than 10%, the excrement may be excessively diffused to a region outside the longitudinal direction L with respect to the pair of other heat embossed portions 6 and 6 in the absorbent body 4 and leak to the outside in the longitudinal direction L. When it exceeds 70%, the excrement becomes difficult to diffuse to the region outside the longitudinal direction L of the pair of other heat embossed portions 6 and 6 in the absorbent body 4 and in the vicinity of both end portions in the width direction W. The body 4 may not be used efficiently.

  As a preferable aspect in the present embodiment, in the pair of other heat embossed portions 6 and 6, the distance E2Wa in the longitudinal direction L between the central portions in the width direction W is the distance in the longitudinal direction L between the end portions in the width direction W. It is preferably longer than E2Wb. That is, the pair of other heat embossed portions 6, 6 has a shape in which the central portion in the width direction W bulges outward. Therefore, in the center part of the width direction W, the area inside a pair of other heat embossing parts 6 and 6 can be expanded. In other words, it is possible to increase the amount of excreta that can be absorbed in the central portion of the absorbent body in the width direction W. Therefore, the excreted excreted matter can be more easily diffused to the end portion in the longitudinal direction L. However, the distance in the longitudinal direction L between the central portions in the width direction W of the pair of other heat embossed portions 6 and 6 is 100% of the length in the longitudinal direction L of the central portion in the width direction W of the absorber 4. 35% or more and 85% or less are preferable, and 45% or more and 80% or less are more preferable. Moreover, the distance of the longitudinal direction L between the edge parts of the width direction W in a pair of other heat embossing parts 6 and 6 makes the length of the longitudinal direction L of the edge part of the width direction W of the absorber 4 100%. 30% or more and 80% or less is preferable, and 40% or more and 75% or less is more preferable.

  In the example of FIG. 2, the heat fusion part 5t includes a bottom part 5tB and a side wall part 5tW. However, in another embodiment, the heat fusion part 5t may include a bottom part and a peripheral wall part (not shown). The bottom is a high-density portion in which the top sheet 2 and at least the liquid-permeable sheet 4b are heat-sealed in the thickness direction T. The bottom and the bottom 5tB in FIG. 2 are the same. The peripheral wall portion is a wall portion that is erected so as to surround the bottom portion in a cylindrical shape in the thickness direction T, and the top sheet 2 and at least the liquid permeable sheet 4b are heat-sealed in the thickness direction T. The height in the thickness direction of the peripheral wall portion is, for example, about twice the thickness of the bottom portion or about 1/3 of the thickness of the absorber 4 (the remaining portion is the side wall portion). The peripheral wall portion and the side wall portion 5tW in FIG. 2 are different from each other in that the peripheral wall portion is formed by thermal fusion in the same manner as the bottom portion. That is, the peripheral wall portion is formed by the surface sheet 2 and at least the liquid permeable sheet 4b being cooled and solidified after being melted by heat, whereas the side wall portion 5tW in FIG. The sheet 4b is laminated without being melted. Such a peripheral wall portion has a relatively large amount of energy to be supplied at the time of hot embossing (e.g., increase the heating temperature, lengthen the heating / squeezing time, use an ultrasonic horn during pressing). Can be formed. When the thermal fusion part 5t has a peripheral wall part, the peripheral wall part is less likely to be deformed than the thermal fusion part 5t having the side wall part 5tW in FIG. It can hold | maintain between the heat fusion parts 5t and 5t which fit. Similarly, the other heat fusion part 6t may include a bottom part and a peripheral wall part.

<Distance between heat-sealed parts>
The distance between the heat fusion parts was measured by the following method. (1) A light incontinence pad was cut into a size of 20 × 40 mm with the measurement target region as the center to prepare a sample. (2) The sample was scanned 360 degrees using an X-ray fluoroscope FLEX-M863 (manufactured by Beamsense Co., Ltd.). Specifically, every time the sample is rotated 0.2 degrees, a fluoroscopic image is taken to obtain 360 degrees, that is, 1800 fluoroscopic images, and the obtained 1800 fluoroscopic images are connected. Together, a 3D image was created. (3) A cross-sectional view including the edge of the measurement target was extracted from the 3D image, and the distance between the edges of the heat-sealed portion was measured from the extracted cross-sectional view to obtain the distance between the heat-fused portions.
<Basis weight of superabsorbent polymer>
The basis weight of the superabsorbent polymer was measured by the following method. (1) The dimension in plan view of the measurement target region in the light incontinence pad was measured to determine the area of the measurement target region. (2) A region to be measured was cut out from a light incontinence pad and used as a sample. (3) Only the superabsorbent polymer was carefully taken out of the sample, and the mass of the superabsorbent polymer taken out was measured. (4) The mass of the superabsorbent polymer taken out was divided by the area of the measurement target region to calculate the basis weight. (5) The value obtained by averaging the basis weights of the three samples was defined as the basis weight of the superabsorbent polymer.
<Adhesive strength test>
The adhesive strength of the heat fusion part was measured by the following method. (1) From the light incontinence pad, the laminate of the surface sheet and the absorber was taken out and cut into a width of 25 mm to prepare a sample. At that time, the skin-side liquid-permeable sheet and the non-skin-side liquid-permeable sheet were cut so as to be separated. (2) End portions in the longitudinal direction of the surface sheet of the sample and the liquid-permeable sheet on the non-skin side were sandwiched between chucks of a tensile tester (distance between chucks: 10 mm). (3) Using a tensile tester, the surface sheet and the non-skin-side liquid-permeable sheet were pulled so as to peel in a 180 ° direction, and the load value was measured. (4) The maximum value of the measured load value was defined as the joint strength (N / 25 mm).

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to such examples.

(1) Sample As a sample of Example 1, a light incontinence pad according to the embodiment shown in FIGS. As a sample of Comparative Example 1, the heat embossed part is the same as Example 1 except that the heat-embossed part is not a plurality of intermittently formed heat-fused parts, but has a continuous heat-fused part. A light incontinence pad was made.
However, in the sample of Example 1, the distance between adjacent heat fusion parts at that time is 2.4 mm, and the basis weight of the superabsorbent polymer between adjacent heat fusion parts is 40 g / m ^2. The distance between other adjacent heat-sealed portions and the basis weight of the superabsorbent polymer in the area were also the same. The shape in plan view in each of the heat fusion part and the other heat fusion part is a square, and therefore the ratio of the first side to the second side is 1: 1. The area of each of the heat-sealed portions in plan view was 1 mm ² . The length in the longitudinal direction of each of the pair of heat embossed portions was 60% of the length in the longitudinal direction of the absorber. In the pair of heat embossed portions, the distance in the width direction between the central portions in the longitudinal direction is 50% of the width of the absorber, and the distance in the width direction between the end portions in the longitudinal direction is 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 center portions in the width direction of 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 end portions in the width direction is The length of the absorber 4 was 75%. Further, in the absorbent body, the basis weight of the superabsorbent polymer present in the region between the adjacent heat-sealed portions was relatively higher than the basis weight of the superabsorbent polymer present in the other region. .

(2) Method for evaluating absorption performance 3 cc of physiological saline in the center of the sample (the portion where the longitudinal centerline CL and the widthwise centerline CW in FIG. 1 intersect) is given every 30 seconds. , Dropped from a height of 30 cm. And every time when the physiological saline is dropped, the time from when the physiological saline reaches the surface of the surface sheet at the center of the sample until the physiological saline runs out from the surface of the surface sheet, that is, the absorption of the physiological saline. The time required (hereinafter referred to as “absorption time”) was measured.

(3) Evaluation results Table 1 shows the evaluation results of the absorption performance. As shown in Table 1, in the sample of Example 1, the absorption time hardly changed from the first drop to at least the fifth drop. 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 was 1.0 times in the first time and hardly changed, but 1.2 times in the second time. The third time was 2.2 times, the fourth time was 4.3 times, and the fifth time was 7.0 times. That is, in the sample of Example 1, the absorption performance hardly changed regardless of the number of times, but in the sample of Comparative Example 1, it was found that the absorption performance deteriorates as the number of times increased. This is presumably because the sample of Example 1 has a plurality of heat-sealed portions formed intermittently instead of the heat-fused portions in which the heat-embossed portions are continuously formed in a groove shape. In addition, the adhesive strengths of the heat fusion part and the other heat fusion part were both 0.1 to 0.3 N / 25 mm, which was a value with no problem in use.

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

1 Light incontinence pad (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Thermal embossed part 5t Thermal 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 located on the non-skin side of the topsheet,
The absorber includes a superabsorbent polymer and a heat-fusible fiber,
The absorbent article has a pair of heat embossed portions arranged at intervals in the width direction,
Each of the pair of hot embossed portions is
Extending along the longitudinal direction, and recessed in the thickness direction from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber,
Including a plurality of heat fusion portions intermittently positioned along the longitudinal direction;
The plurality of heat fusion portions do not include pulp fibers,
The superabsorbent polymer is present in at least a region between the heat fusion portions adjacent in the longitudinal direction among the plurality of heat fusion portions.
Absorbent article. The distance between adjacent heat fusion parts in the plurality of heat fusion parts is 0.5 mm or more and 5 mm or less, and the basis weight of the superabsorbent polymer between the adjacent heat fusion parts is 20 g / m ² or more and 80 g / m ² or less,
The absorbent article according to claim 1. 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 absorbent article according to claim 1 or 2. In the pair of heat embossed portions, the distance in the width direction between the center portions in the longitudinal direction is shorter than the distance in the width direction between the end portions in the longitudinal direction.
The absorbent article as described in any one of Claims 1 thru | or 3. A pair of other heat embossed portions arranged at intervals in the longitudinal direction;
Each of the pair of other heat embossed portions is
Extending along the width direction, and recessed in the thickness direction from the skin-side surface of the topsheet toward the non-skin-side surface of the absorber,
Including a plurality of other heat-sealed portions positioned intermittently along the width direction,
The plurality of other heat fusion parts do not include pulp fibers,
The superabsorbent polymer exists at least in a region between other heat fusion portions adjacent in the width direction among the plurality of other heat fusion portions.
The absorbent article as described in any one of Claims 1 thru | or 4. The length in the width direction in each of the pair of other heat embossed portions is not less than 10% and not more than 70% of the length in the width direction of the absorber.
The absorbent article according to claim 5. In the pair of other heat embossed portions, the distance in the longitudinal direction between the central portions in the width direction is longer than the distance in the longitudinal direction between the end portions in the width direction.
The absorbent article according to claim 5 or 6. In the absorbent body, the basis weight of the superabsorbent polymer present in a region between adjacent heat-sealed portions is higher than the basis weight of the superabsorbent polymer present in other regions.
The absorbent article as described in any one of Claims 1 thru | or 7. 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,
The ratio of the first side to the second side is 1: 0.7 to 1: 1.3.
The absorbent article as described in any one of Claims 1 thru | or 8. The 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 as described in any one of Claims 1 thru | or 9. The adhesive strength of the heat fusion part is 0.05 N / 25 mm or more and 1 N / 25 mm or less.
The absorbent article as described in any one of Claims 1 thru | or 10. The surface facing the inner side in the width direction in the heat fusion part is a flat surface along the longitudinal direction, or a concave curved surface on the inner side in the width direction.
The absorbent article as described in any one of Claims 1 thru | or 11. The surface facing the longitudinal direction in the heat fusion part is a plane along the width direction.
The absorbent article as described in any one of Claims 1 thru | or 12.

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