JP2021130045A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which is thin and has excellent absorption performance, fitness and wear feelings.SOLUTION: In an absorbent article 1 having an absorbent sheet 20, the absorbent sheet 20 has three nonwoven sheets 21 and high absorbent polymer layers 22 supporting high absorbent polymer between the respective nonwoven sheets 21. A high absorbent polymer layer 221 of the first layer and a high absorbent polymer layer 222 of a second layer in the absorbent sheet 201 positioned above have along a longitudinal direction a high absorbent polymer center non-laminate part 23 where there is no high absorbent polymer in a center part in a width direction. A high absorbent polymer layer 223 of the first layer and a high absorbent polymer layer 224 of a second layer in the absorbent sheet 202 positioned below have high absorbent polymer both sides non-laminate part 24 where there is no high absorbent polymer along a longitudinal direction on both sides of the central line in the width direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to an absorbent article such as a soft incontinence pad.

With the aging of society and growing health consciousness, the number of active elderly people is expected to increase in recent years. Most of the absorbent articles such as light incontinence pads and liners used by the elderly can absorb a relatively large amount of body fluid, and the thickness of the absorbent articles must be increased accordingly. I don't get it. However, when such a thick absorbent article is worn, there is a possibility that a problem may occur when used by an active elderly group, such as causing a sense of discomfort during the activities of the elderly. ..

Reflecting such a situation, in recent years, absorbent articles having a reduced thickness and improved fit have been put on the market. Here, in order to reduce the thickness of the absorbent article, a highly absorbent polymer sheet (SAP sheet) containing a highly absorbent polymer (SAP) as an absorber is often used. When using a SAP sheet, if the SAP is evenly distributed on a non-woven fabric or the like, gel blocking may occur due to the highly absorbent polymer that has swollen by absorbing body fluids, which may impair the absorption performance and the rigidity of the SAP sheet. The high height may impair the fit of the absorbent article. Further, when the SAP sheet is used, if it is distributed in a streak pattern or the like, a large number of irregularities may be generated by the SAP that absorbs the body fluid and swells, and the wearing feeling may be impaired.

In this respect, in the case of an absorbent article having a region in the longitudinal direction in which a highly absorbent polymer does not exist near both ends in the width direction of the SAP sheet, the fit in the width direction of the absorbent article is improved (Patent Documents). 1). However, in the widthwise center of the absorbent article, which is the urination region, the highly absorbent polymer that absorbs and swells the body fluid impairs the longitudinal fit of the absorbent article, and the widthwise center of the absorbent article. The fit is impaired at the part.

Japanese Patent No. 5709996

However, in the case of an absorbent article having a region in the center of the SAP sheet in the width direction in which the highly absorbent polymer does not exist along the longitudinal direction, the fit in the longitudinal direction and the width direction of the absorbent article is improved, and the absorbency is improved. Wearability is also improved at the center of the article in the width direction, but there is no region for absorbing body fluid, and the absorption performance is impaired.

Therefore, an object of the present invention is to provide an absorbent article having a thin absorbent article and good absorption performance, fit, and fit.

In view of the above problems, the present inventors have conducted diligent research. As a result, in the absorbent article having the absorbent sheet, the absorbent sheet has three non-woven fabric sheets and a high-absorbent polymer layer in which a high-absorbent polymer is supported between the respective non-woven fabric sheets, and is on the uppermost side. The first layer of the highly absorbent polymer layer, which is the uppermost layer of the absorbent sheet located at, absorbs the highly absorbent polymer center non-woven fabric in the widthwise center of the absorbent sheet in the absence of the highly absorbent polymer. The second layer of the highly absorbent polymer layer, which is the lowest layer of the absorbent sheet located along the longitudinal direction of the sheet and is located at the lowermost side, is all or one of the width directions of the highly absorbent polymer center non-woven fabric. It has been found that the above-mentioned problems can be solved by the presence of the highly absorbent polymer along the longitudinal direction of the absorbent sheet in the portion, and the present invention has been completed. Specifically, the present invention provides the following.
(1) The first aspect of the present invention is to provide a liquid-permeable top sheet, a liquid-impermeable back sheet, and one or more absorbent sheets arranged between the top sheet and the back sheet. The absorbent article has, and the absorbent sheet has three non-woven sheets and a high-absorbent polymer layer in which a high-absorbent polymer is supported between the three non-woven sheets, and is located on the uppermost side. The first layer of the highly absorbent polymer layer, which is the uppermost layer of the absorbent sheet, has a highly absorbent polymer center non-laminated portion in the widthwise center of the absorbent sheet, which is the absorbent sheet. The second layer of the highly absorbent polymer layer, which is the lowermost layer of the absorbent sheet located along the longitudinal direction of the highly absorbent polymer, is at least the center line in the width direction of the highly absorbent polymer center non-laminated portion. In the region containing, a highly absorbent polymer is present along the longitudinal direction of the absorbent sheet, the absorbent article has two absorbent sheets on the upper side and the lower side, and the absorbent sheet is located on the lower side. The highly absorbent polymer layer of the first layer, which is the upper layer in the above, has a highly absorbent polymer center non-laminated portion in the widthwise center portion of the absorbent sheet along the longitudinal direction of the absorbent sheet. On both sides of the widthwise centerline of the absorbent sheet, non-laminated portions on both sides of the highly absorbent polymer in which the highly absorbent polymer is absent are provided along the longitudinal direction of the absorbent sheet, and the absorbent is located on the lower side. The second layer of the highly absorbent polymer layer, which is the lowest layer in the sheet, is a non-laminated portion on both sides of the highly absorbent polymer in which the highly absorbent polymer is not present on both sides of the widthwise center line of the absorbent sheet located on the lower side. Along the longitudinal direction of the absorbent sheet located on the lower side, and the height of the second layer, which is the lower layer of the highly absorbent polymer layer of the first layer, which is the uppermost layer of the absorbent sheet located on the upper side. The absorbent polymer layer is an absorbent article having a highly absorbent polymer center non-laminated portion in the widthwise center portion of the absorbent sheet along the longitudinal direction of the absorbent sheet. Is.

According to the present invention, in the absorbent article, the highly absorbent polymer is present in the highly absorbent polymer layer of the first layer, which is the uppermost layer of the absorbent sheet located on the uppermost side, at the center in the width direction of the absorbent sheet. It has a highly absorbent polymer central non-laminated portion along the longitudinal direction of the absorbent sheet. Therefore, the thickness of the absorbent article is thin, and the absorbent article has good absorption performance with less gel blocking at the center of the absorbent sheet in the width direction, which is the urination region. And, the fit in the longitudinal direction and the width direction of the absorbent sheet is also good, and even if the highly absorbent polymer in the center of the absorbent sheet in the width direction swells, it is hard to press the body and the wearing feeling is also good. Become. Further, according to the present invention, the absorbent article is formed on the highly absorbent polymer layer of the second layer, which is the lowest layer of the absorbent sheet located at the lowermost side, in the entire width direction of the highly absorbent polymer center non-laminated portion. Alternatively, a highly absorbent polymer is present in part along the longitudinal direction of the absorbent sheet. Therefore, in the central portion of the absorbent sheet in the width direction, which is the urination region, it is possible to obtain an absorbent article having good absorption performance that prevents gel blocking and also prevents leakage of body fluid.

The absorbent article according to the first embodiment of the present invention, (a) a top plan view showing the appearance of the absorbent article of the present invention, (b) and (c) are schematic cross-sectional views of AA in (a). The figure is shown. The absorbent article according to the second embodiment of the present invention, (a) a top plan view showing the appearance of the absorbent article, (b) to (d) are schematic cross-sectional views taken along the line BB of (a). An example is shown for each.

The embodiments of the present invention will be described in detail below, but these are listed for the purpose of exemplification and do not limit the present invention.

Hereinafter, the absorbent article 1 according to the embodiment of the present invention will be described in detail for each embodiment with reference to the drawings. In the description of this embodiment, the same elements are designated by the same reference numerals throughout. In the following description in the present specification, the body fluid refers to a liquid excreted from the body such as urine, blood, and water in loose stool. Further, the term “when the absorbent article 1 is worn” means at least one of the time when the absorbent article 1 is worn and the time after the absorbent article 1 is worn. In the description of the present specification, the longitudinal direction of the absorbent article 1 is the direction extending in front of and behind the wearer when the absorbent article 1 is worn, and the width direction of the absorbent article 1 is the longitudinal direction. The direction is lateral or orthogonal to the direction. Further, in the present specification, the upper or upper layer of each configuration of the absorbent article 1 refers to the side or layer arranged on the side that comes into contact with the wearer when the absorbent article 1 is worn, and the lower or lower layer means. Refers to a side or layer arranged on the side that comes into contact with the wearer's clothing when the absorbent article 1 is worn, rather than the corresponding upper or upper layer.

[First Embodiment]
FIG. 1 is a plan top view and a cross-sectional view of the absorbent article 1 according to the first embodiment of the present invention.

<Absorbable article>
The absorbent article 1 according to the first embodiment of the present invention includes a liquid-permeable top sheet 10, a liquid-impermeable back sheet 30, and one or more sheets arranged between the top sheet 10 and the back sheet 30. It has an absorbent sheet 20 and.

(Top sheet)
The top sheet 10 allows body fluids to quickly pass toward the absorbent sheet 20, and is arranged so as to face the back sheet 30 with the absorbent sheet 20 interposed therebetween. Since the top sheet 10 is a sheet that comes into contact with the skin, it has a soft feel and does not irritate the skin. For example, a non-woven fabric such as a thermal bond non-woven fabric typified by an air-through non-woven fabric, a thermal bond / span It is formed from a material such as a composite non-woven fabric in which bonds are laminated, an open film such as an opening polyethylene film, a foam film such as polyethylene foam or urethane foam, or a composite sheet in which these are laminated. The top sheet 10 may be a single layer or a plurality of layers may be laminated, and a large number of through holes may be formed in order to impart dry touch.

As the non-woven fabric, synthetic fibers such as polyethylene and polypropylene, recycled fibers such as rayon, and natural fibers such as cotton were used, and obtained by a known processing method such as a spunlace method or a spunbond method in addition to the thermal bond method. Can also be used. From the viewpoint of workability and strength, the basis weight of the top sheet 10 ^{is preferably 15 g / m 2} or more and 50 g / m ² or less. Lotions, antioxidants, anti-inflammatory components, pH regulators, antibacterial agents, moisturizers and the like may be applied to the top sheet 10 in order to reduce irritation to the skin. The top sheet 10 may have an hourglass shape, a substantially rectangular shape, or the like having a constriction in the center in the longitudinal direction in which the wearer's crotch is positioned, and is slightly outside the side edge of the absorbent sheet 20. It may be provided extending to.

(Back sheet)
For the back sheet 30, a sheet material having liquid impermeableness and water impermeability is used so that body fluid does not leak to the outside of the absorbent article 1, but even if the back sheet 30 has moisture permeability to prevent stuffiness. good. Examples of the material of the back sheet 30 having such characteristics include a thin plastic sheet such as a polyethylene sheet or a polyethylene laminated non-woven fabric. The back sheet 30 may have an hourglass shape, a substantially rectangular shape, or the like having a constriction in the center in the longitudinal direction in which the wearer's crotch is positioned, and may be slightly outward from the side edge of the absorbent sheet 20. It may be extended. The lower surface of the back sheet 30 may be provided with an adhesive layer for fixing the absorbent article 1 to the underwear or the like when worn. When the absorbent article 1 has an adhesive layer, the center of the highly absorbent polymer non-laminated portion 23 and the center of the absorbent sheet 20 in the width direction in which the highly absorbent polymer does not exist in the center of the absorbent sheet 20 in the width direction, which will be described later. If the pressure-sensitive adhesive layer is provided at a position where the non-laminated portions 24 on both sides of the high-absorbent polymer, which do not have the high-absorbent polymer on both sides of the wire, overlap each other in the thickness direction, deformation of the absorbent sheet 20 can be suppressed during wearing. Further, the pressure-sensitive adhesive layer may be provided by removing this position.

A release sheet may be provided to protect the pressure-sensitive adhesive layer, and the release sheet may be integrated with the packaging sheet of the absorbent article 1. The top sheet 10 and the back sheet 30 form flaps that are fixed by a hot melt adhesive, a heat seal, or the like without sandwiching the absorbent sheet 20 at at least a part of the end portion such as the longitudinal end portion. May be good.

(Absorbable sheet)
The absorbent sheet 20 has three non-woven fabric sheets 21 and a highly absorbent polymer layer 22 in which a highly absorbent polymer is supported between the respective non-woven fabric sheets 21, and one or more sheets per absorbent article 1. The absorbent sheet 20 of the above is provided.

As the non-woven fabric sheet 21 that can be used for the absorbent sheet 20 of the present invention, a non-woven fabric similar to the non-woven fabric conventionally used for manufacturing the absorbent sheet 20 can be used. Specifically, the air-laid non-woven fabric is used. , Air-through non-woven fabric, spunbonded non-woven fabric, melt-blown non-woven fabric, thermal-bonded non-woven fabric, and the like, any hydrophilic non-woven fabric or hydrophobic non-woven fabric manufactured by a conventionally known manufacturing method can be mentioned.

The basis weight of the non-woven fabric used for the non-woven fabric sheet 21 ^{is preferably 10 g / m 2} or more and 50 g / m ² or less, and more preferably 15 g / m ² or more and 45 g / m ² or less. By setting the basis weight of the non-woven fabric within the above range, the thickness of the absorbent sheet 20 can be sufficiently reduced.

The highly absorbent polymer (hereinafter, also referred to as SAP) of the highly absorbent polymer layer 22 in the absorbent sheet 20 is not particularly limited as long as it can absorb body fluids and prevent backflow, and is sodium polyacrylate. Formed from materials such as systems, polyasparaginate systems, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers and saponified products thereof. Can be used. Among these, sodium polyacrylate is preferable from the viewpoint of the amount of absorption per weight.

The amount of the highly absorbent polymer in the ^{entire absorbent sheet 20 is preferably 30 g / m 2} or more and 500 g / m ² or less in basis weight, and is 10% by mass or more and 90% by mass with respect to the weight of the entire absorbent sheet 20. The content is preferably mass% or less.

The highly absorbent polymer layer 22 is formed by distributing the highly absorbent polymer on a non-woven fabric coated with an adhesive. The adhesive is not particularly limited, but a hot melt adhesive is preferable. The method of applying the adhesive is not particularly limited, but it is preferably applied by slot coating or spray coating.

((Highly absorbent polymer center non-laminated part))
As shown in FIGS. 1A to 1B, the absorbent article 1 has one or more absorbent sheets 20, and is the first layer which is the uppermost layer of the absorbent sheet 20 located on the uppermost side. The highly absorbent polymer layer 221 of the above has a highly absorbent polymer center non-laminated portion 23 in the widthwise central portion of the absorbent sheet 20 along the longitudinal direction of the absorbent sheet 20. There is.

As a result, since the highly absorbent polymer does not exist in the longitudinal direction in the widthwise center of the absorbent sheet 20, gel blocking can be reduced in the widthwise center of the absorbent sheet 20 which is the urination region. , The absorption performance becomes good. Further, by providing the highly absorbent polymer center non-laminated portion 23 in the longitudinal direction at the center portion in the width direction of the absorbent sheet 20, the flexibility in the longitudinal direction and the width direction of the absorbent sheet 20 is improved, and the fit is improved. It will be good. Also. In the high-absorbent polymer layer 221 of the first layer, which is the uppermost layer, since the high-absorbent polymer does not exist in the central portion in the width direction of the absorbent sheet 20, the high-absorbent polymer absorbs body fluid and swells. As a result, the feeling of oppression given to the body is reduced, and the wearing feeling is improved.

The outer shape of the highly absorbent polymer center non-laminated portion 23 may be a shape that can extend in the longitudinal direction, such as a straight line, a curved line, or a broken line.

The dimension in the longitudinal direction of the highly absorbent polymer center non-laminated portion 23 is preferably 50 mm or more and 300 mm or less, and the dimension in the width direction is preferably 1 mm or more and 30 mm or less. By setting the value within the above numerical range, the flexibility of the absorbent sheet 20 in the longitudinal direction and the width direction is further improved, and the fit is further improved.

As shown in FIG. 1 (b), the second layer of the highly absorbent polymer layer 222, which is the lowest layer of the absorbent sheet 20 located at the lowermost position, is the entire width direction of the highly absorbent polymer center non-laminated portion 23. Alternatively, it is preferable that the highly absorbent polymer is present in a part of the absorbent sheet 20 along the longitudinal direction and is present in a part of the width direction.

Thereby, the highly absorbent polymer can absorb the body fluid in the urination region without impairing the absorption performance, the fit, and the wearing feeling, and can prevent the body fluid from leaking in the central portion in the width direction of the absorbent sheet 20.

As shown in FIGS. 1 (b) and 1 (c), the absorbent sheet 20 located at the uppermost side and the absorbent sheet located at the lowermost side may be the same absorbent sheet 20. Is one absorbent sheet 20.

((Highly absorbent polymer non-laminated parts on both sides))
As shown in FIG. 1 (c), the absorbent article 1 according to the first embodiment of the present invention has only one absorbent sheet 20 and is a second layer which is the lowest layer in the absorbent sheet 20. The high-absorbent polymer layer 222 has high-absorbent polymer double-sided non-laminated portions 24 on both sides of the widthwise center line of the absorbent sheet 20 along the longitudinal direction of the absorbent sheet 20. Is preferable.

As a result, the body fluid is absorbed by the second layer, the highly absorbent polymer layer 222, which is the lowest layer, via the non-woven fabric sheet 21 and the non-laminated portions 24 on both sides of the highly absorbent polymer, so that the absorption performance is further improved. Further, by providing the non-laminated portions 24 on both sides of the highly absorbent polymer on both sides of the center line in the width direction of the absorbent sheet 20, the flexibility in the longitudinal direction and the width direction of the absorbent sheet 20 can be increased. It will be improved and the fit will be better. Further, by providing the highly absorbent polymer central non-laminated portion 23 and the highly absorbent polymer double-sided non-laminated portion 24, the feeling of oppression given to the body by the highly absorbent polymer absorbing body fluid and swelling is further reduced. The fit is better.

The outer shape of the non-laminated portion 24 on both sides of the highly absorbent polymer may be a shape that can extend in the longitudinal direction, such as a straight line, a curved line, or a broken line.

The dimension in the longitudinal direction of the non-laminated portion 24 on both sides of the highly absorbent polymer is preferably 50 mm or more and 300 mm or less, and the dimension in the width direction is preferably 1 mm or more and 30 mm or less. By setting the value within the above numerical range, the flexibility of the absorbent sheet 20 in the longitudinal direction and the width direction is further improved, and the fit is further improved.

<Three-dimensional gather>
Three-dimensional gathers may be provided on the upper surface of the absorbent article 1. This three-dimensional gather forms a confinement space for body fluid together with the top sheet 10 so as to prevent lateral leakage of body fluid. The three-dimensional gather preferably includes a three-dimensional gather sheet and an elastic elastic member arranged along a free end portion of the three-dimensional gather sheet. As the elastic elastic member, a thread-like, string-like, or flat-shaped member made of natural rubber, synthetic rubber, polyurethane, or the like can be appropriately used.

<Manufacturing method of absorbent articles>
The method for producing the absorbent article 1 is not particularly limited, and a conventionally known method can be adopted. For example, if necessary, a liquid diffusing sheet and a three-dimensional gather are arranged on the top sheet 10 in advance, and the absorbent sheet 20 is sandwiched between the top sheet 10 and the back sheet 30. In the absorbent sheet 20, the highly absorbent polymer layer 22 can be formed by applying an adhesive to the side on which the highly absorbent polymer is supported between the non-woven fabric sheets 21 and laminating the highly absorbent polymer. .. At this time, for example, a block material having the same outer shape as the outer shape of the highly absorbent polymer center non-laminated portion 23 and / or the highly absorbent polymer double-sided non-laminated portion 24 is used as the highly absorbent polymer center non-laminated portion 23 and / or the highly absorbent. The high-absorbency polymer center non-laminated portion 23 and / or the high-absorbent polymer double-sided non-laminated portion 24 can be provided by providing the polymer on both sides of the non-laminated portion 24 at a position where the high-absorbent polymer is laminated. .. Further, the absorbent article 1 is manufactured by fixing the top sheet 10 and the back sheet 30 with a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, or the like over a part or the entire circumference. Can be done.

[Second Embodiment]
FIG. 2 is a plan top view and a cross-sectional view of the absorbent article 1 according to the second embodiment of the present invention. The same as the configuration and manufacturing method of the absorbent article 1 according to the first embodiment of the present invention are as described above, and the description thereof will be omitted.

(Absorbable sheet)
As shown in FIGS. 2 (b) to 2 (d), in the second embodiment of the present invention, the absorbent article 1 is the absorbent sheet 201 located on the upper side and the absorbent sheet 202 located on the lower side. The second layer of the highly absorbent polymer layer 222, which is the lower layer of the first layer of the highly absorbent polymer layer 221 which is the uppermost layer of the absorbent sheet 201 located on the upper side and has one absorbent sheet 20, and the lower layer. Either or both of the first layer of the highly absorbent polymer layer 223, which is the upper layer of the absorbent sheet 202 located on the side, is the absorbent sheet 201 located on the upper side and / or the absorbent sheet 202 located on the lower side. In the central portion in the width direction of the above, the highly absorbent polymer center non-laminated portion 23 is provided along the longitudinal direction of the absorbent sheet 201 located on the upper side and / or the absorbent sheet 202 located on the lower side.

As a result, in at least two or more layers of the highly absorbent polymer layer 22, the highly absorbent polymer does not exist in the longitudinal direction at the center of the absorbent sheet 20 in the width direction, so that the absorbent sheet 20 serves as a urination region. Gel blocking can be reduced at the center of the width direction, and the absorption performance is improved. Further, at least two or more layers of the highly absorbent polymer layer 22 are provided with the highly absorbent polymer center non-laminated portion 23 in the longitudinal direction at the center portion in the width direction of the absorbent sheet 20, so that the rigidity is relatively relatively high. Even in the absorbent article 1 having two highly absorbent sheets 20, the flexibility in the longitudinal direction and the width direction is improved, and the fit is improved. Also. At least two or more highly absorbent polymer layers have two absorbent sheets 20 having relatively high rigidity because the high absorbent polymer is not present in the center of the absorbent sheet 20 in the width direction. Even in the case of the absorbent article 1, the highly absorbent polymer absorbs the body fluid and swells, so that the feeling of pressure given to the body is reduced and the wearing feeling is improved.

Further, as shown in FIGS. 2 (b) to 2 (c), in the second embodiment of the present invention, the absorbent article 1 is a second layer which is the lowest layer of the absorbent sheet 202 located at the lowermost side. In the high-absorbent polymer layer 224 of the above, the high-absorbent polymer is present along the longitudinal direction of the absorbent sheet 20 in all or part of the high-absorbent polymer central non-laminated portion 23 in the width direction, and is present in the width direction. It exists in a part of.

Further, as shown in FIGS. 2 (c) and 2 (d), the second layer of the highly absorbent polymer layer 222, which is the lower layer of the absorbent sheet 201 located on the upper side, and the absorbent sheet 202 located on the lower side. Either one of the first layer of the highly absorbent polymer layer 223, which is the upper layer, is a highly absorbent polymer on both sides of the widthwise center line of the upper absorbent sheet 201 or the lower absorbent sheet 202. It is preferable to have the non-laminated portions 24 on both sides of the highly absorbent polymer in which is not present along the longitudinal direction of the absorbent sheet 201 located on the upper side or the absorbent sheet 202 located on the lower side.

As a result, at least two or more layers of the highly absorbent polymer layer 22 are provided with the non-laminated portions 24 on both sides of the highly absorbent polymer, so that the flexibility in the longitudinal direction of the absorbent article 1 is further improved and the fit is improved. It will be even better. Further, at least two or more layers of the highly absorbent polymer layer 22 are provided with the non-laminated portions 24 on both sides of the highly absorbent polymer, so that the highly absorbent polymer absorbs the body fluid and swells, thereby giving a feeling of oppression to the body. Is further reduced, and the wearing feeling is further improved.

As a result, the distribution of the highly absorbent polymer in the central portion in the width direction of the absorbent article 1 is reduced to prevent the absorption performance from being deteriorated due to gel blocking, and the flexibility of the absorbent article 1 in the longitudinal direction and the width direction is increased. The fit can be improved by improving the fit, and the highly absorbent polymer absorbs the body fluid and swells to reduce the feeling of pressure on the body and improve the wearing feeling.

Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope of the invention described in the above embodiments. It is clear to those skilled in the art that it is possible to add. Further, it is clear from the description of the scope of claims that the form to which such a modification or improvement is added may be included in the technical scope of the present invention.

1 Absorbent article 10 Top sheet 20 Absorbent sheet 201 Upper absorbent sheet 202 Lower absorbent sheet 21 Non-woven fabric sheet 22 Highly absorbent polymer layer 221 Highly absorbent polymer of the first layer, which is the top layer Layer 222 Highly absorbent polymer layer of the second layer which is the lower layer (bottom layer)
223 Highly absorbent polymer layer of the first layer which is the upper layer 224 Highly absorbent polymer layer of the second layer which is the bottom layer 23 Highly absorbent polymer center non-laminated part 24 Highly absorbent polymer Both sides non-laminated part 30 Backsheet

Claims (1)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and one or more absorbent sheets arranged between the top sheet and the back sheet.
The absorbent sheet is
3 non-woven fabric sheets and
It has a highly absorbent polymer layer on which a highly absorbent polymer is supported between each non-woven fabric sheet.
The first layer of the highly absorbent polymer layer, which is the uppermost layer of the absorbent sheet located on the uppermost side, is
In the center portion in the width direction of the absorbent sheet, a highly absorbent polymer center non-laminated portion in which the highly absorbent polymer is not present is provided along the longitudinal direction of the absorbent sheet.
The second layer of the highly absorbent polymer layer, which is the lowest layer in the absorbent sheet located at the lowermost side, is
The highly absorbent polymer is present along the longitudinal direction of the absorbent sheet in a region including at least the center line in the width direction of the non-laminated portion of the center of the highly absorbent polymer.
The absorbent article has two absorbent sheets on the upper and lower sides,
The first layer of the highly absorbent polymer layer, which is the upper layer of the absorbent sheet located on the lower side, is
At the center of the absorbent sheet in the width direction, a highly absorbent polymer center non-laminated portion is provided along the longitudinal direction of the absorbent sheet, or is highly absorbent on both sides of the center line of the absorbent sheet in the width direction. Highly absorbent polymer non-laminated portions on both sides in the absence of the absorbent polymer are provided along the longitudinal direction of the absorbent sheet.
The second layer of the highly absorbent polymer layer, which is the lowest layer in the absorbent sheet located on the lower side, is
On both sides of the widthwise center line of the lower absorbent sheet, there are non-laminated portions on both sides of the highly absorbent polymer in which the high absorbent polymer does not exist along the longitudinal direction of the absorbent sheet located on the lower side. death,
The second layer of the highly absorbent polymer layer, which is the lower layer of the first layer of the highly absorbent polymer layer, which is the uppermost layer of the absorbent sheet located on the upper side, is
An absorbent article having a highly absorbent polymer center non-laminated portion in the widthwise central portion of the absorbent sheet along the longitudinal direction of the absorbent sheet in which the highly absorbent polymer does not exist.

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