JP7333264B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

In general, an absorbent article is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. body fluids are absorbed into the absorbent body through the topsheet. There are various types of absorbent articles, regardless of whether they are for adults or infants, such as tape-type absorbent articles, pants-type absorbent articles, incontinence pads, and light incontinence pads.

As an absorbent body constituting these absorbent articles, an absorbent body using a combination of fluff pulp and super absorbent polymer (hereinafter also referred to as "SAP") has been common. However, for the purpose of improving the feeling of wearing, appearance, touch, etc., and reducing urine regurgitation, a so-called high Absorbent sheets (hereinafter also referred to as "SAP sheets") are sometimes used as absorbers. Various studies have been made on superabsorbent sheets.

As a superabsorbent sheet, for example, in Patent Document 1, a first sheet and a second sheet, each of which has an adhesive coated surface on one side, and a longitudinal sheet between the adhesive coated surfaces of the first and second sheets, are described. and a plurality of SAP layers arranged in stripes extending in the direction of the second sheet, the adhesive is intermittently applied to the area facing the SAP layer on the adhesive-applied surface of the second sheet, and both sides of the SAP layer in the width direction discloses a superabsorbent sheet in which an adhesive is continuously applied in the longitudinal direction to the adhesive-applied surfaces of the first and second sheets that directly face each other without an SAP layer interposed therebetween.

Further, in Patent Document 2, between a top sheet and a back sheet, first and second absorbent bodies are arranged on one side and the other side in the width direction, respectively, and contain SAP, and the first and second absorbent bodies are A superabsorbent sheet is disclosed having first and second longitudinally extending folds, the first and second opposing folds.

JP 2006-158676 A JP 2013-42882 A

In Patent Document 1 and many other superabsorbent sheets, the base nonwoven fabric and the SAP are fixed using a hot-melt adhesive. Therefore, there is a problem that a feeling of discomfort is caused when wearing. In addition, compared to conventional absorbent bodies composed of fluff pulp and SAP, most of the superabsorbent sheets contain SAP at a high density by fixing the SAP to the base nonwoven fabric with an adhesive. Since the absorption time is long and the diffusibility of body fluids such as urine is poor, the absorbability is not fully satisfactory.

Furthermore, in the superabsorbent sheet described in Patent Document 2, although the fit to the crotch area is improved by having the structure described above, the point that the superabsorbent sheet has a hard touch is not improved. The feeling of wearing was not sufficiently satisfactory. Moreover, as with the superabsorbent sheet described in Patent Document 1, its absorbency was not sufficiently satisfactory.

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorbent article having good absorbency and wearability.

As a result of intensive research in view of the above problems, the inventors of the present invention have found that it is possible to solve the problems of superabsorbent sheets while using superabsorbent sheets, and to obtain absorbent articles that meet the objectives of the present invention. was completed. Specifically, the present invention provides the following absorbent articles (1) to (9) as preferred embodiments.

(1) A first aspect of the present invention is an absorbent comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet. wherein the absorbent body comprises a base nonwoven fabric having a raised surface on which fibers are raised, and is disposed opposite to a center portion in the width direction of the base nonwoven fabric, and has a widthwise dimension equal to the widthwise dimension of the base nonwoven fabric. 5% or more and 50% or less, a cover nonwoven fabric covering part of the raised surface of the base nonwoven fabric, and a superabsorbent sheet containing a superabsorbent polymer fixedly supported between the raised fibers of the base nonwoven fabric; a pulp-containing nonwoven fabric covering the raised surface of the base nonwoven fabric and the non-skin side of the cover nonwoven fabric entirely, wherein the raised surface of the base nonwoven fabric has a region facing the cover nonwoven fabric made of the superabsorbent polymer. The base nonwoven fabric is folded in three with the raised surface facing outward so that the non-existing area is a non-existent area, and both ends in the width direction of the absorbent body and their vicinity face the top sheet, and the both ends face each other. The distance between both ends is 10% or more and 50% or less of the width direction length of the absorbent body. The thickness under a ^cm2 load is 1.0 mm or more and 4.0 mm or less, and the thickness under a load of 35 g/ ^cm2 is 30% or more and 70% or less of the thickness under no load. absorbent article.
(2) A second aspect of the present invention is the absorbent article according to (1), wherein the cover nonwoven fabric has one edge or one edge in the longitudinal direction of the base nonwoven fabric at the center in the width direction of the base nonwoven fabric. is arranged to extend from the middle portion of the base nonwoven fabric to the other edge side or other middle portion in the longitudinal direction of the base nonwoven fabric.
(3) A third aspect of the present invention is the absorbent article of (1) or (2), wherein the cover nonwoven fabric has a longitudinal dimension larger than a width dimension of the base nonwoven fabric. big.
(4) A fourth aspect of the present invention is the absorbent article according to any one of (1) to (3), wherein the shape of both ends of the base nonwoven fabric in the longitudinal direction of the cover nonwoven fabric is substantially rectangular. , a substantially triangular shape, a substantially semicircular shape, and a substantially trumpet shape.
(5) A fifth aspect of the present invention is the absorbent article according to any one of (1) to (4), wherein the cover nonwoven fabric is an air-through nonwoven fabric and has a thickness of 0.1 mm or more and 3.0 mm or less. and a basis weight of 10 g/m ² or more and 60 g/m ² or less.
(6) A sixth aspect of the present invention is the absorbent article according to any one of (1) to (5), wherein the abundance ratio of the superabsorbent polymer in the folded portion of the absorbent body is is smaller than the abundance ratio of the superabsorbent polymer in.
(7) A seventh aspect of the present invention is the absorbent article according to any one of (1) to (6), wherein the base nonwoven fabric is an air-through nonwoven fabric and has a basis weight of 20 g/m2 or ^more and 120 g/m2. ² or less, the thickness is 0.3 mm or more and 8.0 mm or less, and the thickness of the fibers constituting the base nonwoven fabric is 1.8 dtex or more and 9.0 dtex or less.
(8) The eighth aspect of the present invention is the absorbent article according to any one of (1) to (7), wherein the superabsorbent polymer has a basis weight of 150 g/m ² or more and 1000 g/m ² or less. be.
(9) A ninth aspect of the present invention is the absorbent article according to any one of (1) to (8), wherein the pulp-containing nonwoven fabric has a basis weight of 40 g/m ² or more and 80 g/m ² or less. It is a composite type nonwoven fabric in which pulp fibers are entangled and integrated with a spunbonded nonwoven fabric made of polypropylene.

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article with a favorable absorptivity and a feeling of wearing can be provided.

1 is a plan view schematically showing the configuration of an absorbent article that is a first embodiment of the present invention; FIG. Fig. 2 is a perspective view schematically showing the structures of a base nonwoven fabric and a cover nonwoven fabric in an absorbent body provided in the absorbent article of the first embodiment; FIG. 2 is a cross-sectional view in the width direction schematically showing the configuration of a superabsorbent sheet in the absorbent body provided in the absorbent article of the first embodiment. Fig. 2 is a cross-sectional view in the width direction schematically showing the structure of an absorbent core provided in the absorbent article of the first embodiment; FIG. 4 is a cross-sectional view in the width direction schematically showing the configuration of an absorbent body of another embodiment provided in the absorbent article of the first embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same elements are given the same reference numerals and the first description is referred to. FIG. 1 is a schematic plan view of the absorbent article 50 viewed from the top sheet 25 side. 2 and 3 are schematic cross-sectional views in the width direction of main parts of the absorbent body 1. FIG. 4 and 5 are schematic cross-sectional views of the absorbent bodies 1 and 2 in the width direction, respectively. In each figure, each component is described as being in close contact, but one or more gaps may occur in at least one between each component. Moreover, each drawing does not define the size relationship of each component of the absorbent articles 1 and 2 .

The longitudinal direction of the absorbent article 50 is the direction indicated by Y in the drawing, which extends from the front and back of the wearer's body through the crotch region when the absorbent article 50 is worn. The width direction of the absorbent article 50 is the direction indicated by X in the drawing, which is orthogonal to the longitudinal direction. The thickness direction of the absorbent article 50 is the direction indicated by Z in the figure in which the constituent members such as the top sheet 25, the absorbent body 1 or 2, and the back sheet 30 are laminated. The skin side of the absorbent article 50 and each constituent member included therein is the surface that contacts the wearer's skin and the surface that faces the skin, and the non-skin side is the surface that contacts the wearer's clothing or faces the clothing. is the surface. Body fluids refer to liquids excreted from the body to the outside of the body, such as urine, blood, and water in loose stools.

[Absorbent article]
The absorbent article 50 of the present embodiment can be used as various absorbent articles regardless of whether it is for babies or adults. mentioned. Various paper diapers as an outer and the absorbent article 50 as an inner may be combined. The lengthwise and widthwise dimensions of the absorbent article 50 are not particularly limited, but are, for example, in the range of 100 mm or more and 800 mm or less and 50 mm or more and 500 mm or less, respectively. By adjusting the dimensions of the absorbent article 50 within the above range, absorbent articles for various uses can be obtained.

As shown in FIG. 1, the absorbent article 50 of the present embodiment is arranged to face the liquid-permeable top sheet 25, which is positioned on the skin side when the article is worn, and the top sheet 25. , a liquid-impermeable back sheet 30 relatively located on the non-skin side when wearing this, an absorbent body 1 disposed between the top sheet 25 and the back sheet 30, and the skin of the top sheet 25 and a pair of gather sheets 40 provided on the side surfaces. As a result, the absorbent body 1 has a structure sandwiched between the top sheet 25 and the back sheet 30 , and body fluids such as urine are absorbed and retained in the absorbent body 1 through the top sheet 25 . Leg gathers, waist gathers, side flaps, and the like can be appropriately provided according to the use and type of the absorbent article 50 . The absorbent article 50 of the present embodiment also includes a form in which the absorbent bodies 1 and 2 do not contain fluff pulp, absorbs bodily fluids, and is comfortable to wear.

Hereinafter, the sheet-like or plate-like constituent members will be described in more detail in the order of the top sheet 25, the absorbent body 1, the back sheet 30, and the three-dimensional gathers 40. FIG. In addition, these constituent members may have a three-dimensional structure other than the sheet shape and the plate shape.

(top sheet)
The top sheet 25 is a liquid-permeable sheet-like member that allows bodily fluids to pass quickly toward the absorbent body 1 , and is arranged to face the back sheet 30 with the absorbent body 1 interposed therebetween. Since the top sheet 25 may come into contact with the wearer's skin, it is preferable to use a base material that has a soft feel and does not irritate the skin. Examples of the substrate include hydrophilic nonwoven fabrics, composite nonwoven fabrics that are a laminate of hydrophilic nonwoven fabrics of the same or different types, apertured films such as apertured polyethylene films, foamed films such as urethane foams, and the like. Hydrophilic non-woven fabrics are made of, for example, synthetic fibers made of synthetic resins such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton. It is obtained by processing by a known method.

In addition, the top sheet 25 may be embossed or perforated on the surface in order to improve liquid permeability. As a method for applying these embossing and perforating processes, known methods can be implemented without limitation. In order to reduce irritation to the skin, the top sheet 25 may contain a lotion, an antioxidant, an anti-inflammatory ingredient, a pH adjuster, an antibacterial agent, a moisturizing agent, and the like.

From the viewpoint of strength, workability, and liquid return amount, the basis weight of the top sheet 25 is preferably 15 g/m ² or more and 40 g/m ² or less. The shape of the top sheet 25 is not particularly limited as long as it covers the absorbent core 1 and is required to guide bodily fluids to the absorbent core 1 without leakage.

(Absorber)
As shown in FIG. 4, the absorbent body 1 of this embodiment is adhered to the superabsorbent sheet 10, the raised surface of the base nonwoven fabric 11 and the non-skin side surface of the cover nonwoven fabric 15 in the superabsorbent sheet 10, and these A sheet-like laminate (absorber precursor) comprising a pulp-containing nonwoven fabric 20 that covers the sheet is molded into a predetermined three-dimensional shape instead of a flat shape. By having this structure, the absorbent body 1 can be an embodiment that does not contain fluff pulp, and in this embodiment, the backflow of urine is suppressed, and it becomes easier to maintain a dry texture.

More specifically, the absorber 1 is formed so that both width direction portions of the superabsorbent sheet 10 (laminated portions of the raised surface of the base nonwoven fabric 11 and the pulp-containing nonwoven fabric 20) are placed on the outside with the pulp-containing nonwoven fabric 20 facing outward. Both ends in the direction are folded inward toward the center, and the cross section in the width direction is molded so as to have a substantially C shape rotated to the left by about 90°. Here, when the base nonwoven fabric 11 is used as a reference, the raised surface of the base nonwoven fabric 11 is turned to the outside and folded in three. In the absorbent body 1, the folded width direction end faces 1A, 1B of the superabsorbent sheet 10 and the vicinity thereof face the top sheet 25 in the thickness direction, while the end faces 1A, 1B are separated from each other and face each other. Let "C" be the distance dimension between both end faces 1A and 1B, and let "D" be the width dimension of the absorbent body 1 (FIG. 4). At the widthwise central portion of the absorbent body 1, the widthwise central portion of the base nonwoven fabric 11 is exposed, and a concave portion 22 extending in the longitudinal direction is formed. An exposed surface 22a in the widthwise central portion of the base nonwoven fabric 11, which is the bottom surface of the concave portion 22, faces the top sheet 25. As shown in FIG.

In addition, although the absorbent body 1 of the present embodiment is formed so that the inward tri-fold folds draw a smooth arc (FIG. 4), it is not limited to this, and the absorbent body 2 of another embodiment is: As with the absorbent body 1, both widthwise side portions of the superabsorbent sheet 10 (laminated portions of the raised surface of the base nonwoven fabric 11 and the pulp-containing nonwoven fabric 20) are placed with the pulp-containing nonwoven fabric 20 facing outward, and both widthwise ends are It is folded in three toward the center, and the folded portion 13 makes the fold angular, and as a whole (especially the shape of the base nonwoven fabric 11), one end in the width direction is U-shaped and the other end in the width direction is reversed. It is formed in a U-shape (Fig. 5). Note that the absorbent body 2 shown in FIG. 5 has the same structure as the absorbent body 1 except that the folded portion 13 has a U-shaped cross-section with squared folds and an inverted U-shaped cross-section. be.

A groove-shaped concave portion 22 extending in the longitudinal direction of the absorbent body 1 and having a width of "C" is formed in the central portion of the absorbent body 1 of the present embodiment. This concave portion 22 functions like a slit of the absorbent body 1 . Moreover, it is preferable that the abundance ratio of the superabsorbent polymer 12 in the folded portion 13 of the absorbent body 1 is smaller than the abundance ratio of the superabsorbent polymer 12 in the non-folded portion. At this time, each existence ratio indicates the ratio of the abundance of the superabsorbent polymer 12 in the folded portion 13 or the non-folded portion (part other than the folded portion 13) to the total amount of the superabsorbent polymer 12 contained in the absorbent body 1. . The ratio of the abundance ratio of the superabsorbent polymer 12 in the non-folded portion 13 of the absorbent body 1 to the abundance ratio of the superabsorbent polymer 12 in the bent portion is preferably 1/99 or more and 49/51 or less, and 5/ More preferably, it is 95 or more and 40/60 or less. By having more superabsorbent polymer 12 in the non-folded portion, the absorption performance of the absorbent body 1 can be improved.

The absorber 1 of the present embodiment preferably has a longitudinal dimension of 100 mm or more and 800 mm or less, more preferably 150 mm or more and 500 mm or less. Moreover, the dimension D in the width direction of the absorbent body 1 is preferably 50 mm or more and 500 mm or less, and more preferably 66 mm or more and 400 mm or less. At this time, the ratio of the distance C between both end surfaces 1A and 1B of the absorbent body 1 to the width direction dimension D of the absorbent body 1 (the width C of the groove-shaped concave portion 22) is 10% or more and 50% or less, preferably 13%. % or more and 47% or less. Thereby, the absorption speed of the absorbent body 1 is further improved.

The thickness of the absorbent body 1 in a flat state is the thickness measured under a load of 35 g/cm ² in a flat state before being folded in three (hereinafter also referred to as “thickness under a load of 35 g/cm ² ”). is 1.0 mm or more and 4.0 mm or less, preferably 1.5 mm or more and 3.8 mm or less. When the thickness under load of 35 g/m ² of the absorbent body 1 is set within the above numerical range, the wearing feeling of the absorbent article 50 including the absorbent body 1 becomes even better. The thickness of the absorbent body 1 in a flat state before being folded in three includes the base nonwoven fabric 11 having the superabsorbent polymer 12 fixedly supported on the raised surface, the cover nonwoven fabric 15 arranged opposite to the raised surface of the base nonwoven fabric 11, It means the total thickness of the raised surface of the base nonwoven fabric 11 and the pulp-containing nonwoven fabric 20 adhered to the skin side of the cover nonwoven fabric 15 . In addition, the thickness under 35 g/cm ² load of the absorbent body 1 is 30% or more and 70% or less, preferably 40%, of the thickness measured under no load (hereinafter also referred to as "thickness under no load"). 60% or less. By setting the thickness ratio within the above numerical range, the wearing feeling of the later-described absorbent article 50 having the absorbent body 1 is improved. Further, by setting the thickness and the thickness ratio within the respective ranges as described above, the absorbent article 50 as a whole does not become bulky and can be worn comfortably even when the absorbent body 1 is folded inwards as described later.

The absorber 1 of this embodiment uses a superabsorbent sheet 10 containing a base nonwoven fabric 11 having a raised surface on one side. By raising one side surface of the base nonwoven fabric 11, in addition to the original bulkiness of the nonwoven fabric of the base nonwoven fabric 11, appropriate thickness and softness are imparted, appropriate cushioning properties are generated, and fitting feeling when worn is improved. can be made In addition, the superabsorbent polymer 12 is dispersed and fixedly held between the fibers of the raised portion of the base nonwoven fabric 11, so that body fluids such as urine are appropriately diffused or retained in the base nonwoven fabric 11 around the superabsorbent polymer 12. be done. In addition, in the absorbent body 1 of the present embodiment, the base nonwoven fabric 11 is exposed in the central portion of the absorbent body 1 by arranging the superabsorbent sheet 10 in a shape in which the raised surface is folded inward in three. Since this part functions like a slit of the absorbent body 1, the absorption speed is increased and the diffusibility of the body fluid is improved.

Hereinafter, constituent members of the absorbent body 1 will be described in detail.
(Base nonwoven fabric)
FIG. 2 is a perspective view of the base nonwoven fabric 11 and the cover nonwoven fabric 15 used in the absorbent body 1 of the present invention. As shown in FIG. 2, one side surface of the base nonwoven fabric 11 is in a raised state. Therefore, in addition to the inherent bulkiness of the nonwoven fabric, the high-absorbent sheet 10 is imparted with appropriate thickness and softness, thereby generating appropriate cushioning properties and improving fit when worn. Further, by raising the base nonwoven fabric 11 as described above, the superabsorbent polymer 12 can be dispersed between the fibers of the raised portion of the base nonwoven fabric 11 and fixedly supported. Examples of methods for raising one side surface of the base nonwoven fabric 11 include a rotating saw blade and needle punching. From the viewpoint of in-line productivity and cost, it is preferable to use a method of raising with a rotating saw blade. The raised state in the present embodiment is not particularly limited, and it is sufficient if the raised state can be visually confirmed. More specifically, the raised rate of the base nonwoven fabric 11 is preferably 5% to 90%, and % or less. The raising rate means the rate of increase in the thickness of the base nonwoven fabric 11 due to the raising process. For example, when the thickness of the base nonwoven fabric 11 before raising is T1 and the thickness of the base nonwoven fabric 11 after raising is T2, the raising ratio (%) can be expressed as (T2−T1)/T1×100. . The thickness is obtained by measuring the thickness under no load using a height gauge (manufactured by Mitutoyo Corporation).

Examples of the base nonwoven fabric 11 include nonwoven fabrics such as air-through nonwoven fabrics, point-bond nonwoven fabrics, spunbond nonwoven fabrics, and meltblown nonwoven fabrics, and composite nonwoven fabrics obtained by laminating spunbond nonwoven fabrics/meltblown nonwoven fabrics and spunbond nonwoven fabrics/meltblown nonwoven fabrics/spunbond nonwoven fabrics. be able to. Among these nonwoven fabrics, it is preferable to use an air-through nonwoven fabric, which is easy to obtain bulkiness.

The lengthwise dimension of the base nonwoven fabric 11 is preferably 100 mm or more and 800 mm or less, more preferably 150 mm or more and 700 mm or less. Furthermore, the dimension B in the width direction of the base nonwoven fabric 11 is preferably 75 mm or more and 900 mm or less, and more preferably 105 mm or more and 380 mm or less.

The thickness of the base nonwoven fabric 11 is preferably 0.3 mm or more and 8.0 mm or less, more preferably 2.0 mm or more and 6.0 mm or less, from the viewpoint of the balance between wearing comfort and absorption performance. The basis weight of the base nonwoven fabric 11 is preferably 20 g/m ² or more and 120 g/m ² or less, more preferably 30 g/m ² or more and 110 g/m ² or less.
Furthermore, the thickness of the fibers forming the base nonwoven fabric 11 is preferably 1.8 dtex or more and 9.0 dtex or less, and more preferably 2.0 dtex or more and 6.0 dtex or less. By adjusting the thickness of the fibers constituting the base nonwoven fabric 11 within the above numerical range in this manner, the superabsorbent polymer 12 is dispersed between the fibers of the raised portion of the base nonwoven fabric 11, making it easier to fix and carry. be able to.

(Cover nonwoven fabric)
As shown in FIG. 2, a cover nonwoven fabric 15 is arranged on the raised surface of the base nonwoven fabric 11 so as to partially cover the raised surface of the base nonwoven fabric 11 . With the cover nonwoven fabric 15, the raised surface of the superabsorbent sheet 10, which overlaps the cover nonwoven fabric 15 in the thickness direction when the superabsorbent polymer 12 is fixedly supported in the production of the superabsorbent sheet 10 described later, has , areas 14 free of superabsorbent polymer 12 are provided. Due to the non-existence of the superabsorbent polymer 12 in the non-existing region 14 , the non-existing region 14 plays the role of a pseudo slit, allowing body fluids to quickly diffuse into the absorbent body 1 . The base material of the cover nonwoven fabric 15 may be any material that has a high diffusion rate of bodily fluids and can diffuse quickly. For example, a hydrophilic nonwoven fabric, particularly an air-through nonwoven fabric, is preferable. The cover nonwoven fabric 15 is preferably adhered to the raised surface of the base nonwoven fabric 11 with a hot-melt adhesive.

As shown in FIG. 2, the cover nonwoven fabric 15 is arranged along the longitudinal direction. Further, as shown in FIG. 2, the cover nonwoven fabric 15 is arranged so as to extend from one edge side to the other edge side in the longitudinal direction of the base nonwoven fabric 11 at the center in the width direction of the base nonwoven fabric 11 . The shape is not limited, and it may be arranged so as to extend from one longitudinal middle portion of the base nonwoven fabric 11 to the other edge or other longitudinal middle portion. The ratio of the widthwise dimension A of the cover nonwoven fabric 15 to the widthwise dimension B of the base nonwoven fabric 11 is preferably 5% or more and 50% or less. If the ratio exceeds 50%, the thickness of the cover nonwoven fabric 15 tends to increase the thickness of the absorbent body 1 . If the ratio is less than 5%, the superabsorbent polymer 12 at the position that receives the body fluid will swell after absorbing water, gel blocking will occur, and the absorbency of the absorbent body 1 will tend to decrease. Note that "arranged at the center in the width direction" means that the center in the width direction of the base nonwoven fabric 11 and the center in the width direction of the cover nonwoven fabric 15 are arranged at the same position in the thickness direction. Moreover, the ratio of the widthwise dimension A of the cover nonwoven fabric 15 to the widthwise dimension B of the base nonwoven fabric 11 is preferably 8% or more and 47% or less. Moreover, the cover nonwoven fabric 15 is configured such that its longitudinal dimension is larger than its width dimension.

The longitudinal dimension of the cover nonwoven fabric 15 is preferably 100 mm or more and 800 mm or less, more preferably 150 mm or more and 500 mm or less. Furthermore, the dimension A in the width direction of the cover nonwoven fabric 15 is preferably 4 mm or more and 475 mm or less, more preferably 5 mm or more and 190 mm or less. The thickness of the cover nonwoven fabric 15 is preferably 0.1 mm or more and 3.0 mm or less, and the basis weight thereof is preferably 10 g/m ² or more and 60 g/m ² or less, more preferably 15 g/m ² or more and 40 g/m ^{2 or} less. . When the thickness is less than 0.1 mm or the basis weight is less than 10 g/m ² or greater than 60 g/m ² , the liquid is not sufficiently diffused throughout the superabsorbent polymer 12 fixedly supported on the base nonwoven fabric 11 . do not have. If the thickness is more than 3.0 mm, the resulting product will be hard and uncomfortable to wear, which is not preferable.

In the cover nonwoven fabric 15 of the present embodiment, the plane shape of both ends in the longitudinal direction of the base nonwoven fabric 11 is substantially quadrilateral, but is not limited thereto. ) may be used. Here, the planar shape of both ends of the base nonwoven fabric 11 in the longitudinal direction means the shape of a portion obtained by cutting only the tip portion of the cover nonwoven fabric 15 in the width direction. Thus, even if the planar shape of the cover nonwoven fabric 15 is partially changed, by appropriately adjusting the total area of the non-existing region 14, substantially the same effect as or better than that of the present embodiment can be obtained. In addition, a frame-shaped cover nonwoven fabric 15 may be provided along the four peripheral edges of the base nonwoven fabric 11 , and a plurality of strip-shaped cover nonwoven fabrics 15 extending in the longitudinal direction of the base nonwoven fabric 11 may be arranged in the width direction of the base nonwoven fabric 11 . may be arranged substantially parallel to the

(super absorbent sheet)
FIG. 2 is a cross-sectional view in the width direction of the superabsorbent sheet 10 used in the absorbent body 1 of this embodiment. As shown in FIG. 2, the superabsorbent sheet 10 used in the absorbent body 1 of the present embodiment includes a base nonwoven fabric 11 having a raised surface on one side, a cover nonwoven fabric 15 covering part of the raised surface of the base nonwoven fabric 11, and a base. and a superabsorbent polymer 12 fixedly supported between fibers of the raised portion of the nonwoven fabric 11 . The superabsorbent polymer 12 is dispersed and fixedly held between the fibers of the raised portion of the base nonwoven fabric 11, so that body fluids such as urine are appropriately diffused or retained in the base nonwoven fabric 11 around the superabsorbent polymer 12. As a result, absorption performance is improved, and sufficient absorption performance can be secured even without fluff pulp. In addition, as described above, the presence of the cover nonwoven fabric 15 provides the non-existing region 14 of the superabsorbent polymer 12 on the napped surface of the superabsorbent sheet 10 overlapping the cover nonwoven fabric 15 in the thickness direction. The existence region 14 plays a role of a pseudo slit, and the water absorption performance of the superabsorbent sheet 10 and the absorber 1 described later is improved.

(super absorbent polymer)
The superabsorbent polymer 12 is not particularly limited as long as it can absorb urine and prevent backflow. Polyacrylate, polyaspartate, (starch-acrylic acid) graft copolymer, ( Those formed from materials such as acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer and saponified products thereof can be used. Among these, polyacrylates are preferable, and sodium polyacrylate is more preferable, from the viewpoint of absorption amount per weight. Moreover, the basis weight of the superabsorbent polymer 12 is preferably 150 g/m ² or more and 1000 g/m ² or less in order to ensure the absorption performance required for various absorbent articles. Further, from the viewpoint of further improving the absorption performance, the touch after absorption, and the ease of movement of the wearer, the basis weight of the superabsorbent polymer 12 is more preferably 300 g/m ² or more and 900 g/m ² or less.

Moreover, when the superabsorbent polymer 12 in powder form is used, the particle size is not particularly limited and can be appropriately selected from a wide range. By using the powder within this range, it is possible to improve the basic performance of absorbing body fluids and reduce the rough feel caused by the hardening of the superabsorbent sheet 10 . If the particle size is less than 50 μm, the flowability of the powder of the superabsorbent polymer 12 tends to decrease, and the ability to absorb bodily fluids tends to decrease. There is a tendency for the skin to feel tacky, and there is a tendency for the skin to feel rough after absorption of bodily fluids. It is also possible to use superabsorbent polymers in fibrous form.

The superabsorbent polymer 12 is preferably fixedly supported between the fibers of the raised portion of the base nonwoven fabric 11 by a hot-melt adhesive. Hot melt adhesives work particularly well to reinforce the fixed support of 12 . By fixing and carrying the superabsorbent polymer 12 between the fibers of the raised surface of the base nonwoven fabric 11, the superabsorbent polymer 12 is supported by a plurality of members including the surface of the base nonwoven fabric 11 and the raised fibers. Therefore, it is possible to reduce the amount of adhesive used for fixing and supporting, and to suppress the occurrence of stiff feeling caused by the adhesive. Moreover, the content of the hot-melt adhesive is preferably 10 g/m ² or less so as not to impair the absorbency of the superabsorbent polymer 12 and not to impair the touch when worn. Hot melt adhesives include synthetic rubbers such as styrene-butadiene-styrene copolymers and styrene-isoprene-styrene copolymers, or ethylene-vinyl acetate copolymers with a melting point of 100° C. or higher and 180° C. or lower. An olefin-based hot-melt adhesive such as can be used. As a method for applying the hot-melt adhesive, known methods such as a curtain coating method and a spiral method in which the hot-melt adhesive in a molten state is applied from a nozzle in a non-contact manner, and a slot method in which the adhesive is applied in a contact manner can be used.

(Pulp-containing nonwoven fabric)
As shown in FIGS. 4 and 5, the absorbent bodies 1 and 2 of this embodiment have pulp-containing nonwoven fabrics 20 and 21 bonded to the raised side of the base nonwoven fabric 11 and the non-skin side of the cover nonwoven fabric 15 . Pulp-containing nonwoven fabrics 20 and 21 have, for example, a function of protecting the structure of the absorbent bodies 1 and 2 and quickly guiding bodily fluids to the absorbent body 1 . Further, by adhering the raised surface of the base nonwoven fabric 11 to the pulp-containing nonwoven fabrics 20, 21, it is possible to prevent the superabsorbent polymer 12 from falling out of the absorbent bodies 1, 2, thereby improving the feel when worn. can be made The pulp-containing nonwoven fabrics 20 , 21 are integrated products of the spunbond nonwoven fabric 31 and the wood pulp fiber layer 32 . Here, "integrated" means that at least when the absorbent article 1 is used, these layers 31 and 32 are not peeled off even partially and their functions are not significantly reduced. The pulp-containing nonwoven fabric 20 is a composite type in which a wood pulp layer 31 is provided by entangling and integrating wood pulp fibers in a spunbond nonwoven fabric (preferably a spunbond nonwoven fabric made of polypropylene) 30 by water jet without using a binder. A non-woven fabric is preferred.

The composite nonwoven fabric of the present embodiment is, for example, a spunbonded nonwoven fabric (preferably a polypropylene spunbonded nonwoven fabric) 31, and a layer 32 of wood pulp fibers bonded to the nonwoven fabric 31 by entangling is formed on one surface. In some cases, wood pulp fibers are bound to the other surface by entanglement. That is, a preferable form of the pulp-containing nonwoven fabric 20 includes a form including a spunbond nonwoven fabric 31 and a wood pulp fiber layer 32 hydroentangled and integrated on at least one surface of the spunbond nonwoven fabric 31 . In this form, it is preferable that the spunbond nonwoven fabric 31 is arranged so as to face the absorbent body 1 so that the wood pulp fiber layer 32 faces the clothing side as shown in FIGS. 4 and 5 . Here, examples of wood pulp fibers include flap pulp, softwood kraft pulp sheets, and the like, and these fibers can be used alone or in combination of two or more. The wood pulp fiber layer 30 quickly absorbs bodily fluids and guides them to the absorbent body 1. - 特許庁

The basis weight of the pulp-containing nonwoven fabric 20 is preferably 40 g/m ² or more and 80 g/m ² or less. When bonding the raised surface of the base nonwoven fabric 11 to the pulp-containing nonwoven fabric 20, it is preferable to fix them with a hot-melt adhesive or thermal embossing.
By having each structure as described above, even if the absorbent body 2 is used in place of the absorbent body 1, the same excellent effect as that of the absorbent body 1 can be obtained. The absorbent body 2 shown in FIG. 5 has a pulp-containing nonwoven fabric 21 instead of the pulp-containing nonwoven fabric 20, but the pulp-containing nonwoven fabric 21 is also an integrated product of the spunbond nonwoven fabric 31 and the wood pulp fiber layer 32. For example, , has the function of reinforcing the structure of the absorbent body 2 and quickly absorbing bodily fluids to lead them to the absorbent body 2 .

<Method for manufacturing absorber>
The method of manufacturing the absorbent bodies 1 and 2 is not particularly limited, but the following method can be given as an example. First, one side surface of the base nonwoven fabric 11 is raised using a rotating saw blade or a needle punch. Thereafter, the cover nonwoven fabric 15 is adhered to the raised surface of the base nonwoven fabric 11 using a hot-melt adhesive or the like. Next, a superabsorbent polymer 12 is fixed between the fibers of the raised portion of the base nonwoven fabric 11 with a hot-melt adhesive or the like to obtain a superabsorbent sheet 10 . The cover nonwoven fabric 15 provides a region 14 where the superabsorbent polymer 12 does not exist under the cover nonwoven fabric 15 and functions like a slit in the absorbent body 1 . Thereafter, the raised surface side of the base nonwoven fabric 11 and the pulp-containing nonwoven fabric 20 are adhered with a hot-melt adhesive or the like to obtain an absorbent precursor. This absorbent body precursor is folded in three with the raised surface of the base nonwoven fabric 11 facing outward and both ends in the width direction are folded toward the center as shown in FIG. 4 or FIG.

(back seat)
The back sheet 30 may be formed using a liquid-impermeable base material that does not allow the body fluids held by the absorbent bodies 1 and 2 to wet clothes. is formed from a material such as a laminated composite sheet. The nonwoven fabric used for the composite sheet is not particularly limited in manufacturing method, and examples thereof include spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunbond nonwoven fabrics/meltblown nonwoven fabrics, composite nonwoven fabrics obtained by laminating spunbond nonwoven fabrics/meltblown nonwoven fabrics/spunbond nonwoven fabrics, and these. Composite materials are mentioned. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, composite films of polyethylene and polypropylene, and the like.

From the viewpoint of strength and workability, the basis weight of the backsheet 30 is preferably 15 g/m ² or more and 40 g/m ² or less. In addition, it is preferable that the back sheet 30 has air permeability in order to prevent stuffiness during wearing. In order to make the back sheet 30 air-permeable, for example, a filler may be added to the base resin film, or the back sheet 30 may be embossed for perforation. Calcium carbonate can be used as a filler, and a known method can be used without limitation as a method for blending the filler. For example, a breathable resin film can be obtained by kneading a synthetic resin with a filler, molding the resulting kneaded product into a film or sheet, and removing the filler from the obtained film or sheet. can.

(Three-dimensional gather)
In addition, as shown in FIG. 1, the absorbent article 50 is provided with both side edges of the skin side surface of the top sheet 25 along the longitudinal direction of the absorbent article 50 in order to prevent lateral leakage of bodily fluid excreted by the user. A pair of three-dimensional gathers 40 are provided in the part. One widthwise end of the three-dimensional gathers 40 in the widthwise direction of the absorbent article 50 is fixed near both side ends of the skin side surface of the back sheet 30 (or near both side ends of the non-skin side surface), and the middle portion in the width direction is fixed to the top. A three-dimensional gathered sheet is arranged such that it is fixed near both side ends of the skin side of the sheet 25 and the other end in the width direction is a free end that is not fixed to the top sheet 25 . By providing an elastic member for three-dimensional gathers along the longitudinal direction near the free ends, the free ends of the three-dimensional gathers 40 are given standability and can be deformed according to the body shape of the wearer.

As the three-dimensional gather elastic member, for example, a polyurethane thread, a band-like polyurethane film, a thread-like or band-like natural rubber, or the like is used. nonwoven fabrics, for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunbond/meltblown/spunbond three-layer laminated composite nonwoven fabrics, and the like are used.

<Method for manufacturing absorbent article>
As a method for manufacturing the absorbent article 50, the absorbent body 1 or the absorbent body 2 obtained as described above is sandwiched between the top sheet 25 and the back sheet 30, and the three-dimensional gathers 40 are formed on the top sheet 25. The top sheet 25 and the back sheet 30 are partially or entirely fixed using a hot-melt adhesive, heat embossing, ultrasonic embossing, high-frequency embossing, or the like. When the absorbent article 50 is a urine absorption pad or a light incontinence pad, the absorbent article 50 may be individually wrapped in a package and then folded in three in the longitudinal direction. In addition, leg gathers, waist gathers, side flaps, etc. can be provided as necessary.

Although the present invention has been described 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 will be clear to those skilled in the art that improvements are possible. In addition, it is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

Hereinafter, the present invention will be described in detail with reference to examples. It should be noted that the present invention is by no means limited to the examples shown below.

(Example 1) <Preparation of Absorbent Body and Absorbent Article>
First, an air-through nonwoven fabric (basis weight: 40 g/m ² , width dimension: 100 mm, longitudinal dimension: 400 mm, thickness before raising: 0.4 mm) was prepared as a base nonwoven fabric, and one side surface of the base nonwoven fabric was physically cut with a rotating saw blade. Raised (thickness after raising: 0.5 mm, raising rate: 25%), cover nonwoven fabric (basis weight: 15 g/m ² , widthwise dimension: 30 mm, longitudinal dimension: 400 mm) was attached to the base nonwoven fabric with a hot-melt adhesive. It was adhered to the central portion in the width direction with a distance of 35 mm from both ends in the width direction. After that, a commercially available superabsorbent polymer (basis weight: 380 g/m ² ) is dispersed on the raised surface of the base nonwoven fabric, and fixed and supported between the fibers of the raised portion of the base nonwoven fabric with a hot-melt adhesive to form a superabsorbent sheet. got

Further, a pulp-containing nonwoven fabric (basis weight: 40 g/m ² , widthwise dimension: 100 mm, longitudinal dimension: 400 mm) was prepared. A pulp-containing nonwoven fabric coated with a melt adhesive was adhered to obtain an absorbent precursor. The wood pulp fiber layer of the pulp-containing nonwoven was placed facing outward. Next, the absorbent body precursor was placed so that the raised surface of the base nonwoven fabric faced the outside, and the left and right sides were folded in three by 20 mm, leaving a central portion of 60 mm (distance C). Thus, an absorbent body of Example 1 was obtained. The widthwise dimension D of the absorbent body was 60 mm, and the cross-sectional shape of the bent portion was an arc without corners.

(Example 2)
An absorbent body precursor obtained by using an air-through nonwoven fabric with a width dimension of 114 mm and a longitudinal dimension of 400 mm as the base nonwoven fabric and an air-through nonwoven fabric with a width dimension of 11.4 mm and a longitudinal dimension of 400 mm as the cover nonwoven fabric. An absorbent body of Example 2 was produced in the same manner as in Example 1, except that 27 mm on each side of the body was folded inward toward the center, leaving 60 mm (C) of the central portion of the body. The widthwise dimension D of the obtained absorbent body was 60 mm.

(Example 3)
An absorber precursor obtained by using an air-through nonwoven fabric with a width dimension of 90 mm and a longitudinal dimension of 400 mm as a base nonwoven fabric and an air-through nonwoven fabric with a width dimension of 45 mm and a longitudinal dimension of 400 mm as a cover nonwoven fabric. An absorbent body of Example 3 was produced in the same manner as in Example 1, except that left 60 mm of the central portion was left and 15 mm of the left and right sides were folded toward the center by inward tri-folding. The widthwise dimension D of the obtained absorbent body was 60 mm.

(Comparative example 1)
Absorption of Comparative Example 1 in the same manner as in Example 1 except that a base nonwoven fabric and a pulp-containing nonwoven fabric having a width dimension of 60 mm and a longitudinal dimension of 400 mm were used, and the cover nonwoven fabric was not used and arranged without being folded. made the body.

(Comparative example 2)
Air-through nonwoven fabric (basis weight 20 g/m ² )/superabsorbent polymer (basis weight 280g/m ² )/air-through nonwoven fabric (basis weight 20g/m ² )/superabsorbent polymer (basis weight 100g/m ² )/spunlace A sheet (all dimensions in the width direction are 60 mm and all dimensions in the longitudinal direction are 400 mm) laminated with nonwoven fabric (basis weight: 20 g/m ² ) was used as an absorber. As each air-through nonwoven fabric used in Comparative Example 2, a non-raised nonwoven fabric like the base nonwoven fabric of Example 1 was used.

(Comparative Example 3)
A mixture of superabsorbent polymer (basis weight: 380 g/m ² ) and fluff pulp (basis weight: 400 g/m ² ) was covered with tissue paper (basis weight: 16 g/m ² ). It was made into a substantially rectangular shape with a directional dimension of 400 mm and used as an absorber.

(Comparative Example 4)
Using a base nonwoven fabric and a pulp-containing nonwoven fabric each having a width dimension of 60 mm and a longitudinal dimension of 400 mm, a super absorbent polymer is dispersed at a basis weight of 135 g/m ² to produce a super absorbent sheet, An absorbent body of Comparative Example 4 was produced in the same manner as in Example 1, except that it was arranged without being folded.

Each of the absorbent bodies obtained in Examples 1 to 3 and Comparative Examples 1 to 4 was used as a top sheet (polypropylene spunbond nonwoven fabric, basis weight 20 g/m ² ) and a back sheet (breathable polyethylene film, basis weight 17 g/m ^{2 )} . ), a three-dimensional gather is installed on the top sheet, the top sheet and the back sheet are joined by heat embossing over the entire circumference, and each of Examples 1 to 3 and Comparative Examples 1 to 4 An absorbent article was made.

<Measurement items>
Using the absorbent article obtained as described above, the following absorption rate, reversion amount and absorbent body thickness were measured. Moreover, the following sensory evaluation was performed. Each result is shown in Table 1.
(Absorption rate)
40 ml of 0.9% by mass saline (37° C.) was poured into the absorber of each example and each comparative example from a cylinder with an inner diameter of 30 mm under a pressure of 46 g/cm ² , and the saline was poured into the absorber. The time (seconds) until it was absorbed by the surface was measured as the first absorption rate. After 3 minutes had passed, 40 ml of 0.9% by mass physiological saline (37° C.) was poured again, and the time (seconds) until the physiological saline was absorbed by the surface of the absorber was measured as the second absorption rate. A smaller value means better absorbency.
(Reverse amount)
200 ml of physiological saline was poured into the absorbers of Example 1 and each comparative example, and 10 minutes after the water was poured, the filter paper was pressed against the absorber surface with a load of 35 gf/cm ² and returned to the filter paper in 1 minute. The moisture content was measured and used as the amount of reversion. The smaller the backflow amount, the drier the absorbent body.
(Thickness of absorber)
The thickness of the absorbent precursor or absorbent of each example and each comparative example was measured when no pressure was applied and when a predetermined pressure (here, 35 g/cm ² ) was applied. The thickness under a load of 35 g/cm ² is obtained by subtracting the height of the weight itself at a predetermined position from the height of the weight at the predetermined position when the weight is placed on the absorbent article. .
(sensory evaluation)
With the cooperation of eight panelists, the wearing feeling (fitness, softness) and absorbency (absorption) when wearing a tape-fastening type absorbent article using each absorber of Example 1 and each comparative example A sensory evaluation was carried out with two choices of "good" or "bad" for the non-leakage to the outside of the product and the dry feeling). The wearer used the device for 8 hours and evaluated it in daily activities. The results are shown in Table 1.
〇: When the number of wearers who chose “good” is 6 or more and 8 or less △: When the number of wearers who chose “good” is 3 or more and 5 or less ×: When the number of wearers who chose “good” is 1 1 or 2 people, or when none of the wearers chose "Good"

Examples 1 to 3, in which the napped surface was turned to the outside and were folded in three, were excellent in terms of softness, fit, no leakage to the outside of the absorbent article, and dryness. On the other hand, Comparative Example 1, in which only one superabsorbent sheet having no cover nonwoven fabric was used, was inferior in fit and dryness. Comparative Example 2, in which the base nonwoven fabric and the superabsorbent polymer were laminated, was significantly inferior in softness and fitting feeling, and leakage to the outside of the absorbent article occurred. Comparative Example 3 using fluff pulp was significantly inferior in dry feeling. Moreover, in Comparative Example 4 using a superabsorbent polymer having a small basis weight, the feeling of fit was poor, and leakage to the outside of the absorbent article occurred.
As described above, according to the absorbent article of the present invention, it is possible to provide an absorbent body that does not contain fluff pulp and has good absorbency and wearability, and an absorbent article comprising the absorbent body.

Reference Signs List 1, 2 Absorbent body 1A, 1B, 2A, 2B Width direction end surface of absorbent body 10 Super absorbent sheet 11 Base nonwoven fabric 12 Super absorbent polymer 13 Folded portion 14 Non-existing region 15 Cover nonwoven fabric 20, 21 Pulp-containing nonwoven fabric 22 Recessed portion 22a bottom surface of concave portion 25 top sheet 30 back sheet 31 spunbond nonwoven fabric 32 wood pulp fiber layer 40 three-dimensional gather 50 absorbent article

Claims (9)

An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet,
The absorber is
A base nonwoven fabric having a raised surface on which fibers are raised, and a base nonwoven fabric arranged opposite to the widthwise central portion of the base nonwoven fabric, and having a widthwise dimension of 5% or more and 50% or less of the widthwise dimension of the base nonwoven fabric, a superabsorbent sheet comprising: a cover nonwoven fabric covering part of the raised surface of the base nonwoven fabric; and a superabsorbent polymer fixedly supported between the raised fibers of the base nonwoven fabric;
a pulp-containing nonwoven fabric covering the raised surface of the base nonwoven fabric and the non-skin side of the cover nonwoven fabric,
A region of the raised surface of the base nonwoven fabric facing the cover nonwoven fabric is a non-existing region of the superabsorbent polymer,
While both ends in the width direction of the absorbent body and their vicinity face the top sheet, the base nonwoven fabric has a three-dimensional shape folded in three with the raised surface of the base nonwoven fabric facing outward, The distance length between both ends is 10% or more and 50% or less of the width direction length of the absorbent body,
In the absorbent body in a flat state before being folded in three, the thickness under a load of 35 g/cm ² is 1.0 mm or more and 4.0 mm or less, and the thickness under a load of 35 g/cm ² is less than the thickness under no load. An absorbent article characterized by having a thickness of 30% or more and 70% or less. The cover nonwoven fabric extends from one edge side or one middle portion in the longitudinal direction of the base nonwoven fabric to the other edge side or other middle portion in the longitudinal direction of the base nonwoven fabric at the widthwise central portion of the base nonwoven fabric. 2. The absorbent article of claim 1, wherein the absorbent article is placed in a 3. The absorbent article according to claim 1, wherein the cover nonwoven fabric has a longitudinal dimension larger than a widthwise dimension of the base nonwoven fabric. 4. The cover nonwoven fabric according to any one of claims 1 to 3, wherein the shape of both ends in the longitudinal direction is at least one selected from the group consisting of substantially square, substantially triangular, substantially semicircular, and substantially trellis-shaped. 1. The absorbent article according to item 1. The cover nonwoven fabric according to any one of claims 1 to 4, wherein the cover nonwoven fabric is an air-through nonwoven fabric, has a thickness of 0.1 mm or more and 3.0 mm or less, and a basis weight of 10 g/m ² or more and 60 g/m ² or less. The absorbent article described. The absorbent article according to any one of claims 1 to 5, wherein the abundance ratio of the superabsorbent polymer in the folded portion of the absorbent body is smaller than the abundance ratio of the superabsorbent polymer in the unfolded portion. The base nonwoven fabric is an air-through nonwoven fabric, has a basis weight of 20 g/m ² or more and 120 g/m ² or less, and a thickness of 0.3 mm or more and 8.0 mm or less, and the thickness of the fibers constituting the base nonwoven fabric is , 1.8 dtex or more and 9.0 dtex or less. The absorbent article according to any one of claims 1 to 7, wherein the basis weight of the superabsorbent polymer is 150 g/m ² or more and 1000 g/m ² or less. 9. The pulp-containing nonwoven fabric according to any one of claims 1 to 8, wherein the pulp-containing nonwoven fabric is a composite nonwoven fabric obtained by entangling and integrating pulp fibers in a polypropylene spunbond nonwoven fabric having a basis weight of 40 g/m ² or more and 80 g/m ² or less. 1. The absorbent article according to item 1.