JP2023012791A - Underpants type absorbent article - Google Patents

Abstract

To provide an underpants type absorbent article excellent in elasticity, air permeability and external appearance.SOLUTION: An underpants type absorbent article 50 comprises: an exterior body 1 divided into an abdominal side part 2, a back side part 3 and a crotch part 4; and an absorber 51 supported mainly on the crotch part 4. The absorber 51 includes a top sheet 10, a back sheet 30 and an absorbent sheet 20 therebetween. The absorbent sheet 20 includes a hydrophilic nonwoven fabric 21 and a highly absorbent polymer layer 23, and has a pulp sheet 22 at the most non-skin side. The exterior body 1 includes a first nonwoven fabric 5 from the abdominal side part 2 through the crotch part 4 to the back side part 3, a second nonwoven fabric 5A arranged in areas of the abdominal side part 2 and the back side part 3 of the first nonwoven fabric 5, an elastic film 6 arranged between the first nonwoven fabric 5 and the second nonwoven fabric 5A, and a connection part 70 for connecting and integrating them. A waist gather part 7 disposed in a circumferential direction along a waist opening part 9A, and including an elastic extensible member is also provided.SELECTED DRAWING: Figure 2

Description

The present invention relates to pants-type absorbent articles.

Conventionally, various proposals have been made for pants-type absorbent articles. In Patent Document 1, an absorbent body and an outer body that supports the absorbent body are provided. Welded regions between the side edges and the side edges of the dorsal part, the welded joints forming the waist opening and the leg openings, and the peripheral edges of the waist opening and the leg openings and an elastic stretchable member that is disposed over substantially the entire circumference and forms a continuous gather, and the welded joint has a non-welded part having a length of 1 cm or more in the substantially central part in the width direction. is disclosed. It is described that the underpants-type absorbent article has a good fitting property while maintaining a good wearing feeling and texture (Paragraph 0022).

The aforementioned continuous gathers characterize the appearance of underpants-type absorbent articles such as disposable diapers, and bring about a large difference in appearance from undergarments made of cloth or the like. Continuous gathers, especially string rubber that can be seen through the waist and buttocks, and many large wrinkles around them are not present in cloth underwear. Such a difference in appearance is undesirable for wearers who do not want third parties to know that they are using underpants-type absorbent articles, and there is a demand for underpants-type absorbent articles having an appearance closer to that of cloth underwear. .

Composite sheets, which are laminates of a nonwoven fabric surface material and an elastic film, have been proposed as exterior bodies in order to improve the problem of the appearance of pants-type absorbent articles. Patent Document 2 discloses a breathable stretchable film containing one or more polymers selected from polyurethane, polyetheramide, and polyester elastomer, and a stretchable film bonded to the stretchable film in two directions perpendicular to each other. Disclosed is a stretchable composite sheet comprising a stretchable spunbond nonwoven fabric, which is a laminate having biaxial elastic stretchability and breathability, and diaper and personal care product outerwear using the stretchable composite sheet. body is disclosed.

In addition, in the pants-type absorbent article, an absorbent body that absorbs bodily fluids is fixed to the skin-side surface of the outer body so as to be in contact with the wearer's crotch region. However, conventional absorbent fiber-type absorbent bodies containing absorbent fibers such as fluff pulp and superabsorbent polymers (hereinafter also referred to as "SAP") have a relatively large thickness after one absorption of bodily fluids, The crotch region of the wearer becomes tight, and the feeling of wearing deteriorates, and it is not suitable for absorbing body fluids multiple times, which is the current trend of absorbent articles. Merely reducing the thickness of the absorbent fiber type absorber creates a gap between the absorber and the underbody portion of the outer body, making it easier for body fluids to leak out and lowering the body fluid absorption capacity. Therefore, the use of a thin absorbent sheet comprising two hydrophilic nonwoven fabrics and a superabsorbent polymer fixed between them with an adhesive has been investigated and various proposals have been made.

Patent Document 3 includes a first sheet, a second sheet arranged to face the first sheet, and an SAP arranged between the first sheet and the second sheet, and the first sheet is the second sheet. is an adhesive coated surface, the second sheet has an adhesive coated surface opposed to the first sheet, and the SAP is applied to the adhesive coated surface of the first sheet and / or the second sheet in the width direction The absorbent sheet is intermittently adhered in stripes to the absorbent body, and both sides in the width direction of the absorbent sheet are sealed by bonding the adhesive-applied surfaces of the first and second sheets to each other. According to Patent Literature 2, it is described that the absorbent performance of the absorbent can be ensured and the width of the absorbent can be reduced (paragraph 0012).

JP-A-10-137287 JP 2008-279774 A JP 2006-158676 A

When the stretchable composite sheet described in Patent Document 2 is used as an exterior body, when the entire surface of the absorber is fixed to the stretchable composite sheet by a conventional method, the portion where the absorber and the stretchable composite sheet are fixed (hereinafter simply “fixed Since the elastic film hinders breathability in the part (also referred to as "part"), it is easy to get stuffy when worn. In addition, the fixed portion becomes hard, and the feel of the pants-type absorbent article as a whole deteriorates. In addition, in order to improve breathability, it is conceivable to increase the number of fixed portions per unit area by interspersing small-area fixed portions instead of fixing the entire surface of the absorbent body. The problem that the feel of the exterior body becomes hard cannot be sufficiently solved.

Although the absorbent sheet described in Patent Document 3 is thin, the SAP absorbs and swells the body fluid the first time, causing gel blocking and clogging the passage of the body fluid, resulting in poor (slow) repeated absorption. There is a problem of becoming Furthermore, the dense arrangement of SAP in conventional absorbent sheets makes the absorbent sheet hard and reduces the feeling of wearing. Since the SAP does not have a function to instantaneously receive the body fluid before it begins to absorb the body fluid, the first body fluid cannot be absorbed, and there is also the problem of body fluid leakage and fluid return.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pants-type absorbent article which is excellent in stretchability, breathability and touch, has a good appearance, and prevents leakage of bodily fluids.

As a result of intensive research to solve the above problems, the present inventors have found that the outer body nonwoven fabric from the abdominal part (front body) to the crotch part and the back side (back body) of the outer body The regions corresponding to the side and back portions are configured like a stretchable composite film, and an absorbent body using an absorbent sheet having a predetermined structure is arranged in the region corresponding mainly to the crotch part of the outer nonwoven fabric. As a result, the inventors have found that a desired pants-type absorbent article can be obtained, and have completed the present invention. That is, the present invention relates to the following pants-type absorbent article.

(1) A pants-type absorbent article comprising an outer body divided into an abdominal part, a crotch part and a back part, and an absorbent body that is mainly supported by the crotch part of the outer body and absorbs body fluids. There is
The absorbent body includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent sheet disposed therebetween. A hydrophilic nonwoven fabric that diffuses in a direction and a superabsorbent polymer layer that absorbs body fluids, and has a pulp sheet that is positioned closest to the non-skin side of the wearer and temporarily retains body fluids,
The exterior body is
a first nonwoven fabric provided so as to extend from the ventral portion through the crotch portion to the dorsal portion;
a second nonwoven fabric arranged in regions corresponding to the ventral portion and the dorsal portion on both sides in the longitudinal direction of the first nonwoven fabric;
an elastic film disposed between the first nonwoven fabric and the second nonwoven fabric in regions corresponding to the ventral portion and the dorsal portion of the first nonwoven fabric;
a joining portion that joins and integrates the first nonwoven fabric, the elastic film and the second nonwoven fabric,
It further has waist gathers that are provided in the circumferential direction along a waist opening formed by joining both widthwise ends of the abdominal portion and both widthwise ends of the dorsal portion and that include an elastic stretchable member. , a pants-type absorbent article.
(2) The underpants-type absorbent article of (1) above, which has a boxer shorts-type appearance.
(3) The joint portion includes a plurality of small joint pieces that are separated from each other in the plane direction, and the small joint piece has a plan view shape including a corner portion derived from a quadrangle and a partial arc portion derived from a circle, The pants-type absorbent article according to (1) or (2) above.
(4) The sheet region in which the first nonwoven fabric, the elastic film, and the second nonwoven fabric are integrated by the joint portion has an air resistance value of 0.01 kPa when stretched 250% in the stretching direction. - The pants-type absorbent article according to any one of the above (1) to (3), which is in the range of s/m or more and 0.5 kPa·s/m or less.
(5) The sheet region obtained by integrating the first nonwoven fabric, the elastic film, and the second nonwoven fabric by the joining portion has an elongation rate in the stretching direction of 150% or more and 270% or less. The pants-type absorbent article according to any one of (1) to (4).
(6) The pants-type absorbent article according to any one of (1) to (5) above, wherein the number of elastic stretchable members is 3 or more and 8 or less.
(7) The absorbent sheet comprises, in order from the wearer's skin side, the first hydrophilic nonwoven fabric, the first superabsorbent polymer layer, the second hydrophilic nonwoven fabric, and the second superabsorbent polymer. , and the pulp sheet, the underpants-type absorbent article according to any one of the above (1) to (6).
(8) The absorbent sheet comprises, in order from the wearer's skin side, the first hydrophilic nonwoven fabric, the first superabsorbent polymer layer, the second hydrophilic nonwoven fabric, and the second superabsorbent polymer. , the third hydrophilic nonwoven fabric, the third superabsorbent polymer layer, and the second absorbent sheet in which the pulp sheet is superimposed, the pants type according to any one of the above (1) to (6) absorbent article.
(9) the absorbent sheet has embossed grooves extending from its skin-side surface to the skin-side surface of the pulp sheet;
The embossed grooves include a first embossed groove extending longitudinally in the widthwise center of the skin-side surface of the absorbent sheet, and a plurality of embossed grooves intersecting or contacting the first embossed grooves at an acute angle. The underpants-type absorbent article according to any one of (1) to (8) above, further comprising second embossed grooves.
(10) The absorbent according to (9) above, wherein the second embossed grooves are formed in an X shape in plan view on the skin-side surface of the absorbent sheet, and the intersection of the X characters is located on the first embossed grooves. sexual goods.
(11) The pants-type absorbent article according to any one of (1) to (10) above, wherein the absorbent sheet has a thickness of 0.5 mm or more and 5 mm or less.
(12) The above (1) to (11), wherein each of the hydrophilic nonwoven fabrics has a basis weight of 10 g/m ² or more and 40 g/m ² or less and a thickness of 0.05 mm or more and 0.3 mm or less. Any pant-type absorbent article.
(13) Any one of (1) to (12) above, wherein the pulp sheet has a basis weight of 10 g/m ² or more and 40 g/m ² or less and a thickness of 0.05 mm or more and 0.5 mm or less. A pants-type absorbent article.

ADVANTAGE OF THE INVENTION According to this invention, the pants|underpants type absorbent article which is excellent in stretchability, breathability, and a touch, has a favorable appearance, and is prevented from leaking bodily fluids is provided.

1 is a perspective view schematically showing the appearance of a pants-type absorbent article according to this embodiment. FIG. Fig. 2 is a schematic development view of the pants-type absorbent article shown in Fig. 1; 3 is a schematic cross-sectional view along the X ₁ -X ₁ cutting line of FIG. 2 in the width direction; FIG. FIG. 3 is a schematic cross-sectional view along the X ₂ -X ₂ cutting line of FIG. 2 in the width direction; FIG. 4 is a schematic plan view showing one embodiment of a joint. (a) shows the main dimensions of the joints, (b) shows the main angles at which the joints are arranged, and (c) shows the main arrangement patterns of the joints. It is a schematic diagram showing one embodiment of a manufacturing example of an exterior body. (a) is a schematic side view showing all the steps of the manufacturing method of the outer package. (b) is a schematic cross-sectional view showing an enlarged third step (bonding step). FIG. 6B is a perspective view schematically showing a transport state of the nonwoven fabric and the elastic film before the transport roll in the second step in the method for manufacturing the outer package shown in FIG. 6A. FIG. 4 is a schematic cross-sectional view showing the configuration of the absorbent sheet precursor before embossed grooves are formed. FIG. 4 is a cross-sectional view schematically showing the structure of another form of absorbent sheet precursor. FIG. 4 is a plan view schematically showing the configuration of embossed grooves in the absorbent sheet; 11 is a schematic cross-sectional view in the width direction of the absorbent sheet shown in FIG. 10. FIG. (a) is a schematic cross-sectional view taken along the X ₁ -X ₁ cutting line shown in FIG. 10, and (b) is a schematic cross-sectional view taken along the X ₂ -X ₂ cutting line shown in FIG.

In the present specification, wearing the pants-type absorbent article 50 refers to a state in which it is worn on the wearer's body, regardless of whether it is before or after absorption of bodily fluids. The longitudinal direction of the pants-type absorbent article 50 is the direction indicated by Y in the drawing that extends from front to back through the crotch of the wearer when the absorbent article 50 is worn, and the width direction is the longitudinal direction. The thickness direction is the direction indicated by X in the drawing, which is substantially orthogonal to the other, and the direction indicated by Z in the drawing, in which the constituent members are laminated. The skin-side surface of the pants-type absorbent article 50 and its constituent members is the surface that contacts the wearer's skin or the surface that faces the skin, and the non-skin-side surface is the surface that contacts the wearer's clothing or clothing. It is the surface facing the Body fluids refer to liquids excreted from the body to the outside of the body, such as water in urine, blood, and loose stools.

<Pants type absorbent article>
Hereinafter, the pants-type absorbent article 50 of this embodiment will be described with reference to the drawings. 1 to 5 show a pant-type absorbent article 50. FIG. 6 and 7 show a method of manufacturing a composite sheet that constitutes the outer body 1 of the pants-type absorbent article 50. FIG. 8 and 9 show absorbent sheet precursors 20A and 25A, respectively. 10 and 11 show the absorbent sheet 20. FIG. Each figure does not define the shape of the absorbent article 50 and each constituent member, the size relationship of the dimensions, and the like. The pants-type absorbent article 50 of this embodiment can be suitably used as a pants-type disposable diaper for infants, adults, and the elderly.

As shown in FIGS. 1 to 4, the underpants-type absorbent article 50 of the present embodiment includes an outer body 1 having a boxer shorts-type outer shape and an absorbent body that is mainly supported by the outer body 1 and absorbs body fluids. a body 51; The longitudinal dimension of the pants-type absorbent article 50 when unfolded as shown in FIG. 2 is, for example, in the range of 600 mm or more and 1000 mm or less, and the width direction dimension is in the range of, for example, 450 mm or more and 900 mm or less. In addition, the minimum width dimension of the crotch portion 4 when deployed, which will be described later, is derived from the planar view shape of the crotch portion 4 when deployed, which will be described later. be. The pants-type absorbent article 50 having the unfolded dimensions described above can be various sizes such as S size, M size, and L size, and the pants-type absorbent article 50 having no gathers on the external surface. In addition, even if the width dimension of the crotch portion 4 when unfolded is narrowed as described above, the outer shape of the underpants-type absorbent article 50 is a boxer shorts type that covers the underpants. In addition, the feeling of tightness in the crotch region of the wearer is alleviated, and the feeling of wearing is improved.

The underpants-type absorbent article 50 of the present embodiment is supported by an outer body 1 having a boxer shorts-type outer shape, and the skin-side surface of the outer body 1, and covers the wearer's crotch region from the front and back. and an absorbent body 51 having a belt-like shape. The exterior body 1 includes an abdominal portion 2 that mainly contacts the abdomen of the wearer, a dorsal portion 3 that mainly contacts the back of the wearer, and is positioned between the abdominal portion 2 and the dorsal portion 3. , a pair of concave portions 4A that are recessed inward in a U-shape from both widthwise edges of the abdominal portion 2 and the dorsal portion 3 and are opposed to each other in the widthwise direction; and Part 4. The outer body 1 supports the absorber 51 mainly on the skin-side surface of the crotch portion 4 , and the absorber 51 is arranged so that part or all of the absorber 51 overlaps the crotch portion 4 . The absorber 51 absorbs and retains body fluids of the wearer.

<Exterior body>
As shown in FIG. 2, the exterior body 1 of the present embodiment has an abdominal portion 2 and a dorsal portion 3 that are substantially symmetrical about an imaginary center line extending in the width direction from the center of the crotch portion 4 in the longitudinal direction. , the absorber 51 is also arranged substantially symmetrically with respect to the virtual center line. Then, the absorbent body 51 is folded in half along the virtual center line so that the waist opening 9A and the waist circumference opening 9A and the waist circumference opening 9A and the waist circumference opening 9A A pair of leg openings 9B are formed. Waist gathers 7 are provided in the circumferential direction around the waist opening 9A to prevent the pants-type absorbent article 50 from slipping down and give the pants-type absorbent article 50 an appropriate tightening feeling. An elastic stretchable member is disposed in the waist gathers 7, and the elastic stretchable member can be made of, for example, natural rubber, synthetic rubber, polyurethane, or the like, and can be thread-shaped, string-shaped, or belt-shaped. Although the number of elastic members to be arranged is not particularly limited, it is, for example, 3 or more and 8 or less. Appropriate tightening can be obtained by setting the number of bolts within the range described above.

The waist gathers 7 are provided along the waist opening 9A, the composite sheet 8 is arranged around the waist gathers 7, and when the pants-type absorbent article 50 is worn, the waist gathers 7 are stretched to some extent. Because of this state, it is difficult to form gathers around the waist gathers 7 . Further, in the conventional pants-type absorbent article, an elastic stretchable member is generally arranged around the leg openings 9B. The boxer shorts type covers the 9B, eliminates the gap between the absorbent body 51 and the leg openings 9B, and uses the highly elastic composite sheet 8 for the ventral part 2 and the dorsal part 3 to provide an elastic stretchable member. The feeling of support is improved without disposing the , gathers are hardly formed on the external surfaces of the abdominal part 2 and the back part 3, and the underpants-type absorbent article 50 can have an appearance almost the same as that of cloth underwear. Therefore, the possibility that others will recognize that you are wearing the pants-type absorbent article 50 is greatly reduced.

In addition, as shown in FIGS. 2 to 4, the outer body 1 of the present embodiment includes a first nonwoven fabric 5 provided so as to extend from the abdominal portion 2 to the back portion 3 via the crotch portion 4, A second nonwoven fabric 5A arranged in regions corresponding to the ventral part 2 and the dorsal part 3 on both sides in the longitudinal direction of the first nonwoven fabric 5, and corresponding to the ventral part 2 and the dorsal part 3 of the first nonwoven fabric 5. In the region where the and a joining portion 70 that converts. That is, in the present embodiment, the ventral part 2 and the dorsal part 3 are formed by laminating the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A in this order, and joining them by the joining part 70 to integrate them. The crotch part 4 is composed only of the first nonwoven fabric 5 . In addition, the first nonwoven fabric 5 may be arranged on either the skin side or the non-skin side, and may be arranged between a plurality of nonwoven fabrics.

In this specification, integration of the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A means that the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A adhere to each other, and at least This adhesion is maintained until the pants-type absorbent article 50 is consumed. The joint portion 70 has a predetermined planar shape, which will be described later. Further, for the integration of the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A, for example, a method such as heat fusion, ultrasonic fusion, or hot-melt adhesive is used. By using these methods, the predetermined joint portion 70 can be easily formed. The integration method will also be described later.

According to the exterior body 1 of the present embodiment, the ventral portion 2 and the dorsal portion 3 are composed of the above-described composite film 8 having high elasticity and rigidity, and the crotch portion 4 is composed of the first nonwoven fabric 5. The stretchability and rigidity of the pants-type absorbent article 50 as a whole are maintained, and the breathability of the crotch part 4 is remarkably improved. can get. In addition, since the composite sheet 8 is used for the ventral portion 2 and the dorsal portion 3, and the composite sheet 8 contains the elastic film 6 made of resin, a relatively narrow side seal portion 80 is formed. However, since the side seal portions 80 have a bonding strength that causes no problem in use, the appearance of the underpants-type absorbent article 50 can be brought closer to that of cloth underwear.

The composite sheet 8 is not limited to this embodiment, and includes two or more first nonwoven fabrics 5, two or more elastic films 6 arranged between the first nonwoven fabrics 5, and two or more second nonwoven fabrics 5. A laminate sheet obtained by integrating a laminate with the nonwoven fabric 5A of No. 2 by a joint portion 70 may also be used. The three-dimensional shape of the composite sheet 8 may be, for example, a three-dimensional shape having a layered shape extending in one direction when viewed in cross section and a flat surface, or a three-dimensional shape having a wavy line shape extending in one direction when viewed in cross section and having regular irregularities on the surface. A three-dimensional shape in which is present, and the like. The latter three-dimensional shape is preferable from the viewpoint of texture, touch, cushioning properties, and the like.

(non-woven fabric)
As the first nonwoven fabric 5 and the second nonwoven fabric 5A, nonwoven fabrics conventionally used for the exterior body 1 can be used without particular limitation. Each of the first nonwoven fabric 5 and the second nonwoven fabric 5A may be one sheet or a plurality of sheets. In a preferred embodiment, a spunbond nonwoven fabric composed of synthetic fibers made of one or more thermoplastic resins selected from polypropylene, polyester, polyethylene and the like is used. When using these nonwoven fabrics, the basis weight is, for example, in the range of 10 g/m ² or more and 40 g/m ² or less, 15 g/m ² or more and 40 g/m ² or less, or 18 g/m ² or more and 40 g/m ² . The range is as follows.

In a more preferred embodiment, the first nonwoven fabric 5 forming the crotch portion 4 is a spunbond nonwoven fabric, and the number of first nonwoven fabrics 5 in the crotch portion 4 is one. According to this embodiment, stuffiness and cramped feeling in the crotch area when worn can be reduced, and the absorber 51 can be securely held. The basis weight of the spunbond nonwoven fabric in this embodiment is, for example, within the range of 10 g/m ² or more and 30 g/m ² or less. If the basis weight is less ^than 10 g/m ² , the rigidity of the spunbond nonwoven fabric itself and thus the productivity tends to decrease. .

(elastic film)
The elastic film 6 is contained in the composite sheet 8 in a state of being stretched in the direction of stretching (a state in which the rate of elongation in the direction of stretching is within a predetermined range). The elastic film 6 is not particularly limited as long as it has elasticity, but a film made of a synthetic resin that exhibits elasticity when formed into a film is preferable. Examples of the synthetic resin include polyester-based elastomers, polyolefin-based elastomers, polyurethane-based resins, polyamide-based resins, and alloys of two or more of these. Among these, films containing polyurethane-based resins are preferable, and films made of polyurethane-based resins are more preferable, from the viewpoint of cost and stretchability. From the viewpoint of obtaining a composite sheet 8 having a predetermined airflow resistance value and elongation in the direction of stretching, the thickness of the elastic film 6 is, for example, in the range of 8 μm or more and 40 μm or less, and the elongation in the direction of stretching of the elastic film 6 is, for example, 100%. The range is 350% or less. The elastic film 6 having such thickness and elongation in the stretching direction can be appropriately selected from various commercially available products.

(joint)
The joining portion 70 joins the first nonwoven fabric 5 , the elastic film 6 , and the second nonwoven fabric 5</b>A partially or entirely to form a composite sheet 8 . The joint 70 is interposed between the first nonwoven fabric 5 and the elastic film 6 and between the second nonwoven fabric 5A and the elastic film 6,
To join wholly or partially in the plane direction. However, when the composite sheet 8 is entirely joined in the plane direction, the resulting composite sheet 8 tends to have lower stretchability, air permeability, and the like. By arranging the plurality of joint pieces 71 so as to be separated from each other in the plane direction, the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A are formed at the positions where the joint pieces 71 are arranged. Join partially.

In a more preferred embodiment, the plurality of joining pieces 71 are spaced apart from each other in the planar direction and have a predetermined plan view shape. The shape in plan view includes, for example, a circle, a square, a triangle, a combination of two or more thereof, one or more corners (right-angled portions) derived from a quadrangle, and one or more partial arcs derived from a circle. and a complex shape having and the like. In a more preferable embodiment (hereinafter also referred to as "Embodiment A"), from the viewpoint of the breathability, stretchability, etc. of the composite sheet 8, among the above-described shapes in plan view, a composite shape having corners and partial arc portions is used.

More specifically, as shown in FIG. 5, the joining piece 71 of Embodiment A described above has a rectangular shape elongated in one direction, and two long sides of the rectangular shape facing each other in the width direction have arcuate projections. It has a plan view shape that protrudes outward. This plan view shape has four corners and two partial arcs. The composite sheet 8 integrated with the plurality of joint pieces 71 having such a planar shape has a good airflow resistance value, very high air permeability, good stretchability, and moderate mechanical strength and Since it also has tightening properties, it becomes more unnecessary to dispose the elastic stretchable member in conspicuous areas such as the periphery of the leg openings 9B, and continuous gathers are not formed on the outer surface of the pants-type absorbent article 50. It is very suitable as the exterior body 1 of.

As shown in FIG. 5, the joining piece 71 of Embodiment A described above has a shape in which a rectangle 75 extending perpendicular to the stretching direction Y of the composite sheet 8 and a circle 76 are integrated. The intersection of the diagonal lines coincides (overlaps) with the center of the circle 76, and the diameter of the circle 76 is longer than the short side of the quadrangle 75 and shorter than the long side. The joining piece 71 has four corners derived from a square 75 and two partial arc-shaped projections derived from a circle 76. One of the partial arc-shaped projections extends in one and the other protrude in the other direction of the expansion/contraction direction Y (FIG. 5(a)). The joint piece 71 has a rectangular 75 portion extending in a direction substantially orthogonal to the expansion/contraction direction Y (the inclination angle with respect to the orthogonal direction is 0°), but is not limited thereto, and the rectangular 75 portion extends with respect to the orthogonal direction. may be inclined at angles such as 45°, 90°, and 135° (Fig. 5(b)). Such joining pieces 71 are arranged in a predetermined pattern along the stretching direction of the composite sheet 8 . The pattern is, for example, a combination of an X arrangement and a Y arrangement, as shown in FIG. 5(c). The X arrangement and the Y arrangement are alternately arranged one by one in the direction perpendicular to the stretching direction to form an arrangement pattern. The X arrangement includes the X1 arrangement, the X2 arrangement, and the like, and the Y arrangement includes the Y1 arrangement, the Y2 arrangement, and the like. The X1 arrangement and the X2 arrangement are obtained by regularly shifting the phases in the stretching direction. Similarly, the Y1 arrangement and the Y2 arrangement are obtained by regularly shifting the phases in the stretching direction. Each of the X arrangement and the Y arrangement may be used alone, or two or more of them may be used in combination as shown in FIG. 5(c).

In FIG. 5, an example of each dimension of the joint piece 71 is shown. is in the range of, for example, 0.2 mm or more and 0.4 mm or less, and the dimension of the joining piece 71 in the direction substantially orthogonal to the expansion/contraction direction Y of the joint piece 71 indicated by symbol "B" is, for example, 0.8 mm or more and 2.0 mm or less. The diameter of the circle 41 of the joining piece 71, which is the range and is indicated by the symbol "C", is, for example, in the range of 0.3 mm or more and 0.8 mm or less.

Also, in FIG. 5(c), in the arrays X1 and X2, the joint piece 71 having an inclination angle of 0 degrees in the expansion/contraction direction is adjacent to the joint piece 71 described above and having an inclination angle of 90 degrees in the expansion/contraction direction. The shortest distance D1 in the stretching direction with a joint piece 71 is, for example, 1.0 mm or more and 3.0 mm or less when the composite sheet 8 is stretched 250% in the stretching direction Y. The shortest distance D2 in the stretching direction between the joining piece 71 having an inclination angle of 135° in the direction and the joining piece 71 having an inclination angle of 45° in the stretching direction is the composite sheet 8 in the stretching direction Y. When stretched by 250%, the joint piece 71 has a range of, for example, 2.0 mm or more and 5.0 mm or less. The shortest distance D3 in the direction perpendicular to the expansion/contraction direction to the joining piece 71 having an inclination angle of 135° is, for example, in the range of 1.0 mm or more and 3.0 mm or less. By setting the dimensions of the joint pieces 71 and the shortest distance between the joint pieces 71 within the ranges described above, the composite sheet 8 is further improved in breathability, and the decrease in durability of the elastic film 6 is mitigated.

According to Embodiment A, for example, the composite sheet 8 having the following physical properties such as airflow resistance, elongation in the direction of elongation, elongation load, elongation at break, and adhesion area ratio can be obtained.

(Ventilation resistance value)
The composite sheet 8 has an airflow resistance value measured after being stretched by 250% in the direction of expansion and contraction, in the range of 0.01 kPa s/m or more and 0.5 kPa s/m or less, preferably 0.05 kPa s/m. m or more and 0.35 kPa·s/m or less. Since the composite sheet 8 has the airflow resistance value described above, even if the absorber 51 is fixed to the skin side surface of the crotch part 4, the composite sheet 8 constituting the ventral part 2 and the back part 3 provides good ventilation. sex is preserved. If the airflow resistance value is less than 0.01 kPa·s/m, the heat retention of the pants-type absorbent article 50 tends to decrease, and the feeling of wearing tends to decrease. If the airflow resistance value exceeds 0.5 kPa·s/m, the pants-type absorbent article 50 tends to have low breathability and become stuffy when worn.

(Elongation in stretching direction)
The composite sheet 8 has an elongation rate in the stretching direction, for example, in the range of 150% or more and 270% or less, or in the range of 160% or more and 260% or less. Here, the elongation rate in the stretching direction is the ratio of the length increased by stretching to the natural length in the non-stretching state. The elongation rate can be measured, for example, using an autograph manufactured by Shimadzu Corporation. Since the composite sheet 8 has an elongation rate in the expansion/contraction direction within the above-mentioned range, it is easy for the wearer to put on and take off, has a suitable tightness and is comfortable to wear, and is less likely to slip off, giving a sense of security. A pants-type absorbent article 50 is obtained.

(Stretching load)
The composite sheet 8 has an elongation load when stretched 120% in the stretch direction, for example, in the range of 0.8 N/50 mm or more and 2.0 N/50 mm or less, and the stretch load when stretched 150% in the stretch direction. is, for example, in the range of 2.0 N/50 mm or more and 3.5 N/50 mm or less. Since the elongation rate varies depending on the body type of the wearer, the elongation loads of 120% and 150% were specified. By doing so, the fit does not vary depending on the body type. In addition, the composite sheet 8 has an elongation rate in the stretching direction of 200% or more and 270% or less. As a result, the pants-type absorbent article 50 can be easily stretched by 200% or more compared with the conventional one, so that the pants-type absorbent article 50 can be easily put on and taken off by the wearer. Here, the elongation rate in the stretching direction is the ratio of the length increased by stretching to the natural length in the non-stretching state, as in the case of stretching 120% in the stretching direction. The extension load can be measured using, for example, an autograph manufactured by Shimadzu Corporation.

(Breaking elongation)
The breaking seismic coefficient of the composite sheet 8 is, for example, in the range of 210% or more and 280% or less in the stretching direction. The breaking elongation is defined as L1 being the length of the composite sheet 8 in its natural length in a non-stretchable state and L2 being the length when the composite sheet 8 is stretched in the stretching direction and broken. (L2/L1)×100(%). When the breaking elongation is within the above range, even if the pants-type absorbent article 50 is widened when putting on and taking off, it is difficult to stretch or tear. The elongation at break can be measured, for example, using an autograph manufactured by Shimadzu Corporation.

(adhesion area ratio)
In the composite sheet 8, the bonding area ratio of the joint portion 70 as a whole is, for example, in the range of 4% or more and 18% or less. Here, the adhesive area ratio is the percentage of the total area of the joint pieces 71 existing in the unit area of the composite sheet 8 per unit area. If the adhesion area ratio is less than 4%, the composite sheet 8 tends to have low breathability. On the other hand, when the adhesive area ratio exceeds 18%, the strength of the composite sheet 8 tends to decrease.

(Manufacturing method of exterior body)
The exterior body 1 including the composite sheet 8 of Embodiment A can be produced, for example, by the manufacturing method shown in FIG. 6A and 6B are diagrams schematically showing a method of manufacturing the exterior body 1 including the composite sheet 8. FIG. FIG. 6(a) is a schematic side view showing all the steps of the manufacturing method of the exterior body 1 including the composite sheet 8. FIG. FIG. 6B is a schematic cross-sectional view showing an enlarged view of the third step (bonding step). The manufacturing method shown in FIG. 6 is a method using ultrasonic bonding or heat bonding, and includes first to third steps in this order. FIG. 7 shows the first nonwoven fabric 5, the second nonwoven fabric 5A (in the figure, for example, 5A·L corresponds to the ventral part 2 and 5A·R corresponds to the dorsal part 3), and stretchable 2 shows a state in which the elastic film 6 (eg, 6L in the figure corresponds to the ventral side 2 and 6R corresponds to the dorsal side 3) is conveyed to the first and second joining rollers 53 and 54. FIG.

In the first step, a roller around which the first nonwoven fabric 5 is wound is installed as the feeding roller 52 positioned relatively upward in FIG. The width dimension of the first nonwoven fabric 5 substantially matches the longitudinal dimension of the exterior body 1 to be obtained. Two rollers around which the second nonwoven fabric 5A is respectively wound are installed as feed rollers 52 positioned relatively lower in FIG. The width dimension of each nonwoven fabric 5A substantially matches the longitudinal dimension of the ventral side portion 2 and the dorsal side portion 3 of the exterior body 1 to be obtained. The two rollers around which the elastic film 6 is respectively wound are installed as feed rollers 51 positioned between the two feed rollers 52 in FIG. Each elastic film 6 has a width dimension substantially matching the longitudinal dimension of the ventral side portion 2 and the dorsal side portion 3 of the exterior body 1 to be obtained. The nonwoven fabric 5, the elastic film 6, and the nonwoven fabric 5A are continuously conveyed from the feed roller 51 or the feed roller 52 toward the first and second joining rollers 53 and 54 while applying a predetermined tension. be done. In particular, the stretchable film 6 is conveyed while being stretched in the conveying direction by a predetermined tension. The tension applied to the stretchable film 6 is, for example, tension that stretches the stretchable film 6 by 200% or more, more preferably by 250±30%. Note that the positional relationship between the feeding rollers 51 and 52 is not limited to this description and FIG.

In the second step following the first step, the first nonwoven fabric 5 and the second nonwoven fabric 5A respectively wound around the two feeding rollers 52 are laminated above and below the elastic film 6 conveyed in a stretched state, A laminate before integration is obtained. At this time, the second nonwoven fabric 5A and the elastic film 6 are configured so that their widthwise dimensions are substantially equal, and the second nonwoven fabric 5A and the elastic film 6 are formed from the ventral part 2 and the back of the nonwoven fabric 5, respectively. Each region corresponding to the side portion 3 is laminated.

In the third step following the second step, the unintegrated laminate obtained in the second step is passed through the pressure contact portions (hereinafter also referred to as "nip portions") of the first and second joining rollers 53 and 54. The composite sheet 8 is formed in each area corresponding to the ventral side portion 2 and the dorsal side portion 3 by integrating so as to form a predetermined joint piece 71 by pressing. The first joining roller 53 has a circumferential surface provided with a plurality of recesses 55 extending in the width direction and having predetermined dimensions and internal spatial shapes at predetermined intervals in the circumferential direction. The second joining roller 54 has, on its peripheral surface, a convex portion extending in the width direction and having a predetermined dimension and a predetermined three-dimensional shape (a three-dimensional shape whose tip portion can be inserted into the concave portion 55 with the laminate interposed therebetween). A plurality of 56 are provided at predetermined intervals in the circumferential direction. The first and second joining rollers 53 and 54 are engaged with each other so that the tip portion of the projection 56 can be inserted into the recess 55, and are pressed against each other with a predetermined pressure. At the nip portion of the first and second joining rollers 53 and 54, seal lines substantially continuous in the width direction of the peripheral surfaces of the rollers are formed at intervals of 0.5 mm or more and 2.0 mm or less in the expansion/contraction direction. there is Either or both of the first and second bonding rollers 53 and 54 are equipped with an ultrasonic wave generator or a heating device so that ultrasonic waves can be applied to the inner wall surface of the concave portion 55 or at least the tip portion of the convex portion 56. Or it is configured to be heatable.

In the third step, the unintegrated laminate obtained in the second step is passed through the nip portion of the first and second joining rollers 53 and 54 under pressure, and the inner wall surface of the concave portion 55 and the convex portion 56 are separated from each other. A plurality of joints 71 having a predetermined planar shape are formed by applying ultrasonic waves or heating the seal line that is a contact point with the tip portion of the first nonwoven fabric 5, the elastic film 6, and the second nonwoven fabric 5A are integrated by a plurality of joints 71 to obtain a composite sheet 8 with few wrinkles on the surface and having a smooth touch. That is, a plurality of joints 71 having a planar shape shown in FIG. 5 are formed at predetermined intervals shown in FIG. 5, and the first nonwoven fabric 5, the elastic film 6 and the second nonwoven fabric 5A are integrated, A longitudinal continuum of the outer body 1 is obtained, in which the composite sheet 8 is formed in the regions corresponding to the ventral part 2 and the dorsal part 3 . By cutting the obtained continuous body of the exterior body 1 in the width direction of the continuous body at the boundary between one exterior body 1 and another exterior body 1 adjacent thereto, the exterior body 1 is obtained.

<Absorber>
As shown in FIGS. 2 and 3, the absorbent body 51 is mainly supported by the skin-side surface of the first nonwoven fabric 5 in the crotch part 4 and is positioned on the skin side, and consists of a liquid-permeable top sheet 10 and a top. A liquid-impermeable back sheet 30 arranged opposite to the sheet 10 and positioned on the non-skin side, a second sheet 60 arranged between the top sheet 10 and the absorbent sheet 20, the second sheet 60 and the back sheet 30. and a pair of three-dimensional gathers 40 provided on the skin-side surface of the top sheet 10. - 特許庁The absorber 51 may be detachably provided mainly on the skin-side surface of the crotch part 4 of the outer body 1 . The absorbent sheet 20 includes, in order from the wearer's skin side, a first hydrophilic nonwoven fabric 21, a first superabsorbent polymer layer (hereinafter also referred to as "SAP layer") 23, a second hydrophilic nonwoven fabric 21, a second 2 and the pulp sheet 22 (FIG. 8), and the embossed grooves 15 extending from the skin side surface of the absorbent sheet 20 to the surface of the pulp sheet 22 or its vicinity are formed in a predetermined plan view shape. It is

According to the absorbent body 51 of this embodiment shown in FIG. 3, firstly, while maintaining the advantage of the thinness of the absorbent sheet 20, by providing a plurality of thin SAP layers 23, each layer is gel blocking. It improves the body fluid absorption capacity while preventing the superabsorbent polymer 12, prevents the development of hardness due to the superabsorbent polymer 12, improves the wearing comfort of the absorbent body 51, and By arranging the pulp sheet 22 on the skin side, body fluid leakage and liquid return are prevented. As a result, the body fluid diffusibility of the entire absorbent sheet 20 is improved, and the absorption speed and the absorption speed are maintained at a high level even after absorbing body fluid a plurality of times.

The absorbent body 51 has the top sheet 10, the absorbent sheet 20, and the back sheet 30 as basic structural units. Various known modifications such as the arrangement of the second seat 60 can be added. Hereinafter, the constituent members of the absorbent body 51 of this embodiment will be described in more detail in the order of the top sheet 10, the second sheet 60, the absorbent sheet 20, the back sheet 30, and the three-dimensional gathers 40. FIG.

(top sheet)
The top sheet 10 is, for example, a liquid-permeable sheet material that allows body fluids to quickly permeate and spreads the body fluids in the thickness direction and surface direction with respect to the second sheet 60 . The top sheet 10 is preferably made of a sheet material that has a soft feel and does not irritate the wearer's skin, so that it may come into direct contact with the wearer's skin. Examples of the sheet material include hydrophilic sheets, composite sheets that are laminates of hydrophilic sheets of the same or different types, perforated films such as perforated polyethylene films, foamed films such as polyethylene foams and urethane foams, and the like. be done. Hydrophilic sheets include, for example, air-through nonwoven fabrics, thermal bonded nonwoven fabrics, spunlace nonwoven fabrics, and the like, which are made using synthetic fibers made of synthetic resins such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton. A spunbond nonwoven fabric etc. are mentioned. Among these, nonwoven fabrics are preferred.

The surface of the top sheet 10 may be embossed or perforated from the viewpoint of improving liquid permeability. From the viewpoint of reducing irritation to the skin, the top sheet 10 may contain one or more of lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizers, and the like. The basis weight of the top sheet 10 is, for example, in the range of 15 g/m ² or more and 40 g/m ² or less from the viewpoint of strength, workability, and liquid return amount. The shape of the top sheet 10 is not particularly limited as long as it covers part or all of the absorbent sheet 20 required to guide bodily fluids to the absorbent sheet 20 without leakage.

(second seat)
The second sheet 60 is arranged on the non-skin side of the top sheet 10 , more specifically between the top sheet 10 and the absorbent sheet 20 . By arranging the second sheet 60, the cushioning property is increased, the fitting property and the wearing feeling are improved, and the body fluids permeating through the top sheet 10 can be almost uniformly diffused over the entire absorbent sheet 20.例文帳に追加

For the second sheet 60 , for example, a bulky nonwoven fabric is used that has a faster permeation rate of body fluids than the top sheet 10 and quickly diffuses body fluids into the absorbent sheet 20 . The nonwoven fabric is preferably an air-through nonwoven fabric, a spunbond nonwoven fabric, or the like. The thickness of the second sheet 60 is, for example, in the range of 0.1 mm or more and 4 mm or less, and its basis weight is, for example, in the range of 20 g/m ² or more and 60 g/m ² or less, or in the range of 22 g/m ² or more and 37 g/m ² or less. is. If the thickness is less than 0.1 mm, or the basis weight is less than 20 g/m ² or greater than 60 g/m ² , body fluids will not sufficiently diffuse over the entire skin-side surface of the absorbent sheet 20, and the absorbent body 51 will not be worn. Sensitivity tends to decrease. Moreover, the shape of the second sheet 60 is not particularly limited, but in a preferred embodiment, it is a shape that can completely cover the skin-side surface of the absorbent sheet 20 .

(absorbent sheet)
The absorbent sheet 20 may be detachably attached to the exterior body 1 . The longitudinal dimension (maximum length) of the absorbent sheet 20 is, for example, 100 mm or more and 800 mm or less, 150 mm or more and 500 mm or less, or 270 mm or more and 500 mm or less. The widthwise dimension (maximum width) of the absorbent sheet 20 is, for example, in the range of 50 mm or more and 105 mm or less. Further, when the absorbent sheet 20 has an hourglass shape in plan view, the longitudinal dimension is, for example, in the range of 180 mm or more and 800 mm or less, and is supported by the ventral portion 2 and the dorsal portion 3 of the exterior body 1. The widthwise dimensions of the regions are both in the range of, for example, 60 mm or more and 400 mm or less, and the widthwise dimension of the region supported by the crotch portion 4 of the exterior body 1 is in the range of, for example, 90 mm or more and 250 mm or less. Examples of the planar shape of the absorbent sheet 20 include an hourglass shape, an I shape, a rectangle, a square with rounded corners, and an ellipse. Moreover, the thickness of the absorbent sheet 20 is, for example, in the range of 0.5 mm or more and 5 mm or less.

The absorbent sheet 20 includes a hydrophilic nonwoven fabric 21 that diffuses bodily fluids in the plane direction and the thickness direction, and a superabsorbent polymer layer 23 that absorbs bodily fluids and is supported by the hydrophilic nonwoven fabric 21 . It has a pulp sheet 22 on the side that temporarily retains body fluids when they are discharged, and does not contain absorbent fibers. Specific examples of the absorbent sheet 20 of this embodiment include an absorbent sheet precursor 20A shown in FIG. 8 and an absorbent sheet precursor 25A shown in FIG. This embodiment also includes an embodiment in which embossed grooves 15, which are grooves extending from the skin-side surface of the absorbent sheet precursors 20A and 25A to the skin-side surface of the pulp sheet 22 or its vicinity, are formed. The embossed grooves 15 will be described later.

The absorbent sheet precursor 20A shown in FIG. and a pulp sheet 22 are superimposed to form an absorbent sheet. The absorbent sheet precursor 25A shown in FIG. 9 includes, in order from the wearer's skin side, the first hydrophilic nonwoven fabric 21, the first SAP layer 23, the second hydrophilic nonwoven fabric 21, and the second SAP layer. 23 , a third hydrophilic nonwoven fabric 21 , a third SAP layer 23 and a pulp sheet 22 are laminated to form an absorbent sheet. For example, the superabsorbent polymer 12 is adhered to the first, second and third SAP layers 23 with a hot-melt adhesive.

(hydrophilic nonwoven fabric)
The first, second, and third hydrophilic nonwoven fabrics 21 diffuse body fluids in, for example, the surface direction and the thickness direction of the absorbent sheet 20 . As the hydrophilic nonwoven fabric 21, a hydrophilic nonwoven fabric that is excellent in diffusing body fluids can be used without particular limitation. A spunbond nonwoven fabric etc. are mentioned. Among these, from the viewpoint of thinning the absorbent sheet 20 or the absorbent sheet precursors 20A and 25A, for example, a spunbond nonwoven fabric is used. The basis weight of the hydrophilic nonwoven fabric 21 is, for example, in the range of 10 g/m ² or more and 40 g/m ² or less. The thickness of the hydrophilic nonwoven fabric 21 is, for example, in the range of 0.05 mm or more and 0.3 mm or less. For the first, second, and third hydrophilic nonwoven fabrics 21, hydrophilic nonwoven fabrics of the same type or different types can be used.

(pulp sheet)
The pulp sheet 22 is positioned closest to the non-skin side of the absorbent sheet 20 or the absorbent sheet precursors 20A and 25A, and supports, for example, the second or third SAP layer 23, and is used when bodily fluids are discharged. , before the superabsorbent polymer 12 starts absorbing the body fluid, it temporarily stores and holds the body fluid, and prevents the occurrence of body fluid leakage, fluid return, and the like. Since the pulp sheet 22 retains body fluid faster than the superabsorbent polymer 12 absorbs body fluid, when the superabsorbent polymer 12 starts absorbing body fluid, the body fluid retained in the pulp sheet 22 becomes highly absorbent. Absorbed in polymer 12 . The pulp sheet 22 is not particularly limited as long as it is a sheet containing pulp fibers (cellulose fibers). Examples include crepe paper made of cellulose fibers, crepe paper containing a wet paper strength agent, tissue, tissue entangled with cellulose fibers, and the like. is mentioned. From the viewpoint of sufficiently exhibiting the above functions of the pulp sheet 22, the basis weight of the pulp sheet 22 is, for example, in the range of 10 g/m ² or more and 30 g/m ² or more, and the thickness is, for example, 0.05 mm or more. It is in the range of 0.2 mm or less.

(super absorbent polymer)
The superabsorbent polymer 12 used for each of the first, second, and third SAP layers 23 is not particularly limited as long as it can absorb body fluids and prevent backflow. Examples include aspartate, (starch-acrylic acid) graft copolymer, (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer and saponified products thereof. Among these, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred, from the viewpoint of absorption per weight. The superabsorbent polymer 12 can be used individually by 1 type or in combination of 2 or more types.

The superabsorbent polymer 12 is used, for example, in the form of particles, fibers, etc., but is preferably used in the form of particles from the viewpoint of ease of handling. At this time, by avoiding the use of a fine powder superabsorbent polymer 12 with poor fluidity as a powder and using a superabsorbent polymer 12 having a medium particle size, the basic performance related to absorption is improved and the absorption It is possible to reduce the rugged feeling caused by hardening after the adhesive sheet 20 absorbs body fluids. The median particle size of the superabsorbent polymer 12 is, for example, in the range of 50 μm or more and 600 μm or less or in the range of 100 μm or more and 500 μm or less.

From the viewpoint of preventing gel blocking, the basis weight of the superabsorbent polymer 12 in the first, second, and third SAP layers 23 is, for example, in the range of 150 g/m ² or more and 800 g/m ² or less, or It is in the range of 200 g/m ² or more and 700 g/m ² or less. By setting the basis weight of SAP within the numerical range described above, gel blocking in the first, second, and third SAP layers 23 can be prevented, and the absorbent sheet 20 can have a soft feel. . Also, the thickness of the first, second, and third SAP layers 23 is, for example, in the range of 0.5 mm or more and 10.0 mm or less or in the range of 0.5 mm or more and 6.0 mm or less. The basis weight and thickness of the first, second, and third SAP layers 23 may be the same or different.

As the hot melt adhesive used for fixing the superabsorbent polymer 12 in the first, second, and third SAP layers 23, those having a melting point of 100° C. or higher and 180° C. or lower can be used without any particular limitation. Examples thereof include synthetic rubber hot melt adhesives such as styrene-butadiene-styrene copolymers and styrene-isoprene-styrene copolymers, and olefin hot melt adhesives such as ethylene-vinyl acetate copolymers. . As a method for applying the hot melt adhesive, known methods such as a curtain coating method and a spiral method in which the molten hot melt adhesive 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. The content of the hot-melt adhesive is, for example, in the range of 10 g/m ² or less from the viewpoint of not impairing the absorbency of the super-absorbent polymer 12 and the touch when worn.

<Method for producing absorbent sheet precursor>
20 A of absorbent sheet precursors can be manufactured according to a well-known method. As a manufacturing method, for example, a hot-melt adhesive is applied to the non-skin side surface of the first hydrophilic nonwoven fabric 21, and a predetermined amount of the superabsorbent polymer 12 is dispersed to form the first SAP layer 23. In the first step, the second hydrophilic nonwoven fabric 21 is superimposed on the first SAP layer 23 (non-skin side surface), and the non-skin side surface of the second hydrophilic nonwoven fabric is applied in the same manner as in the first step. a second step of forming the second SAP layer 23 by pressing, and a third step of overlapping the pulp sheet 22 on the second SAP layer 23 (non-skin side surface) to obtain the absorbent sheet precursor 20A. A manufacturing method comprising: If necessary, the absorbent sheet precursor 20A may be subjected to pressure treatment or pressure heat treatment. The absorbent sheet 20 used in this embodiment is obtained by embossing the absorbent sheet precursor 20A. The absorbent sheet precursor 25A can also be produced in the same manner.

(embossed groove)
The skin-side surface of the absorbent sheet 20 is provided with first embossed grooves that extend from the skin-side surface to the skin-side surface of the pulp sheet 22 or its vicinity and that extend longitudinally in the center of the skin-side surface in the width direction. Embossed grooves 15 may be formed having grooves 16 and second embossed grooves 17 including a plurality of embossed grooves that intersect or touch the first embossed grooves 16 at acute angles. A specific example of such an embossed groove 15 is, for example, the embossed groove 15 shown in FIG. The embossed grooves 15 shown in FIG. 10 are the first embossed grooves 16 extending longitudinally in the center of the width direction of the skin-side surface of the absorbent sheet 20, and the absorbent sheet 20 provided on the skin-side surface of the absorbent sheet 20 in an X shape in plan view. and a second embossed groove 17 in which the X-shaped intersection point is positioned on the first embossed groove 16 . 10, only the first embossed grooves 16 can be confirmed as shown in FIG. 11(a) in the X ₁ -X ₁ cross section of FIG. 10, and in the X ₂ -X ₂ cross section of FIG. 10, FIG. 2, it can be confirmed that the second embossed grooves 17 are arranged on both sides of the first embossed grooves 16 in the width direction. The embossed grooves 15 can be formed on the skin-side surface of the absorbent sheet 20 using, for example, heat embossing, ultrasonic embossing, high-frequency embossing, or the like.

In the present embodiment, the width dimension of the opening of the first embossed groove 16 (hereinafter also simply referred to as "the width dimension of the first embossed groove 16") is the width dimension of the opening of the second embossed groove 17. (hereinafter simply referred to as "the width dimension of the second embossed groove 17") is formed to be slightly larger or the same width, for example, the width dimension of the first embossed groove 16 is in the range of 3 mm or more and 8 mm or less, The width dimension of the second embossed groove 17 is in the range of 3 mm or more and 8 mm or less.

Moreover, in this embodiment, the plurality of second embossed grooves 17 are arranged in the longitudinal direction of the absorbent sheet. That is, three X-shaped second embossed grooves 17 are longitudinally aligned with the intersection of said Xs on the line (first embossed groove 16). The number of second embossed grooves 17 is not limited to that of the present embodiment, and may be one or more. In a preferred embodiment, the distance V (FIG. 5) between one second embossed groove 17 and another adjacent second embossed groove 17 may be 0 mm, and when they are separated from each other, For example, it is in the range of 0 mm or more and 20 mm or less. If V is larger than 20 mm, the second embossed grooves 17 are too far apart in the longitudinal direction, and there is a tendency that improvement in body fluid diffusibility is not sufficient.

In another preferred embodiment, two lines A extending in the width direction from both ends of the first embossed portion 16 in the longitudinal direction and the outermost point in the width direction on both sides of the second embossed portion 17 in the width direction The imaginary figure surrounded by two lines B extending to and is a figure with the minimum area that includes the entirety of the embossed grooves 15 and has a similarity relationship with the planar view shape of the absorbent sheet. At this time, the distances between the edges of the virtual figure and the edges of the absorbent sheet 20 are indicated by L1 and L2 as lengthwise distances and W1 and W2 as widthwise distances in FIG. However, they are all the same, and may be 0 mm (when the virtual figure and the shape of the absorbent sheet in plan view match), and when there is a distance, it is in the range of 0 mm or more and 3 mm or less, for example. According to this embodiment, the discharged bodily fluids are smoothly absorbed by the absorbent sheet 20 through the embossed portions 15 . When the distance between the edge of the virtual figure and the edge of the absorbent sheet exceeds 3 mm, part of the body fluid diffused from the embossed portion 15 is not readily absorbed by the absorbent sheet 20, and overflows onto the skin-side surface. Leakage tends to occur more easily. It should be noted that L1, L2, W1, and W2 may be individually varied, for example, within a range of 0 mm or more and 3 mm or less, without being limited to this embodiment.

In another preferred embodiment, in the width direction of the absorbent sheet 20, the minimum distance W3 (FIG. 5) from one end of the first embossed groove 16 in the width direction to the tip of the second embossed groove 17 in the same width direction is For example, it is in the range of 3 mm or more and 8 mm or less. According to this embodiment, the effect of improving body fluid diffusibility by forming the embossed grooves 15 is stably exhibited. If the minimum distance W3 is less than 3 mm, body fluid diffusibility tends to be insufficient. If the minimum distance W3 exceeds 8 mm, a thick bodily fluid flow will occur, which tends to cause leakage.

In yet another preferred embodiment, in the second embossed grooves 17 shown in FIG. 10, the second embossed grooves 17 facing the width direction edge of the absorbent sheet are formed with an X-shaped shape "X" in plan view. Angles α, β, γ (FIG. 10) are 50° or more and 90° or less. According to this embodiment, the effect of improving body fluid diffusibility by forming the second embossed grooves 17 is stably exhibited. When the angles α, β, and γ are less than 50° and more than 90°, the superabsorbent polymer 12 swollen by absorbing body fluid causes gel blocking, filling the second embossed grooves 17, and the diffusibility of body fluid decreases. Tend. In addition, when there are a plurality of second embossed grooves 17 as shown in FIG. 10, the angles α, β, and γ may be the same or different.

(Carrier sheet)
In this embodiment, the absorbent sheet 20 may be wrapped with a carrier sheet (not shown). The carrier sheet is a hydrophilic sheet and completely or partially envelops the absorbent sheet 20 . For example, the absorbent sheet 20 is placed in the center of the carrier sheet in the width direction, and if necessary, the carrier sheet and the absorbent sheet 20 are adhered with a hot-melt adhesive or the like. By stacking the absorbent sheet 20 on the skin side and adhering with a hot-melt adhesive or the like as necessary, the absorbent sheet 20 can be obtained by C-folding with the carrier sheet. As the carrier sheet, any hydrophilic sheet commonly used in this field can be used, for example, hydrophilic nonwoven fabrics such as thermal bonded nonwoven fabric, spunbond nonwoven fabric, air-laid nonwoven fabric, air-through nonwoven fabric, pulp-containing nonwoven fabric, tissue paper, and absorbent paper. etc. Among hydrophilic nonwoven fabrics, hydrophilic nonwoven fabrics such as thermal bonded nonwoven fabrics, spunbond nonwoven fabrics, air-through nonwoven fabrics, and pulp-containing nonwoven fabrics are more preferred, and air-through nonwoven fabrics, pulp-containing nonwoven fabrics, spunbond nonwoven fabrics, and the like are more preferred. Further, the thickness of the carrier sheet is, for example, 0.10 mm or more and 0.25 mm or less, and the basis weight is, for example, 5 g/m ² or more and 40 g/m ² or less.

(back seat)
The back sheet 30 may be formed using a liquid-impermeable sheet material such that the body fluid retained by the absorbent sheet 20 does not wet the clothes of the wearer. A film, a composite sheet which is a laminate of a resin film and a nonwoven fabric, and the like can be mentioned. The nonwoven fabric used for the composite sheet is not particularly limited in manufacturing method, and examples include single-layer nonwoven fabrics such as spunbond nonwoven fabrics and meltblown nonwoven fabrics, spunbond nonwoven fabric/meltblown nonwoven fabric laminates, spunbond nonwoven fabric/meltblown nonwoven fabric/spunbond nonwoven fabric laminates. Composite nonwoven fabrics such as bodies, composite materials thereof, and the like. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, composite films of polyethylene and polypropylene, and the like.

The basis weight of the backsheet 30 is, for example, in the range of 15 g/m ² or more and 60 g/m ² or less from the viewpoint of strength and workability. 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. Calcium carbonate can be used as a filler, and a known method can be used without limitation as a method for blending the filler.

(Three-dimensional gather)
For example, the three-dimensional gathers 40 are formed along the longitudinal direction of the absorbent body 51 near both ends in the width direction of the absorbent body 51 in order to prevent lateral leakage of bodily fluid excreted by the wearer of the absorbent body 51 . Fixed on the side. The three-dimensional gathers 40 include an elastic stretchable member 40a and a water-repellent and/or waterproof sheet member 40b.

The elastic stretchable member 40a is arranged in the vicinity of the free end (the other end) of the sheet member 40b along the longitudinal direction, and provides the free end with uprightness so that the free end of the sheet member 40b and its neighboring area can be used by the wearer. Make it deformable according to the body shape of. In the present embodiment, the sheet member 40b has one widthwise end (fixed end) fixed near both widthwise ends of the skin side surface of the back sheet 30, and a widthwise intermediate portion fixed near both widthwise ends of the skin side surface of the top sheet 10. and the other end in the width direction is a free end having an upright property. The fixing position of the fixed end (one end in the width direction) of the sheet member 40b is not limited to this embodiment. Near both width direction ends of the skin side or non-skin side of the joined body, near both width direction ends of the skin side of the top sheet 10, and the like.

The sheet member 40b is a water-repellent and/or waterproof sheet, and is made of, for example, non-woven fabric. As the nonwoven fabric for the first sheet member, a water-repellent and/or waterproof (liquid-impermeable) nonwoven fabric made of hydrophobic fibers can be used without particular limitation. Composite nonwoven fabrics (SMS nonwoven fabrics), which are nonwoven fabric/meltblown nonwoven fabric/spunbond nonwoven fabric laminates, and the like can be mentioned. The basis weight of the sheet member 40b is, for example, in the range of 13 g/m ² or more and 20 g/m ² or less. As the elastic stretchable member 40a, for example, a string-like, string-like, or belt-like member made of natural rubber, synthetic rubber, polyurethane, or the like can be used as appropriate.

<Method for manufacturing absorber>
The absorbent body 51 can be manufactured by a known manufacturing method. A step of fixing the edges of 30 using a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, etc. over a part or the entire circumference; and placing at a position. The absorber 51 is appropriately provided with leg gathers, waist gathers, side flaps, and the like as necessary. Thus, the absorbent body 51 is obtained.

<Method for producing underpants-type absorbent article>
The pants-type absorbent article 50 is produced by, for example, obtaining the outer body 1 in which the abdominal part 2 and the back part 3 are composed of the composite sheet 8 and the crotch part 4 is composed of the first nonwoven fabric 5; A step of fixing the absorber 51 to a predetermined position (mainly the crotch portion 4) on the skin side surface of 1, and welding both widthwise ends of the abdominal portion 2 and the back portion 3 to form the side seal portion 80. The pants-type absorbent article 50 is obtained by the manufacturing method including the steps. The pants-type absorbent article 50 obtained in this way is folded in a predetermined order and packed in a bag to be manufactured.

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 described in the above embodiments. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. 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 embodiment will be described more specifically with reference to Examples.

<Examples 1 to 11, Comparative Examples 1 to 10>
(Fabrication of exterior body)
^A stretchable film ( Polyurethane film, 20 μm thickness, 250% stretch rate in the stretching direction, width dimension 270 mm) and a second nonwoven fabric (polypropylene spunbond nonwoven fabric, basis weight 20 g/m ² , width dimension 270 mm) are laminated in order. A sheet is obtained, and this laminated sheet is joined and integrated by ultrasonic bonding, and the plan view shape and arrangement of the joining pieces shown in FIG. 5 (arrangement X and arrangement Y are alternately arranged in the direction perpendicular to the column) and provided with composite sheets having dimensions shown in Table 1 (each dimension of A, B, C, D1, D2, and D3 shown in FIG. 5) at both ends in the longitudinal direction, Examples 1 to 11, Comparative Examples 1-10 Exterior bodies were produced.
In the external bodies of Comparative Examples D to F, the planar shape of the joining piece was circular (joining pattern D) or rectangular (joining patterns E and F).

(Production of absorber)
Using the hydrophilic nonwoven fabrics, SAP layers, and pulp sheets shown in Tables 3 and 4, absorbent sheet precursors of Examples 1 to 11 and Comparative Examples 1 to 10 shown in FIG. 8 or 9 were produced. The skin-side surface of the obtained absorbent sheet precursor was embossed to prepare absorbent sheets of Examples 1 to 11 and Comparative Examples 1 to 10 shown in FIG. Using the obtained absorbent sheet, using an air-through nonwoven fabric with a basis weight of 30 g/m ² as the top sheet and an air-permeable polyethylene film with a basis weight of 32 g/m ² as the back sheet, Examples 1 to 11 and Comparative Examples 1 to 10 of the absorber was produced.

(Production of pants-type absorbent article)
The exterior body and absorbent body obtained above were used. The absorber was joined mainly to the skin-side surface of the crotch portion of the exterior body with a hot-melt adhesive. In addition, on the spunbond nonwoven fabric on the skin side surface of both ends in the longitudinal direction of the outer body, 6 urethane rubber threads of 1240 decitex stretched to 300% are arranged so as to extend in the circumferential direction of the waist opening. Then, waist gathers were joined to produce pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10.

The pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10 obtained above were evaluated as follows. Tables 3 and 4 show the results.

The following evaluation tests and sensory evaluation were carried out. Tables 3 and 4 show the results.
(Breathability evaluation, elongation evaluation)
After stretching the composite sheet portion of the prepared exterior body by 250% once in the stretching direction, the stretching is released, and air permeability is measured using an air permeability tester (trade name: KES-F8, manufactured by Kato Tech Co., Ltd.). A resistance value R (kPa·s/m) was measured. Also, using an autograph manufactured by Shimadzu Corporation, the elongation load (N/50 mm) at 120% elongation and 150% elongation at a sample width of 50 mm (perpendicular to the stretching direction) was measured.
(Evaluation of elasticity, fit, and flexibility of exterior body)
Each pants-type absorbent article of Examples 1 to 11 and Comparative Examples 1 to 10 was worn by 20 monitors, and stretchability (whether it was easy to wear), fit, flexibility of the outer body part ( Whether or not it has a soft touch and texture) was subjected to a sensory evaluation. As for the sensory evaluation, each evaluation was conducted with two choices of "good" and "bad", and evaluated according to the following criteria.
〇: When 12 to 20 people are “good” △: When 5 to 11 people are “good” ×: When there is no “good” or 1 to 4 people

The pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10 were evaluated as follows. The results are shown in Table 3 or Table 4.
(Thickness of absorbent article)
The thickness of the absorbent article was measured by using an ABS Digimatic Height Gauge HDS-HC (Mitutoyo Co., Ltd.) for the central portion (crotch portion) of the pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10. .
(Absorption speed 3 times method)
A measuring jig weighing 755.6 g and having a hole with an inner diameter of 19 mm in the center of a cylinder with a ^bottom area of 16.8 cm was placed in the longitudinal direction of the pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10. Then, place it on the central part in the width direction, drop 40 ml of physiological saline from each hole in the upper part, and from the time when the physiological saline comes into contact with the absorbent article, the liquid is completely sucked into the circumference of the jig center circle. The time was measured with the end point at the point at which it reached the end (first time). Then, after 3 minutes had passed, the same time was measured (second time), and the third time was measured in the same way, and the total value of the three times was obtained.
(45 degree leak test)
A 45 degree leak test was performed to see the temporary absorption of bodily fluids. Two acrylic plates of 250 mm x 400 mm x 8 mm were fixed, one horizontally and the other at an angle of 45 degrees from the horizontally placed acrylic plate. The pants-type absorbent articles of Examples 1 to 11 and Comparative Examples 1 to 10 were attached to the acrylic plate on the side inclined at 45 degrees from the horizontal. 20 mL of physiological saline was poured toward the center of the absorbent article, and the underpants-type absorbent article was evaluated as "O" if no leakage occurred, and as "X" if leakage occurred.

From Table 3, it can be seen that the pants-type absorbent articles of Examples 1 to 11 have a high absorption rate, good 45-degree leakage, no problem in temporary absorption, and little leakage. On the other hand, it can be seen that the pants-type absorbent articles of Comparative Examples 1 to 10 in Table 4 have a slow absorption rate, poor 45-degree leakage, or both.

(Examples 12-14 and Comparative Examples 11-12)
(feeling stuffy in the crotch area)
Example except that the joint arrangement pattern B (Table 1) is used for the composite sheet portion (abdominal portion and back portion) of the outer body, and the spunbond nonwoven fabric shown in Table 5 is used as the first nonwoven fabric for the crotch portion. Exterior bodies of Examples 12 to 14 and Comparative Examples 11 to 12 were produced in the same manner as in 1. Next, using the absorbent sheet of Example 5, an air-through nonwoven fabric having a basis weight of 30 g/m ² as the top sheet, and an air-permeable polyethylene film having a basis weight of 32 g/m ² as the back sheet, were used between the top sheet and the back sheet. , and the absorbent sheets of Example 5 were arranged to prepare absorbent bodies of Examples 12-14 and Comparative Examples 11-12. The obtained absorbent body was bonded to the skin-side surface of the crotch part of the outer body mainly with a hot-melt adhesive. Furthermore, on the spunbond nonwoven fabric on the skin side surface of both ends in the longitudinal direction of the outer body, urethane rubber threads of 1240 decitex are arranged so as to extend in the circumferential direction of the waist opening, each in a state of being stretched to 300%. Then, waist gathers were joined to produce pants-type absorbent articles of Examples 12-14 and Comparative Examples 11-12.

Twenty monitors were asked to wear the pants-type absorbent articles of Examples 12 to 14 and Comparative Examples 11 to 12 obtained above, and a sensory evaluation was performed on the feeling of stuffiness in the crotch area. As for the sensory evaluation, each evaluation was conducted with two choices of "good" and "bad", and evaluated according to the following criteria. ``○'' indicates that 12 to 20 people are "good"; ``△'' indicates that 5 to 11 people are "good"; ×” in Table 5.

From Table 5, it can be seen that the pants-type absorbent articles of Examples 12 to 14 use a spunbonded nonwoven fabric having an appropriate basis weight in the crotch portion to reduce the feeling of stuffiness in the crotch portion of the wearer.
From the above results, according to the present embodiment, gel blocking is less likely to occur, so the absorption speed is fast, and the absorption is excellent in temporary absorption. goods can be obtained.

REFERENCE SIGNS LIST 1 outer body 2 ventral portion 3 back portion 4 crotch portion 4A crotch portion concave portion 5 first nonwoven fabric 5A second nonwoven fabric 6 elastic film 7 waist gathers 8 composite sheet 9A waist circumference opening 9A
9B leg opening 10 top sheet 12 super absorbent polymer 15 embossed groove 16 first embossed groove 17 second embossed groove 20 absorbent sheet 20A, 25A absorbent sheet precursor 21 first, second, third Hydrophilic nonwoven fabric 22 Pulp sheet 23 First, second and third superabsorbent polymer layers (SAP layers)
30 back sheet 40 three-dimensional gathers 40a elastic stretchable member 40b sheet member 50 pants-type absorbent article 51 absorber 60 second sheet 70 joint part 71 joint piece 75 square 76 circle 80 side seal part

Claims (13)

A pants-type absorbent article comprising an outer body divided into an abdominal part, a crotch part, and a back part, and an absorbent body that is mainly supported by the crotch part of the outer body and absorbs body fluids,
The absorbent body includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent sheet disposed therebetween. A hydrophilic nonwoven fabric that diffuses in a direction and a superabsorbent polymer layer that absorbs body fluids, and has a pulp sheet that is positioned closest to the non-skin side of the wearer and temporarily retains body fluids,
The exterior body is
a first nonwoven fabric provided so as to extend from the ventral portion through the crotch portion to the dorsal portion;
a second nonwoven fabric arranged in regions corresponding to the ventral portion and the dorsal portion on both sides in the longitudinal direction of the first nonwoven fabric;
an elastic film disposed between the first nonwoven fabric and the second nonwoven fabric in regions corresponding to the ventral portion and the dorsal portion of the first nonwoven fabric;
a joining portion that joins and integrates the first nonwoven fabric, the elastic film and the second nonwoven fabric,
It further has waist gathers that are provided in the circumferential direction along a waist opening formed by joining both widthwise ends of the abdominal portion and both widthwise ends of the dorsal portion and that include an elastic stretchable member. , a pants-type absorbent article. 2. A pant-type absorbent article according to claim 1, having a boxer shorts-type appearance. 2. The joint portion includes a plurality of small joint pieces spaced apart from each other in a plane direction, and the small joint piece has a planar shape including a corner portion derived from a quadrangle and a partial arc portion derived from a circle. Or the pants-type absorbent article according to claim 2. The sheet region in which the first nonwoven fabric, the elastic film, and the second nonwoven fabric are integrated by the joint portion has an airflow resistance value of 0.01 kPa s/ when stretched 250% in the stretching direction. 4. The pants-type absorbent article according to any one of claims 1 to 3, wherein the range is from 0.5 kPa·s/m to 0.5 kPa·s/m. 1. The sheet region in which the first nonwoven fabric, the elastic film, and the second nonwoven fabric are integrated by the joining portion has an elongation rate in the stretching direction of 150% or more and 270% or less. The pants-type absorbent article according to claim 4. The pants-type absorbent article according to any one of claims 1 to 5, wherein the number of said elastic stretchable members is 3 or more and 8 or less. The absorbent sheet includes, in order from the wearer's skin side, the first hydrophilic nonwoven fabric, the first superabsorbent polymer layer, the second hydrophilic nonwoven fabric, the second superabsorbent polymer, and the The underpants-type absorbent article according to any one of claims 1 to 6, which is a first absorbent sheet obtained by stacking pulp sheets. The absorbent sheet includes, in order from the wearer's skin side, the first hydrophilic nonwoven fabric, the first superabsorbent polymer layer, the second hydrophilic nonwoven fabric, the second superabsorbent polymer, and the third superabsorbent polymer layer. The pants type according to any one of claims 1 to 6, which is a second absorbent sheet in which the hydrophilic nonwoven fabric, the third superabsorbent polymer layer, and the pulp sheet are superimposed. absorbent article. The absorbent sheet has embossed grooves extending from its skin-side surface to the skin-side surface of the pulp sheet,
The embossed grooves include a first embossed groove extending longitudinally in the widthwise center of the skin-side surface of the absorbent sheet, and a plurality of embossed grooves intersecting or contacting the first embossed grooves at an acute angle. 9. The pant-type absorbent article according to any one of claims 1 to 8, comprising second embossed grooves. 10. The absorbent article according to claim 9, wherein the second embossed grooves are formed in an X-shape in plan view on the skin-side surface of the absorbent sheet, and the crossing point of the X-shape is located on the first embossed grooves. . The pants-type absorbent article according to any one of claims 1 to 10, wherein the absorbent sheet has a thickness of 0.5 mm or more and 5 mm or less. 12. The hydrophilic nonwoven fabric according to any one of claims 1 to 11, wherein the basis weight is 10 g/m ² or more and 40 g/m ² or less, and the thickness is 0.05 mm or more and 0.3 mm or less. The pants-type absorbent article according to 1. The pulp sheet according to any one of claims 1 to 12, wherein the basis weight is 10 g/m ² or more and 40 g/m ² or less, and the thickness is 0.05 mm or more and 0.5 mm or less. A pants-type absorbent article.

Images