JP6749233B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

BACKGROUND ART Sanitary napkins are known as absorbent articles that absorb excreted liquid such as menstrual blood. As an example of such a sanitary napkin, Patent Document 1 discloses that when subjected to lateral compression, the absorbent core 12 is formed along a molding line 20 including a central vertical line 22 provided in the absorbent core 12. Disclosed is a sanitary napkin 10 in which 12 is bent upward (skin side) to improve body fit.

Japanese Patent Publication No. 2002-538849

However, the molding line 20 of the sanitary napkin 10 of Patent Document 1 is provided in the central portion (crotch region) in the vertical direction, and when worn, the upward bending of the absorbent core 12 is reduced, and the wearer There is a risk that the fit of the body will be reduced. In order to improve this, for example, if the molding line 20 is formed longer than the central portion in the vertical direction, the absorbent article bent upward (skin side) may hit the wearer's abdomen or buttocks, and the wearer may feel uncomfortable. There was a risk of causing.

The present invention has been made in view of the above problems, and provides an absorbent article that corresponds to the shape of the body of the wearer and improves the fit.

The main invention for achieving the above object is:
Provided with a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other,
An absorbent article having an absorbent body having liquid absorbent fibers,
The absorber has a concave portion along the longitudinal direction in a central region including a central position in the width direction,
The fiber density of the skin side portion adjacent to the recess in the thickness direction from the skin side is higher than the fiber density of the outer portion adjacent to the recess in the width direction from the outside,
The fiber density of the skin-side part in the crotch part located in the crotch part when worn is higher than the fiber density of the skin-side part in the one end in the longitudinal direction,
In the absorbent article, the thickness of the absorber at the crotch portion is larger than the thickness of the absorber at the one end .
Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

According to the present invention, the higher the fiber density is, the higher the rigidity is, and the fiber density of the skin side part in the crotch part that is in contact with the excretory mouth of the user is the fiber of the skin side part at one end in the longitudinal direction. By being higher than the density, in the crotch region in the longitudinal direction, it is easy to bend and deform to bulge to the skin side, while the one end in the longitudinal direction easily follows the shape of the abdomen or buttocks of the wearer's body. As described above, the bending deformation can be moderated.

FIG. 1 is a front view of the sanitary napkin 1 viewed from the skin side in the thickness direction. FIG. 2 is a plan view of the napkin 1 viewed from the non-skin side in the thickness direction. FIG. 3 is a schematic cross section taken along the line AA in FIG. FIG. 4 is a plan view of the absorber 10 of the napkin 1 as viewed from the non-skin side in the thickness direction. FIG. 5A is a schematic cross-sectional view in which the absorbent body point-like squeezed portion ED10 is formed on the unprocessed absorbent body 10 in the portion indicated by the arrow BB in FIG. 1. FIG. 5B is a schematic cross-sectional view in which the recess 15 is formed in the absorber 10 of FIG. 5A. FIG. 5C is a schematic cross-sectional view in which the top sheet 20 is laminated on the absorber 10 of FIG. 5B. FIG. 5D is a schematic sectional view of the napkin 1 of FIG. 5C in which the main body point-like compressed portion ED20 is formed. FIG. 6 is a schematic enlarged view of the pair of roll portions 50. FIG. 7 is a diagram illustrating a usage mode of the napkin 1. FIG. 8A is a schematic sectional view of the recess 15 in FIG. 5D. FIG. 8B is an enlarged view of a portion Z in FIG. 8A. FIG. 9A is a diagram illustrating the recess 15 of the napkin 1 before use. FIG. 9B is a diagram illustrating the recess 15 of the napkin 1 in the worn state. FIG. 10A is a schematic sectional view of the recess 15 in the crotch region. FIG. 10B is a schematic sectional view of the recess 15 on the rear side. FIG. 11 is a modification of the pair of roll portions 50.

At least the following matters will be made clear by the description in the present specification and the accompanying drawings.
A longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, which is an absorbent article having an absorbent body having a liquid absorbent fiber, wherein the absorbent body has a central region including a central position in the width direction, Having a recess along the longitudinal direction, the fiber density of the skin side portion adjacent to the recess in the thickness direction from the skin side is higher than the fiber density of the outer portion adjacent to the recess from the outside in the width direction. The absorbent article is characterized in that the fiber density of the skin side part in the crotch part located at the crotch part when worn is higher than the fiber density of the skin side part at one end in the longitudinal direction.

According to such an absorbent article, the higher the fiber density is, the higher the rigidity is, and the fiber density of the skin-side part in the crotch part that is in contact with the excretory mouth of the user is the skin at one end in the longitudinal direction. Since the fiber density is higher than that of the side portion, in the crotch portion in the longitudinal direction, bending deformation that rises to the skin side is facilitated, while one end portion in the longitudinal direction has a shape of the abdomen or buttocks of the wearer's body. Bending can be moderated so that it is easier to follow.

In such an absorbent article, at the position where the deepest deepest portion of the recessed portion in the crotch portion overlaps in the width direction, the center in the thickness direction of the absorber is at a position where the outer portion overlaps in the width direction, It is desirable to be located closer to the skin than the center of the absorber in the thickness direction.

According to such an absorbent article, when worn, the crotch portion is likely to bend so as to bulge to the skin side, fits easily to the excretory opening, and excretions are more easily absorbed.

In such an absorbent article, it is desirable that the recess be provided from one end to the other end of the absorber in the longitudinal direction.

According to such an absorbent article, while the crotch portion is fitted to the excretory mouth of the wearer, the end portion in the longitudinal direction of the absorber is more gentle than the crotch portion, depending on the shape of the wearer's abdomen or buttocks. Because it deforms, it will be easier to fit the body.

In such an absorbent article, the mass of the liquid absorbent fiber per unit area of the skin side part in the crotch part is larger than the mass of the liquid absorbent fiber per unit area of the skin side part at the one end. Is desirable.

According to such an absorbent article, since the mass of the liquid absorbent fiber per unit area of the skin side portion in the crotch part is larger than the mass of the liquid absorbent fiber per unit area of the skin side portion at one end, At the site, more excrement can be absorbed.

In such an absorbent article, it is preferable that the cross-sectional shape of the recess along the width direction at the crotch portion is different from the cross-sectional shape of the recess along the width direction at the one end.

According to such an absorbent article, since the cross-sectional shapes of the concave portion at the crotch portion and the concave portion at one end portion are different, the change in the shape of the crotch portion of the absorbent body when worn and the change in the shape at the one end portion are made different. be able to.

In such an absorbent article, it is desirable that the deepest deepest part of the recess in the crotch part is deeper than the deepest deepest part of the recess in the one end.

According to such an absorbent article, the deepest part of the recess in the crotch part makes the crotch part easier to deform so that the absorbent body protrudes more to the skin side, and the deepest part of the recess in the one end part. Since the depth is shallower, the absorber can be deformed more gradually at one end.

In such an absorbent article, in the crotch region, on the skin surface side of the absorber, a pair of skin-side recesses are provided along the longitudinal direction, and in the width direction, the pair of skin-side recesses are It is preferable that the skin-side recesses are not provided at the one end, which is shallower than the deepest deepest part of the recess and provided on both outer sides of the deepest part.

According to such an absorbent article, in the crotch region, when the absorbent body is deformed so as to bulge to the skin side due to the recess formed on the non-skin side surface, the region between the skin side recesses is worn. It is easy to hit the person's skin. At this time, the wearer's skin can be brought into contact with the wearer's skin in a region closer to the plane than the one end portion where the pair of skin-side recesses are not provided, and thus the skin contact can be improved.

In such an absorbent article, it is desirable that a squeezing portion that crosses the recess in the width direction is not provided in the crotch portion.

If the compressed portion that crosses the recess in the width direction is provided in the crotch portion, the recess in the crotch portion may hinder the deformation of the absorber to be raised to the skin side. However, in the crotch region, by not providing a compressed portion that crosses the recess in the width direction, the recess in the crotch region makes it easier to raise the absorbent body to the skin side, and allows the absorbent body to fit the excretory opening of the wearer. It will be easier.

=== First Embodiment ===
<Basic configuration of sanitary napkin 1>
A sanitary napkin 1 (hereinafter referred to as "napkin 1") will be described as an example of the absorbent article according to the present embodiment. In the following description, a sanitary napkin will be described as an example of an absorbent article, but the absorbent article of the present embodiment also includes a so-called bag sheet (for example, a panty liner) and the like. It is not limited to napkins.

FIG. 1 is a front view of the sanitary napkin 1 viewed from the skin side in the thickness direction. FIG. 2 is a plan view of the napkin 1 viewed from the non-skin side in the thickness direction. FIG. 3 is a schematic cross section taken along the line AA in FIG. In the following description, the “longitudinal direction” along the product longitudinal direction of the napkin 1, the “width direction” orthogonal to the longitudinal direction along the product lateral direction of the napkin 1, the longitudinal direction and the width direction, respectively. It is defined as the "thickness direction" which is orthogonal to each other. The longitudinal direction has a “front side” that is the ventral side of the wearer and a “rear side” that is the back side of the wearer when the napkin 1 is used. The thickness direction is the “skin side” (also referred to as “upper side”), which is the side (upper side in FIG. 3) that contacts the wearer's skin when wearing the napkin 1, and the opposite side (lower side in FIG. 3). “Non-skin side” (also referred to as “lower side”). The line X-X in the figure is the center line in the width direction.

The napkin 1 is a vertically elongated sheet-like member in plan view, and includes a liquid-permeable top sheet (skin-side sheet) 20, a liquid-absorbent absorber 10, and a liquid-impermeable back sheet (non-skin-side sheet). ) 30 are sequentially stacked from the skin side in the thickness direction to the non-skin side (see FIG. 3 ). Each of these members 20, 10 and 30 is joined to a member adjacent in the thickness direction by an adhesive HMA such as a hot melt adhesive. The adhesive HMA is applied in an arbitrary application pattern over the entire skin surface side and non-skin surface side of the absorber 10, and is selected from application patterns such as an Ω pattern, a spiral pattern, and a stripe pattern. be able to.

The topsheet 20 and the backsheet 30 have the same planar shape, and the planar size thereof is larger than the planar size of the absorber 10. Then, as shown in FIGS. 1 and 2, the outer peripheral edge portions 20e and 30e of the sheets 20 and 30 are bonded to each other by adhesion or welding, so that the absorbent body 10 is held between the sheets 20 and 30. To be done. In addition, a wing portion in which substantially central portions in the longitudinal direction of the topsheet 20 and the backsheet 30, which serve as fixing portions provided when the napkin 1 is placed and fixed on underwear (not shown), extends outward in the width direction. 20w and 30w are formed.

The absorber 10 has an absorbent core 11, an upper sheet 12, and a lower sheet 13. The absorbent core 11 is a member that absorbs and holds a liquid (excretion liquid) such as menstrual blood. The absorptive core 11 has a cellulosic absorptive fiber which is a liquid absorptive fiber, and a thermoplastic resin fiber, and in a state where these fibers are mixed with each other, as shown by a broken line in FIG. It is formed in a vertically long shape. For example, a pulp fiber or the like is used as the liquid absorbent fiber, and a so-called sheath-core structure composite fiber having a polyethylene (PE) sheath and a polyethylene terephthalate (PET) core is used as the thermoplastic resin fiber. Rayon fibers may be used as the liquid absorbent fibers, and polypropylene (PP) single fibers or PE single fibers may be used as the thermoplastic resin fibers. In addition, liquid absorbent particles such as a super absorbent polymer (so-called SAP) may be added to the liquid absorbent fiber.

The upper sheet 12 is a sheet member having a substantially same planar shape as the absorbent core 11, and is joined by an adhesive HMA so as to cover the skin side surface of the absorbent core 11 (FIG. 3 ). As the upper sheet 12, a flexible sheet having excellent liquid permeability such as a nonwoven fabric such as an air-through nonwoven fabric or a tissue paper is used. The lower sheet 13 is a sheet member whose planar shape is substantially the same as that of the absorbent core 11, and is joined by an adhesive HMA so as to cover the non-skin side surface of the absorbent core 11 (FIG. 3 ). As the lower sheet 13, a non-woven fabric such as SMS (spun bond/melt blown/spun bond) non-woven fabric or a flexible sheet such as tissue paper is used.

FIG. 4 is a plan view of the absorber 10 of the napkin 1 as viewed from the non-skin side in the thickness direction. FIG. 4 shows the outer shape of the napkin 1 by a dotted line for convenience. The absorbent body 10 is provided with a plurality of absorbent body point-like squeezed portions ED10 in order to increase the rigidity of the absorbent body 10 and to improve the absorbability and diffusibility of liquid. The planar shape of the absorber point-like compressed portion ED10 is substantially circular and has a staggered arrangement pattern, but the present invention is not limited to this. Further, the thickness of the absorber 10 is 3 mm or less, preferably 2 mm or less, and the fiber density of the absorber 10 is 1.0×10 ^{5 to} 4.0×10 ⁵ (g/m ³ ) and is substantially uniform. Is. However, the mass of fibers per unit area of the absorbent body 10 is different between the front side portion, the central portion, and the rear side portion in the longitudinal direction. In the present embodiment, the mass (weight) of the liquid-absorbent fiber per unit area (hereinafter, also referred to as “the mass of fiber per unit area”) is 175 (g/m ² ) in the front part and in the central part. 250 (g/m ² ) and 175 (g/m ² ) on the rear side, the mass of the fiber per unit area of the central part is the largest, and the thickness of the absorbent body 10 on the front side and the rear side (tb10 ), the thickness of the absorber 10 (t10) in the central portion is larger (t10>tb10).

In addition, by making the mass of the fiber per unit area of the central part including the crotch part (described later) larger than the mass of the fiber per unit area of the rear side including the rear end of the napkin 1. , The excrement absorbed at the central portion in the longitudinal direction of the absorbent body 10 is located outside the widthwise end of the absorbent body 10 so that the excrement can be absorbed more in the crotch region in contact with the wearer's excretory opening. It reduces the risk of leakage.

The thicknesses of the front side portion, the central portion, and the rear side portion of the absorbent body 10, the mass of the fiber per unit area, and the density of the liquid absorbent fiber (also referred to as “fiber density”) can be measured by a known method. it can. For example, for each thickness, a dial thickness gauge ID-C1012C manufactured by Mitutoyo Corporation or equivalent is used, and the area of the contactor is set to 20 cm ² , the contact pressure is set to ³ gf/cm ² , and the target portion is applied. The measurement may be performed by pressing, or the visual comparison may be performed, or the comparison may be performed using an image obtained by photographing a cross section of the napkin 1 cut in the longitudinal direction. In addition, the mass of the fiber per unit area is obtained by, for example, cutting out a target portion from the napkin 1 as a target sample, and measuring the mass of the target sample with a direct balance (for example, an electronic balance HF-300 manufactured by Kenseiki Co., Ltd.). Alternatively, the area of the target sample may be measured and the mass per unit area may be calculated. The density of the fiber is obtained by, for example, cutting out a target portion from the napkin 1 as a target sample, measuring the mass per unit area of the target sample (g/m ² ) by the above-mentioned measurement method, and measuring the thickness of the target sample by the above-mentioned measurement method. It can be calculated by measuring (m) and dividing the mass per unit area of the target sample by the thickness of the target sample (g/m ³ ).

Further, on the non-skin side surface of the absorbent body 10, a linear concave portion 15 is formed along the longitudinal direction in the central region in the width direction. The recessed portion 15 is provided in a substantially linear shape over the entire length in the longitudinal direction of the absorbent body 10 including at least the crotch portion located at the crotch portion when worn. The "groin region" is a region located in the crotch region when the wearer uses the napkin 1, and specifically, a region where the wing adhesive portion 40w is formed in the longitudinal direction of the napkin 1. Say. The recessed portion 15 guides the wearer to protrude and bend toward the skin side in the thickness direction when worn. Details of the recess 15 will be described later.

The top sheet 20 is a member that comes into contact with the skin of the wearer when the napkin 1 is used, and allows liquid such as menstrual blood to permeate from the skin side to the non-skin side in the thickness direction and move to the absorber 10. As the top sheet 20, a liquid-permeable flexible sheet of an appropriate nonwoven fabric such as an air-through nonwoven fabric is used.

As shown in FIG. 1, on the skin side surface of the top sheet 20, a plurality of compressed portions (a linear compressed portion EL and a main body point-shaped compressed portion ED20) are formed from the skin side, whereby the top sheet 20. And the absorber 10 are squeezed together in the thickness direction to be joined and integrated. A plurality of linear compression parts EL are formed continuously along the outer peripheral edge of the absorbent body 10, and have a substantially annular shape that is long in the longitudinal direction as a whole. The linear squeezing section EL is provided in the central portion in the longitudinal direction, is provided with a pair of linear squeezing sections ELc along the longitudinal direction, and is provided on the front side of the absorbent body 10, and the outer shape of the front end of the napkin 1 is provided. A linear compression part ELf having a shape along the line, a linear compression part ELb provided on the rear side of the absorber 10 and having a shape along the outer shape of the rear end of the napkin 1, and a linear compression part ELc. A pair of linear compression parts ELm, which are provided between the linear compression parts ELb and have a shape along the longitudinal direction, are provided. On the other hand, the main body point-like compressed portion ED20 has a substantially circular shape, and the linear compressed portions EL are discretely formed in a substantially closed region that divides the top sheet 20.

The backsheet 30 suppresses the liquid permeating the topsheet 20 and absorbed by the absorber 10 when the napkin 1 is used, from seeping out to the clothing side (non-skin side) such as underwear. As the back sheet 30, a liquid impermeable flexible sheet of an appropriate resin film such as polyethylene (PE) is used.

As shown in FIG. 2, on the non-skin surface side of the backsheet 30, there are adhesive portions (wing adhesive portion 40w, main body adhesive portion 40c) for attaching and fixing the napkin 1 to underwear when the napkin 1 is used. It is provided. The wing adhesive portion 40w is a pair of adhesive portions formed in a substantially rectangular shape on the non-skin surface side of the wing portion 30w. The main body adhesive portion 40c is a suitable adhesive in a portion between the width direction of the pair of wing adhesive portions 40w and in a plurality of strip-shaped regions along the longitudinal direction where the back sheet 30 and the absorbent body 10 overlap. It is formed by applying HMA. When using the napkin 1, by attaching the napkin 1 together with the underwear in a state where the main body adhesive portion 30c is attached to the inside of the crotch part (crotch portion) of the underwear, the position of the absorber 10 with respect to the wearer's body is improved. Do not shift. Similarly, the wing adhesive portion 40w is formed by applying an appropriate adhesive HMA to a substantially rectangular area in the area of the wing portion 30w. When using the napkin 1, the wing portion 30w (20w) is bent to the non-skin side, and the wing adhesive portion 40w is attached to the outside of the crotch of the underwear so that the napkin 1 is fixed, and the position shift during use occurs. And so on.

<Regarding the formation of the dot-shaped compressed parts ED10 and ED20 and the recessed part 15>
Subsequently, the formation of the dot-shaped compressed portions ED10 and ED20 and the recessed portion 15 will be described. The absorber point-like compressed portion ED10 and the main body point-like compressed portion ED20 are provided by compressing from the skin side or the non-skin side in the thickness direction, and at least the skin side or the non-skin side is recessed. The recessed portion 15 is a linear squeezed portion along the longitudinal direction, is provided in a central region including the center line XX in the width direction of the absorbent body 10 (napkin 1), has a substantially rectangular shape, and has a predetermined shape. Have an area. Moreover, the recessed portion 15 is a linear recessed portion provided by being squeezed in the thickness direction from the non-skin surface side of the absorber 10 and having a recessed non-skin side surface.

FIG. 5A to FIG. 5D are views for explaining formation of the point-like compressed parts ED10, ED20 and the recessed part 15. FIG. 5A is a schematic cross-sectional view in which the absorbent body point-like squeezed portion ED10 is formed on the unprocessed absorbent body 10 in the portion indicated by the arrow BB in FIG. 1. FIG. 5B is a schematic cross-sectional view in which the recess 15 is formed in the absorber 10 of FIG. 5A. FIG. 5C is a schematic cross-sectional view in which the top sheet 20 is laminated on the absorber 10 of FIG. 5B. FIG. 5D is a schematic sectional view of the napkin 1 of FIG. 5C in which the main body point-like compressed portion ED20 is formed. In addition, the absorber 10 in FIG. 5A is the absorber 10 in the portion shown by the arrow BB in FIG. 1, and is the absorber before processing before forming the point-like compressed portions ED10, ED20 and the recessed portion 15. 10 shows a state in which the absorber point-like compressed portion ED10 is formed, FIG. 5B shows a state in the middle of processing in which the recess 15 is formed in the absorber 10 in FIG. 5A, and FIG. 5D shows the absorber 10 The processed absorbent body 10 in which the point-like compressed portions ED10 and ED20 and the concave portion 15 are formed is shown in FIG. Moreover, the yy line in FIGS. 5A, 5B, and 5C is the center line of the absorber 10 in the thickness direction, and YY in FIG. 5D is the center line of the napkin 1 in the thickness direction. .. The center line Y-Y is a center line in the thickness direction of the napkin 1 and also a center line in the thickness direction of the outer region L of the absorber 10 described later.

First, the absorber point-like compressed portion ED10 is formed. The absorbent body 10 before processing has a thickness t10 over the entire area, and the skin side surface of the absorbent body 10 is the skin side surface 10t and the non-skin side surface is the non-skin side surface 10b. The absorbent body 10 before processing is passed through a roll gap between a convex roller (not shown) having a plurality of protrusions and an anvil roller (not shown) having a flat surface, and is pressed from the non-skin side of the absorbent body 10. By performing the above, the absorber point-like compressed portion ED10 is formed.

As shown in FIG. 5A, the portion where the absorber point-like compressed portion ED10 is formed is recessed from the skin side and the non-skin side, respectively, and is located at a substantially central portion in the thickness direction of the absorber 10. Further, by the compression processing, the thickness of the absorbent body 10 of the absorbent body point-like compressed portion ED10 becomes smaller than the thickness t10, the fibers are crushed and crushed, and the fiber density becomes higher than the portion having the thickness of t10.

Then, the recess 15 is formed. The recessed portion 15 is formed by applying compression processing to the central region of the absorbent body 10 in the width direction (FIG. 5B). Specifically, it is formed by using a pair of roll portions 50 having an upper roll 51u and a lower roll 51d that are driven and rotated along the transport direction.

FIG. 6 is a schematic enlarged view of the pair of roll portions 50. When the absorbent body 10 is transported with the longitudinal direction facing the transport direction, and the direction orthogonal to the transport direction is defined as the “CD direction”, the width direction of the absorbent body 10 is basically oriented in the CD direction. There is.

The upper roll 51u is provided with a rib portion 51r that continuously protrudes in an annular shape over the entire circumference in the rotation direction, and the shape of the cross section orthogonal to the rotation direction of the rib portion 51r has a rotation radius of the upper roll 51u. The rib width becomes narrower toward the outside in the direction, and the tip has a substantially isosceles trapezoidal shape with a top surface 51rt parallel to the CD direction. At least a part of the formed recess 15 with which the top surface 51rt abuts becomes the deepest part 15m described later. The length of the top surface 51rt in the CD direction (width direction) is preferably 0.5 mm to 3.0 mm, and is 1.0 mm in this embodiment. Further, the lower roll 51d is provided with a groove portion 51m, which can be inserted into the rib portion 51r, on the outer peripheral surface at a position facing the rib portion 51r in a continuous annular shape over the entire circumference in the rotation direction, The shape of the cross section of the groove portion 51m which is orthogonal to the rotation direction also has a substantially isosceles trapezoidal shape having a bottom surface 51mb parallel to the CD direction in which the groove width becomes narrower toward the inner side in the rotation radius direction of the lower roll 51d.

The recessed portion 15 is formed by pressing the rib portion 51r into the groove portion 51m and performing compression processing so that the thickness of the absorber 10 at the portion in contact with the top surface 51rt is the thinnest. Specifically, absorption is performed with the non-skin side surface 10b of the absorber 10 being the upper roll 51u and the skin side surface 10t of the absorber 10 being the lower roll 51d side along the conveyance direction between the upper and lower rolls 51u, 51d. It is formed by passing the body 10 and pushing the rib portion 51r into the groove portion 51m up to a portion located on the skin side of the skin side surface 10t of the absorbent body 10 before processing, as shown in FIG. Further, a skin-side concave portion P described later is formed in a portion P ₀ of the absorber 10 that comes into contact with a boundary portion between the outer peripheral surface of the lower roll 51d and the groove portion 51m.

At this time, the fiber density of the portion of the recess 15 where the absorber 10 comes into contact with the top surface 51rt and the thickness of the absorbent body 10 becomes the smallest becomes high. Unlike the point-like squeezed portions ED10 and ED20 formed by using the anvil roll, the recessed portion 15 is formed by pushing the rib portion 51r into the groove portion 51m, and thus is pressed and solidified more than the point-like squeezed portions ED10 and ED20. Has been processed.

Subsequently, as shown in FIG. 5C, the top sheet 20 to which the adhesive HMA is applied in advance is laminated and fixed from the skin side of the absorber 10.

After stacking the top sheets 20, the main body point-like compressed portion ED20 is formed. The top sheet 20 and the absorber 10 are squeezed together in the thickness direction from above the top sheet 20 to form a body point-like squeezed portion ED. The main body point-like squeezing section ED20 is similar to the absorber point-like squeezing section ED10 in the roll gap between a convex roller (not shown) having a plurality of protrusions and an anvil roller (not shown) having a flat surface. It is formed by performing compression processing from the skin side through the absorber 10 on which the top sheet 20 is placed (FIG. 5D).

After forming the main body point-like compressed portion ED20, the linear compressed portion EL is formed. The linear pressing unit EL has a roll gap between a convex roller (not shown) having a plurality of protrusions having an arrangement pattern corresponding to the linear pressing unit EL and an anvil roller (not shown) having a flat surface. By performing compression processing from the skin side through the absorber 10, the linear compression part EL is formed.

Then, the back sheet 30 is laminated and fixed from the non-skin side of the absorber 10. At this time, the adhesive HMA is applied in advance on substantially the entire surface of the back sheet 30 in a predetermined application pattern, and a constant pressure is applied from the non-skin surface side of the absorbent body 10 to stack the back sheet 30.

In the present embodiment, the absorber point-like compressed portion ED10 is formed, the concave portion 15 is formed, the topsheet 20 is stacked, the main body point-like compressed portion ED20 is formed, and the linear compressed portion EL is formed in this order. However, it is not limited to this. First, the concave portion 15 may be formed to form the absorber point-like compressed portion ED10. Further, the recess 15 may be formed after the top sheet 20 is laminated on the absorber 10.

<When using Napkin 1>
Hereinafter, a mode of using the napkin 1 will be described. FIG. 7 is a diagram illustrating a usage mode of the napkin 1. When the wearer wears the napkin 1, first, as shown in the state A of FIG. 7, the napkin 1 in a flat state is fixed to the crotch part of the undergarment. At this time, the length of the absorbent body 10 in the width direction is 70 mm, and when the wing portion 30w (20w) is bent to the non-skin side and the wing adhesive portion 40w is attached to the outer side of the crotch of the underwear, the napkin 1 is fixed. The width of the napkin 1 in the width direction is approximately the same as the length of the absorbent body 10 in the width direction. Generally, since the crotch width of the wearer is about 30 mm, the length of the napkin 1 (absorbent body 10) in the state A in the width direction is longer. Generally, the longer the width of the absorbent body 10 is, the more excrement can be absorbed. However, when the length of the absorbent body 10 in the width direction is too long, the width of the inseam of the wearer is smaller than that of the wearer. Since the size becomes large, the wearer may feel uncomfortable or the product may be bent at an unexpected portion, and excrement may leak. Therefore, as described later, it is appropriate to set the length of the absorber 10 to about 70 mm in consideration of the deformation according to the wearer's body.

Then, the operation of pulling up the underwear to the wearer's crotch 201K side is performed. At this time, as shown in the state B of FIG. 7, the napkin 1 is bent along the concave portion 15 of the absorbent body 10 so as to project to the skin side. Then, in the state where the napkin 1 is worn on the wearer's crotch 201K, as shown in the state C of FIG. 7, the portion that is guided to the concave portion 15 and protrudes to the skin side (skin side portion H in FIG. 8A and the like) is , It becomes easy to come into contact with the gap where the excretion opening 201He such as the vaginal opening exists. This makes it easier for the wearer to feel a good fit and also allows the absorbent body 10 to easily absorb the excreted liquid such as menstrual blood. Further, since the shape of the body of the wearer is deformed, the absorbent body 10 (napkin 1) having a width longer than the crotch width of the wearer becomes a size suitable for the body of the wearer, and absorbs the amount of excrement. The napkin 1 can be fitted to the wearer's body while ensuring.

<Regarding Configuration and Operation of Recess 15>
First, the recess 15 in the crotch portion will be described. FIG. 8A is a schematic sectional view of the recess 15 in FIG. 5D. FIG. 9A is a diagram illustrating the recess 15 of the napkin 1 before use, and FIG. 9B is a diagram illustrating the recess 15 of the napkin 1 in a worn state. The length and depth of each part in the following description can be measured by a known method. For example, the napkin 1 can be measured using an image of a cross section taken in the width direction.

The recessed portion 15 is a groove formed by squeezing, and in the state of the napkin 1 before use, from the portion of the non-skin side surface 10b of the absorbent body 10 that begins to curve to the skin side on one side in the width direction, to the other side. In the area up to the part that has finished bending to the skin side. The width 15w of the recess 15 in the width direction is preferably 1.5 mm to 3.5 mm, and in the present embodiment, the length 15w is about 2.4 mm. The longer this 15w, the more easily the absorbent body 10 bends, but since the concave portion 15 is formed by squeezing, there is a risk that the fibers will be crushed and hardened. The liquid holding capacity is reduced. Therefore, the width 15w of the recess 15 in the width direction is set to 2.0 mm to 3 in consideration of easiness of bending so as to project to the skin side and securing of the liquid absorbing region of the absorbent body 10 that absorbs excrement. It is preferably set to 0.0 mm.

A portion of the absorbent body 10 that is adjacent to the recess 15 from the skin side in the thickness direction is referred to as a skin-side portion H, and is a portion that overlaps the recess 15 in the width direction (a dark sandy pattern area in FIG. 8A). In addition, a portion adjacent to the skin-side portion H from the outside in the width direction is referred to as an outer portion L, which is a portion having a thickness t10 of the absorber 10 in which the point-like compressed portions ED10, 20 and the recess 15 are not formed, The skin side surface 10t and the non-skin side surface 10b of the outer portion L are substantially the same positions as the skin side surface 10t and the non-skin side surface 10b of the absorbent body 10 before processing. In this embodiment, the thickness t10 is about 1.3 mm.

At this time, the fiber density of the skin side portion H is higher than the fiber density of the outer side portion L. It is generally known that the higher the fiber density, the faster the liquid absorption by capillary action. Therefore, in the worn state (state C in FIG. 7), when bent so as to bulge to the skin side, the fiber density of the skin side portion H that abuts on the excretion opening is high, and thus excrement can be absorbed faster. .. A region of the skin-side portion H that is adjacent to the deepest portion 15m that is the deepest portion of the recess 15 from the skin side and that overlaps the deepest portion 15m in the width direction is called a high-density region DH. Since the deepest part 15m has a predetermined length (for example, about 0.8 mm) in the width direction (W in FIG. 8A), the high-density region DH includes not only the longitudinal direction but also the planar region along the width direction. Have

The center Hc in the thickness direction of the high-density region DH is located on the skin side of the center Lc in the thickness direction of the absorber 10 at the position overlapping the outer portion L in the width direction. In the present embodiment, the center Lc is substantially the same position as the center yy in the thickness direction of the absorbent body 10 before processing. As a result, at the time of wearing, even when a force is applied in the width direction by the wearer's crotch (leg), it is possible to induce bending so as to project to the skin side rather than deformation to project to the non-skin side. , The excrement can be absorbed at a position closer to the excretory mouth of the wearer.

The depth of the deepest portion 15m in the crotch portion, that is, the distance L2 in the thickness direction from the non-skin side surface 10b (the absorbent body 10 before processing) of the outer portion L of the crotch portion to the deepest portion 15m is the depth 15m from the skin. It is longer than the distance L1 in the thickness direction of the side portion H (high-density region DH) to the skin side surface 10t (L2>L1). In the present embodiment, the depth L2 of the deepest portion 15m is set to about 0.8 mm, the distance L1 in the thickness direction from the deepest portion 15m to the skin side surface 10t of the skin side portion H is set to about 0.5 mm, and compression processing is performed. The fiber density in the high density region DH is increased.

The recess 15 of the napkin 1 is formed over the entire length in the longitudinal direction. FIG. 10A is a schematic sectional view of the recess 15 in the crotch region. FIG. 10B is a schematic sectional view of the recess 15 on the rear side. It should be noted that the recess 15 in FIG. 10A is an enlarged cross-sectional view of the portion indicated by the arrow AA in FIG. 1, and the recess 15 in FIG. 10B is the enlarged cross-section of the portion indicated by the arrow D-D in FIG. It is a figure. The portion shown by the arrow D-D in FIG. 1 shows the recess 15 at the rear end of the napkin 1 in the longitudinal direction. Although the recess 15 has a high-density region DH over the entire length in the longitudinal direction, the high-density region DH is omitted in FIGS. 10A and 10B for convenience. Further, hereinafter, the recess 15 at the rear end will be described as the recess 15 at one end in the longitudinal direction of the napkin 1, but the same applies to the recess 15 at the front end as the other end in the longitudinal direction. .. The recess 15 at the rear end of the napkin 1 is the recess 15 at the rear end of the absorbent body 10.

The concave portion 15 has an upper roll 51u having a rib portion 51r that continuously projects over the entire circumference in the rotation direction, and a lower roll 51d having a groove portion 51m continuously provided in an annular shape over the entire circumference in the rotation direction. It is formed by pressing the absorbent body 10 before processing between the and. At this time, since the thickness of the absorbent body 10 in the central portion in the longitudinal direction including the crotch portion of the absorbent body 10 is larger than that of the rear side portion including the rear end portion (t10>tb10), the skin side portion H in the crotch portion Is squeezed more strongly than the skin side portion H at the rear end portion, and the fiber density of the skin side portion H at the crotch portion is higher than the fiber density at the rear end portion. Similarly, the fiber density of the high-density region DH in the crotch portion is higher than the fiber density of the high-density region DH in the rear end portion.

The fiber densities of the skin side part H in the crotch part and the skin side part H in the rear end part are not always constant. The napkin 1 has the highest fiber density in the high-density region DH in each skin-side part H, and the fiber density in the part adjacent to the outer part L is low. Further, the fiber density in the skin-side portion H may be partially different depending on the degree of contact with the rolls 51u and 51d when the recess 15 is formed. Therefore, when the fiber density of the skin side part H is not constant, the "fiber density of the skin side part H" means the average fiber density in the whole skin side part H. Then, the average fiber density in the entire skin-side portion H of the crotch portion is compared with the average fiber density in the entire skin-side portion H of the rear end portion. Specifically, similar to the above-mentioned method, it is possible to measure and compare by a known method. For example, the crotch region and each skin-side region H (the range of the width 15w in the width direction) at the rear end are cut out from the napkin 1 as a sample having a predetermined length (10 mm) in the longitudinal direction, and The mass was measured with a direct balance (for example, electronic balance HF-300 manufactured by Kensei Kogyo Co., Ltd.), and the area of each skin-side portion H was calculated using an image obtained by photographing a cross section of the napkin 1 cut in the width direction. By dividing the mass of each sample by the product of the area of each skin-side part H and a predetermined length (10 mm) cut out as a sample, the fiber density of each skin-side part H can be calculated and compared. it can.

Regarding the comparison of the fiber densities of the skin-side parts H, it is only necessary to specify the size relationship, and it is not necessary to calculate each mass, each area, and the like. For example, in the napkin 1, the density of the absorbent body 10 before forming the concave portions 15 (before processing) is substantially uniform, and the mass of the fibers per unit area of the crotch is the fibers per unit area of the rear side portion. Is about 1.4 times the mass of. Then, when each sample of the crotch region and the rear end is cut out from the napkin 1 in the same manner as described above, the mass of the sample at the crotch region is about 1.4 times the mass of the sample at the rear end. .. In the image of the cross section of each sample in this case, the area of the sample at the crotch region and the area of the sample at the rear end are visually compared, and the area of the sample at the crotch region is the rear end. It can be obtained that the fiber density of the sample at the crotch region is higher than the fiber density of the sample at the rear end when it is clearly smaller than 1.4 times the area of the sample at the rear part.

The higher the fiber density of the skin-side portion H of the absorbent body 10, the higher the rigidity of the skin-side portion H, and the more easily the bending deformation of the absorbent body 10 starts from the recess 15. In the napkin 1, by increasing the fiber density of the skin side part H in the crotch part located in the crotch part of the wearer, when a force is applied in the width direction by the crotch (leg) of the wearer. In addition, it becomes easy to bend the absorbent body 10 so as to bulge to the skin side starting from the concave portion 15 in the crotch region. On the other hand, when worn, the rear side does not need to be deformed so that the crotch part is raised toward the skin side, so that the fiber density of the skin side part H at the rear end part is equal to that of the skin side part H of the crotch part. By making the density lower than the fiber density, the back side portion can gently deform the absorber 10 along the shape of the buttocks of the wearer when worn. As described above, the napkin 1 can be deformed according to the shape of the wearer's body when worn, and the absorber 10 is fitted to the wearer's excretion opening to absorb the excrement more quickly while wearing the wearer. It is possible to further reduce the uncomfortable feeling when wearing the napkin 1.

Further, since the fiber density of the skin side part H in the crotch part is higher than the fiber density of the skin side part H of the front and rear ends, the excretion absorbed by the capillary action is It becomes easier to stay in the skin-side part H in the crotch part than in the skin-side part H of the end part. In the napkin 1, excrement is likely to stay at the skin side portion H in the central portion in the longitudinal direction. For this reason, the excrement is less likely to diffuse up to the skin-side portions H of the front and rear sides in the longitudinal direction, and it is easy to provide the front and rear sides of the napkin 1 with areas where the excrement does not adhere. Therefore, when the wearer disposes of the napkin 1 after use, it is possible to reduce the risk that the wearer soils his/her hands with excrement.

The method of forming the recessed portion 15 is performed by the rib portion 51r that continuously protrudes over the entire circumference in the rotation direction on the unprocessed absorbent body 10 having the regions where the masses of the fibers per unit area are different as described above. The method is not limited to the method of performing the squeezing process with the upper roll 51u having the above and the lower roll 51d having the groove portion 51m continuously provided in an annular shape over the entire circumference in the rotation direction. For example, an unrolled absorbent body 10 in which the mass of fibers per unit area is substantially constant is provided with an upper roll provided with rib portions having different protruding heights in the rotation direction and a groove portion continuous over the entire circumference in the rotation direction. Appropriate changes can be made, such as performing compression processing using the pair of rolls provided.

Further, the concave portion 15 of the napkin 1 is formed not only in the crotch portion of the absorbent body 10 but also over the entire length in the longitudinal direction, and is located on the front side portion or the back side portion located on the abdomen of the wearer when worn. Since the concave portion 15 is also provided, the crotch portion is deformed so as to project to the skin side by the concave portion 15, while the front and rear end portions of the concave portion 15 are arranged along the wearer's body. The shape can be changed gently.

Further, the cross-sectional shape of the recess 15 along the width direction in the crotch portion (FIG. 10A) is different from the cross-sectional shape of the recess 15 along the width direction at the rear end (FIG. 10B). Specifically, the recess 15 at the crotch portion and the recess 15 at the rear end have a widthwise length 15w that is substantially the same, and any of the deepest portions 15m has a widthwise length W that is substantially the same. Is. However, the depth (L2) of the deepest portion 15m of the recess 15 at the crotch portion is deeper than the depth (L5) of the deepest portion 15m of the recess 15 at the rear end (L2>L5). The depth of the deepest portion 15m of the recess 15 at the rear end is the distance L5 in the thickness direction from the non-skin side surface 10b of the outer portion L of the rear end to the deepest portion 15m. This is because, like the above-mentioned fiber density, the method of forming the recess 15 and the mass of the fiber per unit area of the absorber 10 are different.

Thus, the cross-sectional shape of the recessed portion 15 along the width direction at the crotch portion and the cross-sectional shape of the recessed portion 15 at the rear end portion along the width direction are different, so that the absorber 10 in the crotch portion at the time of wearing. The change in the shape of the absorbent body 10 and the change in the shape of the absorber 10 at the rear end can be made different. In particular, as in the napkin 1, by making the depth (L2) of the deepest portion 15m of the concave portion 15 at the crotch portion deeper than the depth (L5) of the deepest portion 15m of the concave portion 15 at the rear end, The concave portion 15 of the portion becomes a deeper groove, and can be formed into a mountain shape that is firmly projected to the skin side when worn. On the other hand, the recess 15 at the rear end is not required to have a mountain-like shape as compared to the crotch region. Therefore, the recess 15 having a groove shallower than the crotch region is formed so that it can easily follow the wearer's buttocks. ing.

Further, although a pair of skin-side concave portions P are provided on both outer sides in the width direction of the high-density region DH in the central portion of the absorbent body 10 in the longitudinal direction (FIG. 10A and the like), the front-side portion and the rear-side portion are provided. Does not have a pair of skin-side recesses P (FIG. 10B). Each skin-side recess P is provided on the skin side surface of the absorber 10 along the longitudinal direction.

FIG. 8B is an enlarged view of a portion Z in FIG. 8A. FIG. 8B shows a state in which the virtual straight line V is brought close to the cross section of the napkin 1 (absorbent body 10) along the width direction, and the virtual straight line V and the absorbent body 10 are in contact with each other at two points. The skin-side concave portion P is a groove formed by squeezing, and in the state of the napkin 1 before use, one of two points on the skin side surface 10t of the absorber 10 where the virtual straight line and the absorber 10 are in contact with each other. Is the depression start point, and the other is the depression end point. The width Wp of each skin-side recess P is shorter than the width 15w of the recess 15 in the width direction. Specifically, the length Wp is preferably 0.3 mm to 1.2 mm, and in the present embodiment, the length Wp is about 0.8 mm. As a result, the absorbent body 10 is guided to bend toward the skin side by the recess 15 having a longer width, and the absorbent body 10 is guided to bend toward the non-skin side by the skin-side recess P having a shorter width. can do.

The depth of the skin-side concave portion P refers to the distance L3 between the virtual straight line V and the skin-side deepest portion Pm (FIG. 8B). At this time, the depth (L3) of the skin side concave portion P is the depth of the deepest portion 15m of the concave portion 15, that is, the deepest portion from the non-skin side surface 10b of the skin side surface 10b of the outer part L (the absorbent body 10 before processing). It is smaller than the distance L2 in the thickness direction up to 15 m (L3<L2). Specifically, in this embodiment, the depth (L3) of the skin-side deepest part Pm is about 0.2 mm, and the depth (L2) of the deepest part 15 m is about 0.8 mm. The depth of the skin-side recess P is the distance L3 between the skin-side deepest part Pm and the virtual straight line V, but as shown in FIG. 8B, the top sheet 20 and the skin-side deepest part Pm are bonded. If not, the depth of the skin-side deepest part Pm is almost equal to the distance between the top sheet 20 and the skin-side deepest part Pm.

Since the crotch portion has a pair of skin-side recesses P, when the absorbent body 10 is bent so that the skin-side portion H bulges to the skin side in the worn state (state C in FIG. 7), the skin-side portion H The region between the skin-side recessed portions P among them becomes a portion that comes into contact with the wearer's skin (FIG. 9B ), and wears a high-density region DH that is closer to a flat surface than in the case without the skin-side recessed portion P. It can be brought into contact with the person's skin, and the skin contact can be improved. In the front side portion and the rear side portion, since it is less necessary to bring the flat surface portion of the recessed portion 15 raised on the wearer's skin into contact with the wearer's skin, the pair of skin side recessed portions P are formed on the rear side (front side). Need not be provided at one end of the.

Further, as shown in FIG. 1, in the crotch region, since the linear compressed portion EL crossing the recess 15 in the width direction is not provided, the recess 15 along the longitudinal direction raises the absorber 10 to the skin side. It is possible to reduce the risk of the bending deformation being obstructed by the linear compressed portion EL that traverses in the width direction, and to make it easily bulge to the skin side at the crotch portion. In the napkin 1, the linear compressed portion EL is a portion that is subjected to compression processing stronger than the concave portion 15. When the linear compressed portion EL is provided so as to traverse the concave portion 15 in the width direction, the absorbent body by the concave portion 15 is formed. The deformation of the absorbent body 10 (napkin 1) due to the linear compressed portion EL may appear more strongly than the deformation of 10. In other words, when the linear compression portion EL is provided so as to cross the recess 15 in the width direction, there is a possibility that the mountain fold shape may be formed along the width direction instead of the mountain fold shape along the recess 15. Therefore, in the crotch region, in order to easily raise the absorber 10 to the skin side in the concave portion, the linear compressed portion EL that crosses the concave portion 15 in the width direction is not provided, and is absorbed in the excretory mouth of the wearer. Made it easier to fit the body 10.

On the other hand, on the front side of the napkin 1, a linear compression portion ELf that crosses the front side of the recess 15 in the width direction is provided, and on the rear side of the napkin 1, the linear compression portion ELb that crosses the recess 15 in the width direction. Is provided. The front side and the rear side of the napkin 1 do not have to be raised to the skin side as much as the crotch region, and it may be preferable to have a shape that conforms to the shape of the abdomen and buttocks of the wearer rather than protruding to the skin side. Therefore, on the front side and the rear side of the napkin 1, it is possible to easily conform to the shape of the body by providing the linear squeezed portions ELf and ELb that cross the recess 15 in the width direction.

=== Other Embodiments ===
Although the embodiments of the present invention have been described above, the above embodiments are for the purpose of facilitating the understanding of the present invention and are not for limiting and interpreting the present invention. Further, it is needless to say that the present invention can be modified or improved without departing from the spirit of the invention and that the present invention includes equivalents thereof. For example, the following modifications are possible.

In the above-described embodiment, the recess 15 is formed over the entire length of the absorbent body 10 in the longitudinal direction, but the present invention is not limited to this. At least when worn, the crotch portion, which is a position corresponding to the wearer's crotch, and the recess 15 at one end (for example, the rear end) or the other end (for example, the front end) of the napkin 1 in the longitudinal direction. May be provided. By providing the crotch portion and the concave portion 15 on either one of the one end portion and the other end portion, the crotch portion in the central region in the width direction of the napkin 1 can be easily protruded to the skin side, and the wearer's buttocks or abdominal portion The absorber 10 can be deformed so as to follow the shape. However, like the napkin 1, by forming the recesses 15 in the crotch region and both ends in the longitudinal direction and forming the recesses over the entire length of the absorber 10, the absorber 10 extends from the abdominal side to the buttocks. Since it can conform to the shape of the wearer's body, it can be fitted to the wearer's body.

Further, in the above-described embodiment, as shown in FIG. 6, the rib portion 51r of the upper roll 51u is pushed into the groove portion 51m of the lower roll 51d, and the top surface 51rt comes into contact with the thinnest portion of the absorber 10. However, the present invention is not limited to this. FIG. 11 is a modification of the pair of roll portions 50. As shown in FIG. 11, the clearance between the rib portion 51r of the upper roll 51u and the groove portion 51m of the lower roll 51d is changed so that the slope of the rib portion 51r and the slope of the groove portion 51m are not in contact with the top surface 51rt. The thickness of the absorber 10 in the sandwiched region may be the smallest. As a result, it is possible to reduce the risk that the part that comes into contact with the skin of the wearer when it is worn will be strongly squeezed and hardened, and thus the feel of the skin can be improved.

In the above-described embodiment, the skin side portion H is projected to the skin side, but the present invention is not limited to this. In the state before wearing, the skin side surface 10t of the skin side portion H may be recessed toward the non-skin side from the skin side surface 10t of the outer side portion L. Also in this case, the absorbent body 10 can be made to project to the skin side in the concave portion 15 to fit the excretory opening of the wearer.

Further, in the above-described embodiment, the pair of skin-side concave portions P are provided on both outer sides in the width direction of the high-density region DH in the central portion in the longitudinal direction of the absorber 10, but the present invention is not limited to this. Absent. Even if it does not have a pair of skin-side recesses P, if the fiber density of the skin-side part H in the crotch part is higher than the fiber density of the skin-side part H in one longitudinal end, the absorbent body 10 in the crotch part is It is possible to deform according to the shape of the wearer's abdomen or buttocks while ensuring fit.

1 sanitary napkin (napkin), 10 absorbent body, 10t skin side surface, 10b non-skin side surface, 11 absorbent core, 12 upper sheet, 13 lower sheet, 15 recess, 15m deepest portion, 20 top sheet (skin side sheet) , 20e outer peripheral edge portion, 20w wing portion, 30 back sheet (non-skin side sheet), 30e outer peripheral edge portion, 30w wing portion, 40c main body adhesive portion, 40w wing adhesive portion, 50 pair of roll portions, 51u upper roll, 51d Lower roll, 51r rib portion, 51m groove portion, 51rt top surface, 51mb bottom surface, 201K crotch, 201He excretion opening, DH high-density region, ED10 absorber point-shaped compression section, ED20 main body point-shaped compression section, EL linear compression section ( Squeezed part), H skin side part, L outer part, HMA adhesive, P skin side recessed part, Pm skin side deepest part

Claims (8)

Provided with a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other,
An absorbent article having an absorbent body having liquid absorbent fibers,
The absorber has a concave portion along the longitudinal direction in a central region including a central position in the width direction,
The fiber density of the skin side portion adjacent to the recess in the thickness direction from the skin side is higher than the fiber density of the outer portion adjacent to the recess in the width direction from the outside,
The fiber density of the skin-side part in the crotch part located in the crotch part when worn is higher than the fiber density of the skin-side part in the one end in the longitudinal direction,
The absorbent article is characterized in that the thickness of the absorber at the crotch portion is larger than the thickness of the absorber at the one end . The absorbent article according to claim 1,
At the position where the deepest deepest portion of the recess in the crotch portion and the width direction overlap, the center of the absorbent body in the thickness direction,
An absorbent article, characterized in that the absorbent article is located on the skin side from a center of the absorbent body in the thickness direction at a position overlapping the outer region in the width direction. The absorbent article according to claim 1 or 2,
The said recessed part is provided from one end to the other end of the said absorber in the said longitudinal direction, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 3,
The mass of the liquid absorbent fiber per unit area of the skin side portion in the crotch portion,
An absorbent article characterized by having a larger mass than the liquid absorbent fiber per unit area of the skin side portion at the one end. The absorbent article according to any one of claims 1 to 4,
An absorbent article, wherein a cross-sectional shape of the recess along the width direction at the crotch portion is different from a cross-sectional shape of the recess along the width direction at the one end. The absorbent article according to any one of claims 1 to 5,
The deepest deepest part of the said recessed part in the said crotch part is deeper than the deepest deepest part of the said recessed part in the said one end part, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 6,
In the crotch region,
On the skin surface side of the absorber, a pair of skin-side recesses along the longitudinal direction are provided,
In the width direction, the pair of skin-side recesses are shallower than the deepest deepest part of the recess, and are provided on both outer sides of the deepest part,
The absorbent article, wherein the skin side recess is not provided at the one end. The absorbent article according to any one of claims 1 to 7,
The absorbent article is characterized in that, in the crotch region, a squeezing portion that crosses the recess in the width direction is not provided.

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