JP2024091084A - Body fluid absorption sheet - Google Patents

Abstract

To provide a body fluid-absorbing sheet which easily follows a wearer's movement and is capable of reducing generation of twisting or the like.SOLUTION: In a body fluid-absorbing sheet 100 extending in a longitudinal direction, flexural rigidity of a central part 91 in the longitudinal direction is greater than flexural rigidity of a part on an end side in the longitudinal direction of the central part 91.SELECTED DRAWING: Figure 1

Description

This disclosure relates to a bodily fluid absorbing sheet.

Patent Document 1 discloses a conventional bodily fluid absorbing sheet. In the bodily fluid absorbing sheet described in Patent Document 1 (referred to as a bodily fluid absorbing pad in Patent Document 1), the top sheet, absorbent, and back sheet are stacked together and fixed together by pressing the outer periphery of the bodily fluid absorbing pad. The bodily fluid absorbing pad is not pressed in any part other than the outer periphery of the top sheet.

JP 2020-89424 A

However, the bodily fluid absorbing pad described in Patent Document 1 has a substantially uniform rigidity over its entire surface. As a result, the bodily fluid absorbing pad described in Patent Document 1 is prone to movement as a whole in response to the movement of the wearer's legs, and is therefore unable to follow the wearer's movements, resulting in sagging and slippage.

The objective of this disclosure is to provide a bodily fluid absorbent sheet that easily follows the movements of the wearer and reduces the occurrence of wrinkles, etc.

The present disclosure relates to a bodily fluid absorbent sheet. The bodily fluid absorbent sheet of the present disclosure is a bodily fluid absorbent sheet extending in the longitudinal direction, characterized in that the bending stiffness of the central portion in the longitudinal direction is higher than the bending stiffness of the portion closer to the end portion in the longitudinal direction than the central portion.

The bodily fluid absorbent sheet of the present disclosure preferably has an embossed portion formed on the skin-facing surface, and can be configured so that the proportion of the area of the embossed portion to the surface area of the central portion is greater than the proportion of the area of the embossed portion to the surface area of the end portions.

In the body fluid absorbent sheet of the present disclosure, the embossed portion can preferably be configured to have a lattice-shaped embossment formed in the central portion.

In the body fluid absorbent sheet of the present disclosure, the lattice-shaped embossing can preferably be configured to be formed in the central region in the width direction of the body fluid absorbent sheet.

The body fluid absorbent sheet of the present disclosure can preferably be configured to have linear embossments formed at the boundary between the central portion and the end portion on the skin-facing surface and extending in a direction intersecting the longitudinal direction.

The bodily fluid absorbent sheet of the above aspect according to the present disclosure can easily follow the movements of the wearer, reducing the occurrence of wrinkles, etc.

Fig. 1(A) is a plan view of a bodily fluid absorbent sheet according to an embodiment, and Fig. 1(B) is a cross-sectional view taken along line AA of Fig. 1(A). FIG. 4 is an explanatory diagram for explaining a method for measuring the bending rigidity of the body fluid absorbent sheet.

<Embodiment>
A bodily fluid absorbent sheet 100 according to this embodiment will be described with reference to the drawings. The bodily fluid absorbent sheet 100 absorbs bodily fluids from a wearer. The bodily fluid absorbent sheet 100 according to this embodiment is attached to the wearer's clothing (including underwear) or skin. Examples of the bodily fluid absorbent sheet 100 include a vaginal discharge sheet (panty liner), a sanitary napkin, an incontinence pad, an underarm sweat pad, a sweat absorbing sheet, and the like. Examples of the bodily fluid absorbed by the bodily fluid absorbent sheet 100 include vaginal discharge, menstrual blood, sweat, urine, and the like. In this embodiment, as shown in FIG. 1, a vaginal discharge sheet will be described as an example of the bodily fluid absorbent sheet 100.

In the following description, the longitudinal direction of the bodily fluid absorbent sheet 100 is defined as the "front-rear direction," and the direction along the bodily fluid absorbent sheet 100 that is perpendicular to the front-rear direction is defined as the "width direction." In this specification, "parallel" includes not only cases where two straight lines, sides, surfaces, etc. do not intersect even when extended, but also cases where the angle between the two straight lines, sides, surfaces, etc. is within a range of 5°.

The bodily fluid absorbent sheet 100 is made up of multiple sheets stacked together. The multiple sheets preferably include a top sheet 1, a back sheet 2, and an absorbent sheet 3. In this embodiment, the surface of the bodily fluid absorbent sheet 100 that faces the wearer's skin is defined as the "front surface," and the opposite surface is defined as the "rear surface." In addition to the top sheet 1, the back sheet 2, and the absorbent sheet 3, the bodily fluid absorbent sheet 100 may also include other sheets, such as a compression recovery sheet. The bodily fluid absorbent sheet 100 may also be a single layer. The bodily fluid absorbent sheet 100 according to this embodiment will be described as a multilayer structure in which the top sheet 1, the back sheet 2, and the absorbent sheet 3 are stacked together.

(Top sheet 1)
The top sheet 1 includes a surface facing the wearer's skin (sometimes referred to as "skin facing surface 11"). In this embodiment, the top sheet 1 comes into contact with the wearer's skin. The top sheet 1 is liquid permeable. As used herein, "liquid permeable" refers to the property of allowing bodily fluids to pass through in the thickness direction. Bodily fluids released from the wearer pass through the top sheet 1 and reach the absorbent sheet 3.

Examples of the top sheet 1 include woven fabrics, knitted fabrics, nonwoven fabrics, and felts. It is preferable to use a nonwoven fabric for the top sheet 1. By using a nonwoven fabric for the top sheet 1, it is possible to reduce the loss of texture and reduce irritation to the skin. It is preferable to manufacture the nonwoven fabric by a method such as the spunlace method, the thermal bond method, the air-through method, the air-laid method, the needle punch method, or the spunbond method. By manufacturing the nonwoven fabric by these methods, the texture of the top sheet 1 is improved. In addition, since no adhesive or solvent is used, it is safer for the skin.

Examples of materials for the top sheet 1 include synthetic fibers, semi-synthetic fibers, and fibers made of a mixture of various fibers (e.g., blends and mixed fibers). Examples of synthetic fibers include cotton, silk, pulp, wool, and hemp. Examples of semi-synthetic fibers include polyester fibers, polyamide fibers, acrylic fibers, polypropylene fibers, polyethylene/polyester composite fibers, and polyethylene/polypropylene composite fibers. By using cellulosic fibers such as cotton, rayon fibers, and acetate fibers as the material for the top sheet 1, the top sheet 1 can be made to have excellent moisture absorption properties. This allows the moisture on the surface of the wearer's skin to be kept at an appropriate level, and the fibers themselves absorb moisture and become soft, reducing friction with the skin and reducing the generation of static electricity. Cotton, a natural fiber, feels good on the skin and is less irritating to the skin (less likely to cause rashes), so by using cotton as the cellulosic fiber, a body fluid absorbent sheet 100 that is gentle on the skin and has excellent comfort can be made.

The top sheet 1 preferably contains cotton and thermoplastic synthetic fibers. By containing thermoplastic synthetic fibers, the thermoplastic synthetic fibers tend to melt when embossed by the embossed portion. This makes it easier for the top sheet 1 and the absorbent sheet 3 and/or the back sheet 2 to be welded by the embossed portion. Even in this case, as mentioned above, it is preferable to mix 50% or more cotton. This allows for a bodily fluid absorbent sheet 100 that is gentle on the skin and has excellent comfort, even while having an embossed portion.

The top sheet 1 may be a single layer or multiple layers. In a multiple layer top sheet 1, for example, a sheet made of cellulosic fibers (preferably cotton) is placed on the surface facing the wearer's skin, and a sheet made of thermoplastic synthetic fibers is placed on the side facing the absorbent sheet 3.

(Back seat 2)
The back sheet 2 prevents bodily fluid absorbed in the absorbent sheet 3 from penetrating to the back side. The back sheet 2 includes the back side of the bodily fluid absorbent sheet 100. The back sheet 2 is liquid impermeable. In this specification, "liquid impermeable" refers to the property of preventing the passage of bodily fluid in the thickness direction.

Examples of the back sheet 2 include a liquid-impermeable film, a liquid-impermeable nonwoven fabric, and a sheet in which a resin film is laminated onto a nonwoven fabric. Examples of the resin film include polyethylene, polypropylene, polyester, nylon, polyvinyl alcohol, cellophane, polyvinyl chloride, etc., or a laminate film of these.

An adhesive layer is preferably provided on the back surface of the back sheet 2. The body fluid absorbent sheet 100 is attached to clothing or the like by the adhesive layer. The adhesive layer is provided, for example, by applying an adhesive to the back sheet 2. Examples of adhesives include water-soluble adhesives such as acrylic water-soluble adhesives, and non-water-soluble adhesives such as rubber-based hot melts. The adhesive layer may be provided over the entire surface of the back sheet 2, or may be provided partially in the front-rear direction.

(Absorption sheet 3)
The absorbent sheet 3 absorbs bodily fluids and retains the absorbed bodily fluids. The absorbent sheet 3 is disposed between the top sheet 1 and the back sheet 2. The absorbent sheet 3 is preferably made of a nonwoven fabric containing natural and synthetic fibers. This makes it easy to produce a bodily fluid absorbent sheet 100 that is pleasant to the touch and has excellent absorbency. The absorbent sheet 3 may be made of, for example, a fibrous assembly having a sheet structure such as a woven fabric, knitted fabric, nonwoven fabric, or pulp product, as well as absorbent materials such as water-absorbent pulp and water-absorbent polymers.

Examples of natural fibers include cotton, silk, pulp, wool, and hemp. As natural fibers, cellulosic fibers such as cotton or pulp that do not contain protein components are preferred. By using cellulosic fibers, the absorbent sheet 3 can have excellent absorbency. Furthermore, by using cellulosic fibers in the absorbent sheet 3, it is less likely to cause contact dermatitis such as allergies on the wearer's skin, and is less likely to cause rashes.

Examples of synthetic fibers include nylon fibers, polyethylene fibers, polyester fibers, polyamide fibers, acrylic fibers, polyvinyl alcohol fibers, polypropylene fibers, polyethylene terephthalate fibers, ethylene vinyl acetate fibers, and urethane fibers. In addition, examples of synthetic fibers include semi-synthetic fibers, blends of various fibers, and blended fibers. Examples of semi-synthetic fibers include rayon fibers, acetate fibers, and cupra. In terms of dryness and texture, it is preferable to use synthetic fibers such as ethylene vinyl acetate fibers, polypropylene fibers, polyethylene fibers, polyester fibers, and polyethylene terephthalate fibers, or composite fibers thereof. Examples of composite fibers include polyethylene/polyester (including polyethylene terephthalate) composite fibers, polyethylene/polypropylene composite fibers, and ethylene vinyl acetate/polypropylene composite fibers. These may be used alone or in combination of two or more. An example of a combination of two or more types is a combination of cellulosic fibers and composite fibers.

Examples of methods for manufacturing the nonwoven fabric used in the absorbent sheet 3 include the spunlace method, thermal bond method, air-through method, air-laid method, needle punch method, and spunbond method. These methods can produce an absorbent sheet 3 with a good texture. In addition, these methods do not use adhesives or solvents, so they can produce a bodily fluid absorbent sheet 100 that is safe for the wearer's skin.

The absorbent sheet 3 may be rectangular in plan view, or may have an outer edge that follows the outer edge of the top sheet 1 (and back sheet 2). The absorbent sheet 3 may be the same size as the top sheet 1 (and back sheet 2), or may have a similar shape.

(Body fluid absorbent sheet 100)
As shown in Fig. 1, the body fluid absorbent sheet 100 extends in the front-rear direction and in the width direction. The maximum length of the body fluid absorbent sheet 100 in the front-rear direction is longer than the maximum length in the width direction. The maximum length of the body fluid absorbent sheet 100 in the front-rear direction is preferably 2 to 5 times, and more preferably 2.2 to 4 times, the maximum length in the width direction. The initial thickness of the body fluid absorbent sheet 100 is preferably 0.5 to 5 mm. The "initial thickness" refers to the thickness of the body fluid absorbent sheet 100 before it absorbs body fluid and when no load is applied.

The bodily fluid absorbent sheet 100 has a front edge 4, a rear edge 5, and a pair of side edges 6. Adjacent edges of the front edge 4, rear edge 5, and pair of side edges 6 are smoothly connected. The front edge 4 extends in the width direction. The front edge 4 is preferably formed in an arc shape that protrudes forward. However, the front edge 4 may also be formed in a straight line in the width direction.

The rear edge 5 extends along the width direction. The rear edge 5 is preferably formed in an arc shape that protrudes to the rear. However, the rear edge 5 may also be formed in a straight line along the width direction. The radius of curvature of the rear edge 5 may be the same as the radius of curvature of the front edge 4, or may be different.

The side edges 6 extend along the front-to-rear direction. Each side edge 6 has multiple (three) protrusions 61 that protrude laterally. The multiple protrusions 61 are arranged at regular intervals in the front-to-rear direction. Each protrusion 61 has two intersections with an imaginary line parallel to the center line C1. In this specification, the "center line C1" refers to an imaginary line that passes through the center in the width direction and is parallel to the front-to-rear direction.

The top of each protrusion 61 is preferably rounded. The radius of curvature of the top 63 of the protrusion 61 is, for example, 5 mm or more and 20 mm or less, more specifically, 8 mm or more and 15 mm or less.

It is preferable that there is a smooth continuation between adjacent protrusions 61. This reduces stress concentration and reduces sharp bending between adjacent protrusions 61. Each side edge 6 according to this embodiment has multiple protrusions 61, and is formed in a wavy shape by having a smooth continuation between adjacent protrusions 61. It is preferable that the external shape of the bodily fluid absorbent sheet 100 is symmetrical with respect to the center line C1.

The bending stiffness of the longitudinal center portion 91 of the bodily fluid absorbent sheet 100 is higher than the bending stiffness of the longitudinal outer portions 92, 93 of the longitudinal center portion 91. Here, as shown in FIG. 1, in the longitudinal direction of the bodily fluid absorbent sheet 100, two points (points P1, P2) are taken at a certain distance from the center of the center line C1, and the skin-facing surface 11 is divided into three regions by imaginary lines parallel to the width direction passing through points P1 and P2. In this case, the "longitudinal center portion 91" in this specification refers to the middle region of the three regions aligned in the longitudinal direction. The distance from point P1 to point P2 is preferably 90% or more and 120% or less, more preferably 93% or more and 110% or less, and even more preferably 95% or more and 105% or less, of the maximum width of the bodily fluid absorbent sheet 100. In this embodiment, the distance from point P1 to point P2 is set to 40 mm or more and 70 mm or less. Hereinafter, the area located forward of the longitudinal center portion 91 will be referred to as the "front end portion 92," and the area located rearward of the longitudinal center portion 91 will be referred to as the "rear end portion 93."

The bending stiffness in this specification means the bending stiffness measured by the following method. Figure 2 shows an explanatory diagram for measuring the stiffness of the central portion 91. Here, the neutral axis M1 at the position where the bending stiffness is measured extends in the width direction. In the longitudinal direction, a portion on one side of the neutral axis M1 (the front end portion 92 in Figure 2) is held, and the other portion (the rear end portion 93 in Figure 2) is moved so as to rotate around the neutral axis M1. At this time, the force required to rotate the other portion is evaluated as the bending stiffness. The bending stiffness in each portion 91, 92, 93 means the average value of the bending stiffness in the corresponding portions 91, 92, 93. For example, a KES-FB2S (manufactured by Kato Tech Co., Ltd.) is used as the device used for the measurement.

The bending stiffness of the central portion 91 is preferably 1.0 gf·cm ² /cm or more. The bending stiffness of the central portion 91 is preferably 1.0 gf·cm ² /cm or more and 1.5 gf·cm ² /cm or less, more preferably 1.05 gf·cm ² /cm or more and 1.45 gf·cm ² /cm or less, and even more preferably 1.1 gf·cm ² /cm or more and 1.4 gf·cm ² /cm or less. The bending stiffness of each of the front end portion 92 and the rear end portion 93 is preferably 0.95 gf·cm ² /cm or less. By configuring in this way, a bodily fluid absorbent sheet 100 is obtained that is composed of a taut central portion 91 and flexible front end portion 92 and rear end portion 93.

When such a bodily fluid absorbent sheet 100 is worn, the central portion 91 is firm and does not move easily, making it easy for it to serve as a fulcrum when the wearer moves. This allows the front end portion 92 and/or the rear end portion 93 to move easily around the central portion 91, making it easy for them to follow the wearer's movements. This allows the wearer to reduce at least one of the twisting and shifting of the bodily fluid absorbent sheet 100 (hereinafter referred to as twisting, etc.).

The bending stiffness of the central portion 91 is preferably increased by the embossed portion. In the bodily fluid absorbent sheet 100 according to this embodiment, the ratio of the area of the embossed portion to the surface area of the central portion 91 is set to be greater than the ratio of the area of the embossed portion to the surface area of each of the front end portion 92 and the rear end portion 93. The ratio of the area of the embossed portion to the surface area of the central portion 91 is preferably, for example, 10% to 90%, more preferably 15% to 60%, and even more preferably 20% to 50%. The ratio of the area of the embossed portion to the surface area of each of the front end portion 92 and the rear end portion 93 is preferably, for example, 0% to 10%, and more preferably 0% to 5%. In this way, the bending stiffness of the central portion 91 is increased by the embossed portion, so that the feel of the material of the top sheet 1 can be maintained, and the feeling of use of the bodily fluid absorbent sheet 100 is not easily impaired.

The multiple sheets (top sheet 1, absorbent sheet 3, and back sheet 2) are fixed together in an overlapping state by the embossed portion. The embossed portion is formed by embossing the skin-facing surface 11 of the top sheet 1. In other words, the embossed portion is formed on the skin-facing surface 11. The thickness of the embossed portion is thinner than the thickness of the other portions. The bodily fluid absorbent sheet 100 according to this embodiment has, as shown in FIG. 1, a grid-shaped embossment 81 and multiple linear embossments 83 as the embossed portion.

The lattice-shaped embossing 81 is formed in a lattice shape in a plan view. The lattice-shaped embossing 81 is composed of a plurality of embossments that extend at an angle relative to the center line C1. However, the lattice-shaped embossing 81 may be composed of embossments that extend parallel to the center line C1 and embossments that extend in a direction perpendicular to the center line C1. Each embossment that constitutes the lattice-shaped embossing 81 may be formed continuously from one end to the other end, or may be formed intermittently.

It is preferable that the lattice-shaped embossment 81 is formed only in the central region in the width direction. The central region in the width direction means a region having a constant width with the center line C1 as the axis of symmetry. The constant width is preferably 20% to 50% of the maximum width of the central portion 91 of the bodily fluid absorbent sheet 100, more preferably 25% to 40%, and even more preferably 30% to 35%. Since the lattice-shaped embossment 81 is formed in the central region in the width direction of the bodily fluid absorbent sheet 100, both ends in the width direction of the central portion 91 are easily moved relative to the central region. As a result, when the bodily fluid absorbent sheet 100 is worn, the vicinity of the side edge 6 close to the wearer's legs is easily able to follow the movement of the legs, with the region in which the lattice-shaped embossment 81 is formed as a fulcrum. However, the lattice-shaped embossment 81 may be formed over the entire length of the central portion 91 in the width direction.

The embossed portion formed in the central portion 91 does not have to be a lattice-shaped embossment 81. For example, it may be a plurality of embossments extending parallel to or intersecting the center line C1. The embossed portion formed in the central portion 91 may be a dot embossment (point-shaped embossment). Examples of the embossed portion formed in the central portion 91 include a lattice-shaped, linear, and dot-shaped portion, in order of increasing effectiveness in reducing twisting and the like.

Linear embossments 83 are preferably formed at the boundary between the front end 92 and the central portion 91 and at the boundary between the rear end 93 and the central portion 91. The linear embossments 83 are embossed portions formed along one imaginary line. The imaginary line extends in a direction intersecting the center line C1 (in the present embodiment, the width direction). Therefore, the linear embossments 83 extend in a direction intersecting the center line C1. The linear embossments 83 are easier to bend than other portions. Therefore, by having the linear embossments 83 at the boundary between the front end 92 and the central portion 91 and at the boundary between the rear end 93 and the central portion 91, when the bodily fluid absorbent sheet 100 receives an external force at the side edge 6 of the bodily fluid absorbent sheet 100, the central portion 91 is more likely to become a fulcrum of movement. Each linear embossment 83 may be a solid line, a broken line, or a dotted line.

Each linear embossment 83 is preferably formed in an arc shape. The front linear embossment 83 is formed in an arc shape that protrudes to the front. The rear linear embossment 83 is formed in an arc shape that protrudes to the rear.

A pair of rear embossed portions 84 are formed at the rear end 93. The rear embossed portions 84 are formed along a virtual line inclined with respect to the center line C1 so as to be positioned outward in the width direction as they proceed rearward. The pair of rear embossed portions 84 are spaced apart from each other as they proceed rearward. The pair of rear embossed portions 84 are symmetrical with respect to the center line C1. Since the rear embossed portion 84 is formed at the rear end 93, when the bodily fluid absorbent sheet 100 is worn, if forces are applied to the pair of side edges 6 in different directions in the thickness direction, the bodily fluid absorbent sheet 100 is likely to bend along the rear embossed portion 84. As a result, when a force is applied to the bodily fluid absorbent sheet 100 in response to the movement of the wearer's legs, the bodily fluid absorbent sheet 100 is deformed along the rear embossed portion 84, so that the bodily fluid absorbent sheet 100 is likely to follow the movement of the legs. In particular, the central portion 91 serves as a fulcrum of movement, and deformation along the rear embossed portion 84 can more effectively reduce twisting of the bodily fluid absorbent sheet 100. The bodily fluid absorbent sheet 100, which has a highly rigid central portion 91 and a rear embossed portion 84, is more likely to reduce twisting of the bodily fluid absorbent sheet 100 even when the wearer walks or runs with a large stride.

In this embodiment, the front ends of the pair of rear embossed portions 84 are separated from each other, but may be connected. Also, the rear embossed portions 84 do not extend to the rear edge 5, but may extend to the rear edge 5.

A pair of side embossed portions 82 are formed on the body fluid absorbent sheet 100. The side embossed portions 82 extend in the front-to-rear direction at each of both widthwise ends. The side embossed portions 82 are formed across the rear end portion 93, the central portion 91, and the front end portion 92. The formation of the side embossed portions 82 makes it easier to create a body fluid absorbent sheet 100 with overall firmness.

(effect)
As described above, in the body fluid absorbent sheet 100 according to this embodiment, the bending stiffness in the longitudinal direction of the central portion 91 is higher than the bending stiffness of the portions closer to the longitudinal ends than the central portion 91. Therefore, when forces are applied in different directions to the pair of side edges 6 when the sheet is worn, the portions on the end sides tend to follow the movement of the wearer with the central portion 91 as a fulcrum. This reduces wrinkling of the body fluid absorbent sheet 100 when worn.

The proportion of the surface area of the embossed portion to the surface area of the central portion 91 is greater than the proportion of the surface area of the embossed portion to the surface area of the portion outside the central portion 91. In this way, the bending rigidity is adjusted by the embossed portion, so that the skin-facing surface 11 can be made of the same material as the bodily fluid absorbent sheet 100, and the feel of the bodily fluid absorbent sheet 100 is not easily impaired.

The embossed portion has a lattice-shaped embossment 81 formed in a lattice shape in the central portion 91, so that the bodily fluid absorbent sheet 100 has firmness in the central portion 91. This makes it difficult for the bodily fluid absorbent sheet 100 to move around the central portion 91 as a fulcrum, and allows the portions outside the central portion 91 to move more easily, making it easier to follow the movements of the wearer.

The lattice-shaped embossing 81 is formed in the central region in the width direction of the bodily fluid absorbent sheet 100, so that both ends in the width direction of the central portion 91 can move easily relative to the central region. As a result, the outer regions can easily follow the wearer's movements, using the central region where the lattice-shaped embossing 81 is formed as a fulcrum.

The body fluid absorbent sheet 100 has linear embossments 83 formed at the boundary between the central portion 91 and the areas on both sides of the central portion 91 on the skin-facing surface, which allows the areas on both sides of the central portion 91 to move easily with the central portion 91 as a fulcrum.

The bodily fluid absorbent sheet 100 according to this embodiment also has a rear embossed section 84. The rear embossed section 84 has a greater widthwise distance between opposing sections as it moves toward the rear. This makes it possible to more effectively reduce wrinkling of the bodily fluid absorbent sheet 100.

<Modification>
Although one embodiment of the body fluid absorbent sheet 100 of the present disclosure has been described above, the body fluid absorbent sheet 100 of the present disclosure is not limited to the above embodiment and can be modified without departing from the spirit of the present disclosure. In other words, the body fluid absorbent sheet 100 of the modified examples shown below can solve the above-mentioned problems of the present disclosure, similar to the body fluid absorbent sheet 100 of the above embodiment. The modified examples described below can be applied in appropriate combination.

In the above embodiment, the bending stiffness of the central portion 91 is increased by the embossed portion, but for example, the material of any one of the sheets may be partially changed, or the thickness of the body fluid absorbent sheet 100 may be partially changed. In addition, the bending stiffness may be adjusted by changing the thickness of the adhesive that bonds the back sheet 2 and the absorbent sheet 3, or by interposing another sheet (e.g., a compression recovery sheet) between the back sheet 2 and the absorbent sheet 3.

100 Body fluid absorbent sheet 11 Skin facing surface 81 Lattice embossed 83 Linear embossed 91 Center portion 92 Front end portion (portion on the end side in the longitudinal direction)
93 Rear end portion (portion on the end side in the longitudinal direction)
C1 Center line

Claims (5)

A longitudinally extending body fluid absorbent sheet,
The bending rigidity of the central portion in the longitudinal direction is higher than the bending rigidity of a portion closer to the end portion in the longitudinal direction than the central portion.
Body fluid absorbing sheet. An embossed portion is formed on the skin-facing surface,
a ratio of an area of the embossed portion to a surface area of the central portion is greater than a ratio of an area of the embossed portion to a surface area of the end portion;
The body fluid absorbent sheet according to claim 1. The embossed portion has a lattice-shaped embossment formed in a lattice shape in the central portion.
The body fluid absorbent sheet according to claim 2. The lattice-shaped embossment is formed in a central region in the width direction of the body fluid absorbent sheet.
The body fluid absorbent sheet according to claim 3. A linear embossment is formed on the skin-facing surface at the boundary between the central portion and the end portion, and extends along a direction intersecting the longitudinal direction.
The body fluid absorbent sheet according to any one of claims 1 to 4.

Images