JPH1033589A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article of which the liquid absorption capacitance is increased while keeping satisfactory fitness without being affected by any action at the time of wearing. SOLUTION: An absorptive article 10 has a liquid permeable front sheet 11 abutted to a wearing person, a liquid non-permeable rear sheet 12 and a liquid holding absorbing part 13 interposed between the front sheet 11 and the rear sheet 12. In this case, the absorbing part 13 is provided with an upper layered absorber 13a and a lower layered absorber 13b arranged on the side of skin non-abutting face of the upper layered absorber 12a, and the upper layered absorber 13a is formed independently of the lower layered absorber 13b, arranged practically contactless with the lower layered absorber 13b and covered with the front sheet 11 so as to freely change its phase in breadthwise direction with respect to the lower layered absorber 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to sanitary napkins, disposable diapers, incontinent pads, surgical pads, etc.
The present invention relates to an absorbent article having a liquid-permeable surface layer, a liquid-impermeable back layer, and a liquid-retentive absorbent portion interposed between the surface layer and the back layer. The present invention relates to an absorbent article that maintains good fit without being affected by the movement of the user and has a large liquid absorption capacity.

[0002]

2. Description of the Related Art In general, as absorbent articles such as sanitary napkins and disposable diapers, a liquid-permeable top sheet, a liquid-impermeable back sheet, and both the top sheet and the back sheet. Absorbent articles having a liquid retaining absorbent portion interposed between the sheet and the sheet are well known. Such an absorbent article is required to be able to be fitted well to a leaked part of body fluids such as blood and urine, and to be able to absorb and hold without leakage.

[0003] As an absorbent article that fits well to leaked parts of bodily fluids such as blood and urine, and can absorb and hold without leakage, the absorption part has conventionally been composed of a lower absorbent body and a narrower absorbent body than the lower absorbent body. It is known that the upper layer absorber is configured to be in contact with a contact part of a wearer in a shape that matches the contact part of the wearer, thereby avoiding displacement and increasing the liquid absorption capacity at the center in the width direction. As such an absorbent article having a structure in which the absorbing portion has two layers, upper and lower, those described in Japanese Patent Publication No. 5-73419 and those described in Japanese Utility Model Laid-Open No. 5-24025 are available. In the absorbent article described in Japanese Patent Publication No. 5-73419, the upper layer absorber and the lower layer absorber are individually covered with a surface sheet and fixed to each other at both ends in the longitudinal direction. In the absorbent article described in Japanese Utility Model Application Laid-Open No. 5-24025, the upper layer absorber and the lower layer absorber are individually covered with a surface sheet, and are adhesively fixed at both ends in the longitudinal direction and a central portion in the longitudinal direction.

[0004] However, the above-mentioned absorbent articles have the following problems. That is, Japanese Patent Publication No. 5-73419.
In the absorbent article described in the official gazette, by the action of the wearer,
At the center in the longitudinal direction, the relative position in the width direction between the upper absorber and the lower absorber is shifted and does not return as it is, and the body fluid may be unevenly absorbed / distributed to cause leakage. Actual Kaihei 5
In the absorbent article described in -24025, the upper absorbent body and the lower absorbent body are integrated, so when the wearer's movement is severe, the entire absorbent body is displaced,
Leakage may occur.

[0005] Accordingly, it is an object of the present invention to provide an absorbent article having a good liquid absorption capacity, which retains a good fit without being affected by the operation of the wearer at the time of wearing.

[0006]

According to the present invention, there is provided a liquid-permeable top sheet which is brought into contact with a wearer, a liquid-impermeable back sheet, and a sheet interposed between the top sheet and the back sheet. In an absorbent article having a liquid-retaining absorbent portion, the absorbent portion includes an upper absorbent body and a lower absorbent body disposed on the non-skin contact surface side of the upper absorbent body, wherein the upper absorbent body The topsheet is formed independently of the lower absorbent body and disposed substantially in a non-contact state with the lower absorbent body, and is capable of changing its phase in the width direction or the longitudinal direction with respect to the lower absorbent body. The above object has been attained by providing an absorbent article characterized by being coated with an absorbent article.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the absorbent article according to the present invention will be specifically described with reference to the drawings. FIG.
FIG. 2 is a perspective view showing a sanitary napkin as a first embodiment of the absorbent article according to the present invention, and FIG. 2 is a cross-sectional view in the width direction of the sanitary napkin of FIG.

The sanitary napkin 10 of the present embodiment includes a liquid-permeable top sheet 11 that is in contact with a wearer, a liquid-impermeable back sheet 12, and a gap between the top sheet 11 and the back sheet 12. And a liquid-retaining absorbing portion 13 interposed therebetween. This configuration is the same as the conventional known technology.

Accordingly, the sanitary napkin 10 of the present embodiment is
Then, as shown in FIG. 1 or FIG.
An upper-layer absorber 13a, and a lower-layer absorber 13b disposed on the non-skin contact surface side of the upper-layer absorber 13a, wherein the upper-layer absorber 13a is formed independently of the lower-layer absorber 13b; The lower absorbent body 13b is disposed substantially in non-contact with the lower absorbent body 13b, and is covered with the top sheet 11 so as to be capable of changing the phase in the width direction or the longitudinal direction with respect to the lower absorbent body 13b.

More specifically, in the present embodiment, the upper absorbent body 13a is formed in two layers by stacking two absorbent sheets. The lower absorbent body 13b is formed in one layer by one absorbent sheet.

The top sheet 11 has a substantially central portion in contact with the upper absorbent body 13a, and further along the left and right side edges of the upper absorbent body 13a, the upper absorbent body 13a and the lower absorbent body 13b. Between the upper absorber 1
3a, widthwise central portion 13 on the side of lower absorbent body 13b
The surface except a 'is covered. This topsheet 11
Is folded back between the upper absorber 13a and the lower absorber 13b to form a continuous portion 11c. The upper absorber 13a and the lower absorber 13b are connected to each other by the continuous portion 11c.
Are arranged in a substantially non-contact state via the. Further, the topsheet 11 is moved from the continuous portion 11c to the side edges 11d, 11d.
The upper absorbent body 13 in the lower absorbent body 13b extends to d.
It is in contact with the surface on the side a, and covers the surface on the side of the upper absorbent body 13a except for the center 13b 'in the width direction on the side of the upper absorbent body 13a in the lower absorbent body 13b. The upper absorber 13
a "and the lower absorbent body 13b are" disposed substantially in a non-contact state "when the lower absorbent body 13a of the upper absorbent body 13a is
a non-contact state that does not hinder the phase change with respect to b. For example, when the central portion of the upper absorber 13a hangs down and partially contacts the lower absorber 13b, it is substantially in a non-contact state It is included while it is.

The lower absorbent body 13b is a back sheet 1
2, the top sheet 11 and the back sheet 12 are fixed around the lower absorbent body 13b. At the edge of the sanitary napkin 10, the topsheet 11 is fixed to the backsheet 12 in a folded state. In addition, the back sheet 12 is coated with an adhesive on its outer surface to form two adhesive portions 12a,
The adhesive portions 12a are covered with a release paper 16, and the release paper 16 is peeled off immediately before the sanitary napkin 10 is attached to expose the adhesive portions 12a, 12a to adhere to clothing. ing.

The width Wa of the upper absorber 13a is preferably 20 to 80%, more preferably 30 to 70% of the width Wb of the lower absorber 13b. 20
If it is less than 80%, the body fluid may be displaced from the leaked part of the wearer, and if it is more than 80%, the fitting property to the leaked part may be impaired. The length La of the upper absorber 13a is preferably 20 to 100% of the length Lb of the lower absorber 13b. If it is less than 20%, there is a risk that the body fluid will slip from the leaked part of the body fluid. Furthermore, the thickness Ta of the upper absorber 13a
Is preferably 0.3 to 10 mm, and 0.5 to 6 mm.
mm is more preferable. This is because the upper absorbent body 13a is securely brought into contact with the wearer without discomfort and exhibits a sufficient liquid absorbing capacity.

The upper absorber 13a and the lower absorber 13
As a material for forming b, fluff pulp, high-absorbency polymer, paper, non-woven fabric and the like can be used without any particular limitation. It is preferable to include at least an absorption sheet having a size of about 5 mm. If the thickness is less than 0.3 mm, it is easy to twist, and if it is more than 5 mm, the rigidity is too large, giving the wearer an uncomfortable feeling. In the first embodiment shown in FIG. 1, the upper absorbent body 13a is formed in two layers by stacking two absorbent sheets having a thickness of 0.3 to 5 mm, and the lower absorbent body 13b is formed to have a thickness of 0.3 mm. One absorbent sheet of 3 to 5 mm is formed in one layer.

The upper absorber 13a and the lower absorber 13
As the absorbent sheet forming b, a sheet such as absorbent paper, a nonwoven fabric, a pulp sheet in which fibers are formed into a sheet with a binder or the like, fluff pulp, and a sheet in which fibers are mixed with a highly absorbent polymer to form a sheet is used. It is preferable that the fibers are mixed with a superabsorbent polymer to form a sheet, from the viewpoint that the fibers can be processed and a good body fluid absorption can be obtained. In addition, as a sheet formed by mixing a superabsorbent polymer with a fiber, a sheet in which a superabsorbent polymer is dispersed between paper or nonwoven fabric, a mixture of a hydrophilic fiber, a superabsorbent polymer and a binder are used. Any of those formed in a sheet shape can be used. As the fibers or hydrophilic fibers, cellulose fibers such as wood pulp,
Regenerated cellulose fiber such as rayon and cupra, hydrophilic synthetic fiber such as polyvinyl alcohol fiber and polyacrylonitrile fiber, or polyethylene, polypropylene, polyethylene terephthalate, polyethylene / polypropylene composite fiber whose surface is made hydrophilic with a surfactant, etc., polyethylene / Polyethylene terephthalate composite fiber is preferred, and cellulose fiber is more preferred from the viewpoint of maintaining good hydrophilicity.

In the case where an absorbent sheet is formed by mixing a superabsorbent polymer, the superabsorbent polymer is preferably a polymer capable of absorbing and retaining a liquid 20 times or more its own weight and gelling. Specific examples include starch, crosslinked carboxymethylated cellulose, polyacrylic acid and its salts, and polyacrylate graft polymers. As the polyacrylate, a sodium salt is preferable, and maleic acid, itaconic acid, acrylamide, 2-acrylamide-2-
Copolymers obtained by copolymerizing comonomers such as methylpropanesulfonic acid, 2- (meth) acryloylethanesulfonic acid, 2-hydroxyethyl (meth) acrylate or styrenesulfonic acid within a range that does not reduce the performance of the superabsorbent polymer are also used. preferable. In particular, acrylic acid or alkali metal acrylates (sodium salt, potassium salt) or the like that absorbs and retains a large amount of liquid due to ion osmotic pressure and does not leak the absorbed liquid even under pressure is cross-linked. A superabsorbent polymer composed of water-insoluble hydrophilic cross-linked polymer particles that are made water-insoluble is preferred.

Further, in the case of forming an absorbent sheet by mixing a binder, it is preferable to use a hot-melt adhesive fiber and / or a paper strength agent as the binder from the viewpoint of wet strength. As the hot-melt adhesive fiber,
Fibers that are melted by heating and adhere to each other can be used.Specifically, for example, polyethylene, polypropylene and polyolefin fibers such as polyvinyl alcohol, polyester fibers, polyethylene-polypropylene composite fibers, polyethylene-polyester composite fibers, Examples thereof include low-melting polyester-polyester composite fibers, polyvinyl alcohol-polypropylene composite fibers having a hydrophilic fiber surface, and polyvinyl alcohol-polyester composite fibers. When using a conjugate fiber, any of a core-sheath type conjugate fiber and a side-by-side type conjugate fiber can be used. These heat fusible adhesive fibers can be used alone or in combination of two or more. Examples of the heat-meltable adhesive fibers preferably used in the present invention include polyvinyl alcohol fibers soluble in hot water, and core-sheath type polyester fibers. In general, these heat-meltable adhesive fibers preferably have a fiber length of 2 to 60 mm and a fiber diameter of 0.1 to 3 denier (particularly 0.5 to 0.5).
-3 denier).

Examples of the paper strength agent include polyamine / epichlorohydrin resin, dialdehyde starch, sponge, carboxymethyl cellulose and the like.

The preferred absorbent sheet is composed of a hydrophilic fiber and a hot-melt adhesive fiber or a paper reinforcing agent, and a highly absorbent polymer.
The absorbing sheet is not present on the absorbing surface that absorbs the liquid, but is dispersed and arranged inside the absorbing sheet, and is adhered and fixed to the hydrophilic fibers that constitute the absorbing sheet. Spray basis weight of polymer is 5 to 300 g /
m ² , and the thickness of the absorbent sheet is 0.3 to 1.5 m
m. Further, as the more preferable absorbent sheet, a fiber structure formed of bulky hydrophilic fiber and hot-melt adhesive fiber or paper reinforcing agent and superabsorbent polymer particles; The particles are not present on the absorbing surface where the absorbing sheet absorbs the liquid, but are dispersed and fixed in the fibrous structure, and the spray basis weight of the superabsorbent polymer is 20 to 70.
g / m ² , and the thickness of the absorbent sheet is 0.3-1.
A high-absorbency sheet having a size of 5 mm is exemplified.

In such a superabsorbent sheet, since the superabsorbent polymer is three-dimensionally dispersed and fixed in one sheet, the absorbing ability of the superabsorbent polymer is effectively exhibited, Further, since gel blocking of the polymer is small, the body fluid can be easily transmitted through the absorbent sheet, and high absorbency can be obtained.

The topsheet 11 is a sanitary napkin 1
The stress at 200% elongation in the width direction of 0 is 200 to 2
The weight is preferably 000 g, more preferably 500 to 2000 g, and even more preferably 800 to 2000 g. If the weight is less than 200 g, the phase change due to the operation is easily generated too easily, and the configuration distortion and the spread of the body fluid are easily generated. Above 2000 g, virtually no phase change occurs. In the topsheet 11, the permanent distortion in the width direction of the sanitary napkin 10 is preferably 70% or less, more preferably 50% or less. If the permanent distortion exceeds 70%, the resilience after the phase change is poor, and the configuration becomes permanent distortion, so that the phase cannot be repeatedly changed, and the fitting property is impaired.

The stress in the width direction means that the topsheet 11 is 150 mm in the width direction of the sanitary napkin 10.
This is the stress when the test piece was cut to 50 mm in the longitudinal direction, the end of the test piece in the long side direction was fixed to a Tensilon tensile tester at a distance between chucks of 100 mm, and the test piece was pulled at a speed of 300 mm / min to reach a distance between chucks of 200 mm. The permanent set in the width direction is defined as cutting the topsheet 11 into 150 mm in the width direction and 50 mm in the longitudinal direction of the sanitary napkin 10, and using a Tensilon tensile tester to measure the long-side end of the test piece in the distance between the chucks. Fixed at 100mm, speed 300mm /
And then the distance between the chucks is set to 200 mm at a similar speed (300 mm / min).
mm, the length in the width direction of the topsheet 11 was measured,
The ratio (%) of the length that cannot be relaxed (the length of the portion extended and longer than the initial length) to the initial length (distance between chucks = 100 mm) is obtained.

As the material for forming the topsheet 11, a nonwoven fabric such as polyethylene (PE), polypropylene, polyester, or PE / PET composite fiber, or a polyethylene perforated film formed by perforating a film such as polyethylene may be used. An apertured nonwoven fabric obtained by opening a nonwoven fabric made of a binder fiber in a three-dimensional manner, or an apertured film obtained by opening a film in a three-dimensional manner is preferable because it is easy to obtain elastic properties.

As the pressure-sensitive adhesive and release paper 16 forming the pressure-sensitive adhesive portions 12a, 12a, those conventionally used can be used without any particular limitation.

The sanitary napkin 10 of the present embodiment is mounted with the adhesive portions 12a, 12a fixed to the underwear by adhesive, and the upper absorbent body 13a in contact with the leakage portion of the wearer via the topsheet 11. . During the wearing, a gap occurs between the leaked part of the wearer and the sanitary napkin 10 due to an operation of the wearer. That is, the lower absorbent 1
When a force is applied to 3b in the width direction, the lower absorbent body 13b moves in the width direction. Then, the continuous portion 11c of the topsheet 11
Are deformed in accordance with the movement of the lower absorber 13b, and the phase of the upper absorber 13a in the width direction with respect to the lower absorber 13b is changed. As a result, the upper absorbent body 13a
Is kept unchanged. When the force in the width direction applied to the lower absorber 13b disappears, the continuous portion 11c is restored to the original shape by the stress generated in the continuous portion 11c, and the upper absorber 13a becomes the lower absorber 13b.
b is arranged at the center in the width direction.

Also, the upper absorbent body 1 can be operated by the wearer.
When a force in the width direction is applied to 3a, the upper absorber 13a is displaced in the width direction with respect to the lower absorber 13b. At this time, the upper absorbent body 13a is displaced while being in contact with the liquid leakage portion following the operation of the wearer, so that the liquid leakage is prevented well.
When the force in the width direction applied to the upper absorber 13a disappears, the stress generated in the continuous portion 11c causes the continuous portion 11
c is restored to the original shape, and the upper absorber 13a is arranged at the center in the width direction of the lower absorber 13b.

Thus, the sanitary napkin 1 of the present embodiment is
According to 0, since the upper absorbent body 13a is displaced in the width direction with respect to the lower absorbent body 13b in accordance with the action of the wearer, the upper absorbent body 13a is shifted in the width direction with respect to the liquid leakage part of the wearer. Therefore, the body fluid is reliably absorbed by the upper absorbent body 13a, and the liquid leakage is properly prevented. According to the sanitary napkin 10 of this embodiment, the upper absorbent body 13a and the lower absorbent body 1
3b is covered with the same topsheet 11,
When the wearer's operation or the like is completed, the upper absorbent body 13a is returned to the center in the width direction of the lower absorbent body 13b, so that the body fluid does not easily migrate to the right and left sides, and the liquid leakage is prevented well. According to the sanitary napkin 10 of the present embodiment, the upper absorbent body 13
a is formed narrower than the lower absorbent body 13b, and a large amount of bodily fluid is absorbed and retained at the center in the width direction of the absorbing portion 13, so that the bodily fluid hardly migrates to the left and right sides, and the liquid leakage is excellent. Is prevented.

According to the sanitary napkin 10 of this embodiment, the topsheet 11 covers the upper absorbent body 13a so as to freely change the phase in the vertical direction with respect to the lower absorbent body 13b. Even when a directional force acts, the state in which the upper absorbent body 13a is in contact with the liquid leaking part of the wearer is maintained, and the liquid leakage is favorably prevented. According to the sanitary napkin 10 of the present embodiment, the surface sheet 11 has a stress of 200% when the sanitary napkin 10 elongates 200% in the width direction.
Since it is 100 to 2000 g and the permanent set in the width direction of the sanitary napkin 10 is 70% or less, the lower absorbent body 13b is appropriately adjusted as the wearer moves.
Is appropriately changed, and when the wearer's operation is completed, the phase returns to its original state, so that the body fluid is absorbed without bias and leakage is more effectively avoided. According to the sanitary napkin 10 of the present embodiment, the upper absorbent body 13a of the absorbent portion 13
Is provided with an absorbent sheet, so that it is possible to provide an absorbent article that has high fitting properties, is hard to leak, and hard to twist.

FIG. 3 is a perspective view showing a sanitary napkin as a second embodiment of the absorbent article of the present invention, and FIG.
FIG. 3 is a longitudinal sectional view of the sanitary napkin of FIG. In this embodiment, the same members as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof will be omitted.

In the sanitary napkin 20 of the present embodiment, as shown in FIG. 3 or FIG. 4, the upper absorbent body 23a is formed independently of the lower absorbent body 23b and substantially not in contact with the lower absorbent body 23b. It is disposed in a state, and is covered with the top sheet 21 so that the phase can be freely changed in the longitudinal direction with respect to the lower absorbent body 23b. In addition, the upper absorbent body 23a is formed by folding one sheet into three pieces so that the bent part is arranged along the longitudinal direction and one side edge is inside and the other side edge is outside. Formed in three layers. Lower absorber 23
b is formed in two layers by laminating two strip-shaped sheets. The upper absorber 23a is covered with the topsheet 21 so as to be capable of changing the phase in the longitudinal direction with respect to the lower absorber 23b. The upper absorber 23a is formed into three layers by folding it in three. The lower absorber 23b is formed of two sheets. The other configuration is the same as that of the above-described first embodiment.

More specifically, the top sheet 21 has a substantially central portion in contact with the upper absorbent body 23a, and further extends along the front and rear edges of the upper absorbent body 23a. Folded between the lower absorber 23b and the lower absorber 23b in the upper absorber 23a.
The surface except for the central portion 23a '' in the longitudinal direction is covered. Further, the topsheet 21 is folded back between the upper absorber 23a and the lower absorber 23b to form the continuous portion 21c.
Is formed, and the upper absorbent body 23a and the lower absorbent body 23b are disposed in a substantially non-contact state via the connecting portion 21c. Further, the topsheet 21 is connected to the connecting portion 21c.
From the end 21d to the end 21d, the lower absorber 23b is in surface contact with the surface on the upper absorber 23a side, and the lower absorber 23b is on the upper absorber 23a side except for the longitudinal center portion 23b ″ on the upper absorber 23a side. The surface is covered.

The topsheet 21 is made of a sanitary napkin 2
0 when the stress at 200% elongation in the longitudinal direction is 200 to
Preferably, it is 2000 g. If less than 200g,
The phase change due to the operation is too easy to occur, which tends to cause structural distortion and spread of body fluid. Above 2000 g, virtually no phase change occurs. Further, the permanent distortion of the topsheet 21 in the longitudinal direction of the sanitary napkin 20 is preferably 70% or less. If the permanent distortion exceeds 70%, the resilience after the phase change is poor, and the configuration becomes permanent distortion, so that the phase cannot be repeatedly changed, and the fitting property is impaired.

The stress in the longitudinal direction is defined as that the topsheet 21 is moved 150 m in the longitudinal direction of the sanitary napkin 20.
m, cut to 50 mm in the width direction, fixed the end of the test piece in the long side direction to a Tensilon tensile tester at a distance of 100 mm between chucks, pulled at a speed of 300 mm / min, and stressed when the distance between chucks became 200 mm. is there. Further, the permanent set in the longitudinal direction means that the topsheet 21 is 150 mm in the longitudinal direction of the sanitary napkin 10 and 50 mm in the width direction.
And the end of the test piece in the long side direction was fixed to a Tensilon tensile tester at a distance between chucks of 100 mm, and the speed was 300 m.
After pulling at a speed of 200 m / min and setting the distance between the chucks to 200 mm, the length in the width direction of the top sheet 11 when the distance between the chucks was set to 100 mm at the same speed (300 mm / min) was measured. The ratio (%) of the non-relaxable length (the length of the portion extended and longer than the initial length) with respect to the distance = 100 mm) was obtained. Examples of the material forming the topsheet 21 include polyethylene (PE), polypropylene, polyester, and PE / PE.
Non-woven fabrics such as T-composite fiber, polyethylene perforated film formed by perforating a film such as polyethylene, etc. can be used. A perforated apertured film is preferable because it is easy to obtain elastic properties.

The sanitary napkin 20 of the present embodiment is mounted with the adhesive portions 12a, 12a fixed to the underwear by adhesive, and the upper absorbent body 23a in contact with the leakage portion of the wearer via the topsheet 21. . During the wearing, a displacement occurs between the leakage part of the wearer and the sanitary napkin 20 due to the operation of the wearer. That is, the lower absorbent 2
When a force is applied to 3b in the longitudinal direction, the lower absorbent body 23b moves in the longitudinal direction. Then, the continuous portion 2 of the topsheet 21
1c is deformed in accordance with the movement of the lower absorber 23b, and the longitudinal phase of the upper absorber 23a with respect to the lower absorber 23b changes. As a result, the state where the upper absorbent body 23a is in contact with the liquid leakage part of the wearer is maintained without change.
When the longitudinal force applied to the lower absorbent body 23b disappears, the stress generated in the connecting portion 21c causes the connecting portion 2
1c is restored to its original shape, and the upper absorber 23a is disposed at the longitudinal center of the lower absorber 23b.

Further, the upper absorber 2 may be operated by the wearer.
When a longitudinal force is applied to 3a, the upper absorber 23a is displaced in the longitudinal direction with respect to the lower absorber 23b. At this time, since the upper absorbent body 23a is displaced while following the movement of the wearer while being close to the liquid leakage portion, the liquid leakage is prevented well. When the longitudinal force applied to the upper absorber 23a is eliminated, the continuous portion 21c is restored to the original shape by the stress generated in the continuous portion 21c, and the upper absorber 23a is moved in the longitudinal direction of the lower absorber 23b. It is arranged in the center.

Thus, the sanitary napkin 2 of the present embodiment is
At 0, the upper absorbent body 23a is displaced in the longitudinal direction with respect to the lower absorbent body 23b in accordance with the wearer's operation or the like. Therefore,
According to the sanitary napkin 20 of the present embodiment, when a force is applied in the longitudinal direction of the sanitary napkin 20, the same effects as those of the first embodiment can be obtained. According to the sanitary napkin 20 of the present embodiment, since the upper absorbent body 23a of the absorbent section 13 is provided with the absorbent sheet, it is possible to provide an absorbent article that has a high fitting property, is hard to leak, and is hard to twist.

The present invention is not limited to the above-described embodiment, and specific shapes and dimensions of each member can be appropriately changed without departing from the spirit of the present invention.
For example, in each of the above embodiments, the upper absorber 13a,
23a and / or the lower absorbent body 13b, 23b may be formed by an absorbent pad instead of or together with the absorbent sheet. Further, the upper absorbers 13a, 23a
And the lower absorbers 13b and 23b are formed by folding one absorbent sheet or laminating a plurality of absorbent sheets to form two layers,
It can be formed into three or more layers or a single layer with one absorbent sheet. The lower absorbers 13b and 23b and the back sheet 12 may be formed into one sheet.

The top sheets 11 and 21 correspond to the upper absorbent body 13.
a, 23a may cover the lower absorbers 13b, 23b so as to be capable of changing the phase in the width direction or the longitudinal direction,
The folded form is not particularly limited. Further, the upper absorbers 13a and 23a are replaced with the lower absorbers 13b and 23b.
Can be coated so as to be capable of changing the phase in both the width direction and the longitudinal direction. As in the above embodiment, the topsheets 11 and 21 divide the upper absorbers 13a and 23a and the lower absorbers 13b and 23b into the widthwise central portions 13a 'and 13a.
It is preferable to cover except for the b ′ or the central portions 23a ″ and 23b ″ in the longitudinal direction.
a and the lower absorbers 13b and 23b are brought into contact with each other to form the entire upper absorbers 13a and 23a and the lower absorber 13a.
The entire surface on the side of the upper absorbers 13a and 23a can also be covered. The side edges of the back sheet 12 are extended as shown by dotted lines in FIG. 2 to form leak-proof walls 12 ′, 12 ′, or a liquid-impermeable leak-proof material is disposed outside the absorber 13. Thus, the liquid leakage may be more reliably prevented. The leak-proof walls 12 ′, 12 ′ and the leak-proof material can be interposed between the absorbing portion 13 and the top sheets 11, 21.
21 may be arranged outside.

In the above embodiment, the case of the sanitary napkin has been described. However, in the case of other absorbent articles such as disposable diapers, similarly, the phase of the lower absorbent body and the upper absorbent body can be freely changed to improve the fit. , Can prevent leakage.

[0040]

As described above, according to the absorbent article according to the first aspect of the present invention, the upper absorbent body can be connected to the body fluid leaking part of the wearer without being affected by the wearer's operation at the time of wearing. To maintain good fit and prevent liquid leakage.

According to the absorbent article according to the second aspect of the present invention, in addition to the effects of the first aspect, the upper absorber can freely change the phase in the vertical direction with respect to the lower absorber. Therefore, even if a force acting in the direction away from the wearer acts, the state in which the upper absorbent body is in contact with the liquid leaking part of the wearer is maintained, the fit is good, and the liquid leakage is further prevented. You.

According to the absorbent article according to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, in addition to the effect of the wearer, the lower absorbent body of the upper absorbent body appropriately. Is changed and restored, the fit is better and leakage is even better avoided.

According to the absorbent article according to the fourth aspect of the present invention, in addition to the effects of the first, second, or third aspect of the present invention, the upper absorbent body is higher than the lower absorbent body. Since the width is narrow, the absorbing portion can be formed with a larger liquid absorbing capacity at the center in the width direction than in the related art, and the liquid leakage at the side edge portion can be more effectively prevented.

According to the absorbent article according to the fifth aspect of the present invention, in addition to the effects of the first, second, third, or fourth aspect of the present invention, an upper layer absorbing part of the absorbing part is provided. Since the body has an absorbent sheet, it has a high fit,
An absorbent article that is hard to leak and hard to twist can be provided.

According to the absorbent article according to the sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, in addition to the effect of the fifth aspect, the upper absorbent body of the absorbing section is provided with an absorbent sheet containing a highly absorbent polymer. Therefore, the workability is good and the body fluid absorption is large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of an absorbent article according to the present invention.

FIG. 2 is a cross-sectional view in the width direction of the sanitary napkin of FIG.

FIG. 3 is a perspective view showing a sanitary napkin as a second embodiment of the absorbent article according to the present invention.

FIG. 4 is a longitudinal sectional view of the sanitary napkin of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sanitary napkin 11 Top sheet 11c Connecting part 11d Side edge 12 Back sheet 12 'Leak-proof wall 12a Adhesive part 13 Absorbing part 13a Upper absorbent body 13a' Width central part 13b Lower absorbent body 13b 'Width central part 16 Release paper 20 Sanitary napkin 21 Top sheet 21c Continuous portion 21d End 23a Upper absorber 23a "Center in longitudinal direction 23b Lower absorber 23b" Center in longitudinal direction

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Misato Hamajima 2606 Kabane-cho Akabane, Haga-gun, Tochigi Pref. In the Kao Corporation Research Institute

Claims (6)

[Claims] 1. A liquid-permeable top sheet to be brought into contact with a wearer, a liquid-impermeable back sheet, and a liquid-retentive absorbing portion interposed between the top sheet and the back sheet. In the absorbent article, the absorbing section includes an upper absorbent body and a lower absorbent body disposed on the non-skin contact surface side of the upper absorbent body, and the upper absorbent body is independent of the lower absorbent body. And is arranged in a substantially non-contact state with the lower absorbent body, and is covered with the top sheet so that the phase of the lower absorbent body can be changed in the width direction or the longitudinal direction. Absorbent article. 2. The surface of the upper absorbent body excluding the central part in the width direction or the longitudinal central part of the lower absorbent body side, and the surface of the lower absorbent body excluding the central part in the width direction or the longitudinal central part of the upper absorbent body side. 2. The absorbent article according to claim 1, wherein the surface on the side of the upper absorbent body is covered with the topsheet, and the topsheet is formed of one continuous sheet. 3. The surface sheet according to claim 1, wherein a stress at 200% elongation in the width direction of the absorbent article is 200 to 2000 g, and a permanent set in the width direction is 70% or less. The absorbent article according to claim 2. 4. The absorbent article according to claim 1, wherein the width of the upper absorber is 20 to 80% of the width of the lower absorber. 5. The absorbent article according to claim 1, wherein the upper absorbent body includes an absorbent sheet. 6. The above-mentioned absorbent sheet is a sheet in which a highly absorbent polymer is interposed between paper or nonwoven fabric in a layered manner, or
The absorbent article according to claim 5, wherein the absorbent article is formed by mixing a hydrophilic fiber, a superabsorbent polymer, and a binder to form a sheet.