JP2003052748A - Body fluid absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable efficient shrinkage by sufficiently supplying a body fluid to a shrinking material. SOLUTION: In this absorbent article, an absorber 25 composed of a shrinking material 27 to be shrunk by itself when touching a urine passed through a liquid permeable surface layer provided on the side facing the skin of a body and a body fluid absorbent material 26 composed of a carrier 26B practically integrated to this shrinking material 27 and a highly absorbent polymer 26A held by this carrier is located higher than a leak-proofing layer provided on the side away from the skin of the body and a liquid holding member LK is provided in contact with the shrinking material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body fluid absorbent article such as a disposable paper diaper and a sanitary napkin for absorbing body fluid.

[0002]

2. Description of the Related Art Basically, this type of body fluid absorbent article is
It has a liquid-permeable surface layer provided on the side of the body facing the skin, a leak-proof layer provided on the side away from the skin of the body, and a body fluid-absorbing portion provided between the two.

In this case, various constitutions of the body fluid absorbing portion are known, but as the absorbing material,
Mainly absorbent paper such as super absorbent polymer, cotton pulp (fluff pulp) and crepe paper. With the recent development of superabsorbent polymer technology, it has become possible to form a thinner body fluid absorbent portion, and therefore the fit of the absorbent portion of the product to the body is improved, and leakage is becoming less.

The improvement in the absorption characteristics of this product is demanded by consumers for the development of a new product which has a large absorption capacity while being thin and can be worn for a long time.

However, in order to meet this requirement, for example, in the case of urine, the bodily fluid-absorbing portion must absorb all of the urine output of a large number of times. However, the absorption rate of the body fluid-absorbing portion becomes slower each time urination is repeated, and in particular, the body fluid is often not absorbed up to the longitudinal end portion of the body fluid-absorbing portion. It is believed that this is due to insufficient diffusion of body fluid in the longitudinal direction (longitudinal direction of the product) and so-called gel blocking phenomenon in which expansion wetting due to swelling of the superabsorbent polymer is impeded.

As a method for solving these phenomena, Japanese Patent Laid-Open Nos. 2000-510031 and 2000-510.
Techniques for assisting wetting and spreading in the vertical direction such as No. 033, No. 2000-510031, No. 2000-5100
A technique for preventing gel blocking of a superabsorbent polymer such as No. 33, a device for the shape and incorporation of the superabsorbent polymer, and a method for securing a space that swells by wetting have been proposed.

[0007]

However, whichever method is used, it is not a sufficient solution. Examining this cause again, the body fluid absorbent part of the conventional body fluid absorbent article is arranged vertically and arranged along the longitudinal direction of the product, and the body fluid discharge part is designed so as to be located substantially at the center of the body fluid absorbent part,
It was premised that the body fluid from the drainage site would spread (diffuse) to the end in the longitudinal direction. Therefore,
Essentially, the entire body fluid absorbent portion cannot absorb the body fluid unless longitudinal diffusion of the body fluid is sufficient.

Therefore, the main problem of the present invention is that the body fluid absorbing portion is made to be small by utilizing a contractile material which contracts upon contact with body fluid, considering that there is a limit to the diffusion of body fluid in the body fluid absorbing portion. A body fluid absorbent article that effectively uses the entire absorbent material by being configured to change its position, and has a large overall absorption capacity while being thin as a whole, and that can withstand wearing for a long time To do.

Another object is to make the absorbing portion of the body fluid discharging portion be renewed as the body fluid is discharged. Another object of the present invention is to provide a body fluid absorbent article in which the function of the superabsorbent polymer is fully exerted without the so-called gel blocking phenomenon in which expansion wetting due to swelling of the superabsorbent polymer is obstructed.

[0010]

The present invention which has solved the above-mentioned problems is as follows. <Invention of Claim 1> A liquid-permeable surface layer provided on the side of the body facing the skin, a leak-proof layer provided on the side away from the skin of the body, and body fluid absorption provided therebetween. Absorbent article having a flexible portion, the shrinkable material having a predetermined length to shrink when contacted with body fluid, a carrier substantially integrated with the shrinkable material, and a high absorption retained by the carrier Holding member in which an absorbent material composed of a body fluid absorbent material made of a water-soluble polymer is disposed in the body fluid absorbent portion such that the shrink material is contractible, and is in contact with the shrinkable material of the absorbent material A body fluid absorbent article, comprising:

(Advantageous Effects) An absorbent material comprising a shrinkable material having a predetermined length which shrinks upon contact with a body fluid and a body fluid absorbent material substantially integrated with the shrinkable material is a body fluid. Since the shrinkable material is disposed in the absorbent portion so as to be able to shrink, when the shrinkable material comes into contact with the body fluid, the shrinkable material shrinks, and along with this, the substantially integrated body fluid absorbent material also shrinks.
As a result, the part that the body fluid absorbent absorbs first escapes with respect to the body fluid discharge site, and instead, a new part of the body fluid absorbent material is located, that is, at the body fluid discharge site. On the other hand, the absorbent portion of the body fluid absorbent material is renewed and changes its position as the body fluid is discharged. Therefore, it is possible to effectively use the entire absorbent material, and as a whole, it is possible to obtain a body fluid absorbent article which has a thin body fluid absorbent portion, has a large absorption capacity, and can withstand wearing for a long time. .

The body fluid absorbent material comprises a superabsorbent polymer and a carrier for the superabsorbent polymer. Therefore, when the body fluid absorbent material contracts due to the contraction of the contractile material due to contact with body fluid, the superabsorbent polymer absorbent portion of the body fluid absorbent material accompanies body fluid discharge with respect to the body fluid discharge site. Therefore, there is no so-called gel blocking phenomenon in which expansion wetting due to swelling of the superabsorbent polymer is obstructed, and the function of the superabsorbent polymer is fully exhibited.

On the other hand, according to the present invention, the shrinkable material constituting the absorbent material absorbs body fluid and shrinks. However, if a sufficient amount of body fluid is not supplied to the shrinkable material, the shrinkable material Shrinkage is also insufficient and efficient shrinkage cannot be expected. However, since a superabsorbent polymer exists near the shrinkable material, when absorbing the body fluid, the fluid absorbs between the shrinkable material and the superabsorbent polymer and the shrinkable material is sufficiently If the superabsorbent polymer completely absorbed the body fluid before absorbing the body fluid, the shrinkable material could no longer shrink, and the above-described renewal of the body fluid absorbent material might be incomplete. Further, most of the current shrinkable materials have a slower body fluid absorption rate than the superabsorbent polymer, and it has been found that such incomplete renewal often occurs.

Therefore, in the present invention, a liquid retaining member that comes into contact with the shrinkable material is further provided. The body fluid is retained by the liquid retaining member, and the body fluid sufficient for the contraction is supplied to the contractible material.

<Invention of Claim 2> The liquid retaining member comprises:
The body fluid absorbent article according to claim 1, which is formed from at least one of a tissue paper and a non-woven fabric.

(Function and Effect) As the liquid retaining member, thin paper or non-woven fabric is suitable from the viewpoint of liquid retaining property and cost, and by disposing them so as to contact with the shrinkable material,
The same effects as those of the described invention can be obtained.

<Invention of Claim 3> The absorbent material is fixed to the body fluid absorbent portion at one end, and the liquid retaining member is provided only on the fixed end portion side of the absorbent material. The body fluid absorbent article according to claim 1.

(Function and Effect) In the form in which the absorbent material is fixed to the body fluid absorbent portion at one end, the contractible material constituting the absorbent material is fixed to the absorbent material and the body fluid absorbent portion as the body fluid is absorbed. Contracts to the side. On the other hand, the shrinkable material gradually shrinks while absorbing body fluid. Therefore, by making the liquid retaining member unevenly distributed on the fixed end side (for example, provided only in the portion from the fixed end to the position corresponding to the bodily fluid discharge organ), the contractile material moves due to contraction, but at the destination thereof. Since the liquid retaining member is always present and the body fluid can be continuously supplied to the shrinkable material, the shrinkable material can be sufficiently shrunk. Further, the other end side portion of the shrinkable material corresponding to the portion not provided with the liquid retaining member is pulled by the contraction of the fixed end side portion of the shrinkable material and moves to the portion corresponding to the liquid retaining member, It can be contracted while receiving body fluid replenishment by the liquid retaining member at the time of later absorbing body fluid. Further, with such a configuration, the length of the liquid retaining member can be suppressed to the necessary minimum, and the cost can be reduced.

<Invention of Claim 4> The contractible material is sandwiched between the liquid retaining member and the carrier.
The body fluid absorbent article according to any one of claims 1 to 3.

(Function and Effect) With such an arrangement, the body fluid can be sufficiently retained in the liquid retaining member itself and between the liquid retaining member and the carrier so that the shrinkable material can be sufficiently contracted. Become. Other arrangements may result in incomplete shrinkage.

<Invention of Claim 5> The liquid retaining member comprises:
It is configured so that it does not protrude from the side end of the carrier and at least substantially covers the entire width direction of the shrinkable material,
The body fluid absorbent article according to any one of claims 1 to 4.

(Function and Effect) With such an arrangement, the liquid retaining member has a size necessary and sufficient for shrinking the shrinkable material, and the member cost can be suppressed.

<Invention of Claim 6> The absorption material is disposed on the leakproof layer through a liquid retaining member.
7. The body fluid absorbent article according to any one of 1. The body fluid absorbent article described.

(Advantageous Effects) In the form in which the absorbent material is in direct contact with the leak preventive layer, friction between the absorbent material and the leak preventive layer causes a frictional force which inhibits the shrinkage of the absorbent material due to the sticking of the absorbent material and the leak preventive layer when wet. By disposing the liquid retaining member between the absorbent and the leak preventive layer as described in claim 6, the liquid retainer reduces friction between the absorbent and the leak preventive layer when wet, and further contracts. Easier to do.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. As described above, the present invention is generally applied to body fluid absorbent articles such as disposable paper diapers and sanitary napkins, but when the diaper is used (when worn), the back left and right sides are brought to the abdomen left and right sides. An application example of a so-called tape type paper diaper of a type in which these are joined by a tape fastener (including an adhesive tape fastener and a surface fastener) will be described as an embodiment of a pants-type disposable diaper or a pad-type disposable absorbent article. The embodiment with a sanitary napkin can be immediately conjectured, so the description of the latter two examples will be omitted.

(Example of Basic Form of Absorbent Article) As shown in FIGS. 1 and 2, the disposable diaper according to this embodiment has a liquid-permeable nonwoven fabric provided on the side of the body facing the skin, Alternatively, a leak preventer is formed of a perforated film or the like, which is a rectangular surface sheet 2 that comes into direct contact with the wearer's skin, or a rectangular impermeable back sheet made of a polyethylene plastic film or the like provided on the side away from the skin of the body. Layer 3 and body fluid absorber 2 provided between the layers
It has a body fluid absorbent portion 1 consisting of 0s only.

Further, a flexible outer sheet 4 is provided on the back side of the product, which is the back side of the leakproof layer 3, and the outer sheet 4 is a single nonwoven fabric or a plurality of breathable / water repellent nonwoven fabrics. It is made up by fixing the layers.

On both sides of the product, leg upright cuffs C, C projecting to the use surface side are respectively formed, and the upright cuffs C and an upright sheet 8 substantially continuous in the width direction,
For example, it is composed of one or a plurality of elastic members 9 made of rubber thread. More specifically, the standing cuffs C are formed by stacking the standing sheets 8 and wrapping the elastic member 9 and being fixed by a hot melt adhesive or the like. The standing sheet 8 forming each standing cuff C, C is preferably liquid-impermeable or hydrophobic, not liquid-permeable. In addition, it is desirable that it has ventilation or vapor permeability. A liquid-impermeable film sheet can be sandwiched between the upright sheets 8 to further improve the leakproofness.

The inner surface of the double standing sheet 8 is fixed to the surface sheet 2 and the outer sheet 4 with a hot melt adhesive or the like. As a result, this fixing start end of the double standing sheet 8 forms the rising end of the standing cuff C. The tip side from the standing end is a free portion that is not fixed to the product body.

On the other hand, the front and rear ends in the longitudinal direction of the double standing sheet 8 are attached to the article, specifically, the topsheet 2, by a hot melt adhesive or the like, with the free portion of the tip facing the center of the article. It is fixed on the outer surface. The space surrounded by the left and right standing cuffs C, C forms a confining space for urine or loose feces. When urine is excreted in this space, the urine passes through the liquid-permeable surface sheet 2 and is absorbed into the body fluid-absorbing portion 1, and the solid cuffs of the loose stool become a barrier, and the urine cannot be overcome. To be prevented.

On the other hand, at the longitudinal ends of the front body and the back body, a space is provided between the nonwoven fabrics of the outer shape sheet 4 in the waist portion in parallel with the edge of the waist opening in order to enhance the fit around the waist. The waist elastic members 10, 10 ... Made of thin rubber thread are arranged, and are stretched and fixed by a hot melt adhesive or the like so as to expand and contract. The interval and the number of the waist elastic members 10, 10 ... Can be appropriately determined, but for example, the interval is preferably about 4 to 8 mm, and the number is preferably about 3 to 10. Reference numeral 11 is a tape fastener for bringing the left and right side portions of the back side into the right and left side portions of the abdomen and joining them.

(Body fluid absorbent portion) The body fluid absorbent portion of the present invention is provided with a fluid permeable surface layer provided on the side of the body facing the skin and a side away from the body skin. It is a part between the leak-proof layer and the body fluid that has passed through the surface layer and absorbs it. Therefore, the structure of the body fluid absorbent portion can have various forms and shapes under the condition that the absorbent material of the present invention described below is provided.

<First Embodiment of Body Fluid Absorbing Part> FIG.
As shown in FIG. 4 and FIG. 4, the bodily fluid absorbent portion 1 according to the first embodiment is composed of only the bodily fluid absorber 20. Having a water-permeable or liquid-impermeable back-side sheet 22, the use-side sheet 21 and the back-side sheet 22 have fixing portions 23 along the longitudinal direction at positions spaced in the width direction of the product, and adjacent to each other. The space between the fixed portions 23, 23 is a channel space 24 along the longitudinal direction, and the absorbent material 25 of the present invention is provided in each of the channel spaces 24, 24 ...

As shown in FIG. 5, the absorbent material 25 includes a body fluid absorbent material 26 composed of a superabsorbent polymer 26A and a carrier 26B of the superabsorbent polymer 26A, and a shrinkable material 27.
And the body fluid absorbent material 26 with respect to the shrinkable material 27.
And are substantially integrated. In the illustrated example, the superabsorbent polymer 26A is intermittently arranged in the contraction direction with respect to the carrier 26B, and the portion X having the superabsorbent polymer 26A and the part Y not having the superabsorbent polymer 26A are alternately repeated in the contraction direction of the carrier 26B. Has become. Of course, in the present invention, the superabsorbent polymer may be continuously arranged in the shrinking direction (not shown).

The carrier 26B is made of a ribbon-shaped non-woven fabric or the like, and the superabsorbent polymer 26A is adhered or adhered thereto. Adhesion or adhesion of the superabsorbent polymer 26A to the carrier 26B can be carried out by a known fixing method of the superabsorbent polymer such as adhering by adding a small amount of water or adhering with an adhesive. The amount of the super-absorbent polymer 26A provided on the carrier 26B is determined by setting the amount of absorption of the absorbent article. In the light use and the heavy use, the carrier 26B is used.
It is desirable to change the shape of. The examples of FIGS. 3 to 5 are suitable for light use, but in the case of heavy use, a bag-like ribbon is used as a carrier, and the superabsorbent polymer 26A is confined therein, as will be described later. Can be taken.

The shrinkable material 27 and the body fluid absorbent material 26 are
Fixing with an adhesive 28 or the like intermittently in the longitudinal direction,
As shown in an example described later, it is substantially integrated in a form such as mechanically entangled by sewing with a sewing machine.

As the superabsorbent polymer, those which are used in this type of disposable absorbent article and can absorb and retain body fluid of, for example, 20 times or more of its own weight can be used. Examples of this include starch-based, cellulose-based and synthetic polymer-based ones. Starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, crosslinked sodium carboxymethyl cellulose and acrylic acid. (Salt) polymer etc. can be mentioned.
It is desirable that the superabsorbent polymer absorbs 10 times or more and swells in 10 seconds. Further, it is desirable that the surface is partially modified so as to be easily adapted to the adhesive. If the adhesive has tackiness, it is advantageous in processing but is not particularly limited. The adhesion between the super-absorbent polymer 26A and the carrier 26B may be maintained for at least several minutes after being swollen by water absorption, but may be continued for more than that.

To obtain the body fluid absorbent material 26, the superabsorbent polymer 26A is adhered and fixed to the material sheet of the carrier 26B with an adhesive, and then cut into a predetermined width and length, for example, a ribbon shape. It can be formed into.

The shrinkable material 27 is a material that contracts when it comes into contact with body fluid, and is disclosed in, for example, Japanese Examined Patent Publication No. 6-102068.
It can be manufactured by the technique disclosed in Japanese Patent No. 2656245. As a commercially available product, the product name “Solvlon” manufactured by Nichibi Co., Ltd. can be used. As the shrinkable material 27, a thread-shaped material having a circular or square cross section, a sheet-shaped material, a film-shaped material, or a net-shaped material can be used.

A plurality of shrinkable materials 27 may be arranged side by side with one body fluid absorbent material 26, for example, at intervals in the width direction. Further, a plurality of shrinkable materials 27 that are bonded to each other at positions spaced in the longitudinal direction may be fixed to the body fluid absorbent material 26. Further, a plurality of strands may be twisted and used for adjusting the shrinkage ratio.

After obtaining the body fluid absorbent material 26 in which the superabsorbent polymer 26A is adhered to the carrier 26B, it is joined with the shrinkable material 27, and after the carrier 26B and the shrinkable material 27 are joined, the high absorbency is obtained. The polymer 26A can also be adhered to the carrier 26B. In addition, the superabsorbent polymer 26A is the carrier 2
In addition to adhering to 6B, without using the carrier 26B,
The shrinkable material 27 can be adhered only to serve as an absorbent material. Therefore, in this latter case, the superabsorbent polymer 26A itself functions as the body fluid absorbent 26. Further, the superabsorbent polymer 26A can be adhered to both the carrier 26B and the shrinkable material 27.

By disposing the body fluid absorber 20 in the body fluid absorbent portion 1, drainage, for example, urine passes through the surface sheet 2 and contacts the carrier 26B through the use surface side sheet 21, and along the carrier 26B. When the urine comes in contact with the contractible material 27, the urine itself contracts, and the body fluid absorbent material 26 that is substantially integrated also contracts accordingly. As a result, the part absorbed by the body fluid absorbent material 26 first escapes with respect to the body fluid discharge area, and a new part of the body fluid absorbent material 26 comes to be located instead of this, that is, the body fluid discharge area. The position of the absorbent part of the body fluid absorbent material 26 is changed so as to be renewed as body fluid is discharged.
Therefore, the whole absorbent material 25 can be effectively used, and when viewed as a whole, a body fluid absorbent article that has a thin body fluid absorption capacity, a large absorption capacity, and can withstand wearing for a long time can be obtained. it can.

When the body fluid absorbent material 26 contracts as the contractile material 27 contracts due to contact with body fluid, the body fluid absorbent material 26 is absorbed by the superabsorbent polymer 26A at the body fluid discharge site. Since the part is renewed, there is no so-called gel blocking phenomenon that prevents expansion wetting due to swelling of the superabsorbent polymer 26A,
The functions of will be fully demonstrated.

Further, as shown in the illustrated example, the super absorbent polymer 2
When 6A is intermittently arranged in the contraction direction with respect to the carrier 26B, when the superabsorbent polymer 26A absorbs the body fluid and swells, the contraction of the body fluid absorbent material 26 at the site X is hindered. The site Y where the absorbent polymer 26A is not arranged can be easily contracted without such inhibition, and the absorbent material 25 as a whole can be efficiently contracted.

Further, as in the illustrated example, the channel space 2
When the absorbent material 25 is provided inside 4, the absorbent material 25 shrinks smoothly with the shrinkable material 27. Further, the body fluid can move and diffuse in the channel space 24 along the longitudinal direction thereof. In addition, when the product is attached, the channel space 24 serves as a cushioning portion or a cushioning portion, so that the contact with the skin is improved.

In this example, the liquid retaining member L is brought into contact with the shrinkable material 27 of the absorbent material 25 according to the present invention.
K is provided, and the body fluid is held by the liquid retaining member LK, and the body fluid sufficient for contraction is supplied to the contractible material. As long as the liquid retaining member LK makes contact with the contractible material 27 and exerts its function, the carrier 26B and the contractible material 27
The sheet may be fixed to the back side sheet, may be fixed to the back side sheet, or may not be fixed at all.

The liquid retaining member of the present invention may be any weakly hydrophilic sheet capable of retaining water, and thin paper or non-woven fabric is preferable in terms of liquid retaining property and cost. More specifically,
Hydrophilized non-woven fabrics having a basis weight of about 10 to ²⁰ g / m ² (spunbond non-woven fabrics, non-woven fabrics having a bonded card web, meltblown non-woven fabrics, and other known non-woven fabrics) and basis weights of 10 to ²⁰ g / m ² Paper having body fluid absorbency, such as thin paper (tissue paper), can be suitably used. By arranging these so as to contact the shrinkable material, it is possible to efficiently shrink the shrinkable material 27 as described above.

In particular, as in the illustrated example, the liquid retaining member LK is provided between the absorbent 25 and the liquid impermeable backside sheet 22 (leak preventive layer).
By disposing, the liquid retaining member reduces friction between the absorbent material and the leak preventive layer when wet, which brings an advantage that the liquid retaining member easily contracts.

As long as the liquid retaining member LK of the present invention is in contact with the shrinkable material 27, the shape, size and arrangement with respect to the shrinkable material can be appropriately determined, but as shown in the figure, the liquid retaining member LK.
If the contractile material 27 is sandwiched between the carrier 26B and the carrier 26B, the body fluid is sufficiently retained between the liquid retaining member LK itself and the liquid retainer member LK and the carrier 26B, and the body fluid is supplied to the contractible material 27. It is preferable because it is sufficient. However, in the present invention, a liquid retaining member is arranged between the shrinkable material 27 and the carrier 26B, the shrinkable material 27 is wrapped with a liquid retaining member, or the shrinkable material 27 is sandwiched between a pair of liquid retaining members. It is also possible (not shown).

Further, when the liquid retaining member LK is configured to have a width that does not protrude from the side end of the carrier 26B and at least substantially covers the entire width direction of the shrinkable material 27, the liquid retaining member is formed. The size is necessary and sufficient to shrink the shrinkable material, and the member cost can be suppressed.

<Second Embodiment of Body Fluid Absorbing Part> The cross-sectional shape of the channel space 24, the number thereof, and the like can be appropriately selected. It is also possible to arrange a plurality of absorbers 25 side by side in one channel space 24 (not shown).

The important physical properties of the shrinkable material 27 are shrinkage force and water absorption shrinkage. Absorbing material 25 in the channel space 24
In consideration of the fact that the contraction force decreases due to the friction between the absorbent portion of the absorbent material 25 and the inner wall of the channel when it moves, it is determined in consideration of the cross-sectional area of the channel space 24 and the swelling degree of the superabsorbent polymer 26A. Is desirable. Shrinkable material 27
If the shrinkage ratio of the original yarn is 30% or more, preferably 70% or more, the superabsorbent polymer 26A can be sufficiently moved after absorption.

The cross-sectional area S of the channel space 24 is the absorption material 2
5 is different, and the area calculated by the following formula is preferable.
Good a = amount of superabsorbent polymer per cm of absorbent material
Gram number, b = shrinkage rate of absorbent material (length after shrinkage / before shrinkage)
Length), S = cross-sectional area (cm ²) As: S = (30 to 200) × a / b ... (1) As shown in FIG. 6, the body fluid absorber 20 has two layers if necessary.
It is also possible to stack the above. In this case, the upper and lower layers are in position
It is desirable to shift by a half pitch.

The material of the use surface side sheet 21 for forming the channel space 24 is not limited as long as it is liquid permeable, and may be, for example, a nonwoven fabric or a perforated film. In this case, it is desirable to have voids that do not allow the superabsorbent polymer 26A to pass through. The back side sheet 22 to be joined to the use side sheet 21 can be selected from a non-woven fabric, a leakproof sheet, a moisture resistant paper, an absorbent paper and the like.

<Third and Fourth Embodiments of Body Fluid Absorbent Section> As the body fluid absorbent section, as shown in FIG. 7, a filamentous carrier 26B1 to which a superabsorbent polymer 26A is adhered and a shrinkable material are provided. It is also possible to adopt a mode in which the absorbent material 25, which is joined by sewn with 27 with a sewing machine, is used. If necessary,
The filamentous carrier 26B1 and the shrinkable material 27 can also be knitted.

As shown in FIG. 8, the superabsorbent polymer 26
It is also possible to bond the thread-shaped carrier 26B to which A is adhered and the shrinkable material 27 with the adhesive 28.

<Fifth and Sixth Embodiments of Body Fluid Absorbing Part> On the other hand, when the superabsorbent polymer is intermittently arranged, the superabsorbent polymer 26A is formed on the outer surface of the ribbon-shaped nonwoven fabric carrier 26B as in the above example. In the configuration of arranging
In consideration of the retention of the above, it is unavoidable that the amount of the superabsorbent polymer 26A disposed as a whole becomes small and the absorption capacity is lowered, so that it is not suitable for heavy use.

Therefore, particularly suitable modes for intermittently disposing the superabsorbent polymer are the fifth and sixth embodiments described below.

That is, the fifth embodiment is shown in FIGS.
As shown in FIG. 2, the above-mentioned form including the channel space 24 is a form in which the superabsorbent polymer carrier 26B extends in the contraction direction and has a bag shape, and the superabsorbent polymer 26A is enclosed therein.

The width of the bag-shaped carrier 26B is preferably about 1 cm. In addition, the super absorbent polymer 2 for the bag-shaped carrier 26B
The arrangement amount of 6A can be appropriately set according to the desired absorption capacity, and it is possible to fill the inside of the bag to the full, but in that case, the polymer swollen early in the filling portion causes the remaining unswelled polymer to since the local gel blocking fluid supply is inhibited is generated, as 5 cm ² to 20 cm ² per 0.01~0.1g bag-shaped carrier,
It is preferable to form voids in the bag so that the superabsorbent polymer 26A can swell in response to the swelling.

In a particularly preferred form, as shown in the drawing, the bag-shaped carrier 26B is provided inside with a large number of compartments r1 and r in the contracting direction.
2 are formed, and the super absorbent polymer 26A is enclosed in every other compartment r1, r2 ... Enclosed compartments r1 in which the polymer 26A is encapsulated and non-encapsulated compartments r2 in which the superabsorbent polymer 26A is not encapsulated are alternately formed in the contraction direction. These compartments r1, r2 ...
The length is preferably about 2 to 10 cm. Such a bag 26
As the method for forming the compartment of B, for example, a pair of liquid-permeable sheets st, st are stacked, and predetermined portions such as the peripheral portion of the bag body and the peripheral portion of the compartment are adhered by hot melt adhesive, ultrasonic welding or heat. A method of joining by sealing or a method of folding the center in the width direction of one sheet and joining corresponding end portions to each other is conceivable, but the latter method is preferable because it has a small number of joining portions and is practical.

The liquid-permeable sheet used for the bag-shaped carrier 26B has a basis weight of 15 to 20 g / m including thermoplastic synthetic fibers, especially considering that the edges are heat-sealed.
Approximately ² liquid-permeable hydrophilic non-woven fabrics (known spun-bonded non-woven fabrics, non-woven fabrics bonded with card webs, melt blown non-woven fabrics, hybrid non-woven fabrics thereof, etc.) and synthetic pulp (Mitsui Petrochemical SWP etc.) Amount 15-20g
A tissue paper of about / m ² can be preferably used. In particular, it is preferable to use a material that retains water to such an extent that the shrinkable material 27 provided along with it can be efficiently wetted. Further, this sheet is integrated with the shrinkable material 27, and when the shrinkable material 27 shrinks, a force of about 2 to 5 N is applied to the joint portion with the shrinkable material 27, so that it can withstand it. It is desirable to have wet strength.

The superabsorbent polymer 26A is a bag-like carrier 26.
It is preferable to enclose it so as to be movable in B in order to prevent gel blocking, but if the encapsulation amount is small, it may be unevenly distributed in the carrier 26B. Alternatively, it can be adhered. This adhesion or adhesion can be performed by a known method for fixing a superabsorbent polymer, such as adhesion by adding a small amount of water, or adhesion with an adhesive.

By thus forming the superabsorbent polymer carrier 26B in the shape of a bag and disposing the superabsorbent polymer 26A inside, the polymer 26A does not fall off from the carrier at the time of contraction, etc. It becomes possible to hold many polymers 26A. Further, as shown, the polymer-enclosed compartment r1 and the non-encapsulated compartment r1.
If 2 and 2 are alternately formed in the contraction direction, the intermittent arrangement of the superabsorbent polymer 26A can be more reliably maintained, the absorption capacity can be sufficiently ensured, and as shown in FIG. It is possible to easily shrink the portion Y where is not arranged together with the shrinkable material 27.

Further, in the form in which the carrier 26B is formed into a bag shape and the superabsorbent polymer 26A is intermittently arranged therein as described above, the superabsorbent polymer 26A is reliably held in the carrier 26B. As shown, the use surface side sheet 21 and the back surface side sheet 22 in the above-described embodiment can be omitted (sixth embodiment). In this case, the topsheet 2 may be omitted (not shown).

<Seventh Embodiment of Body Fluid Absorbing Part> FIG.
In the form in which the superabsorbent polymer is intermittently arranged as shown in FIG. 4C, etc., if the length in the contraction direction of the portion Y where the superabsorbent polymer 26A is not arranged is too long with respect to the polymer arrangement portion X, the contraction efficiency is improved. Since the polymer arrangement area is reduced, the absorption capacity is reduced. On the contrary, the superabsorbent polymer 26
When the length in the shrinking direction of the portion Y in which A is not arranged is shorter than that in the polymer-arranged portion X, the absorbing capacity is improved, but the shrinking efficiency is lowered. Therefore, desirably, the portion Y of the carrier 26B where the superabsorbent polymer 26A is not arranged
The length in the shrinking direction of 30 to 400% of the length in the shrinking direction of the portion X in which the superabsorbent polymer 26A is arranged, particularly 80 to
It is configured to be 300%. This improves both the contraction efficiency and the absorption capacity.

<Eighth Embodiment of Body Fluid Absorbent Part> As described above, the contractible material 27 and the body fluid absorbent material 26 are fixed intermittently in the longitudinal direction by the adhesive 28 or the like, or are sewn by a sewing machine. However, the portion 28 of the contractible material 27 that is fixed to the carrier 26B of the body fluid absorbent material 26 is difficult to contract. Further, as described above, in the form in which the superabsorbent polymer is intermittently arranged, the portion X of the carrier 26B where the superabsorbent polymer 26A is arranged is also unlikely to contract.

Therefore, in this case, as shown in FIGS. 11 and 12 in addition to FIG. 5, these fixing portions 28 and X are made to correspond in the contracting direction, and the other portions fix the contracting material 27 and the carrier 26B. It is desirable not to do it. Thereby, the shrinkable material 27 and the body fluid absorbent material 2
Both 6 will be able to effectively contract.
On the other hand, if the fixing portion 28 of the shrinkable material 27 corresponds to the non-absorptive polymer non-arranged portion Y, or if the entire shrinking direction of the shrinkable material 27 is fixed to the carrier 26B, the shrinkage of one member. Is constrained by being fixed to the other member, which makes it difficult to contract and the contraction efficiency decreases.

<Ninth and Tenth Embodiments of Body Fluid Absorbing Part> On the other hand, as described above, by using the bag-shaped carrier 26B, it becomes possible to dispose more polymers 26A at one place. However, the remaining unswelled polymer 26 is swollen by the swollen polymer 26A in the placement portion.
Local gel blocking, in which absorption into A is inhibited, is likely to occur. In order to prevent this, the bag-shaped carrier 26B may be formed to have a large size in consideration of the swelling volume of the superabsorbent polymer 26A.
Since the volume increases about 50 times due to body fluid absorption, the width of the bag-shaped carrier 26B becomes too large in consideration of this, and it becomes difficult to store the bag-shaped carrier 26B in the body fluid absorbing portion.

Therefore, in the present invention, it is recommended that the bag-shaped carrier 26B is formed to be expandable by the expansion of the superabsorbent polymer inside. This not only requires a small space for initially placing the bag-shaped carrier 26B, but also
The bag-shaped carrier 26B accompanying the swelling of the superabsorbent polymer 26A
, The local gel blocking is less likely to occur. The ninth and tenth embodiments described below adopt this folding configuration.

In the ninth embodiment, as shown in FIG.
A bag-shaped carrier 26B containing a superabsorbent polymer 26A,
The folded portion is arranged in the body fluid absorbing portion in a state of being folded in the width direction orthogonal to the contracting direction, and the folded portion is opened and restored and expanded by the expansion of the superabsorbent polymer inside. The number of folds is not particularly limited, but two folds,
It is preferable to make at most three folds, and the width in the folded state is preferably half or less of the width in the unfolded state. As a result, the bag-shaped carrier 26 that is initially required
In addition to the advantage that the space for disposing B is small, the bag-shaped carrier 26B can be deformed as the superabsorbent polymer 26A swells, so that local gel blocking is less likely to occur.

Specifically, in this case, as shown in FIG. 14, a bag-shaped carrier 26B containing a superabsorbent polymer 26A.
It is desirable to arrange the inside of the body fluid absorbent portion 1 (in this case, on the back side sheet 22) in a state where both side end portions 26c, 26c are folded back toward the center in the width direction. Figure 1
As shown in FIG. 6, when the seal for forming the compartments r1, r2 ... Is not performed, it is opened to both sides, but the seal for forming the compartments r1, r2. When performing, the seals sl, sl ... Can be opened on both sides prior to folding as shown in FIG. 17 (not limited to this). Thus, as shown in FIG. 14, when the polymer 26A expands, the bag-shaped carrier 26B becomes a folded portion 26c,
26c is opened and restored to form a new absorption surface. In other words, the folded part that absorbed body fluid opens on both sides and the unabsorbed part located underneath it is exposed, so the swollen polymer blocks the supply of body fluid to the remaining unswollen polymer. It will not be done.

Of course, as shown in FIG. 18, one side may be folded back to the other side with respect to the center in the width direction.

In the tenth embodiment, as shown in FIGS. 19 and 20, the bag-like carrier 26B is provided with tacks tk and tk. In the illustrated example, the tacks tk, t are provided on both sides of the bag-shaped carrier 26B with folding lines along the expansion and contraction direction.
forms k. Forming the tacks tk and tk in this manner has an advantage that the bag-shaped carrier 26B can be easily expanded in the thickness direction. However, in the present invention, the tack tk may be provided only on one side portion or on the entire side, or the tack tk may be formed along the width direction or along the oblique direction. In the illustrated example, one-tuck is adopted, but two-tuck,
You may increase the number of tacks, such as three tacks.

Thus, as shown in FIG. 21, due to the expansion of the superabsorbent polymer 26A inside, the tack tk, tk
Can be expanded and expanded.

<Eleventh Embodiment of Body Fluid Absorber> Although not shown, the bag-shaped carrier 26B is formed by subjecting the bag-shaped carrier 26B to shape processing such as wrinkling in advance, or by forming the bag-shaped carrier 26B with a stretchable material. By this, super absorbent polymer 2
The above-mentioned effect of preventing local gel blocking can also be exhibited by configuring so that it can expand in response to the expansion of 6A.

<Twelfth Embodiment of Body Fluid Absorber> As in the above-described ninth embodiment, the folded portions 26c, 26c of the bag-shaped carrier 26B are opened and restored in response to the expansion of the polymer 26A. In this case, the area occupied by the bag-shaped carrier 26B in the body fluid absorbent portion 1 widens after absorbing body fluid. Even in the fifth embodiment, widening is inevitable. Therefore, when a plurality of bag-shaped carriers 26B are arranged side by side, it is desirable to separate them from each other to some extent, but in that case, the number of bag-shaped carriers 26B arranged in the body fluid absorbent portion 1 is reduced and the absorption capacity is reduced. It cannot help but decline.

Therefore, it is preferable that the bag-shaped carrier itself or another member is constituted so as to suppress expansion in the width direction. As a concrete means for this, for example, in the case of the above-mentioned fourth embodiment, as shown in FIG.
A seal portion sl formed by joining the facing surfaces in the thickness direction to each other in a continuous line from one end to the other end in the width direction of the bag-shaped carrier 26B after being folded by a joining means such as heat sealing or hot melt adhesion. , Sl ... are provided in the shrinking direction of the absorbent 25 at intervals. The seal portions sl, sl ... Can be configured in common with the above-mentioned seals for forming the compartments r1, r2.

Thus, as shown in FIG. 23, since the seal portion does not expand in the width direction, the bag-shaped carrier expands mainly in the thickness direction and hardly expands in the width direction. Therefore, the expanded polymers due to the expansion of the bag-shaped carrier 26B are less likely to adhere to each other, the supply of body fluid to the unswollen polymer is less likely to be hindered, and the above-described local gel blocking prevention effect is exhibited, and the bag-shaped carrier 26B It is possible to increase the absorption capacity by arranging a large number of them in parallel with each other.

<Thirteenth Embodiment of Body Fluid Absorber> Also in the case of the tenth embodiment described above, as shown in FIG. 24, the bag-shaped carrier 26B after the formation of the tacks tk, tk is It is possible to provide a plurality of seal portions sl, sl ... Formed by joining the facing surfaces in the thickness direction in a continuous line form from one end to the other end in the width direction at intervals in the contracting direction of the absorbent material 25. Also, as shown in FIG. 25, expansion in the width direction is suppressed as in the seventh embodiment. In particular, as in the illustrated example, the tuck tk, tk is formed on both sides of the bag-shaped carrier 26B with folding lines along the expansion and contraction direction, and the bag-shaped carrier 2 is formed.
It is preferable that 6B easily expand in the thickness direction.

<Fourteenth Embodiment of Body Fluid Absorber> First
The contractible material 27 in the thirteenth embodiment is arranged in the widthwise central portion of the bag-shaped carrier 26B in the folded state as shown in the drawing, and the contracting action of the contractible material 27 with respect to the bag-shaped carrier 26B. Acting evenly in the width direction, and thus the absorbent material 2
5 is preferable because it contracts linearly (14th
Embodiment).

<Fifteenth Embodiment of Body Fluid Absorbing Section> In the body fluid absorbing body 20, as shown in FIG. 26, the channel space 24 is arranged along the longitudinal direction (front-back direction) of the product. desirable. Further, the absorbing material 25 has a fixing portion 30 in which a part thereof is fixed by, for example, an adhesive or heat welding (melting).
It is desirable to have The absorber 25 can be fixed by bonding it to the back sheet 22 with an adhesive. In the illustrated form, the common end of the absorbent 25, 25 ... Group is used as the fixed part 30.

In this embodiment, as shown in FIG.
When the urine is excreted in the zone Z and the urine comes into contact with the contractible material 27 through the topsheet 2, it contracts itself, and the body fluid absorbent material 26 integrated with it also contracts. As a result, as shown in the figure, the portion absorbed by the body fluid absorbent material 26 first escapes from the body fluid discharge portion, and a new portion of the body fluid absorbent material 26 is placed in place of this. That is, the position of the absorbent portion of the body fluid absorbent material 26 that is updated with the body fluid discharge changes with respect to the body fluid discharge site. Therefore, the entire absorbent material 25 can be effectively used.

<Sixteenth Embodiment of Body Fluid Absorbing Section> On the other hand, as shown in FIG. 28, absorbent materials 25, 25 arranged in parallel are provided.
On the other hand, the form in which the fixing portions 30 are staggered is also effective.

<Seventeenth Embodiment of Body Fluid Absorbing Part> The fixing part 30 may be at the end of the absorbent material 25 or in the vicinity of the end part. The end portion on the opposite side of the fixing portion 30 may be temporarily fixed to the extent that when the contracting force of the contractible material 27 acts, the contracting force disengages. This temporary fixing is desired in order not to cause the displacement of the absorbent 25 during the manufacturing process or the transportation process of the product.

<Eighteenth Embodiment of Body Fluid Absorbing Section> On the other hand, as shown in FIG. 29, the channel space 24 and the absorbent 25 can be arranged along the width direction of the product.

<Nineteenth Embodiment of Body Fluid Absorbing Part> When the fixing parts 30 are arranged in a staggered manner, FIG. 30 (an example in which the absorbent material 25 is arranged along the longitudinal direction of the product) and FIG. As shown in the example in which 25 is arranged along the product width direction),
The plurality of absorbent materials 25 having the fixing portion 30 on one side and the plurality of absorbent materials 25 having the fixing portion 30 on the other side are excretion regions a
It can be configured to wrap only at r. In this case, each absorbent material 25 can be concentratedly arranged in the excretion region, and the length of each absorbent material 25 can be shortened, so that the material cost can be reduced.

<Twentieth Embodiment of Body Fluid Absorbing Part> As shown in FIG. 6, in order to have the arrangement configuration of the sixteenth embodiment, body fluid absorbers 20, 20 provided with a plurality of absorbent materials 25 are shown.
Can be stacked. Although not shown, a plurality of body fluid absorbers 20, 20 each including one or a plurality of absorbers 25 may be arranged in parallel or stacked.

<Twenty-first Embodiment of Body Fluid Absorbing Part> Particularly, as shown in FIG. 6, sheet-like body fluid absorbing bodies 20, 2 are provided.
In the case of stacking a plurality of 0s, it is desirable to stack them zigzag so that they overlap in the excretion region, and to provide the fixing portions 30 at the ends that do not overlap, as shown in FIG. In this case, the body fluid absorber 2 exposed in the excretion region ar
Each time there is excretion in zone 0 of 0, the body fluid absorber 20
Moves to the side of the fixed portion 30, and the surfaces of new lower body fluid absorbers 20 and 20 can appear in sequence as shown in FIGS. 33 and 34. For the sake of explanation, FIGS. 32 to 34 show the bodily fluid absorbers shifted from each other.

<Twenty-second Embodiment of Body Fluid Absorbing Part> In the above example, the contractible material 27 is extended over the entire length of the body fluid absorbing material 26, but as shown in FIGS. Then, one end 271 of the shrinkable material 27 is fixed at a predetermined position such as an end portion in the product longitudinal direction, and the other end 272 on the opposite side of the fixing portion 30 is connected to the one end 261 of the body fluid absorbent material 26. It may be configured to do so. In this case, the body fluid absorbent 2
It is desirable that the other end of 6 extends beyond the excretion region ar to the other end in the longitudinal direction of the product.

<Twenty-third Embodiment of Body Fluid Absorbing Part> As in the fifteenth embodiment described above, when one end of the absorbent material 25 is fixed to the body fluid absorbing part, the shrinkage forming the absorbent material 25 is reduced. The absorbent material 27 contracts toward the fixed end 30 side between the absorbent material and the body fluid absorbent portion as the body fluid is absorbed. On the other hand, the shrinkable material 27
Gradually contracts while absorbing body fluid. Therefore, if the liquid retaining member LK does not always exist at the contraction movement destination of the contractible material 27, there is a possibility that sufficient body fluid absorption cannot be achieved.

For this purpose, as shown in FIG. 37, the liquid retaining member LK is provided so as to cover the entire shrinking direction of the shrinkable material 27.
Can be provided. However, in this case, since the portion Z where the body fluid is discharged is always constant, a wasteful portion that does not function is generated in the liquid retaining member LK. Further, in this case, the body fluid is diffused by the liquid retaining member LK to reach a site where the body fluid should later be absorbed and contracted, and the absorption function and the contraction function may be deteriorated when the site later absorbs the body fluid. There is also.

Therefore, more preferably, as shown in FIG. 38, it is desirable that the liquid retaining member LK is eccentrically located on the fixed end 30 side of the absorbent 25 and the bodily fluid absorbent portion 1, and in particular, the liquid retaining member LK. It is desirable to provide the portion only from the fixed end portion 30 to a position (for example, a urination position) Z corresponding to the body fluid discharge organ. As a result, the contractible material 27 moves due to contraction, but the liquid retaining member LK always exists at the destination thereof.
Since the body fluid can be continuously supplied to the shrinkable material 27, the shrinkable material 27 can be sufficiently shrunk. Further, the other end side portion Y of the shrinkable material 27 corresponding to the portion where the liquid retaining member LK is not provided is pulled by contraction of the portion of the shrinkable material 27 on the fixed end portion 30 side, and thus the liquid retaining member LK.
When the body fluid is absorbed later, it can be contracted while receiving body fluid replenishment by the liquid retaining member LK, and efficient renewal is possible. Further, with such a configuration, the length of the liquid retaining member LK can be suppressed to the necessary minimum, and the cost can be reduced.

Particularly, when the liquid retaining member LK is provided only in the portion from the fixed end portion 30 to the position (for example, the urination position) Z corresponding to the body fluid discharging organ, the other portion Y on the other end side where the liquid retaining member LK is not provided is provided. The bodily fluid is less likely to diffuse, and when the site Y later absorbs the bodily fluid, the possibility that the absorbing function and the contracting function are deteriorated is reduced.

On the other hand, the liquid retaining member LK of the present invention can be individually provided in a plurality corresponding to each absorbent 25 as shown in FIG. 3 and the like, but as shown in FIGS. 37 and 38, It is also possible to configure so as to cover the entire area where the plurality of absorbers 25 are arranged.

(Other Modes) In the above embodiment,
The body fluid absorber 20 is arranged below the topsheet 2.
However, in the forms such as FIG. 3 to FIG. 6 in which the absorbent material 25 is arranged between the use surface side sheet 21 and the back surface side sheet 22, the use surface side sheet 21 itself permeates body fluid, so that the use surface The side sheet 21 itself can be the “surface layer” referred to in the present invention, that is, the surface sheet 2 can be omitted.

In each of the above examples, the absorbent 25 is arranged in the channel space 24 formed by the use side sheet 21 and the back side sheet 22. However, in the present invention, as long as the absorbent material 25 can be contracted, it is not limited to being arranged in the channel space 24, and the arrangement position can be appropriately selected.

In the currently marketed paper diapers, a non-shrinkable absorbent material is mainly composed of cotton-like pulp (fluff pulp) and a rectangular absorbent core having a certain degree of rigidity (semi-rigidity) is wrapped with crepe paper. It is provided in the body fluid absorbent portion. In the present invention, the above-described shrinkable absorbent material 25 can be provided together with this non-shrinkable absorbent material, and in this case, the shrinkable absorbent material 25 is provided at an appropriate position inside and outside the non-shrinkable absorbent material, specifically, as a surface sheet. It can be arranged at a site such as between the crepe paper, between the crepe paper and the absorbent core, inside the absorbent core, between the crepe paper and the leakproof layer (not shown).

The shrinkable material 27 may be filamentous or spun yarn. The carrier 26B can also be filamentary or spun yarn. Further, as previously mentioned, the carrier 26B can be a ribbon or tape slit of a sheet of short fibers or long fibers. The carrier 26B can have a bag-like structure having a plurality of layers or a matrix structure. Therefore, the superabsorbent polymer 26A can also be fixed between the carriers 26B of a plurality of layers, on the surface, or in the matrix structure and on the surface.

[0100]

(Experiment 1) Verification of liquid retaining effect of liquid retaining member As shown in FIG. 39, samples A to C are juxtaposed on a single liquid impermeable back sheet material 22 (made of polyethylene plastic film). Then, the liquid holding effect of the liquid holding member was compared and verified. The absorbent material 25 of each sample is a shrinkable material (trade name "Solvlon" manufactured by Nichibi Co., Ltd.) 27, a carrier (made of crepe paper) 26B, a super absorbent polymer and a use surface side sheet 21.
Are laminated in this order, one end of which is fixed to the backsheet material 22 and have the same length (length in the direction orthogonal to the plane of FIG. 39). It should be noted that the superabsorbent polymer is made continuous only in the section of 10 mm in length,
They were provided intermittently in the longitudinal direction at intervals of m.

However, sample A is a comparative example in which a liquid retaining member is not provided, and sample B is a crepe paper (non-liquid retaining member) LU between the shrinkable material 27 and the backsheet material 22.
This is a comparative example in which K is interposed (non-fixed), and sample C is a hydrophilic spunbonded nonwoven fabric LK as a liquid retaining member between the shrinkable material 27 and the backsheet material 22 (non-fixed).
It is the example made to do.

When artificial urine was dropped on each of the samples at the substantially central portion in the longitudinal direction, 28 samples of sample A were obtained.
The film shrank by mm and the shrinkage ratio was 10%. On the other hand, the sample B shrank by 18 mm and the shrinkage ratio was 6%, and the sample C shrank by 72 mm and the shrinkage ratio was 25%. From this result, it is understood that when the liquid retaining member of the present invention is provided, the contraction efficiency is remarkably increased by the liquid retaining action.

(Experiment 2) Verification of Wet Friction Force Reduction Effect of Liquid Retaining Member Next, as shown in FIG. 40, there is no leakage between the rectangular surface sheet 2 and the leak preventive layer 3 which are in direct contact with the wearer's skin. Liquid-permeable backsheet material 22, liquid-retaining member (hydrophilic spunbonded nonwoven fabric) LK, shrinkable material (Nichibi Co., Ltd. product name "Solvlon") 27, carrier (crepe paper) 26B, super absorbent polymer and use The surface side sheet 21 is laminated in this order, and one end of the absorbent material portion except the liquid retaining member LK is fixed to the back sheet material 22 as an example, and the liquid retaining member L
A configuration in which K was replaced with a non-liquid retaining member (crepe paper) LUK was used as a comparative example. For each of these examples and comparative examples, artificial urine was used to moisten the appropriate places to cause contraction, and the wet frictional force between the liquid retaining member LK or the non-liquid retaining member LUK and the liquid impermeable backsheet material 22 was measured. did. The super-absorbent polymer was made to be continuous only in a section having a length of 10 mm, and this was intermittently provided in the longitudinal direction at intervals of 20 mm.

As a result, as shown in FIG. 41, the example in which the liquid retaining member LK according to the present invention is provided has a significantly lower frictional force at the time of contraction than the comparative example.

[0105]

As described above, by using a contractile material that contracts upon contact with body fluid so that the absorbent part for body fluid changes its position, the entire absorbent material can be effectively utilized and Therefore, it is possible to provide a bodily fluid-absorbent article that is thin, has a large absorption capacity, and can withstand wearing for a long time.

Further, since the absorbing portion is renewed with respect to the body fluid discharge site as body fluid is discharged, there is no so-called gel blocking phenomenon that prevents expansion wetting due to swelling of the superabsorbent polymer, and there is no high absorbability. There is an advantage that the function of the polymer is fully exhibited.

Further, the body fluid is held by the liquid retaining member which is in contact with the contractible material, and the body fluid sufficient for the contraction is supplied to the contractible material, so that the absorbent material can be efficiently contracted. become able to.

[Brief description of drawings]

FIG. 1 is a plan view of a disposable diaper in a developed state.

FIG. 2 is a vertical cross-sectional view of a main part thereof.

FIG. 3 is a detailed vertical sectional view of a body fluid absorbent portion.

FIG. 4 is a perspective view of a body fluid absorber.

FIG. 5 is a perspective view of an absorbent material.

FIG. 6 is a vertical cross-sectional view showing another embodiment of the body fluid absorbent portion.

FIG. 7 is a front view of another example of the absorbent material.

FIG. 8 is a front view of another example of the absorbent material.

FIG. 9 is a vertical cross-sectional view of a disposable paper diaper showing another embodiment of the body fluid absorbent portion.

FIG. 10 is a detailed vertical sectional view thereof.

FIG. 11 is a perspective view of the relevant part.

FIG. 12 is a longitudinal sectional view showing the contracted state.

FIG. 13 is a vertical sectional view of a disposable paper diaper showing another embodiment of the body fluid absorbent portion.

FIG. 14 is an enlarged longitudinal cross-sectional view of a main part showing another embodiment of a body fluid absorbent part.

FIG. 15 is an enlarged vertical cross-sectional view of a main part showing a state when absorbing body fluid.

FIG. 16 is an enlarged perspective view of a main part.

FIG. 17 is an enlarged perspective view of a main part.

FIG. 18 is an enlarged vertical cross-sectional view of a main part showing another embodiment of a body fluid absorbent part.

FIG. 19 is an enlarged vertical cross-sectional view of a main part showing another embodiment of a body fluid absorbent part.

FIG. 20 is an enlarged perspective view of a main part.

FIG. 21 is an enlarged vertical cross-sectional view of essential parts showing a state when absorbing body fluid.

FIG. 22 is an enlarged perspective view of an essential part showing another embodiment of the body fluid absorbent part.

FIG. 23 is an enlarged vertical cross-sectional view of essential parts showing a state when absorbing body fluid.

FIG. 24 is an enlarged perspective view of an essential part showing another embodiment of a body fluid absorbent part.

FIG. 25 is an enlarged vertical cross-sectional view of essential parts showing a state when absorbing body fluid.

FIG. 26 is a plan view of an arrangement form of a body fluid absorber with respect to a product.

FIG. 27 is a plan view showing the arrangement of products for explaining the movement of the absorbent material of the body fluid absorbent body during urination.

FIG. 28 is a plan view of another arrangement mode of the body fluid absorber with respect to the product.

FIG. 29 is a plan view of another arrangement form of the body fluid absorber with respect to the product.

FIG. 30 is a plan view of another arrangement mode of the body fluid absorber with respect to the product.

FIG. 31 is a plan view of another arrangement form of the body fluid absorber with respect to the product.

FIG. 32 is a plan view of another arrangement mode of the body fluid absorber with respect to the product.

FIG. 33 is a plan view showing a first bodily fluid absorption state.

FIG. 34 is a plan view showing a second bodily fluid absorption state.

FIG. 35 is a plan view showing another integrated mode of an absorbent material and a body fluid absorbent material.

FIG. 36 is a plan view showing another form of integration of an absorbent material and a body fluid absorbent material.

FIG. 37 is a plan view of the arrangement of the liquid retaining member of the present invention.

FIG. 38 is a plan view of another arrangement mode of the liquid retaining member of the present invention.

FIG. 39 is a vertical sectional view of a sample of Experiment 1.

FIG. 40 is a vertical sectional view of a sample of Experiment 2.

FIG. 41 is a graph showing experimental results of experiment 2.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body fluid absorption part, 2 ... Surface sheet (surface layer), 3 ... Leak-prevention layer, 4 ... Outline sheet, 20 ... Body fluid absorber, 21 ... Use side sheet, 22 ... Back side sheet, 23 ... Fixed part , 24
... Channel space, 25 ... Absorbent material, 26 ... Body fluid absorbent material, 26A ... Super absorbent polymer, 26B, 26B1 ... Carrier, 27 ... Shrinkable material, 28 ... Adhesive agent, 30 ... Fixed part, L
K ... Liquid retaining member, r1, r2 ... Compartment, X ... Polymer arranging portion, Y ... Polymer non-arranging portion, Z ... Urinating portion.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI Theme Coat (reference) A61F 13/534 13/539 (72) Inventor Kiyohiro Otani Otojuku, Shiren-gun Tochigi Prefecture Sawa 4776-4 Elleair Papertech Co., Ltd. (72) Inventor Yuka Kurita Kirenkawa-cho, Shioya-gun, Tochigi Large character Washishaku Kannosawa 4776-4 Elleair Papertech Co., Ltd. F-term (reference) 3B029 BA01 BA18 4C003 AA08 BA04 BA07 BA08 DA01 HA06 4C098 AA09 CC02 CC05 CE05 CE07 CE08 DD10 DD22 DD25 DD27 DD30

Claims (6)

[Claims] 1. A liquid-permeable surface layer provided on the side of the body facing the skin, a leak-proof layer provided on the side away from the skin of the body, and a body fluid-absorbing portion provided between the two. An absorbent article having a shrinkable material having a predetermined length that shrinks upon contact with body fluid, a carrier substantially integrated with the shrinkable material, and a superabsorbent polymer retained by the carrier. An absorbent material composed of a body fluid absorbent material and a contraction material that is disposed in the body fluid absorbent portion such that the contractile material is contractible, and a liquid retaining member that is in contact with the contractible material of the absorbent material is provided. A body fluid absorbent article, comprising: 2. The body fluid absorbent article according to claim 1, wherein the liquid retaining member is formed of at least one of thin paper and non-woven fabric. 3. The body fluid according to claim 1, wherein the absorbent material is fixed to the body fluid absorbent portion at one end, and the liquid retaining member is unevenly distributed on the fixed end side of the absorbent material. Absorbent article. 4. The bodily fluid-absorbent article according to claim 1, wherein the shrinkable material is sandwiched between the liquid retaining member and the carrier. 5. The liquid retaining member according to claim 1, wherein the liquid retaining member does not protrude from a side end of the carrier and at least substantially covers the entire width direction of the shrinkable material. The body fluid absorbent article according to item 1. 6. The bodily fluid-absorbent article according to claim 1, wherein the absorbent material is arranged on the leakproof layer via a liquid retaining member. The body fluid absorbent article described.