JP4520780B2 - Absorption band - Google Patents

Description

  The present invention relates to an absorption band suitable for use as an absorption band for body wearing such as disposable diapers and sanitary products, or an absorption band such as a wiping cloth.

  Absorbent bands for body wear such as diapers and sanitary napkins have a surface sheet with liquid permeability and breathability on the side in contact with the skin, and a liquid-impervious and breathable back sheet on the back side. The structure has a structure in which an absorption band or an absorption layer is arranged in a plane between them. For the absorption band, a super-absorbent polymer material capable of absorbing a liquid 100 times or more of its own weight is used, and the absorption capacity is increased without increasing the bulkiness.

  In order to increase the liquid absorption capacity of the absorption band, it is sufficient to increase the amount of the absorbent material, but if the amount of the absorbent material is increased, the absorption band arranged in a flat shape becomes bulky, and the followability to the movement of the body As a result, there is an adverse effect that the feeling of wearing becomes worse. Moreover, in the absorption band arrange | positioned planarly, a liquid is easy to be absorbed with the absorber of the surface side, and the absorption capacity of the absorber located inside may not fully be utilized. Further, when the absorbent material on the surface side is saturated, the liquid flows in the plane direction along the surface sheet without being absorbed, so that the wearing feeling is deteriorated, and problems such as liquid leakage also occur.

  In view of these points, an object of the present invention is to propose an absorbent band for body wearing that has a high absorption efficiency of the absorbent material, is not bulky, and has a good wearing feeling.

  Another object of the present invention is to propose an absorption band suitable for use as a wiping cloth having high absorption efficiency.

  In order to solve the above-mentioned problems, the present invention forms an absorbent yarn by forming an absorbent material into a yarn shape, and the absorbent yarn is arranged in a planar shape in a three-dimensional state such as a spiral shape, a loop shape, and a wave shape to absorb the absorbent band. To make up. When the absorbent yarn made of an absorbent material is arranged in a three-dimensional shape, unlike the generally used flat absorbent band, each part of the absorbent yarn can absorb liquid from all directions of the outer circumference ideally. . Therefore, the liquid is efficiently absorbed in each part of the absorbent yarn. Further, since it is molded in a three-dimensional shape, the out-of-plane rigidity is lower than that of a flat absorption band. Therefore, the followability with respect to the movement of the body is improved, and the wearing feeling is good.

In detail, the absorption band of the present invention includes a base sheet, and an absorbent yarn disposed along a surface of said base sheet, wherein the absorbent yarns is provided with a water-absorbing material, and a liquid permeability sheet The water-absorbing material is filled or inserted into the liquid-permeable sheet wound in a cylindrical shape.

  The water-absorbing material may be a mixed material containing pulp and polymer. The liquid-permeable sheet may be a single layer sheet made of a nonwoven fabric or a multilayer sheet including a nonwoven fabric sheet.

  Here, when used as a body-wearing absorbent band such as a disposable diaper or a sanitary napkin, the diameter of the absorbent yarn is generally set to a value within the range of 2 mm to 10 mm. Desirable from a viewpoint.

  Next, the absorbent yarn is preferably arranged on the base sheet so as to have a three-dimensional shape such as a spiral shape, a loop shape, and a corrugated shape. Alternatively, the absorbent yarn may be arranged on the surface of the base sheet in a woven state with a predetermined stitch.

Next, the absorbent band for body wearing according to the present invention includes a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorbent layer disposed between the top sheet and the back sheet, The absorbent layer is formed from absorbent yarns arranged along the planar direction of the front and back sheets, and the absorbent yarn includes a water-absorbing material and a liquid-permeable sheet, and is wound in a cylindrical shape. The water-absorbing material is filled or inserted into the liquid-permeable sheet . It is desirable that the absorbent yarns are arranged so as to have a three-dimensional shape such as a spiral shape or a wave shape. The absorbent layer may be a woven fabric of a predetermined stitch made of the absorbent yarn.

  In the present invention, the absorbent material is formed by forming the absorbent material into a yarn shape, and the absorbent yarn is arranged in a planar direction in a three-dimensional state such as a spiral shape, a loop shape, and a wave shape to constitute an absorption band. When absorbent yarns made of absorbent material are arranged in a three-dimensional shape, unlike the generally used flat absorbent bands, each part of the absorbent yarn ideally absorbs liquid from all directions on the outer circumference. Is possible. Therefore, the liquid is efficiently absorbed in each part of the absorbent yarn.

  Moreover, since it arranges so that it may become a three-dimensional shape, out-of-plane rigidity is low compared with a planar absorption band. Therefore, the followability to the movement of the body is improved, and a body wearing absorption band with a good wearing feeling can be manufactured.

  Hereinafter, an example of an absorbent yarn and an absorbent band to which the present invention is applied will be described with reference to the drawings.

  FIG. 1 shows an example of an absorbent band for body wearing such as a disposable diaper and a sanitary napkin. (A) is a cross-sectional portion thereof, (b) is a perspective view, and (c) is a cross-sectional view of an absorbent yarn. The absorbent band 1 for body wearing of this example includes a top sheet 2 having liquid permeability and air permeability, a back sheet 3 having air permeability but liquid impermeability, and an absorbent layer disposed therebetween. It is composed of four. The top sheet 2 and the back sheet 3 can be formed from a nonwoven fabric or the like.

  The absorbent layer 4 is formed by absorbent yarns 5 arranged in a spiral or loop along the inner surface 3 a of the back sheet 3 and the inner surface 2 a of the top sheet 2. For example, a plurality of spiral absorbent yarns 5 are arranged in the same direction. The absorbent yarn 5 has a structure in which a mixed absorbent material 6 of pulp and polymer is wound in a cylindrical shape by a liquid-permeable sheet 7. The liquid-permeable sheet 7 of this example is a two-layer sheet in which the tissue 7a is disposed on the inner side and the nonwoven fabric 7b is disposed on the outer side. The diameter of the absorbent yarn 5 may generally be a value within the range of 2 mm to 10 mm. The absorbent yarn 5 is fixed between the front and back sheets 2 and 3 by, for example, a hot melt adhesive.

  Here, the absorbent yarn 5 can be manufactured as follows, for example. That is, pulp and polymer are kneaded and squeezed linearly from a nozzle having a predetermined diameter onto the surface of a liquid-permeable sheet made of a nonwoven fabric and tissue arranged in a plane. Next, the liquid-permeable sheet is wound into a cylindrical shape and attached with a hot melt adhesive. Instead of this, the nonwoven fabric fibers may be directly formed on the outer periphery of the absorbent material made of a mixture of pulp and polymer fed from a nozzle having a predetermined diameter. Alternatively, after the absorbent material is formed into a plate shape, it is cut to a certain width to form a thread-shaped absorbent body, and the thread-shaped absorbent body is wound by a liquid sheet to form an absorbent thread. Good. In this case, an absorbent yarn having a rectangular cross section is formed.

  In the body-worn absorption band 1 of this example configured as described above, the absorption layer 4 has a configuration in which the absorbent yarn 5 is arranged in a planar direction so as to have a three-dimensional shape. Therefore, since the surface area is increased as compared with the conventional planar absorption band, the absorption rate and the absorption efficiency are increased. In addition, since the absorbent yarns 5 are arranged so as to have a three-dimensional shape, when worn on the body, it is easy to arrange in a state along the body shape, the wearing feeling is improved, and Leakage and back leakage are also prevented.

  In this example, the absorbent yarns 5 are arranged in a spiral shape or a loop shape, but, of course, the absorbent yarns 5 may be arranged in another three-dimensional shape such as a wave shape. Further, the absorbent yarn 5 may be knitted vertically and horizontally to form a woven state such as a biaxial woven fabric or a four-axial woven fabric. In this case, if the size of the stitch is appropriately set and a predetermined space is formed between the absorbent yarns, the liquid absorption efficiency and the absorption speed can be increased.

  Next, the present invention can be used as an absorption band other than the absorption band for body wearing. For example, it can be used as a wiping cloth. In this case, the absorbent yarns may be arranged on the surface of the base sheet so as to have a three-dimensional shape. Of course, it may be covered with a face sheet so that the hand does not get wet.

(A) is the fragmentary sectional view of the absorption band for body wearing to which this invention is applied, (b) is a fragmentary perspective view, (c) is sectional drawing of an absorption thread | yarn.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorption band for body wearing 2 Top sheet 3 Back sheet 4 Absorbing layer 5 Absorbing thread 6 Absorbing material 7 Liquid-permeable sheet 7a Tissue 7b Nonwoven fabric

Claims (12)

A base sheet,
Having an absorbent yarn disposed along the surface of the base sheet,
The absorbent yarn includes a water-absorbing material and a liquid-permeable sheet, and the water-absorbing material is filled or inserted into the liquid-permeable sheet wound in a cylindrical shape. In claim 1,
The absorbent band, wherein the water-absorbing material is a mixed material containing pulp and polymer. In claim 1,
The liquid-permeable sheet is a single-layer sheet made of a nonwoven fabric or a multilayer sheet including a nonwoven fabric sheet. In claim 1,
Absorption band characterized in that the diameter is in the range of 2 mm to 10 mm. In any one of claims 1 to 4,
The absorbent band, wherein the absorbent yarn is arranged on the base sheet so as to have a three-dimensional shape such as a spiral shape, a loop shape, and a corrugated shape. In any one of claims 1 to 4,
The absorbent band, wherein the absorbent yarn is arranged on the surface of the base sheet in a woven state with a predetermined stitch. A liquid-permeable surface sheet;
A liquid-impervious back sheet,
Having an absorbent layer disposed between the top sheet and the back sheet,
The absorbent layer is formed from absorbent yarns arranged along the planar direction of the front and back sheets,
The absorbent yarn includes a water-absorbing material and a liquid-permeable sheet, and the water-absorbing material is filled or inserted into the liquid-permeable sheet wound in a cylindrical shape. Absorption band. In claim 7,
The absorbent band for body wear, wherein the water-absorbing material is a mixed material containing pulp and polymer. In claim 7,
The absorbent sheet for body wearing, wherein the liquid-permeable sheet is a single-layer sheet made of a nonwoven fabric or a multilayer sheet including the nonwoven fabric sheet. In claim 7,
Absorbing band for body wearing, characterized in that the diameter is in the range of 2 mm to 10 mm. In any one of claims 7 to 10,
The absorbent band for body wearing, wherein the absorbent yarn is arranged on the base sheet so as to have a three-dimensional shape such as a spiral shape, a loop shape, and a corrugated shape. In any one of claims 7 to 10,
The absorbent band for body wearing, wherein the absorbent yarn is arranged on the surface of the base sheet in a woven state of a predetermined stitch.

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