JPH0411017A - Highly hygroscopic conductive fiber - Google Patents

Abstract

PURPOSE:To obtain the subject fiber having excellent moisture absorptivity, moisture permeability and electrical conductivity and a feeling similar to natural fiber by kneading superfine powder of an animal protein fiber and superfine powder of metal, etc., to a polymer such as synthetic fiber and spinning the kneaded mixture. CONSTITUTION:Superfine powder of an animal protein fiber 2(e.g. collagen fiber) and superfine powder of metal, carbide, etc., 3 (preferably Al, carbon, etc.) are kneaded to one or more kinds of fibers 1 selected from synthetic fiber (preferably nylon, etc.), semisynthetic fiber (preferably acetate fiber) and regenerated fiber (preferably rayon) and the kneaded mixture is spun (preferably by core-sheath conjugate spinning using the kneaded composition as the core or the sheath component) to obtain the objective fiber. The moisture-absorptivity and permeability, etc., can be further improved by adding superfine powder of a water-soluble substance (preferably water-soluble gelatin, etc.) to the kneaded composition, kneading the mixture, spinning the composition and removing the water-soluble substance from the spun fiber by washing with water to form a number of through holes.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to composite fiber material technology, which can be freely spun and knitted or woven using the yarn, and has basic properties such as hygroscopicity and moisture permeability. The present invention relates to highly hygroscopic conductive fibers that are not only good but also have excellent conductivity and antistatic properties.

[Prior art] Traditionally, fiber materials that can replace natural fibers include recycled fibers such as rayon, semi-synthetic fibers such as acetate, nylon,
Various fibers are used, including synthetic fibers such as polyester, acrylic, polyethylene, and polypropylene. Among these fiber materials, there are synthetic fiber materials such as polyurethane resins that have relatively excellent moisture permeability and moisture absorption, but compared to natural fibers, their moisture absorption and moisture permeability are generally inferior, and the texture and feel of these materials are inferior. There is no substitute for natural fibers.

In addition, with synthetic fibers, static electricity generated due to friction etc. charges the fibers, causing electrical discharge between the product made of the fibers and the user, which not only gives an unpleasant static shock, but also causes fires due to ignition caused by the electrical discharge. Occurs in many cases.

[Problems to be Solved by the Invention] The present invention was made for the purpose of improving the properties of the above synthetic fiber, which has a dry feel without stickiness due to its excellent moisture absorption and desorption properties, and prevents stuffiness due to its high moisture permeability. It is suppressed and provides a comfortable wearing feeling.

The object of the present invention is to provide a highly hygroscopic conductive fiber that is not only a waterproof and durable composite fiber material but also has an antistatic effect.

[Means for Solving the Problems] The present invention comprises fibers in which ultrafine powdered animal protein fibers and similarly ultrafine powdered conductive substances such as metals are dispersed on the surface of synthetic fibers. In addition, the surface of the synthetic fiber is made porous.

In other words, the highly hygroscopic conductive fiber according to the present invention combines one or more ultrafine powdered powdery protein fibers and one or more ultrafine powdered conductive substances into one synthetic fiber, semi-synthetic fiber, or synthetic fiber. A basic structure can be obtained by kneading with a polymer of recycled fiber or a polymer of chemical fiber material made of a mixture of two or more of these polymers, and then spinning the kneaded composition.

In addition, one or more types of ultrafine powdered animal protein fibers and one or more types of ultrafine powdered conductive substances can be combined with synthetic fibers, semi-synthetic fibers, polymers of regenerated fibers, or two or more of these. After kneading with a polymer of a chemical fiber material made of a mixture of the above polymers, the kneaded composition is spun into a sheath shape that covers the surface of other fibers to create a core-sheath structure or the core fiber and sheath. It is possible to create a core-sheath structure in which the fibers are reversed.

Furthermore, one or more kinds of animal protein fibers that have been made into ultra-fine powder, one or more kinds of conductive substances that have been made into ultra-fine powder, and water-soluble substances that have been made into ultra-fine powder can be used as synthetic fibers, semi-synthetic fibers, or recycled fibers. After kneading with a fiber polymer or a chemical fiber material polymer made of a mixture of two or more of these polymers, the kneaded composition is spun, and during the spinning process, the ultrafine powdered water-soluble substance is washed with water. When removed, the fibers are made into a porous structure with concave dissolution marks.

Here, animal protein fiber refers to the protein that forms the skin, bones, keys, hair, and feathers of animals, including human hair, which is also called "collagen fiber" or "keratin fiber," and includes cowhide, Refers to all animal skins such as pigskin and sheepskin leather, and bird skins. Further, the ultrafine powdered animal protein fiber refers to animal protein fiber whose particle size is smaller than several hundred microns.

In addition, conductive substances refer to conductors such as various metals such as AQeCu and Fe, oxides of metals, or carbides of carbon and various substances, and conductive substances such as ultrafine powdered metals or carbides are defined as refers to conductive material powder that is smaller than several hundred microns.

Furthermore, water-soluble substances refer to water-soluble gelatin, polysaccharides such as starch, and inorganic substances such as salts.

As the fiber material, the following can be effectively used.

Synthetic resin fiber materials nylon, polyester, polyurethane, vinylon, vinylidene, polyvinyl chloride, abrasive, grill, polyethylene, polypropylene, etc.

Semi-synthetic resin material Acetate, diacetate, triacetate, etc.

Regenerated fibers such as rayon, etc. It is well known that natural leather, which is an animal protein fiber, is a material with excellent moisture absorption, moisture permeability, and texture.

Additionally, electrically conductive materials such as metals or carbides are good conductors of electrical current.

In the above structure of the fiber of the present invention, the ultra-fine powdered animal protein fiber and the ultra-fine powdered conductive substance such as metal or carbide are exposed on the surface of the fiber. A special fiber is formed that combines hygroscopicity, moisture permeability, touch and texture formation characteristics similar to those of natural fibers, and an antistatic effect due to the conductive properties of the conductive material.

Furthermore, by making the fiber porous, it was possible to make the fiber flexible, and to make the above-mentioned hygroscopicity, moisture permeability, feel and texture more similar to the characteristics of natural fibers.

As a result, the highly hygroscopic conductive fiber of the present invention is particularly hygroscopic,
It has excellent moisture dissipation and conductivity, and when a fabric or nonwoven fabric is formed by knitting or weaving threads made of this fiber, and this is used as a skin material for artificial leather, for example, it can be used in a high humidity atmosphere on the skin side. Sweat or water vapor tends to move from the outside to the low-humidity atmosphere.

Therefore, when woven with threads of highly hygroscopic conductive fibers having the above structure,
Knitted or non-woven fiber cloth materials (1) have excellent moisture absorption and moisture release properties and can provide a dry feel without stickiness.

(2) It has excellent water vapor permeability and can provide a feeling of wearing without feeling stuffy.

(3) It has qualitative characteristics such as having a texture similar to that of natural fibers, and (4) It has an antistatic effect by grounding static electricity generated in the fibers due to its conductivity.

It comes to have the following electrical characteristics.

[Example] Hereinafter, an example of the highly hygroscopic conductive fiber according to the present invention will be described.

Example 1 20% by weight of cowhide leather finely ground to an average particle size of 5 μm and 20% by weight of carbon powder finely ground to an average particle size of 1 μm were added to a polyurethane resin solution dissolved in dimethyl sulfoxide.
Add and mix thoroughly.

At this time, the finely ground cowhide leather is dried (pre-dried) at 120° C. for 2 hours or more to have a moisture content of 200 ppm.

Through the above steps, a 10 denier fiber was obtained by wet spinning. Furthermore, by pre-drying the cowhide leather powder, it was possible to eliminate thread breakage during spinning.

FIG. 1 is a microscopic sketch showing the cross section of this fiber. 1 is a polyurethane resin fiber main body, 2 is finely crushed cowhide leather, and 3 is finely crushed carbon powder.

11λ To a polyurethane resin solution dissolved in dimethyl sulfoxide, 30% by weight of cowhide leather finely ground to an average particle size of 1 μm and 10% by weight of AQ (aluminum) finely ground to an average particle size of 1 μm were added and thoroughly kneaded. The uniformly dispersed kneaded composition is mixed with W! 4 Adjust.

At this time, the finely ground cowhide leather is pre-dried at 120° C. for 2 hours to have a moisture content of 200 ppm.

This kneaded composition was coated in a sheath shape by wet spinning on the outer periphery of a core fiber made of polyurethane resin spun to 5 deniers.
A fiber with a denier core-sheath structure was obtained.

FIG. 2 is a microscopic sketch showing the cross section of this fiber. A is a core made of polyurethane resin, B is a sheath part, and the sheath part B has finely crushed cowhide leather 2 and AQ4 scattered in a coating made of polyurethane resin fibers 1, and is exposed on the surface of the fibers. .

Nu 11'' North 20% by weight of pig skin finely ground to an average particle size of 5 μm was added to an acrylic resin solution dissolved in a volatile organic solvent, and an average particle size of 2
20% by weight of Cu finely ground to μm and an average particle size of 5 μm
Add 20% by weight of finely ground water-soluble gelatin to the mixture and mix thoroughly.

Through the above steps, a fibril of 20 denier was formed by dry spinning, and the fibril was washed with water to obtain a fiber.

The water-soluble gelatin powder added together with the pigskin leather and Cu was dissolved in water by the water washing.

FIG. 3 is a microscopic sketch showing the cross section of this fiber. 5 is finely ground Cu, 6 is acrylic resin fiber body,
7 is finely ground pigskin leather, and 8 is a hole formed by a dissolution trace of finely ground water-soluble gelatin.

Example 5 In a polyurethane resin solution dissolved in dimethyl sulfoxide, 20% by weight of pigskin leather finely ground to an average particle size of 1 μm and 30% by weight of carbon powder finely ground to an average particle size of 1 μm.
20% by weight of water-soluble gelatin finely ground to an average particle size of 5 μm is added and sufficiently kneaded to prepare a uniformly dispersed kneaded composition.

At this time, the finely ground pigskin leather is pre-dried at 120° C. for 2 hours to give a moisture content of 200 ppm.

This kneaded composition was applied in the form of a sheath by wet spinning to the outer periphery of a core fiber made of a 3-denier polyurethane resin, thereby obtaining a 7-denier core-sheath fiber.

The water-soluble gelatin powder added together with the pigskin and carbon powders was dissolved in water in the spinneret.

FIG. 4 is a microscopic sketch showing the cross section of this fiber. A is a core made of polyurethane resin, B is a sheath, and the sheath B contains finely crushed pigskin leather 7 and finely crushed carbon 3 in a coating made of polyurethane resin fibers 1, and finely crushed water-soluble It is a porous fiber in which through holes 8 are formed by dissolution traces of gelatin.

It should be noted that the highly hygroscopic porous structured fibers produced in Examples 1 to 4 had good spinnability without breaking during the spinning process.

[Effects of the Invention] As described above, the highly hygroscopic conductive fiber of the present invention not only has excellent moisture absorption and moisture release properties similar to those of natural fibers, but also has flexibility when it is porous. , it also has excellent conductivity. Therefore, fabrics or non-woven sheets knitted or woven from these fibers can be used as ordinary clothing materials, interior skin materials, carpet flocking material, and artificial leather and synthetic leather base fabrics for automobile interiors such as steering covers. It has the characteristics that it can be used in a wide range of areas where antistatic properties are desired, and the effects after implementation of the present invention are extremely large.

[Brief explanation of drawings]

1 to 4 are enlarged cross-sectional views showing examples of highly hygroscopic conductive fibers of the present invention. A...Core part, B...Sheath part, 1...Polyurethane resin fiber, 2...Cowhide leather, 3...Carbon, 4...Al,
5...Cu, 6...Acrylic resin, 7...Pig leather, 8...Through pores formed by dissolution marks of water-soluble gelatin. A core part, B sheath part, polyurethane resin fiber, 2
Cowhide leather, 3-111i1! , 4-Afl, 5-Cu. 6 acrylic resin, 7 pig lIi leather, 8 through holes formed by dissolution marks of water-soluble gelatin.

Claims (11)

[Claims] (1) One or more types of ultrafine powdered animal protein fibers and one or more types of ultrafine powdered conductive substances such as metals or carbides are combined into synthetic fibers, semi-synthetic fibers, or regenerated fibers. A highly hygroscopic conductive fiber obtained by kneading with a chemical fiber material polymer made by combining or mixing two or more of these polymers, and then spinning the kneaded composition. (2) One or more types of ultrafine powdered animal protein fibers and one or more types of ultrafine powdered conductive substances such as metals or carbides are combined into synthetic fibers, semi-synthetic fibers, or regenerated fibers. A core-sheath formed by kneading with a polymer of a chemical fiber material made of a combination or a mixture of two or more of these polymers, and then spinning it into a sheath-like shape that covers the surface of other core fibers with the kneaded composition. The structure, or the surface of the core fiber formed by the kneading composition, is made of a polymer of synthetic fiber, semi-synthetic fiber, or recycled fiber, or a polymer of other chemical fiber material consisting of a mixture of two or more of these polymers. A highly hygroscopic conductive fiber with a core-sheath structure. (3) Polymers of synthetic fibers, semi-synthetic fibers, or regenerated fibers made of one or more animal protein fibers that have been pulverized into ultra-fine powder, or polymers of chemical fiber materials made of a mixture of two or more of these polymers. A kneaded composition kneaded with ultrafine powder of one or more metals or conductive substances such as carbides, a polymer of synthetic fibers, semi-synthetic fibers, or recycled fibers, or a mixture of two or more of these polymers. A polymer with a core-sheath structure consisting of a polymer of chemical fiber material and a kneaded composition, one of the kneaded compositions is used as a core fiber, and the other kneaded composition is coated on the outer periphery of the core fiber. Hygroscopic conductive fiber. (4) One or more water-soluble substances that have been made into ultra-fine powder are added and kneaded to the polymer of the chemical fiber material, and then the kneaded composition is spun, and during the spinning process, the water-soluble substances that have been made into ultra-fine powder are 2. The porous highly hygroscopic conductive fiber according to claim 1, wherein the porous highly hygroscopic conductive fiber has a large number of pores formed by dissolution traces formed in the fiber by washing and removing the fiber. (5) One or more water-soluble substances that have been made into ultra-fine powder are added and kneaded to the polymer of the chemical fiber material on the covering side, and then the core-sheath fiber is spun, and the ultra-fine powder is formed in the spinning process. Claim 2 or 3, characterized in that the sheath portion is formed with a large number of through holes formed by dissolution traces by removing the water-soluble substance by washing with water.
The highly hygroscopic conductive fiber having a porous core-sheath structure as described above. (6) The ultra-fine powdered animal protein fiber that is kneaded with the polymer of the chemical fiber material has a moisture content of 5 to 1,000 pp in advance.
The highly hygroscopic conductive fiber according to any one of claims 1 to 5, which is a powder that has been pre-dried to a temperature of 50%. (7) The conductive substance such as metal or carbide is Al, Cu, F
The highly hygroscopic conductive fiber according to any one of claims 1 to 5, which is a conductor such as various metals such as e, oxides of metals, or carbides of carbon and various substances. (8) The highly hygroscopic conductive fiber according to any one of claims 1 to 5, wherein the synthetic resin fiber is a linear polymer such as nylon, polyester, polyurethane, acrylic, polyethylene, or polypropylene. (9) The highly hygroscopic conductive fiber according to any one of claims 1 to 5, wherein the semi-synthetic resin is acetate. (10) The highly hygroscopic conductive fiber according to any one of claims 1 to 5, wherein the recycled fiber is rayon. (11) The highly hygroscopic conductive fiber according to claim 4 or 5, wherein the water-soluble substance is an inorganic substance such as water-soluble gelatin, polysaccharide such as starch, or salt sugar.