JPH06209825A - Conductive fiber product and its production - Google Patents

Abstract

PURPOSE:To provide conductive fiber product having no possibility of deteriorating the electrical conductivity of conductive fibers by wear and heat and no possibility of degrading the electrical conductivity and dust removing performance by laying down and bending of the fibers during use and the process for production thereof. CONSTITUTION:This conductive fiber product 1 has a raised part 3 which consists of the high-conductivity fibers 4 and the low-conductivity fibers 5 having the electrical conductivity lower than the electrical conductivity of the high-conductivity fibers 4. The fiber lengths of the high-conductivity fibers 4 and the low-conductivity fibers 5 in the raised part 3 are the low-conductivity fibers > high-conductivity fibers. At least a part of the fibers are crimped. This product 1 is obtd. by using the high- conductivity and high-thermal shrinkage fibers 4 and low-conductivity fibers 5, either of which has thermal crimps, selecting these fibers in such a manner that the thermal shrinkage is higher to attain the high-conductivity fibers > low-conductivity fibers to obtain the product having the raised part of the fiber lengths approximately equal to each other, then subjecting the product to a heat treatment to shrink the high- conductivity fibers 4 larger than the low-conductivity fibers 5 and to generate crimps in at least either of the fibers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive fiber product which can be used as a static eliminator in, for example, a copying machine and a method for producing the same.

[0002]

2. Description of the Related Art Conductive fibers are used for various purposes. One of the uses is to remove static electricity from a drum or paper of a copying machine and to suck dust by the static electricity. There is a static eliminator used to scrape off. As the static eliminator, conductive fibers are sandwiched between aluminum plates or the like to form a brush, and a double-ply weave structure of conductive fibers is woven, cut and wound around a core material to form a roll brush. Things are known.

As the conductive fibers in this type of static eliminator, conventionally, those produced by metal plating, copper sulfide coating, composite spinning method, or the like, or those obtained by compositely integrating a conductive polymer and fibers are used. Etc. are used.

However, these conductive fibers have insufficient abrasion resistance and their conductivity is apt to be deteriorated by abrasion, and the conductivity is apt to be deteriorated by heat. Therefore, the conductive fibers are always applied to a high heat portion such as a drum of a copying machine. The static eliminator that is in direct contact has a problem that the conductivity decreases in a relatively short period of time. Further, since the tip of the conductive fiber is always in contact with the drum or the like, dust is likely to adhere to the conductive fiber, and there is a problem that the conductivity decreases due to the adhesion of the dust.

Further, in the above conventional static eliminator, the conductive fibers are prone to fall or bend, and as a result, problems such as deterioration in static electricity removal performance and dust scraping performance have occurred.

The present invention has been made in view of the above points,
For example, it is an object of the present invention to provide a conductive fiber product excellent in durability of conductive performance when used as a static eliminator and a manufacturing method thereof.

[Means for Solving the Problems]

That is, the conductive fiber product of the present invention comprises a napped fiber comprising a highly conductive fiber and a low conductive fiber having a conductivity lower than that of the highly conductive fiber or having substantially no conductivity. And a fiber length of the high-conductivity fiber and the low-conductivity fiber in the napped part is such that low-conductivity fiber> high-conductivity fiber and at least one of the fibers is crimped. Is characterized by.

The above-mentioned highly conductive fibers are preferably those in which polypyrrole is compositely integrated with the fibers to impart conductivity.

The first method for producing a conductive fiber product of the present invention is a high conductivity fiber, and a low conductivity having a conductivity lower than that of the high conductivity fiber or having substantially no conductivity. At least one of the conductive fibers has a heat-crimping property, and has a heat shrinkage ratio of high conductive fiber> low conductive fiber A napped portion having a substantially equal length is formed, and then heat treatment is performed to shrink the highly conductive fiber in the napped portion more than the low conductive fiber, and at the same time, the fiber having thermal crimping property is crimped. The length has a relation of low conductive fiber> high conductive fiber, and at least one of the fibers forms a napped portion that is crimped.

In the first manufacturing method, the napped portion composed of the low-conductivity fiber and the high-conductivity fiber having substantially the same fiber length has the low-conductivity fiber and a heat shrinkage ratio larger than that of the low-conductivity fiber. It is preferable to cut and form a substantially central portion of the fiber portion composed of the low-conductivity fiber and the high-conductivity fiber in the added woven fabric obtained by using the high-conductivity fiber.

The second method for producing a conductive fiber product of the present invention is a step of forming a napped portion with a low heat-shrinkable fiber and a high heat-shrinkable fiber in which at least one of the fibers is heat-crimpable, Along with providing high conductivity to the shrinkable fiber by giving higher conductivity than the low heat shrinkable fiber, the low heat shrinkable fiber has a lower conductivity than the high conductivity fiber, or is substantially conductive. Conducting treatment step with a low conductive fiber not having, shrinking the high heat shrinkable fiber more than the low heat shrinkable fiber, a heat treatment step of crimping the fiber having the heat crimping property, through the above, The fiber length of the high-conductivity fiber and the low-conductivity fiber is such that low-conductivity fiber> high-conductivity fiber, and at least one of the fibers forms a crimped portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of an essential part of a conductive fiber product 1 of the present invention. The conductive fiber product 1 includes a base 2 and a base 2.
And a napped portion 3 which is integrated with the napped portion 3. The napped portion 3 is composed of a high conductive fiber 4 and a low conductive fiber 5, and the high conductive fiber 4 among these fibers is crimped.

The material constituting the base 2 is a natural or synthetic fiber such as polyester fiber, polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, aromatic polyimide fiber, cotton, rayon, wool, hemp and polyvinyl alcohol fiber. Examples thereof include woven fabrics, non-woven fabrics, knitted fabrics, metal foils and films made of fibers.

The surface resistance value of the highly conductive fiber 4 constituting the raised portion 3 of the conductive fiber product 1 of the present invention is 1
It is preferably 0 ⁸ Ω or less. As the highly conductive fiber 4, a metal plating type conductive fiber, a copper sulfide dyeing type conductive fiber, a composite spinning type conductive fiber, a conductive polymer polymerization integrated type conductive fiber, or the like can be used.

Examples of the metal-plated conductive fibers include polyacrylonitrile fibers, polyester fibers, polyamide fibers, aromatic polyamide fibers, rayon, etc., on the surface of which fibers are electrolessly plated with silver, nickel, copper, etc. Can be mentioned.

As the copper sulfide dyeing type conductive fiber, a polyacrylonitrile fiber, polyester fiber, polyamide fiber, acrylonitrile in which a water-soluble cupric inorganic salt is reduced by a sulfur-containing reducing agent to fix copper sulfide on the fiber surface. / Vinylidene chloride copolymer type flame retardant acrylic fiber and the like.

Further, as the composite spinning type conductive fiber, acrylic resin, polyester resin mixed with conductive carbon,
Fibers obtained by spinning a polyamide resin or the like into a multi-layer structure, a wedge type structure, a sea-island type structure and the like can be mentioned.

Further, the conductive polymer-polymer integrated type conductive fibers include polyester fibers, polyamide fibers, polyacrylonitrile fibers, aromatic polyimide fibers, polyvinyl alcohol fibers, polypropylene fibers, polyethylene fibers, regenerated cellulose fibers and the like. Examples of the natural or synthetic fiber include a fiber obtained by polymerizing and integrating a conductive polymer such as polypyrrole, polyaniline, and polythiophene. Particularly preferred is a fiber in which polypyrrole is compositely integrated.

The above-mentioned highly conductive fibers 4 can be used by mixing two or more kinds of different kinds. Further, finishing agents such as a smoothing agent, a softening agent, a wax, and an oiling agent may be applied to the high-conductivity fiber 4 as an aqueous solution, emulsion, aqueous dispersion, organic solvent solution, or the like. It is preferable to add these finishing agents to prevent yarn breakage during weaving.

The "low conductivity" of the low-conductivity fiber 5 in the present invention means that the conductivity is lower than that of the high-conductivity fiber 4, that is, the relative "low conductivity". .
Therefore, in the present invention, as the low-conductivity fiber 5, not only all the conductive fibers having a lower conductivity than the high-conductivity fiber 4, but also a non-conductive fiber having substantially no conductivity can be used. . As the material, a highly conductive fiber or a natural or synthetic fiber similar to the material forming the base is used.
The preferred low conductive fiber 5 is a fiber having a surface resistance value of 10 ⁸ Ω or more. The low-conductivity fiber 5 can be formed by mixing two or more kinds of different kinds.

The fineness of the high-conductivity fiber 4 and the low-conductivity fiber 5 to be used varies depending on the use of the conductive fiber product 1, but is usually preferably about 1 to 65 denier. In particular, when it is used for the purpose mainly for removing static electricity, it is preferably 25 denier or less, particularly about 1 to 3 denier, and when used for the purpose mainly for removing dust, about 5 to 20 denier is particularly preferable. Moreover, it is preferable to make the low-conductivity fiber 5 thicker than the high-conductivity fiber 4, and in this case, it is preferable to make it about 1 to 5 times thicker although it depends on the material. The length of the low conductive fiber 5 varies depending on the use of the conductive fiber product 1, but is generally 0.5 to 1.
It is preferably about 0 mm, especially about 1 to 8 mm. The difference in fiber length between the high-conductivity fiber 4 and the low-conductivity fiber 5: ΔL is 0.1
~ 3 mm is preferred.

In the present invention, the ratio of the high-conductivity fiber 4 and the low-conductivity fiber 5 used is preferably high-conductivity fiber: low-conductivity fiber = 1: 99 to 60:40.

In the embodiment shown in FIG. 1, the conductive fiber product 1 is formed by separately using the thread 6 made of the high conductive fiber 4 and the thread 7 made of the low conductive fiber 5. As shown in FIG. 2, the conductive fiber product 1 can be formed by using the yarn 8 in which the high conductive fiber 4 and the low conductive fiber 5 are mixed and spun.

Although the highly conductive fibers 4 are crimped, the crimped state and degree are such that the free length of the fibers is reduced to form a spiral shape or a wavy shape, and the collapse of the low conductive fibers is suppressed. Therefore, it is preferable to have a spatial spread. As the crimp of the fiber, a crimp obtained by forming a napped portion using a thermal crimp generated when a fiber having a potential for thermal crimp contracts by heat treatment and a high elongation woolly processed yarn. Etc.

In the conductive fiber product 1 of the present invention, it is sufficient that either the high conductive fiber 4 or the low conductive fiber 5 constituting the napped portion 3 is crimped, as shown in FIGS. As described above, it is not limited to the case where only the high-conductivity fiber 4 is crimped, and although not particularly shown, either the case where only the low-conductivity fiber 5 is crimped or the case where both fibers are crimped May be Further, the high conductivity fiber 4 and / or the low conductivity fiber 5
The crimp may be applied only to a part of the above. When both fibers are crimped, the fibers are entangled with each other and the lodging can be further prevented.

The conductive fiber product 1 of the present invention is a static electricity removing tool for removing static electricity charged on the drum or paper of a copying machine, a dust collector for a vehicle window, a stabilizer for the purpose of earthquake prevention, and a magnetic tape running cleaning. It can be used as material.

In particular, a conductive fiber product using a fiber having a low friction coefficient such as a fluorine-based fiber as the low-conductive fiber 5 exhibits static electricity removing performance without impairing the stain resistance and lubricity of the fluorine-based fiber. It is suitable as a stabilizer for automobile window glass, and can also prevent dust from adhering to fluorine-based fibers.

In order to manufacture the conductive fiber product 1 of the present invention, a method of manufacturing by using high conductivity fiber and low conductivity fiber, and conductivity is imparted to the napped fiber by post-treatment. Then, the manufacturing method is adopted. The first method for producing the conductive fiber product 1 of the present invention is as follows. First, at least one has a heat crimping property, a low conductive fiber, and a high conductive fiber having a heat shrinkage ratio larger than that of the low conductive fiber. A method of forming a napped portion in which the lengths of both fibers are substantially equal to each other and subjecting to heat treatment, and as a method for obtaining a product having the napped portion,

A method of removing a part of warp or weft of a plain woven fabric composed of low-conductivity fiber and high-conductivity fiber. A method of cutting an intermediate portion of a warp yarn of a cloth for croset, which comprises low-conductivity fibers and high-conductivity fibers. A method of electrostatically implanting low-conductivity fibers and high-conductivity fibers on a cloth, a film, a metal foil, a metal rod, or the like. A method for raising a woven fabric composed of low-conductivity fibers and high-conductivity fibers. A method for producing a woven or knitted fabric having pile-shaped raised parts using low-conductivity fibers and high-conductivity fibers. A method of using a low-conductivity fiber and a high-conductivity fiber as warp or weft to form a woven fabric (velvet, plush, corduroy, etc.). And the like, and a method of obtaining a product having a planar (two-dimensional) napped portion, and a method of to obtain a product having a three-dimensional (three-dimensional) napped portion.

In the fiber products obtained as these knitted woven fabrics, the case where the yarn made of the high conductive fiber and the yarn made of the low conductive fiber are mixed and used, and the high conductive fiber and the low conductive fiber are used. In some cases, a yarn obtained by mixing and spinning and is used.

3 and 4 schematically show the method for obtaining the conductive fiber product 1 by the above method (double velvet weave). In FIG. 3, two sets of warp yarns and weft yarns are used to design two base fabrics 2a, and a yarn made of a low conductive fiber 5 and a yarn made of a highly conductive fiber 4 having a crimp property are used as warps 9. FIG. 4 is a perspective view of a main part of the added woven fabric 10, and by cutting an intermediate part of the warp 9 of the woven fabric 10, the high conductive fiber 4 and the low conductive fiber having substantially the same fiber length as shown in FIG. Two sheet-like products 1a having napped portions 3a composed of 5 and 5 are obtained. The base 2 of the product 1a can be made into a product with a predetermined width if necessary.

Next, a highly conductive fiber 4 having a substantially equal fiber length.
1 having a napped part 3a composed of a low conductive fiber 5 and
Heat-treat a. Highly conductive fiber 4 by this heat treatment
Is crimped to obtain a conductive fiber product 1 of the present invention having a raised portion 3 in which the fiber length of the high conductivity fiber 4 is shorter than the fiber length of the low conductivity fiber 5 as shown in FIG. FIG. 2 is a cross-sectional view of essential parts showing an embodiment in which a yarn 8 obtained by mixing and spinning high-conductivity fiber 4 and low-conductivity fiber 5 is used.

The high conductivity fiber 4 and the low conductivity fiber 5 are
A fiber having a relationship of heat shrinkage ratio of low conductive fiber <heat shrinkage ratio of high conductive fiber is selected so that a difference in fiber length: ΔL is generated by the heat treatment, but the value of ΔL is within the preferable range. So that the difference in heat shrinkage between the two is 1 to 60
% Is preferable.

The difference in heat shrinkage can be obtained by appropriately combining fibers having different heat shrinkability depending on spinning conditions, heat setting conditions, heat history, residual strain, draw ratio, etc., and twisting conditions, By adjusting the weaving conditions, the conductivity imparting conditions, the heat treatment conditions and the like, the difference in the heat shrinkage can be adjusted within the above range.

In order to impart heat crimpability to the fiber, a method using a twisting yarn, a method of forming a so-called side-by-side type fiber in which materials having different heat shrinkability in the longitudinal direction of the fiber are compounded, and the like can be adopted. . For example, as a combination of materials with different heat shrinkability that make up the side-by-side type fiber,
Examples thereof include polyester fibers obtained by combining polyester resins having different molecular weights, chemical structures, and crystallinity.

Examples of the heat treatment method include dry heat treatment, hot water immersion treatment, and heated steam atmosphere exposure treatment.

As a method for rationally carrying out the above heat treatment, (a) a method for drying and / or thermosetting reaction of an adhesive used for adhering fibers in a product having a napped portion obtained by electrostatic flocking A method of simultaneously performing heat treatment and heat treatment for shrinking the fibers. (B) Adhesion back-coated on the base 2 in order to fix the base 2 (base cloth 2a) of the product 1a having the napped portion 3a as shown in FIG. Method for simultaneously performing heat treatment for drying and / or thermosetting reaction of agent and heat treatment for shrinking fiber, or after forming napped portion, shrink and crimp in heated steam Method. Etc.

As the above-mentioned adhesive, it is preferable to use an emulsion type adhesive or an aqueous solution type adhesive when it is desired to increase the shrinkage rate of the fiber. This is because the heat shrinkage of the fiber becomes remarkable in the presence of water. Examples of emulsion type adhesives include polyacrylic ester type, polyurethane type, styrene-butadiene copolymer type, acrylic ester-butadiene copolymer type, ethylene-vinyl acetate copolymer type, chloroprene rubber type, acrylonitrile-butadiene copolymer type. System, vinyl acetate-acrylic acid ester copolymer system and the like. Examples of the aqueous adhesive include starch-based, acrylic acid-acrylic acid ester copolymer-based, polyurethane-based, polyvinyl alcohol-based, polychloroprene rubber-based, polyvinyl acetate-based, vinyl acetate-acrylic acid ester-based, ethylene- Examples thereof include vinyl acetate copolymer system. If necessary, a conductive material such as conductive carbon or metal fine particles may be added to these adhesives.

The second method for producing the conductive fiber product 1 of the present invention is such that at least one of the fibers has a heat crimping property and the napped portion is formed by using fibers having different heat shrinkage rates. Then, it is a method of producing through a step of causing shrinkage and crimping by a heat treatment and a step of imparting conductivity to the fiber by a conductive treatment to form a highly conductive fiber. For example, by the above-mentioned methods, at least one of the fibers is a heat-shrinkable low-heat-shrinkable fiber and a high-heat-shrinkable fiber to form a napped portion in which the fiber lengths of both fibers are substantially equal, and then, by heat treatment. A method in which one fiber is crimped to form a high-conductivity fiber or a low-conductivity fiber by the electroconductivity treatment, or a short fiber and a long fiber that are made highly electroconductivity by the electroconductivity treatment are used for electrostatic After flocking, heat treatment, electroconductivity treatment, or using crimped fibers,
Examples of the method include forming a napped portion containing crimped fibers by the method described above, and then performing heat treatment and conductivity treatment.

Either of the heat treatment step and the conductivity treatment step may be performed first, or may be performed simultaneously.

As a method for making conductive, a water-soluble cupric inorganic salt is reduced with a sulfur-containing reducing agent to directly react and fix copper sulfide to the fiber to give conductivity (referred to as copper sulfide method). , A method of reacting and fixing copper sulfide to fibers by the same treatment as above after pretreating the fibers with polyethyleneimine (referred to as polyethyleneimine / copper sulfide method), pyrrole,
Examples thereof include a method in which monomers such as aniline and thiophene are polymerized and integrated on at least the surface of the fiber using ammonium disulfate, ferric chloride and the like as a catalyst (referred to as a conductive polymer integration method).

By adopting a combination of fibers depending on the method of the electroconductivity treatment, one of the fibers can be electroconductivity selectively or so that the low electroconductivity fiber and the high electroconductivity fiber are formed. . Even in the case where the napped portion is formed by using the conductive fiber, it suffices that the low conductivity fiber and the high conductivity fiber are formed by imparting conductivity higher than the original conductivity.

Specific examples of the combination of fibers according to the electroconductivity treatment include (a) when the electroconductivity treatment is carried out by the copper sulfide method, polyamide fibers, polyimide fibers, polyester fibers as low electroconductivity fibers, Fluorine-based fibers or the like are selected alone or in combination, and polyacrylonitrile-based fibers are used as the highly conductive fibers. (B) When conducting the conductive treatment by the polyethyleneimine / copper sulfide method, a fluorine-based fiber is selected as the low-conductive fiber, and a polyamide-based fiber or a polyester-based fiber is combined as the high-conductive fiber. (C) When conducting the conductive treatment by the conductive polymer integration method, select a fluorine-based fiber or the like as the low-conductive fiber, and select polyacrylonitrile-based fiber, polyamide-based fiber, or polyester-based fiber as the high-conductive fiber. combine. Etc. are illustrated.

The heat treatment is carried out by a dry heat treatment, a hot water immersion treatment, a heating steam atmosphere exposure treatment, or the like, whereby the fiber having a large heat shrinkage is shrunk and the fiber having a heat crimping property is crimped. However, as a method for rationally performing the above heat treatment, (c) a drying treatment after conducting the conductive treatment by the conductive polymer integration method and a heat treatment for shrinking and crimping the fibers are simultaneously performed. Method. (D) By heating during the conductive treatment by the copper sulfide method,
A method of shrinking and crimping fibers. (E) A method of shrinking and crimping fibers when treated with polyethyleneimine, which is a pretreatment step, when conducting a conductive treatment by the polyethyleneimine / copper sulfide method. Etc.

The electrically conductive fiber product 1 of the present invention can also be produced by using the above-mentioned method, or the like method, using crimped electrically conductive fibers, and one of the fibers has thermal crimpability. It can also be obtained by electrostatically implanting a long low-conductivity fiber and a short high-conductivity fiber, and then heat treating to crimp one fiber. When producing fibers by electrostatically implanting fibers with different lengths, it is particularly effective when using fibers with a low heat shrinkage ratio as highly conductive fibers (or fibers to which high conductivity is imparted). is there.

Next, the present invention will be described in more detail with reference to specific examples.

Example 1 Fluorine fiber (450D / 30F) is used as a low-conductivity fiber, and polyester fiber (350D) having an increased thermal crimping property is used.
/ 24F, low elongation woolly processed yarn) is used as a highly conductive fiber made of polypyrrole as a conductive material. Fluorine fiber is 20,000 fibers / square inch and conductive treated polyester fiber is 16,000 fibers / square. Double velvet weave so that it is inch, cut approximately the center of both fibers, and the fiber length of the napped part is 5 mm
Got the product.

The conductive treatment of the above heat-crimpable polyester fiber is carried out by keeping a 1.5% owf pyrrole monomer aqueous solution containing ferric chloride as an oxidizing agent at 23 ± 2 ° C. The method of immersing the fiber in the above for 180 minutes was adopted. The fibers after the electroconductivity treatment were washed and then dried under reduced pressure at 65 ° C. for 4 hours under reduced pressure. The base material is polyester:
A rayon = 65: 35 blended yarn composed of 50-count twin yarns was used.

Next, a polyacrylic acid ester emulsion adhesive having a solid content of 40% (trade name: Boncoat, manufactured by Dainippon Ink and Chemicals) was applied to the back surface of the above product so that the solid content was 50 g / m ^2. Then, the adhesive was dried by heating at 140 ° C. for 10 minutes, and at the same time, the fiber was thermally shrunk to obtain the target conductive fiber product.

In this electrically conductive fiber product, fluorine fibers were exposed on the surface of the napped portion, and the electrically conductive polyester fiber was shorter than the fluorine fiber by about 2.5 mm, and the crimp was significantly increased. This product has a friction charge voltage of 100V
It was below. The conductivity durability of this product is 70 ℃
When tested by x95% RH moisture heat acceleration test, 70 ° C. heat aging test, light resistance test (63 ° C. black panel temperature) and friction fastness test (500 g load, cotton cloth), extremely excellent results were obtained.

Further, when the napped portion of the product after the friction test with the load against the glass plate of 1 kg and 10,000 times was observed, the fibers of the napped portion did not fall or bend and excellent conductivity was maintained. It was recognized that This conductive fiber product was suitable as a stabilizer for automobile window glass.

Example 2 A rayon fiber (420D / 60F) was used as a low-conductivity fiber, and an acrylic fiber (100D /
50F, for high bulky yarn) is made of polypyrrole, which is used as a highly conductive fiber. Rayon fiber is 50,000 fibers / inch2, and acrylic resin is 3.3.
Double velvet weaving was performed so as to have 10,000 fibers / square inch, and substantially the center of both fibers was cut to obtain a product with a fiber length of 5 mm in the napped portion.

The conductive treatment of the acrylic fiber having the latent thermal crimp property is in a cone state (apparent density: 0.20 g / cc).
Then, a method was employed in which a 1.2% owf pyrrole monomer aqueous solution using ferric chloride as an oxidizing agent was kept at 23 ± 2 ° C. and the fibers were immersed in the solution for 180 minutes to circulate. The treated fiber was washed with water and dried under reduced pressure at 65 ° C. for 4 hours in a cone state. As the base fabric, the same polyester / rayon = 60/35, 50 count twin yarn as in Example 1 was used.

After applying the same adhesive as in Example 1 to the back surface of the above product, the adhesive was dried by heating at 140 ° C. for 10 minutes and the polyester fiber was heat-shrinked to obtain a conductive fiber product. . In this product, rayon fiber was exposed on the surface of the napped portion, and the acrylic fiber subjected to the conductive treatment was shorter than the rayon fiber by about 2.0 mm and crimped. This product has a frictional electrification voltage of 100 V or less,
In addition, the durability of conductivity was extremely good. Furthermore, it was confirmed that even after the durability test of the cleaning brush roll, the fibers of the napped portion did not fall over or bend, and the excellent static electricity removing ability was maintained.

Comparative Example 1 The same procedure as in Example 1 was conducted using conductive fibers obtained by subjecting the same polyester fibers used in Example 1 except that they did not have a crimping property to a conductive treatment by the same method. The fiber length of the napped portion was 5 mm, which was used as it was as a conductive fiber product. This conductive fiber product had a frictional electrification voltage of 100 V or less, but the fluorine fiber and the conductive polyester fiber had the same fiber length, so that the surface smoothness was poor, and the load against a glass plate was 1 kg, and after a friction test of 10,000 times. The conductive fibers fell, which was not preferable as a window stabilizer.

Comparative Example 2 Acrylic fibers to be electroconductive with polypyrrole were used, except that fibers having no crimpability but heat shrinkability were used.
A product with a napped portion of 5 mm was obtained in the same manner as in Example 2, and this product was heat-treated to obtain a product in which the fiber length of the acrylic fiber was shorter than the fiber length of the rayon fiber. In the product after heat treatment,
Difference in fiber length between rayon fiber and acrylic fiber: ΔL is 1.0
It was mm.

This product was excellent in both frictional electrification voltage and conductivity durability, but fiber collapse was observed after the cleaning brush roll durability test.

Example 3 Fluorine fiber (1000D / 500F) and acrylic fiber (300D / 60F × 3) having heat-crimping property were mixed and woven using a polyester woven fabric as a base fabric, and a napped portion having a width of 12 mm was formed. Formed. The number of fibers in the width direction of the napped portion is 8 fluorine fibers
And 4 acrylic fibers, and the nap length was 3 mm including the base cloth. Then, after applying the same adhesive as in Example 1 to the back surface of the above product, heating the adhesive at 140 ° C. for 10 minutes to dry the adhesive and crimping the acrylic fiber to make it shorter than the fiber length of the fluorine fiber. And

Thereafter, this product was added to the fiber in an amount of 0.5% by weight.
Was immersed in an aqueous solution of pyrrole monomer and reacted at 10 ° C. for 2 hours using ammonium persulfate as a catalyst, and polypyrrole was polymerized and integrated on at least the surface of the base fabric and the acrylic fiber to make it conductive. On the other hand, no polypyrrole was formed on the fluorine fiber, and the fluorine fiber was not provided with conductivity.

The frictional electrification voltage of this product was 100 V or less, and the conductivity durability was extremely good. Further, in the durability test of the cleaning brush roll, it was confirmed that the fibers of the napped portion did not fall or bend, and the excellent static electricity removing ability was maintained.

Example 4 A napped portion was formed using the same fibers as in Example 3, the same adhesive was applied to the back surface of the base fabric, and heat treatment was performed in the same manner. Then, the fiber weight ratio was 0.5%. Sodium thiosulfate, 0.75
% Aqueous solution containing copper sulfate at 20 ° C. for 120 minutes for treatment. As a result, the acrylic fiber in the napped portion was selectively made conductive, but the fluorine fiber was not substantially provided with conductivity.

The frictional electrification voltage of this product was 100 V or less, and the durability of conductivity was very good. Further, in the durability test of the cleaning brush roll, it was confirmed that the fibers of the napped portion did not fall or bend, and the excellent static electricity removing ability was maintained.

Example 5 Fluorine fiber (1000D / 500F) and heat-crimpable 6-nylon fiber (1000D / 68F) were used, and the fiber number ratio of the napped portion was as follows: fluorine fiber: nylon fiber = 8: 4 was mixed and woven to form a napped portion having a width of 12 mm. Next, the same adhesive as in Example 3 was applied to the back surface of the base fabric, and then heat treatment was performed in the same manner as in Example 3 to crimp the nylon fiber to a length shorter than the fiber length of the fluorine fiber.

Then, it was immersed in a 0.5% pyrrole monomer aqueous solution in a fiber weight ratio, and the pyrrole monomer was reacted at 10 ° C. for 2 hours using ammonium sulphate in a molar ratio of 2.5 times that of the monomer. When polymerized, the base cloth and the nylon fiber were given conductivity, but the fluorine fiber was not substantially given conductivity.

The frictional electrification voltage of this product was 100 V or less, and the durability of conductivity was extremely good. Further, in the durability test of the cleaning brush roll, it was confirmed that the fibers of the napped portion did not fall or bend, and the excellent static electricity removing ability was maintained.

[0067]

As described above, the conductive fiber product of the present invention has a napped portion composed of a high conductive fiber and a low conductive fiber, and the high conductive fiber and the low conductive fiber in the napped portion. Since the fiber length of <1> is such that low conductive fiber> high conductive fiber, it is difficult for the conductivity of the high conductive fiber to decrease due to abrasion. Also, when used as a static electricity removing tool for a drum of a copying machine, the highly conductive fibers do not always remain in contact with a high temperature drum or the like, and therefore, there is an effect of preventing deterioration of conductivity due to heat.

Furthermore, since at least one of the high-conductivity fiber and the low-conductivity fiber is crimped, the napped portion is excellent in elasticity,
As a result, there is little risk that the conductivity of the fibers of the napped portion will fall or the bending of the fibers will lower the conductivity and dust removability.

Further, according to the method for producing a conductive fiber product of the present invention, a low conductive fiber and a high heat shrinkable fiber having a heat shrinkage ratio higher than that of the low conductive fiber (or a high heat shrinkable high conductive fiber). If both fibers are selected in consideration of the difference in heat shrinkage and the crimpability in advance, the fiber length easily has a relationship of low conductive fiber> high conductive fiber by heat treatment, and It is possible to easily obtain a conductive fiber product in which at least one of the fibers is crimped, and it is possible to efficiently manufacture an excellent conductive fiber product.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an example of a conductive fiber product of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing another example of the conductive fiber product of the present invention.

FIG. 3 is a schematic perspective view of a fluffed woven fabric used for producing a conductive fiber product of the present invention.

FIG. 4 is a vertical cross-sectional view of a product obtained by cutting approximately the center of the warp of the fluffed fabric shown in FIG.

[Explanation of symbols]

 1 conductive fiber products 3 napped part 4 high conductivity fiber 5 low conductivity fiber 9 hair length 10 added woven fabric

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[Procedure amendment]

[Submission date] November 18, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014] As the material constituting the base 2, polyester fiber, polyamide fiber, polyacrylonitrile fiber, polypropylene fiber, aromatic poly amide fiber <br/> Wei, cotton, rayon, wool, hemp, polyvinyl alcohol Examples thereof include woven fabrics, non-woven fabrics, knitted fabrics, metal foils and films made of natural or synthetic fibers such as fibers.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

[0019] As the further conductive polymer polymerized integrated conductive fibers, polyester fibers, polyamide fibers, polyacrylonitrile fibers, aromatic poly amide fibers, polyvinyl alcohol fibers, polypropylene fibers, polyethylene fibers, regenerated cellulose fibers Examples thereof include fibers obtained by polymerizing and integrating a conductive polymer such as polypyrrole, polyaniline, and polythiophene on the surface of natural or synthetic fibers such as, and particularly those in which polypyrrole is combined and integrated with fibers are preferable.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

Example 1 Fluorine fiber ( 2400D / 360F ) was used as a low-conductivity fiber, and polyester fiber (35
0D / 24F, low elongation woolly processed yarn) is used as a highly conductive fiber, which is made of polypyrrole, and has 20,000 fluorine fibers / square inch and 16,000 polyester fiber that has been electrically conductive. Double velvet weaving was performed so as to have a square inch, and substantially the center of both fibers was cut to obtain a product with a fiber length of the napped portion of 5 mm.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction content]

Example 3 Fluorine fiber ( 2400D / 360F ) and acrylic fiber (300D / 60F × 3) having heat crimping property were mixed and woven using a polyester woven fabric as a base fabric, and a napped portion having a width of 12 mm was formed. Formed. The number of fibers in the width direction of the napped part is 8 fluorine fibers and 4 acrylic fibers, and the napped length is 3 mm including the base cloth.
And Then, after applying the same adhesive as in Example 1 to the back surface of the above product, heating the adhesive at 140 ° C. for 10 minutes to dry the adhesive and crimping the acrylic fiber to make it shorter than the fiber length of the fluorine fiber. And

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction content]

Example 5 Fluorine fiber ( 2400D / 360F ) and heat-crimpable 6-nylon fiber (1000D / 68F) were used, and the fiber number ratio of the napped portion was fluorine fiber: nylon fiber = 8: 4 was knitted to form a napped portion having a width of 12 mm. Next, the same adhesive as in Example 3 was applied to the back surface of the base fabric, and then heat treatment was performed in the same manner as in Example 3 to crimp the nylon fiber to a length shorter than the fiber length of the fluorine fiber.

Claims (5)

[Claims] 1. A napped portion comprising a high-conductivity fiber and a low-conductivity fiber having a conductivity lower than that of the high-conductivity fiber or having substantially no conductivity, and the napped part. Conductive fiber product characterized in that the fiber lengths of the high-conductivity fiber and the low-conductivity fiber in the section are such that low-conductivity fiber> high-conductivity fiber and at least one of the fibers is crimped. . 2. The conductive fiber product according to claim 1, wherein the highly conductive fiber is a fiber in which polypyrrole is compositely integrated with the fiber to impart conductivity. 3. A highly conductive fiber and at least one of a low conductive fiber having a conductivity lower than that of the highly conductive fiber or having substantially no conductivity has a thermal crimping property. Then
Moreover, a high-conductivity fiber and a low-conductivity fiber having a relationship that the heat shrinkage ratio is high-conductivity fiber> low-conductivity fiber form a napped part in which the fiber lengths of both fibers are substantially equal, and then heat treatment is performed to The highly conductive fiber in the napped part shrinks more than the low conductive fiber, and the fiber having the heat crimping property is crimped so that the fiber length has a relationship of low conductive fiber> high conductive fiber. A method for producing a conductive fiber product, comprising forming a napped portion in which at least one fiber is crimped. 4. The method for producing a conductive fiber product according to claim 3, wherein the napped portion in which the fiber lengths of the low-conductivity fiber and the high-conductivity fiber are substantially equal to each other, and the low-conductivity fiber and the high-conductivity fiber are formed. A method for producing a conductive fiber product, which is characterized in that the fiber portion formed of the low-conductivity fiber and the high-conductivity fiber in the added woven fabric obtained by use is cut to form a substantially central portion. 5. A step of forming a napped portion with a low heat-shrinkable fiber and a high heat-shrinkable fiber in which at least one fiber is heat-crimpable, and the high heat-shrinkable fiber is provided with higher conductivity than the low heat-shrinkable fiber. And a high conductive fiber, and a low heat-shrinkable fiber having a conductivity lower than that of the high conductive fiber, or a conductive treatment process of a low conductive fiber having substantially no conductivity, high heat While shrinking the shrinkable fiber to a greater extent than the low heat shrinkable fiber, a heat treatment step of crimping the fiber having thermal crimpability, and a fiber length of the high conductive fiber and the low conductive fiber Low-conductivity fiber> high-conductivity fiber, and forming a napped portion in which at least one fiber is crimped, a method for producing a conductive fiber product.