JPS60144367A - Electrically conductive resin composition - Google Patents

Abstract

PURPOSE:To provide an electrically conductive resin compsn. which makes it possible to differentiate performance characteristics and use by coloration, by blending a resin, a specified carbon fiber and a dye or a pigment. CONSTITUTION:A resin compsn. consists of a resin, a carbon fiber and a dye or a pigment in such a proportion that the quantity of a carbon fiber having a volume resistance of 10<-3>-10<12>OMEGA.cm is 1-60pts.wt. per 100pts.wt. resin. When the carbon fiber is used as an electrically conductive material for the electrically conductive resin compsn., the compsn. is little colored by the carbon fiber. Hence, a colorant such as a dye or a pigment is used to obtain an electrically conductive resin compsn. which is colored in various tints. Examples of the carbon fibers are PAN and pitch carbon fibers having an average diameter of 3- 20mu. The carbon fiber is used in a quantity of 1-60pts.wt. per 100pts.wt. resin. It is desirable that a lubricant (dispersion aid) such as metallic soap or a low- molecular polymer is used to facilitate the dispersion of the pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to conductive resin compositions, and more particularly, it is an object of the present invention to provide conductive resin compositions whose performance characteristics and uses can be identified by coloring.

Conventionally, conductive resin compositions made by adding conductive carbon black to various resins have been known. In addition, all the various molded products produced therefrom are black in color, and there is a drawback that they cannot be easily distinguished depending on the purpose or the difference in conductivity.

The inventor of the present invention has conducted extensive research to solve the above-mentioned drawbacks of the prior art by making conductive resin compositions easily visually distinguishable depending on their uses and performance. It has been found that when carbon fibers are used as agents, there is little coloring due to the carbon fibers, and therefore, by using colorants such as dyes and pigments, conductive resin compositions colored in various hues can be obtained. Complete the invention
.

That is, the present invention is composed of a resin, carbon fiber, and dye/pigment, and the carbon fiber is about 1 to 60 parts by weight per 100 parts of the resin, has a volume resistivity of 10-3 to 1O12Ω, and can be identified by coloring. This is a conductive resin composition that is characterized in that it is possible.

To explain the present invention in more detail, the resins used in the present invention include, for example, polyethylene, polypropylene, polystyrene, AS resin, AB S resin, polyacetal, polycarbonate, polyamide, polyester,
General thermoplastic resins such as polyvinyl chloride, fluorine resins, acetate resins, general thermosetting resins such as phenolic resins, unsaturated polyester resins, melamine resins, urea resins, epoxy resins, various rubbers, and more. is a composite material consisting of these compounds and other additives and materials.

Further, the carbon fibers used in the present invention are PAN-based or pitch-based carbon fibers with an average diameter of 3 to 20 μm, and the amount of these carbon fibers added is 1 part to 60 parts per 100 parts of resin.
Department.

Furthermore, the dyes and pigments used in the present invention are azo-based, polyazo-based,
Anthraquinone yarn, quinacridone-based, perylene-based, perinone-based, phthalocyanine-based, flavanthrone-based and dioxazine-based organic dyes and pigments, iron oxide, titanium oxide, Konyu,
Inorganic pigments such as ultramarine, yellow lead, and cadmium pigments and carbon black may be used alone or in a mixture of two or more. Such dyes and pigments are used in a proportion of about 0.1 to 20 parts by weight per 100 parts by weight of resin.

In addition to the above ingredients, lubricants (dispersing aids), such as higher fatty acids such as stearic acid, oleic acid, and linoleic acid, and zinc, magnesium, aluminum, noclium, calcium, etc. are used for the purpose of easily dispersing the pigment. or low molecular weight polymers, such as polymer waxes such as polyethylene wax, polypropylene wax, polystyrene wax, or fatty acid waxes, such as amide, bisamide, etc. such as stearic acid, oleic acid, linoleic acid, montanic acid, etc. alone or It is preferable to use a mixture of two or more. These lubricants are resin 10
Preferably, it is used in a proportion of about 01 to 10 parts by weight per 0 parts by weight.

The conductive resin composition of the present invention consisting of the above components includes:
It may be a simple powder mixture of the above components, but preferably the above components are melt-kneaded by melt extrusion according to a conventional method,
It is best to form the product into pellets. The temperature and other conditions for pelletizing are the same as in the prior art.

The conductive resin composition of the present invention obtained as described above is
Approximately 1 to 60 carbon fibers are used per 100 paper parts of resin.
By changing a certain range on the heavy side, its conductivity (volume resistivity) can be changed from about 10120α to about 10-3Ω, and its 7j! By changing the hue of the dye and pigment used in accordance with the change in electric power, various performances such as conductivity of the resulting conductive resin composition can be easily identified with the naked eye. It is also possible to select the dyes and pigments to be used according to the various uses of the conductive resin composition, and to identify them by use. In addition, as shown in the examples below, molded products made using the conductive resin composition of the present invention have various mechanical properties such as tensile properties, etc., compared to molded products without carbon fibers. The characteristics, creep characteristics, thermal strength, etc. of the songs have been dramatically enhanced. Therefore, the resin composition of the present invention is very useful not only as an antistatic material but also as a conductive material, a surface heating element, an electromagnetic shielding material, and the like.

Next, the present invention will be specifically explained with reference to Examples.

Note that the text in the middle or section is based on weight.

Example 1 Nylon 66 resin (product name: Ube Nylon 66B202
0, Ube Industries Co., Ltd. product) 85 parts, carbon fiber (product name: Pyrofil One part of calcium stearate was mixed therein, and the mixture was charged into a 40-corner dusk-vent type extruder and molded into pellets at a set temperature of 270°C. The colored pellets were dried under vacuum at 80°C for 4 hours, and molded using a 5-ounce injection molding machine at a molding temperature of 270°C and a mold temperature of 80°C to form 50 m+n x 90 tone x 5.
A molded plate with a blue throat color was obtained.

Example 2 Polypropylene resin (Wi5 Product name: Mitsubishi Noblen MA
-2, 80 parts of Mitsubishi Yuka Co., Ltd. product), 20 parts of carbon fiber (trade name: Trading Card MLD100O, manufactured by Toyo Rayon Co., Ltd.), and 1 part of copper phthalocyanine green (trade name: Chromofine Green 2GN, manufactured by Dainichiseika Industries Co., Ltd.) The mixture was mixed with 1 part of magnesium stearate and put into a 40 ttm 95 screw single-vent extruder, and formed into pellets at a set temperature of 210°C. The colored pellets were molded into a 5-ounce injection molding machine at a molding temperature of 200°C and a mold temperature of J! Molded under L80℃ condition, 50 am x 90 than x 5
A green molded plate of +11111 was obtained.

The physical properties of the molded product of the above example are as follows.

Claims (1)

[Claims] It consists of a resin, carbon fiber, and dye and pigment, and the carbon fiber is approximately 1 to 60 parts by weight per 100 parts by weight of the resin, has a volume resistivity of 10-3 to 1012 Ω, and can be identified by coloring. Characteristic conductive resin composition.