| 摘要 |
PURPOSE:To remarkably stabilize the electrical conductivity characteristics under pressure of a compsn. and to facilitate the production thereof, by mixing electrically conductive particles obtd. by firing and carbonizing a spherical high-molecular material with an insulating matrix material having rubbery elasticity and dispersing them therein. CONSTITUTION:Electrically conductive particles obtd. by firing and carbonizing a high-molecular material in the form of spherical particles are mixed with and dispersed in an insulating matrix material having rubbery elasticity. Examples of said matrix material are natural rubbers, synthetic rubbers such as chloroprene, silicone rubber, etc., thermoplastic elastomers such as urethane, EVA, etc., and liquid rubbers such as urethane, silicone, etc., and silicone rubber is preferred. Examples of the spherical high-molecular material are spherical particles obtd. by suspension-polymerizing styrene, vinyl chloride, vinylidene chloride, methyl methacrylate, etc. and spherical particles obtd. by chemically powdering a resol resin, etc. The electrically conductive particles have particle sizes of pref. 50-100mum and are used in an amount of 20-60vol% based on the total amount of the compsn.
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