| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost, and adjust the rate of change of resistance value arbitrarily and easily, by using a liquid rubber for a matrix rubber and mixing carbon particles and a very small quantity of highresistance particles. SOLUTION: A liquid silicone rubber is used for a matrix in which conductive particles and high-resistance particles are to be kneaded. Approximately 50-200 pts.wt. of carbon particles having an average grain size of approximately 2-50μm and approximately 0.1-5 pts.wt. of high-resistance particles having a specific electric resistance of approximately 10-200Ωcm when pressurized at 4.9×10<5> Pa (5 kg/cm<2> ) and having an average grain size of approximately 0.05-5 mm are kneaded into the matrix, thus producing a pressure-sensitive conductive composition. In this case, titanium oxide particles or the like, or particles with their surfaces coated with titanium oxide or the like, are used as the high- resistance particles. By changing the quantity of high-resistance particles to be mixed, the rate of change of resistance value is varied from 10<1> to 10<5> or more. Thus, the rate of change of resistance value is made arbitrarily and easily adjustable and the cost is reduced.
|
