| 摘要 |
PURPOSE: To provide a pressure sensitive conductor which can be formed in an optional form in an optional place without requiring a complicated process. CONSTITUTION: Forty five % by capacity of a condensation type silicon as a nonconductive elastomer, 35% by weight of copper having a particle size of 50μm as a conductive metal particle, and 20% by capacity of a thermally expansible elastic microcapsule having an unexpanded particle size of 20μm are sufficiently mixed together. The resulting ink is printed, the silicon is hardened at room temperature to form a conductor followed by heating, and the micro capsule is thermally expanded to provide a pressure sensitive conductor. When the pressurizing force and change of resistance value of the resulting sample are measured, the sample is in the insulated state when the pressurizing force is low, while the resistance value is sharply changed by a pressurization of 1.1kg/cm<2> , and a continued state can be provided. In the case having no thermally expansible elastic microcapsule, on the other hand, the continued state is attained from the non-pressurized state, the resistance value is hardly changed even when the pressuring force is increased, and no pressure sensitivity is shown.
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