초록 ▼

The invention relates to a pressure sensitive electro-conductive material which can be utilized as a pressure sensitive electro-conductive switch or as a variable resistor. The switch comprises two electrodes with a deformable pressure sensitive electro-conductive material sandwiched between the ele

The invention relates to a pressure sensitive electro-conductive material which can be utilized as a pressure sensitive electro-conductive switch or as a variable resistor. The switch comprises two electrodes with a deformable pressure sensitive electro-conductive material sandwiched between the electrodes. The electro-conductive material comprises a deformable elastomeric material impregnated with a plurality of electro-conductive micro-agglomerates of unbound finely divided electro-conductive carbon particles enclosed by a matrix of the elastomeric material and finely divided electro-conductive carbon particles bound together by the elastomeric material.

대표청구항 ▼

A process for the preparation of a pressure sensitive electro-conductive material comprising the steps of: a. Preparing a solvent system comprising water, a water miscible carbon-wetting organic solvent, and a surfactant; b. Mixing finely divided electro-conductive carbon particles into the solvent

A process for the preparation of a pressure sensitive electro-conductive material comprising the steps of: a. Preparing a solvent system comprising water, a water miscible carbon-wetting organic solvent, and a surfactant; b. Mixing finely divided electro-conductive carbon particles into the solvent system to form a uniform slurry; c. Maintaining the slurry for a predetermined period of time to obtain substantial wetting of the carbon particles of the solvent system to form a pre-agglomeration composition; d. Dispersing the pre-agglomeration composition into an aqueous elastomeric composition to form an elastomeric-carbon composition containing electrically conductive micro-agglomerates comprising unbound finely divided electro-conductive carbon particles enclosed by a matrix of elastomeric material and bound finely divided electro-conductive carbon particles; and e. Drying said elastomeric-carbon composition to obtain the pressure-sensitive electroconductive material.