Electrically conductive polymer composition having positive temperature coefficient characteristic and heater employing the same

Abstract

Abstract PURPOSE: To provide titled compsn. suitable for forming a heater having self-temperature control function, by a method wherein an electrically conductive carbon black and graphite are blended with a polymer. CONSTITUTION: (b) About 3W50pts.wt. of an electrically conductive carbon black (e.g. acetylene black, furnace black) and (c) 5W30pts.wt. of graphite are blended with (a) 100pts.wt. of a polymer (e.g. polyethylene, tetrafluoroethylene, silicone rubber) to obtain an electrically conductive polymer compsn. having positive temperature coefficient characteristics. Then the compsn. c is subjected to an extrusion molding so as to coat two pieces of electrode conductors 1, 1' arranged in parallel with common coating of said compsn. to form the desired heater. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Yukio Shimazaki
• 👤 Ryoichi Ito

Bibliographic Details