PTC MATERIAL AND METHOD FOR PRODUCING SAME, AND CIRCUIT PROTECTION PART USING SUCH PTC MATERIAL AND METHOD FOR MANUFACTURING SAME

摘要

A polymeric PTC material having excellent PTC characteristics and a low room temperature resistivity is disclosed. The polymeric PTC material contains a polymer and a carbon black, and the ratio of DBP absorption to C-DBP absorption of the carbon black contained in the polymeric PTC material is more than 1.0 but not more than 1.1.