Ptc material and method for producing same, and circuit protection part using such ptc material and method for manufacturing same

摘要

Provided is a polymeric PTC material having excellent PTC characteristics and a low room temperature resistivity at the same time. In the polymeric PTC material comprising a polymer and carbon black, the carbon black has a ratio of DBP absorption to C-DBP absorption of greater than 1.0 but not greater than 1.1.