Composite material with a positive temperature coefficient, useful in heating devices, comprises a vinylidene fluoride (co)polymer in beta crystal form and a conductive filler

摘要

Composite material (I) comprising 40-90% vinylidene fluoride (co)polymer in beta crystal form, 10-60% conductive filler, 0-40% (semi)crystalline polymer and 0-40% additional filler, where the beta crystals are nucleated on the surface of the conductive filler particles.