Polyvinylidene fluoride (PVDF), the homopolymer of 1,1-difluoroethylene, is a tough engineering thermoplastic. The unique structure of alternating methylene and difluoromethylene units along the chain creates a polymer material having high crystallinity combined with a high polarity resulting in a sharp melting point.
PVDF has the characteristic stability of fluoropoly-mers when exposed to harsh thermal, chemical and ultraviolet environments while retaining the properties of a conventional thermoplastic material.