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PVDF (Polyvinylidene Fluoride) Kynar®, Sygef®, Solef®
A thermoplastic fluoropolymer with a melt point of 352°F (178°C), and a wide service range from -40°F (-40°C) to 284°F (140°C). It has a very linear chemical structure, and is similar to PTFE with the exception of not being fully fluorinated, i.e. having 3% hydrogen by weight. Its drawbacks in the area of chemical resistance include unsuitability with strong alkalis, fuming acids, polar solvents, amines, ketones, and esters. It has a high tensile strength as well as a high heat deflection temperature. It is readily weldable, offers high purity qualities, and is resistant to permeation of gases. PVDF is a relatively inert material and contributes little in the way of contamination to pharmaceutical water