PVDF is a transparent and translucent crystalline polymer with 68% of crystalinity, 59% of fluorine content and 250,000-1,000,000 molecular weight. It is the most durable fluor plastic, enjoying high shock strength, abrasion resistance, creeping resistance from -40 to 150癈, excellent resistance to weathering, ozone resistance, irradiation resistance, ultraviolet light proofing, excellent dielectric property and corrosion resistance. It can resist the corrosion of acid, alkali, strong oxidizer and haloids under room temperature.