Polytetrafluoroethylene [PTFE] PTFE is a kind of engineering plastic,with a wide working temperature range(-180 to +260 ℃),low friction coefficient , excellent electrical properties,high corrosion resistance and non toxic and so on,and can be made with filled(reinforced) materials,such as glass fiber,graphite and bronze,to improve the properties.

PTFE material sheet septa is widely used as sealing gasket and lubricating materials in corrosive media,electrical insulation parts,corrosion resistant materials under various frequencies,bearing valves,chemical piping,lining in the electrical,chemical aerospace and machinery fields,and support slider,etc.