... ) product introduce:Polytetrafluoroethylene [PTFE, F4] is the world's best material for corrosion resistance, it was "king of plastic" ... kind of chemical media, it produces solve our country's chemical industry, petroleum, pharmaceutical and other areas of ... as sealing material and filler material 2) product's technical parameters:PropertyUnitNominal ValueAppearance——white powder, no impuritiesTensile ...