... of thinwall, seal,gasket,club,panel,tube, No.Item . DF- 17 Grade AQualified1Smoothness & CleanessWhite sheet surface,even texture,no residue quantity ... Rupture(%)≥3002804Volume Density,(g/L)300-4505Residue on sieve (65 μ m)(%)≤36Moisture Content.(%)≤0.047Melting Point(°C372±58Stand Relative Density2.130 ... ,seal ring,andloop ,filling compounds.etc. PTFE molding powder DF-17