... carton or drum Delivery Detail: within 10days PTFE FINE POWDER DF-201 Excellent Grade A Qualified Smoothness & Cleaness White ... sheet surface,fiber is average,no gravel and metalic powder,even sheet texture ≤1 for mechanical impurity(≥0. ... sheet surface,fiber is average,no gravel and metalic powder,allow 0.5mm organic Impurity. 2 Tensile Strength,(Mpa ... make the resin bind together. white ptfe powder