... surface in the form of a film or pellet. Outlet screw conveyor and frequency inventer is ... used in Polyethylene oligomers, petroleum resin, polyethylene oxide, polyvinyl chloride (PVC), nylon (PA), polyester, phenolic / epoxy ... caustic soda, potassium hydroxide, chromic anhydride, sodium hydrosulfide, calcium chloride dihydrate , sulfur, phosphorus pentasulfide and other inorganic chemical products ...