Anti-caking agent is suitable for the production of polyethylene and polypropylene film products of full density polyethylene equipment ,liner low density polyethylene equipment and high density polyethylene equipment with Holland DSM process and Basell tube process . Anti-caking agent mainly to divide into two types, the anti-blocking master batch with resin carrier and the solid anti-stiff powder without carrier. Anti-blocking master batch is marked as KNPE(for PE products) and KNPP(for PP products) according to the various carriers. Anti-stiff powder without carrier is marked as hydrated magnesium silicate and synthetic silicon dioxide.