We need HDPE, ptfe, PE-RT and resin for aluminum. Specifications of the raw materials which we use for our products. PTFE: Volume Density g / l 475 Melting point 327 For HDPE, We use materials which their specifications are according to followings it will meet our needs: Eracalene BC82 Borstar HE3470-LS Finathene 5502 Equate EMDA-6147