... film could with symmetry or asymmetry structure. The CPA series cover five t Five layer co-extrusion blown ... and casting polyamide film (CPA)With PA,EVOH as barrier layer, co-extrusion ... barrier film could with symmetry or asymmetry structure. The CPA series cover five types of products: Vacuumize package, Deep ... layer co-extrusion blown and casting polyamide film (CPA