... The screw stem and cylinder are made of 38CRMOALA high quality alloy steel after fine finishing and nitrogen treatment, which ... of LDPE , HDPE, LLDPE, MLLDPE, PA etc. packing film. This type film has good barrier ability, moisture, damp proof, rain-proof ... etc.Main Technical Variables Model3SJ-G1500Suitable materialLDPE LLDPE HDPE EVA Film width400-1500mmFilm thickness(mm)0.028-0.12Max. extrusion ...