Double-color PE film blowing machine two screws, one die head, double-color pe film high quality screw and barrel CE, ISO,SGS It is used for blowing ... various low density polyethylene (LDPE) and high density polyethylene(HDPE) color striped plastic film, etc. Which are ... products. The cylinder and the screw stem of Model SJ-45D×2 extruder are made of high-quality alloy steel ...