three-layer Co-extrusion Rotary Die-head film Characteristics:1.Die head is lauer type spiral mandrel, continuous 360 ... LDPE, HDPE, LLDPE, MLLPE, by horizontal extrusion up blown. The film has good in solution, for instance holding ... hrExtruderScrew Dia.(mm)45/50/4550/55/5055/65/55Screw L/D Ratio28:1Screw MaterialSACM-645/38 ... 29.0*6.4*8.2 three-layer Co-extrusion Rotary Die-head film blowing machine