... Head Film Extrusion Machine LDPE, HDPE, LLDPE, MLLPE Three-layer Common-Extruding Rotary Die-Head Film Blowing MachineCharacteristics:1.Die ... head is layer type spiral mandrel, continuous 360, rotation.2.Screen ... good in sudation, for instance holding temperature, anti-humid, ant-breeze, anti-rain, anti-roost, insulation oxygen, oil resistive, and so ...