... different raw materials by two extruders. FM-SJ Double Layer Rotary Die head Film Blowing MachineMain technical variables: Model: SJ-50X2FM1000, SJ-55X2FM1200, SJ-60X2FM1500 ... L/D: 28: 1Reduced diameter of film (mm): 800, 1000, 1200 Single-face thickness of film (mm): 0.015-0.10Max. Output ... (T): 3, 3.5, 4.5 FM-SJ Double Layer Rotary Die head Film Blowing Machine