... LDPE),high density polyene(HDPE) SJ-60(70)Single-Screw Double Die Film Blowing machinePerformance and Characteristics It ... and industrial products etc.1.The machine adopts single screw to extrude the material,two die heads to ... blow the film.2.The screw stem and cylinder are made of 38CRMOALA ... die head is plated with hard chrome,of screw mandrel type structure with even and smooth ...