... Type Screw,Center feed type spiral die,Multi-tuyere air ring,Side cross-sectional and ... mainly used in the production of the three-layer composite packaging film of LDPE, LLDPE, EVA ... the appropriate host, die components can be a two-layer, single-layer packaging film production. Structural features of the ... 2.Die central feeding spiral die 3.Cooling multi-outlet air ring, optional cooling system 4. ...