Three layer coextrusion material for packaging bags
At present, there are mainly two kinds of non PVC multilayer coextrusion infusion membrane: three layer structure and five layer structure.The performance of the layers of the three co extruded films for outer: block air, good printing performance; the middle layer with water resistance and anti permeability and elasticity; inner: non-toxic, good heat sealing and elasticity, and the solution has good compatibility.
Five layer co extruded films composed of outer layer of multi ester copolymer, high mechanical strength, the second layer is ethylene methacrylate polymer, the third layer is the fourth layer of polyethylene, polyethylene, the inner layer is modified with ethylene propylene polymer. Five layer co extruded films performance of each layer as outer layer: providing excellent heat sealing and protection, good printing performance; the second layer is connected with the outer layer and third layer; third layer: providing vapor barrier and softness; fourth layer: connection layer and the third layer; inner layer: non-toxic, with compatibility infusion product good, excellent heat sealing and buffering external impact.
Three layer co extruded films composed of outer layer of high mechanical strength polyester or polypropylene, elastic material mixed or SEBS intermediate layer is polypropylene with different proportion (SEBS), mixed layer is polypropylene copolymers with SEBS.
