three-layer Co-extrusion Rotary Die-head film Characteristics:1.Die head is lauer type spiral mandrel, continuous 360, rotation.2. Screen ... on the grounds of preference of analogous lines in foreign and Home. The lines can be blown continuous 0.02-0 ... , anti-rain, anti-roust, insulation oxygen, oil resistive, and so used for light and heavy-duty packaging, for example fresh fruits, meat ...