three-layer Co-extrusion Rotary Die-head film Characteristics:1.Die head is lauer type spiral mandrel, continuous 360, rotation.2. ... installed to the lies, such as length counting device, vertical cutting device, cooling water row pipe, film spreading roller, scrap ... anti-rain, anti-roust, insulation oxygen, oil resistive, and so used for light and heavy-duty packaging, for example fresh fruits, meat ...