An air cushion film is a film-like material with an interlayer of air bubbles produced in the middle by using polyethylene as a raw material and extruded composite method. Air cushion film is mainly used as packaging material, widely used in shock-proof packaging of glass, electronics, ceramics and other products. It can be processed into bags of various sizes according to user needs.
Air-cushion films are distinguished between natural and colored. The production of natural color air cushion film directly uses film-grade low-density polyethylene as the raw material, and the melt flow rate ranges from 5-7 g / lOmin. If you want to produce a colored air cushion film, you need to add an appropriate colorant.
There are two production methods of air cushion film: one is extrusion compound method, and the other is blow molding method. The air-cushion film extrusion composite method uses an extruder to simultaneously extrude two layers of film, one of which is blistered on a vacuum roller to form a bubble and then thermally compounded with another layer of film. Form a double-layer composite air cushion film. If the foamed side of the double-layer product is further compounded with a film, it becomes a three-layer composite air cushion film. Extrusion compounding method is easy to foam, and has fast adhesion. In the blow molding method, before the blown film is cooled, it is vacuum-blended into a bubble by heating a forming roll, and then compounded with another film to form a double-layer air cushion film. The blow molding process has strict requirements and complex composite technology.