The analysis of air-cushion film manufacturers conforms to the characteristics of the production method. The production process of air-cushion films is mostly produced by the extrusion composite method, that is, one extruder simultaneously extrudes two layers of film, one of which is formed into a robe on the vacuum roller and the other The film is thermally bonded. After traction and winding, it becomes a double-layer composite air cushion film, which is common in the market. If the double-sided product is laminated with a full-layer film, it becomes a three-layer composite air-cushion film. The extrusion compound method is easy to form foam and has high adhesion fastness. In addition, it can also be produced by blow molding method. Before the blown film is cooled, it is vacuum-blended into a robe by heating the forming rolls and then compounded with another film to form a robe. Double layer air cushion membrane. The blow molding process is strict, and the composite technology is more complicated, so it is less used.
Air cushion film manufacturers point out that the production process conditions of the extrusion compound method are mainly temperature and vacuum. The extrusion temperature is controlled in three stages, 140-150 ℃ in the back stage, 200-210 ℃ in the middle stage, and 210-230 ℃ in the front stage. The head and the connecting part are also controlled in three stages, the neck is 160-180 ℃, and the head is 160-170 ℃. The vacuum of the shaped blister should be 250-350 mmHg.