Production method of new type POF plastic film for environmental protection

The POF plastic film first appeared in Germany in the two World War, using PVDC, which was used to pack weapons after biaxial tension, to prevent rust. Therefore, POF plastic film was used in industrial packaging since the beginning of industrial production, and then gradually used for food packaging, for example: PVDC casing film for sausage packaging. POF plastic film is to use thin film in high elastic state under longitudinal or transverse stretching of the energy stored in the film, the use of thermoplastic plastics with has the bidirectional or unidirectional stretching of the shape memory effect, recovery before stretching form can meet again in the heat to achieve the function of packaging purpose.

Method for producing POF plastic film is the production of a cylindrical film or thick film flat thick resin particles into the extruder after blown film extrusion or extrusion casting, for crystalline polymers, in order to prevent and reduce the crystallinity, should use cooling water to quench cooling method of thick film, because the crystallization of the thick film is not bidirectional or uniaxial tension, tensile failure will make the crystal, reduce the mechanical strength and the performance of film.