Heat shrink film is a plastic material widely used in packaging, labeling, printing and decoration. In the heat shrink film market, POF heat shrink film and PVC heat shrink film both occupy a certain market share. However, there are differences in the production processes of these two types of heat shrink films.

Ultra Thin POF Shrink Film-1

Three major factors affecting shrink film production process

The choice of material is one of the important factors

POF heat shrink film is made of polypropylene (PP) material, with high transparency, high strength, high flexibility and high heat resistance, and also has good processability and environmental protection. PVC heat shrink film, on the other hand, is made of polyvinyl chloride (PVC) material, which has high transparency and gloss, and also has excellent tear resistance and waterproof performance. However, PVC materials have certain environmental problems and may be harmful to the human body, so they need to be carefully selected and handled when used.

The processing method will also affect the quality and performance

For POF heat shrink film, it is manufactured by co-extrusion die stretching method or by extruding film and stretching film in two steps. The preparation process includes extrusion of the material column, stretching die stretching and heat treatment. While the preparation of PVC heat shrink film is mainly through the extrusion and extension of two steps, need to use a specialized extruder, hot air oven and other equipment for processing.

The requirements of the equipment is also an important factor

POF heat shrink film production equipment needs to have an extruder, molding machine, stretching machine and other equipment, while the PVC heat shrink film needs a special extruder and extension machine and other equipment. The precision level and automation degree of these equipments need to meet certain requirements to ensure the quality and stability of the product.

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In summary, POF heat shrink film and PVC heat shrink film, although there are differences in materials and production processes, but both have their own advantages and application areas. Therefore, in the production and use of the need to pay attention to the selection of appropriate materials and equipment to ensure product quality and environmental protection.