What are the types of heat shrinkable film?
PE shrink film
PE polyethylene, it is a transparent thermoplastic. There are three types of PE commonly used, namely: LDPE, HDPE, LLDPE. The monomers of the three polyethylenes are the same, but the process conditions used in the synthesis of these polyethylenes are different. Therefore, three different polyethylenes are produced. The properties of the three materials are quite different.
PE film is a material with good toughness, and it is not easy to be crushed by ordinary plastic crushers. Because the PE film is soft and tough, it is not easy to be chopped, not to mention the high temperature of the tool at high speed, which will melt the LDPE and adhere to the blade. The granulation of PE can be directly put into the feeding port of the extruder, and the PE film is dragged into the barrel by the shear force of the screw to heat, melt, extrude and granulate. The primary material recovered from PE can still be blown film, used for non-food and pharmaceutical packaging, and is also widely used in the production of oxford leather and tarpaulins, and has a bright future.
PE heat shrinkable film is widely used in the whole package packaging of wine, cans, mineral water, various beverages, cloth and other products. Tide, shrinkage rate is large.
PVC shrink film with additional ingredients to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is a back coating adhesive. It is a well-loved, popular and widely used synthetic material in the world today. Among the materials that can produce three-dimensional surface films, PVC is the most suitable material.
Due to the unique properties of PVC (rainproof, fire resistance, antistatic, easy to form) and the characteristics of low input and high output of PVC, it is widely used in building materials industry and packaging industry. Therefore, PVC film has high transparency, good gloss and shrinkage. High rate features.