The heat-shrinkable film is used for the sale and transportation of various products, and its main function is to stabilize, cover and protect the products. The shrinkage film must have high puncture resistance, good shrinkage and certain shrinkage stress. During the shrinkage process, the film can not produce holes. Because the shrink film is often suitable for outdoor use, UV anti-ultraviolet agent needs to be added.
PE polyethylene, which is transparent thermoplastic. There are three common types of PE, namely LDPE HDPE LLDPE. The monomers of the three kinds of polyethylene are the same. However, the process conditions used to synthesize these polyethylene are different. Therefore, three different types of polyethylene are produced, and the properties of the three materials are greatly different.
PE film is a kind of material with good toughness, which is not easy to be crushed by ordinary plastic crusher. Because the PE film is soft and tough, it is not easy to cut, and the high temperature of the tool at high speed will make LDPE melt and adhere to the blade. PE granulation can be directly put into the feeding port of the extruder in strips, and the PE film is pulled into the barrel by the shear force of the screw for heating, melting and extruding granulation. The first grade material recycled by PE can still be blown, used for non-food and drug packaging, and also widely used in the production of oxford leather and waterproof cloth, with a bright future.
PE heat shrinkable film is widely used for the whole package of alcohol, cans, mineral water, various drinks, cloth and other products. The product has good flexibility, strong impact resistance, tear resistance, and is not easy to damage, not afraid of moisture, and has a large shrinkage rate.
PVC shrinkage film, added with ingredients to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface facial mask is paint, the main component in the middle is PVC, and the bottom layer is back coating adhesive. It is a kind of synthetic material that is deeply loved, popular and widely used in the world today. Among the materials that can produce 3D surface facial mask, PVC is the most suitable material.
Due to the unique properties of PVC (rainproof, fire-resistant, anti-static, easy to form) and the characteristics of low input and high output of PVC, it is widely used in the building materials industry and packaging industry. Therefore, PVC film has the characteristics of high transparency, good gloss, high shrinkage.