Production process of PVC film

The production process of PVC film release time: 2019-11-30 The production process of 　　 PVC heat shrinkable film is not complicated. The ordinary production line is generally composed of a rolling machine, a printing machine, a back coating machine and a cutting machine, mainly through a rolling machine The direct-acting stirring, roller rotation and high-temperature rolling produce a film with a thickness of only 0.3 mm to 0.7 mm. At the same time, the pattern is printed on the front side of the film by a printer and attached to the back of the film by a back coater. One layer of back coating. Don't underestimate this back coating, it is an important guarantee for the high-quality performance of the PVC film. The back coating is composed of special materials and is a kind of high-energy affinity agent. It is precisely because of this back coating that the pvc film can be tightly integrated with the medium-density board or other boards, and it will not be glued for ten or fifteen years. The biggest problem with ordinary face masks is that they cannot solve the problem of film shedding. Since the whole production process is carried out at high temperature (the temperature in the roller press reaches 220 degrees), this makes the PVC film have high light resistance and fire resistance, and ensures the high quality of the PVC film. Of course, this requires very high production machines. Usually, the cost of a production line is about 39 million marks, which is equivalent to about 160 million yuan. But on the other hand, the production process of PVC film is quite simple, and the output of the machine is also very large, so in a comprehensive view, PVC film is actually a low-input, high-yield product.　　 Nowadays, shrink film technology has been developed so that every product is packaged with it. The protective performance of pvc shrink film packaging: During the production process, the pvc shrink film is stretched directionally, and the shrink film is subjected to heat shrinkage during use. The heat shrinkability of the film has been used as early as 1936, and rubber film was mainly used to shrink packaging perishable foods. In addition, shrink packaging is also used to make shrink labels and shrink bottle caps, so that containers that are not easy to print or have complex shapes can be labeled. And there are constantly updated application areas being developed. PVC shrink film is suitable for the packaging needs of products in various industries. It can be packaged in single or small collections, or in large pallets. It can be used for stationery, toys, textiles, paper products, beverages, medicine, and enterprises. Heat-shrinkable packaging for flooring, hardware and electrical appliances.　　 In addition to traditional paper, plastic, glass, and metal packaging, packaging materials began to explore the use of new materials to make packaging, and plant materials began to enter the market. Consumers are fickle creatures. Its buying habits have been elusive. Even if it looks like a big trend in the future, it may be uninterested in a few weeks. This kind of personal preference makes specifying long-term product planning a guessing game; consumer likes and dislikes are too difficult to predict. Features of PVC heat shrinkable film 1. The product has a smooth appearance, uniform thickness, no obvious spots, no oil stains, impurities, and folds; 　　 2. High heat shrinkage rate, horizontal shrinkage rate 48±3%, longitudinal 12±3% tightness To stick the product, it can be shrunk by a heat shrink machine, or it can be shrunk with a hair dryer or boiling water; 　　3, the flexibility is good, after the package is shrunk, it is dropped from a height of 1 meter from a height of 1 meter to the concrete floor three times without cracking; 　　4, After the packaging is shrunk, store it at 30°C without any color changes such as fading and discoloration. Previous: Hubei low price and good quality heat shrinkable film label manufacturers take the interests of customers first