What is the printing standard of PVC heat shrinkable film

What is the printing standard for PVC heat shrinkable film? Release time: 2019-12-06 　　 What is the printing standard for PVC heat shrinkable film: 　　 As a common packaging material, protective film is no longer everywhere in our lives. The reason is that there are countless types of protective film products, and the objects of use involve all walks of life. For people nowadays, the absence of protective film brings great inconvenience to industrial production, storage and transportation, and people's lives. When the heat shrinkable film is exposed to temperature, it automatically shrinks, tightly wraps the product, and then achieves the effect of maintaining the product, and also has the effects of moisture, mildew, rust, pollution, breakage and theft prevention. The product has good storage and transportation stability, and the packaging technology and equipment are relatively simple, which facilitates the implementation of automated heat shrink packaging. Nowadays, the prevailing packaging is mainly based on plastic and paper, and the blow molding industry, which is based on plastic film blowing machines, has a larger proportion. However, as the requirements for the paper industry become more and more stringent, the new goal of environmental protection and energy saving has been improved The threshold of the paper industry has caused the cost of paper packaging to expand. This makes the proportion of heat shrinkable film plastic packaging increase accordingly, and the development of the film blowing machine manufacturing machinery industry. The melting temperature of PVC heat shrinkable film is a very important process parameter during processing. If this parameter is not appropriate, it will cause material decomposition. The flow characteristics of PVC are quite poor, and its process range is very narrow. Especially the high molecular weight PVC material is difficult to process (this kind of material usually needs to add lubricant to improve the flow characteristics), so the PVC material with small molecular weight is usually used. The shrinkage rate of PVC is quite low, generally 0.2~0.6. Polyethylene film is generally made by blow molding and casting processes. The thickness of cast polyethylene film is uniform, but due to its high level, it is rarely used at present. The blown polyethylene film is blown by blow molding grade PE particles through a blow molding machine. The cost is low, so it is widely used. Polyethylene film is a translucent, shiny, soft film, with excellent chemical stability, heat sealability, water resistance and moisture resistance, freezing resistance, and boiling. Its main disadvantage is its poor barrier to oxygen. It is often used as the inner film of composite flexible packaging materials. It is also a kind of plastic packaging film that is widely used and used in large quantities, accounting for about 40% of the consumption of plastic packaging film. the above. Previous: Wuhan direct sales heat shrinkable film label manufacturers offer discounts and welcome cooperation