Shenzhen POE shrink film has many classifications

Shenzhen POE shrink film has a variety of categories, including POF heat shrink film, PVC shrink film, PE shrink film, etc. Different types of shrink film have different characteristics, which are reflected in the following three points: 1. PE shrink film: excellent It has the characteristics of flexibility, tear resistance, large shrinkage rate, etc., suitable for alcohol, mineral water, various beverages and so on. 2. PVC film: has the characteristics of good transparency and good gloss. 3. POF heat shrinkable film: is a packaging film with high surface gloss, good flexibility, low carbon and environmental protection, and wide applicability. With the POF heat shrinkable film process The application of POF heat shrinkable film has gradually replaced other films and has become a mainstream packaging film. It can be seen that POF heat shrinkable film has gradually become a mainstream packaging form, replacing similar films, and is widely used in various packaging fields, providing convenience for people's lives and having important influential significance. The environmentally friendly multi-layer co-extruded polyolefin POF shrink film uses linear low-density polyethylene (LLDPE) as the middle layer and co-polypropylene (PP) as the inner and outer layers in a special equipment. The inner, middle and outer layers are separated by a special process. The three layers are co-extruded to produce a heat-shrinkable film with high transparency, high shrinkage and good heat sealing performance. The shrinkage temperature of POF shrink film is generally between 140-180. The setting of the temperature difference depends on the shrinking furnace itself. There is a process for the product to enter the heat shrinkage. Generally, it is heated first, then shrinks, and there is a cooling time when it comes out. Therefore, the choice of shrinking furnace is the key. For shrinking films of different materials, shrinking furnaces with different functions can be selected. POF environmental heat shrinking The film is best to choose a constant temperature shrinking furnace with a temperature cycle in the furnace, so as to avoid uneven heating of the product during the shrinking process and affecting the shrinking effect. Introduction to the advantages of POF shrink film, stable friction coefficient, suitable for high-speed packaging machines. Secondly, the ratio of film layers is uniform, and the sealing strength is high. Also, the thickness is uniform, and the shrinkage rate is as high as 65%. It can be used for various heterogeneous packaging shrinkage rates including longitudinal and transverse. The test method is to measure the film length L1, and then immerse the film in glycerin at 120°C for 1 to 2 seconds. After taking it out, cool it with cold water, and then measure the length L2 where Ll is the length of the film before shrinking; L2 is the length of the film after shrinking. At present, the shrink film used for packaging generally requires the same shrinkage in both longitudinal and transverse directions, about 50%; but in special cases, there are also unidirectional shrinkage, with a shrinkage rate of about 25% to 50%. There are also partially stretched films with unequal shrinkage rates in the longitudinal and transverse directions. The ratio of the shrinkage rate in the vertical and horizontal directions is called the shrinkage ratio.