Shrink film manufacturers that have been beating the market for a long time

Shrink film manufacturers' full entry into the environmental protection industry can provide the packaging industry with a second major development opportunity. Enterprises start early and are expected to obtain double ideal returns. At present, packaging waste is increasing day by day, recycling technology has been initially mature, and the state proposes to treat solid waste in the direction of reduction, harmlessness, and recycling. Investment in packaging waste recycling is not only feasible, but also Promote the development of the packaging industry. The rapid development of my country’s packaging industry has caused many environmental problems. PE foam film blowing machines, multilayer composite film blowing machines, color stripe film blowing machines, heat shrinkable film blowing machines, etc., meet the packaging requirements of various products on the market. , The quality of high-end blown film has won the favor of high-end commodity packaging. Nowadays, blown film machines are developing high-end technology, and blown films can also be used for many application technologies such as food preservation, taking the road of new POF film blowing machines. A special fresh-keeping film blown out by the film blowing machine uses advanced technology to make fruits and vegetables durable. Generally speaking, a lower density can improve the heat sealability of the film, while a higher density can increase the rigidity and impact of the film. Strength and tear strength, but its heat shrinkage is slightly reduced. This is mainly due to the higher crystalline melting point, which can be compensated by changing the inflation ratio or traction ratio. Experience has proved that the best resin density is 0.918～0.924. The melt index of the resin is small, the molecular weight is high, there are many entanglement points between the molecules, and the impact strength and shrinkage stress of the film are large. Generally, raw materials with a melt index (M1) of 0.3 to 1.0 are suitable. The melt index is best not to exceed 5, otherwise the shrinkage stress of the film will be significantly reduced, and the shrinkage in both vertical and horizontal directions will not be easily balanced. Specifically, according to the different packaging uses, the melt index can be divided into three categories: MIu003c0.6, suitable for shrink packaging of heavy goods and pallet goods; MI between 0.6 and 1, suitable for shrink packaging of light packaging ;MIu003e1.0, suitable for shrink packaging that does not require high strength and shrinkage. The film produced by the resin with a narrow molecular weight distribution by the shrink film manufacturer has a low shrink temperature; on the contrary, the shrink temperature is high. In addition, the degree of branching of the molecular chain greatly affects the stretching properties of the film. It is said that mixing a resin with a degree of culture of less than 10 (MI is 0.5 to 3.0) and a resin with a degree of branching of 10 to 30 can greatly improve the stretchability of the film. The degree of branching is greater than 10, which has little effect on improving the tensile properties. If the degree of branching is equal to 10, the tensile properties of the film at high temperatures are not ideal. Foreign countries have recently developed the use of plasma surface treatment technology to vapor-deposit inorganic oxide coatings such as SiOx and AlOx on PET, BOPP and other substrates to obtain packaging films with high barrier properties. The silicon-coated film is relatively stable to temperature and is suitable for high-temperature retort and sterilization food packaging. Degradable films, edible films and water-soluble films are all green packaging products developed in recent years around the world. Research on the use of natural macromolecular polymers such as lipids, proteins and sugars as packaging films has also flourished. For more related knowledge, please click: Shrink film manufacturers