Processing technology of biaxial stretching polyolefin shrinking film

Abstract

The invention discloses a processing technology of a biaxial stretching polyolefin shrinking film. The biaxial stretching polyolefin shrinking film is mainly prepared from the following raw materialsin parts by weight: 35 to 50 percent of LLDPE (linear low density polyethylene), 20 to 40 percent of TPP (ternary copolymerized polypropylene), 15 to 35 percent of PPC (binary copolymerized polypropylene), 5 to 10 percent of necessary functional auxiliary agent, i.e., a smoothening agent, 10 to 20 percent of anti-blocking agent, 5 to 15 percent of antistatic agent and the like. The biaxial stretching polyolefin shrinking film provided by the invention has a good effect when being used for packaging an irregular product, reaches international environmental protection standards and accords withAmerican and European environmental protection quality standard systems; the good effect is obvious when the shrinking film is sealed and an opening is not easy to break while the shrinking film is shrunk; the biaxial stretching polyolefin shrinking film has a compact molecular structure, is not easy to abrade on the surface of a packaged product and is not easy to impale; the biaxial stretching polyolefin shrinking film has high toughness strength and is applicable to packaging of products in various industries.

Description

technical field [0001] The invention relates to the technical field of shrink film technology, in particular to a processing technology of biaxially stretched polyolefin shrink film. Background technique [0002] Biaxially oriented polyolefin shrink film has a wide range of uses, a broad market, and has the advantages of environmental protection and non-toxicity. Therefore, it has been widely valued by developed countries in the world. It has basically replaced PVC heat shrinkable packaging film and become the mainstream product in heat shrinkable packaging materials. The production of this series of products in my country began in the mid-1990s. At present, there are more than ten production lines in China, all of which are imported equipment, with a total production capacity of about 20,000 tons. Due to the gap between my country's packaging technology and international developed countries, the domestic application of three-layer co-extrusion series heat shrinkable packagi...

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Problems solved by technology

[0003] At present, there are still some deficiencies in the existing shrink film, for example, the existing shrink film has a general effect when packaging irregular products, and cannot meet the international environmental protection standards, and the existing shrink film is not obvious when sealing. , it is easy to burst when shrinking, the molecular structure is relatively loose, the surface of the product is easily worn and pierced after packaging, and the toughness and strength are relatively low.

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