High barrier shrink film and packaging bag is a kind of packaging material widely used in food, beverage, daily chemical products and other fields. The high barrier shrinkage film has excellent barrier and shrinkage properties, which can effectively protect the quality of products and extend the shelf life. In terms of packaging bags, the high barrier shrink film can be made into bags of various shapes and sizes, which is convenient for packaging and carrying of products.

The production of high barrier shrink film is mainly achieved by co-extrusion, stretching, coating and other processes. The co-extrusion method is to heat and melt a variety of materials through the extruder and then extrusion into a film through the die head, and then through cooling, stretching and other processes for post-treatment; The tensile law is to stretch the prefabricated film at a certain temperature and tensile speed, so that it forms a certain crystalline structure during the stretching process, and improve the barrier property of the film; The coating method is to evenly coat the coating material with high barrier properties on the substrate through the coating machine to form a high barrier shrink film.

In the production process of high barrier shrink film, it is necessary to pay attention to the control of temperature, speed and tensile ratio and other parameters to ensure the quality and performance of the film. At the same time, it is also necessary to choose a suitable combination of materials, such as polyvinyl alcohol (PVOH), polyethylene (PE), polyvinyl chloride (PVC), etc., to meet the packaging needs of different products.

The main feature of the high barrier shrinkage film is that it has high oxygen, water vapor and aroma barrier properties, which can effectively protect the product from external pollution and oxidation. At the same time, in terms of packaging bags, the high barrier shrink film can achieve rapid shrinkage, so that the bag is more closely wrapped in the product, and improve the aesthetics and quality of the packaging.

High barrier shrink film and packaging bag are widely used in food, beverage, daily chemical products and other fields. In the field of food, high barrier shrink film can be used to package meat, seafood, cooked food and other perishable foods, effectively extend the shelf life of products; In the beverage field, high barrier shrink film can be used to package juice, dairy products and other easily oxidized drinks, to maintain the fresh taste of products; In the field of daily chemical products, high barrier shrink film can be used to package volatile cosmetics such as shampoo and body wash, effectively preventing volatilization and leakage of products.

In short, high barrier shrink film and packaging bag is a kind of high-quality packaging materials, with excellent barrier properties and shrink properties, in food, beverage, daily chemical products and other fields play an important role. With the continuous improvement of consumer requirements for product quality and packaging, high barrier shrink film and packaging bags will have a broader market prospect.