Shrinkable film is a kind of packaging material, its encounter heat (can use hair dryer, water and other heat source) contraction and clingy packaging, good transparency, shrinkage rate is big, is mainly used in daily necessities, cosmetics, chemical, pharmaceutical, food, beverages, building materials, books, toys, gifts, shoes, disinfection tableware, office accessories, craft gifts, printed matter, hardware plastic products, telephone, electronic appliances, etc. Various kinds of product packaging, especially in irregular shape goods or goods of composite packaging, can meet the commodity moistureproof and dustproof, touch the sameness, transparent display, and other functions, and can increase the product appearance attraction, Can also be used to replace all kinds of carton, not only save packaging costs, but also in line with the packaging trend