The heat shrinkable film is designed based on the tensile orientation principle of highly oriented molecular chain and formed by rapid cooling. Generally speaking, heat shrinkable film is POF or polyolefin shrink film, which can package products with regular and irregular shapes. The heat shrinkable film is designed based on the tensile orientation principle of highly oriented molecular chain and formed by rapid cooling. Its physical principle is: when the ionomer is in a high elastic state, it will be stretched and oriented, and then the polymer will be quenched below the glass transition temperature, and the molecular orientation will be frozen. When it is heated during the packaging process, due to the stress relaxation caused by the molecular movement, the molecules will return to the original state and shrink. Generally speaking, heat shrinkable film is POF or polyolefin shrink film, which can package products with regular and irregular shapes. Such as: automotive products, plastic products, stationery, books, electronics, circuit boards, MP3, VCD, handicrafts, photo frames and other wood products, toys, pesticides, daily necessities, food, cosmetics, canned drinks, dairy products, medicine, cassettes and videotapes. The application potential in the following fields is quite huge.
1) Hardware - such as mechanical parts, small machinery, tools, etc;
2) Other products such as medicine, food, tobacco and alcohol, ceramics, paper, glass products, etc.
3) Cultural and educational supplies - books, photo albums, pens, inkstones, etc.
4) Handicrafts - gypsum statues, vases, stone carving handicrafts, etc;
5) Communication equipment - such as telephone, fax machine, etc;
6) Electrical appliances - dry batteries, batteries, instruments, switches, electronic components, etc;
In addition to being directly used for packaging, POF heat shrinkable film can also be used for printing after corona treatment, so as to meet the high packaging requirements of commodities. In addition, the new field and scope of packaging are constantly expanding with the practice of market development and consumption.
