The main performance of PE heat shrinkable film

The products of PE heat shrinkable film manufacturers can be seamlessly combined with beverage bottles of various shapes, and are not wrinkled and flat. Therefore, it is very important to test and control the heat shrinkability of PE heat shrinkable film. PE heat-shrinkable film is mainly designed by the principle of high-liquid molecular chain stretching direction. The physical principle is to specify the stretching direction when the ion is in a high elastic state. When the polymer is suddenly cooled to below the glass transition temperature and the molecular direction freezes, the packaging items The molecular motion stress relaxes and the molecules return to their original state and contract. The shrink film is designed using the principle of the stretching direction of the polymer molecular chain and is formed by quenching. After the polymer in a highly elastic state is stretched, the polymer is rapidly cooled to below the glass transition temperature, and the molecular direction is frozen. When heating in the process of packaging things, the thermal movement of the molecules causes stress relaxation, and the molecules return to their original state and shrink , This is the physical principle. With this performance, the heat-shrinkable film can be seamlessly combined with beverage bottle columns of various shapes, without wrinkles and flat. Therefore, it is very important to test and control the heat shrinkability of PE heat shrinkable film. Next: What are the characteristics of heat shrinkable film? Previous post: The performance of PE heat shrinkable film two