The working principle of the heat shrinkable tube: the polymer material is in a glass state at low temperature, and is in a high elastic state after heating. During production, the heat shrinkable tube is heated to a high elastic state, a load is applied to expand it, and it is rapidly cooled while maintaining the expansion to enter a glass state, and this state is fixed. When applied, the heat-shrinkable tube will return to a high elastic state when heated again. When there is no external load, it will shrink rapidly, and after cooling, it will be fixed in a glass state.
Heat shrink tube processing tools, heat processing using oven, heat gun or semi-automatic heating equipment. When using a hot air gun, it is best to control the distance between the heat shrinkable tube and the air gun mouth at 20~40 mm. In order to improve the processing quality and work efficiency, semi-automatic equipment processing has been widely used.