Heat shrinkable sleeve is a kind of heat shrinkable packaging material, which shrinks when heated. According to the material, it can be divided into pvc heat shrinkable sleeve, pet heat shrinkable sleeve, irradiation cross-linked pe heat shrinkable sleeve, 10KV high voltage busbar protection Heat shrinkable sleeve, 35KV high voltage busbar protection heat shrinkable sleeve, double-walled heat shrinkable sleeve with glue, imitation wood grain heat shrinkable sleeve.