是一种膜。 热收缩膜用于各种产品的销售和运输，其主要作用是稳固、遮盖和保护产品。收缩膜必须具有较高的耐穿刺性，良好的收缩性和一定的收缩应力。在收缩过程中，薄膜不能产生孔洞。由于收缩膜经常适用于室外，因此需要加入UV抗紫外线剂。
It's a kind of membrane. Heat shrinkable film is used for the sale and transportation of various products. Its main function is to stabilize, cover and protect products. The shrinkage film must have high puncture resistance, good shrinkage and certain shrinkage stress. In the shrinkage process, the film can not produce holes. Because the shrinkage film is often used outdoors, UV anti-ultraviolet agent is needed.