热收缩膜的分类

Classification of heat shrinkable membranes

热收缩膜大体上可以分为两类，阻隔收缩膜和非阻隔收缩膜。两个大的分类下又有若干小的分类。下面先给大家简单介绍一下每种收缩膜的特点。薄膜通会根据需要，另辟文章专门详细介绍。

Heat shrinkable membranes can be broadly divided into two categories: barrier shrink membranes and non barrier shrink membranes. There are several small classifications under the two major classifications. Here we first give you a brief description of each of the characteristics of shrink film. The membrane will be specially described in detail as required.

阻隔收缩膜大都是含有阻隔材料（EVOH、PVDC）的5~9层共挤结构，利用三泡法吹膜工艺生产得到的。一般都是应用在对氧气阻隔性有一定要求的肉类或者生鲜食品包装上。这一类收缩膜市场专一，但生产技术难度大，因此附加值高。

Most of the barrier shrinkage films are 5~9 layer coextrusion structures containing barrier materials (EVOH and PVDC), which are produced by three blister process. Are generally used in the oxygen barrier property requirements of meat or fresh food packaging. This kind of contraction membrane market is single-minded, but the production technology is difficult, so the added value is high.

非阻隔收缩膜具有很多的分类。按照原料和工艺的不同，大体上分为四类（PVC收缩膜、PE收缩膜、POF收缩膜、其他收缩膜）。

Non barrier shrink membranes have many classifications. According to the differences of materials and processes, they are divided into four kinds (PVC shrink film, PE shrink film, POF shrink film, and other shrinkage film).