This article expounds the down-blow bubble film technology for the PVC shrinkable film with the main two parts of manufacturing principle and molding technology.

• 从生产原理角度看,一次成型工艺的实现,对用吹塑法生产PVC热收缩膜的生产原理予以了深化,简化了工艺流程,且操作控制相对简易。