SHRINKABLE POLYETHYLENE TEREPHTHALATE FILM

摘要

The present invention relates to a polyethylene terephthalate film stretched biaxially according to the stenter stretching process of longitudinally and multiaxially at the circumference according to the tube stretching process. The film has an improved shrinkage and, simultaneously, an earlier shrinkage start, compared to films of the prior art. More specifically, this invention relates to a stretched shrinkable film of polyethylene terephthalate containing about 2 to 35 per cent by weight of polybutylene terephthalate.