Comparison of heat shrinkage of polyethylene terephthalate filaments

摘要

This paper provides a detailed comparison of shrinkages in boiling water and in the hot air of the PET filaments under different conditions. When the temperature of the top godet is fixed, the shrinkages of two different kinds of filaments decreased with the increase of the temperature of the plate. The shrinkage in the boiling water compared with that in hot air shows a very complex relationship between the heat treatment conditions. These results can be explained by the change of the Tg (glass transition temperature).