利用口模拉伸工艺制备的取向聚乙烯的力学性能具有高度热敏感性，材料的热收缩率很高，且收缩时具有一定的收缩力。
The mechanical properties of such oriented PE were rather sensitive to the process temperature, and the thermal shrinkage of the material was also high.
根据由冰模所翻制铸件的尺寸对铸件收缩率进行了研究。
Some researches on the shrinkage percentage of the casting have been done according to the dimension of the castings made from the ice patterns.
高模低收缩型、高强低收缩型涤纶丝沸水收缩率和干热收缩率均低于高强型涤纶丝；
The boiling water shrinkage and dry-heat shrinkage rate of HT are also the greatest among the three types of industrial PET filaments.
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