申请人:Toray Industries, Inc.
公开号:EP2336243A1
公开(公告)日:2011-06-22
The objective of the invention is to solve the problems described above. Specifically, the invention aims to provide highly heat resistant and dimensionally stable polyester film that is so high in formability as to maintain a low stress and a high ductility during forming processes.
The invention provides a polyester film comprising ethylene glycol component that accounts for 60 mol% or more of the glycol components in the polyester film, containing a crystal nucleating agent up to 0.01 to 5 mass% relative to the entire polyester film that accounts for 100 mass%, and having a crystal melting energy, ΔHm, of 5 to 35 J/g.
本发明的目的是解决上述问题。具体来说,本发明旨在提供高耐热性和尺寸稳定性的聚酯薄膜,这种薄膜具有很高的成型性,在成型过程中可以保持低应力和高延展性。
本发明提供了一种聚酯薄膜,它包含乙二醇成分,乙二醇成分占聚酯薄膜中乙二醇成分的 60 摩尔%或更多,相对于占整个聚酯薄膜 100 质量%的乙二醇成分,它含有 0.01 至 5 质量%的晶体成核剂,晶体熔化能 ΔHm 为 5 至 35 焦耳/克。