B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 7/01 (2006.01) B32B 27/08 (2006.01) B32B 27/36 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2057541
ABSTRACT OF THE DISCLOSURE A polyester film, which is substantially non-oriented and whose main component is polyethylene terephthalate, is formed as a some shape, for example, a package, at a condition causing no yield point. The formation ability of the polyester film for forming is improved, and a formed body having a good uniformity in thickness can be obtained. Further, the range of the temperature condition causing no yield point can be enlarged by laminating a PET-system polyester, which originally tends to cause a yield point by itself, onto a polyester having no yield point. In such a laminated polyester film, the slipping property and releasing property from a mold of the film can be improved by specifying the ranges of the degree of crystallinity of each layer, the adhesive force at a high temperature of the film and the surface roughness of the film, and the shape of a formed body can be improved.
Aoki Seizo
Ito Tatsuya
Kurome Hirokazu
Tsunashima Kenji
Yamauchi Hideyuki
Smart & Biggar
Toray Industries Inc.
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