Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1993-06-09
1994-03-08
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264544, 264320, 2642106, 428480, 156243, 15624419, B29C 4706, B32B 700, B32B 2736
Patent
active
052924718
ABSTRACT:
A polyester film, which is substantially non-oriented and whose main component is polyethylene terephthalate, is formed into a 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.
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Aoki Seizo
Ito Tatsuya
Kurome Hirokazu
Tsunashima Kenji
Yamauchi Hideyuki
Miller Austin R.
Silbaugh Jan H.
Toray Industries Inc.
Vargot Mathieu
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