Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1992-04-02
1993-12-07
Kight, III, John
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
2642884, 2642902, 528272, 528502, 528503, B29C 4908
Patent
active
052681351
ABSTRACT:
A biaxial oriented polyester film of the present invention has a density of 1.386 g/cm.sup.3 or more. A sum Y of the coefficients of the heat shrinkage in the machine direction and in the transverse direction of the film at a temperature of 150.degree. C. is 4.5% or more, and a sum X (kg/mm.sup.2) of F.sub.5 values in the machine direction and in the transverse direction of the film and the sum Y satisfy the following expression (I):
REFERENCES:
patent: 4876137 (1989-10-01), Utsumi
patent: 4960636 (1990-10-01), Tomitaka et al.
Baba Yutaka
Sasaki Yasushi
Suzuki Toshitake
Acquah S. A.
Kight III John
Nippon Magphane Co. Ltd.
Toyo Boseki Kabushiki Kaisha
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