Polyethylene terephthalate film

Details Polyethylene terephthalate film Polyethylene terephthalate film

1975-06-30

1978-02-07

Lee, Lester L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

260 75T, 264289, 428430, 428441, 428446, 428483, C08G 6370, C08G 6318

Patent

active

040727793

ABSTRACT:
An asymmetrically oriented, heat set, polymeric film is provided for use in laminated structures, such film having many desired mechanical and thermal properties, such as good dimensional and thermal stability and being frangible and further having improved optical properties, being substantially clear and haze free and free of distortion and being substantially free of color fringes upon viewing in partially polarized light. This film is particularly useful in glazing structures.
For glazing applications, a two-ply laminated structure is provided comprising this specific film bonded to a layer of polyvinyl butyral or other tough elastomeric film; and, further provided is a three-ply laminated structure consisting of this two-ply laminated structure coated on its other surface with an abrasion-resistant material.
The film finds a preferred use in a laminated structure comprising: ##EQU1##

REFERENCES:
patent: 2823421 (1958-02-01), Scarlett
patent: 2968065 (1961-01-01), Gronholtz
patent: 2975484 (1961-03-01), Amborski
patent: 2995779 (1961-08-01), Winter
patent: 3165499 (1965-01-01), Alles
patent: 3282722 (1966-11-01), Hailstone
patent: 3627579 (1971-12-01), Heffelfinger
patent: 3734994 (1973-05-01), Blecha
patent: 3786127 (1974-01-01), Peet et al.
patent: 3807004 (1974-04-01), Andersen
patent: 3869533 (1975-03-01), Janocha et al.

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