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US 4,064,314 AGranted
Weather-resistant transparent composite film
AssigneeMinnesota Mining and Manufacturing Company
InventorEugene L. McKenzie
Life of this patent
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Abstract
A composite film structure which is useful as an inexpensive, nonbrittle, outdoor-facing window pane in greenhouses and similar structures, comprises an oriented support film laminated to a weather-resistant oriented film of polymethylmethacrylate.
Claims8
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising
- a. a continuous transparent high-tensile-strength oriented polymeric support film comprising a linear oriented crystalline heat-set polyester polymer;
- b. a continuous transparent weather-resistant oriented polymethylmethacrylate film;
- and
- c. a transparent adhesive layer disposed between said support and weather-resistant films to laminate the films together.
1 more element
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising
- a. a continuous transparent high-tensile-strength oriented polyethylene terephthalate film;
- b. a continuous transparent weather-resistant oriented polymethylmethacrylate film;
- and
- c. a transparent adhesive layer comprising an adhesive polymer based on an ester of acrylic acid disposed between said support and weather-resistant films to laminate the films together.
1 more element
Dependencies are inferred from the claim text.