Polymer sheet for projection screen
AssigneeStewart Filmscreen Corporation
InventorGary Allan Browning
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Abstract
A polymer sheet for use in a projection screen comprises polyorgano silsesquioxane microspheres that enhance light diffusing characteristics. Also disclosed is a projection screen comprising at least two glass plates and the polymer sheet disposed therebetween. Also disclosed is a method of manufacturing a polymer sheet by incorporating the microspheres with the polymer.
Claims20
A polymer sheet comprising from about 85% to about 99.5% by weight of a thermoplastic polymer compound selected from the group consisting of polyvinyl butyral, polyurethane, polyvinyl chloride, and poly (ethylene vinyl acetate), and combinations thereof, and from about 0.5% to about 15% by weight of dispersed polyorgano silsesquioxane microspheres.
A rear projection screen comprising:
- a) a first glass plate;
- b) a second glass plate;
- and
- c) a polymer sheet layer disposed between the first glass plate and the second glass plate, said polymer sheet comprising from about 85% to about 99.5% by weight of a thermoplastic polymer compound selected from the group consisting of polyvinyl butyral, polyurethane, polyvinyl chloride, and poly (ethylene vinyl acetate), and combinations thereof, and from about 0.5% to about 15% by weight of dispersed polyorgano silsesquioxane microspheres.
A rear projection screen comprising:
- a) a first glass plate;
- b) a second glass plate;
- and
- c) a polymer sheet layer disposed between the first glass plate and the second glass plate,
- said polymer sheet comprising from about 85% to about 99.5% by weight of a polyvinyl butyral compound and from about 0.5% to about 15% by weight of dispersed polymethyl silsesquioxane microspheres.
Dependencies are inferred from the claim text.