Hard-backed lampshade

Details Hard-backed lampshade Hard-backed lampshade

F - Mech Eng,Light,Heat,Weapons

21

V

F21V 1/12 (2006.01) F21V 1/22 (2006.01) F21V 1/26 (2006.01) F21V 7/22 (2006.01)

Patent

CA 2250670

A lampshade includes a self supporting backing member constituted of an extruded oriented polystyrene and an additive including a light-reflecting powdered filler, especially titanium dioxide, co-extruded with the oriented polystyrene and weighing in the range of 1 % - 10 % of the total weight of the polystyrene. A fire-retarding filler, for example, antimony oxide, is also co-extruded.

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