Process and device for producing a plastic layer of high optical quality
AssigneeSaint-Gobain Vitrage
InventorsJean-Louis Bravet, Francois de Toytot, Gerd Leyens, Siegfried Pikhardt, Herbert Bayer
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Abstract
A process for the continuous production of a plastic sheet of high optical quality capable of being used in laminated glasses, having at least a thin layer resistant to scoring and abrasion which entails high-speed centrifugal spraying of a mixture of reaction components, onto a plane horizontal support carried in a uniform movement of advancement relative to the spraying.
Claims17
A process for the continuous production of a plastic sheet of high optical qualtiy capable of being used in laminated glasses, having a first thin layer resistant to scoring abrasion, and a second layer formed thereon having energy-absorbing properties, which comprises:
- (a) high-speed centrifugal spraying a mixture of reaction components from a bowl spray head, which components have been separately added thereto, onto a plane horizontal support which is carried in a uniform movement of advancement relative to the spraying, in order to form said first layer, and wherein the centrifugal spraying is performed with said bowl spray head revolving at a speed between 1,000 and 80,000 rpm and further wherein mixing of the reaction components is effected directly in the spray head, and
- (b) forming on said first layer, said second layer by reactive casting.
The process as in claim 10, wherein the polyurethane layer is thermosetting polyurethane layer.
Dependencies are inferred from the claim text.