Back to results
US 5,296,303 AGranted
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
Life of this patent
Estimating the term…
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.
Claims6
A composite sheet capable of being used in laminated glasses, comprising:
- a) a flexible stretched support, and
- b) two layers of high optical quality on said support, one layer formed on one face of the support, being a thin layer resistant to scoring and abrasion, the other layer formed on the other face of the support, having energy-absorbing properties, said two layers being produced by a continuous process, which comprises:
- i) forming one of the two layers onto the flexible stretched support which is carried in a uniform horizontal movement,
- ii) turning over the support,
- iii) forming the second layer onto the second face of the flexible stretched support, and wherein the layer resistant to scoring an abrasion is formed by a high-speed centrifugal spraying of the mixture of reaction components from a bowl spray head, which components have been separately added thereto, the centrifugal spraying being performed with the bowl spray head revolving at a speed between 1,000-80,000 rpm and further wherein mixing of the reaction components is effected directly in the spray head.
2 more elements
A composite sheet capable of being used in laminated glasses, comprising:
- a) a flexible stretched support, and
- b) two layers of high optical quality on said support, one layer formed on one face of the support, being a thin layer resistant to scoring and abrasion, the other layer formed on the other face of the support, having energy-absorbing properties, said two layers being produced by a continuous process, which comprises:
- i) forming one of the two layers onto the flexible stretched support which is carried in a uniform horizontal movement,
- ii) turning over the support, and
- iii) forming the second layer onto the second face of the flexible stretched support, and wherein the layer resistant to scoring and abrasion is formed by a high-speed centrifugal spraying of the mixture of reaction components from a bowl spray head, which components have been separately added thereto, the centrifugal spraying being performed with the bowl spray head revolving at a speed between 1,000-80,000 rpm and further wherein mixing of the reaction components is effected directly in the spray head,
- provided that said flexible stretched support is made of ethylene glycol polyterephthalate.
3 more elements
A composite sheet capable of being used in laminated glasses, comprising:
- a) a flexible stretched support, and
- b) two layers of high optical quality on said support, one layer formed on one face of the support, being a thin layer resistant to scoring and abrasion, the other layer formed on the other face of the support, having energy-absorbing properties, said two layers being produced by a continuous process, which comprises:
- i) forming one of the two layers onto the flexible stretched support which is carried in a uniform horizontal movement,
- ii) turning over the support, and
- iii) forming the second layer onto the second face of the flexible stretched support, and wherein the layer resistant to scoring and abrasion is formed by a high-speed centrifugal spraying of the mixture of reaction components from a bowl spray head, which components have been separately added thereto, the centrifugal spraying being performed with the bowl spray head revolving at a speed between 1,000-80,000 rpm and further wherein mixing of the reaction components is effected directly in the spray head,
- provided that said flexible stretched support is made of polyester.
3 more elements
Dependencies are inferred from the claim text.