Device for producing a plastic sheet of high optical quality

Details Device for producing a plastic sheet of high optical quality Device for producing a plastic sheet of high optical quality

1988-11-14

1990-05-15

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

With means applying coating material to work or work contact...

Means contacting work downstream of shaping member

264171, 26421112, 425101, 425104, 425112, 425327, 425363, 4253781, 425397, 425445, B29C 4706, B29C 4788, B32B 3120

Patent

active

049253794

ABSTRACT:
A process and a device for producing a plastic sheet of high optical quality and including at least one layer having a base of a polyurethane exhibiting energy-absorbing properties. The polyurethane layer is obtained by extrusion followed immediately after by a finishing by a pressing at a temperature higher than the temperature of the softening point of the polyurethane layer. The finishing imparts to the sheet optical quality making it suitable for use in the production of laminated glazings.

REFERENCES:
patent: 2574588 (1951-11-01), Piperoux et al.
patent: 3232780 (1966-02-01), Kupits
patent: 3756760 (1973-09-01), McBride
patent: 4035549 (1977-07-01), Kennar
patent: 4368024 (1983-01-01), Asano
patent: 4826560 (1989-05-01), Held

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