Method and device for the manufacture of a high optical quality

Details Method and device for the manufacture of a high optical quality Method and device for the manufacture of a high optical quality

1987-06-24

1989-05-16

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

264236, 26433119, 264338, 425224, 425445, B29C 4128, B29C 7102, C08G 1808

Patent

active

048308064

ABSTRACT:
The invention is directed to the method, products and apparatus for the manufacture of a high optical quality sheet of plastic comprising a polyurethane layer having energy-absorbing properties obtained by reactive pouring or reactive pulverization of the reaction components.
In accordance with the invention, the polyurethane layer is treated, while it is in a state of ongoing polymerization corresponding to an NCO/CH ratio of less than 0.7, with water in a liquid or vapor form and then subsequently, after rolling with an interpolated film, stocking and unrolling, the layer is subjected to heat treatment.

REFERENCES:
patent: Re32224 (1986-08-01), Schafer et al.
patent: 2431042 (1947-11-01), Ingersoll
patent: 2510967 (1950-06-01), Flanagan
patent: 2850467 (1958-09-01), Livingood
patent: 2926104 (1960-02-01), Goetz
patent: 3979548 (1976-09-01), Schafer et al.
patent: 4232080 (1980-11-01), Orain et al.
patent: 4331736 (1982-05-01), Schafer et al.
patent: 4605528 (1986-08-01), Petitcollin et al.
The American Heritage Dictionary, Second College Edition, Boston, Houghton Mifflin Co., 1982, p. 671.

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