Method for manufacturing retardation film

Details Method for manufacturing retardation film Method for manufacturing retardation film

1992-03-05

1993-08-17

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 26, 264 406, 264 407, 264216, 264234, 2642884, 264345, 264204, B29C 7102

Patent

active

052366359

ABSTRACT:
A method for manufacturing a retardation film having a suitable retardation using a film casting method but without requiring any special heat-treating process. The post-drying process in the film casting method is divided into three or more chambers, and the tension applied to the film is controlled under the condition that the tension does not exceed a yield value determined based on the amount of solvent content and the temperature of the film in each of the chambers, so that stretch of the film is carried out under the above condition and, if necessary, under the condition that the solvent content is not more than 10%.

REFERENCES:
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patent: 2904841 (1959-09-01), Haugh
patent: 3197538 (1965-07-01), Capron et al.
patent: 3515780 (1970-06-01), O'Connell et al.
patent: 4614634 (1986-09-01), Weber et al.
patent: 4847033 (1989-07-01), Carroll, Jr.
patent: 4904425 (1990-02-01), Hebels et al.
patent: 5138474 (1992-08-01), Arakawa

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