Process for producing a polarizing film

Details Process for producing a polarizing film Process for producing a polarizing film

1988-06-07

1991-02-12

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

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

8489, 264 78, 427163, B29C 5502, B29C 7102, G02B 530

Patent

active

049922181

ABSTRACT:
A polarizing film comprising a polyvinyl alcohol-type film and a dichroic dye, a metallic ion and boric acid incorporated therein, and a process for producing the same, which comprises adsorbing a dichroic dye on a polyvinyl alcohol-type film, stretching the film substantially in one direction, immersing the stretched film in an aqueous solution containing a metallic ion and boric acid.

REFERENCES:
patent: 4166871 (1979-09-01), Schuler
patent: 4466704 (1984-08-01), Schuler
patent: 4591512 (1986-05-01), Racich et al.
patent: 4802745 (1989-02-01), Okada
patent: 4803014 (1989-02-01), Okumura et al.

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