Process for the production of plastic films having improved opti

Details Process for the production of plastic films having improved opti Process for the production of plastic films having improved opti

1984-12-18

1986-09-30

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

Solvent polishing type

264 13, 264 26, 264343, B29C 7100

Patent

active

046146342

ABSTRACT:
An optically virtually isotropic plastic film, in particular for use in liquid crystal displays, can be produced by a method in which first an optically uniaxial birefringent plastic film is produced by casting or extrusion, and then irreversible molecular reorientation is produced in layers of the film close to the surface by heating or by immersion in a solvent or swelling agent. This reoriented structure is retained after cooling or drying of the film, and results in the birefringence (anisotropy) initially present being eliminated or compensated.

REFERENCES:
patent: 2317409 (1943-04-01), Seaton
patent: 2332674 (1943-10-01), Smith
patent: 2659105 (1953-11-01), Halbig et al.
patent: 2664025 (1953-12-01), Herman
patent: 2897546 (1959-08-01), Clapp et al.
patent: 3200182 (1965-08-01), Hechelhammer et al.
patent: 3327033 (1967-06-01), Koch et al.
patent: 3541200 (1970-11-01), Niegisch
patent: 3546332 (1970-12-01), Merriam et al.
patent: 3547748 (1970-12-01), D'Onofrio et al.
patent: 3555135 (1971-01-01), Paul
patent: 3970362 (1976-07-01), Laliberte
patent: 4133912 (1979-01-01), Stuart
patent: 4357295 (1982-11-01), Haddad et al.
patent: 4361527 (1982-11-01), Rarr
patent: 4376751 (1983-03-01), Druhane

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