Light-polarizing film

Details Light-polarizing film Light-polarizing film

1985-11-12

1989-08-22

Corbin, John K.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427163, 428543, G02B 530, B05D 506, D06N 706

Patent

active

048590398

ABSTRACT:
Highly durable, light-polarizing film having neutral gray as well as high polarizing coefficient is provided. The film comprises a uniaxially stretched base polymer film of, for example, polyvinyl alcohol or derivatives thereof and at least two dichroism dyes adsorbed and orientated therein. The dichroism dyes are, for example, C.I. DIrect Yellow 12, C.I. Direct Black 17 and C.I. Direct Blue 202. The film is usable for display by liquid crystal. A boric-acid treatment is used to improve the polarization properties.

REFERENCES:
patent: 2236972 (1941-04-01), Kasemann
patent: 2246087 (1941-06-01), Bailey et al.
patent: 2346766 (1944-04-01), Land
patent: 2454515 (1948-11-01), Land
patent: 4268127 (1981-05-01), Oshima et al.
patent: 4387133 (1983-06-01), Ichikawa et al.

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