Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1993-08-06
1994-05-17
Buffalow, Edith
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
428 1, 428220, 524 89, B05D 136
Patent
active
053125681
ABSTRACT:
Process for the manufacture of a polarizing film by drawing a polymer film containing a dichroic dye at a temperature above the glass transition temperature of the polymer, the polymer film consisting mainly of a semicrystalline polyolefine and being drawn at a temperature below the crystalline melting point of the polyolefine, the dye being present in liquid form at that drawing temperature, and a polarizing dye-containing polyolefine film having a dichroic ratio of at least 15.
REFERENCES:
patent: 4824882 (1989-04-01), Nakamura et al.
patent: 4842781 (1989-06-01), Nishizawa et al.
Buffalow Edith
DSM N.V.
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