Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1991-02-25
1993-02-02
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 17, 264 19, 264 22, 264106, B29D 1100
Patent
active
051835975
ABSTRACT:
A microstructure-bearing composite plastic article can be superior, both in microstructure and in physical properties, when it is a composite of a tough, flexible substrate, at a surface of which is microstructure formed of a cured oligomeric resin having hard segments and soft segments, which cured resin is substantially confined to the microstructure portion of the composite. Such a composite plastic article can be made by depositing an uncured oligomeric resin composition onto a master negative molding surface, filling the cavities by moving a bead of the composition between a substrate and the master, and curing the deposited composition by ultraviolet radiation while keeping the temperature during curing from rising not more than about 30.degree. C. above a typical use temperature of the finished composite plastic article. Alternatively, instead of regulating the temperature during curing, the article can be made by limiting the resin composition to an amount which does not protrude above the cavities by more than 20% of the cavity depth.
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Progress in the development of prism light guides, Steven G. Saxe, SPIE vol. 692, Materials and Optics for Solar Energy Conversion and Advanced Lighting Technology (1986).
Griswold Gary L.
Kirn Walter N.
Lowe James
Minnesota Mining and Manufacturing Company
Skolnick Steven E.
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