Method of manufacturing thermoplastic/resin molded optical membe

Details Method of manufacturing thermoplastic/resin molded optical membe Method of manufacturing thermoplastic/resin molded optical membe

1991-09-11

1993-07-27

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

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

264 22, 264 23, 264 27, 264 85, 264102, 264338, 264519, B29D 1100

Patent

active

052308405

ABSTRACT:
A method of manufacturing thermoplastic resin molded optical members comprising a thermoplastic resin material into a mold, defoaming thermoplastic resin material in vacuo at a specific temperature for causing the loaded thermoplastic resin material to melt and to flow, and producing a molded optical member by gradually cooling off the mold in the upward direction from the bottom side while pressurizing the interior of the mold with an inert gas. The inner surface of the mold is preferably preliminarily coated with a release material such as fluoroplastic containing either fluorinated alicyclic group or a fluorinated heterocyclic group in the main chain.

REFERENCES:
patent: 4571313 (1986-02-01), Allemand et al.

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