Low oxygen molding of soft contact lenses

Details Low oxygen molding of soft contact lenses Low oxygen molding of soft contact lenses

1997-03-06

1998-05-19

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Including step of mold making

264 11, 264 85, B29D 1100

Patent

active

057531501

ABSTRACT:
A process for providing degassed complementary concave and convex lens molds to filling and mold assembly stations in a continuous or semicontinuous automated soft contact lens manufacturing system. The process includes injection molding the lens molds, immediately transferring the lens molds to an inert gas atmosphere, degassing the lens molds, and filling the lens molds with a polymerizable monomer under the inert gas prior to mold assembly.

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"Acrylic and Methacrylic Ester Polymers", Encyclopedia of Polymer Science and Engineering, 2nd Edition, vol. 1, pp. 265-269.

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