LOW OXYGEN MOLDING OF SOFT CONTACT LENSES

摘要

A process and a system for providing essentially fully degassed complementary concave and convex lens molds to filling and mold assembly stations, respectively, in a continuous or semi-continuous automated soft contact lens manufacturing system. The process comprises injection molding the lens molds and immediately transferring the lens molds to an inert gas atmosphere. The lens molds are degassed and are then filled with a polymerizable monomer under the inert gas prior to mold assembly.