METHOD FOR PRODUCING SILICONE HYDROGEL CONTACT LENSES

The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. A method of the invention comprising the steps of formulating a lens formulation by disso...

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Hauptverfasser: GE, Junhao, WU, Daqing, BREITKOPF, Richard Charles, ZHANG, Steve Yun, KUMI, Augustine Twum
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creator GE, Junhao
WU, Daqing
BREITKOPF, Richard Charles
ZHANG, Steve Yun
KUMI, Augustine Twum
description The invention provides a contact lens manufacturing method comprising a process for removing unprocessed molded silicone hydrogel contact lenses from mold halves in a relatively efficient and consistent manner. A method of the invention comprising the steps of formulating a lens formulation by dissolving/blending all polymerizable components in a mixture a hydrophobic acrylic monomer as a reactive diluent and an organic solvent as a non-reactive diluent at a weight ratio of least 0.24 (reactive diluent over the sum of reactive and non-reactive solvents) per gram of the polymerizable composition and using a relatively low ultrasonic vibration energy for delensing. This method of the invention can be easily implemented in a production environment for enhancing the production yield.
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICS
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
title METHOD FOR PRODUCING SILICONE HYDROGEL CONTACT LENSES
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