Claims
- 1. In a method of cast molding a contact lens that comprises curing a lens-forming mixture in a lens-shaped cavity formed between molding surfaces of first and second mold sections of a mold assembly,
- the improvement wherein at least one of said mold sections is injection molded from a thermoplastic polyolefin resin having a melt flow rate of at least about 21 g/10 min.
- 2. The method of claim 1, wherein both the first and second mold sections are injection molded from a thermoplastic polyolefin resin having a melt flow rate of at least about 21 g/10 min.
- 3. The method of claim 2, wherein the resin is a thermoplastic polypropylene resin having a melt flow rate of at least about 21 g/10 min.
- 4. The method of claim 1, wherein the resin is a thermoplastic polypropylene resin having a melt flow rate of at least about 21 g/10 min.
- 5. The method of claim 1, wherein the contact lens is formed of a rigid, gas permeable material.
Parent Case Info
This is a continuation of application Ser. No. 08/269,009 filed on Jun. 30, 1994, now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (1)
Entry |
"Flow Rates of Thermoplastics by Extrusion-Plastometer," American Society for Testing and Materials, Designation D 1238-86, pp. 552-565. |
Continuations (1)
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Number |
Date |
Country |
Parent |
269009 |
Jun 1994 |
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