Antifogging plastic lens material
First Claim
Patent Images
1. An antifogging plastic lens material comprising:
- a substantially transparent polyester substrate;
a substantially transparent layer containing polyvinylidene chloride on said polyester substrate;
a substantially transparent water permeable colloid layer on said polyvinylidene chloride-containing layer; and
a substantially transparent layer containing polyvinyl alcohol on said water permeable colloid layer.
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Abstract
An antifogging plastic material is disclosed that is particularly suitable for use as a disposable fog-resistant lens. The lens material comprises a substantially transparent polyester substrate; a layer of polyvinylidene chloride-containing polymer on the polyester substrate; a water permeable colloid layer on the polyvinylidene chloride-containing layer; and a polyvinyl alcohol-containing layer on the water permeable colloid layer.
35 Citations
21 Claims
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1. An antifogging plastic lens material comprising:
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a substantially transparent polyester substrate; a substantially transparent layer containing polyvinylidene chloride on said polyester substrate; a substantially transparent water permeable colloid layer on said polyvinylidene chloride-containing layer; and a substantially transparent layer containing polyvinyl alcohol on said water permeable colloid layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. A method of preparing an antifogging plastic material that is particularly suitable for use as a disposable fog-resistant lens, said method comprising applying a layer of a polyvinyl alcohol-containing polymer to the surface of a polyester substrate that has a polyvinylidene chloride-containing layer on the polyester substrate, and a water permeable colloid layer on the polyvinylidene chloride-containing layer.
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20. A method of preparing an antifogging plastic material that is particularly suitable for use as a disposable fog-resistant lens, said method comprising:
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applying a layer of a polyvinylidene chloride-containing polymer to a polyester substrate; applying a layer of a water permeable colloid to the polyvinylidene chloride-containing layer; and applying a layer of polyvinyl alcohol-containing polymer to the water permeable colloid layer on the polyviylidene chloride-containing layer. - View Dependent Claims (21)
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Specification