Laminate having microstructured substrate and method for producing the laminate
AssigneeEssilor International
InventorHaifeng SHAN
Life of this patent
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Abstract
A laminate, including a substrate having a microstructure on a surface thereof; and a coating layer formed on the substrate and encapsulating the microstructure of the substrate. A glass transition temperature T1 of the substrate is higher than a glass transition temperature T2 of the coating layer. A method of producing an ophthalmic lens, including deforming the laminate into a shape of the ophthalmic lens by applying heat and/or pressure at a temperature of lower than T1.
Claims15
A laminate, comprising:
- a substrate having a microstructure on a surface thereof;
- and
- a coating layer formed on the substrate and encapsulating the microstructure of the substrate,
- wherein a glass transition temperature T1 of the substrate is higher than a glass transition temperature T2 of the coating layer.
A method of processing a substrate having a microstructure on a surface thereof, the method comprising:
- forming a coating layer on the substrate such that the coating layer encapsulates the microstructure of the substrate;
- and
- deforming a laminate of the substrate and the coating layer by applying heat, pressure, or both,
- wherein a glass transition temperature T1 of the substrate is higher than a glass transition temperature T2 of the coating layer.
A method of producing an ophthalmic lens, comprising:
- extruding a first polymer having a glass transition temperature T1 to form a substrate;
- embossing a surface of the substrate to form a microstructure on the surface of the substrate;
- extruding a second polymer having a glass transition temperature T2 to form a coating layer on the substrate such that the coating layer encapsulates the microstructure of the substrate;
- and
- deforming a laminate of the substrate and the coating layer into a shape of the ophthalmic lens by applying heat, pressure, or both,
- wherein the glass transition temperature T1 of the first polymer is higher than the glass transition temperature T2 of the second polymer, and the laminate is deformed by thermoforming and/or injection molding a hot melt polymer over the laminate at a temperature lower than T1.
Dependencies are inferred from the claim text.