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US 11,884,041 B2Granted
Method for preparing multi-layer optical laminates
Assignee3M Innovative Properties Company
InventorsKazuta Saito, Katsuya Takamori
Life of this patent
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Abstract
Methods for preparing multi-layer optical laminates include placing an optical film that is free form an adhesive layer between first and second glass substrates that are free of an adhesive layer, placing this laminate under vacuum, and then heating the laminate under pressure to a temperature above the softening temperature of the optical film. The glass substrates are free of an adhesive layer but may include a silane surface treatment. The resulting multi-layer laminate is optically clear and does not show scattering of reflected light by the optical film.
Claims6
A multi-layer article comprising:
- a first glass substrate with a first major surface and a second major surface;
- a second glass substrate with a first major surface and a second major surface;
- and
- a first optical film with a first major surface and a second major surface comprising one or more layers of polymeric material, wherein the second major surface of the first glass substrate is interfacially bonded to the first major surface of the first optical film, wherein the interfacial bond between the first glass substrate and the first optical film is free from an adhesive layer, and wherein the second major surface of the first optical film is interfacially bonded with the first major surface of the second glass substrate, wherein the interfacial bond between the first optical film and the second glass substrate is free from an adhesive layer, and wherein each of the second major surface of the first glass substrate and the first major surface of the second glass substrate is a treated or untreated surface, wherein the treated surface comprises a silane coupling agent-treated surface, and wherein the multi-layer article is optically clear and does not show scattering of reflected light by the first optical film.
1 more element
Dependencies are inferred from the claim text.