Optical laminate
The optical laminate with polycarbonate resin layers and adhesive layers addresses adhesion issues in curved optical components, enhancing durability and preventing layer separation.
JP2025154860APending Publication Date: 2025-10-10SUMITOMO BAKELITE CO LTD
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Patent Information
- Application Number
- JP2024058100
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-10-10
AI Technical Summary
Technical Problem
Optical components with a laminated optical function layer on a curved lens surface face the risk of layer separation due to adhesion issues.
Method used
An optical laminate comprising a polarizing film sandwiched between first and second resin layers, with each resin layer having low and high molecular weight layers, and adhesive layers to enhance bonding strength, particularly using polycarbonate and urethane adhesives, to prevent layer separation.
Benefits of technology
The laminate effectively prevents unintended separation of layers even when curved, ensuring durability and maintaining optical functionality.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide an optical laminate used by being bent in one direction, in which inadvertent separation of any layer can be prevented.SOLUTION: An optical laminate 10 according to the present invention is used by being bent in one direction, and comprises: a polarization film 4; a first resin layer 2 provided on a bent recess side of the polarization film 4 and including mainly polycarbonate; a second resin layer 3 provided on a bent recess side of the polarization film 4 and including mainly polycarbonate; a first adhesive layer 5 provided between the polarization film 4 and the first resin layer 2, for adhering these; and a second adhesive layer 6 provided between the polarization film 4 and the second first resin layer 3, for adhering these. The first resin layer 2 includes a first low molecular weight layer 21 being in contact with the first adhesive layer 5 and a first high molecular weight layer 22 located on the side reverse from the first adhesive layer 5.SELECTED DRAWING: Figure 2
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