Laminated optical film and image display device

By using specific polymerizable compounds in the adhesive layer of crystal-plated photovoltaic cells, the highlights and insufficient bonding strength in high temperature and high humidity environments are solved, and the appearance characteristics and bonding strength of the battery are improved.

JP2025038647AActive Publication Date: 2025-03-19NITTO DENKO CORP
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Patent Information

Application Number
JP2023145387
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-07
Publication Date
2025-03-19
Estimated Expiration
2043-09-07

AI Technical Summary

Technical Problem

In the prior art, crystal-plated photovoltaic cells used in automotive applications are prone to highlight problems in high temperature and high humidity environments, resulting in damage to appearance characteristics and insufficient adhesive strength.

Method used

An adhesive layer made of a photocurable adhesive consisting of at least one polymerizable compound and a specific polymerizable compound A, B, C, D and E are introduced into the adhesive layer to ensure compatibility and high bond strength between the adhesive layer and the polyacrylate film.

Benefits of technology

In high temperature and high humidity environments, the generation of highlights can be effectively suppressed, the appearance characteristics and adhesion strength of the photovoltaic cell can be maintained, and the long-term stability and performance of the cell can be ensured.

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Abstract

To provide a laminated optical film including at least an acrylic film, which suppresses foreign-matter-induced bright spots even after humid durability testing, maintains superior visual characteristics, and ensures strong adhesion between the laminated optical films.SOLUTION: A laminated optical film includes at least an acrylic film and a first optical film laminated on each other with an adhesive layer interposed therebetween, wherein the adhesive layer is made of a layer of a cured product from an adhesive composition containing at least a polymerizable compound, wherein the acrylic film is in direct contact with the adhesive layer. The HSP distance between the acrylic film and the adhesive layer is 1.9 or more and 5.0 or less. The adhesive layer has an elastic modulus of 108 Pa or more and 3×109 Pa or less.SELECTED DRAWING: Figure 1
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