Stacked optical film

By using an active energy ray-curable adhesive composition containing oxime ester photopolymerization initiators and sensitizers, the problem of insufficient adhesion of optical films was solved, achieving high adhesion and high reactivity on ultraviolet absorbing optical films.

CN122422795APending Publication Date: 2026-07-17NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NITTO DENKO CORP
Filing Date
2024-08-26
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing adhesive compositions for optical films have insufficient adhesion when bonded to optical films with ultraviolet absorption capabilities.

Method used

An active energy ray-curable adhesive composition containing an oxime ester photopolymerization initiator is used to form an adhesive layer with a sensitizer for laminating optical films. Anthracene and naphthalene sensitizers are preferred to improve adhesion.

Benefits of technology

Even with optical films that absorb ultraviolet light, adhesion is significantly improved, and the sensitivity and reactivity to active energy rays are also higher.

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Abstract

本发明涉及一种层叠光学膜，其依次层叠有光学膜1、粘接剂层及光学膜2，上述粘接剂层由含有肟酯类光聚合引发剂的活性能量射线固化型粘接剂组合物形成，上述光学膜1及2中的至少一者为具有紫外线吸收能力的光学膜。该层叠光学膜即使在贴合了具有紫外线吸收能力的光学膜的情况下，粘接性也优异。
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