Hard coat film and method for manufacturing the same, and display

A hard coat film with a polyorganosiloxane-based hard coat layer and perfluorinated scratch-resistant layer addresses curling and cracking issues, offering enhanced scratch and stain resistance for display cover windows.

JP7864686B2Active Publication Date: 2026-05-25KANEKA CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
KANEKA CORP
Filing Date
2022-03-11
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing hard coat materials for display cover windows, particularly those used in flexible and foldable displays, face issues with curling, cracking, and insufficient resistance to scratches and stains, especially when increased in thickness for hardness.

Method used

A hard coat film comprising a hard coat layer and a scratch-resistant layer on a transparent resin film, with a primer layer optionally in between, utilizing a polyorganosiloxane compound for the hard coat layer and a perfluorinated compound for the scratch-resistant layer, enhancing flexibility and resistance to scratches and stains.

Benefits of technology

The film provides excellent scratch and stain resistance, making it suitable for use as a cover window material in displays, while maintaining flexibility and transparency.

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Patent Text Reader

Abstract

This hard coat film (10) sequentially comprises, on a transparent resin film (1), a hard coat layer (3) and a scratch resistance layer (5). The scratch resistance layer contains a perfluoro compound. The hard coat layer is a layer of a cured product of a composition which contains a polyorganosiloxane compound that is a condensation product of a silane compound represented by general formula (1). In general formula (1), R1 represents a substituted or unsubstituted alkylene group having 1 to 16 carbon atoms; R2 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; x represents an integer of 2 or 3; and Y represents a glycidyloxy group or an alicyclic epoxy group.　(1): Y-R1-(Si(OR2)xR3 3-x)
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