Sheet for inkjet printing

JPWO2025069338A1Pending Publication Date: 2025-04-03
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Patent Information

Application Number
JP2025548194
Authority / Receiving Office
JP · JP
Patent Type
Applications
Filing Date
2023-09-28
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

Inkjet printing sheets experience print unevenness and optical interference patterns due to improper dot interference and reduced print density, particularly when used on transparent surfaces like glass.

Method used

The inkjet printing sheet is designed with a laminated structure containing an ink-receiving layer composed of a cured layer of an energy ray-curable compound, a silicone-based leveling agent, and a filler, with a water contact angle of 80° or less and a refractive index difference greater than -0.03 between the ink-receiving layer and the adjacent layer.

Benefits of technology

This configuration suppresses dot interference, ensuring sufficient print density and preventing optical interference patterns, enhancing the transparency and print quality of the inkjet printing sheets.

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Abstract

Provided is a sheet for inkjet printing, wherein an ink-receiving layer is in direct contact with one surface of a substrate layer or with an easy-adhesion layer formed on one surface of the substrate layer, the other surface of the substrate layer has, in this order, an adhesive layer and a release liner in a laminated structure. The release liner has a silicone-based release agent layer on the contact surface contacting the adhesive layer. The ink-receiving layer is a cured layer of a composition for forming the ink-receiving layer, contains an energy ray-curable compound (A), a silicone-based leveling agent (B), and a filler (C). The energy ray-curable compound (A) is an ester of a polyol compound and (meth)acrylic acid. The water contact angle of the ink-receiving layer is 80° or less, and the difference in refractive index [(X)-(Y)] between the refractive index (X) of the ink-receiving layer and the refractive index (Y) of the layer directly in contact with the ink-receiving layer is greater than -0.03.
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