Active energy ray curable ink composition for ink jet printing

The active energy ray curable inkjet printing ink composition, formulated with specific polymerizable components and organic fine particles, addresses issues of slip and blocking while maintaining color gamut and reproducibility, enhancing the overall performance of the cured printing film.

JP7653568B1Active Publication Date: 2025-03-28SAKATA INX
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Patent Information

Application Number
JP2024168114
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-09-27
Publication Date
2025-03-28
Estimated Expiration
2044-09-27

AI Technical Summary

Technical Problem

Active energy ray curable inkjet inks face issues with poor slip properties of the cured printing film, leading to blocking when overlapped, and the presence of organic fine particles can narrow the color gamut, reducing color reproducibility.

Method used

The development of an active energy ray curable inkjet printing ink composition that includes a colorant, a polymerizable component with a monofunctional monomer and an amine-modified oligomer, organic fine particles with an average particle diameter of 0.1 to 0.8 μm, and a surface adjuster, optimized to maintain a colorant to organic fine particle ratio of 1.5 or less.

Benefits of technology

The ink composition achieves improved slipability and blocking resistance of the cured printing film while maintaining a wide color gamut, ensuring high color reproducibility and stability in ejection and curing properties.

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Abstract

In an active energy ray-curable ink composition for inkjet printing, the object is to improve the slipperiness of the cured printed film and suppress blocking while ensuring various properties required for inkjet printing ink (ejection stability, curability, flexibility (stretchability) of the cured printed film, abrasion resistance, and adhesion). Preferably, in an active energy ray-curable ink composition for inkjet printing containing organic fine particles, the object is to maintain the color gamut of the ink printed matter and improve color reproducibility. [Solution] The ink composition for active energy ray curable ink jet printing contains a colorant, a polymerizable component containing a monofunctional monomer and an amine-modified oligomer, organic fine particles, and a surface conditioner, in which: the organic fine particles have an average particle size of 0.1 to 0.8 μm; the content of the organic fine particles is 1.2 to 8 mass % relative to the ink composition; and the content ratio of the organic fine particles to the colorant component (organic fine particles / colorant component) is 1.5 or less.
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