Inkjet recording method, inkjet recording device, and water-based ink

The inkjet recording method addresses the challenge of sedimentation and opacity by using small particles and a controlled heating process to create voids, achieving high-opacity images with improved sedimentation resistance.

JP2026091258APending Publication Date: 2026-06-03CANON KK
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CANON KK
Filing Date
2025-11-10
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Inkjet recording methods face challenges in achieving high opacity while preventing sedimentation of titanium dioxide particles, which are prone to settle due to their high density and large particle size, leading to a trade-off between sedimentation velocity and opacity.

Method used

An inkjet recording method that applies an aqueous ink containing particles with an average primary diameter of 150 nm or less, combined with a heating process that melts resin particles to create voids, forming a binder with improved opacity by scattering light due to refractive index differences.

Benefits of technology

The method enables recording of images with excellent opacity and sedimentation resistance by using small particles and a controlled heating process to form voids, enhancing image strength and resistance to settling.

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Abstract

This invention provides an inkjet recording method that allows for the recording of images with excellent opacity while using water-based ink with excellent resistance to settling. [Solution] An inkjet recording method comprising, in this order, an ink application step of applying ink to a recording medium, and a heating step of heating the recording medium to which the ink has been applied. The ink contains particles, first resin particles, and a first water-soluble organic solvent whose boiling point is higher than that of water, and the average primary particle diameter of the particles is 150 nm or less. In the heating step, the recording medium is heated at a temperature above the minimum film-forming temperature of the first resin particles in the first water-soluble organic solvent, and below the glass transition temperature or melting point of the particles, thereby melting the first resin particles and creating voids.
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