Inkjet recording method, inkjet recording device, and water-based ink
The inkjet recording method with resin particles addresses sedimentation and opacity issues by creating voids in the ink film, ensuring high dry opacity and water-resistant images.
JP2026091250APending Publication Date: 2026-06-03CANON KK
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- CANON KK
- Filing Date
- 2025-10-29
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Inkjet recording methods using white inks with titanium dioxide or hollow particles face issues with sedimentation and reduced opacity when exposed to water, leading to decreased image quality.
Method used
An inkjet recording method using an aqueous ink containing first and second resin particles with specific size, density, and glass transition/melting point properties, where the ink is applied and heated to create voids, enhancing dry opacity and resisting water-wetting opacity loss.
Benefits of technology
The method achieves high dry opacity and suppresses opacity reduction when water adheres, improving image quality and sedimentation resistance without using heavy pigments like titanium dioxide.
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Smart Images
Figure 2026091250000001_ABST
Abstract
Provided is an inkjet recording method capable of recording an image that is excellent in concealability and suppresses a decrease in concealability when water adheres to the image when using an aqueous ink excellent in sedimentation resistance. 【Solution means】 It is an inkjet recording method for recording an image on a recording medium using an aqueous ink containing particles, first resin particles, and second resin particles. The recording medium to which the aqueous ink is applied has a glass transition temperature Tg 3 (°C) or melting point Tm R1 (°C) or higher, and a heating step of heating to a temperature lower than the glass transition temperature Tg P (°C) or melting point Tm P (°C) of the particles is included. The average primary particle diameter D P (nm) of the particles is 150 nm or less, and the density ρ R1 (g / cm 3 ) of the first resin particles is more than 1.0 times the density ratio with respect to the density ρ R2 (g / cm 3 ) of the second resin particles. Then, in the heating step, the recording medium is heated to melt the first resin particles and generate pores.
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