inkjet ink
JP2026090591APending Publication Date: 2026-06-02KONICA MINOLTA INC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KONICA MINOLTA INC
- Filing Date
- 2026-03-04
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
Inkjet inks containing wax as a gelling agent face issues with poor varnishability due to wax crystallization upon impact with the substrate, leading to poor adhesion and wettability when varnished.
Method used
An image forming method and inkjet ink formulation using two or more types of waxes with specific melting point differences and mass ratios, combined with a polymerizable compound, are irradiated with active rays to form an image with controlled adhesion force distribution, ensuring a wax coverage ratio of 0.70 or less.
Benefits of technology
Improves varnishability by reducing wax coverage on the image surface, enhancing adhesion to varnish layers and maintaining inkjet ink properties like pinning and ejection.
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Smart Images
Figure 2026090591000001_ABST
Abstract
The objective is to provide an inkjet ink that can improve the varnishability of the resulting image. [Solution] The inkjet ink contains wax and a polymerizable compound and hardens upon irradiation with active light. The inkjet ink is applied to high-quality coated paper at a substrate temperature of 40°C at a rate of 11 g / m². 2 The coating obtained by applying it was subjected to an integrated light intensity of 400 mJ / m 2 In an image obtained by curing with ultraviolet irradiation, the adhesion force distribution image Y' obtained by measuring the force curve of the image surface using a scanning probe microscope is divided into two regions based on the magnitude of the cohesive force according to a predetermined procedure, with the region with low adhesion force designated as region A' and the region with high adhesion force designated as region B'. A The ratio S' of the sum of the areas of region A' and region B'. A ' / S' satisfies the condition of being 0.70 or less.
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