Ink Jet Recording Method Resolving Odor and Bleeding
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Solution Overview
Problem
Ink jet recording methods using reaction liquids on low-absorbing or non-absorbing recording media face issues with odor from the reactant and bleeding or graininess due to poor ink penetration and absorption.
Innovation Solution
The method involves adjusting the deposition amounts of a reaction liquid and ink composition on the recording medium, using a carboxylic acid or carboxylate reactant with a resin and water, to achieve a specific mass ratio between resin and reactant deposition, which suppresses odor and improves image quality by controlling bleeding and graininess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a reaction liquid is used on low-absorbing or non-absorbing recording medium, then bleeding and graininess are suppressed, but bad odor occurs due to reactant penetration failure
Solution Approach 1:
The invention changes the parameters of the reaction liquid by specifying the type of surfactant (fluorine-based or silicone-based) and controlling the deposition amount ratio between reaction liquid and ink composition. This parameter optimization enables the reaction liquid to properly interact with the ink on low-absorbing media, suppressing odor while maintaining image quality.
Solution Approach 2:
The invention uses composite material approach by combining specific surfactants (fluorine-based or silicone-based) with carboxylic acid or carboxylate reactants in the reaction liquid. This composite formulation enhances the liquid's ability to penetrate and react on non-absorbing media without causing odor issues.
2Productivity
If reaction liquid is deposited on low-absorbing or non-absorbing recording medium, then ink penetration is improved, but odor from reactant becomes problematic
Solution Approach 1:
The invention optimizes the deposition amount parameters by controlling the mass ratio between reaction liquid and ink composition (specifically the resin/reactant ratio between 1.5-16). This parameter control ensures sufficient penetration and reaction while minimizing reactant residue that causes odor.
Solution Approach 2:
The invention introduces surfactants (fluorine-based or silicone-based) as intermediaries that facilitate the penetration of reaction liquid into low-absorbing media. These surfactants act as mediators between the reactant and the recording medium, enabling effective ink interaction without causing odor problems.
3Object-generated harmful factors
If no reaction liquid is used, then odor problem is avoided, but bleeding and graininess occur
Solution Approach 1:
The invention changes the approach by optimizing the deposition amount ratio parameters to such an extent that the reaction liquid is fully utilized in the reaction, leaving minimal unreacted reactant. This parameter optimization achieves both odor avoidance and high image quality by preventing bleeding and graininess.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces the odor of the reactant and enhances image quality by preventing bleeding and graininess, even on low-absorbing or non-absorbing media, resulting in high-definition recorded matter.
Implementation Method 1
the reaction liquid contains a reactant which is a carboxylic acid or carboxylate that reacts with a component of the ink jet ink composition
Implementation Method 2
a particle diameter of the resin fine particle increases by 30 times or more in a first mixed liquid containing the resin fine particle and the reactant
Data Source
AI summary
An ink jet recording method includes attaching a reaction liquid and one or more ink jet ink compositions to a low-absorbing or non-absorbing recording medium, in which the reaction liquid contains a reactant which is a carboxylic acid or carboxylate that reacts with a component of the ink jet ink composition, the ink jet ink composition contains a resin and water, and when a deposition amount in an area in which the deposition amount of the resin is the greatest per unit area in a deposition area of the ink jet ink composition on the low-absorbing or non-absorbing recording medium is set to be 100%, the reaction liquid and the ink jet ink composition are deposited so that a mass ratio between the deposition amount of the resin and the deposition amount of the reactant (resin/reactant) in the deposition area in which the deposition amount of the resin is in a range of 20% to 100% is in a range of 1.5 to 16.