Ink Jet Recording Method Using Aggregating Agent
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Solution Overview
Problem
Ink jet recording methods using water-based ink compositions face challenges with discharge stability, abrasion resistance, and image quality, particularly when using reaction solutions containing aggregating agents, which can lead to poor storage stability and reduced glossiness on low ink absorbability or non-ink absorbability recording media.
Innovation Solution
The method involves using a water-based ink composition with a surface-treated pigment and a reaction solution containing an aggregating agent, where the attachment amount of the ink composition is 2 to 20 times that of the reaction solution, and the ink composition is discharged from an ink jet head to improve reactivity and reduce the coating amount of the reaction solution, enhancing image quality and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a reaction solution containing an aggregating agent is used to fix ink at an early stage, then bleeding is suppressed and image quality is improved, but discharge stability is deteriorated
Solution Approach 1:
The patent applies parameter changes by carefully controlling the concentration ratio of aggregating agent to pigment (0.01-10 mass%), the attachment amount ratio of ink composition to reaction solution (2-20 times), and the particle size distribution of pigment. These parameter optimizations enable early ink fixation with improved image quality while maintaining discharge stability of the ink jet system.
2Manufacturing precision
If a reaction solution containing an aggregating agent is used to fix ink at an early stage, then bleeding is suppressed, but abrasion resistance is deteriorated
Solution Approach 1:
The patent optimizes the concentration of aggregating agent (0.01-10 mass% relative to pigment) and the attachment amount ratio of ink to reaction solution (2-20 times) to achieve a balance where sufficient ink fixation occurs while preserving the integrity and abrasion resistance of the recorded material.
3Manufacturing precision
If a reaction solution containing an aggregating agent is used to fix ink at an early stage, then bleeding is suppressed, but glossiness is deteriorated
Solution Approach 1:
The patent controls the concentration of aggregating agent (0.01-10 mass% relative to pigment) and optimizes the attachment amount ratio of ink composition to reaction solution (2-20 times) to achieve appropriate ink fixation while maintaining the surface smoothness and glossiness of the recorded material.
4Manufacturing precision
If a reaction solution containing an aggregating agent is used to fix ink at an early stage, then bleeding is suppressed, but storage stability is deteriorated
Solution Approach 1:
The patent optimizes the concentration of aggregating agent (0.01-10 mass% relative to pigment) and the attachment amount ratio of ink to reaction solution (2-20 times) to achieve sufficient ink fixation while maintaining the compositional stability and preventing deterioration during storage of the recorded material.
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 ensures excellent image quality, discharge stability, and abrasion resistance while reducing the amount of aggregating agent used, thereby improving the overall performance of the recorded material on various recording media.
Implementation Method 1
a reaction solution containing an aggregating agent that aggregates ink components
Implementation Method 2
a pigment dispersion containing a surface-treated pigment and water
Data Source
AI summary
An ink jet recording method includes attaching a reaction solution which contains an aggregating agent for aggregating a component of a water-based ink composition to a recording region of a recording medium, and attaching a water-based ink composition which contains a pigment dispersion containing a surface-treated pigment and water to the recording region of the recording medium by discharging the water-based ink composition from an ink jet head, in which the recording region includes a region in which an attachment amount of the water-based ink composition is in a range of 2 times to 20 times the attachment amount of the reaction solution.