Ink Set Polymer Particle Aggregation for Image Deformation
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Solution Overview
Problem
Ink jet recording technologies face challenges in achieving high-speed recording with sufficient scratch resistance and image quality, particularly due to secondary color image deformation when using ink compositions with polymer particles, which results in density and color unevenness.
Innovation Solution
An ink set comprising an ink composition with polymer particles having 65 mass % or more derived from methacrylic acid derivatives and a treating liquid that forms an aggregate with the ink composition, applied using an ink jet system to prevent secondary color image deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed ink jet recording is performed using conventional ink compositions, then recording speed is improved, but secondary color image deformation occurs resulting in density and color unevenness
Solution Approach 1:
The patent applies parameter changes by carefully controlling the glass transition temperature (Tg) of polymer particles within -50°C to 50°C and the ink composition pH within 2.0 to 9.0. These parameter optimizations prevent secondary color image deformation while enabling high-speed recording, resolving the contradiction between recording speed and image quality
2Strength
If ink compositions with polymer particles are used to improve scratch resistance, then fixing property is improved, but secondary color image deformation occurs during high-speed recording
Solution Approach 1:
The patent optimizes specific parameters including polymer particle Tg (-50°C to 50°C), ink pH (2.0 to 9.0), and polymer particle content (0.1 to 20 mass%). These controlled parameter changes enable the ink to achieve both scratch resistance and uniform image quality without secondary color deformation during high-speed recording
3Productivity
If the time interval between applying first color ink and second color ink is reduced to one second or shorter for high-speed recording, then productivity is improved, but secondary color image deformation is generated
Solution Approach 1:
The patent controls the ink composition pH within 2.0 to 9.0 and polymer particle glass transition temperature within -50°C to 50°C, which stabilizes the ink film formation process. This allows sequential colors to be applied within one second or shorter intervals without causing secondary color image deformation, maintaining both high productivity and image stability
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
The solution effectively suppresses secondary color image deformation and enhances image quality by ensuring stable polymer particle dispersion and aggregation, resulting in high-density, high-resolution images with improved scratch resistance during high-speed recording.
Implementation Method 1
an ink composition containing a polymer particle having 65 mass % or more of a constituent unit derived from a methacrylic acid derivative and a coloring material, and a treating liquid which form an aggregate when contacted with the ink composition
Data Source
AI summary
An ink set for ink jet recording including an ink composition containing a coloring material, and a polymer particle including 65 mass % or more of a constituent unit derived from a methacrylic acid derivative, and a treating liquid which forms an aggregate when contacted with the ink composition, and an ink jet recording method using the same are provided.