Core-Shell Polymer Ink for Abrasion Resistance and Bleeding Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ink jet recording methods face challenges in achieving high abrasion resistance and preventing bleeding in recorded materials, particularly when the content of alkyl polyol with a standard boiling point above 280°C exceeds a certain limit, leading to insufficient drying properties and image quality issues.
Innovation Solution
An ink composition comprising a color material, water, and polymer particles with a core-shell structure, where the organic solvent has a boiling point between 150°C and 250°C, and the alkyl polyol content is limited to 2.0% or less, along with an aggregating liquid that enhances viscosity and adhesion, ensuring excellent ejection stability and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the content of alkyl polyol with a standard boiling point of equal to or greater than 280°C is increased to improve ejection stability, then ejection stability is improved, but abrasion resistance becomes insufficient and bleeding occurs
Solution Approach 1:
The patent changes the parameters of the organic solvent system by limiting alkyl polyol content to 2.0% or less and introducing a specific boiling point range (150-250°C), while also modifying polymer particle composition with core-shell structure and specific glass transition temperatures. This resolves the contradiction by achieving both ejection stability and abrasion resistance through optimized parameter combinations rather than relying on high alkyl polyol content.
Solution Approach 2:
The patent employs composite polymer particles with core-shell structure where the core polymer (Tg: -50°C to 50°C) and shell polymer (Tg: 60°C to 150°C) work together. The core provides flexibility and ejection stability while the shell provides durability and abrasion resistance, thus resolving the contradiction between ejection stability and abrasion resistance through material composition design.
2Stability of the object's composition
If the content of alkyl polyol with a standard boiling point of equal to or greater than 280°C is increased to maintain ink composition stability, then ink composition stability is improved, but drying property deteriorates
Solution Approach 1:
The patent optimizes the organic solvent composition by limiting high-boiling alkyl polyol to 2.0% or less and specifying a boiling point range of 150-250°C for the main organic solvent. This parameter optimization enables faster drying (improved temperature-related property) while maintaining ink composition stability through the balanced solvent system and polymer particle design.
3Strength
If the ink composition is designed to improve abrasion resistance, then abrasion resistance is improved, but bleeding occurs in the recorded material
Solution Approach 1:
The patent uses composite polymer particles with core-shell structure where the core polymer (Tg: -50°C to 50°C) and shell polymer (Tg: 60°C to 150°C) provide different functional properties. The core provides flexibility and adhesion to prevent bleeding, while the shell provides durability and abrasion resistance, thus simultaneously achieving both abrasion resistance and bleeding suppression.
Solution Approach 2:
The patent optimizes multiple parameters including alkyl polyol content (≤2.0%), organic solvent boiling point (150-250°C), and polymer particle glass transition temperatures. This multi-parameter optimization achieves the balance between abrasion resistance and bleeding suppression by controlling the physical and chemical properties of the ink composition and 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
The ink composition achieves improved abrasion resistance, suppresses bleeding, and maintains excellent ejection stability by controlling the polymer particles' glass transition temperatures and solvent content, resulting in enhanced image quality and glossiness.
Implementation Method 1
the polymer particles have a core-shell structure including core polymer and shell polymer, and a glass transition temperature of the shell polymer is higher than a glass transition temperature of the core polymer
Implementation Method 2
the organic solvent includes an organic solvent with a standard boiling point of equal to or greater than 150° C. and equal to or less than 250° C., and the content of the organic solvent that is an alkyl polyol with a standard boiling point of equal to or greater than 280° C. is equal to or less than 2.0% by mass
Data Source
AI summary
Provided is an ink composition that includes a color material, water, an organic solvent, and polymer particles, the organic solvent including an organic solvent with a standard boiling point of equal to or greater than 150° C. and equal to or less than 250° C., the content of the organic solvent that is an alkyl polyol with a standard boiling point of equal to or greater than 280° C. being equal to or less than 2.0% by mass with respect to a total amount of the ink composition, the polymer particles having a core-shell structure including core polymer and shell polymer, and a glass transition temperature of the shell polymer being higher than that of the core polymer, and that is used for a recording method using the ink composition and an aggregating liquid containing an aggregating agent capable of aggregating components of the ink composition and increasing viscosity of the components.