Ink jet ink composition, ink pack, and ink jet printing method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink jet printing methods face challenges with ejection consistency and color development due to the decomposition of azo group-containing dyes, which increases dissolved nitrogen concentration, leading to air bubbles and inconsistent ink ejection.
Innovation Solution
An ink jet ink composition containing a dye with an azo group and a hindered amine compound with a radical, maintaining a dissolved nitrogen concentration of 10 ppm or less, which inhibits dye decomposition and ensures consistent ejection while maintaining high color developability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If azo group-containing dyes are used to achieve high color developability, then color development is improved, but dissolved nitrogen concentration increases causing air bubbles and ejection inconsistency
Solution Approach 1:
The patent extracts and removes nitrogen gas from the ink composition through degassing treatment, reducing dissolved nitrogen concentration to 10 ppm or less. This extraction approach eliminates the harmful effect of nitrogen bubbles while preserving the azo group-containing dye for high color development.
Solution Approach 2:
The patent changes the dissolved nitrogen concentration parameter to 10 ppm or less through controlled degassing. This parameter change resolves the contradiction by maintaining low nitrogen levels that prevent ejection inconsistency while allowing azo dyes to provide high color developability.
2Manufacturing precision
If dissolved nitrogen concentration is reduced to improve ejection consistency, then ejection performance is improved, but dye decomposition may be affected
Solution Approach 1:
The patent applies preliminary degassing treatment to the ink composition before use, reducing dissolved nitrogen concentration in advance to 10 ppm or less. This preliminary action ensures consistent ejection performance while the ink is still in the cartridge, preventing both ejection issues and dye decomposition problems.
Solution Approach 2:
The patent uses a nitrogen-permeable container as an intermediary that maintains the low dissolved nitrogen concentration (10 ppm or less) throughout storage and use. This container mediates between the need for low nitrogen levels and dye stability, allowing controlled nitrogen exchange while preserving ejection consistency and color development.
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 stable ejection consistency and satisfactory color development, allowing for continuous printing without degrading ejection performance, even with azo group-containing dyes, and the hindered amine compound's effect is retained effectively within specific proportions.
Implementation Method 1
a hindered amine compound having a radical... which inhibits dye decomposition
Implementation Method 2
The dissolved nitrogen concentration in the ink composition is 10 ppm or less... ensures consistent ejection
Data Source
AI summary
An ink jet ink composition contains a dye having an azo group, water, and a hindered amine compound having a radical. The dissolved nitrogen concentration of the ink composition is 10 ppm or less.