Cr-Co Reactive Black Ink Composition for Textile Color and Nozzle Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink jet ink compositions for textile printing, particularly those containing C. I. Reactive Black 8, suffer from poor color development, light resistance, and nozzle clogging due to head drying after long-term storage.
Innovation Solution
An ink jet ink composition comprising a coloring material with specific ratios of Cr and Co compounds, along with a water-soluble organic solvent and water, to enhance color development, light resistance, and prevent nozzle clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If C. I. Reactive Black 8 is used as a coloring material, then color development is enhanced, but light resistance deteriorates
Solution Approach 1:
The patent combines C. I. Reactive Black 8 with specific chromium and cobalt compounds to create a composite coloring material system. This composite approach allows the ink to achieve both good color development from the reactive black dye and improved light resistance from the metal compounds, resolving the contradiction between these two properties.
Solution Approach 2:
The patent optimizes the concentration parameters of chromium and cobalt compounds within specific ranges (chromium: 0.01-5% by mass, cobalt: 0.01-5% by mass) to achieve the best balance between color development and light resistance. By carefully controlling these compositional parameters, both properties are improved simultaneously.
2Manufacturing precision
If ink composition is optimized for color development, then light resistance deteriorates, but nozzle clogging increases due to head drying
Solution Approach 1:
The patent introduces chromium and cobalt compounds as intermediary substances that mediate between the coloring material and the nozzle system. These compounds prevent direct harmful interactions that lead to clogging, while also enhancing the overall performance of the coloring system. The intermediaries protect the nozzle from drying-related clogging issues.
Solution Approach 2:
The patent adjusts the chemical composition parameters by adding specific concentrations of chromium (0.01-5% by mass) and cobalt (0.01-5% by mass) compounds, which change the physical and chemical properties of the ink to prevent nozzle clogging while maintaining good color development.
3Manufacturing precision
If ink composition contains high concentration of coloring material, then color development improves, but storage stability deteriorates causing head drying
Solution Approach 1:
The patent creates a composite ink formulation where C. I. Reactive Black 8 is combined with chromium and cobalt compounds in specific ratios. This composite structure enhances storage stability while maintaining good color development, resolving the contradiction between high coloring material concentration and storage stability.
Solution Approach 2:
The patent optimizes the concentration parameters of all components including coloring material, chromium compound (0.01-5% by mass), and cobalt compound (0.01-5% by mass) to achieve the optimal balance between color development and storage stability, preventing head drying during long-term storage.
Data Source
AI summary
An ink jet ink composition includes a coloring material, a water-soluble organic solvent, and water. The coloring material contains a compound (A) having Cr (chromium) as Me in a structure represented by formula (1) below, and a compound (B) having Co (cobalt) as Me in the structure represented by the formula (1) below, and the mass ratio of the compound (B) to the compound (A) is over 0 and 0.06 or less.