Textile Ink Jet Ink Reactive Blue 49 Light Resistance
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Solution Overview
Problem
Conventional ink jet inks for textile printing face challenges in achieving both suitable optical density and high light resistance, particularly in light black (gray) ink applications, where the concentration of dyes needs to be adjusted to balance color and light resistance, often resulting in insufficient light resistance.
Innovation Solution
The development of an ink jet ink containing 1.2% to 2.3% C.I. Reactive Blue 49 as a primary dye, along with complementary dyes, which enhances light resistance and optical density, while maintaining environmental friendliness by limiting nickel, cobalt, and chromium ion content to 10 ppm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the concentration of reactive dye is decreased to achieve low optical density suitable for light ink, then the optical density is improved, but the light resistance becomes insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of C.I. Reactive Blue 49 within the range of 1.2% to 2.3% by mass. This specific concentration range optimizes the balance between achieving sufficient light resistance and maintaining appropriate optical density for light ink applications, resolving the contradiction between these two parameters.
Solution Approach 2:
The patent employs composite material principles by formulating an ink composition containing multiple components including C.I. Reactive Blue 49 as the primary dye, supplemented by other reactive dyes and auxiliary substances. This composite formulation enhances light resistance while maintaining suitable optical density, overcoming the limitation of using a single dye at low concentration.
2Reliability
If the concentration of reactive dye is increased to improve light resistance, then the light resistance is improved, but the optical density becomes too high for light ink applications
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of C.I. Reactive Blue 49 within the range of 1.2% to 2.3% by mass. This specific concentration range optimizes the balance between achieving sufficient light resistance and maintaining appropriate optical density for light ink applications, resolving the contradiction between these two parameters.
3Illumination intensity
If intense coloring dyes are used to achieve suitable optical density, then the optical density is improved, but the light resistance becomes insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of C.I. Reactive Blue 49 within the range of 1.2% to 2.3% by mass. This specific concentration range optimizes the balance between achieving sufficient light resistance and maintaining appropriate optical density for light ink applications, resolving the contradiction between these two parameters.
Solution Approach 2:
The patent introduces auxiliary substances as intermediaries that enhance the performance of the dye system. These auxiliary components improve light resistance and overall ink performance without requiring high dye concentration, thereby resolving the contradiction between optical density and light resistance.
Data Source
AI summary
An ink jet ink for textile printing contains a reactive dye, where 1.2% by mass or more and 2.3% by mass or less of C.I. Reactive Blue 49 based on the total amount of the ink is contained as the reactive dye.