Inkjet ink
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Solution Overview
Problem
Existing inkjet inks for textile printing struggle to achieve desired image density and color fastness to washing, particularly in textile prints made from polyester fabrics.
Innovation Solution
The development of an inkjet ink containing coloring particles formed from a reaction product between a reactive dye and a specific resin having a primary hydroxyl group, which enhances color formability and resistance to water solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inkjet inks are used for textile printing, then the printing process can be performed, but the image density is insufficient and color fastness to washing is poor
Solution Approach 1:
The patent uses composite coloring particles formed by reacting a reactive dye with a specific resin having a primary hydroxyl group. This composite structure combines the coloring capability of the reactive dye with the fastness properties of the resin, achieving both high image density and excellent color fastness to washing simultaneously.
Solution Approach 2:
The patent changes the chemical parameters of the coloring agent by using a reaction product between a reactive dye and a specific resin with primary hydroxyl group. This parameter change transforms the properties of the coloring particles to achieve both desired image density and superior washing fastness.
2Reliability
If reactive dye is used alone, then color formability is achieved, but water solubility causes elution during washing
Solution Approach 1:
The patent creates composite coloring particles by reacting reactive dye with a specific resin having a primary hydroxyl group. The resin component provides water resistance to prevent elution, while the reactive dye component maintains color formability, thus resolving the contradiction between water solubility resistance and color formability.
Solution Approach 2:
The specific resin with primary hydroxyl group acts as an intermediary between the reactive dye and the textile substrate. It forms a reaction product that bridges the dye and fabric, providing both color formation and water resistance, preventing direct elution of the dye into washing water.
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 inkjet ink achieves images with desired image density and forms textile prints with excellent color fastness to washing, as the reaction product particles remain stable and do not elute during washing.
Implementation Method 1
The coloring particles contain a reaction product between a reactive dye and a specific resin having a primary hydroxyl group
Data Source
AI summary
An inkjet ink contains coloring particles and an aqueous medium. The coloring particles contain a reaction product between a reactive dye and a specific resin having a primary hydroxyl group. The reactive dye may have a chlorotriazinyl group. The specific resin may include a styrene-(meth)acrylic resin, a polyester resin, or a urethane resin.