White Textile Ink Composition Balancing Wash Fastness and Texture
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Solution Overview
Problem
White inkjet inks for textile printing face challenges in achieving sufficient washing fastness and coating film strength while maintaining good texture due to their high colorant content.
Innovation Solution
A white inkjet ink composition combining a water-dispersible urethane resin with reactivity to cationic compounds, a crosslinking agent, and a glycol ether, where the crosslinking agent is present in specific proportions relative to the urethane resin, and the glycol ether dissolves in water, enhancing washing fastness and coating film resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If white inkjet ink contains high quantity of colorant to achieve image density, then image density is improved, but washing fastness and coating film strength deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the ink composition by specifying precise ratios of crosslinking agent (0.02 to 0.15 parts by mass per 1 part by mass of urethane resin) and glycol ether solvents with specific water solubility (1 to 60 g per 100 g of water). This parameter optimization allows the formulation to achieve both high image density and sufficient washing fastness simultaneously
Solution Approach 2:
The patent creates a composite ink system combining water-dispersible urethane resin with reactivity to cationic compounds, crosslinking agents, and glycol ether solvents. This composite formulation synergistically improves both image density and washing fastness, resolving the contradiction between these two properties
2Illumination intensity
If white inkjet ink contains high quantity of colorant to achieve image density, then image density is improved, but coating film strength deteriorates
Solution Approach 1:
The patent optimizes the concentration parameters of crosslinking agent (0.02 to 0.15 parts by mass per 1 part by mass of urethane resin) and glycol ether solvent (1 to 60 g per 100 g of water), achieving a balance that provides both high image density and adequate coating film strength through controlled chemical composition
Solution Approach 2:
The ink formulation uses a composite system of water-dispersible urethane resin with cationic reactivity, crosslinking agents, and glycol ether solvents that work synergistically to provide both high image density and sufficient coating film strength, resolving the trade-off between these properties
3Reliability
If crosslinking agent content is increased to improve washing fastness, then washing fastness is improved, but texture deteriorates
Solution Approach 1:
The patent precisely controls the crosslinking agent content within 0.02 to 0.15 parts by mass per 1 part by mass of urethane resin, and selects glycol ether solvents with specific water solubility (1 to 60 g per 100 g of water). This parameter optimization ensures sufficient washing fastness while preventing texture deterioration that would occur with excessive crosslinking
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 composition achieves high image density, excellent coating film resistance, and good texture, with improved washing fastness, as demonstrated by printing on fabrics.
Implementation Method 1
a water-dispersible urethane resin having reactivity to cationic compounds
Implementation Method 2
a glycol ether that dissolves by 1 to 60 g in 100 g of water
Data Source
AI summary
An object is to achieve both good washing fastness and texture by combining a urethane resin of high fracture elongation with a small quantity of crosslinking agent. As a means for achieving the object, a white inkjet ink composition for textile printing is provided that contains a white pigment, a water-dispersible urethane resin having reactivity to cationic compounds, a crosslinking agent, a water-soluble organic solvent, and water; wherein the crosslinking agent is contained by 0.02 to 0.15 parts by mass relative to 1 part by mass of the water-dispersible urethane resin, and as the water-soluble organic solvent, a glycol ether that dissolves by 1 to 60 g in 100 g of water is contained.