Inkjet ink composition for textile printing
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Solution Overview
Problem
Inkjet inks for textile printing that combine a urethane resin of relatively low fracture elongation with a crosslinking agent face challenges in achieving both sufficient washing fastness and good texture.
Innovation Solution
An inkjet ink composition for textile printing is developed, containing a water-dispersible resin with 1200 to 1800% fracture elongation and 10 to 48 MPa tensile strength, along with a crosslinking agent at specific mass ratios, selected from blocked isocyanate compounds, carbodiimide compounds, and oxazoline group-containing polymers, to enhance washing fastness and texture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a urethane resin of relatively low fracture elongation is combined with a crosslinking agent, then washing fastness is improved, but texture deteriorates
Solution Approach 1:
The patent changes the key parameter of fracture elongation from below 1200% to 1200-1800%, and adjusts the crosslinking agent content to 0.03-0.17 parts by mass per part of water-dispersible resin. This parameter optimization resolves the contradiction by achieving sufficient washing fastness while maintaining good texture, avoiding the overly rigid and poor texture caused by conventional formulations.
Solution Approach 2:
The patent uses a composite formulation combining water-dispersible resin with specific fracture elongation (1200-1800%) and tensile strength (10-48 MPa) properties with a crosslinking agent at optimized ratios. This composite approach allows the resin to provide flexibility and the crosslinking agent to provide washing fastness, resolving the contradiction between texture and washing fastness.
2Reliability
If a crosslinking agent is added to improve washing fastness, then washing fastness is improved, but dry abrasion fastness deteriorates
Solution Approach 1:
The patent optimizes the crosslinking agent content to a specific range (0.03-0.17 parts by mass per part of water-dispersible resin) and selects resin with specific mechanical properties (fracture elongation 1200-1800%, tensile strength 10-48 MPa). This parameter control ensures both washing fastness and dry abrasion fastness are improved simultaneously, avoiding the deterioration that occurs with conventional formulations.
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, an inkjet ink composition for textile printing is provided that contains a pigment, a water-dispersible resin, a crosslinking agent, and water; wherein, as the water-dispersible resin, a resin of 1200 to 1800% in fracture elongation and 10 to 48 MPa in tensile strength is contained by 1.0 to 3.0 parts by mass relative to 1 part by mass of the pigment, and the crosslinking agent is contained by 0.03 to 0.17 parts by mass relative to 1 part by mass of the water-dispersible resin.