Ink Jet Textile Printing Compositions for Feel and Rubbing Fastness
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Solution Overview
Problem
Ink jet textile printing methods fail to achieve a balance between feel and texture and fastness to rubbing, with existing compositions either lacking in texture and feel or not providing sufficient rubbing fastness.
Innovation Solution
A set of compositions comprising an ink composition with a pigment, resin particles, and water, and a coating composition with resin particles and water, where the resin particles in the ink composition include urethane, polycarbonate, or (meth)acrylic resins, and the Young's modulus of the dried films is optimized to provide superior feel, texture, and fastness to rubbing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating composition with high Young's modulus is used, then fastness to rubbing is improved, but feel and texture deteriorate
Solution Approach 1:
The invention changes the physical parameter of the coating composition by controlling the Young's modulus to be 50 MPa or less, which is a specific parameter change that simultaneously achieves both fastness to rubbing and good feel/texture. This is done by selecting resins with appropriate mechanical properties and adjusting the composition formulation.
Solution Approach 2:
The invention uses a composite coating composition containing multiple resin types (urethane resin, polycarbonate resin, (meth)acrylic resin, and styrene resin) in specific combinations. This composite approach allows the coating to exhibit both adequate fastness to rubbing and good feel/texture by leveraging the complementary properties of different resin materials.
2Ease of operation
If a coating composition with low Young's modulus is used, then feel and texture are improved, but fastness to rubbing deteriorates
Solution Approach 1:
The invention establishes a lower bound for the Young's modulus parameter (50 MPa or less but not too low) to prevent fastness to rubbing from deteriorating while maintaining good feel and texture. This parameter optimization balances the competing requirements.
Solution Approach 2:
The composite coating composition uses specific ratios of different resin types to achieve the optimal Young's modulus range. The combination of urethane, polycarbonate, (meth)acrylic, and styrene resins creates a material that provides both tactile comfort and rubbing resistance.
3Reliability
If resin particles amount in ink composition is increased, then adhesion and fastness are improved, but texture and feel deteriorate
Solution Approach 1:
The invention optimizes the concentration parameter of resin particles in the ink composition, specifying an amount of 1 to 5 parts by mass per part by mass of pigment. This parameter optimization ensures adequate adhesion and fastness while preventing excessive resin buildup that would degrade texture and feel.
Solution Approach 2:
The ink composition uses a composite resin system containing urethane, polycarbonate, (meth)acrylic, and styrene resins in balanced proportions. This composite approach provides sufficient adhesion and fastness through the combined resin matrix while maintaining good texture and feel by avoiding dominance of any single resin type.
Data Source
AI summary
A set of compositions for ink jet textile printing includes an ink composition and a coating composition, the ink composition containing a pigment, resin particles, and water, and the coating composition containing resin particles and water. The resin particles contained in the ink composition contain any of a urethane resin, a polycarbonate resin, an acrylic resin, and a styrene resin. The amount of the resin particles in the ink composition is from 1 to 5 parts by mass on a solids basis per part by mass of the pigment on a solids basis. The Young's modulus of dried film of the ink composition is from 1 to 25 MPa, and that of dried film of the coating composition is 50 MPa or less and higher than that of dried film of the ink composition.