Solvent-Tuned Nonaqueous Inkjet Ink Composition for Vinyl Printing
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Solution Overview
Problem
Existing nonaqueous inkjet ink compositions face challenges in achieving excellent solid filling property, anti-mottling property, ink stability, discharge stability, and scratch resistance, particularly when printed at high speeds on vinyl-based polymers used in large billboards.
Innovation Solution
A nonaqueous inkjet ink composition comprising specific constituents such as acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, including propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate, with controlled proportions to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional nonaqueous inkjet ink compositions are used, then the ink can be applied to vinyl-based polymers, but the solid filling property and anti-mottling property are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the organic solvent system by incorporating specific proportions of propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate. This parameter modification enables the ink to achieve both excellent solid filling property and anti-mottling property while maintaining ink stability on vinyl-based polymer substrates.
2Reliability
If conventional nonaqueous inkjet ink compositions are used, then the ink can be applied to vinyl-based polymers, but the discharge stability and scratch resistance are poor
Solution Approach 1:
The patent creates a composite ink formulation by combining acrylic-based resin as the binder with a specifically designed organic solvent system containing propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate. This composite material approach achieves both discharge stability and scratch resistance simultaneously.
3Productivity
If higher printing speeds are implemented, then productivity increases, but fine print reproducibility and solid filling property deteriorate
Solution Approach 1:
The patent modifies the viscosity and surface tension parameters of the ink by adjusting the organic solvent composition. The specific combination of propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate creates an ink formulation that maintains stable droplet formation and proper wetting characteristics even at higher printing speeds, thereby preserving fine print reproducibility.
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 demonstrates good scratch resistance, fine writing property, solid filling property, anti-mottling property, and discharge stability, ensuring high-quality printing on vinyl-based polymers.
Implementation Method 1
Nonaqueous inkjet ink compositions must use materials having good wettability, drying property, fixing property, etc., on the polyvinyl chloride, ethylene-vinyl acetate-based copolymer, and other vinyl-based polymers being the top face materials of the composite sheets.
Implementation Method 2
Nonaqueous inkjet ink compositions must use materials having good wettability, drying property, fixing property, etc.
Data Source
AI summary
An object is to provide a nonaqueous inkjet ink composition offering excellent solid filling property and anti-mottling property, as well as excellent ink stability, discharge stability, and scratch resistance, even when printed at high speed on printing targets whose printing face is constituted by a polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymer, etc. As a solution, a nonaqueous inkjet ink composition is provided that contains acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, wherein the organic solvent comprises propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate, and alumina is contained by 5 to 30 parts by mass relative to 100 parts by mass representing the total of organic coloring pigment and carbon black.