Non-aqueous Inkjet Ink Composition for High-Speed Printing
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Solution Overview
Problem
Conventional non-aqueous inkjet ink compositions face issues with insufficient solid fill, poor discharge stability, mottling, and ink solidification in waste tubes, especially when used for high-speed printing on polyvinyl chloride and ethylene-vinyl acetate copolymer surfaces, leading to maintenance problems and reduced performance.
Innovation Solution
A non-aqueous inkjet ink composition is developed using a blend of diethylene glycol dialkyl ether and propylene carbonate as organic solvents, combined with acrylic and ketone resins, which improves wettability, fixing properties, and discharge stability, while maintaining a high flash point and preventing clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional non-aqueous inkjet ink compositions are used for high-speed printing, then printing speed is improved, but solid fill property deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the ink composition by specifying precise proportions of diethylene glycol dialkyl ether (40-80 mass%) and propylene carbonate (5-25 mass%), along with binder resin (5-30 mass%) and pigment (5-30 mass%). This parameter optimization enables the ink to maintain proper viscosity and flow characteristics at high printing speeds while ensuring complete solid fill without white spots or mottling.
2Productivity
If conventional non-aqueous inkjet ink compositions are used for high-speed printing, then printing speed is improved, but discharge stability deteriorates
Solution Approach 1:
The patent optimizes the solvent system parameters by combining diethylene glycol dialkyl ether and propylene carbonate in specific ratios, which maintains ink discharge stability even at high printing speeds. The binder resin composition (acrylic resin 30-70 mass% and ketone resin 30-70 mass%) further stabilizes the ink formulation, preventing discharge irregularities.
3Ease of manufacture
If conventional non-aqueous inkjet ink compositions are used, then ease of manufacture is improved, but fine print reproducibility deteriorates
Solution Approach 1:
The patent achieves fine print reproducibility by precisely controlling the chemical parameters of the ink components. The specific ratio of diethylene glycol dialkyl ether to propylene carbonate, combined with optimized binder resin and pigment concentrations, ensures that fine text and detailed patterns are reproduced clearly without blurring or distortion.
4Ease of manufacture
If conventional non-aqueous inkjet ink compositions are used, then ease of manufacture is improved, but anti-mottling property deteriorates
Solution Approach 1:
The patent prevents mottling by optimizing the solvent composition parameters. The combination of diethylene glycol dialkyl ether and propylene carbonate in the specified ratio ensures uniform ink distribution and drying, preventing the formation of mottled patterns on the printed surface.
5Ease of operation
If ink remains in printer for extended period, then ease of operation is improved, but reliability deteriorates due to clogging
Solution Approach 1:
The patent improves resolubility of dried coating films by adjusting the chemical parameters of the ink formulation. The specific solvent combination and ratio enable dried ink to remain soluble, preventing clogging in the waste tube even when ink remains in the printer for extended periods.
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 excellent fine print reproducibility, solid fill, anti-mottling properties, and enhanced rub and solvent resistance, along with improved discharge stability and resolubility of dried coating films, effectively addressing the limitations of previous inkjet inks.
Implementation Method 1
Non-aqueous inkjet ink compositions require use of materials having good wettability, drying property, fixing property, etc., with respect to polyvinyl chloride polymers, ethylene-vinyl acetate copolymers, and other vinyl polymers that are used as the surface materials for composite sheets.
Implementation Method 2
by blending acrylic resin and ketone resin as a binder
Data Source
AI summary
An object is to provide a non-aqueous inkjet ink composition which offers excellent fine print reproducibility, solid fill property, and anti-mottling property on printed matters, even when it is printed, at high speed, on materials whose printing surface is constituted by a polyvinyl chloride polymer, ethylene-vinyl acetate copolymer, or other vinyl polymer, etc., and which also offers excellent rub resistance, solvent resistance, discharge stability, and resolubility of dried coating film, and has a high flash point. To achieve the object, a non-aqueous inkjet ink composition is provided which contains an acrylic resin, a ketone resin, a pigment, and a pigment dispersant, as well as propylene carbonate and diethylene glycol alkyl ether as an organic solvent.