Ink-Jet Ink for Color Filter Using Cold Curing
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Solution Overview
Problem
Current ink-jet methods for producing color filters face issues such as high VOC production, difficulty in adjusting viscosity, and high energy consumption due to the use of organic solvents and thermal curing processes.
Innovation Solution
An ink-jet ink comprising an aqueous nano pigment dispersion and a cold curing component, which allows for flexible viscosity adjustment and room temperature curing, reducing environmental impact and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic solvents are used as ink media, then the ink can be effectively applied and cured, but a large amount of VOC is produced which brings fire risk and is detrimental to environment and health
Solution Approach 1:
The patent changes the fundamental parameter of the ink media from organic solvent-based to water-based system. This substitution eliminates VOC emissions while maintaining ink functionality through careful selection of water-soluble or dispersible pigments, binders, and additives, thus resolving the contradiction between manufacturing effectiveness and environmental harm
Solution Approach 2:
The patent employs a water-based ink formulation where water acts as a temporary, benign carrier that evaporates completely without harmful residues. This disposable, environmentally friendly medium replaces persistent organic solvents, eliminating fire risks and health hazards while fulfilling the ink's application function
2Reliability
If thermal curing process is used to form pixel filter layer, then the layer is properly cured, but a huge amount of energy is consumed
Solution Approach 1:
The patent replaces the thermal curing mechanism with a chemical curing mechanism. The ink formulation includes reactive components that undergo chemical reactions at room temperature or low temperature to form the cured pixel filter layer, substituting the high-energy thermal process with a low-energy chemical process while maintaining curing quality
Solution Approach 2:
The patent changes the curing temperature parameter from high (thermal curing) to room temperature or low temperature (chemical curing). This parameter change is achieved by incorporating cold curing agents and reactive components in the ink formulation that can polymerize or cross-link without high thermal energy input, thus resolving the energy consumption contradiction
3Force
If resin molecular weight and addition amount are increased to adjust ink viscosity, then the viscosity can be increased, but the adjustment becomes difficult
Solution Approach 1:
The patent introduces multiple adjustable parameters for viscosity control beyond just resin molecular weight and addition amount. These include water content, types and amounts of additives, and composition ratios of different ink components. This multi-parameter approach provides flexible viscosity adjustment while maintaining ink performance, resolving the contradiction between achieving desired viscosity and maintaining adjustment ease
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 solution effectively minimizes VOC emissions, allows for flexible viscosity adjustment independent of resin molecular weight, and reduces energy consumption by enabling room temperature curing, thereby improving the environmental and economic viability of the process.
Implementation Method 1
an ink-jet ink comprising an aqueous nano pigment dispersion and a cold curing component, wherein the cold curing component comprises, 40 to 80 parts by weight of an acrylic ester emulsion containing a first cold curing component and 1 to 20 parts by weight of a second cold curing component
Implementation Method 2
allows for flexible viscosity adjustment and room temperature curing, reducing environmental impact and energy consumption
Data Source
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AI summary
The disclosure provides an ink-jet ink for color filter and a method for preparing the same, as well as a method for preparing of a color filter. The ink-jet ink for color filter comprising, by weight, 10 to 50 parts of aqueous nano pigment dispersion and 51 to 95 parts of a cold curing component.