Water-Based Ink Formulation for High-Speed Plain Paper Printing
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Solution Overview
Problem
Ink-jet printing technologies face challenges in achieving high printing speed on plain paper due to issues with ink permeability, vaporization characteristics, and resin material deterioration, particularly when using diethylene glycol n-hexyl ether (DEGHE) as a penetrant, which can cause nozzle clogging, ink adhesion, and resin degradation.
Innovation Solution
A water-based ink for ink-jet recording is developed, containing diethylene glycol n-hexyl ether (DEGHE) as a penetrant, blended with an acetylene glycol-based surfactant and sodium polyoxyethylene alkyl ether sulfate, at specific ratios to enhance permeability, vaporization characteristics, and water repellence, preventing resin material deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large amount of DEGHE is added to the ink, then the permeability is enhanced, but the vaporization characteristic deteriorates causing solidification and nozzle clogging
Solution Approach 1:
The patent optimizes the concentration parameter of DEGHE within a specific range (0.05-1.00% by weight) and adjusts surfactant concentrations to achieve the desired balance between permeability and vaporization characteristics, preventing both insufficient penetration and excessive solidification
Solution Approach 2:
The patent combines DEGHE with specific surfactants (acetylene glycol-based surfactant and sodium polyoxyethylene alkyl ether sulfate) in defined ratios to create a composite ink formulation that achieves synergistic effects, improving permeability while maintaining vaporization characteristics and preventing nozzle clogging
2Quantity of substance
If a large amount of DEGHE is added to the ink, then the permeability is enhanced, but ink adhesion to resin casing increases causing staining and material deterioration
Solution Approach 1:
The patent controls the concentration of DEGHE within a specific range and adjusts the surfactant ratios to modify the ink's interaction with resin materials, reducing adhesion and staining while maintaining sufficient permeability
Solution Approach 2:
The patent introduces surfactants as intermediary substances that mediate between the ink components and the resin casing, reducing the harmful adhesion effects of DEGHE on resin materials while maintaining the permeability benefits
3Quantity of substance
If DEGHE is used as penetrant, then the permeating power is improved, but water solubility is poor limiting the amount that can be added
Solution Approach 1:
The patent creates a composite formulation combining DEGHE with water-soluble surfactants, achieving sufficient permeating power while maintaining overall water solubility of the ink composition through the synergistic interaction of components
4Quantity of substance
If DEGHE is used as penetrant, then the permeability is enhanced, but water repellence decreases causing ink to adhere to ink cartridge wall surface
Solution Approach 1:
The patent optimizes the concentration of DEGHE and adjusts the surfactant composition to achieve the right balance between permeability enhancement and water repellence, preventing excessive adhesion to the ink cartridge wall surface
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 achieves excellent ink permeability, vaporization characteristics, and water repellence, reducing nozzle clogging and resin degradation, while allowing for efficient ink usage and easy cleaning of ink cartridges.
Implementation Method 1
The permeability of the ink can be enhanced by adding a penetrant to the ink. For example, an ink has been suggested, in which diethylene glycol n-hexyl ether (DEGHE) is used as the penetrant
Implementation Method 2
the surfactant includes an acetylene glycol-based surfactant (B1) and sodium polyoxyethylene alkyl ether sulfate (B2)
Implementation Method 3
the vaporization characteristic of the ink is deteriorated to cause the solidification of the ink
Data Source
AI summary
A water base ink for ink-jet recording contains a coloring agent, water, a penetrant, and a surfactant, wherein the penetrant includes diethylene glycol n-hexyl ether (A), the surfactant includes an acetylene glycol-based surfactant (B1) and sodium polyoxyethylene alkyl ether sulfate (B2), and (A), (B1), and (B2) are blended at ratios respectively to fulfill a predetermined condition. Accordingly, the water base ink for ink-jet recording is provided, which is excellent in the permeability, the vaporization characteristic, and the water repellence and which does not deteriorate any resin material forming a casing or the like of an ink jet recording apparatus.