Inkjet Liquid Composition Corrosion Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink-jet printing technologies face challenges with corrosion of liquid ejection heads due to aqueous inks, leading to deterioration and electrolysis issues, and existing protective films suffer from quality variations, cracks, and increased production costs.
Innovation Solution
A liquid composition containing specific compounds represented by formulas (1) and (2) is used to form a protective film that enhances insulating properties for liquid ejection heads, preventing corrosion and electrolysis by orienting carboxy groups to create a dense protective layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating material is applied to the pressure-generating member to prevent corrosion, then corrosion resistance is improved, but manufacturing complexity and production cost increase
Solution Approach 1:
The ink composition itself contains corrosion-inhibiting components that actively protect the pressure-generating member without requiring external coating applications. The composition performs the protective function through its chemical constituents, eliminating the need for separate coating processes and reducing manufacturing complexity while maintaining corrosion resistance
Solution Approach 2:
The invention changes the chemical parameters of the ink composition by incorporating specific corrosion-inhibiting substances and controlling pH levels, thereby altering the corrosivity parameters of the ink to protect the pressure-generating member without requiring structural modifications or coating applications
2Reliability
If a protective film is formed on the liquid ejection head, then insulating properties are improved, but the protective film may develop cracks and quality variations
Solution Approach 1:
The liquid composition forms a protective film through self-assembly of its molecular components when applied to the liquid ejection head. This self-forming mechanism eliminates manual coating processes that cause quality variations and cracks, resulting in more consistent film formation while maintaining insulating properties
Solution Approach 2:
The invention uses a composite ink composition containing multiple functional components including corrosion inhibitors, surfactants, and polymers that work together to form a robust protective film. This composite approach creates a more durable and uniform film structure compared to single-component coatings, reducing cracks and quality variations
3Ease of manufacture
If aqueous ink composition is used for printing, then printability and cost are improved, but corrosion and electrolysis of the liquid ejection head occur
Solution Approach 1:
The invention converts the inherently corrosive aqueous ink composition into a protective medium by adding corrosion-inhibiting components. The same aqueous base that causes corrosion is modified to actively protect the pressure-generating member, turning a harmful factor into a beneficial protective environment while maintaining low cost and good printability
Solution Approach 2:
The invention changes the chemical parameters of the aqueous ink by controlling pH levels and adding corrosion-inhibiting substances, thereby altering the corrosivity parameters while maintaining the aqueous nature of the ink. This allows the ink to remain cost-effective and printable while eliminating corrosion and electrolysis problems
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 effectively forms a protective film that inhibits corrosion and electrolysis, improving the insulating properties and durability of liquid ejection heads, thereby reducing maintenance costs and ensuring high-definition image production.
Implementation Method 1
orienting carboxy groups to create a dense protective layer
Implementation Method 2
ejecting the liquid composition for ink-jet printing from a liquid ejection head of an ink-jet type including an ejection energy-generating element
Data Source
Figure 1~2
AI summary
The present invention relates to a liquid composition for ink-jet printing which is capable of forming a protective film on a liquid ejection head of an ink-jet type to enhance insulating properties for the liquid ejection head, an image-forming method, a method of forming the protective film, a storing method, and a use of the liquid composition. The present invention provides [1] a liquid composition for ink-jet printing which contains not less than 0.01% by mass and not more than 1.50% by mass of a compound represented by the following formula (1) or a salt thereof, not less than 0.05% by mass and not more than 35% by mass of a compound represented by the following formula (2), and water, [2] an ink-jet image-forming method including the step of ejecting the liquid composition for ink-jet printing according to the above [1] from a liquid ejection head of an ink-jet type including an ejection energy-generating element to form characters or images, [3] a method of forming a protective film on a liquid ejection head of an ink-jet type including an ejection energy-generating element, including the step of applying a voltage to the ejection energy-generating element under such a condition that the ejection energy-generating element is allowed to contact with the liquid composition according to the above [1], [4] a method of storing a liquid ejection head of an ink-jet type including an ejection energy-generating element, including the steps of applying a voltage to the ejection energy-generating element under such a condition that the ejection energy-generating element is allowed to contact with the liquid composition according to the above [1], and filling the liquid ejection head with an ink after the step of applying a voltage, and [5] a use of the liquid composition according to the above [1], as a filling liquid or an ink; R1-O-(AO)j(CH2CH2O)n-B-COOH (1), and R2-O-(AO)k(CH2CH2O)m- H (2).