Inkjet Ink pH Stabilization via Amine Buffering
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Solution Overview
Problem
Inkjet ink pH shifts to acidity due to corrosive substances, leading to erosion of head nozzle members and non-ejection of ink, which existing anti-rust materials fail to prevent effectively.
Innovation Solution
A non-water-based inkjet ink containing an amine compound, specifically an alcohol amine, is used as a pH adjuster to prevent pH shifts to acidity, thereby preventing erosion of the head nozzle member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anti-rust material such as benzotriazole is added to form a protective layer on the head nozzle member, then the erosion of the head nozzle member is prevented, but the pH of the ink cannot be prevented from shifting to the acidity side
Solution Approach 1:
A buffer agent is introduced as an intermediary substance to control and stabilize the pH of the ink. The buffer agent acts as a mediator between the corrosive substances generated by ink deterioration and the head nozzle member, preventing pH shifts to acidity while the anti-rust material continues to provide protective layer formation on the nozzle surface.
Solution Approach 2:
The ink composition is formulated as a composite system combining multiple functional components: colorant, solvent, anti-rust material (such as benzotriazole), and buffer agent. This composite approach allows simultaneous achievement of nozzle protection through anti-rust material and pH stability through buffer agent, resolving the contradiction between these two functions.
2Stability of the object's composition
If corrosive substances are generated due to ink deterioration and resin degradation, then the pH of the ink shifts to the acidity side, but this causes erosion of the head nozzle member and non-ejection of ink
Solution Approach 1:
The buffer agent is added in advance to the ink formulation to preemptively counteract the pH-shifting effect of corrosive substances before they can cause damage. This preliminary protective action maintains pH stability even when corrosive substances are generated during ink storage and use, preventing the chain reaction that leads to nozzle erosion and ejection failure.
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 inkjet ink effectively stabilizes the pH, preventing erosion of the head nozzle member and ensuring stable ink ejection over long periods of continuous use.
Implementation Method 1
an amine compound is added as a pH adjuster
Implementation Method 2
the pH of the ink is shifted to the acidity side due to corrosive substances
Implementation Method 3
an anti-rust material such as benzotriazole is added into the ink so that it adsorbs onto the surface of the head nozzle member so as to form a protective layer for preventing the erosion of the head nozzle member
Data Source
AI summary
An inkjet ink containing a colorant, where an amine compound is added as a pH adjuster. The ink is capable of preventing the pH of the ink from being shifted to the acidity side due to corrosive substances (e.g., acid substances) generated by deterioration of ink, adverse effects due to water absorption and moisture absorption, or degradation of resin (e.g., degradation of vinyl chloride-vinyl acetate copolymer resin), thus preventing erosion of a head nozzle member.