Ink Cartridge Metallic Component Surface Iron Oxidation Control
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Solution Overview
Problem
Water-based inks containing copper phthalocyanine-based dyes and triazole-based compounds for ink-jet recording suffer from precipitation issues when coming into contact with metallic components, leading to discharge failures due to clogging of filters in ink-jet recording apparatuses.
Innovation Solution
The concentration of iron-oxidized components on the contact surface of metallic components within the ink cartridge is limited to no more than 5 atomic percent, preventing the formation of copper-benzotriazole complexes that cause precipitation, and alternative coatings like resin, chromium plating, or nickel plating can be used to avoid iron-oxidized components altogether.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-based ink containing copper phthalocyanine-based dye and triazole-based compound is used, then ozone resistance and rust-preventing property are enhanced, but precipitation is generated when contacting metallic components
Solution Approach 1:
The patent applies local quality by controlling the iron-oxidized component concentration specifically at the contact surface of metallic components (not throughout the entire component) to be not more than 5 atomic %, while allowing the bulk material to maintain its structural properties. This localized control prevents precipitation at the ink-metal interface without compromising the overall functionality of the metallic component.
Solution Approach 2:
The patent changes the chemical composition parameter of the metallic component's contact surface by limiting the iron-oxidized component concentration to not more than 5 atomic %. This parameter change fundamentally alters the chemical interaction between the metallic surface and the ink, preventing the formation of copper-benzotriazole complexes that cause precipitation, while still allowing the ink to maintain its ozone resistance and rust-preventing properties.
2Strength
If conventional metallic components are used in ink cartridge, then structural strength is maintained, but filter clogging occurs due to precipitation
Solution Approach 1:
The patent applies local quality by modifying only the contact surface of metallic components where ink interacts, controlling the iron-oxidized component concentration at this specific location to prevent precipitation. The bulk material retains its original structural strength, while the surface composition is optimized to ensure reliable ink discharge without filter clogging.
Solution Approach 2:
The controlled iron-oxidized component concentration on the metallic surface acts as an intermediary layer that mediates the interaction between the ink and the metallic component. By limiting this surface composition, it prevents harmful chemical reactions that lead to precipitation and filter clogging, while still allowing the metallic component to provide its structural support function.
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
This approach effectively suppresses the generation of precipitation, ensuring stable ink discharge and maintaining the ozone resistance and rust-preventing properties of the water-based ink, as demonstrated by improved filtration rates and ozone resistance tests.
Implementation Method 1
a precipitation (a deposit) is generated by making the water-based ink come contact with a metallic component or metallic member used for the ink cartridge
Data Source
AI summary
An ink cartridge including:a water-based ink for ink-jet recording which contains a dye represented by a general formula (1), a triazole-based compound, and water; anda metallic component which has a contact surface contacting with the water-based ink, a concentration of a iron-oxidized component at the contact surface being not more than 5 atomic %wherein, in the general formula (1),Pc (Cu) represents a copper phthalocyanine nucleus represented by a general formula (Pc).