Continuous Inkjet Ink Composition Storage Stability
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Solution Overview
Problem
Conventional continuous inkjet ink compositions with pigments have inferior storage stability and anticorrosion effects on metal members compared to dye-based compositions, affecting image quality.
Innovation Solution
Incorporating a specific combination of conductivity-imparting agents, such as metal salts of thiocyanic acid and tetraalkylammonium hexafluorophosphate, along with a polydimethylsiloxane compound, into the ink composition to enhance storage stability and anticorrosion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pigment-based continuous inkjet ink composition is used, then printing capability is achieved, but storage stability deteriorates compared to dye-based compositions
Solution Approach 1:
The invention changes the chemical parameters of the ink composition by introducing a specific conductivity-imparting agent (sodium thiocyanate) at controlled concentrations (0.01-5% by mass). This parameter change stabilizes the pigment dispersion and prevents aggregation during storage, thereby improving storage stability without compromising printing capability
Solution Approach 2:
The invention creates a composite ink composition by combining pigment particles, binder resin, and a specifically formulated conductivity-imparting agent system. This composite structure ensures both the colorant functionality of pigments and the storage stability typically associated with dye-based systems
2Reliability
If a pigment-based continuous inkjet ink composition is used, then printing capability is achieved, but anticorrosion effect on metal members deteriorates
Solution Approach 1:
The conductivity-imparting agent (sodium thiocyanate) acts as an intermediary substance that forms a protective interface between the pigment-based ink and metal members. This intermediary layer prevents direct contact between corrosive components and the metal surface, thereby providing anticorrosion protection
Solution Approach 2:
The invention converts the potentially harmful corrosive effects of pigment-based inks into a beneficial protective mechanism. The conductivity-imparting agent transforms the chemical environment at the metal surface, converting what would be corrosive conditions into a protective state that prevents metal degradation
3Stability of the object's composition
If conductivity-imparting agents are added to improve storage stability, then storage stability improves, but image quality may deteriorate
Solution Approach 1:
The invention precisely controls the concentration parameters of the conductivity-imparting agent within optimal ranges (0.01-5% by mass). This parameter optimization ensures sufficient storage stability while maintaining image quality by preventing both under-conduction (which would harm storage) and over-conduction (which would harm image quality)
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 modified ink composition achieves excellent storage stability, anticorrosion effects on metal members, and maintains good image quality during printing.
Implementation Method 1
a metal salt of thiocyanic acid at 0.05 to 1.7% by mass in the composition, and tetraalkylammonium hexafluorophosphate at 0.05 to 2.7% by mass in the composition
Data Source
AI summary
An object is to provide a continuous inkjet ink composition that has excellent storage stability and anticorrosion effect on a metal member, and that allows printing with good image quality. As a solution, a continuous inkjet ink composition is provided that includes a pigment, a resin, a metal salt of thiocyanic acid at 0.05 to 1.7% by mass in the composition, and tetraalkylammonium hexafluorophosphate at 0.05 to 2.7% by mass in the composition.