Inkjet Metal Powder Surface Modification for Glossy Appearance
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Solution Overview
Problem
Conventional methods for producing decorative products with a glossy appearance, such as metallic plating and inkjet printing, face challenges in forming fine patterns and applying to curved surfaces, and inkjet compositions using metal powders suffer from poor storage and discharge stability due to increased viscosity and gelation issues.
Innovation Solution
A composition for inkjet is developed using metal powders with surfaces modified by fluorinated silane or phosphate compounds, combined with an organic solvent and binder resin, which enhances discharge and storage stability while maintaining the glossy appearance of metal powders, allowing for effective application on curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal powder is used in inkjet composition to achieve glossy appearance, then the glossy appearance is improved, but storage stability and discharge stability deteriorate due to increased viscosity and gelation
Solution Approach 1:
A surface preparation agent is introduced as an intermediary substance between the metal powder particles and the inkjet composition medium. This agent modifies the metal powder surface to reduce interparticle interactions that cause gelation, thereby maintaining glossy appearance while improving storage and discharge stability
Solution Approach 2:
The surface properties of metal powder are changed through chemical or physical modification using a surface preparation agent. This alters parameters such as surface energy, wettability, and interparticle friction, reducing viscosity increase and gelation while preserving the reflective properties needed for glossy appearance
2Illumination intensity
If conventional metallic plating or stamp-printing is used to achieve glossy appearance, then the glossy appearance is improved, but the ability to form fine patterns and apply to curved surfaces deteriorates
Solution Approach 1:
The invention replaces mechanical deposition methods (plating, stamp-printing) with an inkjet printing system that uses modified metal powder suspensions. This substitution enables precise digital patterning and application to complex curved surfaces while maintaining metallic glossy appearance through controlled droplet deposition
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 inkjet composition achieves excellent discharge and storage stability, enabling the production of recording materials with high glossy appearance and abrasion resistance, suitable for decorative products on various surfaces.
Implementation Method 1
The surface of the metal powder is modified by chemical bonding with a fluorinated silane composition and/or a fluorinated phosphate compound as a surface preparation agent
Data Source
AI summary
A composition for inkjet is adapted to be discharged by an inkjet method. The composition includes a metal powder having a surface, metal or metal alloy constituting at least the surface of the metal powder, an organic solvent, and a binder resin. The surface of the metal powder is modified by chemical bonding with a fluorinated silane composition and/or a fluorinated phosphate compound as a surface preparation agent.