Pigment Flake Layer Structure Using Liquid Coating Instead of Vacuum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing flakes and foils for security features in currency are expensive, require complex equipment, and limit the use of materials to those that can be vaporized under low pressure, resulting in poor quality pigments and interlayer adhesion issues, along with productivity losses due to vacuum processing and maintenance challenges.
Innovation Solution
A multi-layered structure comprising metallic and dielectric layers, including a photo-initiator, oxygen inhibition mitigation composition, leveling agent, and defoamer, deposited using a liquid coating process, which allows for improved optical properties and material flexibility, enabling the use of a wider range of materials and reducing equipment complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vapor deposition processes are used to manufacture flakes and foils, then metallic layers can be deposited, but the equipment becomes expensive and complex
Solution Approach 1:
The patent replaces vapor deposition (a physical/vacuum-based process) with a liquid coating process. This substitution eliminates the need for complex vacuum equipment while achieving comparable metallic layer deposition quality through liquid application methods followed by drying or curing.
2Reliability
If vapor deposition processes are used, then metallic layers can be formed, but productivity decreases due to vacuum processing and maintenance time
Solution Approach 1:
The liquid coating process replaces time-consuming vacuum cycling operations with a continuous liquid application and drying process, eliminating non-productive pumping and venting time while maintaining metallic layer quality.
Solution Approach 2:
The liquid coating process allows for continuous production without the intermittent vacuum cycling required by vapor deposition, maintaining productive action throughout the coating process and eliminating maintenance-related downtime.
3Adaptability or versatility
If vapor deposition is used, then materials can be deposited, but only materials that can be vaporized under low pressure are available
Solution Approach 1:
The patent changes the deposition parameter from vapor phase to liquid phase, allowing organic materials and other substances that cannot be vaporized under low pressure to be deposited as liquid coatings, expanding material selection while maintaining quality through controlled drying or curing processes.
4Shape
If polymer thin films are deposited by evaporation, then films can be formed, but interlayer adhesion is poor
Solution Approach 1:
The patent replaces evaporation-based film deposition with liquid coating followed by drying or curing, which allows for better interlayer adhesion through liquid-state wetting and bonding mechanisms before solidification, while still achieving the desired film formation.
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 solution provides high-quality flakes and foils with enhanced optical properties, such as goniochromaticity and high flop, while reducing production costs and equipment maintenance, enabling the use of organic materials and improving productivity.
Implementation Method 1
The dielectric layer includes at least one of (i) a photo-initiator, (ii) an oxygen inhibition mitigation composition, (iii) a leveling agent, and (iv) a defoamer
Data Source
AI summary
An article including at least one first metallic layer, at least one dielectric layer, and at least one second metallic layer is disclosed. The at least one dielectric layer can include at least one of (i) a photo-initiator, (ii) an oxygen inhibition mitigation composition, (iii) a leveling agent, and (iv) a defoamer. The article can be in the form of a foil or pigment flake, and can also include a magnet containing layer.