High Chroma Flakes Liquid Coating Adhesion
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Solution Overview
Problem
Current methods for manufacturing optical devices like flakes and foils for security features are costly, require complex equipment, and result in poor quality pigments due to limited material options and poor interlayer adhesion.
Innovation Solution
The development of an article comprising a reflector with selective light modulator layers and absorber layers, where at least one of the selective light modulator layers is deposited using a liquid coating process, allowing for a wider range of materials and improved optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vapor deposition processes are used to manufacture flakes, then optical properties can be achieved, but the equipment becomes expensive and complex
Solution Approach 1:
The patent changes the deposition method from vapor deposition to liquid coating, fundamentally altering the physical state and application method of the coating material. This parameter change eliminates the need for complex vacuum deposition equipment while achieving comparable or superior optical properties through liquid-phase processing
Solution Approach 2:
The patent replaces the mechanical vapor deposition system with a liquid coating system, substituting a complex mechanical vacuum process with a simpler liquid application method. This substitution maintains optical functionality while dramatically reducing equipment complexity and cost
2Reliability
If vapor deposition processes are used to manufacture flakes, then optical properties can be achieved, but manufacturing cost increases
Solution Approach 1:
The patent changes the deposition method from vapor deposition to liquid coating, fundamentally altering the physical state and application method of the coating material. This parameter change eliminates the need for expensive vacuum deposition equipment while achieving comparable or superior optical properties through liquid-phase processing
Solution Approach 2:
The patent employs liquid coating materials that can be applied using simple, inexpensive equipment rather than expensive vacuum deposition systems. The liquid coating approach uses readily available materials and equipment that are significantly cheaper than vapor deposition systems
3Ease of manufacture
If polymer thin films are deposited by evaporation, then films can be formed, but interlayer adhesion becomes poor
Solution Approach 1:
The patent changes the deposition method from evaporation to liquid coating, allowing the coating to be applied in liquid form and then cured. This process enables better penetration into substrate pores and stronger chemical bonding, dramatically improving interlayer adhesion while maintaining ease of manufacture
Solution Approach 2:
The liquid coating process acts as an intermediary that allows the coating material to penetrate and bond with the substrate before curing. This liquid phase enables the coating to flow into substrate pores and form strong mechanical and chemical bonds, solving the adhesion problem inherent in evaporative methods
4Reliability
If vacuum deposition is used, then optical films can be deposited, but productivity decreases due to maintenance time
Solution Approach 1:
The patent replaces the mechanical vacuum deposition system with a liquid coating system, substituting a complex mechanical vacuum process with a simpler liquid application method. This substitution maintains optical functionality while dramatically reducing equipment complexity and maintenance requirements
Solution Approach 2:
The liquid coating process allows for continuous operation without the need for vacuum chamber pumping and venting cycles. The coating can be applied continuously in ambient conditions, eliminating non-productive maintenance time and significantly improving equipment productivity
5Ease of manufacture
If vapor deposition is used, then films can be deposited, but material selection is limited to materials that can be vaporized under low pressure
Solution Approach 1:
The patent changes the deposition method from vapor phase to liquid phase, allowing the use of materials that cannot be vaporized under low pressure. This parameter change expands material selection to include organic materials, polymers, and other substances that are stable in liquid form but decompose before vaporizing, dramatically increasing adaptability
Solution Approach 2:
The liquid coating method allows different materials to be applied in different layers with precise control over each layer's composition. This enables the use of diverse materials including organics and polymers in specific locations within the multilayer structure, enhancing material versatility while maintaining manufacturing simplicity
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 enables the production of high-quality optical devices with enhanced optical interference effects, improved interlayer adhesion, and the use of a broader range of materials, including organic materials, thus overcoming the limitations of existing methods.
Implementation Method 1
enhanced optical interference effects
Implementation Method 2
a reflector having a first surface and a second surface opposite the first surface
Implementation Method 3
a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer
Data Source
AI summary
An article including a reflector having a first surface and a second surface opposite the first surface; a first selective light modulator layer external to the first surface of the reflector; a second selective light modulator layer external to the second surface of the reflector; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein each of the first and second selective light modulator layers include a host material is disclosed herein. Methods of making the article are also disclosed.