Metallic Luster Coating for RFID-Transparent Packaging
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Solution Overview
Problem
Existing metal decorative products with metallic luster interfere with electromagnetic wave devices, such as RFID tags, due to reflective or attenuative properties, leading to manufacturing complexities and increased costs when trying to avoid continuous conductor surfaces.
Innovation Solution
A metal decorative product is developed with a metallic luster decoration coated packaging formed using ink mixed with metal powder, where the metal powder and connections are insulated and independent, allowing electromagnetic waves to pass through without affecting device performance, and can be manufactured at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal foil or metal evaporated film is used to form metallic luster decoration, then the metallic luster effect is achieved, but electromagnetic wave reflection and attenuation occur, affecting RFID tag performance
Solution Approach 1:
The continuous metal film is segmented into discrete metal powder particles dispersed in ink. This segmentation breaks the continuous conductive path that causes electromagnetic wave reflection, while still providing metallic luster through the distributed metal particles. The ink matrix acts as an insulator separating the metal particles electrically.
Solution Approach 2:
The invention uses a composite material system consisting of metal powder particles dispersed in an ink matrix. This composite provides both the aesthetic metallic luster (from metal particles) and electromagnetic wave transparency (from the insulating ink matrix), resolving the contradiction between appearance and functionality.
2Reliability
If special evaporation technology or demetallizing process is used to avoid continuous conductor surface, then electromagnetic wave interference is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The invention replaces complex mechanical manufacturing processes (evaporation technology, demetallizing processes, etching) with a simpler printing process. The metallic luster decoration is applied by printing ink mixed with metal powder, which is a conventional, low-cost printing technique rather than requiring specialized vacuum evaporation or chemical etching equipment.
3Illumination intensity
If metal foil or metal evaporated film is used for metallic luster, then high-class feel is achieved, but electromagnetic wave communication is blocked
Solution Approach 1:
The ink matrix serves as an intermediary substance between the substrate and the metal particles. It allows the metal particles to be distributed on the surface for aesthetic effect while simultaneously acting as an insulating layer that prevents direct electrical connection between metal particles, thereby reducing electromagnetic wave reflection.
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 achieves metallic luster while enabling effective communication with electromagnetic wave devices, such as RFID tags, and reduces manufacturing costs by using a substrate like coated paper or resin film with short electrical lengths for metal powder connections.
Implementation Method 1
the metal powder and the metal powder connection formed by the metal powder are separately insulated and independent with each other by using the ink
Implementation Method 2
Metal foil is massively formed on the surface of substrate 101 of a wine packaging (which is a metal decorative product 100) as a metallic luster decoration coated packaging 301
Data Source
Figure 1
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Figure 4
AI summary
A metal decorative product has a metallic luster decoration coated packaging (31) on at least one side of a substrate (11) and encloses a part (20,) disposed with electromagnetic wave device (21, 21'). The metallic luster decoration coated packaging (31) is formed by coating an ink (2) mixed with metal powder (1). In the metallic luster decoration coated packaging (31), the ink (2) is used to make the metal powder (1) and metal powder connection (3) formed by the metal powder insulated and independent from each other.