Composite Payment Card with Metal Particles and Dielectric Coating
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Solution Overview
Problem
Metal payment cards are prone to electrostatic discharge (ESD) issues, which can cause interruptions or damage to access devices, and are costly due to the use of expensive materials and inconsistent manufacturing processes with existing infrastructure.
Innovation Solution
A payment card design incorporating a composite of metal particles, such as tungsten, embedded in a polymer resin with a dielectric coating to reduce conductivity and a laminated structure for aesthetic appeal, manufactured using existing infrastructure to minimize costs and ESD risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If metal cards are used to enhance appearance and feel, then aesthetic appeal is improved, but electrostatic discharge problems occur causing interruptions or damage to access devices
Solution Approach 1:
The patent uses a composite material consisting of metal particles embedded in a polymer resin matrix. This composite provides the metallic appearance and feel desired by customers while the polymer resin acts as an insulator that prevents electrostatic discharge, thus resolving the contradiction between aesthetic appeal and ESD protection
Solution Approach 2:
The patent changes the electrical parameters of the card by incorporating metal particles with specific properties (conductivity, density) into a non-conductive polymer resin. This parameter modification allows the card to achieve metallic characteristics visually and tactually while maintaining electrical insulation to prevent ESD events
2Shape
If expensive metals are used to create aesthetic appeal, then appearance is improved, but manufacturing costs increase
Solution Approach 1:
The patent replaces expensive precious metals with inexpensive metal particles (such as aluminum, iron, or steel particles) embedded in polymer resin. These cheap metal particles provide the desired metallic appearance and feel without the high cost of solid metal cards, effectively applying the principle of using inexpensive materials to achieve the same aesthetic effect
Solution Approach 2:
The patent applies metallic properties locally through metal particles only where needed for aesthetic appearance, rather than using expensive metals throughout the entire card structure. The polymer resin matrix provides the bulk of the card at low cost, while metal particles provide localized metallic visual and tactile qualities
3Ease of manufacture
If new machinery and processing steps are added to manufacture metal cards, then manufacturing capability is improved, but production costs increase
Solution Approach 1:
The patent makes existing polymer card manufacturing equipment multi-functional by enabling it to produce composite cards with metal particles. The same extrusion, injection molding, or lamination equipment used for traditional polymer cards can now also process metal-polymer composites, eliminating the need for separate metal card manufacturing infrastructure
Solution Approach 2:
The patent merges the metal particle reinforcement/aesthetic function with the existing polymer card manufacturing process. By combining inexpensive metal particles with standard polymer materials and processes, the invention creates a unified manufacturing approach that eliminates the need for separate metal card production lines
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 card achieves a metallic appearance and feel without ESD issues, ensuring safe interaction with access devices and reducing manufacturing costs by using tungsten particles with a dielectric coating, thus preventing damage and maintaining transaction integrity.
Implementation Method 1
a polymer resin with a dielectric coating to reduce conductivity
Data Source
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AI summary
Embodiments of the invention relate to payment cards and methods for making payment cards. In one embodiment, a card comprises a first layer and a second layer adjacent to the first layer. The second layer comprises a plurality of particles comprising metal, and the plurality of particles comprise at least about 15 volume % of the second layer. In another embodiment, a mixture is prepared comprising polymer and a plurality of particles comprising metal. The plurality of particles comprise at least about 15 volume % of the mixture. The mixture is pressed and an outer layer is applied. The mixture and outer layer are then cut to form the card.