Dual-Layer Electronic Metal Card Interlaying Method
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Solution Overview
Problem
Existing methods for creating metal cores for dual-layer electronic metal payment cards compromise card integrity and longevity while increasing material requirements due to complex designs and the use of additional coatings or primers.
Innovation Solution
A method involving the overlaying of a metal layer with apertures onto a film layer to form a pre-laminated structure, which is then heated and cured with polymer applied within the apertures, minimizing excess polymer and maximizing metal content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a primer or coating is used to bond card layers, then bonding integrity is improved, but card thickness increases and metal composition percentage decreases
Solution Approach 1:
The patent removes the primer layer from the card construction entirely. Instead of using a primer coating, the invention directly bonds the metal foil to the plastic substrate using adhesive applied to the plastic surface, eliminating the intermediate primer layer that caused thickness and reduced metal content.
Solution Approach 2:
The patent merges the bonding function into a single adhesive layer applied directly to the plastic substrate, combining what were previously separate primer and bonding layers into one integrated adhesive system, thereby reducing total material thickness while maintaining bonding integrity.
2Strength
If a primer or coating is used to bond card layers, then bonding integrity is improved, but metal composition percentage decreases
Solution Approach 1:
The patent removes the primer layer from the card construction entirely. Instead of using a primer coating, the invention directly bonds the metal foil to the plastic substrate using adhesive applied to the plastic surface, eliminating the intermediate primer layer that caused thickness and reduced metal content.
3Length of stationary object
If liquid primers are used for bonding and lamination, then card thickness is reduced, but outer layers can delaminate at high temperatures and humidities
Solution Approach 1:
The patent changes the chemical composition parameters of the bonding system by replacing liquid primers with a specific adhesive formulation that has different thermal and moisture resistance properties, allowing the card to maintain layer stability under high temperature and humidity conditions while keeping thin construction.
Solution Approach 2:
The patent uses a composite adhesive system that combines multiple materials with complementary properties - including thermoplastic adhesive and potential metal foils - to create a bonding system that provides both thin construction and high-temperature/humidity resistance, overcoming the limitations of liquid primers alone.
4Length of stationary object
If thinner coatings are used to minimize card thickness, then card thickness is reduced, but coating functionality is compromised requiring replacement cards
Solution Approach 1:
The patent changes the chemical composition parameters of the bonding system by replacing liquid primers with a specific adhesive formulation that has different thermal and moisture resistance properties, allowing the card to maintain layer stability under high temperature and humidity conditions while keeping thin construction.
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 method enhances the longevity and integrity of electronic metal payment cards by reducing material waste and maintaining a higher metal composition percentage, thus optimizing weight and tactile/audial properties.
Implementation Method 1
The pre-laminated structure is placed onto a heating plate. An amount of heat is applied to the pre-laminated structure via the heating plate.
Implementation Method 2
A negative pressure is applied to the pre-laminated structure via the at least one channel to secure the pre-laminated structure to the heating plate.
Implementation Method 3
The at least one aperture is filled with a polymer. The polymer is subsequently cured.
Data Source
AI summary
A method of interlaying a metal core for a dual-layer electronic metal payment card. The metal core includes a metal layer having one or more openings formed therein (such as to receive a payment module or another electronic component or aesthetic feature). To interlay the metal core, the metal layer is laminated with a heat activated film layer and a release liner, and the laminated structure is subsequently placed on a heating plate. A polymer is applied only to the one or more openings. Using a containment structure placed over the metal core layer and a combination of heat, vacuum pressure, and pressurized inert gas, the method includes adhering and curing the polymer to the heat activated film to complete the lamination process. After curing, excess polymer is removed via a finishing edge (such as a grinder, a sander, a milling machine, or as similar edge).