Portable Data Carrier Glossy Varnish Binder Delamination
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Solution Overview
Problem
Existing portable data carriers with thick external layers (over 0.5 mm) suffer from delamination issues due to weak adhesive forces between the card body, printing ink layer, and plastic layer, leading to unprotected card bodies.
Innovation Solution
A portable data carrier structure featuring a card body with a chip module and antenna for near-field communication, where a glossy varnish layer acts as a binder between the printing ink and plastic layers, preventing delamination, and a through hole for carrying, with a multi-layer structure and epoxy resin plastic layer for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thick plastic layer (greater than 0.5 mm) is applied to protect the card body, then protection against external influences is improved, but delamination occurs due to weak adhesive forces
Solution Approach 1:
The patent introduces a primer layer as an intermediary substance between the plastic layer and the card body surface. This primer layer specifically enhances adhesive bonding, preventing delamination while allowing the thick plastic layer to provide robust protection against external influences. The primer acts as a mediator that reconciles the conflict between thick protective layers and adhesive stability.
2Reliability
If a glossy varnish layer is applied over the printing ink, then adhesive forces are increased and delamination is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the glossy varnish layer with the primer layer functionality, creating a single integrated layer that serves dual purposes: enhancing adhesive forces to prevent delamination and providing a glossy aesthetic finish. This merging of functions reduces the number of separate manufacturing steps while achieving multiple objectives simultaneously.
3Stability of the object's composition
If the card body structure is made monolithic with integrated layers, then mechanical stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies the primer layer to the card body surface before applying the plastic layer, ensuring optimal adhesion conditions are established in advance. This preliminary action of surface preparation creates a receptive substrate that facilitates precise and reliable layer integration, reducing the overall manufacturing precision burden while achieving monolithic structural stability.
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 a highly stable data carrier with increased adhesive forces, preventing delamination and offering a monolithic structure with minimal manufacturing costs, while allowing for customizable designs and protection against external influences.
Implementation Method 1
The gloss varnish, known in English as gloss oil or varnish, acts as a type of binder after the data carrier has been manufactured, creating adhesive forces that hold the thick plastic layer and the printing ink layer together
Implementation Method 2
a plastic layer is applied to the glossy lacquer layer, the plastic layer being transparent, in other words crystal clear, and having a layer thickness greater than 0.5 mm
Data Source
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AI summary
The invention relates to a portable data carrier having a card body (5), in which a chip module (7) and an antenna (7) for near field communication are accommodated, and a method for the production of the data carrier. Said data carrier, which is a crystal card for example, has an improved mechanical stability.