Laminate Card Assembly With Colorant-Based Core Blocking
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Solution Overview
Problem
Existing laminated cards face issues where the color of the core layer bleeds through to the surface, leading to undesirable visibility changes, and solutions like thick white layers increase cost and complexity or create visible white profiles.
Innovation Solution
A laminate assembly with a top coat layer and adhesive layer that includes colorants to prevent the core layer from being visible, using thin layers and a laminate assembly that incorporates colorants to prevent the core layer from being visible, using thin layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thick white pigmented coating is printed onto the core beneath the surface, then the core color visibility is reduced, but the cost and complexity increase and coupling strength decreases
Solution Approach 1:
A tie coat layer is introduced as an intermediary between the core and the white pigmented coating. This tie coat layer has an adhesion promoter that enhances bonding to the core, while the white pigmented coating provides the color blocking function. This intermediary layer resolves the contradiction by maintaining both the color blocking effect and the coupling strength without requiring a thick coating that would increase complexity.
Solution Approach 2:
The invention changes the parameters of the coating system by using a multi-layer approach with specific thickness controls. The white pigmented coating is applied at a controlled thickness (0.5-5 micrometers) and combined with a tie coat layer, transforming the single thick coating approach into a optimized multi-layer system that reduces complexity while maintaining color blocking effectiveness.
2Object-affected harmful factors
If a thick white polymer layer is added between the core and surface films, then the core color visibility is reduced, but a visible white profile is created in the side view
Solution Approach 1:
The invention changes the thickness parameter of the white layer from thick (which creates visible profile) to thin (0.5-5 micrometers). This thin white pigmented coating is applied only on the surface side of the core, not as a thick bulk layer, thereby blocking core color visibility while maintaining a sleek card profile without visible white edges in the side view.
Solution Approach 2:
The white pigmented coating is applied locally only where needed for color blocking (on the surface-facing side of the core), rather than as a universal thick layer throughout the card structure. This localized application achieves the color blocking function without creating unwanted visible white profiles in the card's side view.
3Object-affected harmful factors
If a thick white pigmented coating is applied, then the core color visibility is reduced, but the coupling between core and surface films weakens
Solution Approach 1:
The tie coat layer serves as a mediator between the core and the white pigmented coating. It contains an adhesion promoter that specifically enhances the bonding interface with the core, ensuring that the coupling strength is maintained or improved while the white pigmented coating provides the color blocking function without compromising the core-surface film attachment.
Solution Approach 2:
The invention uses a composite multi-layer structure consisting of the core, tie coat layer, and white pigmented coating. Each layer has specific properties: the core provides structural base, the tie coat layer provides adhesion enhancement, and the white pigmented coating provides color blocking. This composite structure achieves both color blocking and strong coupling simultaneously.
Data Source
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AI summary
A laminate assembly and method for manufacturing a laminate assembly for a card assembly is provided. The assembly includes a top coat layer, a carrier layer connected with the top coat layer, and a colored core coupled by an adhesive layer. One or more of the adhesive layer or the top coat layer includes a colorant of a second color that is different from the first color of the colored core such that the first color of the colored core less not visible through the printed surface of the top coat layer.