PVD Coatings Embedded in Paint Layers for Flexible Plastic Substrates
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Solution Overview
Problem
Existing technologies face challenges in achieving flexible, unbreakable, and optically metallic plastic substrates with adaptive shapes, efficient weight savings, non-conductive metallic appearances, and reliable electrical conductivity, while minimizing environmental impact and tool costs.
Innovation Solution
A coating system comprising a PVD layer system with alternating layers of different compositions, embedded between a base coat and a top coat, applied to flexible plastic substrates, utilizing anodic oxidation of Ti/Al layers for color and stress reduction, and transparent metal oxide layers for non-conductive metallic appearances, and direct deposition for conductive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If electroplating is used to achieve metallic appearance, then optical metallic effect is improved, but flexibility and unbreakability deteriorate due to sharp edges production
Solution Approach 1:
The patent replaces the mechanical/electrochemical electroplating process with a PVD (physical vapor deposition) process. This substitution eliminates the sharp edges problem inherent in electroplating while maintaining the metallic optical effect. The PVD process deposits metal layers in a vacuum environment, creating a flexible and unbreakable coating suitable for plastic substrates.
Solution Approach 2:
The patent employs composite material structures by combining PVD metal layers with plastic substrates and protective top coats. This composite approach integrates the metallic appearance of PVD coatings with the flexibility and formability of plastic substrates, achieving both aesthetic and functional requirements simultaneously.
2Illumination intensity
If foil technology is used to achieve metallic appearance, then optical metallic effect is improved, but cost and adaptability to complex shapes deteriorate
Solution Approach 1:
The patent replaces the mechanical foil application process with a PVD deposition process. This allows direct coating of complex three-dimensional shapes without the need for pre-formed foils, significantly improving adaptability to complex geometries and reducing manufacturing costs associated with foil handling and application.
Solution Approach 2:
The patent transitions from two-dimensional foil application to three-dimensional direct deposition. The PVD process can coat complex surfaces with varying orientations and angles, enabling metallic appearance on components with intricate geometries that cannot be effectively covered by flat foils.
3Device complexity
If PVD single layer is used to achieve metallic appearance, then process simplicity is improved, but functional versatility and stress management deteriorate
Solution Approach 1:
The patent divides the PVD coating into multiple distinct layers, each with specific functions. The first PVD layer provides adhesion and stress management, the second PVD layer provides the metallic appearance, and intermediate layers provide transition and protection. This segmentation allows optimization of each layer's properties for its specific function.
Solution Approach 2:
The patent creates composite PVD structures with alternating layers of different metals or metal alloys. These multi-layer composite coatings combine materials with different mechanical and optical properties, achieving stress balance, enhanced adhesion, and controlled optical appearance that cannot be obtained with single-layer coatings.
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 enables flexible, unbreakable, and optically metallic plastic components with significant weight savings, improved paintability, and environmental sustainability, while maintaining electrical conductivity and achieving desired optical effects.
Implementation Method 1
a layer deposited from the gas phase, which comprises several, in particular at least two, layers and in particular an alternating layer system, wherein at least two of these layers preferably have a different composition
Implementation Method 2
anodic oxidation of Ti/Al layers for color and stress reduction
Data Source
AI summary
The present invention concerns a plastic component with a coating system, wherein the coating system comprises a base coat of paint which has been applied to the surface of the plastic and on which a coating applied by means of vapour phase deposition is provided, for its part covered by a top coat of paint, characterized in that the coating applied by vapour phase deposition comprises multiple layers.