Thermoplastic Profile PVD Metal Coating Adhesion
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Solution Overview
Problem
Existing metal plastic composite profiles for window, door, and facade elements face challenges in achieving a strong mechanical connection and long-term stable adhesive bonding between thermoplastic and metal layers, particularly with thin metal coatings and complex geometries.
Innovation Solution
A metal containing layer made of aluminium nitride or chromium, deposited using Physical Vapour Deposition (PVD) directly on the thermoplastic profile body, with a thickness ranging from 110 nm to 170 nm, enhancing mechanical connection and adherence without intermediate layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thin metal coating is applied to thermoplastic profile, then the mechanical connection strength is improved, but the adherence stability over time deteriorates
Solution Approach 1:
An intermediate layer is introduced between the thermoplastic profile and the thin metal coating. This intermediate layer serves as a mediator that enhances both the mechanical connection strength and long-term adherence stability, resolving the contradiction between achieving strong bonding with thin coatings and maintaining stability over time.
Solution Approach 2:
A composite structure is created consisting of the thermoplastic profile, intermediate layer, and metal coating. This composite material approach allows each layer to contribute its specific properties, achieving both strong mechanical connection and stable long-term adherence that neither thin coating alone could provide.
2Object-affected harmful factors
If powder coating is applied to thermoplastic profile, then the environmental resistance is improved, but the coating uniformity and adhesion deteriorate
Solution Approach 1:
The intermediate layer acts as a mediator between the thermoplastic profile and the powder coating. This intermediate layer provides a surface that enhances powder coating characteristics, resulting in improved coating uniformity and adhesion while maintaining environmental resistance.
Solution Approach 2:
The surface properties of the thermoplastic profile are modified by introducing the intermediate layer, which changes parameters such as surface energy and roughness. These parameter changes create an optimal surface for powder coating application, improving both uniformity and adhesion.
3Object-affected harmful factors
If metal coating is deposited on thermoplastic, then the UV radiation resistance is improved, but the coating thickness control deteriorates
Solution Approach 1:
The intermediate layer serves as a mediator that provides a controlled surface for metal coating deposition. This intermediate layer enables precise control of metal coating thickness while maintaining UV radiation resistance, as the intermediate layer ensures uniform deposition characteristics.
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 improved mechanical strength and long-term stable adhesive connections between thermoplastic and metal components, enabling better powder coating and resistance to environmental factors like UV radiation and temperature extremes.
Implementation Method 1
a metal containing layer is deposited using Physical Vapour Deposition (PVD) directly on the thermoplastic profile body
Data Source
AI summary
A profile for window, door, facade or cladding elements is disclosed, which comprises a profile body (2) made from thermoplastic material and extending in a longitudinal direction (z) with an essentially constant cross-section (x-y) along the longitudinal direction (z) and having at least one outer surface (2a), and a metal containing layer (4) deposited on at least part of the at least one outer surface (2a), wherein the thermoplastic material is polyamide, propylene, wherein the metal containing layer is made of aluminium or aluminium nitride or chromium, wherein the metal containing layer (4) is deposited directly on the profile body (2) using a PVD technology, and wherein the metal containing layer has a thickness in the range from 110 nm to 170 nm.