Diamond-Particle Non-Stick Coating for Abrasion-Resistant Release
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Solution Overview
Problem
Existing non-stick coatings on metal substrates face challenges in achieving good adhesion, abrasion resistance, and wear resistance while maintaining effective food release, with previous solutions providing limited improvements in durability and wear resistance.
Innovation Solution
Incorporating diamond particles into the undercoat of a multilayer non-stick coating system, specifically in the midcoat, combined with ceramic particles and inorganic film hardeners, to enhance abrasion resistance and surface hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fluoropolymer resins are used for non-stick coating, then release performance and chemical resistance are improved, but adhesion to metal substrate deteriorates
Solution Approach 1:
The coating is divided into multiple functional layers: a fluoropolymer-based non-stick layer for release performance, and a separate undercoat layer containing diamond particles and ceramic fillers for adhesion and abrasion resistance. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The undercoat combines diamond particles, ceramic fillers (such as aluminum oxide, silicon carbide), and binder resins to create a composite material that provides both strong adhesion to the metal substrate and high abrasion resistance, while the fluoropolymer layer provides the non-stick surface.
2Reliability
If large ceramic particles are incorporated to improve abrasion resistance, then wear resistance is improved, but coating uniformity and surface finish deteriorate
Solution Approach 1:
Large ceramic particles and diamond particles are concentrated in the undercoat layer where they provide abrasion resistance, while the overcoat fluoropolymer layer maintains a smooth, uniform surface for non-stick performance. Each layer has different compositional qualities suited to its specific function.
Solution Approach 2:
The undercoat layer can be designed with a porous structure that accommodates the ceramic particles and diamond particles, allowing them to be embedded within the matrix rather than creating surface irregularities. This porous structure also allows for better adhesion to the substrate.
3Reliability
If diamond particles are added to enhance hardness and abrasion resistance, then wear resistance is improved, but coating complexity and manufacturing difficulty increase
Solution Approach 1:
Diamond particles are incorporated specifically in the undercoat layer rather than throughout the entire coating system. This segmentation places the high-cost, high-performance material only where it is most needed for adhesion and abrasion resistance, while the fluoropolymer layers maintain simplicity and non-stick functionality.
Solution Approach 2:
The concentration of diamond particles can be optimized within the undercoat layer to achieve the desired level of abrasion resistance while controlling cost and processing complexity. Particle size distribution can also be adjusted to balance performance with manufacturing ease.
Data Source
AI summary
A non-stick coating composition comprising diamond particles of relatively large size, i.e., greater than 1 micrometer, preferably greater than 10 micrometers, and a fluoropolymer, can be applied to a substrate. In addition, a structure comprising a substrate and an undercoat is applied to the substrate, where the undercoat comprises a primer layer comprising a heat resistant non-fluoropolymer polymer binder and diamond particles, and optionally a midcoat also comprising diamond particles.