PVD Multi-Metal Non-Stick Cookware for Durable Toxic-Free Release
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Solution Overview
Problem
Conventional non-stick cooking utensils face issues such as peeling of coatings, release of toxic gases, and inadequate long-term non-stick performance due to disruption of air cushion layers and surface wear during heating.
Innovation Solution
A non-stick metal vessel with a PVD multi-metal film having a micro-nano porous structure, composed of multiple metals, is applied to a micro-textured surface, enhancing wear resistance and non-stick properties through a controlled thickness and inclusion of an aluminum heat distribution layer for uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-stick coating (PTFE) is applied to the inner surface of the cooking utensil, then the non-stick property is improved, but the coating peels off during high-temperature stir-frying and releases toxic gases when overheated
Solution Approach 1:
The patent removes the PTFE coating entirely and replaces it with a physical non-stick structure created through sandblasting treatment on the metal surface. This extracts the harmful coating material while retaining the essential non-stick function through micro-textured surface geometry that prevents food adhesion without chemical additives.
Solution Approach 2:
The sandblasted surface creates a micro-textured porous structure with numerous small cavities and protrusions. This porous morphology reduces the actual contact area between food and the pan surface, creating a physical barrier that prevents sticking while allowing heat to penetrate effectively to the food.
2Object-affected harmful factors
If a physical non-stick structure with micro-scale roughness is created on the inner surface, then toxic substance release is prevented, but the air cushion layer is disrupted during heating and non-stick performance becomes ineffective
Solution Approach 1:
The patent applies a composite coating system consisting of multiple layers: a base metal layer, an intermediate bonding layer, and a top PVD coating layer. This composite structure combines the benefits of physical texture with enhanced surface properties that maintain non-stick performance under thermal conditions while preventing toxic release.
Solution Approach 2:
The PVD coating process modifies the surface parameters of the micro-textured structure by depositing a thin film that preserves the underlying micro-roughness while adding thermal stability. This parameter change allows the surface to maintain its non-stick geometry during heating without the air cushion disruption that occurs with uncoated surfaces.
3Ease of manufacture
If only a physical non-stick structure is applied to the surface, then coating material is eliminated, but the surface wears down gradually due to repeated spatula rubbing and long-term non-stick performance is not achieved
Solution Approach 1:
The PVD coating creates a thin film structure that is flexible enough to conform to the micro-textured surface geometry while providing enhanced durability. This thin film protects the underlying sandblasted structure from wear by spatulas during normal cooking use, significantly extending the service life of the non-stick surface.
Solution Approach 2:
The multi-layer composite construction combines the wear resistance of the PVD coating with the mechanical integrity of the sandblasted metal substrate. This composite approach provides both the durability needed to withstand repeated use and the micro-textured geometry required for non-stick performance over the long term.
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 PVD multi-metal film achieves superior non-stick performance, maintaining Grade I non-stick rating after 5000 cycles, with antibacterial properties and uniform heating, ensuring safety and longevity.
Implementation Method 1
A non-stick metal vessel with a PVD multi-metal film having a micro-nano porous structure
Implementation Method 2
The micro-textured surface is formed through a sandblasting process
Implementation Method 3
inclusion of an aluminum heat distribution layer for uniform heating
Data Source
AI summary
A non-stick metal vessel and a non-stick cooking utensil. The non-stick metal vessel includes a body. An inner surface of the body is constructed to exhibit a micro-level roughened texture. The micro-level roughened texture is coated with a PVD multi-metal film. The PVD multi-metal film is configured to be capable of creating a low surface energy micro-nano porous oil-locking structure. This disclosure possesses commendable advantages in terms of health and environmental friendliness. Furthermore, it offers remarkable anti-adhesive properties, exceptional hardness, outstanding wear resistance, and an extended lifespan.