Uncoated Pressed Non-Stick Cookware Using Micro-Pit Surface Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing non-stick cookware coatings, such as PTFE or Teflon, degrade at high temperatures, releasing toxic fumes and having a short service life, while physical non-stick structures with small protrusions or pits fail to provide persistent non-stickiness due to wear from friction.
Innovation Solution
An uncoated pressed non-stick cookware with uniformly distributed pits of 0.1-0.5 mm aperture and 0.3-2 mm edge-to-edge distance, a stainless-steel or titanium body with a composite aluminum layer, and a hardened surface treated with titanium or zirconium plating, achieving a 15%-40% pit area coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PTFE or Teflon coating is applied to achieve non-stick performance, then non-stick effect is improved, but service life decreases and health safety deteriorates at high temperatures
Solution Approach 1:
The invention extracts and eliminates the harmful PTFE/Teflon coating from the cookware surface, retaining only the beneficial non-stick effect through physical means (micro-concave structures) rather than chemical coating, thereby removing the source of toxic fumes and coating shedding
Solution Approach 2:
The invention replaces the chemical coating system (PTFE/Teflon) with a physical mechanical structure system (micro-concave pits on surface), using mechanical/physical means to achieve non-stick effect instead of relying on chemical coating properties
2Reliability
If PTFE or Teflon coating is applied to achieve non-stick performance, then non-stick effect is improved, but service life decreases due to carbonization and falling off above 250°C
Solution Approach 1:
The invention removes the temperature-sensitive PTFE/Teflon coating that carbonizes and falls off above 250°C, replacing it with a heat-resistant physical micro-concave structure that maintains non-stick performance without degradation at high temperatures
Solution Approach 2:
The invention changes the fundamental parameter of non-stick achievement from chemical coating (temperature-sensitive) to physical structure (temperature-resistant), enabling the cookware to withstand high temperatures without coating degradation
3Object-affected harmful factors
If small protrusions or pits are created on cookware surface to achieve physical non-stick effect, then chemical coating is eliminated, but persistent non-stickiness cannot be achieved due to wear from friction
Solution Approach 1:
The invention applies local quality enhancement by creating micro-concave pits with specific dimensional parameters (0.1-0.5mm aperture, 0.05-0.3mm depth) and optimal distribution density (15%-40% area coverage) to maximize non-stick effect while distributing friction wear across the entire surface rather than concentrating it on small features
Solution Approach 2:
The invention utilizes a porous-like micro-concave structure on the cookware surface that traps air and food particles, creating a physical barrier that reduces direct contact and friction, thereby maintaining non-stick performance even after repeated use
4Reliability
If large honeycomb holes with aperture more than 3mm are created, then non-stick effect is achieved, but contact area between coating and food is large resulting in large friction surface
Solution Approach 1:
The invention fundamentally changes the scale parameter of the surface structure from large honeycomb holes (3mm aperture) to micro-concave pits (0.1-0.5mm aperture), creating numerous small features that collectively provide non-stick effect while minimizing individual contact points and reducing overall friction with spatula
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 cookware provides a durable, non-toxic, and effective non-stick performance comparable to PTFE, reducing friction and maintaining safety at high temperatures without chemical coatings, at a lower manufacturing cost.
Implementation Method 1
If the cookware body is made of a titanium plate, a hardened layer of titanium dioxide with a Vickers hardness of not lower than HV600 will be formed on the surface of the titanium plate after micro-arc oxidation. If the cookware body is made of an aluminum alloy plate, a hardened layer of aluminum oxide with a Vickers hardness of not lower than HV1000 will be formed on the surface of the aluminum alloy plate after micro-arc oxidation.
Implementation Method 2
Nanoscale pores absorb air and oil during actual use, and produce hot air and oil mist during heating, while holding up food.
Implementation Method 3
In light of the fluff effect achieved by the aforementioned raised structure, the force of friction between food and the inner surface of cookware is reduced, and the non-stick effect is achieved by physical means
Data Source
AI summary
The uncoated pressed non-stick cookware, comprising an uncoated stainless-steel or uncoated titanium cookware body having a food contact surface, on which pits are uniformly distributed, wherein the pits have an aperture of 0.1-0.5 mm, wherein the area of the pits accounts for 15%-40% of the area of the entire cookware body.