Non-stick metal utensil and non-stick cookware

Abstract

A non-stick metal utensil (100) and non-stick cookware. The non-stick metal utensil (100) comprises a body; the inner surface of the body is configured to be a micron-scale roughened surface; a PVD multi-metal film (104) is attached to the micron-scale roughened surface, and the PVD multi-metal film (104) is configured to form, on the micron-scale roughened surface, a micro-nano-scale porous oil-locking structure having low surface energy. The non-stick cookware has the advantages of being healthy and environmentally friendly, and has the beneficial effects of good anti-stick effect, high hardness, good wear resistance, and long service life.

Description

Non-stick metal utensil and non-stick cookware Technical Field

[0001] The present invention relates to the technical field of kitchenware, in particular to a non-stick metal utensil and a non-stick cookware, which significantly improve the non-stick effect of the metal utensil. Background Art

[0002] Non-stick pans in the prior art typically have a non-stick coating applied to the inner surface of the pan. The most commonly used coating material is Teflon, also known as polytetrafluoroethylene. This effectively solves the problem of sticking to the pan and brings some convenience to people's lives. However, the non-stick coating on the inner surface of the pan is prone to falling off during use, especially during high-temperature stir-frying. This is even more likely to happen if the non-stick pan is left unburned. Although polytetrafluoroethylene is non-toxic, it carbonizes and cracks when the pan is subjected to high-temperature stir-frying or unburned, releasing trace amounts of toxic gases and substances that can contaminate the food. This can lead to problems such as food sticking to the pan and accidental ingestion of the chemical coating.

[0003] On this basis, a non-stick pan has emerged in the prior art. It utilizes the lotus leaf effect to create an anti-stick structure on the inner wall of the pan. The anti-stick structure is a periodically distributed pattern of raised portions and / or recessed portions on the inner wall, with the sizes of the raised portions and recessed portions ranging from a few microns to tens of microns. The inner wall of the non-stick pan becomes a rough surface with a roughness on the micron scale, and the contact surface between the food being cooked and the inner wall of the non-stick pan becomes a composite contact surface. The recessed areas between the raised portions and the recessed areas of the recessed portions of the anti-stick structure are adsorbed with gas, forming an air cushion layer. This effectively reduces the contact area between the food being cooked and the inner wall of the non-stick pan, preventing the food from sticking to the food being cooked, achieving physical anti-stick and zero coating. Even when stir-frying at high temperatures or when the pan is left empty, the zero-coating non-stick pan does not release any toxic substances or gases, and will not contaminate the food being cooked or the kitchen environment, making cooking safer.

[0004] However, simply applying this structure to the surface of a non-stick pan to form a physical non-stick layer is far from enough. Because the non-stick pan needs to be heated when in use, the air cushion layer formed in the recessed area described in the above solution will be destroyed in the heating environment, thus failing to achieve the purpose of physical non-stick.

[0005] In addition, if only the above-mentioned physical non-stick method is set on the surface of the pot body, it is not enough to achieve long-term non-stick. Because each time cooking is performed, the spatula needs to be rubbed against the surface of the pot repeatedly many times, then the long-term friction will wear out the physical non-stick layer, and thus the long-term non-stick effect cannot be achieved. This problem also needs to be solved urgently.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a non-stick metal utensil and non-stick cookware with high wear resistance and long-lasting non-stick properties. The PVD multi-metal film has a low surface energy micro-nanostructure micron-level roughened surface composed of multi-metals, which significantly improves the non-stick effect.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a non-stick metal utensil, comprising a main body; the inner surface of the main body is constructed into a micron-scale roughened surface; wherein a PVD multi-element metal film is attached to the micron-scale roughened surface, and the PVD multi-element metal film is configured to form a micro-nanoscale porous oil-locking structure with low surface energy on the micron-scale roughened surface. The micron-scale roughened surface is formed by sandblasting, preferably by multi-stage sandblasting, and the micron-scale roughened surface can also be made by other methods. The roughness of the micron-scale roughened surface formed by sandblasting can usually reach Rz25~100μm, and the roughness Rz refers to the ten-point height of microscopic roughness, which refers to the sum of the average value of the five largest contour peak heights and the average value of the five largest contour valley depths within the sampling length L.

[0009] The above technical solution can be further improved through the following measures.

[0010] In one embodiment, the thickness h of the PVD multi-element metal film is less than the roughness Rz of the micron-scale roughened surface. The thickness of the PVD multi-element metal film ranges from 0.7 to 4.0 μm. The body comprises, from the inside to the outside, a first metal layer, a heat-sinking layer, and a second metal layer. The first metal layer and the second metal layer are integrated by the heat-sinking layer to ensure uniform heating of the first metal layer. The first metal layer is a stainless steel layer, the heat-sinking layer is an aluminum layer, and the second metal layer is a stainless steel layer.

[0011] In one embodiment, the PVD multi-element metal film includes a base layer, an intermediate layer, and a surface layer deposited sequentially from bottom to top. The base layer comprises metallic titanium and / or metallic chromium. The intermediate layer comprises chromium nitride and aluminum nitride, wherein the content of chromium nitride is 60-80 wt%, and the content of aluminum nitride is 20-40 wt%; alternatively, the intermediate layer comprises chromium carbide, wherein the content of chromium carbide is 85-95 wt%. The surface layer comprises metallic copper and aluminum oxide, wherein the content of metallic copper is 1.0-10 wt%. The surface layer further comprises iron oxide, wherein the iron oxide is 3-15 wt%. The thickness of the base layer is 0.1-1.0 μm, the thickness of the intermediate layer is 0.5-3.8 μm, and the thickness of the surface layer is 0.1-1.0 μm. The hardness range of the PVD multi-element metal film is HV1100-3500. The thickness range of the PVD multi-element metal film is 0.7-4.0 μm. The surface energy of the PVD multi-element metal film is less than 40 dynes, and the water drop angle thereof is greater than 95°.

[0012] Specifically, the PVD multi-element metal film was subjected to a flat abrasion resistance test 5,000 times according to the Chinese national standard GB / T32095.2-2015, and then subjected to a fried egg non-stickiness test, and the evaluation grade was I.

[0013] The present invention also provides a non-stick cookware, which is configured as the above-mentioned non-stick metal utensil.

[0014] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0015] The non-stick metal utensils and non-stick cookware of the present invention further deposit a low-surface-energy PVD multi-element metal film on the roughened surface of the inner metal layer. By controlling the thickness of the PVD multi-element metal film, a low-surface-energy micro-nanoscale porous oil-locking structure can be formed on the micron-scale roughened surface. This provides excellent non-stick properties and significantly improves the adhesion of the PVD multi-element metal film to the underlying layer, thereby extending the service life of the non-stick metal utensils. Furthermore, to address the technical issue of metal utensils being prone to localized overheating during cooking, which can damage the metal film, the cookware of the present invention also incorporates an aluminum heat-dissipating layer between the two metal layers. This aluminum heat-dissipating layer allows the bottom of the cookware to be heated more evenly, thereby extending the non-stick life of the non-stick cookware.

[0016] The PVD multi-element metal film of the present invention has a low-surface-energy, micro-nano-porous, oil-locking structure composed of nitrides, carbides, and oxides of multi-element metals (chromium and aluminum, and may also include titanium, copper, iron, etc.). Its bottom layer is primarily composed of titanium and / or chromium, which improves the adhesion of the PVD multi-element metal film to the substrate, thereby increasing the lifespan of the metal film. Its surface layer is composed of copper and aluminum oxide, forming an oxide film on the surface of the PVD multi-element metal film to prevent oxidative discoloration during use. The copper metal also has an effective antibacterial effect, particularly against Escherichia coli and Staphylococcus aureus, with an antibacterial effect exceeding 99.99%. Furthermore, when the copper content is less than 10wt%, it also exhibits a good non-stick effect. The surface energy of the PVD multi-element metal film in the present invention can reach less than 40 dynes, the water drop angle can reach more than 95 degrees, and it has a micro-nano-level porous oil-locking structure, which gives it excellent wear resistance and non-stick properties. After 5,000 plane wear resistance tests using the Chinese national standard GB / T32095.2~2015, the non-stick level can still reach Class I non-stick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] FIG1 is a cross-sectional view of the non-stick metal container in Example 1.

[0019] FIG. 2 is an enlarged view of point A in FIG. 1 .

[0020] FIG3 is a schematic diagram of the non-stick structure of the non-stick metal container in Example 1.

[0021] FIG4 is a surface morphology image of the non-stick metal container in Example 1 (500 times).

[0022] FIG5 is a surface morphology image of the non-stick metal container in Example 1 (1000 times).

[0023] FIG6 is a surface morphology image of the non-stick metal container in Example 1 (5000 times).

[0024] Explanation of reference numerals: 100. Non-stick cookware (non-stick metal utensil); 101. First metal layer; 102. Second metal layer; 103. Heat-saturating layer; 104. PVD multi-element metal film. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] Unless otherwise defined, technical or scientific terms used in this patent document shall have the ordinary meanings understood by persons of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar terms used in the specification and claims of this invention do not denote any order, quantity, or importance, but are merely used to distinguish one component from another. Similarly, terms such as "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects preceding the term "include" or "comprising" include the elements or objects listed after the term and their equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," and "near" are used solely to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are used solely to facilitate the description of the invention and to simplify the description. They are not intended to indicate or imply that the device or component referred to must have, be constructed, or operate in a specific orientation, and are not to be construed as limitations on the invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0030] Example 1:

[0031] A non-stick metal utensil 100 as shown in Figures 1 to 6 includes a first metal layer 101 and a second metal layer 102. The first metal layer 101 is configured as an inner layer. The inner surface of the first metal layer 101 is constructed as a micron-scale roughened surface with micron-scale holes. The micron-scale roughened surface is formed by sandblasting, preferably by multi-stage sandblasting. Knurling treatment can also be used in other embodiments. Among them, a PVD multi-element metal film 104 is plated on the micron-scale roughened surface, and micro-nano-scale holes are distributed on the PVD multi-element metal film 104 to form a porous oil-locking structure; the first metal layer 101 and the second metal layer 102 are combined into one by a heat-dissipating layer 103. The heat-dissipating layer 103 has a higher thermal conductivity than the first metal layer 101 to prevent the first metal layer 101 from being locally overheated and damaging the PVD multi-element metal film 104.

[0032] Physical vapor deposition (PVD) technology involves using physical methods under vacuum conditions to vaporize the surface of a material source (solid or liquid) into gaseous atoms or molecules, or partially ionize it into ions. Through a low-pressure gas (or plasma) process, a thin film with specialized functionalities is deposited on the surface. PVD is a major surface treatment technique. PVD coating technologies are primarily categorized into three types: vacuum evaporation, vacuum sputtering, and vacuum ion plating. The main PVD methods include vacuum evaporation, sputtering, arc plasma, ion plating, and molecular beam epitaxy. Corresponding vacuum coating equipment includes vacuum evaporation, sputtering, and ion plating machines. Depending on the application, PVD coating technology can also be divided into tool plating and decorative plating. In order to ensure the thickness of the PVD multi-element metal film, tool plating is used in the present application, so that the PVD multi-element metal film can reach 0.7 to 4.0 microns. Preferably, the thickness of the PVD multi-element metal film is 1.0 to 2.5 microns. Specifically, the thickness of the PVD multi-element metal film is 2.0 microns. In another embodiment, it can be 3 microns or 4 microns. It should be emphasized that the thickness of the PVD multi-element metal film should be adapted to the micron-scale roughened surface. The thickness of the PVD metal film needs to be less than the Rz value of the micron-scale roughened surface so that the PVD metal film can adhere to the micron-scale roughened surface to form a micro-nano porous oil-locking structure without covering the micron-scale roughened surface. In the present application, the micro-nano porous oil-locking structure is formed on the basis of the micron-scale roughened surface.

[0033] It should also be noted that the micro-nano porous oil-locking structure refers to the formation of micro-nano pores by depositing nitrides, carbides, and oxides of multiple metals (including at least chromium and aluminum, and further including titanium, copper, and iron) on a micron-scale roughened surface through PVD coating technology. The pore diameter of the micro-nano pores ranges from 0.1 to 3.0 microns, and in this embodiment, from 0.1 to 1.0 microns. The specific dimensions of the micron-scale pores can be measured using a Zeiss microscope (Axioplan 2 imaging), and the dimensions of the nano-scale pores can be measured using a scanning electron microscope (Nova 400 NanoSEM) (FEI, USA).

[0034] In a preferred embodiment, to further extend the service life of the PVD coating 104, the non-stick metal vessel utilizes a steel-aluminum-steel composite structure, wherein the first metal layer 101 is a stainless steel layer, the heat-diffusion layer 103 is an aluminum layer, and the second metal layer 102 is a stainless steel layer, such as SUS430. The stainless steel selected is preferably food-grade, especially the first metal layer 101, such as SUS304. The second metal layer 102 primarily serves a protective function. In addition to stainless steel, other metals, such as titanium alloys, may also be used. To further enhance the non-stick effect of the inner surface, a plurality of etched grooves arranged in an array may be etched on the inner surface, followed by sandblasting. The grooves may be produced using chemical etching or laser etching techniques, or may be knurled or bitten to form a micron-scale roughened surface on the surface of the etched grooves. The arrayed grooves can form a lotus leaf structure within the non-stick metal vessel 100, thereby enhancing the non-stick effect.

[0035] In this embodiment, the micro-nanopores can shrink and expand with changes in heating temperature. When animal fat or vegetable oil is used to heat the pot, the micro-nanopores expand as the pot temperature rises and shrink as the pot temperature drops. Further, when the user heats the pot, the micro-nanopores expand, facilitating the entry and exit of grease. When the pot is no longer heated, the pot temperature gradually cools, and the micro-nanopores shrink, locking the grease that has entered the pores. This locks in the grease, thereby achieving an oil-locking function and maintaining the non-stick properties of the pot surface. In this embodiment, the micro-nanopores with a pore size or opening width in the range of 0.1 to 1 μm have excellent oil storage and oil-locking functions, thereby improving the non-stick effect of the pot surface. A detailed view of the micro-nanopores is shown in Figure 3. After oil storage, the micro-nanoporous structure of the PVD multi-element metal film in the present invention can achieve a hydrophobic contact angle of over 95, resulting in the present invention having an excellent non-stick effect.

[0036] In this embodiment, the PVD multi-element metal film mainly contains titanium, chromium and aluminum. The chromium content is 20-50at%, the aluminum content is 50-70at%, and the titanium content is 1-10at%. When the titanium content is between 1-10at%, it can effectively reduce the surface energy, thereby improving the anti-sticking effect. Preferably, the titanium content is 3-6at%, specifically, the titanium content can be 3at%. The aluminum element contained in the PVD multi-element metal film can reduce its surface energy, thereby improving the anti-sticking effect, and the aluminum content is preferably about 30at%. In addition to reducing the surface energy, the chromium element contained can also improve corrosion resistance and prevent the precipitation of heavy metals. The chromium content is preferably 50at%. The PVD multi-element metal film includes a bottom layer, an intermediate layer and a surface layer deposited in sequence from bottom to top. The bottom layer contains metallic titanium and / or metallic chromium. In the bottom layer, titanium and chromium are both present in metallic form, which is used to improve the adhesion of the PVD multi-element metal film to the roughened surface, and at the same time can prevent heavy metal substances from being precipitated from the first metal layer, which affects physical health. It is also noted that in the bottom layer, titanium and chromium can exist alone or simultaneously, and both can achieve the purpose of preventing sticking and preventing the precipitation of heavy metals, but the performance of having both titanium and chromium is better.

[0037] In the middle layer, nitrides and / or carbides of chromium aluminum are contained, and nitrides and / or carbides of titanium may be further contained. Specifically, they may be titanium nitride (TiN), chromium nitride (CrN), aluminum nitride (AlN), titanium carbide (TiC), chromium carbide (CrC), aluminum carbide (AlC), aluminum titanium nitride (AlTiN) and aluminum chromium nitride (AlCrN), aluminum titanium nitride (AlTiN), aluminum chromium nitride (AlCrN) and aluminum chromium carbide (Cr2AlC). Regarding the specific content of the multinary metal, those skilled in the art can adjust it within the above range. It should be pointed out that nitrides and carbides of chromium aluminum can exist alone or at the same time. In particular, chromium carbide can significantly improve the hardness and wear resistance, as well as corrosion resistance of the PVD multinary metal film, and can also improve the hydrophobicity of the PVD multinary metal film. In another embodiment, chromium carbide can be added to the surface layer to further improve the hydrophobicity of the PVD multinary metal film. Among nitrides, titanium nitride has good thermal stability and good resistance to thermal shock. Aluminum nitride is in a ceramic state and has excellent thermal conductivity, which can prevent the PVD film from being destroyed due to local overheating. Chromium nitride has good corrosion resistance and can reduce the friction coefficient of the PVD film, making it have excellent wear resistance. Therefore, the combination of titanium chromium aluminum nitride and carbide has higher hardness and wear resistance. In addition, the intermediate layer can also make the PVD film of the present invention have good mechanical shock resistance and thermal shock resistance. Even when cooking directly with tools such as metal spatulas, or when local overheating occurs, the PVD film is not easily damaged. The PVD multi-metal film in this embodiment has low surface energy, extremely high hardness and non-occupying properties. Specifically, its hardness can reach HV1000~5000, the surface energy can reach below 40 dynes, and the water drop angle is above 95 degrees.

[0038] Specifically, the intermediate layer in this embodiment comprises chromium nitride and aluminum nitride, wherein the content of chromium nitride is 60-80wt%, specifically 75wt%, and the content of aluminum nitride is 20-40wt%, specifically 25wt%. In another embodiment, the intermediate layer comprises chromium carbide, wherein the content of chromium carbide is 85-95wt%, and the remaining components are one or a combination of aluminum nitride and titanium nitride, and may also include components such as aluminum carbide. The surface layer comprises metallic copper and aluminum oxide, wherein the content of metallic copper is 1.0-10wt%, specifically 5wt%. The surface layer also comprises iron oxide, wherein the content of iron oxide is 3-15wt%, specifically 10wt%, and may also be 5wt% or 12wt%. wt% is a percentage by mass. In the surface layer, except for metallic copper, aluminum oxide and iron oxide, the content of other components and impurities is less than 5wt%.

[0039] In this embodiment, the PVD film is a non-stick metal film primarily composed of chromium and aluminum. The aluminum contained in the PVD multi-element metal film reduces its surface energy, thereby enhancing its anti-stick properties. The chromium contained in the film not only reduces surface energy but also improves corrosion resistance and prevents the release of heavy metals. The primary metal components of the PVD multi-element metal film in this embodiment are titanium, aluminum, chromium, iron, and copper, while the non-metallic components primarily include oxygen, carbon, nitrogen, and silicon.

[0040] The surface layer may also include titanium and chromium oxides, specifically one of at least one of titanium and chromium oxides, such as titanium oxide, or a combination of titanium oxide and chromium oxide. The combination of metallic copper and aluminum oxide (combination of metallic copper and aluminum-iron oxide) imparts excellent non-stick properties to the surface layer. The surface layer can form an oxide film on the surface of the PVD film, thereby preventing discoloration during subsequent use. Furthermore, the aluminum oxide prevents oxidation of metallic copper to produce toxic copper oxide.

[0041] Adding metallic copper to the PVD multi-element metal film makes the PVD multi-element metal film have antibacterial effect. When the copper content is below 10 wt %, the anti-sticking effect of the PVD multi-element metal film can be further improved.

[0042] In this embodiment, the bottom layer is attached to the micron-scale roughened surface, and the surface layer is attached to the surface of the middle layer. The thickness of both the surface layer and the bottom layer is relatively small, specifically 0.1 to 1 μm, specifically 0.3 μm in this embodiment, and may also be 0.5 μm or 0.8 μm in other embodiments. The thickness of the middle layer is 5 to 6.8 μm, specifically 6.4 μm.

[0043] The inner surface of the PVD multi-element metal film 104 is polished, for example, by high-pressure water polishing or other polishing methods. The thickness of the PVD multi-element metal film 104 ranges from 0.7 to 6.0 μm, preferably from 2 to 5 μm, and more specifically, from 2 μm.

[0044] On the basis of the above technical content, in order to construct a porous oil-locking structure with low surface energy, technicians in the relevant field can adjust the proportions of various components according to actual needs, or add other metal or non-metal components on the basis of the above-mentioned multi-metal, such as further adding silicon to form high-melting-point iron silicide. After testing, the hardness range of the PVD multi-metal film 104 is HV1000~5000, preferably the hardness range of the PVD multi-metal film 104 is HV1100~3500, and more preferably HV2000~3500. In addition, the PVD multi-metal film has a low surface energy, but its hardness and wear resistance are extremely excellent, which makes the present invention have the beneficial effects of good anti-sticking effect, high hardness, good wear resistance and long service life.

[0045] In this embodiment, the wear resistance of the PVD multi-element metal film 104 was measured to be Class I non-stick after 5,000 wear tests in accordance with the Chinese national standard "GB / T32095.2-2015 Non-stick Surface Performance and Test Specifications for Metal Cooking Utensils for Household Food Part 2: Non-stick and Wear Resistance Test Specifications." The oil-free frying egg test showed that Class I non-stick performance was achieved. Class I means that the egg can be removed without damage using a plastic spatula and no residue is left. Class II means that the egg cannot be removed without damage using a plastic spatula, but residue can be removed by gently wiping with a wet sponge or rag. The non-stick performance of the non-stick metal utensil 100 of the present invention is Class I. After long-term laboratory testing, the number of Class I eggs can reach 7 to 9, with the highest record reaching 20 Class I eggs, far exceeding the Chinese standard requirement of 3 eggs.

[0046] The present invention also provides a non-stick cookware 100 with a PVD multi-element metal film 104, which is the above-mentioned non-stick metal utensil 100. The non-stick cookware can be used as a frying pan, and the one with chromium carbide as the surface layer can be used as the inner pot of an electric rice cooker, a pressure cooker, etc.

[0047] From the above description, it can be seen that the present invention has the following beneficial effects:

[0048] The PVD multi-element metal film 104 non-stick metal utensil 100 and the PVD multi-element metal film 104 non-stick cookware 100 of the present invention further deposit the PVD multi-element metal film 104 on the roughened surface of the inner metal layer. By controlling the thickness of the PVD multi-element metal film 104, the micron-scale holes on the micron-scale roughened surface can be transformed into micro-nanoscale holes, thereby imparting a good non-stick effect to the inner metal surface. However, during use, the bottom of the cookware is prone to local overheating, which damages the PVD multi-element metal film 104 and causes the cookware to lose its non-stick properties. To address this technical problem, the cookware of the present invention employs an aluminum heat-dissipating layer 103 disposed between the two metal layers. The aluminum heat-dissipating layer 103 allows the bottom of the cookware to be heated more evenly, thereby extending the non-stick life of the cookware.

[0049] In summary, the non-stick metal utensil (non-stick cookware) 100 of the present invention exhibits excellent non-stick properties, achieving a Class I non-stick rating after 5,000 abrasion tests. Furthermore, the present invention further extends the lifespan of the non-stick performance by providing uniform heating at the bottom of the cookware. Furthermore, the materials used in the present invention meet food hygiene standards and do not contain any heavy metals harmful to the human body, making it safe and healthy.

[0050] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A non-stick metal container, comprising a body; characterized in that: The inner surface of the body is configured as a micron-scale roughened surface; Wherein, a PVD multi-element metal film is attached to the micron-scale roughened surface, and the PVD multi-element metal film is configured to form a micro-nano-scale porous oil-locking structure with low surface energy on the micron-scale roughened surface.

2. The non-stick metal container according to claim 1, characterized in that: The PVD multi-element metal film comprises a bottom layer, an intermediate layer and a surface layer which are deposited in sequence from bottom to top.

3. The non-stick metal container according to claim 2, characterized in that: The base layer comprises metallic titanium and / or metallic chromium.

4. The non-stick metal container according to claim 3, characterized in that: The intermediate layer comprises chromium nitride and aluminum nitride, wherein the content of chromium nitride is 60-80wt%, and the content of aluminum nitride is 20-40wt%; or, The intermediate layer comprises chromium carbide, wherein the content of the chromium carbide is 85-95 wt %.

5. The non-stick metal container according to claim 4, characterized in that: The surface layer comprises metallic copper and aluminum oxide, wherein the content of the metallic copper is 1.0 to 10 wt %.

6. The non-stick metal container according to any one of claims 2 to 5, characterized in that: The thickness of the PVD multi-element metal film ranges from 0.7 to 4.0 μm.

7. The non-stick metal container according to any one of claims 2 to 5, characterized in that: The thickness of the surface layer is 0.1-1.0 μm.

8. The non-stick metal container according to any one of claims 2 to 5, characterized in that: The hardness range of the PVD multi-element metal film is HV1100-3500.

9. The non-stick metal container according to any one of claims 2 to 5, characterized in that: The surface energy of the PVD multi-element metal film is less than 40 dynes, and the hydrophobic angle after oil storage is greater than 95°.

10. The non-stick metal container according to any one of claims 2 to 5, characterized in that: The PVD multi-element metal film was subjected to 5000 times of plane wear resistance test according to the Chinese national standard GB / T32095.2-2015, and the fried egg non-stickiness test result was evaluated as Grade I.

11. The non-stick metal container according to claim 1, characterized in that Grooves are distributed on the inner side of the body, and the roughened surface is formed on the grooves.

12. The non-stick metal container according to claim 1, characterized in that The body includes a first metal layer, a heat-saturating layer, and a second metal layer in sequence from the inside to the outside. The first metal layer and the second metal layer are combined into one by the heat-saturating layer, so that the first metal layer is heated evenly.

13. The non-stick metal container according to claim 12, characterized in that: The first metal layer is a stainless steel layer, the heat-absorbing layer is an aluminum layer, and the second metal layer is a stainless steel layer.

14. A PVD multi-element metal film non-stick cookware, which is configured as the non-stick metal utensil according to any one of claims 1 to 13.

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