Non-stick metal tableware

Abstract

In the non-stick metal tableware and non-stick cooking tool provided by the present invention, the non-stick metal tableware comprises a main body; the inner surface of the main body is composed of a micro-scale roughening surface; wherein a PVD multi-metal film is attached to the micro-scale roughening surface, and the PVD multi-metal film is positioned such that a micro-nano-scale porous oil-locking structure with low surface energy is formed on the micro-scale roughening surface. The present invention possesses advantages regarding health and environmental protection and has beneficial effects such as excellent anti-sticking effect, high hardness, excellent wear resistance, and long service life.

Description

Technology Field

[0001] The present invention relates to the technical field of kitchen utensils, and in particular to non-stick metal tableware and non-stick cooking tools, which can significantly improve the non-stick effect of metal tableware. Background Technology

[0002] Conventional non-stick cooking utensils generally feature a single anti-stick coating layer on the inner wall. The most commonly used coating material is Teflon, scientifically known as polytetrafluorethylene, which not only effectively solves the problem of food sticking but also provides convenience in daily life. However, the anti-stick coating layer on the inner wall of the cooking utensil easily detaches during use, particularly when stir-frying or deep-frying at high temperatures. Furthermore, if the non-stick cooking utensil is heated while empty, the anti-stick coating detaches even more easily. Although polytetrafluorethylene itself is non-toxic, when the non-stick cooking utensil is stir-fried or deep-fried at high temperatures or heated while empty, carbonization and thermal decomposition occur in the polytetrafluorethylene, releasing trace amounts of harmful gases and substances that contaminate the cooked food. Consequently, problems arise such as food sticking to the utensil and the accidental ingestion of the chemical coating layer.

[0003] Based on this, the non-stick cooking tool described in the prior art utilizes the Lotus Effect to create a non-stick structure on the inner wall of the cooking tool. The non-stick structure consists of protrusions and / or depressions periodically distributed on the inner wall, and the size of the protrusions and depressions is between a few micrometers and several tens of micrometers. When the inner wall of the non-stick cooking tool transforms into a rough surface with micro-scale roughness, the contact surface between the cooked food and the inner wall of the non-stick cooking tool transforms into a composite contact surface. Since the protrusions of the anti-stick structure, the concave areas between the protrusions, and the concave areas of the depressions all adsorb gas to form an air cushion layer, the contact area between the cooked food and the inner wall of the non-stick cooking tool is effectively reduced, preventing the cooked food from sticking and realizing physical anti-sticking without a coating layer; even when stir-fried or deep-fried at high temperatures or heated while empty, the non-stick cooking tool without a coating layer does not emit any toxic substances or gases, thus preventing contamination of the cooked food or kitchen environment and allowing for safer cooking.

[0004] However, this structure is not sufficient to form a physically non-stick layer when applied to the surface of a non-stick cooking tool. This is because the air cushion layer formed inside the concave area described in the above-described method is destroyed in a heated environment, and thus the purpose of physical non-sticking cannot be achieved.

[0005] Furthermore, designing the aforementioned physical non-stick method onto the surface of the cooking tool body cannot maintain non-stick properties for a long time. Since the surface of the cooking tool is repeatedly rubbed by a spatula during cooking, the physical non-stick layer wears down over time due to friction, and consequently, the non-stick effect cannot be sustained for an extended period; therefore, this is a problem that must be urgently resolved. The problem to be solved

[0006] The technical problem to be solved in this invention is to provide non-stick metal tableware and non-stick cooking tools capable of achieving strong wear resistance and sustained non-stick properties to solve the aforementioned conventional technical problems, and this PVD multi-metal film is equipped with a micro-scale roughening surface of a nano-structure with low surface energy composed of multi-metals, thereby significantly enhancing the non-stick effect. means of solving the problem

[0007] To achieve the above-mentioned objective, the non-stick metal tableware provided by the present invention comprises a main body; and a micro-scale roughening surface is formed on the inner surface of the main body; wherein a PVD multi-metal film is attached to the micro-scale roughening surface, and the PVD multi-metal film is positioned so that a micro-nano-scale porous oil-locking structure with low surface energy can be formed on the micro-scale roughening surface. The micro-scale roughening surface is formed through sandblasting treatment, preferably manufactured by multi-stage sandblasting, and the micro-scale roughening surface may also be manufactured by other methods. The roughness of the micro-scale roughening surface formed through sandblasting treatment generally reaches Rz25 to 100 μm, and roughness Rz refers to the height of 10 points of microcosmic flatness, which indicates the sum of the average value of the heights of the five largest profile peaks and the average value of the five largest profile valley depths within the sampling length L.

[0008] The technical solution described above can be further improved through the following explanation.

[0009] In one embodiment, the thickness h of the PVD multi-metal film is smaller than the roughness Rz of the micro-scale rough surface. The thickness range of the PVD multi-metal film is 0.7 to 4.0 μm. The main body comprises a first metal layer, a thermal uniform layer, and a second metal layer in order from the inside to the outside, and the first metal layer and the second metal layer are integrally combined by the thermal uniform layer to ensure that the first metal layer is heated uniformly. The first metal layer is a stainless steel layer, the thermal uniform layer is an aluminum layer, and the second metal layer is a stainless steel layer.

[0010] In one embodiment, the PVD multi-metal film comprises a bottom layer, an intermediate layer, and a surface layer deposited in order from bottom to top. The bottom layer comprises metallic titanium and / or metallic chromium. The intermediate layer comprises chromium nitride and aluminum nitride, wherein the content of the chromium nitride is 60 to 80 wt% and the content of the aluminum nitride is 20 to 40 wt%; or, the intermediate layer comprises chromium carbide, wherein the content of the chromium carbide is 85 to 95 wt%. The surface layer comprises metallic copper and aluminum oxide, wherein the content of the metallic copper is 1.0 to 10 wt%. The surface layer further comprises iron oxide, wherein the content of the iron oxide is 3 to 15 wt%. The thickness of the bottom layer is 0.1 to 1.0 μm, the thickness of the intermediate layer is 0.5 to 3.8 μm, and the thickness of the surface layer is 0.1 to 1.0 μm. The hardness range of the PVD multi-metal film is HV1100 to 3500. The thickness range of the PVD multi-metal film is 0.7 to 4.0 μm. The surface energy of the PVD multi-metal film is less than 40 dynes, and its droplet angle is greater than 95 degrees.

[0011] Specifically, the PVD multi-component metal film was subjected to 5,000 flat wear resistance tests in accordance with the Chinese national standard GB / T32095.2~2015, and the grade of the evaluation result of the non-stick egg frying test was Grade I.

[0012] In the non-stick cooking tool further provided in the present invention, the above-described non-stick metal tableware is used. Effects of the invention

[0013] The present invention adopts the above technical method and has the following beneficial effects.

[0014] In the non-stick metal tableware and non-stick cooking tool of the present invention, a PVD multi-metal film with low surface energy is further deposited on the roughened surface of the inner metal layer, and the thickness of this PVD multi-metal film can be controlled so that a micro-nano scale porous oil-locking structure with low surface energy is formed on the micro-scale roughening surface, thereby providing an excellent non-stick effect and simultaneously significantly improving the adhesion of the PVD multi-metal film on the bottom layer, which can extend the service life of the non-stick metal tableware. In addition, to solve the technical problem of the metal film being damaged due to partial overheating during cooking, the cooking tool of the present invention is equipped with an aluminum thermal uniform layer between two layers of metal, and due to the aluminum thermal uniform layer, the bottom part of the cooking tool can receive heat more uniformly, thereby extending the non-stick life of the non-stick cooking tool.

[0015] In the present invention, the PVD multi-metal film has a micro-nano porous oil-locking structure with low surface energy composed of nitrides, carbides, and oxides of multi-metals (chromium and aluminum further include titanium, copper, iron, etc.), and its bottom layer is mainly metallic titanium or metallic chromium, which can not only improve the adhesion of the PVD multi-metal film on the main body but also extend the service life of the metal film. Since its surface layer is metallic copper and aluminum oxide, a layer of oxide film is formed on the surface of the PVD multi-metal film, which can prevent oxidation and discoloration problems from occurring during the use of the PVD multi-metal film, and at the same time, metallic copper can perform an effective antibacterial action, providing an antibacterial effect of more than 99.99% against Escherichia coli and Staphylococcus aureus, and can have an excellent non-stick effect when the copper content is 10 wt% or less. In the present invention, the surface of the PVD multi-metal film reaches 40 degrees or less, and the droplet angle reaches 95 degrees or more, and since it is equipped with a micro-nano scale porous oil locking structure, it can possess excellent wear resistance and non-stick properties. In addition, if 5,000 planar wear resistance tests are conducted by adopting the Chinese national standard GB / T32095.2~2015, it can reach a non-stick Class I level. Brief explanation of the drawing

[0016] In order to more clearly explain the technical methods of the embodiments in the present invention, the drawings of the embodiments are briefly introduced below. In the description below, the drawings relate only to some embodiments of the present invention and do not limit the present invention. FIG. 1 is a cross-sectional view showing a non-stick metal tableware in Example 1. Figure 2 is an enlarged view of point A indicated in Figure 1. FIG. 3 is a schematic diagram of a non-stick structure showing a non-stick metal tableware in Example 1. Figure 4 is a surface shape diagram (500x) of a non-stick metal tableware in Example 1. Figure 5 is a surface shape diagram (1000x) of a non-stick metal tableware in Example 1. Figure 6 is a surface shape diagram (5000x) of a non-stick metal tableware in Example 1. Specific details for implementing the invention

[0017] To more clearly understand the purpose, technical methods, and advantages of the embodiments of the present invention, the present invention is described in more detail below in conjunction with the drawings. Assemblies of the embodiments of the present invention as typically described and illustrated in the drawings may be configured, arranged, and designed in various ways. All other embodiments obtained based on the embodiments of the present invention, under the premise that a person skilled in the art has not performed creative labor, fall within the scope of protection of the present invention.

[0018] Since similar symbols and characters represent similar items in the drawings below, if an item is defined in one drawing, there is no need to provide additional definitions or explanations for it in subsequent drawings.

[0019] Unless otherwise defined, technical or scientific terms used in this patent document refer to the general meaning that a person skilled in the art to which the invention pertains would understand. The terms “first,” “second,” and similar words used in the patent specification and claims of the invention do not indicate any order, quantity, or significance, but are used merely to distinguish different components. Likewise, similar words such as “one,” “one,” or “this” also mean at least one, without limiting the quantity. Similar words such as “include” or “include” do not exclude other elements or objects, while the element or object appearing before “include” or “include” includes the elements or objects listed after “include” or “include” and their equivalents. It is used only to indicate opposing positional relationships such as 'center', 'top', 'bottom', 'left', 'right', 'vertical', 'horizontal', 'inside', 'outside', 'far', and 'near', and the opposing positional relationships are changed correspondingly after the absolute position of the described object is changed. This is merely for the purpose of conveniently and briefly explaining the content of the invention and does not indicate or imply that all devices or elements indicated are necessarily configured and operated in a specific direction. Therefore, the invention should not be understood in a limited way.

[0020] Unless otherwise explicitly stated in the description of the present invention, the technical terms “mounting,” “interconnecting,” and “connecting” should be understood in a broad sense. Examples include fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, and connection within two components. A person skilled in the art should understand the above technical terms in their specific meanings as used in the present invention, based on the specific circumstances.

[0021] Some embodiments of the present invention are described in detail below in conjunction with the drawings. Assuming there are no conflicts in content, the features of the embodiments described below may be combined with one another.

[0022] Example 1:

[0023] In the non-stick metal tableware (100) illustrated in FIGS. 1 to 6, a first metal layer (101) and a second metal layer (102) are included, wherein the first metal layer (101) is arranged as an inner layer, and the inner surface of the first metal layer (101) is formed as a micro-scale roughening surface having micro-scale holes, and the micro-scale roughening surface is formed through sandblasting treatment, preferably manufactured by multi-stage sandblasting. In other embodiments, it may be treated by knurling. Here, a PVD multi-metal film (104) is plated on the micro-scale roughening surface, and micro-nano-scale holes are distributed in the PVD multi-metal film (104) to form a porous oil locking structure. The first metal layer (101) and the second metal layer (1020) are integrally combined by a thermal uniform layer (103), and the thermal uniform layer (103) has higher thermal conductivity than the first metal layer (101) so as to prevent damage to the PVD multi-metal film (104) due to overheating of a part of the first metal layer (101).

[0024] Physical Vapor Deposition (PVD) is one of the major surface treatment technologies. It involves adopting physical methods under vacuum conditions to vaporize the surface of a material source (solid or liquid) into gaseous atoms or molecules, or partially ionize them into ions, and then depositing a thin film with special functions onto the surface of a body through a low-pressure gas (or plasma) process. PVD coating technologies are classified into vacuum evaporation coating, vacuum sputter coating, and vacuum ion coating. Major methods of physical vapor deposition include vacuum evaporation, sputter coating, plasma coating such as electric arcs, ion coating, and molecular beam epitaxy. Corresponding vacuum coating equipment includes vacuum evaporation coating machines, vacuum sputter coating machines, and vacuum ion coating machines. Depending on the application, PVD coating technologies can be classified into tool plating and decorative plating. To ensure the thickness of the PVD multi-metal film, the present invention allows the PVD multi-metal film to reach 0.7 to 4.0 micrometers by using tool plating, preferably, the thickness of the PVD multi-metal film is 1.0 to 2.5 micrometers, specifically, the thickness of the PVD multi-metal film is 2.0 micrometers, and in another embodiment, 3 micrometers or 4 micrometers. It should be emphasized that the thickness of the PVD multi-metal film must be applicable to a micro-scale rough surface, and the thickness of the PVD metal film must be smaller than the Rz value of the micro-scale rough surface so that the PVD metal film can be attached to the micro-scale rough surface to form a micro-nano-scale porous oil lock structure, and without obscuring the micro-scale rough surface, in the present application, the micro-nano-scale porous oil lock structure is formed based on the micro-scale rough surface.

[0025] It is necessary to explain that the micro-nano scale porous oil lock structure is formed by depositing nitrides, carbides, and oxides of multi-metals (at least chromium and aluminum, and may further include titanium, copper, and iron) onto a micro-scale rough surface through PVD coating technology, and further forming micro-nano holes, such that the hole diameter of the micro-nano holes is within the range of 0.1 to 3.0 micrometers, and in this embodiment, it is 0.1 to 1.0 micrometers. The specific size of the micro-scale holes can be measured using the Axioplan 2 imaging microscope (model) of Carl Zeiss, and the size of the nano-scale holes can all be measured using the Nova 400 NanoSEM scanning electron microscope (model) of FEI (manufacturer) of the United States.

[0026] In one preferred embodiment, to extend the service life of the PVD multi-metal film (104), the non-stick metal tableware adopts an aluminum-steel composite structure, wherein the first metal layer (101) is a stainless steel layer, the thermal uniform layer (103) is an aluminum layer, and the second metal layer (102) is a stainless steel layer, and SUS430 may be cited as an example. The selected stainless steel is preferably food grade, and is particularly the first metal layer (101), such as SUS304 as an example. The second metal layer (102) mainly performs a protective function, and other metals such as titanium alloy may be selected in addition to stainless steel. To further enhance the non-stick effect of the inner surface, a plurality of etched concave grooves arranged on the inner surface are first etched, and then sandblasting treatment is performed. This concave groove can be manufactured using chemical etching or laser etching techniques, or by means such as knurling or texturing, and a micro-scale rough surface is formed on the surface of the etched concave groove. The concave groove arranged in a display can form a lotus leaf structure inside the non-stick metal tableware (100), thereby enhancing the non-stick effect.

[0027] In this embodiment, the micro-nano holes can contract according to changes in thermal temperature. When heating and seasoning a cooking utensil using animal or vegetable oil, the micro-nano holes expand as the temperature of the cooking utensil body rises and contract as the temperature of the cooking utensil body drops. More specifically, when the user heats the cooking utensil body, the micro-nano holes expand, facilitating the entry and exit of oil. When heating of the cooking utensil body is stopped, the temperature of the cooking utensil body gradually cools, causing the micro-nano holes to contract. The oil that has entered the holes is trapped inside, realizing an oil-locking function and maintaining the non-stick properties of the cooking utensil surface. In this embodiment, micro-nano holes with a hole diameter or opening width within the range of 0.1 to 1 μm possess excellent oil storage and oil-locking functions, thereby enhancing the non-stick effect of the cooking utensil surface. Refer to FIG. 3 for a specific drawing of the micro-nano holes. In the present invention, the micro-nano porous structure of the PVD multi-metal film can provide an excellent non-stick effect if the hydrophobic contact angle is 95° or greater after oil is stored.

[0028] In this embodiment, the PVD multi-metal film mainly comprises titanium, chromium, and aluminum. Here, the chromium content is 20 to 50 at%, the aluminum content is 50 to 70 at%, and the titanium content is 1 to 10 at%. When the titanium element content is between 1 and 10 at%, the surface energy can be effectively lowered, thereby improving the anti-sticking effect. Preferably, the titanium element content is 3 to 6 at%, and specifically, the titanium element content may be 3 at%. The aluminum element contained in the PVD multi-metal film can lower its surface energy, thereby improving the anti-sticking effect, and preferably, the aluminum content is about 30 at%. In addition to lowering the surface energy, the included chromium element can improve corrosion resistance to prevent heavy metal precipitation, and preferably, the chromium content is 50 at%. The PVD multi-metal film comprises a bottom layer, an intermediate layer, and a surface layer deposited in order from bottom to top. The above bottom layer comprises metallic titanium and / or metallic chromium. In the bottom layer, titanium and chromium exist in metallic form and are used to improve the adhesion between the PVD multi-metal film and the harmonizing surface, while simultaneously preventing heavy metal substances from precipitating from the first metal layer and affecting human health. Additionally, titanium and chromium can exist individually or simultaneously in the bottom layer to achieve the objectives of preventing adhesion and heavy metal precipitation, but possessing the performance of both titanium and chromium simultaneously is superior.

[0029] The intermediate layer comprises chromium aluminum nitrides and / or carbides, and may further comprise titanium nitrides and / or carbides. Specifically, it 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 multi-metals, a person skilled in the art may adjust it within the range described above. It should be noted that chromium aluminum nitrides and carbides may exist alone or simultaneously. In particular, chromium carbide can not only significantly improve the hardness, wear resistance, and corrosion resistance of the PVD multi-metal film, but also further improve the hydrophobicity of the PVD multi-metal film. In another embodiment, chromium carbide is added to the surface layer to further enhance the hydrophobicity of the PVD multi-metal film. Among the nitrides, titanium nitride possesses excellent thermal stability and good thermal shock resistance, while aluminum nitride, in its ceramic state, possesses excellent thermal conductivity, which can prevent damage caused by overheating of a portion of the PVD film. Chromium nitride possesses excellent corrosion resistance and can lower the coefficient of friction of the PVD film, thereby providing excellent wear resistance. Therefore, the combination of titanium, chromium, and aluminum nitrides and carbides provides higher hardness and wear resistance. Additionally, regarding the intermediate layer, since the PVD film of the present invention possesses excellent mechanical shock resistance and thermal shock resistance, the PVD film is not easily damaged even if a part is overheated or if tools such as a metal spatula are used directly for cooking. In this embodiment, the PVD multi-metal film possesses low surface energy while having high hardness and non-stick properties. Specifically, its hardness is HV 1000 to 5000, its surface energy is 40 dynes or less, and its droplet angle is 95 degrees or more.

[0030] Specifically, in this embodiment, the intermediate layer comprises chromium nitride and aluminum nitride, wherein the content of chromium nitride is 60 to 80 wt%, specifically 75 wt%. The content of aluminum nitride is 20 to 40 wt%, specifically 25 wt%. In another embodiment, the intermediate layer comprises chromium carbide, wherein the content of chromium carbide is 85 to 95 wt%. The remaining components are a combination of one or two of aluminum nitride and titanium nitride, and may further include components such as aluminum carbide. The surface layer comprises metallic copper and aluminum oxide, wherein the content of metallic copper is 1.0 to 10 wt%, specifically 5 wt%. The above surface layer further comprises iron oxide, and the content of the iron oxide is 3 to 15 wt%, specifically 10 wt%, and may be 5 wt% or 12 wt%. wt% is a mass percentage. The content of other components and impurities in the surface layer, excluding metallic copper, aluminum oxide, and iron oxide, is less than 5 wt%.

[0031] In this embodiment, the PVD film is a non-stick metal film layer composed of chromium and aluminum as main elements. The aluminum element contained in the PVD multi-metal film can lower its surface energy, thereby improving the anti-sticking effect. In addition to lowering surface energy, the included chromium element can improve corrosion resistance, which can prevent heavy metal precipitation. In the PVD multi-metal film of this embodiment, the main metal components are titanium, aluminum, chromium, iron, and copper, and the non-metal components mainly include oxygen, carbon, nitrogen, and silicon.

[0032] The surface layer may further include oxides of titanium and chromium, specifically, one of the oxides containing at least titanium and chromium, for example, titanium oxide or a combination of titanium oxide and chromium oxide. Due to this combination of metallic copper and aluminum oxide (a combination of metallic copper and aluminum-iron oxide), the surface layer can possess excellent non-stick performance. Since a layer of oxide film can be formed on the surface of the PVD film, discoloration problems can be prevented during subsequent use. At the same time, aluminum oxide can prevent the metallic copper from oxidizing to form toxic copper oxide.

[0033] Metallic copper may be added to the PVD multi-metal film, and this PVD multi-metal film has an antibacterial effect, and when the copper content is 10 wt% or less, the anti-sticking effect of the PVD multi-metal film can be further improved.

[0034] In this embodiment, the bottom layer is attached to a micro-scale rough surface and the surface layer is attached to the surface of the intermediate layer, and the thicknesses of both the surface layer and the bottom layer are relatively small, specifically 0.1 to 1 μm, specifically 0.3 μm in this embodiment, and 0.5 μm or 0.8 μm in other embodiments. The thickness of the intermediate layer is 5 to 6.8 μm, specifically 6.4 μm.

[0035] The inner surface of the PVD multi-metal film (104) is a polished surface, and can be polished by adopting, for example, high-pressure water polishing or other methods. The thickness range of the PVD multi-metal film (104) is 0.7 to 6.0 μm, and preferably, the thickness range of the PVD multi-metal film (104) is 2 to 5 μm, and specifically, the thickness range of the PVD multi-metal film (104) is 2 μm.

[0036] Based on the technical details described above, for the purpose of constructing a porous oil-locking structure with low surface energy, a person skilled in the art may mix the ratios of each component according to actual needs, and additionally, based on the multi-metal described above, other metal or non-metal components may be added, for example, if silicon is added further, iron silicide with a high melting point is formed. Through inspection, the hardness range of the PVD multi-metal film (104) is HV 1000 to 5000, preferably, the hardness range of the PVD multi-metal film (104) is HV 1100 to 3500, and more preferably HV 2000 to 3500. Since the PVD multi-metal film has relatively low surface energy but its hardness and wear resistance are excellent, the present invention has beneficial effects such as excellent anti-sticking effect, high hardness, excellent wear resistance, and long service life.

[0037] In this embodiment, the wear resistance of the PVD multi-layer metal film (104) was obtained by conducting a wear resistance test 5,000 times in accordance with the Chinese national standard "GB / T32095.2~2015 Non-stick Surface Performance and Test Standards for Household Food Metal Cookware Part 2: Non-stick and Wear Resistance Test Standards" and then performing an egg frying test without oil, thereby obtaining a non-stick grade of I. Here, grade I means that the egg can be removed without damage using a plastic spatula and no residue is left. Grade II means that the egg cannot be removed without damage using a plastic spatula, but residue can be removed by lightly wiping with a wet sponge or dishcloth. In the present invention, the non-stick performance of the non-stick metal cookware (100) is grade I. As a result of long-term testing in the laboratory, the grade I eggs are 7 to 9, and the highest record is 20 grade I eggs, which significantly exceeds the requirement of 3 eggs according to the Chinese standard.

[0038] The present invention further provides a PVD multi-layer metal film (104) and a non-stick cooking tool (100), wherein the cooking tool refers to the non-stick metal tableware (100) described above. The non-stick cooking tool can be used as a frying pan, and can have chromium carbide as a surface layer and be used as an inner container such as an electric pot or a pressure cooker.

[0039] It can be understood from the above description that the present invention has the following beneficial effects.

[0040] In the PVD multi-layer metal film (104) non-stick metal tableware (100) and PVD multi-layer metal film (104) non-stick cooking tool (100) of the present invention, the PVD multi-layer metal film (104) is further deposited on the rough surface of the inner layer metal, and since the thickness of the PVD multi-layer metal film (104) can be controlled, the micro-scale holes on the micro-scale rough surface become micro-nano-scale holes, so the inner layer metal surface has an excellent non-stick effect. However, during use, the bottom part of the cooking tool may easily overheat in part, causing damage to the PVD multi-layer metal film (104) and the cooking tool may lose its non-stick performance. To solve this technical problem, the cooking tool of the present invention installs an aluminum thermal uniform layer (103) between two layers of metal, and due to the aluminum thermal uniform layer (103), the bottom part of the cooking tool can receive heat more uniformly, thereby extending the non-stick life of the cooking tool.

[0041] In conclusion, the non-stick metal tableware (non-stick cooking tool) (100) of the present invention has excellent non-stick performance and has achieved a non-stick Grade I level after 5,000 wear resistance tests. In addition, since the bottom part of the cooking tool can receive heat uniformly, the lifespan of the non-stick performance can be further extended. Furthermore, all materials used in the present invention satisfy the requirements of food hygiene indicators and do not contain heavy metals harmful to the human body, making them safe and harmless to the human body.

[0042] The details described above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. A person skilled in the art can easily make modifications and substitutions within the technical scope described in the present invention, and such modifications fall within the scope of protection of the present invention. Accordingly, the scope of protection of the present invention is based on the scope of protection of the claims. Explanation of the symbols

[0043] 100: Non-stick cooking utensils (non-stick metal tableware) 101: First metal layer 102: Second metal layer 103: Thermal uniform layer 104: PVD multi-component metal film

Claims

Claim 1 In a non-stick metal tableware, the main body is included; A micro-scale roughening surface is formed on the inner surface of the main body; a PVD (Physical Vapor Deposition) multi-metal film is attached to the micro-scale roughening surface, and the PVD multi-metal film is arranged so that a micro-nano scale porous oil locking structure with low surface energy can be formed on the micro-scale roughening surface; the main body includes a first metal layer, a thermal uniformity layer, and a second metal layer in order from inside to outside, and the first metal layer and the second metal layer are integrally composited by the thermal uniformity layer so that the first metal layer is heated uniformly, the first metal layer is a stainless steel layer, the thermal uniformity layer is an aluminum layer, and the second metal layer is a stainless steel layer, and the PVD multi-metal film includes a bottom layer, an intermediate layer, and a surface layer deposited in order from the first metal layer upward, the bottom layer includes metallic titanium and metallic chromium, the intermediate layer includes chromium nitride and aluminum nitride, the content of the chromium nitride is 60 to 80 wt%, and the A non-stick metal tableware characterized in that the aluminum nitride content is 20 to 40 wt%; the surface layer comprises metallic copper and aluminum oxide, and the metallic copper content is 1.0 to 10 wt%. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 A non-stick metal tableware according to claim 1, characterized in that the thickness range of the PVD multi-metal film is 0.7 to 4.0 μm. Claim 7 A non-stick metal tableware according to claim 1, characterized in that the thickness of the surface layer is 0.1 to 1.0 μm. Claim 8 A non-stick metal tableware according to claim 1, characterized in that the hardness range of the PVD multi-component metal film is HV 1100 to 3500. Claim 9 A non-stick metal tableware according to claim 1, characterized in that the surface energy of the PVD multi-component metal film is 40 dynes or less, and the hydrophobic angle after oil is stored therein is 95 degrees or more. Claim 10 A non-stick metal tableware according to claim 1, characterized in that the PVD multi-component metal film has been subjected to 5,000 flat abrasion resistance tests in accordance with Chinese national standards GB / T32095.2–2015, and the grade of the evaluation result of a non-stick egg frying test is Grade I. Claim 11 A non-stick metal tableware according to claim 1, characterized in that a concave groove is distributed on the inner side of the main body and the rough surface is formed in the concave groove. Claim 12 delete Claim 13 delete Claim 14 delete

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