Antibacterial non-stick pan and preparation method

Abstract

The present invention provides an antibacterial non-stick pan and a method for preparing the same. A roughened surface having a concave-convex structure is formed on one surface of a metal sheet by chemical etching or mechanical pressing. An antibacterial coating is applied to the roughened surface. After application, the roughened surface is turned downward and the antibacterial coating is cured. Under the action of gravity, the antibacterial coating wraps around the ridge in a teardrop-like shape, forming a protrusion at the top of the ridge. After the antibacterial coating is cured, a non-stick coating is applied. The non-stick coating fills the concave portion of the sheet surface, with the surface of the concave portion of the non-stick coating being higher than the top of the ridge and lower than the protrusion formed at the top of the ridge. After the non-stick coating is cured, the protrusion above the concave portion is polished off, exposing the antibacterial coating above the ridge. The exposed area of the antibacterial coating is 6% to 12% of the surface area of the non-stick coating. The polished metal sheet is then fabricated into a pan. This achieves a good antibacterial effect on the non-stick pan.

Description

Technical Field

[0001] The present invention relates to the field of kitchenware, and in particular to a method for preparing an antibacterial non-stick pan. Background Art

[0002] In the food industry, food safety and health have become people's pursuit of goals, and eating with peace of mind has become people's most basic needs. However, it is well known that due to the particularity of the food industry, currently commonly used antimicrobial technologies cannot solve the antimicrobial problems in the food industry.

[0003] Non-stick pans are increasingly replacing traditional iron pans and entering more and more households. Non-stick pans achieve this by forming a non-stick coating on the pan itself. These pans overcome the aforementioned shortcomings of traditional iron pans and are easy to clean, removing food residue with a simple wipe. They also allow for easy frying and stir-frying without sticking to the bottom, minimizing oil use and keeping kitchens clean and smoke-free. Furthermore, cooking with non-stick pans can help reduce fat intake, aligning with modern trends and health needs for low-fat, low-calorie diets.

[0004] Currently, non-stick pans are more common in the market, and pans with antibacterial functions are also under continuous research and development. However, there is currently no good solution on the market to achieve antibacterial functions on non-stick pans. Summary of the Invention

[0005] In order to solve the above problems, an antibacterial non-stick pan and a preparation method thereof are provided to achieve good antibacterial effect on the non-stick pan.

[0006] A method for preparing an antibacterial non-stick pan comprises the following steps:

[0007] On one surface of the metal plate, a rough surface is formed by chemical etching or mechanical pressing. The rough surface has a concave-convex structure, the area of the concave region accounts for 90% to 95% of the area of the entire concave-convex structure, and the area of the top of the ridge accounts for 5% to 10% of the area of the entire concave-convex structure.

[0008] The antibacterial coating is applied on the rough surface. After the antibacterial coating is applied, the rough surface is turned downward and the antibacterial coating is cured so that the antibacterial coating wraps the ridge in a water drop shape under the action of gravity, and the antibacterial coating forms a protrusion on the top of the ridge.

[0009] After the antibacterial coating is cured, the non-stick coating is applied to fill the concave portion of the plate surface, and the surface of the concave portion of the non-stick coating is higher than the top of the ridge on the plate surface and lower than the ridge top formed by the antibacterial coating.

[0010] After the non-stick coating is cured, the protrusions above the concave surface are polished off to expose the antibacterial coating above the ridges. The area of the antibacterial coating exposed on the surface is 6% to 12% of the surface area of the non-stick coating.

[0011] The polished metal sheets are made into pots.

[0012] The antibacterial coating is made of nano-antibacterial material and porous material. The antibacterial material includes nano-silver and nano-zinc. The weight ratio of the nano-silver and nano-zinc is 1:0.8-2. The porous material includes diatomaceous earth, silicon carbide, calcium carbonate and mica powder.

[0013] The antibacterial coating is specifically prepared by mixing 90-110 parts of diatomaceous earth, 90-110 parts of silicon carbide, 20-25 parts of calcium carbonate, 18-22 parts of mica powder, 18-22 parts of antibacterial material and 45-55 parts of water in parts by weight.

[0014] The particle size of the antimicrobial material is preferably in the range of 25 nm to 500 nm.

[0015] The surface of the concave-convex structure after chemical etching or laser etching is naturally rough, which is more conducive to the adhesion of non-stick coating or antibacterial coating.

[0016] In the above step 2, the top of the antibacterial coating is preferably 30-50 microns higher than the top of the ridge.

[0017] In the above step 3, after the non-stick coating is applied, the top of the antibacterial coating is preferably 10-20 microns higher than the surface of the non-stick coating in the concave portion.

[0018] An antibacterial non-stick pan is prepared by the method.

[0019] The benefits of this application lie in: the antibacterial coating forms a protrusion on the top of the ridge through the concave-convex structure. The protrusion is then applied to the non-stick coating, and the antibacterial coating is exposed after the protrusion is polished off to achieve the antibacterial function. Furthermore, the proportion of the antibacterial coating on the surface is controlled to achieve both antibacterial function and non-stick effect.

[0020] The concave-convex structure design allows the non-stick coating to fit better with the pot body, effectively preventing the non-stick coating from bulging and wrinkling under high temperature conditions.

[0021] By forming an inverted teardrop-shaped antibacterial coating on the ridges, applying a non-stick coating, and then grinding away the protruding parts, the final antibacterial coating is similar to the shape of a tree root rooted in the non-stick coating, with the exposed part to achieve the antibacterial function.

[0022] A novel antimicrobial coating formula combines the antimicrobial properties of nanosilver and nanozinc, blended in a specific ratio to enhance the antimicrobial effect. Diatomaceous earth, silicon carbide, calcium carbonate, and mica powder serve as porous materials to better disperse the nanosilver and nanozinc. The addition of a specific amount of water allows the antimicrobial coating to form a droplet-like structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the concave-convex structure of Example 1 of the present invention;

[0024] Figure 2 Schematic diagram of the structure of Example 1 of the present invention after coating with an antibacterial coating;

[0025] Figure 3 Schematic diagram of the structure of Example 1 of the present invention after coating with a non-stick coating;

[0026] Figure 4 Schematic diagram of the structure of Example 1 of the present invention after polishing. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0030] Example 1

[0031] Referring to the accompanying drawings of the present invention Figures 1 to 4As shown, according to the present invention, the method for preparing an antibacterial non-stick pan is preferably implemented to manufacture an antibacterial non-stick pan. Types of non-stick pans may include boiling pans, frying pans, woks, milk pans, etc. This embodiment takes a wok as an example. The antibacterial non-stick pan includes a pan body 1. The pan body 1 may be single-layer or multi-layer. This embodiment takes a single-layer as an example. The pan body material may be iron or stainless steel. The alloying elements in stainless steel are Cr, Ni, Ti, Mn, N, Nb, Mo, Si, Cu, etc., among which Cr is the main alloying element. The specific preparation method is as follows:

[0032] Preparation of the concave-convex structure: A roughened surface is created on one surface of an iron or stainless steel sheet 1 by chemical etching or mechanical pressing. The cross-section of the ridges 2 of the concave-convex structure can be circular or other irregular shapes, preferably quasi-circular. The concave-convex structure can be formed by chemical etching or engraving. Chemical etching can create an irregular surface that facilitates the adhesion of the antibacterial coating and non-stick coating to the iron or stainless steel sheet, thereby increasing the coating's firmness. Laser engraving is more conducive to controlling the shape of the ridges, and can create teardrop-shaped protrusions that facilitate the formation of the antibacterial coating. After chemical etching or mechanical engraving, the top area of the ridges 2 accounts for 6% to 8% of the total area of the concave-convex structure.

[0033] Preparation of the antibacterial coating: Nanosilver and nanozinc with a particle size of 50 nanometers are weighed and mixed uniformly in a weight ratio of 1:1.8 as the antibacterial material. An antibacterial coating is prepared by mixing 100 parts diatomaceous earth, 100 parts silicon carbide, 20 parts calcium carbonate, 20 parts mica powder, 20 parts antibacterial material, and 50 parts water. The antibacterial coating is applied to a rough surface, facing downward, and allowed to cure to form an antibacterial coating. Under the influence of gravity, the antibacterial coating wraps around the ridge in a droplet-like pattern, forming a protrusion at the top of the ridge.

[0034] Preparation of non-stick coating: After the antibacterial coating is cured, apply the non-stick coating. The non-stick coating fills the concave part of the board surface, and the surface of the concave part of the non-stick coating is higher than the top of the ridge on the board surface and lower than the ridge formed by the antibacterial coating. The top of the antibacterial coating is 30-50 microns higher than the top of the ridge.

[0035] Polishing: After the non-stick coating is cured, polish off the protrusions above the concave surface to expose the antibacterial coating above the ridges. The area of the antibacterial coating exposed on the surface is 6% to 12% of the surface area of the non-stick coating.

[0036] Pressing: The polished metal sheet is pressed into the pot.

[0037] Example 2

[0038] The area of the antibacterial coating exposed on the surface does not account for 6% of the coating surface area, and the rest is the same as in Example 1.

[0039] Example 3

[0040] The top area of the ridge 2 accounts for 8% of the area of the entire concave-convex structure, and the rest is the same as in Example 1.

[0041] Comparative Example 1

[0042] The area of the antibacterial coating exposed on the surface does not account for 4% of the coating surface area, and the rest is the same as in Example 1.

[0043] Comparative Example 2

[0044] The area of the antibacterial coating exposed on the surface does not account for 20% of the coating surface area, and the rest is the same as in Example 1.

[0045] Comparative Example 3

[0046] The antibacterial material is pure nanosilver, and the rest is the same as in Example 1.

[0047] Comparative Example 4

[0048] The antibacterial material is pure nano zinc, and the rest is the same as in Example 1.

[0049] Comparative Example 5

[0050] The pot body is not treated with bumps, and the antibacterial coating is sprayed in dots on the non-stick coating surface.

[0051] Performance testing

[0052] 1. Antibacterial test

[0053] The test method for the antibacterial performance of the coating (calculated by colony count) is based on the GB15981-1995, Q / 02GZS001 test method and standard. The antibacterial performance of the coating is evaluated by measuring the antibacterial rate of Escherichia coli and Staphylococcus aureus.

[0054] 2. Wear resistance test

[0055] The wear resistance of the non-stick pan coatings of Examples 1-10 and Comparative Examples 1-4 was tested using the method provided in standard GB / T 1768-1979. The total load weight was 500 g, the grinding wheel rotation number was set to 300, and the weight loss of the paint film was tested.

[0056] 3. Heat resistance test

[0057] The heat resistance of non-stick pan coatings was tested according to the method described in GB / T 1735-2009 "Determination of Heat Resistance of Paints and Varnishes". The temperature was raised by 10°C each time and maintained for 10 minutes. The temperature at which abnormal phenomena such as bubbling, melting, and cracking appeared on the coating was observed.

[0058]

[0059]

[0060] Any embodiment of the present application can be used as an independent technical solution or in combination with other embodiments. All patents and publications mentioned in this application specification indicate that they are public technologies in the field and can be used in this application. All patents and publications cited here are also listed in the references, just as each publication is specifically cited individually. The present application can be implemented in the absence of any element or elements, one limitation or multiple limitations, where such limitations are not specifically stated. The terms and expressions used here are descriptive and not limiting, and there is no intention to indicate that the terms and explanations described in this book exclude any equivalent features. However, it is understood that any appropriate changes or modifications can be made within the scope of this application and the claims. It is understood that the embodiments described in this application are examples and features of some embodiments. Any person skilled in the art can make some changes and modifications based on the essence of the description of this application, and these changes and modifications are also considered to fall within the scope of this application and the scope of the independent claims and appended claims.

Claims

1. A method for preparing an antibacterial non-stick pan, characterized in that: The steps include: On one surface of the metal plate, a rough surface is formed by chemical etching or mechanical pressing, wherein the rough surface has a concave-convex structure, the area of the concave region accounts for 90% to 95% of the area of the entire concave-convex structure, and the area of the ridge accounts for 5% to 10% of the area of the entire concave-convex structure; 1) applying an antibacterial coating on the rough surface, placing the rough surface downward and curing the antibacterial coating so that the antibacterial coating wraps around the ridge in a water drop shape under the action of gravity, and the antibacterial coating forms a protrusion on the top of the ridge; 2) After the antibacterial coating is cured, a non-stick coating is applied. The non-stick coating fills the concave portion of the board surface, and the surface of the non-stick coating concave portion is higher than the top of the ridge on the board surface and lower than the antibacterial coating to form a protrusion on the top of the ridge; the top of the antibacterial coating is 30-50 microns higher than the top of the ridge; 3) After the non-stick coating is cured, grind off the protrusions above the concave surface to expose the antibacterial coating above the ridges. The area of the antibacterial coating exposed on the surface is 6% to 12% of the surface area of the non-stick coating. After applying the non-stick coating, the top of the antibacterial coating is 10-20 microns higher than the surface of the concave non-stick coating; 4) Making cookware from the polished metal sheets; The antibacterial coating is made of nano-antibacterial material and porous material. The antibacterial material includes nano-silver and nano-zinc. The weight ratio of the nano-silver to the nano-zinc is 1:0.8-2. The porous material includes diatomaceous earth, silicon carbide, calcium carbonate and mica powder.

2. The method for preparing the antibacterial non-stick pan according to claim 1, wherein: The antibacterial coating is prepared by mixing 90-110 parts of diatomaceous earth, 90-110 parts of silicon carbide, 20-25 parts of calcium carbonate, 18-22 parts of mica powder, 18-22 parts of antibacterial material and 45-55 parts of water in parts by weight.

3. The method for preparing the antibacterial non-stick pan according to claim 1, wherein: The particle size of the antibacterial material is in the range of 25 nm to 500 nm.

4. The method for preparing the antibacterial non-stick pan according to claim 1, wherein: After the chemical etching or laser etching, the surface of the concave-convex structure is in a naturally rough state.

5. An antibacterial non-stick pan prepared by any one of claims 1-4.

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