Coating for non-stick pan and non-stick pan

Abstract

The invention provides a coating for a non-stick pan and the non-stick pan, and relates to the technical field of non-stick pans, and the coating comprises polytetrafluoroethylene, PMMA coated nano-silver, a polyether-ether-ketone-polyimide blend, fluororubber, silicon resin, ceramic powder, metal oxide, carbon fiber or graphite. According to the coating for the non-stick pan, the wear resistance and the heat stability of the coating are enhanced, the friction coefficient of the coating is reduced, in addition, the wear resistance of the coating is further enhanced by adding the PMMA-coated nano-silver and the polyether-ether-ketone-polyimide blend, and meanwhile, the non-stick pan also has good antibacterial performance.

Description

Technical Field

[0001] The present invention relates to the technical field of non-stick pans, in particular to a coating for non-stick pans and a non-stick pan. Background Art

[0002] Most existing cookware is made of stainless steel. However, due to the inherent performance limitations of ordinary stainless steel, its strength and hardness decrease at high temperatures, making the surface of the pot easily scratched. Damaged pots are prone to sticking, causing food to burn, affecting both the taste and the health of diners. Furthermore, pots with damaged exteriors are difficult to clean, causing inconvenience during cooking.

[0003] In order to solve the above problems, we propose a coating for non-stick pans and a non-stick pan to solve the above problems. Summary of the Invention

[0004] In order to solve the problems in the background technology, the present invention provides a coating for a non-stick pan and a non-stick pan.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A coating for a non-stick pan comprises the following ingredients: 40-60 parts of polytetrafluoroethylene, 5-10 parts of PMMA-coated nanosilver, 10-20 parts of polyetheretherketone-polyimide blend, 5-15 parts of fluororubber, 5-10 parts of silicone resin, 10-20 parts of ceramic powder, 3-8 parts of metal oxide, and 1-5 parts of carbon fiber or graphite.

[0006] Preferably, a coating for a non-stick pan, the production method comprises the following steps: S1. Weigh the raw materials according to the formula ratio, then add 0.5-2 parts of dispersant and 20-40 parts of solvent and mix; S2, making a uniform slurry by ball milling or sand milling; S3. Add resin and additives and stir evenly to form a mixed liquid.

[0007] Preferably, in step S3, the auxiliary agent includes 2-5 parts of a curing agent, 0.5-1 part of a leveling agent, and 0.5-1 part of an antioxidant.

[0008] Preferably, a non-stick pan has the following production process: the coating mixture formed in step S3 is evenly sprayed on the surface of the stainless steel pan substrate by a high-pressure spray gun, with the thickness controlled at 20-50 μm; then the following processes are sequentially performed for curing: drying at room temperature for 10-30 minutes, low-temperature baking at 80-120°C for 1 hour, and high-temperature curing at 350-400°C for 0.5-1 hour to cross-link the resin and remove the solvent to form a dense coating, so that the coating is firmly bonded to the stainless steel pan substrate, and finally polishing and grinding to make a non-stick pan.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The coating of the non-stick pan of the present invention enhances the wear resistance and thermal stability of the coating and reduces the friction coefficient of the coating. In addition, by adding PMMA-coated nanosilver and polyetheretherketone-polyimide blend, the wear resistance of the coating is further enhanced, and the non-stick pan also has good antibacterial properties. DETAILED DESCRIPTION

[0010] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Example: A coating for a non-stick pan comprises the following ingredients: 40-60 parts of polytetrafluoroethylene, 5-10 parts of PMMA-coated nanosilver, 10-20 parts of polyetheretherketone-polyimide blend, 5-15 parts of fluororubber, 5-10 parts of silicone resin, 10-20 parts of ceramic powder, 3-8 parts of metal oxide, and 1-5 parts of carbon fiber or graphite.

[0011] Its production method comprises the following steps: S1. Weigh the raw materials according to the formula ratio, then add 0.5-2 parts of dispersant and 20-40 parts of solvent and mix; S2, making a uniform slurry by ball milling or sand milling; S3. Add resin and additives and stir evenly to form a mixed liquid.

[0012] Wherein, in step S3, the auxiliary agent includes 2-5 parts of curing agent, 0.5-1 part of leveling agent and 0.5-1 part of antioxidant.

[0013] A non-stick pan has the following production process: using a high-pressure spray gun to evenly spray the coating mixture formed in step S3 onto the surface of a stainless steel pan substrate, with a thickness controlled at 20-50 μm; then performing the following curing processes in sequence: drying at room temperature for 10-30 minutes, baking at 80-120°C for 1 hour, and curing at 350-400°C for 0.5-1 hour, to crosslink the resin and remove the solvent, forming a dense coating that is firmly bonded to the stainless steel pan substrate; and finally polishing and grinding to produce the non-stick pan.

[0014] The effects of the raw materials of each formula are as follows: 1. Polytetrafluoroethylene; Characteristics: It possesses excellent chemical resistance, high and low temperature resistance (-200°C to 260°C), and a low coefficient of friction, contributing to the non-stick properties of non-stick pans. However, its wear resistance is poor when used alone, requiring compounding with other materials.

[0015] 2. PMMA coated nanosilver; Characteristics: PMMA-coated nanosilver is a microsphere with a polymethyl methacrylate (PMMA) shell and a core of nanosilver particles. The PMMA layer improves the compatibility of the nanosilver particles with the polymer, solving the problem of easy agglomeration of the nanosilver particles. Nanosilver in the formula primarily plays an antibacterial and antimicrobial role.

[0016] 3. Polyetheretherketone-polyimide blend; Characteristics: Polyetheretherketone (PEEK)-polyimide (PI) blends are mechanically blended. PEEK exhibits physical and chemical properties such as high-temperature resistance and chemical corrosion resistance, making it suitable for use as a high-temperature structural material. Furthermore, PEEK is self-extinguishing, achieving UL94 V-0 rating even without the addition of any flame retardants. Polyimide exhibits excellent heat and low-temperature resistance, mechanical properties, and chemical stability. PEEK-PI blends exhibit superior high-temperature resistance and a lower coefficient of friction than the original resins. Furthermore, the blended polymer exhibits excellent flame retardancy.

[0017] 4. Fluororubber; Features: Improve coating flexibility and adhesion, enhance weather resistance and wear resistance, and improve PTFE film-forming properties.

[0018] 5. Silicone resin; Features: Improve the high temperature resistance (up to 300°C and above) and scratch resistance of the coating, while enhancing the bonding strength with the substrate.

[0019] 6. Ceramic powder (such as alumina, silica); Features: Increases coating hardness and wear resistance to prevent scratches during use, while improving heat conduction efficiency to make the pots and pans heated more evenly.

[0020] 7. Metal oxides (such as titanium oxide, zinc oxide); Features: Optimizes the chemical stability of the coating. Some oxides (such as zinc oxide) also have antibacterial effects, improving product safety.

[0021] 8. Carbon fiber or graphite; Features: Enhance the mechanical strength and thermal conductivity of the coating, reduce the thermal expansion coefficient, and reduce the risk of coating cracking.

[0022] 9. Dispersant ingredients: silicone or fluorocarbon surfactants; Function: Promote the uniform dispersion of solid particles such as PTFE and ceramic powder in the solvent, avoid agglomeration, and ensure uniform coating thickness.

[0023] 10. Solvent composition: fluorocarbon solvent (such as FC-40), alcohol (such as ethanol) or water; Function: dissolve resin and adjust the viscosity of paint to facilitate spraying or brushing construction, and evaporate and remove after film formation.

[0024] 11. Curing agent ingredients: amine or peroxide (select according to resin type); Function: Cross-linking reaction occurs with silicone resin or fluororubber, solidifying into a film and improving the hardness and solvent resistance of the coating.

[0025] 12. Leveling agent ingredients: acrylates; Function: Improve the surface smoothness of the coating, reduce brush marks or spray defects, and enhance the uniformity of the "non-stick" effect.

[0026] 13. Antioxidant ingredients: phenolic or amine antioxidants; Function: Delay the aging of the coating under high temperature and ultraviolet radiation and extend its service life.

[0027] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating for a non-stick pan, characterized in that: Includes the following ingredients: 40-60 parts of polytetrafluoroethylene, 5-10 parts of PMMA-coated nanosilver, 10-20 parts of polyetheretherketone-polyimide blend, 5-15 parts of fluororubber, 5-10 parts of silicone resin, 10-20 parts of ceramic powder, 3-8 parts of metal oxide and 1-5 parts of carbon fiber or graphite.

2. The coating for non-stick pan according to claim 1, characterized in that: The production method comprises the following steps: S1. Weigh the raw materials according to the formula ratio, then add 0.5-2 parts of dispersant and 20-40 parts of solvent and mix; S2, making a uniform slurry by ball milling or sand milling; S3. Add resin and additives and stir evenly to form a mixed liquid.

3. The coating for non-stick pan according to claim 2, characterized in that: In step S3, the auxiliary agent includes 2-5 parts of curing agent, 0.5-1 part of leveling agent and 0.5-1 part of antioxidant.

4. A non-stick pan, characterized by: The coating for a non-stick pan according to any one of claims 1 to 3 is produced by uniformly spraying the coating mixture formed in step S3 onto the surface of a stainless steel pan substrate using a high-pressure spray gun, with a thickness controlled to be 20-50 μm; Then carry out the following processes in sequence for curing: drying at room temperature for 10-30 minutes, low-temperature baking at 80-120℃ for 1 hour, and high-temperature curing at 350-400℃ for 0.5-1 hour to cross-link the resin and remove the solvent to form a dense coating, so that the coating is firmly bonded to the stainless steel pot substrate, and finally polishing and grinding are carried out to make a non-stick pan.