Non-stick coating and preparation method thereof as well as pot and cooking equipment

A non-stick coating and pot technology, applied in coatings, household appliances, kitchen utensils, etc., can solve the problems of high pre-treatment requirements, short service life, low hardness of the film layer, etc., and achieve good durability and service life. The effect of long, low coating porosity

Pending Publication Date: 2018-11-02
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the rice cooker industry, non-stick coating has become a key factor affecting the quality of rice cookers. The types of low-end non-stick coatings on the market are divided into PTFE, ceramic non-stick coatings, and PFA non-stick coatings used in high-end rice cookers. , the full name of PFA is the copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The current preparation method is electrostatic spraying. It is easy to form miscellaneous defects on the sprayed surface, and electrostatic spraying is similar to air pressure spraying. It needs to spray primer before spraying powder, and some need to spray primer and medium oil before preparing powder surface layer. The process is complicated
[0003] At present, the spraying of non-stick coatings is all sprayed with compressed air, which can only cause poor bonding force through intermolecular attraction
In addition, with this spraying method, the thickness of the film layer can only be 20-60 μm. If it is too thick, it will cause defects such as cracking, foaming, and oil accumulation in the film layer; if it is too thin, the film layer will have low hardness and wear resistance. Poor, resulting in short service life

Method used

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  • Non-stick coating and preparation method thereof as well as pot and cooking equipment
  • Non-stick coating and preparation method thereof as well as pot and cooking equipment
  • Non-stick coating and preparation method thereof as well as pot and cooking equipment

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0077] (1) 47.6kg of common PFA powder, 0.4kg of polyvinyl alcohol, 2kg of glycerin and 50kg of water are mixed to prepare a slurry;

[0078] (2) The slurry is subjected to airflow atomization drying treatment, wherein the conditions of airflow atomization drying include: the atomization pressure is 0.4MPa, and the atomization air flow rate is 2m 3 / h, the inlet temperature is 320°C, and the outlet temperature is 100°C to obtain modified PFA powder S1.

[0079] It is determined that the particle size D50 of the modified PFA powder is 52 μm, the sphericity of 96% of the powder is 95%, the fluidity is 15s / 50g, and the purity is 99.9%. The microscopic morphology of the modified PFA powder is shown in figure 1 shown.

preparation example 2

[0081] (1) 54.8kg common PFA powder, 0.2kg polyvinyl chloride, 3kg paraffin and 42kg water are mixed to prepare slurry;

[0082] (2) The slurry is subjected to airflow atomization drying treatment, wherein the conditions of airflow atomization drying include: the atomization pressure is 0.3MPa, and the atomization air flow rate is 1m 3 / h, the inlet temperature is 300°C, and the outlet temperature is 60°C to obtain modified PFA powder S2.

[0083] It is determined that the particle size D50 of the modified PFA powder is 46 μm, the sphericity of 95% of the powder is 93%, the fluidity is 13s / 50g, and the purity is 99.5%.

preparation example 3

[0085] (1) 38.5kg common PFA powder, 0.5kg polyacrylate, 1kg graphite and 60kg water are mixed to prepare slurry;

[0086] (2) The slurry is subjected to airflow atomization drying treatment, wherein the conditions of airflow atomization drying include: the atomization pressure is 0.5MPa, and the atomization air flow rate is 3m 3 / h, the inlet temperature is 350°C, and the air outlet temperature is 140°C to obtain modified PFA powder S3.

[0087] It is determined that the particle size D50 of the modified PFA powder is 59 μm, the sphericity of 95% of the powder is 98%, the fluidity is 18s / 50g, and the purity is 99.9%.

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Abstract

The invention relates to the technical field of electro thermal equipment, and discloses a non-stick coating and a preparation method thereof as well as a pot and a cooking device. The method comprises the following steps of: (1) pretreating a substrate; (2) carrying out pre-heating treatment on the surface of the substrate obtained in the step (1); (3) performing cold spraying treatment on the substrate with the mixed powder of the metal powder and the polymer powder to form a non-stick coating on the surface of the substrate. The non-stick coating has the advantages of high surface hardness,high coating binding force, good scratch resistance, good corrosion resistance, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of electric heating appliances, in particular to a non-stick coating, a preparation method thereof, pots and cooking equipment. Background technique [0002] At present, in the rice cooker industry, non-stick coatings have become a key factor affecting the quality of rice cookers. The types of low-end non-stick coatings on the market are divided into PTFE, ceramic non-stick coatings, and PFA non-stick coatings used in high-end rice cookers. , the full name of PFA is the copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The current preparation method is electrostatic spraying. It is easy to form miscellaneous defects on the sprayed surface, and electrostatic spraying is similar to air pressure spraying. It needs to spray primer before spraying powder, and some need to spray primer and medium oil before preparing powder surface layer, and the process is complicated. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J36/02B05D5/08B05D7/14B05D1/12
CPCA47J36/025B05D1/12B05D5/08B05D5/083B05D7/14B05D2601/28
Inventor 曹达华李康李兴航杨玲李洪伟屈雪平肖北阳
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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