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Non-stick coating and preparation method thereof as well as cooking utensils and cooking device

A technology of non-stick coatings and pots, which is applied in coatings, metal material coating processes, kitchen utensils, etc., and can solve problems such as coating life and application limitations, coating peeling, failure, and low coating adhesion , to achieve the effect of small porosity, improved hydrophobicity and non-stickiness, and dense coating

Pending Publication Date: 2019-01-04
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] The existing non-stick coatings are mainly Teflon PTFE non-stick coatings or ceramic non-stick coatings. These coatings are usually formed by air pressure spraying, electrostatic spraying, and then high temperature sintering and curing. , and the service life of this kind of coating is generally only half a year to one year, and the coating hardness is low (the Vickers hardness of PTFE non-stick coating is 100-200HV, the Vickers hardness of ceramic non-stick coating is 200-350HV), The coating adhesion is small (the bonding force of PTFE non-stick coating is 2-10MPa, the bonding force of ceramic non-stick coating is 2-5MPa), the coating thickness is small (the thickness of PTFE non-stick coating is 20-50μm , the thickness of the ceramic non-stick coating is 20-40μm), the acid and alkali resistance and salt resistance are also average. During long-term use, scratches, wear and corrosion will inevitably cause the coating to fall off and fail. When the surface is coated with After the layer fails, this non-stick coating will not be non-stick, which limits the life and application of the coating to a large extent

Method used

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  • Non-stick coating and preparation method thereof as well as cooking utensils and cooking device
  • Non-stick coating and preparation method thereof as well as cooking utensils and cooking device
  • Non-stick coating and preparation method thereof as well as cooking utensils and cooking device

Examples

Experimental program
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Effect test

preparation example Construction

[0074] Modified PFA powder A1, the preparation method includes: (1) 47.6kg common PFA powder, 0.4kg polyvinyl alcohol (purchased from Shanghai Fusichun Chemical Technology Co., Ltd., the model is PVA1788), 2kg glycerin and 50kg water are mixed to prepare slurry (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 air outlet temperature is 100°C to obtain modified PFA powder A1. The particle size D50 of the modified PFA powder A1 is 52 μm, the fluidity is 15 s / 50 g, the purity is 99.9%, the melting point is 410° C., and the surface roughness is Ra0.2 μm.

[0075] Modified PFA powder A2, the preparation method comprises: (1) 54.8kg common PFA powder, 0.2kg polyvinyl chloride (purchased from Shanghai Ji Ning Industrial Co., Ltd., model is K55-59), 3kg paraffin and 42kg water are mixe...

Embodiment 1

[0077] This example is used to illustrate the method of preparing non-stick coating by plasma spraying method.

[0078] (1) Pretreat the aluminum pan base (thickness 2.5mm), wherein the pretreatment method includes: a) degreasing at 55°C for 8 minutes; b) cleaning with deionized water; c) drying at 100°C 5min; d) Use 60-80 mesh brown steel grit to sandblast the inner surface of the aluminum pot base under the air jet pressure of 0.6MPa to make the surface roughness Ra3μm, and then use the air flow (air) to seal the inner surface of the pot base Blow off the powder particles remaining on the surface; e) wash with 40% by weight of NaOH solution at 80°C for 1 minute; f) neutralize with 20% by weight of nitric acid solution for 3 minutes; g) after cleaning with deionized water, 300 Dry at ℃ for 12 minutes;

[0079] (2) Preheating the substrate surface obtained in step (1) to 120°C;

[0080] (3) With alumina powder and modified PFA powder A1 as raw materials, a non-stick coating ...

Embodiment 2

[0083] This example is used to illustrate the method of preparing non-stick coating by plasma spraying method.

[0084] (1) with reference to the method in embodiment 1, aluminum pan substrate (thickness is 2.5mm) is carried out pretreatment;

[0085] (2) Preheating the substrate surface obtained in step (1) to 100°C;

[0086] (3) With titanium oxide powder and modified PFA powder A2 as raw materials, a non-stick coating is formed on the substrate surface through plasma spraying treatment; wherein, the conditions of plasma spraying treatment include: the spraying power of the plasma spray gun is 35kW, and the spraying current is 580A, the flow rate of argon gas in the working gas is 40L / min, and the flow rate of hydrogen gas is 3L / min; the spraying distance between the plasma spray gun and the substrate is 110mm, the spraying angle is 80°±1°, and the moving speed of the spray gun is 85mm / s; In the formed flame flow, titanium oxide powder is fed into the distance from the spra...

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Abstract

The invention relates to the technical field of electric heating appliances, and discloses a non-stick coating and a preparation method thereof as well as a cooking utensil and a cooking device. The method includes the following steps: (1) a substrate is pre-treated; (2) the substrate surface obtained by step (1) can be pre-heat-treated optionally; (3) a ceramic powder and a fluorine-containing resin powder are used as raw materials, a composite coating is formed on the surface of the substrate by plasma spraying treatment; (4) the composite coating formed on the surface of the substrate is subject to heat treatment to obtain a non-stick coating; wherein the temperature of the heat treatment is about 0-50 DEG C higher than the melting point of the fluorine-containing resin. The non-stick coating of the invention has the advantages of being hydrophobic and non-sticky.

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] The existing non-stick coatings are mainly Teflon PTFE non-stick coatings or ceramic non-stick coatings. These coatings are usually formed by air pressure spraying, electrostatic spraying, and then high temperature sintering and curing. , and the service life of this kind of coating is generally only half a year to one year, and the coating hardness is low (the Vickers hardness of PTFE non-stick coating is 100-200HV, the Vickers hardness of ceramic non-stick coating is 200-350HV), The coating adhesion is small (the bonding force of PTFE non-stick coating is 2-10MPa, the bonding force of ceramic non-stick coating is 2-5MPa), the coating thickness is small (the thickness of PTFE non-stick coating is 20-50μm , the thickness of the ceramic non-stick coatin...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/04A47J36/04
CPCA47J36/025A47J36/04C23C4/04C23C4/134
Inventor 李兴航曹达华黄宇华杨玲李洪伟李康屈雪平
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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