Preparation method of cookware surface temperature change indicating coating

Abstract

The invention provides a preparation method of a temperature-change indicating coating for the surface of a cooker. The preparation method comprises the following steps: spraying a ceramic coating onthe surface of the cooker; coating the surface of the ceramic coating with a thermochromic ceramic coating to form a thermosensitive coating; spraying a transparent ceramic coating on the surface of the thermosensitive coating, and curing to obtain the temperature-change indicating coating. The preparation method disclosed by the invention has the beneficial effects that firstly, the temperature of the cooker can be more accurately judged according to color change of the thermochromic coating on the upper surface of a handle, and the problems of rapid decreasing of ceramic coating inadhesion,food nutrition loss, structural changes and the like caused by high cooking temperature are solved; and secondly, another layer of transparent ceramic coating is sprayed on the surface of the thermochromic coating, so that the contact between the thermochromic coating and food is completely avoided and the observation for discoloration of the thermosensitive coating is not affected.

Description

technical field [0001] The invention relates to a preparation method of a temperature-change indicating coating on the surface of cookware, and belongs to the technical field of temperature-change coatings. Background technique [0002] Along with people's pursuit of quality of life, cooking utensils are paid more and more attention to as daily necessities. Whether it is the choice of cookware materials and coatings or the temperature of cooking dishes, there is a lot of knowledge. [0003] First of all, ceramic coating has become a popular healthy cookware coating in the world because of its safety, environmental protection and high temperature resistance. The non-stick durability of the ceramic coating will directly affect the service life of the cookware. Once the non-stick property is lost, it will be extremely difficult to clean the cookware. However, high temperature (over 250° C.) is the main reason for the decline of the non-stickiness of ceramic coatings. How to a...

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Problems solved by technology

However, since the temperature-sensitive color-changing pigment is prepared from an electron-transfer organic compound system, the high temperature resistance is not good, and it can withstand 230°C in a short time (10 minutes). When the temperature is higher than 80°C, the organic matter that constitutes the color-changing system begins to degrade. , not only lose the color-changing effect, but also release toxic substances. According to national regulations, temperature-changing pigments should avoid direct contact with food and water

[0007] CN201020506013.3 discloses a pot with a temperature-sensitive color-changing part. A screw is provided on the metal connecting part between the pot body and the handle. The biggest advantage of the patent is that it is convenient to replace the heat-sensitive color-changing element, which reduces the chance of direct contact between the color-changing paint and food, but it is not suitable for pots that do not use screw die-casting on the handle surface, and it is impossible to completely avoid the contact between the color-changing paint and food Chance

[0008] CN201520707609.2 discloses a pot with a temperature-sensitive color-changing coating surrounding the handle. This patent can be applied to pots integrally formed by die-casting, but it still cannot completely avoid the chance of the color-changing coating coming into contact with food.

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