A kind of high wear-resistant non-stick coating specially used for cookware and preparation method thereof

Abstract

The invention relates to the field of coatings, and discloses a high wear-resistant and non-stick coating specially used for cooking utensils, including a surface coating and a non-surface coating; the surface coating and the non-surface coating include: polytetrafluoroethylene emulsion, bonding resin , Wear-resistant resins, pigments, fillers, additives. Among them, in the surface coating, the unevenness coefficient of the particle size of the pigment and the filler is Cu>5; in the non-surface coating, the particle size of the pigment and the filler adopts discontinuous gradation, the unevenness coefficient Cu>5, and the curvature coefficient Cc=1‑3; where Cu=d 60 / d 10 , Cc=d 30 2 / d 60 *d 10 ; The particle size of the pigment and filler in the top coat is smaller than that in the non-top coat; the filler is insoluble in the paint and can be uniformly dispersed. The wear-resistant and non-stick coating of the present invention not only has excellent non-stick properties, but also has good wear resistance, can effectively resist scraping by a spatula, and has a long service life.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high wear-resistant and non-stick coating specially used for cookware and a preparation method thereof. Background technique [0002] In the non-stick cookware industry, the poor wear resistance of non-stick coatings seriously affects the performance and service life of cookware. Pure polytetrafluoroethylene (PTFE) has low strength, flexible and stretchable mechanical properties, so that when the coating encounters the impact of cooking with a spatula or cleaning and wiping with hard fiber cloth, it is very easy to produce irreversible and detectable wear, so that it does not stick. The pot loses its use value in a short period of time and is scrapped ahead of schedule. In order to improve the service life of the PTFE coating, organic resins are often used to modify it. For example, the patent CN101717601A discloses a non-stick coating made of polytetrafluoroethylene as a film-forming ...

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Problems solved by technology

[0002] In the non-stick cookware industry, the poor wear resistance of non-stick coatings seriously affects the performance and service life of cookware

Pure polytetrafluoroethylene (PTFE) has low strength, flexible and stretchable mechanical properties, so that when the coating encounters the impact of cooking with a spatula or cleaning and wiping with hard fiber cloth, it is very easy to produce irreversible and detectable wear, so that it does not stick. The pot loses its use value in a short period of time and is scrapped ahead of schedule

In order to improve the service life of the PTFE coating, organic resins are often used to modify it. For example, the patent CN101717601A discloses a non-stick coating made of polytetrafluoroethylene as a film-forming substance. It is mainly composed of polytetrafluoroethylene, solvent gasoline, Composed of alkyd resin, surfactant, and wear-resistant filler, but it can't get very good wear-resistant effect

The PTFE coating still has the disadvantages of poor wear resistance and easy scratches

Patent CN 102643582A discloses a non-stick coating containing main film-forming fluororesin, acrylic emulsion and water, with or without additives. Although its surface has no pinholes and no yellowing defects, it also has insufficient wear resistance The problem

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