Coated aluminum pan is the most basic kitchen utensils, with the characteristics of light weight and low production cost. In addition, compared with the expensive cast iron or stainless steel pan, the aluminum pan uses less oil. When it is used to make fish, omelets and pancakes, the fat content is much lower, which also meets the needs of modern consumers who pay attention to healthy diet.
But for a long time, aluminum pan has a fatal weakness: poor heat resistance. That's why picky chefs are more likely to choose other metal pans when making high-temperature dishes such as fried steak.
However, in this respect, the aluminum pan is also constantly improving: the inner surface is usually coated with polytetrafluoroethylene, which is known as Teflon, and the outer surface is coated with silicone polyester resin.
The aluminum pan coated with silicone polyester resin can withstand cooking temperature of 250 ° C for a long time and even 300 ° C for a short time.
In contrast, the heat resistance of traditional surface coating resin based on pure organic polymer is not very high, but if the silicone modified polyester resin is used, the heat resistance of the coating will be significantly enhanced.
During the baking process, after the moisture in the coating evaporates, the coating can be heated continuously at the temperature of 250 ° C to 280 ° C for about 10-15 minutes to complete the cross-linking reaction. Silicone resin is used as base material to wrap the solid particles .
Silicone coatings without organic components have better heat resistance: if pigments and fillers are added, these coatings can even withstand high temperature above 650 ° C for a short time. If the silicone resin without organic modification is used, the heat resistance of the coating will be incomparable. This kind of coating can be used for engine parts. However, the use environment of cooking utensils and other household products is far less harsh than that of the engine, so there is no need to use pure silicone resin at all, and the cost of pure silicone resin is also higher, so it will not become the preferred base material for kitchenware coatings. Silicone resin can not only maintain excellent substrate adhesion, but also help to adjust the coating performance to meet the needs of specific applications as much as possible, while ensuring high cost performance.