1. Qualified melamine tableware
Qualified melamine tableware is safe to use under normal circumstances.
Due to the above physical and chemical properties of melamine tableware and its price advantage, it is widely used in tableware, daily necessities, etc. Common applications are mainly in baby tableware (fear of breaking), as well as some chain restaurants (price, easy ordering, decals, golden colors form the inherent characteristics of the enterprise), such as Yonghe soy milk, foreign fast food, porridge dishes, etc. in Zhangzhou.
After using melamine tableware for a period of time, due to the erosion of acid, alkali, grease, alcohol and other solvents, physical wear, long-term heating and other influences, the surface of the tableware (that is, the glaze, which is actually the same as the glazing principle of porcelain) is easy to form a melamine tableware. Layer brown speck marks, thus affecting the beauty of the tableware. If you are careful, this will actually happen to our porcelain tableware after a period of use, and it is still safe under normal use. But after all, it is not beautiful, you can consider replacing it.
The so-called normal use of melamine tableware refers to: normal diet, heat resistance of 120, cannot be baked with fire, and contains some highly corrosive items (the common tree alkaloids in life are highly corrosive).
2. Fake melamine tableware
The so-called inferior quality refers to unqualified products produced by melamine powder; the so-called fake refers to the use of urea-formaldehyde resin tableware as melamine tableware. Due to its simple production process and small scale of enterprises, many unqualified melamine tableware (so-called inferior) also entered the market due to reasons such as molds, equipment, and workers.
In fact, the price factor is the main reason why urea-formaldehyde resin tableware pretends to be melamine tableware. The production process and technology of the two are basically the same as above, the difference lies in the raw materials. The main raw material of melamine tableware is melamine powder, which is melamine-formaldehyde resin produced by the reaction of melamine and formaldehyde; the main raw material of urea-formaldehyde resin tableware, commonly known as A1 powder, is urea-formaldehyde resin produced by the reaction of urea and formaldehyde. The core difference between the two is to use melamine or urea to react with formaldehyde. The price and molecular weight of melamine are higher than that of urea, and the synthesized A5 powder is more stable than A1 powder. It's a bit like the difference between glue for home improvement or glue for construction. The quality lies in whether or not melamine is mixed and how much. From the above we can see that due to the difference of raw materials, the molecular structure of real and fake imitation porcelain tableware is different, and then the performance of real and fake imitation porcelain tableware is also very different: the strength is different, 'true' is stronger than 'fake'; The adsorption capacity is different, so 'true' is easier to clean than 'false'; the heat resistance is different, 'true' can withstand 120, and 'false' can only withstand about 80; the color fastness is different, "true" is more difficult to color than "false" , fade legs; different hygiene performance, 'true' can meet the standard of edible tableware, while 'fake' is not edible tableware, can not be used as a container that directly touches food.
The harm of counterfeit melamine tableware lies in its instability, the free formaldehyde exceeds the standard, it may cause cancer in the long term and cause chronic harm to health.
