It is certainly in line with the national Melamine Dinnerware standard tableware, you can rest assured that melamine and formaldehyde reaction to produce melamine material, the reaction irreversible reaction, will not once again restore melamine or formaldehyde, but in this reaction, formaldehyde is excessive (Reaction conditions required), resulting in the reaction after the end of a small amount of free formaldehyde in the material, but in the follow-up process of processing some free formaldehyde will release a part, there are still part of the existence of products, the test qualified (free Formaldehyde migration less than 15 ㎎ / ㎏, the EU standard), you can as a commodity, into our table.
Xinhua News Agency, the American Medical Association, “Medical Medicine” magazine recently published a research report that melamine as a raw material for the production of tableware in the high temperature process, will release the chemical substances, with the diet into the human body.
The researchers selected two groups of healthy adult men and women as the object of study, respectively, so that they use melamine bowl and ceramic bowl food consumption. Within 12 hours of eating, the researchers tested their urine samples.
The results showed that the use of Melamine Dinnerware group of subjects, the average melamine content of urine is another group of 6.4 times.
The study did not assess the impact of melamine on human health, from the cutlery in the melamine is a long-term harm to human health can not be confirmed. Experts pointed out that infant kidney function is still weak, so long-term low-dose intake of melamine easily damage their renal function.
Melamine is an organic compound, widely used in coatings, plastics, pharmaceuticals, textiles and other fields. As the product cold and heat resistance is good, anti-drop durable, not easy to fade, melamine as the main raw material of imitation porcelain tableware.
Researchers said the medical community on melamine may lead to long-term biological effects need to continue research.
Melamine formaldehyde resin itself is non-toxic, but the melamine formaldehyde resin contains a certain amount of free formaldehyde, in the microwave radiation will be slow to release, so for safety, the use of melamine resin made of utensils will be marked “can not be put into the microwave” The goodwill warning. But unfortunately: According to the spot checks, the market price of 13,000 to 14,000 yuan / ton of melamine resin material for the production of poor quality porcelain tableware less than 20%. With the price of 5,000 yuan / ton of urea-formaldehyde resin instead, almost illegal production of porcelain tableware industry tacit “hidden rules.”
Urea-fOrmaldehyde resin (UF)
Urea vinegar resin (ie urea formaldehyde resin) is urea and formaldehyde by adding polymerization reaction of the thermosetting resin. The structure of the product is relatively complex, directly by the amount of urea and formaldehyde, the reaction system pH, reaction temperature, time and other conditions. The urea-formaldehyde resin, which is synthesized by traditional theory, is mainly divided into two stages. The first stage is the formation of methylol urea, which is the addition reaction stage. The second stage resin is the polycondensation reaction stage.
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Post time: Jun-02-2017