China has a special standard for the production technology of porcelain-like tableware, which requires that melamine powder (melamine formaldehyde resin) be used as the base material and cellulose be used as the base material. Moreover, the porcelain-like tableware made according to the technical standards stipulated by the state has good resistance to high temperature and humidity, solvent and alkali, and there are many inferior porcelain-like tableware made of urea-formaldehyde resin instead of melamine-formaldehyde resin in the market.
And the raw material for making porcelain-like tableware must be A8 or A5. A8 is mainly made of natural mineral powder, which is green and harmless to human body. Moreover, A5 is 100% melamine resin, which is non-toxic, odorless, good in temperature resistance and very safe to use.
Precautions:
China has special standards for the manufacturing technology of porcelain-like tableware, which stipulates that melamine powder (melamine formaldehyde resin) must be used as the base material and cellulose A as the base material. Porcelain-like tableware made according to national technical standards has good resistance to high temperature and humidity, solvent and alkali, but there are many inferior porcelain-like tableware made of urea-formaldehyde resin instead of melamine-formaldehyde resin in the market.
Urea-formaldehyde resin is formed by condensation polymerization of urea and formaldehyde solution under the catalysis of alkali or acid, which releases formaldehyde gas after water interpretation. The more water, the stronger the acidity, the higher the temperature, the more serious the hydrolysis, and the more formaldehyde gas is released. Therefore, tableware made of urea-formaldehyde resin is harmful to human body.
Baidu encyclopedia-imitation porcelain bowl