The melamine tableware will migrate out of the heavy metal of formaldehyde at high temperature.

Melamine tableware, also known as melamine tableware, is lightweight plastic material, heat-resistant and not hot. This kind of tableware is popular among the general public, but once the microwave oven is hot, it may cause heavy metal, formaldehyde and melamine migration. Yesterday, the Provincial Quality Supervision Bureau announced the product testing report of melamine melamine tableware. The pass rate of 100 batches of melamine tableware was 75%. The main problem occurred in the unqualified pollution resistance.

The normal use temperature of melamine tableware ranges from 0 °C to 120 °C. Heating the melamine tableware beyond the use temperature, if placed under hot oil at 200 °C for 10 minutes, will cause the tableware to bubble and decompose, when the melamine tableware starts When foaming, some of the melamine resin will decompose. This process will produce more formaldehyde and melamine. In this case, the tableware should be replaced and the product should be stopped.

Especially worth mentioning is that some chopsticks in hot pot restaurants also use melamine material. Because of the constant contact with the hot bottom of the pot when eating hot pot, and the longer meal time, the quality inspectors found through the test that the melamine tableware After heating at 100 ° C for 3 hours, the migration of melamine in one sample reached the limit specified by national standards. The migration of melamine will further increase with the extension of heating time. After 4 hours at 100 °C, the migration of formaldehyde in multiple samples is greater than the national standard limit.

Some melamine tableware are often exposed to bright colors in the inner layer of food, and printing inks may contain various types of heavy metals. The quality inspectors selected 19 batches of brightly printed patterns on the inner layer and samples with no internal patterns to carry out heavy metal migration comparison tests. From the test results, 14 of the 19 batches with vivid patterns detected heavy metal lead, and the migration amount was significantly higher than that of the samples without bright patterns. Once the heavy metal lead enters the human body, it will not be easily discharged by the human body, and it will have a cumulative effect. When the lead content reaches a certain concentration, it can affect the normal development of children's intelligence.

Consumers are advised to use white and internal unpatterned products when purchasing melamine tableware that holds food directly. At the same time, as the soaking time is prolonged, the amount of lead migration is gradually increased. It is recommended not to use melamine tableware for long-term storage of acidic foods.

In the long-term use of melamine tableware, the surface of melamine tableware will gradually wear, so after the smooth surface wear, will it migrate out of formaldehyde and melamine, causing harm to the human body? From the test results, in the case of repeating 10 times, the values of formaldehyde and melamine migrated from all the samples tested were within the limits of national standards. However, it is worth mentioning that after repeated rubbing with steel balls for 10 times, the amount of formaldehyde migration is about doubled. It is recommended that consumers do not use steel balls to wash the melamine tableware, otherwise the gloss of the surface of the tableware will be destroyed. , leaving a lot of scratches, making the product's formaldehyde and melamine easier to migrate out.

Melamine tableware products are not allowed to enter the microwave oven in the label and product manual. In actual use, it is difficult for consumers to distinguish the difference between melamine tableware and other plastic tableware, and the melamine tableware is mistakenly placed in a microwave oven to heat food. The data shows that after heating in a microwave oven, it is easier to migrate the formaldehyde in the product, so after purchasing the product, the consumer should see the instructions for use and then use the tableware.

The main problem detected by the sampling is that the pollution resistance index is unqualified, soy sauce, vinegar, etc. are easily infiltrated, causing the tableware to be easily contaminated and contaminated. When the product is used repeatedly, the amount of formaldehyde migration is twice as high as that of the conventional one. When the microwave oven is heated, the formaldehyde in a few products exceeds the national standard.

Boiling water can be identified, preferably replaced once every six months

■ Consumption reminder

Due to the high price of melamine-formaldehyde resin, some unscrupulous manufacturers use urea-formaldehyde resin as raw material for the pursuit of profit, and some use urea-formaldehyde molding powder as raw material, and then apply it on the surface of tableware. The first layer of melamine powder, and this product of our country does not allow direct contact with food. When consumers actually purchase, in addition to choosing a regular store, supermarket, do not greet the choice of "selling goods", you can also make their own judgment. Since the decomposition temperature of urea-formaldehyde resin is about 80 °C, and the use temperature of melamine tableware can reach 120 °C, consumers can pour boiling water into the product after purchasing melamine tableware. If a large amount of bubbles are generated, it is a fake dense. Amine tableware products are not recommended.

In actual use, consumers are advised to avoid using melamine tableware to hold high temperature foods, and do not place them in hot iron plates or stockpots. In addition, melamine tableware can not be washed with steel balls. If it is particularly difficult to wash dirt, it is recommended to soak it with detergent and water, then wash it with dish cloth, or wash it directly with a dishwasher. If the melamine tableware is used for a long time, it will cause yellowing and blackening due to stubborn stains such as adsorption pigment, oil stain, coffee stain, etc. It is recommended to replace it in time. The melamine tableware is preferably replaced every six months.

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