Toxic and carcinogenic.

The common packing boxes on the market are mainly made of PET, PP and PS.

Which PP plastic is more heat-resistant, can withstand high temperatures of about 200 degrees Celsius, therefore, can be heated with a microwave oven, repeated heating will not be a big problem.

While PET, PS and other plastics are relatively poor heat resistance, PET at high temperatures will release carcinogenic substances, in addition, PS containing benzene ring, containing bisphenol A PC, these plastics are non-toxic, but in the heated to a certain temperature will be degraded, resulting in the production of toxic small molecules.

Therefore, it is best not to directly heat the packing boxes made of these two materials, and not to fill them with food that is too hot, and, of course, not to use them over and over again.

Extended information

Harm

Disposable lunch box hidden dangers

From the beginning of the foam type to biodegradable type, disposable foam lunch box widely used unabated. Commuters, students are the use of disposable lunch boxes of the main crowd, the reporter learned that most people know that disposable lunch boxes whether from the point of view of health or environmental protection are controversial, but it is coveted for its convenience, will always be used.

The disposable lunch boxes on the market today are not all in line with national standards, long-term use of substandard lunch boxes will have a negative impact on the body, the lunch box is the first choice.

Lunch boxes are widely used

In May 2001, Order No. 130 was issued "on the catering industry to stop using disposable foam lunch boxes notice", this source of white pollution is finally faced with being blocked. But the fact is that foamed lunch boxes are still commonplace in the catering market, and some small traders, greedy for their low prices, still sell or buy them for use.

The reporter interviewed a school student, Liu, she said that usually at noon more than in the street to buy boxed lunches, fried noodles, fried rice type of food, most of the use of foaming lunch boxes, although they know that foaming lunch boxes are not good, but will not be due to the problem of the lunch box to decide to buy or not. Visible, foam lunch box can not be called the old days.

Associate Professor Guo Yuhua said, disposable foam plastic lunch box is also known as disposable foam polystyrene fast food box. Which uses polystyrene as raw material, its products in the free monomer styrene if heat release with food into the human body, the central nervous system, kidneys, liver have certain hazards, and even carcinogenic, so if the long-term use of the disease will increase the risk of disease.

Baidu Encyclopedia - Disposable Lunch Boxes