At present, not all disposable lunch boxes on the market meet the national standards. Long-term use of unqualified lunch boxes will have adverse effects on the health, and self-provided lunch boxes are the first choice.

Foamed plastic lunch boxes are still widely used

In May p>2111, Order No.131 "Notice on Stopping the Use of Disposable Foamed Lunch Boxes in Catering Industry" was issued, and this white pollution source finally faced the ban. But in fact, foamed lunch boxes are still common in the catering market, and some small vendors are greedy for their low prices and still sell or use them after purchase. The reporter interviewed Xiao Liu, a student at school. She said that she usually buys lunch boxes, fried noodles and fried rice on the street at noon, and most of them use foamed lunch boxes. Although she knows that the foamed lunch boxes are not good, she will not decide whether to buy them because of the problems of the lunch boxes. It can be seen that the foamed lunch box can not be called the old times. Associate Professor Guo Yuhua said that disposable foamed plastic lunch boxes are also called disposable foamed polystyrene snack boxes. Among them, the harmful hidden dangers of raw materials such as polystyrene, foaming agent and photosensitizer used to degrade foamed plastic snack boxes to human body should not be underestimated. When polystyrene is used as raw material, the free monomer styrene in its products will be harmful to the central nervous system, kidney and liver if it is released by heating and enters the human body with food, and even cause cancer, so if it is used for a long time, it will increase the risk of illness.

Degradable lunch boxes may not all be qualified

Then the lunch boxes marked "Degradable" must be degradable? Is it hygienic and safe? In fact, the reporter learned from many sources that there are many types of degradable lunch boxes on the market, and the prices are not small, from 8 cents to 31 cents each, which is two or three times as much. When asked about the merchants, they all said that the lunch boxes looked similar, and they were all marked with the word "degradable". They didn't know the difference. Associate Professor Guo Yuhua analyzed that the price difference is so much that it is probably the problem of raw materials. In the process of making degradable lunch boxes, it is necessary to add additives, such as molding agent, water-resistant agent, sizing agent and so on. The standard lunch box should choose chemical additives that are non-toxic and have no side effects. If some industrial reagents are added, it can achieve the same effect and reduce the cost, but it will pose a certain threat to human health. Some businesses are more likely to ignore the national regulations and shoddy products, adding a lot of industrial-grade calcium carbonate, paraffin wax and other substances in the production process, and even adding waste plastics from irregular sources. If they are used for a long time, they will easily form indigestion, gallstones and kidney calculi, which will seriously lead to heavy metal poisoning, nervous system disorder, harm the human hematopoietic system and induce organ cancer.

quality of lunch boxes with naked eyes

- color Most people think that white lunch boxes are clean and hygienic, but degradable lunch boxes are not. Generally, degradable lunch boxes use paper or plants as raw materials, but their colors are not white, and the paper we use every day has also been bleached. Lunch boxes made of starch will be gray, and other lunch boxes will be slightly darker in color, which is not pure white. Some qualified lunch boxes may also add edible additives in the post-production process to enhance their aesthetics.

- Smell Some inferior lunch boxes will have a certain pungent smell, which is due to the addition of some harmful chemical reagents or industrial additives during the processing.

- A qualified lunch box will have a certain degree of "toughness", which will not be very brittle and will be broken when poked, and should have high strength.

Experts remind

1. Usually, disposable lunch boxes should be used sparingly and carefully, and it is better to bring your own lunch boxes, which is hygienic and economical.

2. Don't use disposable lunch boxes for microwave heating, which will cause some additives in the lunch boxes to enter the food, pollute the food and do harm to human health.

3. The foamed plastic lunch boxes used by vendors should be rejected.

use it as little as possible.