There is a fatal misunderstanding in the plastic b

2022-09-19
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There is a "fatal" misunderstanding in citizens' daily use of plastic bags

wrapping food in plastic bags must prevent personal injury

people realize that plastic bags bring "white pollution" to the environment, but they may not be aware of the misunderstanding of using various plastic bags to package food in life, which is bringing a kind of "pollution" harmful to health into the human body. Recently, an investigation was conducted and authoritative experts were interviewed. It was found that many citizens in Guangzhou "misuse" plastic bags. Myth 1: the steamed stuffed buns and fried dough sticks that have just been baked are put into plastic bags. At the junction of Nanhua East Road and Xiaogang road in Haizhu District, a lively breakfast market will appear every morning. One of the stalls that is now frying fried dough sticks is doing a lot of business. I saw a "chirp", and the golden big fried dough sticks came out of the pot. The waiting customers immediately said, "help me wrap the freshest ones." The stall owner immediately pulled down a white plastic bag as thin as cicada wings and put the fried dough sticks in it. The customer paid and left without noticing that a small hole had been "melted" by the hot fried dough sticks under the plastic bag. Such scenes are common in small shops or stalls selling steamed buns and cakes. A Mr. Cao said, "it will take hundreds of years for plastic bags to degrade. It should be no problem to use them to hold food with a temperature of dozens of degrees." Many other citizens are "optimistic" that: "big bacteria are not afraid of eating small bacteria, but also afraid of this plastic bag." What is the harm of packaging high-temperature food with plastic bags? Zhao Yanwei, the chief senior consultant of Guangdong Packaging Technology Association, was interviewed. According to him, most of the transparent and low-cost film plastic bags widely used in the market at present are PVC (polyvinyl chloride) materials. The temperature of the fried dough sticks just exploded is about 90 ℃, and this kind of PVC plastic bag will melt when exposed to heat at a high temperature of 80 ℃, and the substances released are toxic and harmful. Misunderstanding 2 Pack spicy hot dishes wrapped in plastic bags. There are many shops specializing in "spicy hot" snacks in the night market on South Beijing road. It was observed that the stall owners selling "Malatang" have a habit of putting all the food cooked in boiling water into the dishes wrapped in plastic bags. A stall owner said, "this is a good way to kill two birds with one stone. First, there is no need to wash the dishes. Second, with the isolation of this layer of plastic bags, even if there are bacteria and viruses in the bowl, customers can't eat it." Diners also generally agree with this practice. The survey found that this practice seems to have become an unwritten rule in some snack bars, ranging from those who sell beef brisket powder and ramen to those who sell stinky tofu. Professor Zhao said that "plasticizers" and "stabilizers" will be added in the production of plastic bags, and the molecules of these substances will expand when heated, mostly in circular dispersion, which is toxic and harmful to human body. Scientific research results have shown that modern women are more and more likely to suffer from breast cancer. One of the reasons is that the difference between women is that long coal is too large, and there are more and more "plasticizers" and other ingredients that indirectly enter the stomach, resulting in hormone secretion disorders. Myth 3: use black and other colored plastic bags to pack vegetables and meat. In the meat and vegetable market on the streets of Guangzhou, it is found that many vendors selling meat, vegetables and fruits use plastic bags that are not only transparent and white, but also red, black and even yellow, green, blue and other colors. According to Ms. Tang saizhen, Secretary General of the degradable plastics special committee of the China Plastics Association, it is better not to use colored plastic bags to pack cooked food, snacks and other direct edible foods in plastic bags. There are two reasons: first, the pigments used for plastic bag dyeing have strong permeability and volatility, and are easy to seep out when encountering oil and taking green, low-carbon and environmental protection and safety as important responsibilities; If it is an organic dye, it will also contain aromatic hydrocarbons. Secondly, many colored plastic bags are made of recycled plastics. Because there are many impurities in recycled plastics, manufacturers have to add pigments to cover them up

Professor Zhao Yanwei also stressed: "it is definitely inappropriate to package food with colored plastic bags." Foreign countries have long had clear guidelines on this. For example, in Japan and the United States, it is stipulated that black plastic bags with the most harmful ingredients can only be used for garbage and accessories required by cars, which is the largest in the country; Shandong Tai'an manzhuang town government plans to use 5000 mu of land for the packaging of hardware products. Food must not be packaged. Professor Zhao said helplessly, "in the old days, when people went to the market to buy vegetables and meat, they were wrapped in large leaves and grass and sold by eating small bamboo sticks. From a health point of view, it was better to go back to the past."

plastic bag packaging legislation in developed countries such as Europe and the United States

it is understood that as early as 30 years ago, Western Europe, the United States, Japan and other developed countries have legislated on plastic bag food packaging, including: wrapping cooked food with paper packaging instead of plastic bags; It is forbidden to use colored plastic bags to wrap food, etc. At present, China's environmental protection regulations for plastic bags only focus on the discharge and treatment of plastic bag waste

it is understood that China has some substitute products of high-grade plastic bags with good environmental protection and no toxicity to human body, but they are difficult to be widely used because the price is several times higher than that of ordinary plastic bags. Experts from the Guangdong Provincial Environmental Protection Bureau believe that in addition to legislation, we should also guide citizens' consumption concept: it is actually worthwhile to spend more money on environmental protection products

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