The hottest plastic food bag is convenient and wor

2022-08-15
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Plastic food bags: convenient and worrying

the habit of buying vegetables with wicker baskets and buying breakfast with steel pots and ceramic pots has gradually become history. These non-toxic, tasteless, durable, environmental friendly and hygienic containers commonly used by people in the past have gradually been replaced by colorful, convenient and practical plastic food bags. However, when we put all kinds of food into plastic food bags, we may not realize that some plastic food bags that do not meet health standards or even toxic are becoming killers endangering our health

■ daily life is inseparable from

on the morning of January 2, I learned at the Jiankang Road farmers' market in our city that a vegetable stall uses about 150 plastic food bags a day, and a meat and poultry department uses 200 to 300 plastic bags a day. A saleswoman surnamed Yu in a large supermarket told her that her supermarket uses more than 10000 plastic bags every day, and all kinds of goods are packed in plastic bags, even non-staple foods such as pickles, chili sauce and cooked meat, with the exception of the usual experimental machine, which is difficult to achieve accuracy. A random survey was conducted on 20 citizens. The results showed that each family used more than 15 plastic food bags for breakfast, vegetables, beverages, fruits, snacks and other aspects every day. With other types of plastic packaging bags, about 20 plastic bags entered a family every day. Mr. Zhang, a citizen, said that if there were no plastic bags, what would you use to pack your purchases? Think about it, plastic food bags, who can leave

■ the sanitary condition is worrying

people often see that many people put a plastic bag on the bowl for "hygiene", which seems to play a protective role. In fact, this practice is very unscientific. According to relevant experts, plastic bags have been polluted in the production and sales process. Some unqualified or even toxic plastic bags, once heated, will release harmful gases and dissolve into food, which is very harmful to health. In addition, cooked food packed in plastic bags is often easy to deteriorate. After eating such deteriorated food, people are easy to cause food poisoning symptoms such as vomiting and diarrhea. The medical community found that plastic itself will release harmful gases, so the food in the bag will be polluted to varying degrees, which has a particularly prominent impact on the healthy development of children

plastic bags and disposable lunch boxes known as "white pollution" are a major problem in environmental protection. With an average of five plastic bags per person per day, the city's five million people consume 25million plastic bags per day. We don't know how many of these discarded plastic bags can be recycled, but careful people may have noticed that plastic bags have become the main component of domestic waste, and many discarded colorful plastic bags are floating in the wind on the streets

■ toxic products do great harm

according to the relevant departments, the plastic bags we use now mainly include polyester, polyethylene, polypropylene, polystyrene, polyvinyl chloride and so on. Among them, the plastic bags made of polyethylene and polypropylene are safe and can be used to contain food. Most PVC plastic bags are poisonous and can't package food. Because the unpolymerized vinyl chloride monomer in PVC resin will cause toxicity to human body. Moreover, in the process of processing PVC resin into plastic bags, some toxic auxiliary materials such as plasticizers and pigments should be added. The main component of plastic stabilizer is lead stearate, which is also toxic. Once it enters the human body, it will cause cumulative lead poisoning

according to relevant data, PVC plastic bags are mostly used in the market now. Black, red, blue and other dark plastic bags are mostly reprocessed from recycled waste plastic products, which is very harmful to human body. Ultra thin plastic bags (with a thickness of less than 0.025 mm) are also forbidden to be used for their development laboratory products. If PVC plastic bags are used to contain oily and alcoholic foods and foods whose temperature exceeds 50 ℃, the lead in the bags will dissolve into the food

■ there are ways to identify the advantages and disadvantages

some methods to identify plastic bags are found on the Internet, which can be used for reference by readers

sensory detection method: the non-toxic plastic bag is milky white, translucent or transparent, flexible, lubricated when touching, and the surface seems to have wax; The toxic plastic bag is muddy or light yellow in color, and feels sticky

water detection method: put the plastic bag in the water and press it into the bottom. The non-toxic plastic bag has a small proportion and can surface; Toxic plastic bags are heavy and will sink

shake detection method: hold one end of the plastic bag with your hand and shake hard, which is non-toxic with a crisp sound; The sound is stuffy and poisonous

fire detection method: the non-toxic polyethylene plastic bag is flammable, and the flame is blue. When burning, there is a candle tear like steel plate. How to do mechanical detection? Things drip, have paraffin smell, and smoke less; Toxic PVC plastic bags are nonflammable. They are extinguished immediately after leaving the fire. The flame is yellow and the bottom is green. They can be softened and brushed, giving off an irritating taste of hydrochloric acid

at present, it is an undoubted fact that plastic bags have replaced the previous vegetable baskets with the best resonant frequency and hydraulic natural frequency required by the system. Completely refusing to use plastic bags seems unrealistic and does not necessarily conform to national conditions, but how to standardize production and rational use is a problem worthy of our attention and consideration. It is hoped that the relevant departments will strengthen the management of the production and sale of plastic food bags, so that people can use safe plastic food bags

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