Put the hottest delicious food into the highly tox

2022-08-04
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In January this year, potato chips from a food factory in Dingxi County, Gansu Province were about to go on sale. However, the factory found a strange taste in the products during quality inspection. The taste is similar to that of home decoration

in order to find out the reason, the manufacturer conducted various experiments, from raw materials to seasonings, but did not find the root of the problem. Finally, a friend who worked in the Chemistry Laboratory of Lanzhou University helped them analyze and found that the strange smell came from the packaging bag of potato chips, but could not analyze the specific substance in the packaging bag

the packaging bag of potato chips is customized from a company named Lanzhou Hongyu Plastic Color Printing Co., Ltd. After receiving the complaint, the inspection team of Lanzhou Municipal Bureau of quality supervision quickly sampled and submitted these products for inspection. After more than seven hours of analysis and testing in the food inspection room of Gansu product quality inspection center, it was finally determined that these strange smells came from the benzene left in the packaging bag

"benzene" - one of the class II carcinogens regulated by the state, as a solvent, mainly used for metal air battery industry development, which still faces many technical bottlenecks. It is used for dilution and drying in paint, building materials, printing and other industries due to the low risk of establishing recycled plastic particle factory. However, for food packaging products, the national standard clearly stipulates that the residual amount of benzene in the product per square meter shall not exceed 3.0 mg, while the measured value of the sample reaches 9.7 mg

followed the quality supervision and inspection personnel to Lanzhou Hongyu Plastic Color Printing Co., Ltd. When the quality supervision personnel took out the inspection report that the residue of benzene in the potato packaging film exceeded the standard by three times, the production supervisor had to admit that they had added benzene solvent in the production of potato packaging film

the production scale and sales volume of Hongyu Color Printing Co., Ltd. also count among peers in Lanzhou. How can benzene residue exceed the standard? The inspectors of the Quality Supervision Bureau are sensitive to the fact that this incident may not be just a case. They decided to organize a special spot check within the city

in the special spot check launched on April 26, the quality supervision and inspection personnel randomly identified seven plastic color printing enterprises producing composite food packaging film, and each enterprise took two samples for inspection. The test results showed that benzene residues in five of the seven samples exceeded the standard, involving the packaging of beef jerky, milk powder, candy, salted bean jerky and potato chips. The most serious one was the milk powder bag produced by Gansu Senjie Packaging Co., Ltd., which exceeded the national standard by more than 10 times. If it was put into production, it would be equivalent to putting the milk powder into a highly toxic bag

with the assistance of Qinghai Provincial Bureau of quality and technical supervision, we finally found the valley dairy factory in Chuankou Town, Minhe County, and found nearly 50000 toxic milk powder bags in the warehouse

how does senger produce? Where does this benzene, which is ten times more than the national standard, come from? In order to further find out the cause, I came to Senjie packaging company. When we asked why there was so much benzene left in the product, the company boss frankly said that it was a process requirement

subsequently, a dozen plastic color printing enterprises with different production scales were investigated in Gansu, Qinghai, Zhejiang and Jiangsu provinces. Through investigation, it is learned that in order to quickly print too thick ink on plastic film, enterprises need to add a mixed solvent to the ink to dilute and promote drying. Toluene, butanone, ethyl acetate and isopropanol are the basic raw materials for mixing solvents. Among the enterprises surveyed, toluene was used as the main raw material for mixing solvents regardless of the scale, but the proportion of addition was different

in the investigation, it is found that the bosses of enterprises have a very clear understanding of the harm of benzene residues, but the methods of controlling benzene residues vary greatly among enterprises. These large-scale enterprises usually use high-speed printing equipment and powerful air supply and exhaust systems to reduce the residue of benzene, but such equipment can only be equipped in millions or even tens of millions. Small enterprises with relatively simple equipment can only reduce the residue of benzene by baking in the high-temperature curing workshop in addition to adding exhaust fans in the workshop

the price of toluene is the lowest among several raw materials that can achieve high-efficiency solvent for spiral spring. That is to say, the higher the proportion of toluene when mixing mixed solvent, The production cost of "load 1 stretching" will be lower.

in the production workshops of these enterprises, it is also found that these food packaging bags are printed on the same production line as the packaging bags of rat poison, chemical fertilizer and washing powder. As far as we know, after entering the food production enterprises, these packaging bags and packaging films generally enter the production line to package food without any treatment.

(according to CCTV) Weekly quality report)

how harmful is excessive benzene?

Tian Ding, member of the expert group of Xuanwu Hospital of Capital Medical University: excessive benzene is certainly harmful to human body. The greatest harm is that it is easy to cause diseases such as cancer, especially blood system diseases, such as hemolytic anemia, granulocytopenia, aplastic anemia and leukemia. Therefore, excessive benzene is even fatal to some people. The patients I contact, such as hemolytic anemia and some leukaemia, have a history of benzene exposure. I suggest that some young (and) sensitive people, such as pregnant women and the elderly, try to reduce their exposure to these harmful substances to ensure their health

benzene solvents can replace

dongjinshi, deputy director of China Packaging Resources Comprehensive Utilization Committee: many environmentally friendly printing solvents have been developed. For example, acetoacetate and butyl acetate, which can replace benzene solvents, can be directly replaced. In addition, the more environmentally friendly water-based solvent water-based coating developed now is to use water as a solvent for printing. Water is not harmful to the environment. In addition, there are some paints such as ultraviolet ink, and soybean oil is used as a solvent for printing, which greatly improves the guarantee of solvent to human health

information source: Life

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