Inferior plastic bags are mainly made of recycled plastics. Because their sources are complex, their contents are unknown, and they contain some pollutants, the recycled products are easy to wash and bring in impurities, so a lot of dark dyes are often added to cover up the color defects. In addition, some solvent additives are used in the plastic film printing process. Such as toluene, ethylbenzene, acetone, etc. Adding solvents such as benzene, toluene, xylene and acetone. It is harmful to paint and ink. If it is not used properly, it can be directly mixed with secondary contaminated food.
Even good quality plastic bags do great harm to the environment. When they are buried, they occupy a very large area of land and are extremely difficult to decompose. It usually takes about 100 years to be basically decomposed by nature. This is self-evident for China, which is now treated by plastic landfill.
Food packed in plastic bags is a health taboo. At present, people use three kinds of plastic bags:
The first one is that it can neither touch the skin nor put food, but can only be used to hold building materials;
The second is used for clothing;
The third can be used to barely hold food.
Most of these three kinds of plastic bags contain "toxins". For example, PVC plastics are toxic varieties. Although its raw materials are non-toxic, toxic plasticizers are added in the process of making plastics. In addition, stabilizers are added to some plastic products, and these stabilizers are mainly lead stearate, which is also toxic, and this lead salt is easy to precipitate, which will cause cumulative lead poisoning once it enters the human body. Most plastic bags used in the market now are not allowed to hold food. Fish stalls often use particularly dark plastic bags, such as black, red and dark blue. Most of these dark plastic bags are recycled waste plastic products, which are harmful to human health and cannot be used to hold imported food. Moreover, the ultra-thin plastic bags commonly used in food stalls are also forbidden to hold food. In addition, don't use PVC plastic products to store alcoholic food and oily food, otherwise the lead in the bag will dissolve into the food, and don't put the food with a temperature higher than 50 degrees Celsius. Vegetables are put in plastic bags, and poisonous gas released by plastic bags will run into vegetables. Therefore, it is best to buy food with a cloth bag or a vegetable basket. Don't use plastic barrels of cooking oil. Plastic is a kind of polymer compound, which is polymerized from many monomers. A certain amount of plasticizer, stabilizer and pigment are added in the manufacturing process. According to analysis, many plastic monomers, plasticizers, stabilizers and pigments are harmful to human health.