For the convenience of hospitality, Miss Wang often buys disposable paper cups from supermarkets. Since the weather has recently turned cold, she used paper cups to fill the guests with hot water. She found that after the paper cup was filled with hot water, it would emit some strange smells. She tried to change several brands of paper cups, but they all had this problem. As a last resort, she had to put some tea in the paper cup to cover up the strange smell. Miss Wang is very worried: Does this unpleasant smell suggest that the material of the paper cup undergoes a chemical change under the action of hot water? Are the chemicals released during this process toxic? She hopes to ask relevant experts for verification.

According to experts in food packaging materials, in order to achieve a water barrier effect during production, paper cups are coated with a polyethylene water barrier film on the inner wall. Polyethylene is the safest chemical substance in food processing. It is difficult to dissolve in water and is non-toxic and tasteless. However, if the selected material is not good or the processing technology is not good enough, the polyethylene may be oxidized to carbonyl compounds during the process of hot melting or applying to the paper cup. Carbonyl compounds are not easy to volatilize at room temperature, but when hot water is poured into a paper cup, they may volatilize, so people will smell strange smells. Although there is no research to confirm what kind of harm the carbonyl compounds released from paper cups will bring to the human body and what malignant diseases it will cause, from a general theoretical analysis, long-term intake of this organic compound must be harmful to the human body. of. What is even more worrying is that some low-quality paper cups use recycled polyethylene, which will undergo cracking changes during the reprocessing process and produce many harmful compounds, which are more likely to migrate into the water during use. The state has banned the use of recycled polyethylene for food packaging, but because recycled polyethylene is cheap, some small factories still use it in violation of regulations in order to save costs. It is understood that in the national standards for the quality of paper cups, only the detection of microorganisms is required, and the detection of chemical substances has not yet been performed, because such detection is very complicated and difficult. Advocate the good habit of bringing your own water cups. The use of disposable cups has only emerged in recent years. Some people even use disposable cups frequently in their offices. This looks very "hygienic", but in fact it is neither environmentally friendly (one time) Sexual plastic cups are difficult to degrade, and disposable paper cups involve the felling of trees), and they are not healthy. In addition to the problems just mentioned, some disposable paper cup manufacturers buy low-priced pulp and add fluorescent bleaching agents in the production process, which may cause cancer. Experts suggest that the disposable cup should not be used as a last resort. If it is used, it is best to pack cold water to reduce the volatilization of harmful chemicals. In the early years, people had the habit of bringing their own water glasses, even when going out for meetings, this is a very good habit. For the sake of environmental protection and health, we should advocate to restore this good habit.

Let say yes to 100% biodegradable plastic !

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