Extended data:
Plastic packaging bag is a kind of plastic material, which is widely used in daily life and industrial production. However, this temporary convenience has brought long-term harm and is called "white pollution". Commonly used plastic packaging bags are mostly polyethylene films, which are non-toxic and can be used to hold food. There is also a membrane made of PVC, which is not toxic in itself, but the additives added according to the purpose of the membrane are often harmful to the human body and have certain toxicity.
Be careful with plastic bags.
There are strict laws and regulations on plastic packaging bags for food packaging abroad, which stipulate that ordinary plastic packaging bags for food cannot be used to hold food above 50 degrees Celsius. Food packaging must be marked with the highest temperature that can be reached. There is no such regulation in China, which leads to some unqualified plastic packaging bags that are very harmful to health.
First, at lunch time, pedestrians who pack food in portable plastic bags are often seen. Most of these plastic packaging bags have no QS certification, and a considerable part of them are made of recycled plastics such as medical waste. Dyes may be added in the production process, some contain organic dyes, and many also contain aromatic hydrocarbons.
Second, some are for hygiene to avoid the spread of bacteria, but if unqualified plastic bags are decomposed by heat, the harm will be even greater. This method is actually not feasible. The most hygienic and safe way is to disinfect tableware or bring your own tableware.
Just look at the information: Baidu Encyclopedia-Plastic Packaging Bag