However, according to industry sources, at present, many paper cup factories use illegal recycled paper. In order to reduce costs, paper mills recycle waste newspapers, waste paper boxes and books at low prices, mix them into pulp, then add a lot of fluorescent bleach to make their colors white, and also add some industrial calcium carbonate and talcum powder to increase the weight of paper. Most merchants only value the huge profits behind this product, but there is no doubt that this paper cup is harmful to people's health.

Do disposable paper cups have a shelf life?

1. Disposable paper cups also have a shelf life. At present, the quality of disposable paper cups on the market is uneven, which has great hidden dangers. Moreover, improper storage in most families makes the cups damp and moldy, which leads to the growth of bacteria and fungi. If used at this time, it will cause certain harm to human body and easily cause respiratory diseases. Buying disposable paper cups must depend on the production date and shelf life.

2. Some paper cup manufacturers will add fluorescent whitening agents to make the cups look whiter. This fluorescent substance can mutate cells and once it enters the human body, it will become a potential carcinogen. In order to make the paper cup waterproof, a polyethylene waterproof film is coated on the inner wall during production. Polyethylene is the safest chemical in food processing. However, if the selected materials are not good or the processing technology is not enough, polyethylene may be oxidized into carbonyl compounds during hot melting or coating on paper cups. Carbonyl compounds do not volatilize at room temperature, but hot water poured into paper cups may volatilize, so people will smell a strange smell. Long-term intake is harmful to human body.

3. When drinking water, it is best to choose household cups and use less disposable paper cups. You can also bring your own portable kettle when you go out to play, which is convenient to drink and environmentally friendly.

There are several common disposable paper cups.

The first one is made of white cardboard, which is mainly used to hold dry food such as French fries and popcorn, but it can't hold water;

The second is a wax paper cup, which is waterproof and thick, but can't hold food with a temperature exceeding 40℃;

The third is the so-called "paper-plastic cup", that is, the outer bread is covered with a layer of paper, and the inner wall is coated with a smooth coated paper, which is waterproof and oil-proof. The third type of cup is the most widely used and has the largest number of manufacturers.