The paper cup (PE) is covered with a layer of plastic film (PE) on the inner wall of the paper cup, which is very smooth and can play the role of waterproof and oil proof. PE is polyethylene, which is the safest chemical in food processing, which is what we often call plastic.
The material is odorless, non-toxic, feels like wax, and absorbs less water, so it is often used as a waterproof material. Its melting point is between 120°-140°, while the boiling point of water is 100°, so it is insoluble in water and safer to use.
At present, most of the disposable paper cups on the market are single-layer coated (PE) paper cups, that is to say, only the inner wall of the paper cup has a coating, but the outer wall does not.
Therefore, it is not recommended to hold cold drinks, because when holding cold drinks, it is easy to form condensed water on the outer wall of the cup, and the condensed water can easily soften the cup body and be in a downward state, and the paper cup is easily deformed and causes water splashing.
The realization of waxed paper cups on the market has been reduced a lot. Most of what we see are coated (PE) paper cups. If you want to drink hot, buy single-layer coated paper cups. If you want to drink cold drinks, it is best to buy double-layered paper cups. Laminate (wallpaper of outer wall).
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