In order to expand the application range of paper cups, in 1940, double wall paper cups were introduced to the market. This kind of paper cup is not only easy to carry, but also can be used to hold hot drinks. Later, the manufacturer coated latex on these cups to cover the "cardboard smell" of the paper and enhance the leak resistance of the paper cups. Latex-coated single-layer wax cups are widely used in self-service vending machines to hold hot coffee.
Some food companies have begun to coat polyethylene on cardboard to increase the barrier and airtightness of paper packaging. Since the melting point of polyethylene is much higher than that of wax, the new beverage paper cups coated with this material can be ideally used to hold hot drinks, which solves the problem of affecting product quality due to the melting of coating materials. At the same time, the polyethylene coating is smoother than the original wax coating, improving the appearance of the paper cup. In addition, its processing technology is also cheaper and faster than the method of using latex coating.
The quality of disposable paper cups on the market is uneven, and there are great hidden dangers. In order to make the cups look whiter, some paper cup manufacturers have added fluorescent whitening agents. This fluorescent substance can cause cells to mutate, and once it enters the human body, it will become a potential carcinogen. In order to achieve the water-proof effect of paper cups, a layer of polyethylene water-proof film will be coated on the inner wall during production. Polyethylene is the safest chemical substance in food processing. When polyethylene is melted or applied to paper cups, it may be oxidized to carbonyl compounds, and carbonyl compounds are not easy to volatilize at room temperature, but they may volatilize when hot water is poured into paper cups, so people will smell strange.
Although there is no research to confirm what kind of harm the carbonyl compounds released from paper cups will bring to the human body, from a general theoretical analysis, long-term intake of this organic compound must be harmful to the human body. What is even more worrying is that some inferior paper cups use recycled polyethylene, which will undergo cracking changes during reprocessing, produce many harmful compounds, and migrate to water more easily during use. The state explicitly prohibits the use of recycled polyethylene in food packaging, but because recycled polyethylene is cheap, some small factories still use it in violation of regulations to save costs.
Suzhou Accum Packaging Co., Ltd is a China paper packaging manufacturer and takeaway packaging factory, we provide wholesale food and beverage packaging containers at factory price. Welcome to consult, we look forward to creating more value for you!
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