not good. A paper cup is a kind of paper container made by machining and bonding the base paper (white cardboard) made of chemical wood pulp, and its appearance is cup-shaped. Paper cups for frozen food are waxed, which can hold ice cream, jam and butter. The paper cups used for heating drinks are coated with plastic, which can withstand temperatures above 91℃ and can even hold boiling water. Paper cups are characterized by safety, hygiene, lightness and convenience. It can be used in public places, restaurants and restaurants, and it is a disposable product.
In order to achieve water-proof effect in the production of paper cups, a polyethylene water-proof film is coated on the inner wall. Polyethylene is a relatively safe chemical substance in food processing, which is difficult to dissolve in water, non-toxic and tasteless. Carbonyl compounds are not volatile at room temperature, but they may volatilize when hot water is poured into paper cups, so people will smell strange smell. Long-term intake of this organic compound is harmful to health and even carcinogenic.
in the national standard of paper cup quality, only microorganisms need to be detected, but chemicals have not been detected, because this kind of detection is very complicated and difficult. Because of the poor quality of paper pulp, some paper cups add a lot of fluorescent bleach to make the products white, which is carcinogenic. She suggested that disposable paper cups should not be used for many purposes. If used, it is best to fill them with cold water to reduce the volatilization of harmful chemicals.
How to choose
1. Look: When choosing disposable paper cups, don't just look at whether the color of the paper cups is white or not, and don't think that the whiter the color, the more hygienic it is. Some paper cup manufacturers add a lot of fluorescent brighteners to make the cups look whiter. Once these harmful substances enter the human body, they will become potential carcinogenic factors. Experts suggest that when choosing paper cups, citizens should take a photo under the lamp. If the paper cups are blue under fluorescent light, it proves that the fluorescent agent exceeds the standard and consumers should use it with caution.
2. pinch: the cup body is soft and not firm, so be careful of water leakage. In addition, it is necessary to choose paper cups with thick and stiff walls. Paper cups with low cup hardness are very soft to pinch. After pouring water or drinks, they will be seriously deformed when they are lifted up, and even they will not be lifted up, which will affect their use. Experts pointed out that generally high-quality paper cups can hold water for 72 hours without leakage, while poor quality will seep in half an hour.
3. Smell: The color of the cup wall is fancy, so be careful of ink poisoning. Quality supervision experts pointed out that paper cups are mostly stacked together. If they are wet or polluted, mold will inevitably form, so paper cups that are wet must not be used. In addition, some paper cups will be printed with colorful patterns and words. When the paper cups are stacked together, the ink outside the paper cups will inevitably affect the inner layer of the paper cups wrapped outside, and the ink contains benzene and toluene, which is harmful to health. Buy paper cups with no ink printing or less printing on the outer layer.
4. Use: distinguish between a cold cup and a hot cup, which "have their own functions". Experts finally pointed out that the disposable paper cups we usually use can generally be divided into two types: cold drink cups and hot drink cups, which have their own functions. Once they are "misplaced", they may have an impact on consumers' health.