Seven categories of plastic, how much do you know?

"01" stands for PET (polyethylene terephthalate), which is most commonly used in bottled beverages such as mineral water and carbonated beverages. PET is often used to make beverage bottles and sub-bottles, usually the highest heat resistance of 65 ° C, cold resistance to -20 ° C, only suitable for warm or frozen drinks, high temperature liquid, or heating is easy to deform, there are harmful substances melt out. It is well known that beverage bottles made of this material can not be filled with hot water, only suitable for warm or frozen drinks, loaded with high temperature liquid or heating is easy to deform, dissolve harmful substances to the human body. Scientists also found that after the use of this plastic product for more than 10 months, it may release carcinogens. Therefore, it is recommended to throw away the drink bottle after drinking, and do not use it as a water cup or storage container. So as not to cause harm to health, the gain is not worth the loss.

"02" stands for HDPE (high density polyethylene), which is used in plastic containers for cleaning supplies, bath products or plastic bags commonly used in shopping malls. There are also some industrial supplies that can withstand high temperatures of 110 ° C, and can be used to contain food if marked for food. Plastic containers containing cleaning supplies and bath products can be reused after careful cleaning, but often leave residue because it is not easy to clean, thus becoming a hotbed of bacteria. Unlike other beverage bottles, the 4L Nongfu Spring is marked 02 on the bottom. Although it looks much stronger than the general mineral water bottle, it is not recommended to be used as a water utensil, and the possibility of long-term use of harmful substances is very high. The material itself is also difficult to clean thoroughly, and it is recommended not to recycle.

"03" stands for PVC (polyvinyl chloride), which is commonly seen in raincoats and plastic films. Plastic products made of this material are easy to produce two kinds of toxic and harmful substances: one is the single molecule vinyl chloride that is not completely polymerized in the production process, and the other is the harmful substances in the plasticizer. These two substances are easy to precipitate when encountering high temperature and oil, and if they enter the human body accidentally, they are easy to cause cancer. Therefore, it is rarely used in food packaging, if you happen to encounter, do not let it be heated.

"04" is LDPE (low density polyethylene), the raw material of plastic wrap and plastic film, and the heat resistance is not strong. Qualified PE cling film will have a hot melt phenomenon when the temperature exceeds 110 ° C, leaving some plastic preparations that the human body cannot decompose. If it is wrapped in the outside of the food and heated at the same time, the oil in the food is more likely to dissolve the harmful substances in the plastic wrap.

"05" stands for PP (polypropylene), which is the only material that can be heated in the microwave oven, so it becomes the raw material for making microwave lunch boxes. Resistant to 130 ° C high temperature, melting point up to 167 ° C, poor transparency, careful cleaning can be reused.

"06" is PS (polystyrene), which is used to make bowl instant noodles box, foam fast food box material. It can not be used to contain strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene (carcinogens) that are not good for the human body. Although it is heat and cold resistant, it will also release chemicals due to high temperature, so avoid heating the bowl of instant noodles box directly in the microwave oven!

"07" stands for PC and other types of PC, is A widely used material, mostly used in the manufacture of baby bottles, space cups, etc., because it contains toxic bisphenol A and is controversial. In theory, as long as in the process of making PC, bisphenol A is 100 percent converted into A plastic structure, it means that the product is completely free of bisphenol A, let alone release. However, no manufacturer can guarantee that bisphenol A has been completely converted, so attention needs to be paid in the use process.