Many people are used to putting bottled mineral water and bottled drinks in their cars. In case of summer heat. However, there has been a rumor on the Internet that [mineral water in cars will release carcinogens when exposed to the sun]. It is said that bottled water left in cars should not be drunk because plastic bottles will react chemically when heated, producing carcinogens and causing people to suffer from cancer. Can bottled water still be drunk? Is insolation really unsafe? What are plastic bottles? If you are interested in turning over all kinds of plastic containers you usually use, you will find that most of the bottom or side near the bottom have the following icons. These icons mean what? In fact, this is a common plastic classification in the world. Different numbers indicate plastics of different materials. The middle of the figure 1 ~ 7 is the label of different categories. No.1 polyethylene terephthalate (PET): the main character of this article-mineral water, fruit juice and carbonated beverage plastic bottles are made of it. No.2 High Density Polyethylene (HDPE): It is used for common bottled water. No.3 Polyvinyl Chloride (PVC): Plastic used in general plastic pipes; No.5 Polypropylene (PP): This is the most heat-resistant material, which is commonly used in plastic appliances heated by microwave ovens. No.6 Polystyrene (PS): It is now used for cup covers of many milk tea. No.7 often refers to several plastics such as polycarbonate (PC): Most baby bottles use PC as raw material. Myth: Exposure releases plasticizer, The truth of carcinogenicity: Plasticizer is not needed in the process of making drinking water bottles. Plasticizer is also called plasticizer. It is used to add hard plastic, Making it more elastic and durable. Phthalate esters are widely used in plasticizers. It’s a huge family, There are hundreds of compounds. The use of plasticizers is necessary for plastic processing. As long as it meets the regulations of various countries on the amount of plasticizer used, It is allowed to be used in the production of food packaging materials. In addition, PET itself has good fluidity, It is easy to shape in the production process, There is no need to use plasticizer. The safety of plasticizer still depends on how much you eat. And how long it took. It is generally believed that, As long as it meets the national standard of food packaging materials, it will not cause harm to health. However, those illegal products may have problems of abuse or excessive migration. If you are really worried about the danger of plasticizer, Dr. Clove has the following suggestions: 1. Try to buy products sold by regular manufacturers in regular stores. 2. Try not to use plastic products to contain and store foods with high oil content. Plasticizer can be dissolved in fat, If there is plenty of grease, The dissolution of plasticizer may be more. 3. Plastic products should not be heated at high temperatures. Unless otherwise marked [Available for microwave ovens], Or indicate the tolerable temperature. 4. Disposable packaging containers for beverages such as mineral water bottles, There is no need to worry about plasticizer. Myth: The bottle contains bisphenol A, The truth that will make children precocious: Bisphenol A is only needed for hard drinking water containers. It is said that, Plastic bottles for bottled water in the process of making water bottles, In order to make the bottle more transparent and beautiful, Bisphenol A is adde as a transparent agent, When exposed to the sun and heated, bisphenol A will be released. It may cause precocious puberty in infants. Bisphenol A is commonly used in making hard containers such as baby bottles, sports bottles and space cups. The main ingredient of these utensils is the No.7 plastic just mentioned. Disposable mineral water bottles and beverage bottles are made of No.1 plastic PET. Bisphenol A is not needed at all. The acute toxicity of bisphenol A is relatively low, And there is no sign that bisphenol A is genotoxic or carcinogenic. The European Food Safety Authority assessed that, The daily tolerable intake (TDI) of bisphenol A is 0.05 mg per kilogram of body weight. Relevant agencies in the United States have also conducted data review and review. They believe that there is no direct evidence that bisphenol A will cause damage to the health of infants. Therefore, The mineral water and beverage bottles we usually drink do not contain bisphenol A, At present, there is not enough evidence that bisphenol A can cause cancer, There is no need to worry too much. What needs to be worried about is that you may not know if you have noticed other problems. In the hottest days of summer, The highest temperature in the car can reach 70 ~ 80 ℃. However, due to the water in the bottle, The temperature of plastic will not reach 80 ℃, Generally, it will not deform easily, But it may soften. However, High temperatures may indeed cause some substances in PET synthesis to be released into water, Such as antimony. Antimony is a heavy metal used to make PET. Due to problems in production process, As that PET bottle store water, The antimony contained in it can migrate to water. However, Research shows that, The antimony content of PET bottled beverages is very low (far below the WHO guideline for drinking water quality), It does not pose a health risk. In addition, High temperatures may also cause low molecular polymers that may remain in the PET synthesis process to slowly leak into water or beverages. In order to ensure safety, China has introduced a series of standards. These standards try their best to limit the possible existence of small molecular substances in materials to a very low level. Ensure the safety of products. On the whole, as long as it is a standard PET bottle product produced by a regular manufacturer, even in high-temperature cars in summer, there will be no decomposition reaction, and the amount of dissolved substances is very small. You don’t have to worry about the release of plasticizer, bisphenol A or other toxic substances from the bottle when heated.