Can you distinguish the materials of several common plastic packaging?

Food packaging bags are mostly made of plastic, and plastics made of different materials are very different. Specifically, it can be divided into the following categories. No. 1 plastic (PETE): often used for mineral water bottles, carbonated beverage bottles, etc. Transparent plastic bottles made of it are often called“bottle”. This plastic will deform because it is heat-resistant to 70°C, and is only suitable for serving warm or cold drinks. If it is filled with high-temperature liquid or heated, it will be easily deformed and release substances that are harmful to the human body. The study also found that this plastic product will also release carcinogens after 10 months of continuous use, which is extremely harmful to the human body. Throw away the drink bottle when it runs out“recyclable”In the garbage, do not use it as a drinking glass. Avoid heat and cracks; try not to use storage containers to hold other items, so as to cause health problems. No. 2 plastic (HDPE) is often used as cleaning products, bath products, etc. Common white medicine bottles, skin care, and bath product packaging are made of this plastic. If you want to reuse it, you need to clean it thoroughly before using it. Trouble is, these containers are usually not easy to clean, leaving behind the original cleaning supplies, which can easily become a breeding ground for bacteria, so it is better to be careful. It is better not to recycle, and needs to be sorted and recycled. No. 3 plastic (PVC) is often used: raincoats, building materials, etc.; good plasticity and low price; cannot package food. This material is prone to produce harmful substances when exposed to high temperatures, and even releases toxic substances during the manufacturing process. Do not let it get hot when using it. No. 4 plastic (LDPE) is often used as plastic wrap and so on. People are accustomed to putting food covered with plastic wrap into a microwave oven for heating, thinking that the moisture in the food is not easy to lose and the food tastes better. But in fact, even qualified PE cling film will appear hot melt when the temperature exceeds 110℃. Moreover, wrap the food with plastic wrap for heating, and the fat in the food can easily dissolve the harmful substances in the plastic wrap. Therefore, it is a good idea to remove the wrapping plastic wrap before placing food in the microwave. Better not to heat it in the microwave. No. 5 plastic (PP) is often used: special lunch boxes for microwave ovens. This is the only plastic case that can be placed in the microwave and can be reused after a thorough cleaning. It should be noted that, for some microwave lunch boxes, the box body is indeed made of No. 5 PP, but the box cover is made of other grades of plastic. Since the box cover often cannot withstand high temperatures, it cannot be placed with the box body. into the microwave. To be on the safe side, remove the lid before placing the container in the microwave. No. 6 plastic (PS) is often used: bowls of instant noodle boxes, fast food boxes. In case of high temperature, it will release chemical substances that are harmful to the human body; at the same time, it cannot be used to hold acids (such as juice) and alkaline substances, because it will decompose carcinogens. Therefore, you should try to avoid packing hot food in fast food boxes, and do not use the microwave to cook instant noodles in bowls. Out of consideration for oneself and the environment, it is still necessary to take a cautious attitude towards such disposable items. No. 7 plastic (PC), PC is a material that is widely used, especially for the manufacture of baby bottles, space cups, etc. It is controversial because it contains bisphenol A. Experts point out that theoretically, as long as 100% of bisphenol A is converted into a plastic structure in the process of making PC, it means that the product is completely free of bisphenol A, let alone released. However, if a small amount of BPA is not converted into the plastic structure of PC, it may be released into food or drink. Therefore, take extra care when using this plastic container. Residual bisphenol A in PC, the higher the temperature, the more released and the faster the speed. Products of fully qualified quality can be used safely, but defective products cannot be avoided. PC water bottles should not be used to hold hot water. Understanding the different types of plastics can better distinguish the different food packaging bags, and provide certain help for the usual purchase of food and heating food.
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