stands for No.1 plastic, general mineral water bottles, with the bottom marked with No.1,

No.1 plastic, with the scientific name of PET polyethylene terephthalate

common mineral water bottles and carbonated beverage bottles. Heat resistance to 71℃ is easy to deform, and substances harmful to human body are melted out, which is a strong carcinogen. The carcinogen DEHP may be released after using the No.1 plastic for 11 months. Can't put it in the car to bask in the sun; Don't pack alcohol, oil and other substances. This kind of plastic is not very safe. I heard that someone just used a mineral water bottle continuously for 18 months and died.

there are other 6 kinds of total plastics, and No.5 is the safest.

No.2: HDPE high-density polyethylene

Common white medicine bottles, cleaning products and bath products. Don't use it as a drinking cup, or as a storage container to hold other items. If the cleaning is not thorough, do not recycle it.

No.3: PVC polyvinyl chloride

Common raincoats, building materials, plastic films, plastic boxes, etc. Excellent plasticity, low price, so it is widely used, and can only resist heat at 81℃. Bad substances are easy to produce at high temperature, and it is rarely used in food packaging. It is difficult to clean and easy to remain, so don't recycle it. Don't buy drinks if they are packed.

No.4: PE polyethylene

Common cling film, plastic film and so on. Harmful substances are produced at high temperature, and toxic substances may cause diseases such as breast cancer and neonatal birth defects after entering the human body with food. Don't put plastic wrap in the microwave.

No.5: PP polypropylene

Common soybean milk bottles, yogurt bottles, juice drinks bottles and microwave lunch boxes. With a melting point as high as 1.67℃, it is the only plastic box that can be put into a microwave oven and can be reused after careful cleaning. It should be noted that some microwave lunch boxes are made of No.5 PP, but the lid is made of No.1 PE. Because PE can't withstand high temperature, it can't be put into the microwave with the box.

No.6: PS polystyrene

Common bowl-filled instant noodle boxes and fast food boxes. Can't put it in the microwave oven to avoid releasing chemicals due to excessive temperature. After being filled with acid (such as orange juice) and alkaline substances, carcinogens will be decomposed. Avoid packing hot food in fast food boxes. Don't cook bowls of instant noodles in the microwave oven.

No.7: other

common kettles, space cups and milk bottles of PC. Department stores often use water cups made of this material as gifts. It is easy to release the toxic substance bisphenol A, which is harmful to human body. Don't heat it when using it, and don't directly bask in the sun.

reference encyclopedia for some materials.