What do the numbers on the bottom of a plastic bottle mean?

What do the numbers on the bottom of a plastic bottle mean?

Triangles on plastic products
Recycling of plastic products
Every plastic container has a number at the bottom (it's a triangle with an arrow, and there's a number in the triangle)
"No.1" pet
Mineral water bottle, carbonated beverage bottle, beverage bottle recycling use: heat resistance to 65 ℃, cold resistance to - 20 ℃, only suitable for warm or frozen drinks, high temperature liquid, or heating is easy to deformation, there are harmful substances to human body melt out. Moreover, scientists found that No. 1 plastic used for 10 months, may release carcinogen DEHP, toxic to testis, Throw away the drink bottle when it's used up. Don't use it as a water cup or a storage container for other things, so as not to cause health problems
"2" HDPE
Cleaning products and bath products are not thoroughly cleaned, so it is recommended not to recycle them: they can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning products and becoming a hotbed of bacteria. You'd better not recycle them
"3" PVC
At present, it is rarely used for food packaging, and it is better not to buy and use: this material is easy to produce harmful substances when it is high temperature, and even it will be released during the manufacturing process. After the toxic substances enter the human body with food, it may cause breast cancer, neonatal congenital defects and other diseases, Never let it get hot
"4" LDPE
Fresh keeping film, plastic film and other fresh-keeping films are not wrapped on the surface of food and used in the microwave oven: the heat resistance is not strong. Generally, the qualified PE fresh-keeping film will melt when the temperature exceeds 110 ℃, leaving some plastic preparations that cannot be decomposed by the human body, The oil in food can easily dissolve the harmful substances in the preservative film. Therefore, when food is put into the microwave oven, the wrapped preservative film must be removed first
"5" PP
Microwave oven boxes and fresh-keeping boxes generally use PP special for microwave oven (polypropylene, PP special for microwave oven, high temperature resistance 120 ℃, low temperature resistance - 20 ℃). Because of the cost, the cover generally does not use PP special for microwave oven. When put into the microwave oven, the cover should be taken down for use, Use: the only plastic box that can be put into the microwave oven can be reused after careful cleaning. Special attention should be paid to some microwave oven lunch boxes. The box body is indeed made of No. 5 PP, but the box cover is made of No. 1 Pet. Because pet can't withstand high temperature, it can't be put into the microwave oven together with the box body. To be on the safe side, remove the cover before putting the container into the microwave oven
"6" PS
Don't use the microwave oven to cook instant noodles in bowls. It's heat-resistant and cold resistant, but it can't be put into the microwave oven to avoid the release of chemicals due to high temperature (which can be released at 70 ℃). It can't be used to load strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is not good for human body and is easy to cause cancer, You should try to avoid packing hot food in fast food boxes
"No.7" PC
Others: kettle, water cup, milk bottle. When PC glue meets with heat-release bisphenol A, it is widely used, especially in milk bottles. It is controversial because it contains bisphenol A, 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, care should be taken and special attention should be paid when using this plastic container. To deal with the cleaning measures of BPA, the higher the temperature is, the more BPA will be released and the faster the speed is, If your water bottle has a number of 7, the following methods can reduce the risk: ● do not heat when using it. ● do not use dishwasher or dryer to clean the water bottle. ● do not let the water bottle be directly exposed to sunlight. ● use baking soda powder and warm water before the first use, It should be dried naturally at room temperature. Because bisphenol A will release more during the first use and long-term use. If the container has any injury or damage, it is recommended to stop using it, because if there are slight pits on the surface of plastic products, It is easy to hide bacteria. Avoid the repeated use of aging plastic utensils. The plastic name code and corresponding abbreviation code are as follows: polyester-01-pet hdpe-02-hdpe-pvc-03-pvc ldpe-04-ldpe-pp-05-pp (can withstand temperature above 100 ℃) polystyrene 06 PS (heat resistant 60-70 ℃) other plastic codes 07 others in which PP, PE and PVC are abbreviations of English names. Chinese names are polypropylene, polyethylene and PVC respectively, The English full names are: polypropylene, polyethylene, polyvinyl chloride