At present, the bottom signs of plastic products are:
A, "1" Peter
Mineral water bottle, carbonated beverage bottle
Don't recycle the hot water in the beverage bottle.
Usage: High temperature resistance of 70℃, only suitable for filling warm drinks or frozen drinks. It is easy to deform when it is filled with high-temperature liquid or heated, and harmful substances will be dissolved out. Moreover, scientists have found that after 1 plastic products are used 10 months, DEHP, a carcinogen, may be released, which is toxic to testicles.
Second, "No.2" HDPE
Cleaning products, bath products
If the cleaning is not thorough, it is recommended not to recycle.
Usage: It can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning supplies and becoming a hotbed of bacteria. You'd better not recycle them
Third, "No.3" PVC
At present, it is rarely used for food packaging, so it is best not to buy it.
Fourth, "No.4" LDPE
Plastic wrap, plastic film, etc.
Don't put plastic wrap on the surface of food and put it in the microwave oven.
Uses: heat resistance is not strong. Generally qualified PE plastic wrap will melt when the temperature exceeds 1 10℃, leaving some plastic preparations that cannot be decomposed by human body. Moreover, food is wrapped and heated with plastic wrap, and the oil in food can easily dissolve the harmful substances in plastic wrap. Therefore, before putting food into the microwave oven, you must first remove the wrapped plastic wrap.
Verb (abbreviation of verb) "No.5" PP
microwave oven box
When you put it in the microwave oven, take off the cover.
Usage: The only plastic box that can be put into the microwave oven can be reused after careful cleaning. It should be noted that some microwave lunch boxes are indeed made of No.5 PP, but the lid is made of No.0 PE/kloc-0. Because PE is not resistant to high temperature, it can't be put in the microwave oven with the box. To be on the safe side, open the lid before putting the container in the microwave oven.
Sixth, "No.6" PS
Bowl instant noodle box, fast food box
Don't cook a bowl of instant noodles in the microwave oven.
Usage: Heat-resistant and cold-resistant, but it can't be put into the microwave oven to avoid releasing chemicals when the temperature is too high. Moreover, it can't be used to hold strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is bad for human body and easy to cause cancer. Therefore, you should try to avoid packing hot food in fast food boxes.
Seven, "No.7" computer
Other categories: kettle, water cup, milk bottle.
PC glue releases bisphenol A when heated.
Uses: A widely used material, especially in milk bottles, is controversial because it contains bisphenol A. Lin Hanhua, an associate professor in the Department of Biochemistry of City University of Hong Kong, said that in theory, as long as bisphenol a 100% is converted into plastic structure in the process of manufacturing PC, it means that the product contains no bisphenol A at all, let alone released.
However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released into food or drink. Therefore, when using this kind of plastic container, we should be especially careful.
The higher the temperature, the more bisphenol A remaining in PC is released and the faster it is. Therefore, PC water bottles should not be used to hold hot water, so as not to increase the release speed and concentration of bisphenol A (if any). If your kettle number is 7, the following methods can reduce the risk:
1. Don't use the dishwasher or bowl dryer to wash the kettle.
2. Do not heat when using.
Don't let the kettle be exposed to direct sunlight.
4. Before the first use, wash it with baking soda powder and warm water and dry it naturally at room temperature. Because bisphenol A will release more during the first use and long-term use.
5. If the container is injured or damaged, it is suggested to stop using it, because if there are tiny pits on the surface of plastic products, it is easy to hide bacteria.
6. Avoid reusing aging plastic appliances.
Extended data:
Plastic is one of the great inventions of mankind, but it is also a headache source of garbage, and it is harmful to the environment because it is difficult to degrade. In fact, waste plastic is not rubbish, and it can be turned into treasure through environmental protection technology. The main materials of plastic bottles are generally PP (polypropylene) and PET (polyethylene terephthalate), which is one of the important raw materials for making clothes fabrics.
According to Beijing Textile Research Institute, this kind of clothes is very cool to wear, because this kind of fabric has the function of "absorbing moisture and drying quickly", which makes consumers wear it both environmentally friendly and comfortable. "Our corporate philosophy is environmental protection. We not only use renewable resources as raw materials, but also strive to create non-emission standards in the production process. " Mao Youjun said, "The traditional way to produce polyester internationally is chemical refining. After technological innovation, the quality of our products has reached the standard of the original products."
Baidu encyclopedia-plastic bottle