Such as mineral water bottles and carbonated beverage bottles.
Suggestion: Don't recycle hot water from beverage bottles.
2. High density polyethylene -02 HDPE?
Such as: cleaning supplies, bath supplies.
Suggestion: recycling is not recommended if the cleaning is not thorough.
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
3.PVC-03 PVC？
Such as: some decorative materials.
Usage: this material is easy to produce harmful substances at high temperature, and even it will be released during manufacturing. Toxic substances enter the human body with food, which may cause diseases such as breast cancer and birth defects of newborns. Containers of this material are rarely used to package food. If it is in use, don't let it get hot.
4. Low density polyethylene -04LDPE?
Such as: cling film, plastic film, etc.
Suggestion: Don't wrap the 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.
5. Polypropylene -5 PP (temperature resistance above 100℃)
Such as microwave oven lunch box.
Suggestion: Take off the lid when you put it in the microwave oven.
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.
6. polystyrene -06 PS (heat resistance 60-70 degrees, hot drinks will produce toxins, and styrene will be released when burning)?
Such as: instant noodle box in bowl, fast food box.
Suggestion: Don't cook instant noodle bowls 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. And it cannot be used to load strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is unfavorable to human body and easy to cause cancer. Therefore, you should try to avoid packing hot food in fast food boxes.
7. Other plastic codes -07 Other?
Such as: kettle, water cup, milk bottle.
Suggestion: PC glue releases bisphenol A when exposed to heat.
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.
waste plastics
There are three kinds of plastic products widely used in food packaging: polyvinyl chloride, polyethylene and polystyrene. Holding edible oil for a short time is harmless to human health. But using them for cooking oil for a long time will pollute food and cause harm to human body.
This is because this kind of packaging bottle has the characteristics of high transparency and easy aging, and it will produce a strong smell under the action of oxygen, ozone and ultraviolet rays in the air. In addition, the polymer itself will age, and if it is used for long-term storage of edible oil, it is easy to deteriorate these foods.
In addition, the element vinyl chloride in PVC is not only toxic, but also easy to decompose in acid and oil, separating out highly toxic hydrogen chloride and chlorine gas. Plasticizers such as phthalates added to PVC are toxic, and lead, cadmium and organotin used as stabilizers are toxic chemicals, which are highly toxic and easily soluble in oil.
Although plastic polystyrene is a low toxic substance, its components styrene, volatile components ethylbenzene and cumene are toxic and easily soluble in oil. Plastic polyethylene itself is not toxic. But when it comes into contact with oil, it can decompose and separate out low molecular compounds, and these low molecular elements will be toxic when dissolved in oil.
The above contents refer to:
Baidu encyclopedia-plastic bottle bottom label
Baidu encyclopedia-plastic bottle