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Identification and classification of disposable pallets
It’s common to eat out, if you can’t finish eating or order too much. It's a pity to waste food. You can't finish a meal, so you can pack it and go around. In the era of national takeout, disposable packaging boxes that are in close contact with food are indispensable.
No. 1 Polyethylene Terephthalate (PET): Plastic bottles of mineral water, fruit juice, and carbonated drinks are made of it;
No. 2 high-density polyethylene (HDPE): a common barrel for water in barrels is used;
No. 3 polyvinyl chloride (PVC): plastic used in general plastic pipes;
No. 4 polyethylene (PE): common cling film, plastic film, etc. Harmful substances are produced at high temperature, and poisonous substances enter the human body with food, which may cause diseases such as breast cancer and birth defects of newborns;
No. 5 Polypropylene (PP): This is the most heat-resistant material, and it is commonly used in microwave-heated plastic appliances;
No. 6 polystyrene (PS): Many milk tea cup lids use it now;
No. 7 often refers to several plastics such as polycarbonate (PC): PC is used as a raw material for most baby bottles.
No. 5 plastic is relatively heat-resistant and can withstand high temperatures of about 200 degrees Celsius, so it can be heated in a microwave oven, and repeated heating will not cause major problems. The heat resistance of No. 1, No. 6 and other plastics is relatively poor. It is best not to heat them directly, and do not put foods that are too hot. Of course, they cannot be used repeatedly. Of course, not being able to enter the microwave oven does not mean it is unsafe. On the contrary, non-PP lunch boxes are as healthy as long as they are used correctly.
If you use non-food plastic bags to pack food, the polyvinyl chloride contained in it will easily produce harmful substances after being heated, causing liver and kidney, central nervous system, and blood system diseases. Even if you use plastic bags for food, because their ingredients are mostly polyethylene, they are not easy to decompose as long as they are below 110 degrees Celsius, so there is generally no problem when you pack water-containing food with a temperature not exceeding 100 degrees Celsius. But the use of plastic lunch boxes first depends on whether there is a PP5 logo.