The number "1" stands for PET (polyethylene terephthalate), which is commonly used in mineral water, carbonated drinks and energy drink bottles. Its heat resistance to 70℃ is easy to deform, long time repeated use may release harmful substances. In high temperature weather, try not to store mineral water in the open air or in the car for a long time, and do not flush the boiling water directly into the mineral water bottle.
The number "2" stands for HDPE (high density polyethylene) : common white medicine bottles, cleaning products, bath products. Do not recycle, for example, as a water cup, or as a storage container for other items.
The number "3" represents PVC (polyvinyl chloride) : common raincoats, building materials, plastic film, plastic boxes, etc. Good plasticity, cheap, so the use of very common. It can only be heat resistant at 81℃. It is easy to produce bad substances at high temperature and is rarely used for food packaging. Difficult to clean and easy to remain, do not recycle. PVC is not yet used to hold drinks.
Number "4" on behalf of LDPE (low density polyethylene) : cling film, plastic film on the market at present use this kind of material, but its heat resistance is not strong, but to use in microwave oven are harmful, there is no real evidence, but still recommend before put food in the microwave, remove the wrapped in plastic wrap.
The number "5" stands for PP (polypropylene) : the microwave lunch box is made of this material, which is resistant to high temperature of 130℃ and has poor transparency. This is a plastic box that can be put into the microwave oven and can be reused after careful cleaning. Some lunch box body to 5 PP manufacturing, but the box cover is 6 PS (polystyrene) manufacturing, PS transparency is good, but not high temperature resistance, so can not be put into the microwave oven with the box body.
Numeral "6" representative PS (polystyrene) : it is to be used at making a bowl to install bubble face box, the material that foaming fast food box is qualitative, cannot be used at install strong acid (be like orange juice), strong alkaline material, cannot put into microwave oven, lest release a harmful material because of temperature is too high.
The number "7" stands for PC (other categories) : common kettle, space cup, baby bottle. Poor quality or improper use may precipitate the substance bisphenol A, which is harmful to human health. Do not heat it at high temperature and do not direct sun exposure when using it.
