The secret of the bottom of plastic water bottle

The bottom of plastic water bottle has a triangular recovery mark with an arrow. The bottle is made of what material. We can tell by the numbers in the logo.

"1" - PET (polyethylene terephthalate)

More common in mineral water bottles, beverage bottles, this material is heat-resistant to 70 degrees, can be a short time with constant warm water, can not be loaded with acid-base beverages or high temperature liquid, it should not be exposed to sun, otherwise it will produce harmful substances.

"5" - PP (polypropylene)

PP plastic cup is made of polypropylene, it has good thermal stability and insulation, safe and harmless to human body. The product can be sterilized and sterilized at temperatures above 100 DEG C, and can not deform at 150 DEG C without being subjected to external force, and no pressure is placed in boiling water.

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