What type of plastic can be filled with boiling water?
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- Unsolveddestoon
- 2021-08-09 20:22
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- 1Flooranonymity
- 2021-08-12 09:23
Polypropylene, the middle digit of the recycling symbol is 5
Among the commonly used plastics, only PP itself has heat resistance, hydrolysis resistance, chemical solvent resistance, and chemical stability that can meet the needs of potable boiling water. Other materials have more or less problems. For example, polyethylene has insufficient heat resistance and will soften when filled with boiling water; the glass transition temperature of polystyrene is between 85-100 degrees Celsius, and it may become soft when filled with boiling water. It is too brittle under normal/low temperature conditions, and polystyrene will slowly decompose at high temperatures, so it is best not to use it for boiling water; polycarbonate (the material of most "space cups") has good temperature resistance, High impact strength, originally used in water bottles, water cups and other uses, but it will decompose BPA and other harmful chemicals at high temperatures, so it has been banned from being used in many countries and regions such as Europe, Canada, and so on. .
Among the commonly used plastics, only PP itself has heat resistance, hydrolysis resistance, chemical solvent resistance, and chemical stability that can meet the needs of potable boiling water. Other materials have more or less problems. For example, polyethylene has insufficient heat resistance and will soften when filled with boiling water; the glass transition temperature of polystyrene is between 85-100 degrees Celsius, and it may become soft when filled with boiling water. It is too brittle under normal/low temperature conditions, and polystyrene will slowly decompose at high temperatures, so it is best not to use it for boiling water; polycarbonate (the material of most "space cups") has good temperature resistance, High impact strength, originally used in water bottles, water cups and other uses, but it will decompose BPA and other harmful chemicals at high temperatures, so it has been banned from being used in many countries and regions such as Europe, Canada, and so on. .