Polypropylene (PP) is one kind of semi-crystalline thermoplastic.High impact resistance, strong mechanical properties, resistance to a variety of organic solvents and acid and alkali corrosion.It is widely used in the industry and is one of the common polymer materials.Australian coins are also made of polypropylene.
Melting point: 164 ~ 170 ℃
Water solubility: extremely difficult to dissolve in water