Polypropylene (PP) is a semi-crystalline thermoplastic. It is made by polymerizing propylene monomers and has high impact resistance, strong mechanical properties, and resistance to a variety of organic solvents and acid and alkali corrosion. It has a wide range of applications in the industry, including packaging materials and labels, textiles (such as ropes, thermal underwear and carpets), stationery, plastic parts and various types of reusable containers, thermoplastic polymer equipment used in laboratories, speakers, automotive parts and polymer banknotes.