What is Polypropylene Thermoplastic Material?
Polypropylene (PP) is a thermoplastic polymer that is prepared catalytically from the monomer propylene. Grades of polypropylene that are commonly used in the commercial market have a level of crystallinity between low-density polyethylene (LDPE) and high-density polyethylene (HDPE). To protect the polymer during plastic injection molding and manufacturing and to enhance end-use performance, additives are applied to all produced polypropylene resins. Polypropylene Plastic Properties At higher temperatures, PP is resistant to stress and cracking, as well as chemical solvents, bases, and acids. While the properties of PP resemble those of polyethylene, there are a few specific differences. For instance, PP will not melt below 160°C whereas polyethylene will begin to anneal at around 100°C. Lower density polypropylene has a higher softening point and a higher rigidity and hardness. Standard polypropylene has a melting point of 320°F (160°C). Polypropylene plastic possesses an outstanding
