Polypropylene (PP) is a linear hydrocarbon polymer, expressed as CnH2n. It is a type of polyolefin that is slightly harder than polyethylene. It is a commodity plastic with low density and high heat resistance. It finds application in packaging, automotive, consumer goods, medical, cast films, etc.
Polypropylene is one of the most versatile polymers with applications both as a plastic and as a fibre. Polypropylene uses range from plastic packaging, plastic parts for machinery and equipment and even fibres and textiles. The packaging industry uses polypropylene as a substitute for paper and cellophane, mostly due to its low cost and flexibility. Polypropylene is also frequently used in the automotive industry to produce batteries, bumpers, instrument panels, interior elements, and door trims. Because of its chemical, bacterial, and steam sterilization resistance, polypropylene is employed in a variety of medical applications as well, such as disposable syringes, diagnostic devices, Petri dishes, intravenous bottles, and pill containers.
