Polypropilene (PP) nikintu gikomeye, gikomeye, kandi kristaline. Ikozwe muri propene (cyangwa propylene) monomer. Uyu murongo wa hydrocarbon resin ni polymer yoroheje muri plastiki y'ibicuruzwa byose. PP ije nka homopolymer cyangwa nka copolymer kandi irashobora kuzamurwa cyane ninyongera. Irasanga porogaramu mubipfunyika, ibinyabiziga, umuguzi mwiza, ubuvuzi, firime za firime, nibindi PP yahindutse ibikoresho byo guhitamo, cyane cyane mugihe ushaka polymer ifite imbaraga zisumba izindi (urugero, vs Polyamide) mubikorwa bya injeniyeri cyangwa ushakisha gusa ikiguzi cyigiciro mumacupa yerekana (v. PET).