PP sirilan (polypropylène sirilan) ɲɛfɔli ka ɲɛ, o nafa ka bon pakew dilanni baara la ani musaka dɔgɔyali la. Nin gafe in bɛ ɲɛfɔli kɛcogo jɔnjɔnw ɲɛfɔ: a bonya (5–19mm), a janya (0,35–0,80mm), a kari fanga (45–230kg), a sanfɛla laban, ani a kuru hakɛ. Ni an y’a faamu cogo min na paramɛtiri kelen-kelen bɛɛ bɛ nɔ bila minɛnw bɛnkan na, doni lakanani, ani musaka bɛɛ lajɛlen na, o bɛ sannikɛlaw dɛmɛ u ka sirilan ɲuman ɲɛfɔ u ka baarakɛcogo la. Ka kɛɲɛ ni izini sariyaw ye, fɛn ɲɛfɔcogo ɲuman bɛ dɔ bɔ baarakɛbaliya waati la, ka doni sabatili ɲɛ, ani ka fɛnw musakaw ɲɛnabɔ ka ɲɛ.