I-polypropylene enezinhlobo ezintathu, noma i-copolymer engahleliweipayipi le-polypropylene, ibizwa ngesifinyezo se-PPR. Le nto isebenzisa ukushisela kokushisa, inamathuluzi okushisa akhethekile kanye namathuluzi okusika, futhi i-plasticity ephezulu. Izindleko nazo zinengqondo impela. Uma kungezwa ungqimba lokuvikela, ukusebenza kokuvikela kuyathuthuka futhi udonga lwamapayipi, ngaphandle kokuhlangana phakathi kwezintambo zangaphakathi nezangaphandle, nalo lubushelelezi kakhulu.

Ngokuvamile isetshenziswa emapayipini angcwatshwe ngaphambilini emithonjeni ejulile noma ezindongeni ezihlanganisiwe.Ipayipi le-PPRIsebenza iminyaka efinyelela kwengama-50, inentengo efanelekile, isebenza kahle, imelana nokushisa futhi igcina ukushisa, imelana nokugqwala, ibushelelezi futhi ayikhuli odongeni olungaphakathi, iphephile futhi ithembekile ohlelweni lwamapayipi. Ukuqinisekisa ukuphepha kwesistimu, kudingeka imishini eyinkimbinkimbi kanye nezisebenzi ezifanelekayo ekwakheni, okunezidingo zobuchwepheshe obuphezulu.

Imibala ethambile, efanayo—kunokuba ibe yimibala eguquguqukayo etholakala kwamanye amapayipi amanzi—inikezaIpayipi lamanzi le-PP-Risici esikhangayo nombala. (Abathengi bavame ukucabanga ukuthi umbala omhlophe ungcono kakhulu kumapayipi e-PP-R, kodwa umbala awuyona indlela yokulinganisa ikhwalithi; ikhwalithi yamapayipi amanzi e-PP-R ihlukile kweyamapayipi e-PP-R, futhi umbala wepayipi lamanzi awunalutho oluhlobene nawo (kukhona neminye imibala eyengezwe nge-masterbatch yombala). Noma yimuphi umbala ungenziwa inqobo nje uma i-masterbatch yombala ikhona, futhi ngeke yonakalise noma ithinte ikhwalithi ye-PP. Ngakho-ke, ama-R, akunandaba ukuthi umbala wepayipi lamanzi uyini.

Ngokuvamile, izinto zokusetshenziswa ze-PP-R ezimsulwa kuphela ezingasetshenziswa ukudala izimpahla ezimhlophe. Isibonelo, kuyilapho eminye imikhiqizo yombala ecutshungulwa ngama-masterbatches ombala ihlanganiswa nezinto ezisetshenzisiwe, izinto ezilahliwe, nezinto zasekhoneni, umbala wemikhiqizo ekhiqizwa ngokungeza izinto ezisetshenzisiwe, izinto ezilahliwe, nezinto zasekhoneni awuthambile futhi awulingani. Umbala womkhiqizo ngeke uthintwe yizinto ezisetshenzisiwe, njll. Ingaphakathi nengaphandle lomkhiqizo kufanele libe nesici futhi liyisicaba; amaphutha afana namabhamuza omoya, ukugoba okukhanyayo, imifantu, kanye nokungcola akwamukeleki.

Zonke izinto eziyisisekelo zamapayipi amanzi amahle e-PP-R ziyi-PP-R. (ngaphandle kwezithasiselo). Zibukeka zimsulwa, zinobuso obubushelelezi kanye nesibambo esikhululekile. Amapayipi e-PP-R okulingisa azwakala ethambile. Ngokuvamile, izinhlayiya ezirhabaxa zithambekele kakhulu ekufakeni ukungcola; i-polypropylene iyisakhi esiyinhloko samapayipi e-PP-R. Amapayipi amabi anuke ngendlela exakile, kanti amapayipi amahle awanuki. Ngokuvamile, kuhlanganiswa i-polyethylene esikhundleni se-polypropylene.

Izinga lokushisa elijwayelekile lokushisela lamapayipi e-PP-R liphakathi kuka-260 no-290°C. Ikhwalithi yokushisela izoqinisekiswa kangcono kulawa mazinga okushisa. Umkhiqizo ungangena kalula ekhanda lokushisela ngesikhathi sokushisela uma imingcele yokushisela ijwayelekile. Ngaphezu kwalokho, amaqhubu okuqongelela komkhiqizo acishe abe uketshezi, okubonisa ukuthi awadalwanga ngezinto zokusetshenziswa ze-PP-R zangempela.

Lo mkhiqizo futhi awenziwa ngezinto zokusetshenziswa zangempela ze-PP-R uma amaqhubu okuqongelela ukushisela engaphola futhi aqine ngokushesha (ngokuvamile ngaphakathi kwemizuzwana eyi-10). Lokhu kungenxa yokuthi i-PP-R inomphumela wokulondoloza ukushisa oqinile, okusho ukuthi izinga layo lokupholisa lizohamba kancane ngokwemvelo.
Hlola ukuthi izixhumi zamapayipi zidwetshiwe yini nokuthi ububanzi bangaphakathi bepayipi buphambene yini. Ububanzi bangaphakathi bepayipi elihle le-PP-R abukwazi ukudwetshwa, futhi akulula ukugoba.