I-Polypropylene (PP) iyi-polymer eyengeziwe ye-thermoplastic eyenziwe ngenhlanganisela yama-propylene monomers.Inezinhlobonhlobo zezinhlelo zokusebenza, okuhlanganisa ukupakishwa kwemikhiqizo yabathengi, izingxenye zepulasitiki zemboni yezimoto, nezindwangu.Ososayensi bePhilip Oil Company uPaul Hogan noRobert Banks baqala ukwenza i-polypropylene ngo-1951, futhi kamuva ososayensi base-Italy nabamaJalimane uNatta noRehn nabo benza i-polypropylene.I-Natta yathuthukisa futhi yahlanganisa umkhiqizo wokuqala we-polypropylene eSpain ngo-1954, futhi ikhono lawo lokucwebezela lavusa isithakazelo esikhulu.Ngo-1957, ukuthandwa kwe-polypropylene kwase kunyukile, futhi ukukhiqizwa kwezentengiselwano okubanzi kwase kuqalile kulo lonke elaseYurophu.Namuhla, isiphenduke enye yepulasitiki esetshenziswa kakhulu emhlabeni.
Ibhokisi lemithi elenziwe nge-PP elinesivalo esinamaphiko
Ngokwemibiko, isidingo samanje somhlaba wonke sezinto ze-PP singamathani ayizigidi ezingama-45 ngonyaka, futhi kulinganiselwa ukuthi isidingo sizokhuphuka sibe amathani ayizigidi ezingama-62 ngasekupheleni kuka-2020. Ukusetshenziswa okuyinhloko kwe-PP imboni yokupakisha, okuyinto yenza cishe u-30% wesamba esisetshenziswayo.Okwesibili ukukhiqizwa kukagesi nemishini, okudla cishe u-26%.Imishini yasendlini kanye nezimboni zezimoto zisebenzisa i-10%.Imboni yezokwakha idla u-5%.
I-PP inobuso obushelelezi ngokuqhathaniswa, obungangena esikhundleni seminye imikhiqizo yepulasitiki, njengamagiya namaphedi wefenisha enziwe nge-POM.Indawo ebushelelezi nayo yenza kube nzima ku-PP ukunamathela kwezinye izindawo, okungukuthi, i-PP ayikwazi ukuxhunyaniswa ngokuqinile neglue yezimboni, futhi ngezinye izikhathi kufanele iboshwe ngokushisela.Uma kuqhathaniswa namanye amapulasitiki, i-PP nayo inezici zokuminyana okuphansi, okunganciphisa isisindo kubasebenzisi.I-PP inokumelana okuhle kakhulu nezinyibilikisi eziphilayo ezifana namafutha ekamelweni lokushisa.Kodwa i-PP kulula ukuyixuba ekushiseni okuphezulu.
Enye yezinzuzo eziyinhloko ze-PP ukusebenza kwayo okuhle kakhulu kokucubungula, okungakhiwa ngokubunjwa komjovo noma ukucutshungulwa kwe-CNC.Isibonelo, ebhokisini lemithi le-PP, isivalo sixhunywe emzimbeni webhodlela ngehinji ephilayo.Ibhokisi lamaphilisi lingacutshungulwa ngokuqondile ngokubumba umjovo noma i-CNC.Ihinge eliphilayo elixhuma isivalo iyishidi lepulasitiki elincanyana kakhulu, elingagotshwa ngokuphindaphindiwe (lihamba ebangeni elidlulele eliseduze namadigri angu-360) ngaphandle kokuphuka.Nakuba ihinge eliphilayo elenziwe nge-PP lingakwazi ukuthwala umthwalo, lifaneleka kakhulu isivalo sebhodlela sezidingo zansuku zonke.
Enye inzuzo ye-PP ukuthi ingenziwa kalula nge-copolymerized namanye ama-polymers (afana ne-PE) ukuze yakhe amapulasitiki ayinhlanganisela.I-copolymer ishintsha kakhulu izakhiwo zezinto ezibonakalayo, futhi ingakwazi ukufeza izinhlelo zokusebenza zobunjiniyela eziqinile uma ziqhathaniswa ne-PP ehlanzekile.
Olunye uhlelo lokusebenza olungenakulinganiswa ukuthi i-PP ingasebenza njengezinto zombili zepulasitiki kanye ne-fiber material.
Izici ezingenhla zisho ukuthi i-PP ingasetshenziswa ezinhlelweni eziningi: amapuleti, amathreyi, izinkomishi, izikhwama, iziqukathi zepulasitiki ezikhanyayo namathoyizi amaningi.
Izici ezibaluleke kakhulu ze-PP yilezi ezilandelayo:
Ukumelana namakhemikhali: Ama-alkali ahlanjululiwe nama-asidi awasabelani ne-PP, okuyenza ibe isitsha esifanelekile salolo ketshezi (njengezinto zokuhlanza, imikhiqizo yosizo lokuqala, njll.).
I-Elasticity kanye nokuqina: I-PP inokunwebeka phakathi kohlu oluthile lokuchezuka, futhi izoshintsha ipulasitiki ngaphandle kokuqhekeka esigabeni sokuqala sokuguqulwa, ngakho-ke ngokuvamile ibhekwa njengento "enzima".Ukuqina yitemu lobunjiniyela elichazwa njengekhono lempahla ukonakala (ukuguqulwa kwepulasitiki kunokwakheka okunwebekayo) ngaphandle kokuphuka.
Ukumelana nokukhathala: I-PP igcina isimo sayo ngemva kokusonteka nokugoba okuningi.Lesi sici sibaluleke kakhulu ekwenzeni amahinge aphilayo.
I-Insulation: Impahla ye-PP inokumelana okuphezulu futhi iyinto evikelayo.
I-Transmittance: Ingenziwa ibe umbala obala, kodwa ngokuvamile yenziwa umbala opaque wemvelo ngokudluliswa kombala othile.Uma kudingeka ukuhanjiswa okuphezulu, i-acrylic noma i-PC kufanele ikhethwe.
I-PP iyi-thermoplastic enephuzu lokuncibilika cishe elingu-130 degrees Celsius, futhi iba uketshezi ngemva kokufika endaweni yokuncibilika.Njengamanye ama-thermoplastics, i-PP ingashiswa futhi ipholile ngokuphindaphindiwe ngaphandle kokuwohloka okukhulu.Ngakho-ke, i-PP ingagaywa kabusha futhi itholakale kalula.
Kunezinhlobo ezimbili eziyinhloko: ama-homopolymers nama-copolymers.Ama-copolymers aphinde ahlukaniswe abe ama-block copolymers nama-copolymers angahleliwe.Isigaba ngasinye sinezinhlelo zokusebenza ezihlukile.I-PP ivame ukubizwa ngokuthi "insimbi" yemboni yepulasitiki, ngoba ingenziwa ngokungeza izithasiselo ku-PP, noma yenziwe ngendlela eyingqayizivele, ukuze i-PP iguqulwe futhi yenziwe ngezifiso ukuze ihlangabezane nezidingo ezihlukile zohlelo lokusebenza.
I-PP yokusetshenziswa kwezimboni jikelele i-homopolymer.I-block copolymer PP yengezwe nge-ethylene ukuthuthukisa ukumelana nomthelela.I-copolymer PP engahleliwe isetshenziselwa ukwenza ama-ductile amaningi kanye nemikhiqizo esobala
Njengamanye amapulasitiki, iqala “ezingxenyana” (amaqembu alula) akhiwa ukucwiliswa kwamafutha e-hydrocarbon futhi ahlanganiswe namanye ama-catalyst akhe amapulasitiki ngokusebenzisa i-polymerization noma ukusabela kwe-condensation.
PP 3D ukuphrinta
I-PP ayikwazi ukusetshenziselwa ukuphrinta kwe-3D ngendlela ye-filament.
Ukucutshungulwa kwe-PP CNC
I-PP isetshenziselwa ukucubungula i-CNC kufomu leshidi.Lapho senza ama-prototypes enani elincane lezingxenye ze-PP, ngokuvamile senza imishini ye-CNC kuzo.I-PP inezinga lokushisa eliphansi le-annealing, okusho ukuthi igoba kalula ngenxa yokushisa, ngakho idinga izinga eliphezulu lekhono lokusika ngokunembile.
PP umjovo
Nakuba i-PP inezici ze-semi-crystalline, kulula ukuma ngenxa ye-viscosity yayo encibilikayo ephansi kanye noketshezi oluhle kakhulu.Lesi sici sithuthukisa kakhulu isivinini lapho izinto zigcwalisa isikhunta.Izinga lokuncipha kwe-PP licishe libe ngu-1-2%, kodwa lizohluka ngenxa yezinto eziningi, okuhlanganisa ukucindezela kokubamba, isikhathi sokubamba, izinga lokushisa elincibilikayo, ukushuba kodonga lwesikhunta, izinga lokushisa lesikhunta, kanye nohlobo namaphesenti ezithasiselo.
Ngaphezu kwezicelo zepulasitiki ezijwayelekile, i-PP nayo ifaneleka kakhulu ekwenzeni imicu.Imikhiqizo enjalo ihlanganisa izintambo, amakhaphethi, i-upholstery, izingubo, njll.
Yiziphi izinzuzo ze-PP?
I-PP itholakala kalula futhi ishibhile uma kuqhathaniswa.
I-PP inamandla aphezulu okuguquguquka.
I-PP inobuso obushelelezi ngokuqhathaniswa.
I-PP ifaka umswakama futhi imunca kancane amanzi.
I-PP inokumelana okuhle kwamakhemikhali kuma-acids ahlukahlukene nama-alkali.
I-PP inokumelana nokukhathala okuhle.
I-PP inamandla okuthonya okuhle.
I-PP iyisivikeli esihle sikagesi.
●I-PP ine-coefficient ephezulu yokwandisa okushisayo, okukhawulela izinhlelo zayo zokushisa okuphezulu.
● I-PP isengozini yokonakala imisebe ye-ultraviolet.
● I-PP ayinakho ukumelana nezincibilikisi ezine-chlorine nama-hydrocarbon anephunga elimnandi.
● I-PP inzima ukuyifafaza phezulu ngenxa yezindawo zayo zokunamathela ezimbi.
● I-PP ivutha kakhulu.
● I-PP kulula ukuyi-oxidize.
Isikhathi sokuthumela: Jul-27-2023