I-Polypropylene (PP) iyi-thermoplastic eqinile ecwebezelayo esetshenziswa ezintweni zansuku zonke.Kunezinhlobo ezehlukene ze-PP ezitholakalayo: i-homopolymer, i-copolymer, umthelela, njll. Izakhiwo zayo zemishini, zomzimba, kanye namakhemikhali zisebenza kahle ezinhlelweni ezisukela kwezezimoto nezokwelashwa kuye emaphaketheni.
Iyini i-Polypropylene?
I-Polypropylene ikhiqizwa kusuka ku-propene (noma i-propylene) monomer.Iwumugqa we-hydrocarbon resin.I-chemical formula ye-polypropylene ithi (C3H6)n.I-PP iphakathi kwamapulasitiki ashibhe kakhulu atholakalayo namuhla, futhi Inomthamo ophansi kakhulu phakathi kwamapulasitiki wempahla.Lapho kwenziwa i-polymerization, i-PP ingakha izinhlaka ezintathu zamaketango eziyisisekelo ngokuya ngesimo samaqembu e-methyl:
I-Atactic (i-APP).Ukuhlelwa kweqembu le-methyl elingavamile (CH3).
I-Isotactic (iPP).Amaqembu e-Methyl (CH3) ahlelwe ohlangothini olulodwa lweketango lekhabhoni
I-Syndiotactic (sPP).Ukuhlelwa kweqembu le-methyl (CH3) elishintshanayo
I-PP ingeyomndeni we-polyolefin wama-polymers futhi ingenye yama-polymer amathathu aphezulu asetshenziswa kakhulu namuhla.I-Polypropylene inezicelo-kokubili njengepulasitiki kanye nefayibha-embonini yezimoto, izicelo zezimboni, izimpahla zabathengi, kanye nemakethe yefenisha.
Izinhlobo ezahlukene ze-polypropylene
Ama-homopolymers nama-copolymers yizinhlobo ezimbili eziyinhloko ze-polypropylene ezitholakala emakethe.
I-propylene homopolymeryibanga elisetshenziswa kakhulu lenhloso ejwayelekile.Iqukethe kuphela i-propylene monomer esesimweni esiqinile se-semi-crystalline.Izinhlelo zokusebenza eziyinhloko zihlanganisa ukupakishwa, izindwangu, ukunakekelwa kwezempilo, amapayipi, izimoto, kanye nezicelo zikagesi.
I-polypropylene copolymerihlukaniswe ngama-copolymers angahleliwe kanye nama-block copolymers akhiqizwa yi-polymerizing ye-propene ne-ethane:
1. I-propylene copolymer engahleliwe ikhiqizwa ngokuhlanganisa ndawonye i-ethene ne-propene.Ihlanganisa amayunithi e-ethene, ngokuvamile afika ku-6% ngobuningi, ahlanganiswe ngokungahleliwe kumaketanga e-polypropylene.Lawa ma-polymers ayaguquguquka futhi acace ngokusobala, awenze afanelekele izinhlelo zokusebenza ezidinga ukucaca kanye nemikhiqizo edinga ukubukeka okuhle kakhulu.
2. I-propylene block copolymer iqukethe okuqukethwe kwe-ethene ephezulu (phakathi kuka-5 no-15%).Inamayunithi ama-co-monomer ahlelwe ngephethini evamile (noma amabhulokhi).Iphethini evamile yenza i-thermoplastic ibe nzima futhi ibe brittle kune-co-polymer engahleliwe.Lawa ma-polymer afanele izinhlelo zokusebenza ezidinga amandla aphezulu, njengokusetshenziswa kwezimboni.
Olunye uhlobo lwe-polypropylene i-copolymer yomthelela.I-propylene homopolymer equkethe i-co-mixed propylene random copolymer phase enokuqukethwe kwe-ethylene engu-45-65% ibhekiswa ku-PP impact copolymer.Ama-copolymers omthelela asetshenziswa kakhulu ekupakishweni, ezintweni zendlu, zefilimu, nasekufakweni kwamapayipi, kanye nasezingxenyeni zezimoto nezikagesi.
I-Polypropylene Homopolymer vs. I-Polypropylene Copolymer
I-propylene homopolymerinesilinganiso esiphezulu samandla nesisindo, futhi iqinile futhi inamandla kune-copolymer.Lezi zakhiwo zihlangene nokumelana okuhle kwamakhemikhali kanye nokushisela kwenza kube yimpahla yokuzikhethela ezakhiweni eziningi ezimelana nokugqwala.
I-polypropylene copolymerithambile kodwa inamandla angcono womthelela.Iqinile futhi ihlala isikhathi eside kune-propylene homopolymer.Ijwayele ukuba nokumelana nokuqhekeka kwengcindezi okungcono kanye nokuqina okuphansi kwezinga lokushisa kune-homopolymer ngezindleko zokwehliswa okuncane kwezinye izakhiwo.
Izicelo ze-PP Homopolymer kanye ne-PP Copolymer
Izinhlelo zokusebenza zicishe zifane ngenxa yezakhiwo zazo ezabiwe kakhulu.Ngenxa yalokho, ukukhetha phakathi kwalezi zinto ezimbili kuvame ukwenziwa ngokusekelwe kumibandela engeyona eyobuchwepheshe.
Ukugcina ulwazi mayelana nezakhiwo ze-thermoplastic kusengaphambili kuhlale kunenzuzo.Lokhu kusiza ekukhetheni i-thermoplastic efanele yohlelo lokusebenza.Kuphinde kusize ekuhloleni isidingo sokusetshenziswa kokugcina kuzogcwaliseka noma cha.Nazi ezinye izici ezibalulekile kanye nezinzuzo ze-polypropylene:
Iphoyinti lokuncibilika le-polypropylene.Iphuzu lokuncibilika le-polypropylene lenzeka ebangeni.
● I-Homopolymer: 160-165°C
● I-Copolymer: 135-159°C
Ubuningi be-polypropylene.I-PP ingenye yama-polymers alula phakathi kwawo wonke amapulasitiki wempahla.Lesi sici sikwenza kube inketho efanelekile yezinhlelo zokusebenza ezingasindi/isisindo--zokonga.
● I-Homopolymer: 0.904-0.908 g/cm3
● I-copolymer engahleliwe: 0.904-0.908 g/cm3
● I-copolymer yomthelela: 0.898-0.900 g/cm3
Polypropylene chemical resistance
● Ukumelana okuhle kakhulu nama-asidi axutshiwe futhi agxilile, utshwala nezisekelo
● Ukumelana kahle nama-aldehyde, ama-ester, ama-aliphatic hydrocarbon, nama-ketone
● Ukumelana okulinganiselwe kuma-hydrocarbon anephunga elimnandi nama-halogenated nama-oxidizing agents
Amanye amanani
● I-PP igcina izakhiwo zikagesi nezikagesi emazingeni okushisa aphakeme, ezimweni ezinomswakama, nalapho icwiliswa emanzini.Iwupulasitiki oxosha amanzi
● I-PP inokumelana okuhle nokucindezeleka kwemvelo nokuqhekeka
● Izwela ekuhlaselweni kwamagciwane (amagciwane, isikhunta, njll.)
● Ibonisa ukumelana kahle nokuvalwa inzalo ngesitimu
Izithasiselo ze-polymer njengezichazisi, izinqamuleli zamalangabi, imicu yengilazi, amaminerali, izigcwalisi eziguquguqukayo, okothambisa, okombala, nezinye izithasiselo eziningi zingathuthukisa izici ze-PP ezingokomzimba kanye/noma zemishini.Isibonelo, i-PP ayinakho ukumelana ne-UV, yingakho ukuzinza kokukhanya okunama-amine avinjelwe kuthuthukisa impilo yesevisi uma kuqhathaniswa ne-polypropylene engalungiswanga.
Ukungalungi kwePolypropylene
Ukumelana kahle ne-UV, umthelela, nokuklwebheka
I-Embrittle ngaphansi kuka-−20°C
Izinga lokushisa eliphansi lesevisi eliphezulu, 90-120°C
Ihlaselwe ama-asidi ane-oxidizing kakhulu, ivuvukala ngokushesha kuzincibilikisi ezine-chlorine nama-aromatics
Ukuzinza kokuguga kokushisa kuthinteka kabi ngokuthintana nezinsimbi
Izinguquko ze-post-molding dimensional ngenxa yemiphumela yecrystallinity
Ukunamathela ngopende okungalungile
Izicelo ze-Polypropylene
I-Polypropylene isetshenziswa kabanzi emisebenzini ehlukahlukene ngenxa yokumelana kwayo namakhemikhali okuhle nokushisela.Ezinye izinto ezisetshenziswayo ze-polypropylene zihlanganisa:
Izicelo zokupakisha
Izakhiwo ezinhle zokuvimbela, amandla aphezulu, ukuqedwa okuhle kwendawo, kanye nezindleko eziphansi kwenza i-polypropylene ilungele izinhlelo eziningi zokupakisha.
Ukupakisha okuguquguqukayo.Amafilimu e-PP acace kahle kakhulu ngokubonakalayo kanye nokudluliswa komhwamuko ophansi kuwenza afanelekele ukusetshenziswa emaphaketheni okudla.Ezinye izimakethe zifaka ukunqwabelana kwefilimu enciphayo, amafilimu emboni ye-elekthronikhi, izinhlelo zokusebenza zobuciko bezithombe, namathebhu alahlwayo namanabukeni nokuvalwa.Ifilimu ye-PP itholakala njengefilimu yabalingisi noma i-bi-axially orientated PP (BOPP).
Ukupakisha okuqinile.I-PP ibunjwa ukuze ikhiqize amakhreyithi, amabhodlela, namabhodwe.Iziqukathi ze-PP ezinezindonga ezincane zivame ukusetshenziselwa ukupakisha ukudla.
Izimpahla zabathengi.I-Polypropylene isetshenziswa emikhiqizweni eminingana yasendlini nasezinhlelweni zezimpahla zabathengi, okuhlanganisa izingxenye ezishintshashintshayo, izinto zasendlini, ifenisha, izinto zikagesi, imithwalo, namathoyizi.
Izinhlelo zokusebenza zezimoto.Ngenxa yezindleko zayo eziphansi, izakhiwo ezivelele zemishini, nokubumba, i-polypropylene isetshenziswa kabanzi ezingxenyeni zezimoto.Izinhlelo zokusebenza eziyinhloko zifaka amakesi ebhethri namathreyi, amabhampa, ama-fender liner, i-interior trim, amaphaneli wezinsimbi, nezinsimbi zokulungisa iminyango.Ezinye izici eziyinhloko zokusetshenziswa kwezimoto ze-PP zifaka i-coefficient ephansi yokunwetshwa okushisayo okuqondile kanye namandla adonsela phansi athile, ukumelana namakhemikhali aphezulu kanye nesimo sezulu esihle, ukucutshungulwa, kanye nebhalansi yomthelela/yokuqina.
Imicu nezindwangu.Umthamo omkhulu we-PP usetshenziswa engxenyeni yemakethe eyaziwa ngokuthi imicu nezindwangu.I-PP fiber isetshenziswa ezinhlelweni eziningi, okuhlanganisa i-raffia/slit-film, itheyiphu, ibhande, i-filament eyinqwaba eqhubekayo, imicu eyisisekelo, ibhondi ephothiwe, kanye nentambo eqhubekayo.Intambo ye-PP kanye ne-twine kunamandla kakhulu futhi amelana nomswakama, afaneleka kakhulu ukusetshenziswa olwandle.
Izicelo zezokwelapha.I-Polypropylene isetshenziswa emisebenzini yezokwelapha ehlukahlukene ngenxa yokumelana namakhemikhali aphezulu kanye namagciwane.Futhi, i-PP yebanga lezokwelapha ikhombisa ukumelana okuhle nokuvala inzalo ngesitimu.
Amasirinji alahlwayo asetshenziswa kakhulu kwezokwelapha i-polypropylene.Ezinye izinhlelo zokusebenza zihlanganisa izitsha zezokwelapha, izinto zokuxilonga, izitsha ze-petri, amabhodlela emithanjeni, amabhodlela esampula, amathreyi okudla, amapani, nezitsha zamaphilisi.
Izicelo zezimboni.Amashidi e-polypropylene asetshenziswa kakhulu emkhakheni wezimboni ukukhiqiza amathangi e-asidi namakhemikhali, amashidi, amapayipi, i-Returnable Transport Packaging (RTP), neminye imikhiqizo ngenxa yezindawo zayo ezinjengamandla aphezulu okudonsa, ukumelana nokushisa okuphezulu, nokumelana nokugqwala.
I-PP ingaphinda isetshenziswe ngo-100%.Amakesi ebhethri emoto, izibani zesignali, izintambo zebhethri, imishanelo, amabhulashi, nama-ice scrapers yizibonelo ezimbalwa zemikhiqizo engenziwa nge-polypropylene egaywe kabusha (rPP).
Inqubo yokugaywa kabusha kwe-PP ikakhulukazi ihlanganisa ukuncibilika kwepulasitiki kadoti kuya ku-250°C ukuze kukhishwe ukungcola okulandelwa ukususwa kwama-molecule asele ngaphansi kwe-vacuum kanye nokuqiniswa cishe ku-140°C.Le PP egaywe kabusha ingahlanganiswa ne-virgin PP ngenani elifika ku-50%.Inselele enkulu ekugayweni kabusha kwe-PP ihlobene nenani elisetshenzisiwe—njengamanje cishe amabhodlela e-PP angu-1% ayagaywa kabusha, uma kuqhathaniswa nezinga elingu-98% lokugaywa kabusha kwamabhodlela e-PET ne-HDPE ndawonye.
Ukusetshenziswa kwe-PP kuthathwa njengokuphephile ngoba akunawo umthelela ophawulekayo ngokombono wezempilo nokuphepha emsebenzini, ngokobuthi bamakhemikhali.Ukuze ufunde kabanzi mayelana ne-PP bheka umhlahlandlela wethu, ohlanganisa ukucubungula ulwazi nokuningi.
Isikhathi sokuthumela: Jul-03-2023