1. Ukubuka konke kwe-TPU
I-Polyurethane ye-Thermoplastic (TPU)iyi-elastomer ye-copolymer eqondile esebenza kahle kakhulu ehlanganisa izici eziphakeme zerabha kanye nepulasitiki yobunjiniyela. Ibonisa ukuguquguquka okuhle kakhulu, amandla okusebenza, ukumelana nokuguguleka, kanye nokucutshungulwa kwe-thermoplastic. Ngokungafani nerabha yendabuko exhunywe nge-cross-linked, i-TPU inezakhiwo zomzimba ezikwazi ukuguquguquka ezakhiwe yizibopho ze-hydrogen, ezenza kube lula ukufudumala, ukuncibilika kanye nokubumba okuphindaphindiwe ngaphandle kokuwohloka okukhulu kokusebenza. Lesi sici esiyingqayizivele senza i-TPU ibe ngenye yezinto ezisebenziseka kakhulu ze-thermoplastic elastomer (TPE) ezisetshenziswa kabanzi ekukhiqizeni izimboni, izimpahla zabathengi, izimoto, ezokwelapha kanye neminye imikhakha.
Ukusebenza kwemikhiqizo ye-TPU eqediwe kunqunywa ngokuyisisekelo ukwakheka kwayo kwezinto zokusetshenziswa, isilinganiso sokulinganisa kanye nenqubo yokwenza i-polymer. Zonke izinto ze-TPU zezentengiselwano zenziwe i-polymer kusukela ezintweni ezintathu zokusetshenziswa eziyinhloko: ama-polyol e-long-chain, ama-diisocyanates, kanye ne-short-chain extenders.
2. Izingxenye Eziyinhloko Zezinto Zokusetshenziswa Ezingavuthiwe ze-TPU
I-TPU iyi-copolymer yamabhulokhi ahlukaniswe ngezigaba enziwe ngezigaba ezithambile neziqinile ezishintshanayo. Izigaba ezithambile zinikeza i-TPU ukuguquguquka, ukuqina kanye nokumelana nokushisa okuphansi, kuyilapho izingxenye eziqinile zinikeza ukuqina, amandla okuthamba, ukumelana nokuguguleka kanye nokuqina kokushisa. Izinto ezintathu zokusetshenziswa ezibalulekile zihambisana nokwakheka kwalezi zakhiwo ezimbili zezigaba ngokulandelana.
2.1 Ama-Polyols anochungechunge olude (Izinto Ezithambile Zokusetshenziswa)
Ama-polyol anezinkinobho ezinde (ama-diol anezinkinobho ezinde) ayizinto eziyinhloko zokwakha izingxenye ezithambile ze-TPU, enesisindo sama-molecule esisukela ku-1000 kuya ku-3000 g/mol. Angumthombo oyinhloko wokuqina nokuguquguquka kwe-TPU. Ngokwesakhiwo samakhemikhali, ama-polyol ahlukaniswe kakhulu ngezigaba ezimbili, ezinquma ukuhlukaniswa okuyisisekelo kanye nomehluko wokusebenza okuyinhloko kwe-TPU.
I-PolyesterI-Polyol: Yenziwe kusukela ekusabeleni kwe-polycondensation kwama-dicarboxylic acid nama-diols. I-TPU ekhiqizwa ngama-polyester polyols inamandla amakhulu okusebenza, ukumelana nokuklwebheka, ukumelana nowoyela kanye nokumelana nokuguga. Inamandla aphezulu okudonseka kanye nokumelana nokudabuka, futhi ifaneleka ekukhiqizeni izingxenye eziguga kakhulu, izimbozo zezimboni, izinto zezicathulo kanye nemikhiqizo yokunamathela. Kodwa-ke, i-TPU esekelwe ku-polyester inokumelana okuncane kwe-hydrolysis kanye nokuqina okuphansi kwezinga lokushisa, futhi ithambekele eku-hydrolysis kanye nokuwohloka ezindaweni ezinomswakama isikhathi eside.
I-PolyetherI-Polyol: Yenziwe nge-polymerization yokuvula indandatho yama-monomers e-ether. I-TPU esekelwe kwi-polyether inokumelana okuhle kakhulu kwe-hydrolysis, ukuguquguquka kwezinga lokushisa eliphansi, ukumelana namanzi kanye nokumelana namagciwane. Ihlala iguquguquka futhi izinzile ezindaweni ezishisa kakhulu, futhi akulula ukuyiguguleka umswakama namagciwane. Isetshenziswa kabanzi kumafilimu angangeni manzi, izesekeli ezingaphansi kwamanzi, izintambo zezintambo nekhebula, kanye nezingxenye ezimelana nokushisa okuphansi. Ukushiyeka kwayo kusekumelaneni nokuguguleka okuphansi kancane kanye nokumelana namafutha uma kuqhathaniswa ne-polyester TPU.
2.2 Ama-Diisocyanates (Izinto Eziqinile Ze-Core Core Raw Material)
Ama-Diisocyanates angama-monomer asabelayo aqukethe amaqembu asebenzayo e-NCO, asabela namaqembu e-hydroxyl ama-polyol kanye ne-chain extenders ukuze akhe izakhiwo ze-hard segment segment eziqinile, futhi ayisihluthulelo sokunquma ubulukhuni, ukuqina kanye nokuqina kokushisa kwe-TPU. I-diisocyanate esetshenziswa kakhulu ekukhiqizweni kwe-TPU yezimboni yi-MDI (Methylene Diphenyl Diisocyanate), enezakhiwo zamakhemikhali ezizinzile, umsebenzi wokuphendula ophezulu kanye nokuguquguquka okuphansi, futhi ifaneleka kakhulu emikhiqizweni eminingi ye-TPU ejwayelekile nesebenza kahle.
Ngaphezu kwalokho, ama-diisocyanate ebanga elikhethekile njenge-HDI ne-IPDI asetshenziselwa ukuhlanganisa i-TPU ye-aliphatic. I-TPU enjalo ayinaso isakhiwo sendandatho ye-benzene ku-molecule chain, ikhombisa ukumelana okuhle kakhulu kokuphuzi, ukuzinza kokukhanya kanye nokumelana nesimo sezulu, futhi isetshenziselwa ngokukhethekile imikhiqizo yangaphandle, izingxenye zokuhlobisa ezisobala, izingxenye zangaphandle zezimoto kanye nemikhiqizo ehambisana nombala wezinga eliphezulu.
2.3 Izandiso Zeketanga Ezifushane (Izinto Eziqinile Eziwusizo Zesegment)
Izandiso zeketanga ziyi-diol ezimfushane ezinesisindo esiphansi sama-molecule (ikakhulukazi i-1,4-Butanediol, i-BDO), ezisabela ngama-diisocyanates amaningi ukuze zakhe izifunda eziqinile. Zidlala indima ebalulekile ekulungiseni ubulukhuni, i-modulus kanye nezakhiwo zemishini ze-TPU. Ngokushintsha isilinganiso sokwengeza sezandiso zeketanga, abakhiqizi bangalawula ngokunembile ububanzi bobulukhuni be-TPU kusukela ku-60 Shore A (isimo serabha esithambile) kuya ku-85 Shore D (isimo sepulasitiki esiqinile).
Isakhiwo sesigaba esiqinile esakhiwe yizandisi zeketanga kanye nama-diisocyanates sakha amaphuzu okuxhumanisa ngokomzimba ngokubopha i-hydrogen phakathi kwamaketanga e-molecule, okuqinisekisa ukuthi i-TPU inokuqina okufana nerabha ekushiseni kwegumbi, futhi ingancibilikiswa futhi igeleze ekushiseni okuphezulu ukuze ifakelwe umjovo, i-extrusion, i-blow molding kanye nokunye ukucubungula kwe-thermoplastic.
3. Ukuhlukaniswa kwe-TPU Ngokusekelwe kuFomula Yezinto Ezingavuthiwe
Ngokusho kohlobo lwezinto zokusetshenziswa ze-polyol, izinto zokusetshenziswa ze-TPU zezimboni zihlukaniswe kakhulu zibe uchungechunge oluthathu, oluhlanganisa izimo eziningi zokusetshenziswa:
I-TPU ye-Polyester: Ibuswa yizinto zokusetshenziswa ze-polyester polyol, ezinamandla aphezulu, ukumelana nokuguguleka kanye nokumelana namakhemikhali, ifanele izingxenye ezingagugi ezimbonini, amathe ezicathulo, amafilimu esikhumba kanye nezinto zokubopha.
I-TPU ye-Polyether: Ngokusekelwe ezintweni zokusetshenziswa ze-polyol ze-polyether, ezinokumelana okuphezulu kwe-hydrolysis kanye nokusebenza kahle kwezinga lokushisa eliphansi, ezisetshenziswa kabanzi kumafilimu angangeni manzi, izesekeli zezokwelapha, izinto zekhebula kanye nezingxenye zemishini ezingabanda.
I-TPU Eguquliwe Ekhethekile: Ngokusekelwe ezintweni ezintathu eziyisisekelo zokusetshenziswa, engeza izithasiselo ezisebenzayo (izithibi zomlilo, ama-anti-ultraviolet agents, izithibi zokuqina, njll.) noma usebenzise amafomula e-polyol ahlanganisiwe ukuze ukhiqize izinto ze-TPU ezivimbela umlilo, ezingamelani nesimo sezulu, ezisobala, ezilwa namagciwane kanye nezinye izinto ezikhethekile ze-TPU zezimo ezenzelwe wena ezisezingeni eliphezulu.
4. Izakhiwo Eziyinhloko Ezinqunywa Yizinto Ezingasetshenzisiwe
Isilinganiso sokufanisa kanye nohlobo lwezinto zokusetshenziswa ze-TPU kunquma ngqo ukusebenza kokugcina kwezinto, okubonisa izici ezicacile ezilungisekayo:
- Ukulungiswa Kobulukhuni: Ukulungisa isilinganiso sezingxenye eziqinile (i-diisocyanate + i-chain extender) kungaholela ekushintsheni okuqhubekayo kobulukhuni be-TPU, okumboza i-elastomer ethambile ibe yipulasitiki yobunjiniyela eqinile.
- Izakhiwo Zemishini: Izinto zokusetshenziswa ze-polyester ziletha amandla aphezulu okudonseka kanye nokumelana nokuguguleka; izinto zokusetshenziswa ze-polyether zithuthukisa ukuqina kanye nokumelana nokukhathala.
- Ukuzivumelanisa Nemvelo: I-Polyether TPU imelana ne-hydrolysis kanye nokushisa okuphansi; izinto zokusetshenziswa ze-aliphatic diisocyanate zithuthukisa ukumelana nesimo sezulu kanye nokusebenza kokulwa nokuphuzi.
- Ukusebenza Kokucubungula: Ukusatshalaliswa kwesisindo sama-molecule kwezinto zokusetshenziswa okunengqondo kuqinisekisa ukugeleza okuhle kokuncibilika, okuvumela i-TPU ukuthi izivumelanise nobuchwepheshe obuhlukahlukene bokucubungula i-thermoplastic futhi isekele ukucubungula kabusha okusetshenzisiwe.
5. Izici Zokukhiqiza Nokucubungula
Izinto zokusetshenziswa ze-TPU zikhiqizwa nge-bulk polymerization noma i-solution polymerization. Ngemva kokulinganisa okunembile kwama-polyol, ama-diisocyanates kanye ne-chain extenders, izinto zidlula ku-polymerization yokushisa okuphezulu, ukusabela kwe-chain extension, ukupholisa kanye ne-pelletizing ukuze kwakhiwe izinto zokusetshenziswa ze-TPU pellet ezifanayo. Yonke inqubo yokukhiqiza ayinazo izinto zokusetshenziswa ze-plasticizer, futhi izinto zokusetshenziswa eziqediwe azinabo ubuthi futhi zinobungani nemvelo, zihlangabezana nezindinganiso zokuvikela imvelo zomhlaba wonke njenge-RoHS kanye ne-REACH.
Njengezinto ezisetshenziswa yi-thermoplastic, ama-pellet ezinto zokusetshenziswa ze-TPU angacutshungulwa ngqo ngemishini yepulasitiki evamile. Izinto ezisele kanye nemikhiqizo elahliwe ekhiqizwa ngesikhathi sokucubungula zingaphinde zisetshenziswe, zincibilikiswe futhi zisetshenziswe kabusha, ngokulahlekelwa kwezinto okuphansi kanye nesilinganiso esiphezulu sokusetshenziswa kwezinsiza, okuhambisana nomkhuba wokuthuthukiswa kokukhiqiza okuluhlaza.
6. Izicelo Eziyinhloko Zezinto Zokusetshenziswa Ezingavuthiwe ze-TPU
Ngokuzuza ekusebenzeni okulungisekayo kwamafomula ezinto zokusetshenziswa, izinto zokusetshenziswa ze-TPU zisetshenziswa kabanzi ezimbonini eziningi:
- Imboni Yezimoto: Izingxenye zangaphakathi zezimoto, izingxenye ezimunca ukushaqeka, amapayipi angangeni manzi, ucingo kanye nezimbobo zekhebula, ezithembele ekuqineni okuphezulu kanye nokumelana nesimo sezulu kwezinto zokusetshenziswa ze-TPU eziguquliwe.
- Izimpahla Zabathengi Nezicathulo: Izithende zezicathulo zezemidlalo, amakesi okuvikela ifoni, izesekeli zemithwalo, amabhande anwebekayo, asebenzisa ukuqina okuphezulu kanye nokumelana nokuguguleka kwe-polyester TPU.
- Izidingo Zezokwelapha Nezansuku Zonke: Ama-catheter ezokwelapha, imishini yokuzivikela, izesekeli zezinga lokudla, ukusebenzisa izinto zokusetshenziswa ze-polyether TPU eziphephile ekudleni kanye nezingamelani ne-hydrolysis.
- Ukukhiqiza Kwezimboni: Ama-gasket angagugi, amabhande okuhambisa, amapayipi e-hydraulic, amafilimu okunamathela, asebenzisa ngokugcwele amandla aphezulu kanye nokuqina kwamakhemikhali kwezinto zokusetshenziswa ze-TPU.
- Imboni Entsha Yamandla Neye-elekthronikhi: Amafilimu avikela ibhethri, izesekeli zebhodi lesifunda eziguquguqukayo, izingxenye zokuvikela ezivimbela ilangabi, kusetshenziswa izinto zokusetshenziswa ze-TPU ezivikelwe ilangabi kanye nezivikelwe kakhulu.
7. Umkhuba Wokuthuthukiswa Kwezinto Zokusetshenziswa Kwe-TPU
Ngokuthuthukiswa kokukhiqiza kwezimboni kanye nokuthuthukiswa kwezidingo zokuvikela imvelo, izinto zokusetshenziswa ze-TPU ziyathuthuka ziye ekusebenzeni okuphezulu, ukuvikelwa kwemvelo kanye nokwenza ngokwezifiso. Imboni izibophezele ekucwaningeni nasekuthuthukiseni izinto zokusetshenziswa ze-polyol ezisekelwe ku-bio ukuze zithathe indawo yezinto zokusetshenziswa zendabuko ezisekelwe ku-petroleum, zinciphise ukukhishwa kwekhabhoni. Ngesikhathi esifanayo, ukumelana nesimo sezulu okuphezulu, ukubambezeleka komlilo okuphezulu, ukucaca okuphezulu kanye nezinto zokusetshenziswa ezikhethekile ze-TPU ezingamelani nokushisa okuphansi kakhulu zihlala zihlaziywa ukuze kuhlangatshezwane nezidingo zokusebenza eziqinile zamandla amasha, izindiza, ezokwelapha eziphezulu kanye neminye imikhakha esanda kuvela. Ngaphezu kwalokho, izinto zokusetshenziswa ze-TPU eziphinde zisetshenziswe futhi ezibolayo sezibe yindlela ebalulekile yocwaningo, zikhuthaza intuthuko esimeme yemboni ye-TPU.
Isikhathi sokuthunyelwe: Juni-15-2026