Amashubhu akhululekile e-fiber optical ayisakhiwo esibalulekile esivikela imicu ekucindezelekeni kwangaphandle futhi siqinisekise ukusebenza okuzinzile kokudlulisela. Ukukhethwa kwezinto kunquma ngqo ukuthembeka komshini kanye nokuphila kwenkonzo yamakhebula optical.
Kungani i-PBT ikhethwa
I-Polybutylene terephthalate (PBT)ine-modulus ejwayelekile yokunwebeka engaba ngu-2–3 GPa, ephakeme kuneye-PA12 (polyamide 12), engaba ngu-1.2–1.8 GPa. Lokhu kusho ukuguquguquka okuphansi ngaphansi komthwalo ofanayo kanye nokumelana okungcono nokucindezelwa kwe-lateral.
I-coefficient yayo yokwanda kokushisa okuqondile cishe ingama-(6–10) × 10⁻⁵ /°C, okunikeza ukuzinza okuhle kakhulu kobukhulu, okusiza ukulawula ubude obedlulele befayibha futhi kunciphisa izingozi zokugoba kwe-microbe ngaphansi kokushintsha kwezinga lokushisa.
Ngaphezu kwalokho, ukumuncwa komswakama okuphansi, ukumelana okuhle kwamakhemikhali, kanye nezindleko ezilinganiselwe kwenza i-PBT ibe enye yezinto ezisetshenziswa kakhulu ekusetshenzisweni kwamapayipi akhululekile.
Kufanele kuqashelwe ukuthi i-PBT iyi-polymer e-semi-crystalline, futhi ukwakheka kwayo kuncike kakhulu ezimweni zokucubungula i-extrusion. Ukulawulwa kwenqubo efanele kubalulekile ekufezeni ukusebenza okuzinzile.
Amapharamitha Okulawula Okuyinhloko Amathathu
Ukuqina kokusebenza kwamashubhu akhululekile kuncike ekulawulweni okuqinile kwamapharamitha amathathu abalulekile, ngalinye lithinta ngqo ukusebenza kwekhebula lesikhathi eside:
Inkomba Yokugeleza Kokuncibilika (i-MFI):
Ibonisa ukugeleza kokukhipha. Ku-PBT yezinga leshubhu elikhululekile, ivame ukulawulwa ku-7.0–15.0 g/10 min. Kumele ihambisane kahle nemishini yokucubungula; ngaphandle kwalokho, ikhwalithi yokwakheka kweshubhu ingathinteka.
Ukuncipha:
Ukuziphatha kokuncipha kokushisa kuthinta ukusatshalaliswa kobude obedlulele befayibha ngaphakathi kwepayipi, okuthonya ukulahlekelwa yi-microbending kanye nokusebenza kwezinga lokushisa eliphansi. Kuyisici esibalulekile sokudluliselwa okuzinzile kwe-optical.
Ukumelana Nokuguga Kwamanzi Ashisayo:
Izibopho ze-Ester kumaketanga e-molecular e-PBT zingase zidlule ku-hydrolysis ngaphansi kokushisa okuphezulu kanye nomswakama ophezulu, okuholela ekuwohlokeni kokusebenza. Ukuguga okusheshayo kusetshenziswa ukuhlolwa kwemithambo yokucindezela, ukuhlola i-intrinsic viscosity kanye nokugcinwa kwempahla yemishini, kuvame ukusetshenziselwa ukuhlola ukuthembeka kwesikhathi eside. Lesi futhi esinye sezizathu ezenza i-PBT isetshenziswe kabanzi ezintanjeni ze-optical ezingaphansi komhlaba kanye nezindawo eziqinile.
Izinto Ezihlukile kanye Nokuguqulwa Kwezicelo Ezikhethekile
Akuzona zonke izinhlelo zokusebenza ezifanele i-PBT emsulwa. Kuye ngezidingo zemvelo, izinto ezihlukile kanye nobuchwepheshe bokuguqula kusetshenziswa njengezinto ezihambisanayo:
I-PP (i-Polypropylene):
I-PP inikeza ukumelana okungcono kwe-hydrolysis kanye nokuguquguquka okuhle. Kodwa-ke, ngenxa ye-polarity yayo ephansi, ukuhambisana nezinhlanganisela zokugcwalisa kuncike ezinhlelweni ezithile zokwakheka futhi kumele kuhlolwe ngokucophelela.
I-PA12 (i-Polyamide 12):
I-PA12 yayisetshenziswa ekwakhiweni kwamashubhu akhululekile okuqala, kodwa ngenxa ye-modulus yayo ephansi kanye nezindleko eziphakeme, ithathelwe indawo kakhulu ezisetshenzisweni ezivamile. Manje isetshenziswa kakhulu ezisetshenzisweni ezikhethekile ezidinga ukuguquguquka okuphezulu.
Izindlela Zokuguqula:
Ukuthuthukiswa okuvame kakhulu ekusebenzeni okulwa nokugoba kuvela ekuxubeni i-PBT ne-TPEE (Thermoplastic Polyester Elastomer). Isakhiwo sesigaba esiqinile/esithambile sithuthukisa ukumelana nokugoba okuphindaphindiwe, sihlangabezana nezidingo zokuxhuma ikhebula kanye nomzila oguquguqukayo.
Ngaphezu kwalokho, izinhlelo zokuxuba ze-PET/PBT nazo ziyahlolwa ukuze kulinganiswe ukusebenza kanye nezindleko.
Izidingo Eziyinhloko Zokusebenza Kwama-Filling Compounds (i-Cable Jelly)
Inhlanganisela yokugcwalisa ngaphakathi kwepayipi iyindawo evikelayo ebalulekile yemicu ye-optical, futhi ukusebenza kwayo kuhlolwa kakhulu yilokhu okulandelayo:
I-Thixotropy:
Isebenza njengoketshezi olune-viscosity ephansi ngaphansi kokucindezeleka kokunqunywa ukuze kube lula ukugcwalisa, bese ibuyela ngokushesha esimweni sejeli uma ingashintshi, ihlinzeka ngokuqina kwesikhathi eside kanye nokuvikelwa komshini kwemicu.
Ukuvela Kwe-Hydrogen (Izinga Lokukhiqizwa Kwe-Hydrogen):
Ukungena kwe-hydrogen kuma-optical fibers kwandisa ukulahleka kokudluliselwa. Ngakho-ke, ama-compounds okugcwalisa kumele abonise ukukhiqizwa kwe-hydrogen okuphansi kakhulu. Imikhiqizo ephezulu ingafaka ama-hydrogen scavengers ukuze kuncishiswe ingozi.
Ukuhlanzeka Nokuhambisana:
Inhlanganisela kumele ifane, ingabi nokungcola kanye nama-bubble omoya, futhi ihambisane namakhemikhali nezinto zokugqoka zefayibha nezinto zamashubhu ukuze kugwenywe ukuwohloka noma imiphumela yokusebenzisana.
Kusukela ekulawulweni kwe-crystallization kwe-PBT, kuya ekwenzeni ngcono ubuchwepheshe bokuguqulwa, futhi ekugcineni kuya ekusebenzeni kahle kwe-compound, isinyathelo ngasinye kumele silawulwe ngokunembile ukuqinisekisa ukudluliselwa okuzinzile kwesikhathi eside kwe-optical futhi kuhlinzeke ngesisekelo esithembekile samanethiwekhi okuxhumana.
Isikhathi sokuthunyelwe: Meyi-28-2026