Iityhubhu ezikhululekileyo zefayibha ye-optical zizinto eziphambili ezikhusela iifayibha kuxinzelelo lwangaphandle kwaye ziqinisekisa ukusebenza okuzinzileyo kothumelo. Ukukhethwa kwezinto kumisela ngokuthe ngqo ukuthembeka koomatshini kunye nobomi benkonzo yeentambo ze-optical.
Kutheni i-PBT ikhethwa
I-Polybutylene terephthalate (PBT)ine-modulus eqhelekileyo ye-elastic emalunga ne-2–3 GPa, ephezulu kuneye-PA12 (polyamide 12), emalunga ne-1.2–1.8 GPa. Oku kuthetha ukuba i-deformation ephantsi phantsi komthwalo ofanayo kunye nokumelana okungcono nokucinezelwa ecaleni.
I-coefficient yayo yokwandiswa kobushushu obuthe tye imalunga ne-(6–10) × 10⁻⁵ /°C, inika uzinzo oluhle kakhulu, olunceda ukulawula ubude obugqithisileyo befayibha kwaye lunciphise umngcipheko wokugoba kwe-microbend phantsi kokutshintsha kobushushu.
Ukongeza, ukufunxwa komswakama okuphantsi, ukumelana kakuhle kweekhemikhali, kunye nexabiso eliphakathi kwenza i-PBT ibe yenye yezona zinto ziphambili zokusetyenziswa kweetyhubhu ezikhululekileyo.
Kufuneka kuqatshelwe ukuba i-PBT yi-semi-crystalline polymer, kwaye ubukrelekrele bayo buxhomekeke kakhulu kwiimeko zokucubungula i-extrusion. Ulawulo olufanelekileyo lwenkqubo lubalulekile ekufezekiseni ukusebenza okuzinzileyo.
IiParamitha zoLawulo oluPhambili ezintathu
Uzinzo lokusebenza kweetyhubhu ezikhululekileyo luxhomekeke kulawulo olungqongqo lweeparameter ezintathu eziphambili, nganye ichaphazela ngokuthe ngqo ukusebenza kwekhebula ixesha elide:
Isalathisi sokuhamba kweNtlanzi (i-MFI):
Ibonakalisa ukuhambahamba kwe-extrusion. Kwi-PBT ekhululekileyo ye-tube-grade, idla ngokulawulwa kwi-7.0–15.0 g/10 min. Kufuneka ihambelane kakuhle nezixhobo zokucubungula; kungenjalo, umgangatho wokwakheka kwe-tube unokuchaphazeleka.
Ukuncipha:
Ukuziphatha kokuncipha kobushushu kuchaphazela ukusasazwa kobude obugqithisileyo befayibha ngaphakathi kwityhubhu, nto leyo echaphazela ukulahleka kwe-microbending kunye nokusebenza kobushushu obuphantsi. Yinto ebalulekileyo ekudlulisweni okuzinzileyo kwe-optical.
Ukumelana nokuguga ngamanzi ashushu:
Iibhondi ze-Ester kwi-PBT molecular chains zinokungena kwi-hydrolysis phantsi kobushushu obuphezulu kunye nokufuma okuphezulu, okukhokelela ekuwohlokeni kokusebenza. Ukwaluphala okukhawulezileyo kusetyenziswa uvavanyo lwemithambo yoxinzelelo, ukuvavanya i-intrinsic viscosity kunye nokugcinwa kwepropathi yoomatshini, kudla ngokusetyenziswa ukuvavanya ukuthembeka kwexesha elide. Esi sisizathu sokuba i-PBT isetyenziswa kakhulu kwiintambo ze-optical ezingaphantsi komhlaba kunye neendawo ezirhabaxa.
Izixhobo ezizezinye kunye nohlengahlengiso lwezicelo ezikhethekileyo
Ayizizo zonke izicelo ezifanelekileyo kwi-PBT ecocekileyo. Ngokuxhomekeke kwiimfuno zokusingqongileyo, ezinye izixhobo kunye nobuchwepheshe bokuguqula ziyasetyenziswa njengezongezelelo:
I-PP (iPolypropylene):
I-PP inika ukumelana okungcono kwe-hydrolysis kunye nokuguquguquka okuhle. Nangona kunjalo, ngenxa ye-polarity yayo ephantsi, ukuhambelana neekhompawundi zokuzalisa kuxhomekeke kwiinkqubo ezithile zokwenziwa kwaye kufuneka kuhlolwe ngononophelo.
I-PA12 (iPolyamide 12):
I-PA12 yayisetyenziswa kwiindlela zokuqala zoyilo lweetyhubhu ezikhululekileyo, kodwa ngenxa yokuba i-modulus yayo iphantsi kunye neendleko eziphezulu, ithathelwe indawo kakhulu kwiindlela eziqhelekileyo. Ngoku isetyenziswa kakhulu kwiindlela ezithile ezifuna ukuguquguquka okuphezulu.
Iindlela zoLungiso:
Eyona ndlela ixhaphakileyo yokuphucula ukusebenza kwe-anti-gonding ivela ekuxubeni i-PBT ne-TPEE (Thermoplastic Polyester Elastomer). Ulwakhiwo lwe-hard-segment/soft-segment luphucula ukumelana nokugoba okuphindaphindiweyo, luhlangabezana neemfuno zokudibanisa iintambo kunye ne-dynamic routing.
Ukongeza, iinkqubo zokuxuba ze-PET/PBT nazo ziyahlolwa ukuze kulinganiswe ukusebenza kunye neendleko.
Iimfuneko eziphambili zokusebenza kweeCompounds zokuzalisa (iCable Jelly)
Ikhompawundi yokuzalisa ngaphakathi kwityhubhu yindawo yokukhusela ebalulekileyo kwiifayibha ze-optical, kwaye ukusebenza kwayo kuvavanywa kakhulu ngolu hlobo lulandelayo:
Thixotropy:
Isebenza njengolwelo olune-viscosity ephantsi xa iphantsi koxinzelelo lokucheba ukuze kube lula ukuyizalisa, ize ibuyele ngokukhawuleza kwimeko yejeli xa ingashukumi, ibonelela ngokuncamathisela ixesha elide kunye nokukhuselwa koomatshini kwimicu.
Ukuguquka kweHydrogen (Inqanaba lokuZala iHydrogen):
Ukungena kwe-hydrogen kwiifayibha ze-optical kwandisa ukulahleka kokudluliselwa. Ke ngoko, iikhompawundi zokuzalisa kufuneka zibonise ukuveliswa kwe-hydrogen okuphantsi kakhulu. Iimveliso eziphezulu zingabandakanya izinto zokususa i-hydrogen ukuze kuncitshiswe umngcipheko ngakumbi.
Ucoceko kunye nokuhambelana:
Le compound kufuneka ifane, ingabi nakungcola kunye namaqamza omoya, kwaye ihambelane neekhemikhali kunye neefayibha kunye nezinto zeetyhubhu ukuze kuthintelwe ukuwohloka okanye imiphumo yokusebenzisana.
Ukususela kulawulo lwe-crystallization ye-PBT, ukuya kuphuculo lwetekhnoloji yokuguqula, kwaye ekugqibeleni ukuya ekuzaliseni ukusebenza kwe-compound, inyathelo ngalinye kufuneka lilawulwe ngokuchanekileyo ukuqinisekisa ukuhanjiswa kwe-optical okuzinzileyo kwexesha elide kunye nokubonelela ngesiseko esithembekileyo senethiwekhi zonxibelelwano.
Ixesha leposi: Meyi-28-2026