(1)Izinto Zokufaka Ukushisa Eziphansi Ezixhumene Nomusi Ophansi Ongenawo I-Polyethylene (XLPE):
Izinto zokufakelwa kwe-XLPE zikhiqizwa yi-polyethylene ehlanganisiwe (PE) kanye ne-ethylene vinyl acetate (EVA) njengesisekelo se-matrix, kanye nezinye izithasiselo ezahlukahlukene ezifana nezithiyo zomlilo ezingenayo i-halogen, izinto zokugcoba, ama-antioxidants, njll., ngenqubo yokuhlanganiswa kanye ne-pelletizing. Ngemva kokucubungula imisebe, i-PE iguquka isuke esakhiweni sama-molecule esiqondile iye esakhiweni esinezinhlangothi ezintathu, ishintshe isuke ezintweni ze-thermoplastic iye kwi-thermosetting enganyibiliki.
Izintambo zokufaka i-XLPE zinezinzuzo eziningana uma kuqhathaniswa ne-PE evamile ye-thermoplastic:
1. Ukumelana okuthuthukisiwe nokuguquguquka kokushisa, izakhiwo zemishini ezithuthukisiwe emazingeni okushisa aphezulu, kanye nokumelana okuthuthukisiwe nokuqhekeka kokucindezeleka kwemvelo kanye nokuguga kokushisa.
2. Ukuqina kwamakhemikhali okuthuthukisiwe kanye nokumelana nesinyibilikisi, ukugeleza okubandayo okuncishisiwe, kanye nezakhiwo zikagesi ezigcinwe. Amazinga okushisa okusebenza kwesikhathi eside angafinyelela ku-125°C kuya ku-150°C. Ngemva kokucubungula ukuxhumanisa, izinga lokushisa le-PE le-short-circuit lingakhushulwa lifike ku-250°C, okuvumela amandla okuphatha ugesi aphezulu kakhulu ezintanjeni ezinobukhulu obufanayo.
3. Izintambo ezifakwe i-XLPE ziphinde zibe nezakhiwo ezinhle kakhulu zomshini, ezingangeni manzi, kanye nezingamelani nemisebe, okwenza zifanelekele izinhlelo zokusebenza ezahlukahlukene, njengokuxhuma kwangaphakathi ezintweni zikagesi, izintambo zemoto, izintambo zokukhanyisa, izintambo zokulawula isignali yezimoto ezisebenzisa amandla aphansi, izintambo zesitimela, izintambo zesitimela esingaphansi komhlaba, izintambo zokumba ezinobungani nemvelo, izintambo zemikhumbi, izintambo ze-1E zezitshalo zamandla enuzi, izintambo zepompo ezicwiliswa emanzini, kanye nezintambo zokudlulisa amandla.
Iziqondiso zamanje zokuthuthukiswa kwezinto zokufakelwa kwe-XLPE zifaka phakathi izinto zokufakelwa kwekhebula lamandla le-PE ezixhunywe ngemisebe, izinto zokufakelwa kwe-PE ezixhunywe ngemisebe, kanye nezinto zokufakelwa kwe-polyolefin ezixhunywe ngemisebe.
(2)Izinto Zokufaka Ukushisa Ezihlanganisiwe Ze-Polypropylene (XL-PP):
I-Polypropylene (PP), njengepulasitiki evamile, inezici ezifana nesisindo esincane, imithombo eminingi yezinto zokusetshenziswa, ukusebenza kahle kwezindleko, ukumelana nokugqwala kwamakhemikhali okuhle kakhulu, ukulula kokubumba, kanye nokuphinde kusetshenziswe. Kodwa-ke, inemikhawulo efana namandla aphansi, ukumelana nokushisa okubi, ukuguquguquka okukhulu kokuncipha, ukumelana nokuqhekeka okubi, ukuphuka kwezinga lokushisa eliphansi, kanye nokumelana nokuguga kokushisa nomoya-mpilo. Le mikhawulo inciphise ukusetshenziswa kwayo ekusetshenzisweni kwekhebula. Abacwaningi bebesebenza ukushintsha izinto ze-polypropylene ukuze bathuthukise ukusebenza kwazo konke, kanye nokushiswa kwemisebe i-cross-linked modified polypropylene (XL-PP) inqobe ngempumelelo le mikhawulo.
Izintambo ezifakwe ugesi ze-XL-PP zingahlangabezana nokuhlolwa komlilo we-UL VW-1 kanye nezindinganiso zezintambo ze-UL ezilinganiselwe yi-150°C. Ezisetshenzisweni zekhebula ezisebenzayo, i-EVA ivame ukuhlanganiswa ne-PE, i-PVC, i-PP, nezinye izinto ukuze kulungiswe ukusebenza kwesendlalelo sokufakwa kogesi kwekhebula.
Enye yezinto ezimbi ze-PP exhunywe ngemisebe ukuthi ihilela ukusabela okuncintisanayo phakathi kokwakhiwa kwamaqembu okugcina angagcwalisiwe ngokusebenzisa ukusabela kokuwohloka kanye nokusabela kokuxhumanisa phakathi kwama-molecule ashukunyisiwe kanye nama-free radical amakhulu ama-molecule. Izifundo zibonise ukuthi isilinganiso sokuwohloka kokusabela kokuxhumanisa ku-PP irradiation cross-linking cishe singu-0.8 uma kusetshenziswa i-gamma-ray irradiation. Ukuze kufezwe ukusabela kokuxhumanisa okuphumelelayo ku-PP, ama-cross-linking promoters kudingeka engezwe ukuze kuxhunywe ngemisebe. Ngaphezu kwalokho, ubukhulu bokuxhumanisa obusebenzayo bunqunyelwe amandla okungena kwemisebe yama-electron ngesikhathi sokukhanya. Ukukhanya kuholela ekukhiqizweni kwegesi kanye ne-foam, okuzuzisa ukuxhumanisa imikhiqizo emincane kodwa kunciphisa ukusetshenziswa kwezintambo eziqinile.
(3) Izinto Zokuvimbela I-Cross-Linked Ethylene-Vinyl Acetate Copolymer (XL-EVA):
Njengoba isidingo sokuphepha kwekhebula sanda, ukuthuthukiswa kwezintambo ezixhumene ne-cross-linked ezingenalo i-halogen-flame-retardant kuye kwanda ngokushesha. Uma kuqhathaniswa ne-PE, i-EVA, eyethula ama-monomer e-vinyl acetate ku-molecule chain, ine-crystallinity ephansi, okuholela ekuguquguqukeni okuthuthukisiwe, ukumelana nomthelela, ukuhambisana kokugcwalisa, kanye nezakhiwo zokuvala ukushisa. Ngokuvamile, izakhiwo ze-resin ye-EVA zincike kokuqukethwe kwama-monomer e-vinyl acetate ku-molecule chain. Okuqukethwe okuphezulu kwe-vinyl acetate kuholela ekwandeni kokucaca, ukuguquguquka, kanye nokuqina. I-resin ye-EVA inokuhambisana okuhle kakhulu kokugcwalisa kanye nokuxhumanisa, okwenza ithandwe kakhulu ezintanjeni ezixhumene ne-cross-linked ezingenalo i-halogen-flame-retardant.
I-resin ye-EVA enokuqukethwe kwe-vinyl acetate okungaba ngu-12% kuya ku-24% ivame ukusetshenziswa ekufakweni kwentambo kanye nekhebula. Ezisetshenzisweni zangempela zekhebula, i-EVA ivame ukuhlanganiswa ne-PE, i-PVC, i-PP, nezinye izinto ukuze kulungiswe ukusebenza kwengqimba yokufakwa kwekhebula. Izingxenye ze-EVA zingakhuthaza ukuxhumanisa, zithuthukise ukusebenza kwekhebula ngemva kokuxhumanisa.
(4) Izinto Zokuvikela Ezixhumene Ne-Ethylene-Propylene-Diene Monomer (XL-EPDM):
I-XL-EPDM iyi-terpolymer eyakhiwe yi-ethylene, i-propylene, kanye nama-non-conjugated diene monomers, axhunywe ngemisebe. Izintambo ze-XL-EPDM zihlanganisa izinzuzo zezintambo ezifakwe i-polyolefin kanye nezintambo ezivamile ezifakwe i-raber:
1. Ukuguquguquka, ukuqina, ukunganamatheli emazingeni okushisa aphezulu, ukumelana nokuguga isikhathi eside, kanye nokumelana nezimo zezulu ezinzima (-60°C kuya ku-125°C).
2. Ukumelana ne-ozone, ukumelana ne-UV, ukusebenza kokushisa kukagesi, kanye nokumelana nokugqwala kwamakhemikhali.
3. Ukumelana namafutha kanye nezinyibilikisi okufana nokufakwa kwerabha ye-chloroprene okujwayelekile. Kungakhiqizwa kusetshenziswa imishini yokucubungula i-hot extrusion evamile, okwenza kube lula ukuyisebenzisa.
Izintambo ezifakwe i-XL-EPDM zinobubanzi bezinhlelo zokusebenza, okuhlanganisa kodwa kungagcini ngezintambo zikagesi ezisebenzisa amandla aphansi, izintambo zemikhumbi, izintambo zokuthungela izimoto, izintambo zokulawula zama-compressor eziqandisini, izintambo eziphathwayo zokumba, imishini yokubhoboza, kanye namadivayisi ezokwelapha.
Izinkinga ezinkulu zezintambo ze-XL-EPDM zifaka phakathi ukumelana nokuklebhuka okungekuhle kanye nezakhiwo zokunamathela ezibuthakathaka kanye nokuzinamathela, okungathinta ukucutshungulwa okulandelayo.
(5) Izinto Zokuvikela Irabha Yesilikhoni
Irabha ye-silicone inokuguquguquka kanye nokumelana okuhle kakhulu ne-ozone, ukukhishwa kwe-corona, kanye namalangabi, okwenza ibe yinto efanelekile yokuvikela ugesi. Ukusetshenziswa kwayo okuyinhloko embonini kagesi kwenzelwa izintambo nezintambo. Izintambo nezintambo zerabha ye-silicone zifaneleka kakhulu ukusetshenziswa ezindaweni ezishisa kakhulu nezidinga kakhulu, ezinokuphila isikhathi eside kakhulu uma kuqhathaniswa nezintambo ezijwayelekile. Izinhlelo ezivamile zifaka phakathi ama-motor ashisa kakhulu, ama-transformer, ama-generator, imishini kagesi kanye nekagesi, izintambo zokuthungela ezimotweni zokuthutha, kanye nezintambo zamandla nokulawula zasemanzini.
Njengamanje, izintambo ezifakwe irabha ye-silicone ngokuvamile zixhunyaniswe ngokusebenzisa ingcindezi yomoya nomoya oshisayo noma umusi ocindezelwe kakhulu. Kukhona nocwaningo oluqhubekayo mayelana nokusebenzisa i-electron beam irrab ye-silicone exhumanisayo, yize ingakavamile embonini yekhebula. Ngokuthuthuka kwamuva nje kobuchwepheshe be-cross-linking irrab, inikeza enye indlela engabizi kakhulu, esebenza kahle, futhi enobungani nemvelo yezinto zokuvikela irabha ye-silicone. Ngokusebenzisa i-electron beam irrab noma eminye imithombo yemisebe, ukuxhumanisa okuphumelelayo kwe-silicone rubber insulation kungafinyelelwa ngenkathi kuvumela ukulawula ukujula kanye nezinga lokuxhumanisa ukuze kuhlangatshezwane nezidingo ezithile zohlelo lokusebenza.
Ngakho-ke, ukusetshenziswa kobuchwepheshe bokuxhumanisa ngemisebe ezintweni zokufakelwa irabha ye-silicone kunesithembiso esikhulu embonini yezintambo nezintambo. Lobu buchwepheshe kulindeleke ukuthi bunciphise izindleko zokukhiqiza, buthuthukise ukusebenza kahle kokukhiqiza, futhi bufake isandla ekunciphiseni imiphumela emibi emvelweni. Ucwaningo lwesikhathi esizayo kanye nemizamo yokuthuthukisa ingase iqhubekisele phambili ukusetshenziswa kobuchwepheshe bokuxhumanisa ngemisebe ezintweni zokufakelwa irabha ye-silicone, okwenza zisebenze kabanzi ekukhiqizeni izintambo nezintambo ezishisa kakhulu, ezisebenza kahle kakhulu embonini kagesi. Lokhu kuzohlinzeka ngezixazululo ezithembekile nezihlala isikhathi eside ezindaweni ezahlukene zokusetshenziswa.
Isikhathi sokuthunyelwe: Septhemba-28-2023