(1)Izinto zokukhusela ezidityaniswe nomsi ophantsi ze-Zero Halogen Polyethylene (XLPE):
Izinto zokufakelwa kwe-XLPE ziveliswa yi-compound polyethylene (PE) kunye ne-ethylene vinyl acetate (EVA) njenge-base matrix, kunye nezinye izinto ezahlukeneyo ezifana ne-halogen-free flame retardants, ii-lubricants, ii-antioxidants, njl.njl., ngenkqubo yokudibanisa kunye ne-pelletizing. Emva kokucubungula i-radiation, i-PE iguquka ukusuka kwisakhiwo se-molecular esithe ngqo ukuya kwisakhiwo esinemilinganiselo emithathu, itshintsha ukusuka kwi-thermoplastic material ukuya kwi-thermosetting plastic enganyibilikiyo.
Iintambo zokufaka i-insulation ze-XLPE zineengenelo ezininzi xa kuthelekiswa ne-PE eqhelekileyo ye-thermoplastic:
1. Ukumelana okuphuculweyo nokuguqulwa kobushushu, iipropati zoomatshini eziphuculweyo kumaqondo obushushu aphezulu, kunye nokuxhathisa okuphuculweyo ukuqhekeka koxinzelelo lokusingqongileyo kunye nokuguga kobushushu.
2. Ukuqina kweekhemikhali okuphuculweyo kunye nokumelana nesinyibilikisi, ukuncipha kokuhamba komoya obandayo, kunye neempawu zombane ezigciniweyo. Amaqondo obushushu okusebenza ixesha elide anokufikelela kwi-125°C ukuya kwi-150°C. Emva kokucubungula i-cross-linking, ubushushu be-short-circuit ye-PE bunokwandiswa ukuya kwi-250°C, okuvumela amandla aphezulu kakhulu okuthwala umbane kwiintambo ezinobukhulu obufanayo.
3. Iintambo ezifakwe i-XLPE zikwabonisa iimpawu ezintle kakhulu zoomatshini, ezingangeni manzi, kunye nezingamelani nemitha, nto leyo ezenza zifaneleke kwiintlobo ngeentlobo zezicelo, ezinje ngentambo yangaphakathi kwizixhobo zombane, iintambo zemoto, iintambo zokukhanyisa, iintambo zokulawula isignali yemoto ene-voltage ephantsi, iintambo ze-locomotive, iintambo ze-subway, iintambo zemigodi ezinobuhlobo nokusingqongileyo, iintambo zenqanawa, iintambo ze-1E-grade zezityalo zamandla enyukliya, iintambo zepompo ezingaphantsi komhlaba, kunye neentambo zokuhambisa umbane.
Imiyalelo yangoku yophuhliso lwezinto zokwambathisa i-XLPE ibandakanya izixhobo zokwambathisa i-irradiation cross-linked PE power cable insulation materials, izixhobo zokwambathisa i-irradiation cross-linked PE aerial insulation materials, kunye nezixhobo zokwambathisa i-polyolefin sheathing ezidityaniswe nelangatye ezithintela umlilo.
(2)Izinto zokukhusela iPolypropylene eDibeneyo (XL-PP):
I-Polypropylene (PP), njengeplastiki eqhelekileyo, ineempawu ezinje ngobunzima obulula, imithombo emininzi yezinto ezikrwada, ukusebenza kakuhle kweendleko, ukumelana nokugqwala kweekhemikhali okugqwesileyo, ukulula kokubumba, kunye nokuphindeka kwakhona. Nangona kunjalo, inemida efana namandla aphantsi, ukumelana nobushushu obuphantsi, ukuguqulwa okubonakalayo kokuncipha, ukumelana nokuqhekeka okuphantsi, ukubuthathaka kobushushu obuphantsi, kunye nokungaxhathisi kakuhle kubushushu kunye nokuguga kweoksijini. Le mida ithintele ukusetyenziswa kwayo kwizicelo zekhebula. Abaphandi bebesebenza ukuguqula izixhobo ze-polypropylene ukuphucula ukusebenza kwazo ngokubanzi, kwaye i-irradiation cross-linked modified polypropylene (XL-PP) iye yoyisa ngempumelelo le mida.
Iingcingo ezigqunywe nge-XL-PP zinokuhlangabezana novavanyo lwelangatye lwe-UL VW-1 kunye nemigangatho yeengcingo ze-UL ezikumgangatho we-150°C. Kwiinkqubo zentambo ezisebenzayo, i-EVA idla ngokuxutywa ne-PE, i-PVC, i-PP, kunye nezinye izinto ukulungisa ukusebenza komaleko we-cable insulation.
Enye yezinto ezingalunganga nge-irradiation cross-linked PP kukuba ibandakanya impendulo yokhuphiswano phakathi kokwenziwa kwamaqela esiphelo angagcwaliyo ngokusebenzisa ii-degradation reactions kunye nee-cross-linking reactions phakathi kwee-molecules ezivuselelweyo kunye nee-free radicals ezinkulu ze-molecule. Izifundo zibonise ukuba umlinganiselo wokudilika kwii-cross-linking reactions kwi-PP irradiation cross-linking umalunga ne-0.8 xa kusetyenziswa i-gamma-ray irradiation. Ukuze kufezekiswe ii-cross-linking reactions ezisebenzayo kwi-PP, kufuneka kongezwe ii-cross-linking promoters kwi-irradiation cross-linking. Ukongeza, ubukhulu be-cross-linking obusebenzayo bunqunyelwe kukukwazi ukungena kwe-electron beams ngexesha le-irradiation. I-irradiation ikhokelela ekuvelisweni kwegesi kunye ne-foaming, eluncedo kwi-cross-linking yeemveliso ezincinci kodwa ithintela ukusetyenziswa kweentambo ezixineneyo.
(3) Izinto zokukhusela i-Cross-Linked Ethylene-Vinyl Acetate Copolymer (XL-EVA):
Njengoko imfuno yokhuseleko lweentambo isanda, uphuhliso lweentambo ezinqamlezileyo ezingenamlilo ezingena-halogen lukhule ngokukhawuleza. Xa kuthelekiswa ne-PE, i-EVA, engenisa ii-monomers ze-vinyl acetate kwi-molecular chain, ine-crystallinity ephantsi, nto leyo ebangela ukuguquguquka okuphuculweyo, ukumelana nempembelelo, ukuhambelana kwe-filler, kunye neempawu zokuvala ubushushu. Ngokubanzi, iipropati ze-resin ye-EVA zixhomekeke kumxholo wee-monomers ze-vinyl acetate kwi-molecular chain. Umxholo ophezulu we-vinyl acetate ukhokelela ekwandeni kokucaca, ukuguquguquka, kunye nokuqina. I-resin ye-EVA inokuhambelana okuhle kwe-filler kunye nokunxibelelana okunqamlezileyo, okwenza ukuba ithandwe kakhulu kwiintambo ezinqamlezileyo ezingenamlilo ezingena-halogen.
I-resin ye-EVA enomxholo we-vinyl acetate omalunga ne-12% ukuya kwi-24% isetyenziswa kakhulu kwi-wire and cable insulation. Kwizicelo ze-cable zangempela, i-EVA idla ngokuxutywa ne-PE, i-PVC, i-PP, kunye nezinye izinto ukulungisa ukusebenza komaleko we-cable insulation. Izixhobo ze-EVA zinokukhuthaza i-cross-linking, ziphucule ukusebenza kwe-cable emva kwe-cross-linking.
(4) Izinto zokukhusela i-Cross-Linked Ethylene-Propylene-Diene Monomer (XL-EPDM):
I-XL-EPDM yi-terpolymer eyenziwe yi-ethylene, i-propylene, kunye nee-non-conjugated diene monomers, ezidityaniswe ngemitha. Iintambo ze-XL-EPDM zidibanisa iingenelo zeentambo ezifakwe i-polyolefin kunye neentambo ezifakwe i-rubber ezisetyenziswa rhoqo:
1. Ukuguquguquka, ukuqina, ukunganamatheli kumaqondo obushushu aphezulu, ukumelana nokwaluphala ixesha elide, kunye nokumelana nemozulu enzima (-60°C ukuya kwi-125°C).
2. Ukumelana ne-ozone, ukumelana ne-UV, ukusebenza kobushushu bombane, kunye nokumelana nokugqwala kweekhemikhali.
3. Ukumelana neoyile kunye nezinyibilikisi ezifana nokufakelwa kwerabha ye-chloroprene esetyenziswa ngokubanzi. Ingaveliswa kusetyenziswa izixhobo zokucoca ezishushu eziqhelekileyo, nto leyo eyenza ukuba ifikeleleke ngexabiso eliphantsi.
Iintambo ezifakwe i-XL-EPDM-insulated zineendlela ezahlukeneyo zokusetyenziswa, kuquka kodwa kungaphelelanga apho kwiintambo zamandla ezisebenzisa umbane ophantsi, iintambo zeenqanawa, iintambo zokutsha kweemoto, iintambo zokulawula ii-compressor zefriji, iintambo eziphathwayo zemigodi, izixhobo zokubhola, kunye nezixhobo zonyango.
Izinto ezingalunganga kakhulu ngeentambo ze-XL-EPDM ziquka ukungakrazuli kakuhle kunye nokuncamathelisa okubuthathaka kunye neempawu zokuncamathelisa, ezinokuchaphazela ukucutshungulwa okulandelayo.
(5) Izinto zokukhusela irabha yesilicone
Irabha yesilicone inokuguquguquka okuphezulu kunye nokumelana okuhle kakhulu ne-ozone, ukukhutshwa kwe-corona, kunye namalangatye, nto leyo eyenza ukuba ibe yinto efanelekileyo yokukhusela umbane. Ukusetyenziswa kwayo okuphambili kwishishini lombane kukusebenzisa iingcingo kunye neentambo. Iingcingo kunye neentambo zerabha zesilicone zilungele kakhulu ukusetyenziswa kwiindawo ezinobushushu obuphezulu nezifuna amandla, ezinobomi obude kakhulu xa kuthelekiswa neentambo eziqhelekileyo. Izicelo eziqhelekileyo ziquka iimoto ezinobushushu obuphezulu, ii-transformers, iijenereyitha, izixhobo ze-elektroniki kunye nezombane, iintambo zokutsha kwizithuthi zothutho, kunye neengcingo zamandla kunye nolawulo lwaselwandle.
Okwangoku, iintambo ezifakwe irabha yesilicone ziqhele ukudityaniswa kusetyenziswa uxinzelelo lomoya olunomoya oshushu okanye umphunga ophantsi. Kukwakho nophando oluqhubekayo malunga nokusebenzisa i-electron beam irradiation kwirabha yesilicone edibanisa i-cross-linking, nangona ingekaxhaphaki kushishino lweentambo. Ngenkqubela phambili yakutshanje kwitekhnoloji yokudibanisa i-irradiation, inika enye indlela engabizi kakhulu, esebenza kakuhle, kwaye enobuhlobo nokusingqongileyo yezixhobo zokukhusela irabha yesilicone. Ngokusebenzisa i-electron beam irradiation okanye eminye imithombo yemitha, ukudityaniswa ngokufanelekileyo kwe-silicone rubber insulation kunokufezekiswa ngelixa kuvumela ulawulo phezu kobunzulu kunye nenqanaba lokudibanisa ukuze kuhlangatyezwane neemfuno ezithile zesicelo.
Ngenxa yoko, ukusetyenziswa kwetekhnoloji yokudibanisa imitha yezixhobo zokukhusela irabha yesilicone kunesithembiso esikhulu kushishino lweengcingo kunye neentambo. Le tekhnoloji kulindeleke ukuba inciphise iindleko zemveliso, iphucule ukusebenza kakuhle kwemveliso, kwaye inegalelo ekunciphiseni iimpembelelo ezimbi kwindalo esingqongileyo. Imizamo yophando kunye nophuhliso lwexesha elizayo inokuqhubela phambili ukusetyenziswa kwetekhnoloji yokudibanisa imitha yezixhobo zokukhusela irabha yesilicone, nto leyo eyenza ukuba zisetyenziswe ngakumbi ekwenzeni iintambo kunye neentambo ezishushu kakhulu, ezisebenza kakhulu kushishino lombane. Oku kuya kubonelela ngezisombululo ezithembekileyo nezihlala ixesha elide kwiindawo ezahlukeneyo zesicelo.
Ixesha lokuthumela: Sep-28-2023