(1)Cov Khoom Siv Rwb Thaiv Tsev Uas Muaj Halogen Polyethylene (XLPE) Uas Txuas Nrog Kev Pa Luam Yeeb Tsawg:
Cov khoom siv rwb thaiv tsev XLPE yog tsim los ntawm kev sib xyaw polyethylene (PE) thiab ethylene vinyl acetate (EVA) ua lub hauv paus matrix, nrog rau ntau yam khoom ntxiv xws li halogen-free flame retardants, roj nplua nyeem, antioxidants, thiab lwm yam, los ntawm kev sib xyaw thiab pelletizing txheej txheem. Tom qab irradiation ua tiav, PE hloov pauv los ntawm cov qauv molecular linear mus rau hauv cov qauv peb-seem, hloov los ntawm cov khoom siv thermoplastic mus rau cov yas thermosetting insoluble.
Cov cables XLPE rwb thaiv tsev muaj ntau qhov zoo dua li cov thermoplastic PE ib txwm muaj:
1. Txhim kho kev tiv thaiv rau kev hloov pauv thermal, txhim kho cov khoom siv kho tshuab ntawm qhov kub siab, thiab txhim kho kev tiv thaiv rau kev tawg ntawm kev ntxhov siab ib puag ncig thiab kev laus thermal.
2. Txhim kho kev ruaj khov ntawm cov tshuaj lom neeg thiab kev tiv taus cov kuab tshuaj, txo cov dej txias, thiab tswj cov khoom hluav taws xob. Qhov kub ua haujlwm ntev tuaj yeem ncav cuag 125 ° C txog 150 ° C. Tom qab ua tiav kev sib txuas, qhov kub luv luv ntawm PE tuaj yeem nce mus txog 250 ° C, uas ua rau muaj peev xwm nqa tam sim no ntau dua rau cov cables ntawm tib tuab.
3. Cov xov hlau XLPE-insulated kuj muaj cov yam ntxwv zoo heev ntawm kev siv tshuab, tiv taus dej, thiab tiv taus hluav taws xob, ua rau lawv haum rau ntau yam kev siv, xws li cov xov hlau sab hauv hauv cov khoom siv hluav taws xob, cov xov hlau tsav tsheb, cov xov hlau teeb pom kev zoo, cov xov hlau tswj lub teeb liab qis-voltage hauv tsheb, cov xov hlau locomotive, cov xov hlau hauv av, cov xov hlau khawb av uas tsis ua rau ib puag ncig puas tsuaj, cov xov hlau nkoj, cov xov hlau qib 1E rau cov chaw tsim hluav taws xob nuclear, cov xov hlau twj tso kua mis hauv qab, thiab cov xov hlau xa hluav taws xob.
Cov lus qhia tam sim no hauv kev tsim cov khoom siv rwb thaiv tsev XLPE suav nrog cov khoom siv rwb thaiv tsev PE fais fab cable irradiation, cov khoom siv rwb thaiv tsev PE cua irradiation, thiab cov khoom siv rwb thaiv tsev polyolefin sheathing uas tsis muaj nplaim taws.
(2)Cov Khoom Siv Rwb Thaiv Kev Sib Txuas Polypropylene (XL-PP):
Polypropylene (PP), ua ib hom yas uas siv ntau, muaj cov yam ntxwv xws li lub teeb yuag, muaj ntau yam khoom siv raw, tsis kim, tiv taus tshuaj lom neeg zoo heev, yooj yim pwm, thiab rov ua dua tshiab. Txawm li cas los xij, nws muaj cov kev txwv xws li lub zog qis, tsis tiv taus cua sov, tsis muaj zog deformation, tsis tiv taus creep, tsis kub brittleness, thiab tsis tiv taus cua sov thiab oxygen laus. Cov kev txwv no tau txwv nws siv hauv kev siv cable. Cov kws tshawb fawb tau ua haujlwm los hloov kho cov ntaub ntawv polypropylene kom txhim kho lawv cov kev ua tau zoo, thiab irradiation cross-linked modified polypropylene (XL-PP) tau kov yeej cov kev txwv no zoo.
Cov xov hlau XL-PP uas muaj rwb thaiv tsev tuaj yeem ua tau raws li UL VW-1 qhov kev sim nplaim taws thiab UL-rated 150 ° C cov qauv xov hlau. Hauv kev siv cable, EVA feem ntau sib xyaw nrog PE, PVC, PP, thiab lwm yam khoom siv los kho qhov kev ua tau zoo ntawm cov txheej rwb thaiv tsev cable.
Ib qho ntawm qhov tsis zoo ntawm kev siv irradiation cross-linked PP yog tias nws cuam tshuam nrog kev sib tw ntawm kev tsim cov pab pawg kawg tsis muaj kev sib xyaw los ntawm kev puas tsuaj thiab kev sib txuas ntawm cov tshuaj molecules thiab cov tshuaj dawb loj. Kev tshawb fawb tau qhia tias qhov piv ntawm kev puas tsuaj rau kev sib txuas ntawm cov tshuaj hauv PP irradiation cross-linking yog kwv yees li 0.8 thaum siv gamma-ray irradiation. Txhawm rau kom ua tiav cov tshuaj sib txuas zoo hauv PP, cov neeg txhawb nqa cross-linking yuav tsum tau ntxiv rau kev siv irradiation cross-linking. Tsis tas li ntawd, qhov tuab ntawm kev sib txuas zoo raug txwv los ntawm kev nkag mus ntawm cov hluav taws xob thaum lub sijhawm irradiation. Irradiation ua rau muaj roj thiab ua npuas dej, uas yog qhov zoo rau kev sib txuas ntawm cov khoom nyias tab sis txwv kev siv cov xov hlau tuab.
(3) Cov Khoom Siv Rwb Thaiv Kev Sib Txuas Ethylene-Vinyl Acetate Copolymer (XL-EVA):
Raws li qhov kev thov rau kev nyab xeeb ntawm cable nce ntxiv, kev txhim kho ntawm cov cables cross-linked uas tsis muaj halogen-free flame-retardant tau loj hlob sai. Piv rau PE, EVA, uas qhia txog vinyl acetate monomers rau hauv cov saw molecular, muaj qhov crystallinity qis dua, ua rau muaj kev ywj pheej zoo dua, kev tiv thaiv kev cuam tshuam, kev sib raug zoo ntawm cov khoom sau, thiab cov khoom kaw cua sov. Feem ntau, cov khoom ntawm EVA resin nyob ntawm cov ntsiab lus ntawm vinyl acetate monomers hauv cov saw molecular. Cov ntsiab lus vinyl acetate siab dua ua rau muaj kev pom tseeb, kev ywj pheej, thiab kev tawv. EVA resin muaj kev sib raug zoo ntawm cov khoom sau zoo heev thiab kev sib txuas, ua rau nws nrov dua hauv cov cables cross-linked uas tsis muaj halogen-free flame-retardant.
Cov tshuaj EVA uas muaj cov vinyl acetate li ntawm 12% txog 24% feem ntau siv rau hauv kev rwb thaiv tsev hlau thiab cable. Hauv kev siv cable tiag tiag, EVA feem ntau sib xyaw nrog PE, PVC, PP, thiab lwm yam khoom siv los kho qhov ua tau zoo ntawm cov txheej rwb thaiv tsev cable. Cov khoom EVA tuaj yeem txhawb kev sib txuas, txhim kho kev ua tau zoo ntawm cable tom qab kev sib txuas.
(4) Cov Khoom Siv Rwb Thaiv Ethylene-Propylene-Diene Monomer (XL-EPDM) Uas Txuas Nrog:
XL-EPDM yog ib qho terpolymer uas muaj ethylene, propylene, thiab non-conjugated diene monomers, sib txuas los ntawm kev irradiation. Cov xov hlau XL-EPDM muab cov txiaj ntsig ntawm cov xov hlau polyolefin-insulated thiab cov xov hlau roj hmab-insulated:
1. Kev ywj pheej, kev ua siab ntev, tsis lo rau qhov kub thiab txias, tiv taus kev laus mus sij hawm ntev, thiab tiv taus huab cua hnyav (-60 ° C txog 125 ° C).
2. Tiv thaiv ozone, tiv thaiv UV, kev ua haujlwm rwb thaiv hluav taws xob, thiab tiv thaiv kev xeb ntawm cov tshuaj lom neeg.
3. Kev tiv taus roj thiab cov kuab tshuaj zoo ib yam li cov roj hmab chloroprene uas siv dav dav. Nws tuaj yeem tsim los ntawm kev siv cov khoom siv extrusion kub, ua rau nws pheej yig.
Cov xov hlau XL-EPDM-insulated muaj ntau yam kev siv, suav nrog tab sis tsis txwv rau cov xov hlau fais fab qis, cov xov hlau nkoj, cov xov hlau hluav taws xob hauv tsheb, cov xov hlau tswj rau cov tshuab cua txias, cov xov hlau txawb hauv kev khawb av, cov khoom siv drilling, thiab cov khoom siv kho mob.
Qhov tsis zoo ntawm XL-EPDM cables suav nrog kev tsis kam tsim kua muag thiab cov khoom nplaum thiab cov khoom nplaum tsis muaj zog, uas tuaj yeem cuam tshuam rau kev ua tiav tom qab.
(5) Cov Khoom Siv Rwb Thaiv Silicone Roj Hmab
Cov roj hmab silicone muaj kev ywj pheej thiab tiv taus ozone, corona discharge, thiab nplaim taws zoo heev, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev rwb thaiv hluav taws xob. Nws daim ntawv thov tseem ceeb hauv kev lag luam hluav taws xob yog rau cov xov hlau thiab cov cables. Cov xov hlau thiab cov cables roj hmab silicone yog qhov tshwj xeeb tshaj yog rau kev siv hauv qhov kub thiab txias thiab qhov chaw nyuaj, nrog rau lub neej ntev dua piv rau cov cables txheem. Cov ntawv thov feem ntau suav nrog cov cav kub thiab txias, transformers, generators, cov khoom siv hluav taws xob thiab hluav taws xob, cov cables hluav taws xob hauv cov tsheb thauj mus los, thiab cov cables fais fab thiab tswj hwm hauv dej hiav txwv.
Tam sim no, cov xov hlau uas muaj roj hmab silicone feem ntau raug txuas nrog los ntawm kev siv cua sov nrog cua kub lossis cov pa kub siab. Kuj tseem muaj kev tshawb fawb txog kev siv hluav taws xob electron beam irradiation rau kev txuas silicone roj hmab, txawm hais tias nws tseem tsis tau muaj nyob hauv kev lag luam cable. Nrog rau kev nce qib tsis ntev los no hauv kev siv tshuab irradiation cross-linking, nws muab cov nqi qis dua, ua haujlwm tau zoo dua, thiab zoo rau ib puag ncig rau cov ntaub ntawv rwb thaiv tsev roj hmab silicone. Los ntawm kev siv hluav taws xob electron beam irradiation lossis lwm yam khoom siv hluav taws xob, kev txuas hluav taws xob silicone roj hmab rwb thaiv tsev tuaj yeem ua tiav thaum tswj tau qhov tob thiab qib ntawm kev txuas kom ua tau raws li cov kev xav tau tshwj xeeb.
Yog li ntawd, kev siv cov thev naus laus zis irradiation cross-linking rau cov khoom siv roj hmab silicone rwb thaiv tsev muaj kev cia siab tseem ceeb hauv kev lag luam hlau thiab cable. Cov thev naus laus zis no xav tias yuav txo cov nqi tsim khoom, txhim kho kev ua haujlwm zoo, thiab pab txo cov kev cuam tshuam tsis zoo rau ib puag ncig. Kev tshawb fawb thiab kev txhim kho yav tom ntej yuav tsav tsheb ntxiv kev siv cov thev naus laus zis irradiation cross-linking rau cov khoom siv roj hmab silicone rwb thaiv tsev, ua rau lawv siv tau dav dua rau kev tsim cov xov hlau kub thiab ua haujlwm siab hauv kev lag luam hluav taws xob. Qhov no yuav muab cov kev daws teeb meem txhim khu kev qha thiab ruaj khov rau ntau qhov chaw siv.
Lub sijhawm tshaj tawm: Cuaj hlis-28-2023