Lub sheath lossis sab nraud tiv thaiv yog cov txheej txheem kho kom zoo nkauj, feem ntau yog ua los ntawm cov nplaim hluavtaws, thiab hluav taws xob cov ntaub ntawv tiv thaiv cov khoom siv hauv cov khoom siv tshwj xeeb.
1. Pe sheath cov khoom
PE yog cov lus luv ntawm polyethylene, uas yog cov polymer compound tsim los ntawm cov polymerization ntawm ethylene. Cov polyethylene ntaub plaub hau yog tsim los ntawm kev sib xyaw ua ke thiab granulene resin nrog stabilizer, carbon dub, antioxidant thiab plasterizer nyob rau hauv qee yam kev faib ua feem. Polyethylene ntaub ntaub rau kev kho qhov muag cable sheaths tuaj yeem faib ua cov polyethylene (LDPE) thiab siab-ntom polyethylene (HDPE) raws li ntom. Vim yog lawv cov qauv sib txawv thiab cov qauv molecular, lawv muaj cov khoom sib txawv. Tsawg-ntom polyethylene, tseem hu ua cov high-siab polyethylene, yog tsim los ntawm ethylene ntawm ethylene ntawm ethylenes ntawm kev kub siab (saum toj 1500 ° C nrog oxygen ua tshuaj tua neeg. Yog li ntawd, cov molecular chart-ceev polyethylene muaj ntau ceg ntawm cov qauv sib tw, thiab cov qauv hloov kho siab, thiab muaj peev xwm hloov tau zoo thiab elongation. High-ceev polyethylene, tseem hu ua cov roj qis qis polyethylene, yog tsim los ntawm ethylene ntawm cov kev siab siab (1-5 ethanceres (1-50 ° c tov nrog txhuas thiab titanium catalysts. Vim tias nqaim molecular hnyav faib ntawm highethylene thiab cov kev npaj cov cuab yeej siv zoo, cov tshuaj zoo thiab kub ntau yam ntawm kev siv. Nruab Nrab-Ntawj Polyethylene ntaub plaub hau yog tsim los ntawm kev sib xyaw high-ntom polyethylene nyob rau hauv ib qho kev pab pawg ua feem tsim nyog, lossis cov epylene (lossis tus lej thib 1 ntawm 1-butene). Yog li ntawd, kev ua tau zoo ntawm nruab nrab-ceev polyethylene yog nruab nrab ntawm cov polyethylene thiab cov coj qis heev ntawm cov polyethylene siab. LINEAR tsawg-ntom polyethylene yog polymerized los ntawm cov roj muaj roj qis lossis cov kev daws teeb meem nrog ethylene monomer thiab 2-atefer. Lub Ceging degree ntawm linear tsawg-ceev polyethylene yog nruab nrab ntawm qis ntom thiab siab ntom, yog li nws muaj kev nyuaj siab zoo heev tawg. Kev nyuaj siab ib puag ncig tawg tsis kam yog qhov ntsuas tau tseem ceeb heev rau kev txheeb xyuas qhov zoo ntawm PE cov khoom siv. Nws yog hais txog qhov tshwm sim uas cov khoom xeem ib txwm raug rau kev sib tsoo kev ntxhov siab tawg hauv ib puag ncig ntawm surfactant. Qhov cuam tshuam rau cov khoom siv ntxhov siab tau tawg suav nrog: molecular hnyav tawm, molecular hnyav faib, crystallinity, thiab microstructure ntawm molecular chart. Qhov loj dua cov molecular qhov hnyav, qhov nqaim lub cev hnyav, cov kev sib txuas ntau dua ntawm cov khoom siv ib puag ncig, thiab siv sijhawm ntev dua lub neej ntawm cov khoom; Nyob rau tib lub sijhawm, lub crystallization ntawm cov khoom kuj cuam tshuam rau qhov ntsuas no. Qhov qis dua lub crystallinity, qhov zoo dua ib puag ncig kev nyuaj siab tawg tsis kam ntawm cov khoom. Lub zog tensile thiab elongation ntawm so PE cov ntaub ntawv yog lwm qhov ntsuas tau ntsuas qhov ua tau zoo ntawm cov khoom siv, thiab tuaj yeem twv seb qhov kawg ntawm cov khoom siv. Cov pa roj carbon cov ntsiab lus hauv PE khoom siv yuav ua tau zoo tiv thaiv kev yaig ntawm cov khoom siv ultraviolet tuaj yeem txhim kho lub zog antioxidant ntawm cov khoom.
2. PVC cov ntaub qhwv
PVC Cov Khoom Siv Retardant cov khoom muaj cov chlorine atoms, uas yuav hlawv hauv cov nplaim taws. Thaum hlawv, nws yuav decompose thiab tso tawm ntau npaum li cas ntawm corrosive thiab lom hc roj thaum tawm hauv cov nplaim taws, yog li nws muaj cov xeeb ceem, tsis muaj cov nplaim taws tsis sib txuas; Nyob rau tib lub sijhawm, cov ntaub ntawv nyias nyias muaj cov khoom siv tau zoo thiab kev ua kom muaj zog, thiab yog siv dav hauv sab hauv kab hluav taws xob.
3. Halogen-dawb nplaim retardant hmoov ntaub soft cov khoom
Txij li thaum muaj roj ua pa roj av, uas tau muaj cov nplaim hluav taws kub, uas tsis muaj cov nplaim hluavtaws, uas tsis muaj cov nplaim hluav taws kub Tiv thaiv kev sib txuas. Txij li thaum inorganic nplaim retardants ntxiv rau Halogen-dawb nplaim retardant sheath cov ntaub ntawv, qhov kev ua haujlwm ntawm cov polymers yuav nce ntxiv. Nyob rau tib lub sijhawm, resins thiab inorganic nplaim retardants yog ob qho khoom siv sib txawv. Thaum lub sijhawm ua, nws yog ib qho tsim nyog los tiv thaiv kev sib xyaw tsis sib xyaw ntawm cov nplaim hluav taws xob hauv zos. Inorganic nplaim hluav taws retardants yuav tsum tau muab ntxiv rau cov nyiaj kom tsim nyog. Yog tias qhov sib npaug yog loj dhau, cov neeg kho tshuab zog thiab elongation ntawm cov khoom tawg ntawm cov khoom yuav tau txo qis heev. Cov ntsuas ntsuas rau cov nplaim hluav taws xob retardant cov khoom ntawm halogen-dawb nplaim taws retardants yog cov oxygen index thiab pa taws. Cov Oxygen Index yog qhov kev txiav txim siab tsawg kawg nkaus uas yuav tsum muaj cov pa oxygen xav tau rau cov khoom kom tswj tau cov roj sib xyaw nrog cov pa roj thiab nitrogen. Qhov loj dua cov oxygen index, qhov zoo dua cov nplaim hluav taws retardant thaj chaw ntawm cov khoom. Cov pa taws ua kom muaj kev sib txuas lus los ntawm kev ntsuas cov kev sib txuas lus ntawm cov pa hluav taws xob hla los ntawm cov pa hluav taws xob ntawm cov khoom hauv ib qho chaw thiab kho qhov chaw ntev. Qhov qis dua cov pa luam yeeb kev xav, txo qis pa nqus dej thiab cov khoom siv zoo dua.
4. Fais kos tus tiv thaiv cov ntaub ntawv
Muaj ntau ntxiv thiab ntau dua txhua tus-tshaj tawm tus kheej kho qhov muag cable (ADSS) pw hauv tib lub pej thuam nrog cov kab hluav taws xob siab hauv fais fab. Txhawm rau kom kov yeej txoj kev cuam tshuam hluav taws xob induction hluav taws xob tiv thaiv cov pa roj carbon dub, qhov loj me ntxiv kom cov khoom siv hluav taws xob tsis zoo ua rau muaj hluav taws xob muaj txiaj ntsig zoo.
Lub sij hawm Post: Lub Yim Hli 26-2024