Common Plastics Rau Hlau Thiab Cables

Polyethylene yog cov yas uas siv dav thiab siv ntau tam sim no. Raws li cov ntaub ntawv nyob rau hauv lub rooj, polyethylene yog ib tug zoo hluav taws xob rwb thaiv tsev cov ntaub ntawv nrog meson poob, siab resistivity, siab breakdown teb zog, zoo huab cua kuj thiab processability. Txawm li cas los xij, vim nws qhov kub tsis ua haujlwm, nws yog siv los ua cov rwb thaiv tsev ntawm kev sib txuas lus cables. Qhov nruab nrab ntom ntom thiab ntom ntom polyethylene muaj lub zog siab thiab tawv thiab tsis muaj dej permeability. Lawv feem ntau yog siv los ua cable sheath. Txawm li cas los xij, polyethylene muaj qhov tsis zoo ntawm Z loj, uas yog, nws yooj yim rau hlawv thiab muaj cov pa luam yeeb dub muaj zog. Yog li ntawd, nws daim ntawv thov tau coj ntau yam kev phom sij rau ib puag ncig.

Crosslinked polyethylene yog ib qho zoo heev thermosetting insulating cov ntaub ntawv tsim los ntawm kev ntxiv crosslinking tus neeg saib xyuas kom tsawg - ntom polyethylene. Nyob rau hauv lub hauv paus ntawm inheriting ntau yam zoo heev ntawm polyethylene, nws txhim kho cov neeg kho tshuab zog, huab cua tsis kam thiab tso cai rau ua hauj lwm kub, yog li nws tau los ua ib tug zoo insulating khoom rau lub hwj chim cable Z tam sim no.

Vim muaj cov sib txawv crosslinking agents, sib txawv crosslinking txheej txheem raug tsim. Tam sim no, muaj peb hom tshuaj crosslinking, dej sov crosslinking thiab irradiation crosslinking. Tshuaj crosslinking yog siv rau nruab nrab thiab high voltage cables (xws li 10kV thiab saum toj no); Cov dej sov sib txuas thiab irradiation crosslinking feem ntau yog siv rau qis - voltage cables (1kV thiab hauv qab).

Kev rwb thaiv tsev ntawm XLPE yog ze ze rau nws cov purity. Lub rwb thaiv tsev ntawm siab - voltage thiab ultra - siab - voltage cables saum 35kV yuav tsum tau txais ultra - huv cross - txuas polyethylene, uas yuav tsum tsis tsuas yog siab purity ntawm raw cov ntaub ntawv, tab sis kuj siab huv huv ntawm ntoo khaub lig 686567 thiab ruaj khov txheej txheem. thiab txhim khu kev qha txheej txheem.

Nws yuav tsum tau muab sau tseg tias cov rwb thaiv tsev ntawm polyethylene thiab hla - txuas polyethylene muaj ib"quirk", uas yog, lawv tsim nyog rau AC rwb thaiv tsev es DC rwb thaiv tsev, tshwj xeeb tshaj yog DC high voltage yuav txo tau lawv. rwb thaiv tsev lub neej. Yog li ntawd, cov rwb thaiv tsev ntawm DC cables feem ntau siv cov roj hmab rwb thaiv tsev los yog roj ntawv rwb thaiv tsev. Ntxiv mus, polyethylene thiab hla - txuas polyethylene rwb thaiv tsev muaj" ntshai dej", thiab lawv txoj kev tawg feem ntau cuam tshuam txog kev muaj dej, uas yog, tsim ntawm" cov ceg dej [ &] quot; nyob rau hauv high voltage, ua rau rwb thaiv tsev puas. Yog li ntawd, thaum polyethylene thiab hla - txuas polyethylene yog siv los ua cov rwb thaiv tsev ntawm - voltage thiab ultra - siab - voltage cables, dej yuav tsum raug zam nyob rau hauv cov txheej txheem ntawm kev ua, cia, tsheb thauj mus los thiab rwb thaiv tsev extrusion, thiab yuav tsum muaj dej thaiv cov qauv. sab nraum lub cable rwb thaiv tsev ntaub thaiv npog, xws li hlau sheath.

Piv nrog polyethylene, polyvinyl chloride thiab ntawv rwb thaiv tsev, ib qho Z zoo dua ntawm cov ntoo khaub lig - txuas polyethylene rwb thaiv tsev yog tias qhov kub thiab txias ua haujlwm tau nce los ntawm 20 degree, uas txhim kho kev nyab xeeb ntawm cov cable thiab txo cov nqi nkag ntawm cov cable. Piv txwv li, thaum cov kab ntws zoo ib yam (xws li 300A), tus ntoo khaub lig - ntu ntawm cov tooj liab tus neeg xyuas pib ntawm polyethylene lossis polyvinyl chloride insulated cable (xws li YV lossis VV) xav tau 120mm2, thaum tus ntoo khaub lig - txuas polyethylene insulated daim kab xev txiv neej' tus ntaus pob ncaws pob tooj liab xav tau tsuas yog 70mm2. Nws tuaj yeem pom tias qhov zoo ntawm XLPE insulated cable zoo npaum li cas.

PVC muaj lub cev zoo thiab cov khoom siv kho tshuab thiab cov txheej txheem zoo heev. Nws tsis yog tsuas yog siv cov yas siv ntau tshaj plaws nyob rau hauv lub xyoo pua 20th, tab sis kuj tseem yog cov khoom siv insulating tseem ceeb thiab cov ntaub qhwv uas tsis tshua muaj - voltage xov hlau thiab cables. Txawm li cas los xij, nyob rau hauv lub xyoo pua 21st, PVC yuav maj mam txo qis los yog tseem ploj mus hauv kev lag luam cable. Muaj ob qho laj thawj. Ntawm ib sab, tib neeg' kev paub txog kev nyab xeeb tau txhim kho thiab vam tias yuav siv halogen - cov ntaub ntawv pub dawb, yog li muaj ntau yam khoom siv halogen - dawb tuaj ua. Tsis muaj qhov tsis ntseeg tias nws yuav dhau los ua qhov nyiam tshiab ntawm kev lag luam cable hauv xyoo pua 21st thiab tuav lub khw. Ntawm qhov tod tes, pvc muaj tsib qhov tsis muaj zog: ua ntej, nws muaj qhov siab ceev, txog 1.5 zaug ntawm XLPE, thiab Rwb thaiv tsev rwb thaiv tsev; Qhov thib ob, kev ua haujlwm kub yog tsawg; Thib peb, lub dielectric poob siab, ntau dua 100 npaug siab dua qhov hla - txuas polyethylene; Plaub, tsis zoo txias tsis kam (- brittle ntawm 15 degree); Thib tsib, cov pa tshuaj lom (HCl) raug tso tawm thaum lub sij hawm combustion. Cov khoom siv hluav taws xob, hluav taws xob hluav taws xob thiab hluav taws xob tiv thaiv ntawm crosslinked PVC tsim nyob rau xyoo tas los no tau txhim kho zoo heev. Qee qhov me me cables tau nkag mus rau hauv kev lag luam los ntawm cov txheej txheem irradiation thiab tau siv rau hauv cov khoom siv hluav taws xob, siab - voltage lead xov hlau, tsheb xov hlau thiab cov xaim hauv tsev, tab sis lawv cov teeb meem halogen tsis tuaj yeem hloov pauv.

Fluoroplastics yog dav siv nyob rau hauv cov xov hlau thiab cables vim lawv kub ua hauj lwm, me me nruab nrab, zoo rwb thaiv tsev, huab cua tsis kam, acid thiab alkali tsis kam, roj kuj thiab nplaim retardancy.