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Tsev > Xov xwm > Ntsiab lus
Tham txog Cov Yam Ntxwv ntawm Ib Tug Pheej Nyuaj Hluav Taws Xob thiab Cable
May 26, 2018

Cov ntsiab lus muaj kev puas tsuaj muaj txiaj ntsim zoo. Tam sim no, lub npe hu ua dog dig puag ncig tus qauv hlau thiab cable yog hais txog cov cables muaj taug txhuas, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, thiab polybrominated diphenyl ethers nyob rau hauv lub Scope ntawm EU RoHS cov cai. Thiab txoj hlua thiab lub thaiv kab yuav tsum tsis txhob muaj tej tshuaj hormones thiab yuav tsum tsis txhob paug cov av thiab dej. Kev nplhaib-kub nyhiab, kev nyab xeeb nyob puag ncig hluav taws thiab cov cables muaj cov nplaim hluav taws zoo. Thaum ntsib teeb meem thiab hluav taws, lawv tuaj yeem tiv thaiv kev sib kis ceev ceev thiab sib kis ntawm cov nplaim hluav taws, tswj lawv hauv cheeb tsam tsawg, thiab txo qis dua. Kev tiv thaiv ib puag ncig hluav taws xob tiv thaiv hluav taws xob: hais txog halogen tsis muaj hluav taws xob uas muaj hluav taws xob tsis zoo, tsis yog tag nrho ua tau raws li qhov yuav tsum tau muaj ntawm kev tiv thaiv hluav taws xob, tiam sis kuj tsis muaj halogen, thiab yuav tsis tsim kev kub ntxhov thiab corrosive gases tom qab combustion. Raws li qhov yuav tsum tau muaj ntawm kev tiv thaiv ib puag ncig, cov nplaim taws ua rau cov nplaim hluav taws tuaj yeem tias cov roj tso tawm thaum lub sij hawm sib tua muaj cov yam ntxwv tsis tshua muaj neeg haus luam yeeb, tsis muaj halogen dawb thiab tsis muaj tshuaj lom neeg uas tsis muaj qhov phem ntxiv. Yog tias hluav taws kub, kom paub tseeb tias txhua tus neeg muaj kev khiav dej num, qhov kev pom deb yuav tsum tsis pub tsawg tshaj 15m, thiab pom pom ntawm qee qhov xeeb ceem hlau thiab cable thaum hlawv cov pa taws tau 97m, thiab kab dav dav xwb 5-8m. Kev tiv thaiv hluav taws kub-hluav taws xob feem ntau yog siv. Cov tub ntxhais kawm qib siab cov neeg nyiam ua rau cov pa luam yeeb dawb, ua pa dej ntau, thiab haus luam yeeb heev.


Qhov ntsuas kub ua tau nce thiab lub peev xwm nce tau nce. Feem ntau cov qauv PVC qhov kub kub yog 70 ° C, thiab ib puag ncig tiv thaiv cua kub yog 105 ° C, 125 ° C, 150 ° C, siab tshaj qhov kab cable 30 ° C ~ 60 ° C. Tom qab kuaj, cov xaim ntsuab nrog tib qhov kev qhia tshwj xeeb yuav tsum tau nce ntau dua li 30% mus rau 50% tshaj qhov muaj peev xwm ntawm lub cev tsis zoo, thiab qhov kev sib tw ntawm kev sib txuas lus kuj tuaj yeem raug nce ntau dua li 80%. Halogen-free environmentally friendly conductors yog feem ntau cov khoom siv sib txuas. Nyob rau hauv xyoo tas los, txoj kev lag luam cable feem ntau tau siv cov kev sib txuas ntawm kev sib txuas ntawm txoj kab sib txuas, thiab cov qauv ntaub ntawv ntawm cov khoom polyolefin tau hloov los ntawm tus thawj Txoj kev tawm qauv yog hloov mus rau hauv ib lub qauv mesh. Tus txheej txheem no yuav ua rau kom qhov kub ntawm lub cable thiab kev muaj peev xwm los tiv thaiv instantaneous siab tam sim no muaj peev xwm nyob rau hauv cov ntaub ntawv ntawm ib tug luv Circuit Court, thiab zoo heev nce qib kub tsis txaus. Txawm hais tias tus nqi hluav taws xob tiv thaiv hluav taws xob muaj zog ntau dua, tab sis yuav tsum muaj qhov nce ntawm qhov peev txheej tam sim no, qhov zoo tshaj plaws ntawm cov hluav taws xob tiv thaiv hluav taws xob zoo tshaj tus nqi, uas yog hais tias, tib lub sijhawm tam sim no muaj peev xwm, thiab tus nqi ntawm qhov chaw tiv thaiv hluav taws xob tsis zoo yog qhov tsawg.


Yog li, yog tam sim no lub xeev ntawm txoj kev loj hlob ntawm ib puag ncig zoo phooj ywg hlau thiab kab?


Xyoo 1980, lub ntiaj teb tau pib tsim cov khoom siv hluav taws xob tsawg tsawg-tsis muaj hluav taws xob rau hluav taws xob thiab kab hlau. Qhov zoo ntawm cov khoom siv no yog cov pa uas tsis tshua muaj thiab tsis muaj kuab lom. Thaum kub hnyiab los ntawm qhib hluav taws, hlau oxides thiab dej pa pa tau raug tsim. Cov hluav taws xob tsis muaj hluav taws xob uas tsis muaj hluav taws xob polyolene uas yog polyolene polyolene uas yog siv cov polyethylene matrix los siv cov hydroxide los ntawm EVA (ethylene-vinyl acetate copolymer) uas muaj roj ntau ntawm magnesium hydroxide los sis aluminium hydroxide . Thaum twg cov khoom siv ua kom sov thiab hlawv, nws yog decomposed rau hauv cov hlau oxides thiab dej kom cuag lub hom phiaj ntawm nplaim retardancy. Cov mis nyuj tov yog raws li nram no:


Mg (OH) 2 → MgO + H2O Endothermic


2A (OH) 3 → Al2O3 + 3H2O Endothermic


Cov nplaim hluav taws xob tsis muaj hluav taws xob polyolefin hluav taws xob yog cov nplaim taws kub nyhiab los ntawm txoj kev kub hnyiab thiab cov hlau oxide cais tawm. Lub nplaim hluav taws xob tshuab yog raws li nram no: Ua ntej, thaum lub xaim hlau thiab hlawv kub hnyiab, lub hau hydroxide ntim thiab cov tshuaj tiv thaiv yog endothermic. Cov tshuaj tiv thaiv absorbs ib qho loj npaum li cas ntawm cov cua sov nyob rau hauv cov huab cua surrounding thiab txo qhov ntsuas kub ntawm cov hlau thiab kab hluav taws xob. Qhov thib ob yog tias cov dej molecules uas tsim tawm nqus cov cua kub loj hauv cov xaim hlau thiab kab, thiab cov pa dej kuj thaiv cov pa oxygen. Qhov thib peb yog hlau oxide ua. Txhiv tshaj tawm tiv thaiv kev sib txuas ntxiv ntawm oxygen thiab organic teeb meem.


Cov teb chaws tsim tau tsim cov kab mob tsis tshua muaj pa hluav taws tsawg xyoo 1980 thiab xav kom siv cov xov tooj hluav taws xob tsis zoo thiab kab xev los hloov thiab maj mam pov tseg cov xaim hluav taws xob PVC thiab cov cab. Qhov no txhais tau hais tias lub toxicity ntawm halogen-muaj cables nyob rau hauv qhov hluav taws kub yog phem heev. Yog tias lub toxicity index ntawm lub roj concentration uas tuaj yeem ua rau tuag hauv 30 feeb yog txiav txim siab ua 1, ces cov tshuaj toxicity index ntawm polyvinyl chloride yog 15.01. Lub halogen dawb polyolefin muaj ib qhov tshuaj lom tovicity ntawm 0.79. Cov neeg tsuas muaj peev xwm nyob tau ntev li 2 nas this ntawm cov pa luam yeeb ntawm polyvinyl chloride, thiab tsis muaj cov ntaub ntawv tsis muaj halogen, tib neeg muaj txoj sia nyob hauv lawv cov pa luam yeeb tau ntev txog 40 feeb, uas ua rau lub sij hawm muaj kev khiav tawm thaum muaj hluav taws. Tsis tas li ntawd, raws li cov ntaub ntawv tseem ceeb, lub teeb kis ntawm cov pa luam yeeb tawm los ntawm cov nplaim hluav taws xob tiv thaiv PVC tsawg dua 15%. Uas yog hais, yog hais tias tus neeg nyob hauv no concentration, qhov muag liab nrug ze li 2 meters. Yog li ntawd, nyob hauv qhov cub, cov pa taws ua rau cov neeg raug teeb meem tsis sib to taub txog qhov teeb meem, ua rau lub sij hawm siv nyob rau hauv qhov hluav taws kub, uas ua rau lub pa luam yeeb ntxiv thiab cov pa roj carbon dioxide thiab kev tuag.


Hauv ntau qhov kev soj ntsuam, nws tau pom tias cov pa luam yeeb thiab cov roj halogen acid gas volatilisation ntawm cov roj cua tau tso tawm los ntawm combining cov ntaub ntawv polyolefin thiab hydrated hlau compounds Al (OH) 3 lossis Mg (OH) 3 li cov nplaim taws tuaj yeem ncav cuag IEC tus qauv tsim nyog. Al (OH) 3 los yog Mg (OH) 2 yog ib qho dej tsis haum, uas muaj cov nplaim hluav taws xob, tsis muaj tshuaj lom neeg, pa luam yeeb, thiab tsis muaj pa luam yeeb, vim qhov kev tua hluav taws thiab kev tua Kub nyhiab tseem ceeb heev.


Cov teb chaws uas tau tsim muaj txuas nrog txoj kev tshawb nrhiav, kev txhim kho, thiab kev siv cov hluav taws xob tsis muaj hluav taws xob uas tsis muaj hluav taws xob thiab xov tooj cua thiab lwm yam ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv cov tsev sib txuas los yog cov vaj tse thiab cov chaw xws li siab - cov vaj tse, cov chaw hauv qab ntug, cov chaw, cov tshav dav hlau, cov chaw siv hluav taws xob, thiab cov khw malls. Xyoo tas los, tsim tau lub teb chaws siv kev siv lead, cadmium, thiab lwm yam hlau hnyav xws li lead thiab cadmium, polybrominated biphenyls (PBB), thiab polybrominated diphenyl ethers (PBDE) hauv cov khoom hluav taws xob thiab hluav taws xob. Cov tshuab hluav taws xob thiab electronics Giants nyob rau hauv lub tebchaws tau tsim Tsim lawv cov "cov kev npaj ntsuab" txwv los yog txwv tsis pub siv cov hlau loj thiab halogens uas tsim kev puas tsuaj rau tib neeg lub cev thiab qhov chaw, thiab tau ua ntau yam kev tshawb nrhiav thiab kev ua haujlwm, tau tshaj tawm ntawm "hluav taws xob" hluav taws xob thiab hluav taws xob thiab cov cables. Qee lub tebchaws, xws li Switzerland thiab lub teb chaws Yelemees, xav tawmtsam txoj kev thov ntawm PVC, thiab twb tau tsim cov cai nruj heev uas yuav txwv thiab thaum kawg tshem tawm cov PVC.


Txoj kev loj hlob thiab kev siv hluav taws xob tsis muaj hluav taws xob tsis muaj hluav taws xob thiab xov tooj cua thiab lwm yam khoom hauv Suav teb poob qab hauv cov teb chaws tau tsim tawm li ntawm 10 xyoo. Nws yog tsuas yog tom qab xyoo 2000 tias nws maj mam tshem ntawm qhov teeb meem ntawm relying nkaus ntawm imports. Tam sim no kev ua haujlwm ntawm cov hluav taws xob tsis muaj hluav taws xob uas tsis muaj hluav taws xob thiab hluav taws xob thiab lwm yam khoom siv tau ua raws li cov kev cai hauv teb chaws thiab thoob ntiaj teb, tab sis cov neeg paub txog kev tiv thaiv thiab kev nyab xeeb tseem yuav tsum tau kho, thiab cov khoom yuav tsum nce.


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