EPDM (ethylene diene monomer) ntsaws ruaj ruaj rau lawv cov huab cua tsis kam, thiab cov hluav taws xob rwb thaiv tsev. Thaum nws los txog rau hluav taws {{- kev siv hluav taws xob EPDM, lawv tau tsim kho kom muab cov txheej txheem kev nyab xeeb ntxiv los ntawm kev tawm tsam kev kis hluav taws thiab pa taws. Raws li tus xa khoom ntawm hluav taws - loos secords EPDM, Kuv nquag nug txog cov ntaub ntawv uas mus ua cov khoom tseem ceeb no. Hauv no blog ncej, Kuv yuav delve rau hauv cov ntaub ntawv tseem ceeb siv nyob rau hauv hluav taws - rated EPDM ntsaws ruaj ruaj thiab lawv qhov tseem ceeb.
Cov Khoom Siv Hauv: EPDM Roj Hmab
Lub hauv paus ntawm hluav taws kub -} kev muab ntsaws rau EPDM yog, tau kawg, EPDM roj hmab. EPDM yog ib qho hluavtaws Elastomer paub txog nws cov durability zoo nkauj thiab tiv taus rau ib puag ncig cov khoom. Nws yog tsim los ntawm ethylene, propylene, thiab ib qho me me ntawm diene monomer. Cov qauv tshuaj tshwj xeeb no muab cov roj hmab EPDM nws cov khoom zoo kawg, xws li teeb tsa siab, thiab tsis tshua muaj pa rau cua sov, oxygen, thiab UV hluav taws xob.
Nyob rau hauv cov ntsiab lus ntawm hluav taws - rated ntsaws ruaj ruaj, EPDM roj hmab ua haujlwm ua cov matrix uas tuav lwm yam sib sau ua ke. Nws muab lub foob nrog nws cov duab yooj yim, hloov tau yooj yim, thiab kev ua yeeb yam. Qhov siab elasticity ntawm EPDM tso cai rau lub foob rau ua raws li cov chaw tsis xwm yeem, ua kom muaj lub cim nruj thiab txhim khu kev qha. Ntxiv mus, nws tsis kam mus ua cua sov thiab kev laus pab tswj kev ncaj ncees ntawm lub foob nyob rau lub sijhawm dhau los, txawm tias muaj xwm txheej hnyav.
Hluav taws kub - tiv taus fillers
Txhawm rau txhim kho qhov hluav taws kub tsis kam ntawm EPDM ntsaws ruaj ruaj, ntau lub teeb taws {{}} tsis kam rau cov roj hmab sib txuas. Cov ntsaws ruaj ruaj ua raws li nplaim retardants, txo cov nplaim taws ntawm lub foob thiab qeeb qeeb kev kis hluav taws. Qee cov hluav taws kub feem ntau {}} tiv taus fillers hauv hluav taws {}} rated EPDM ntsaws ruaj ruaj suav nrog:
Aluminium hydroxide (Ath): Athe yog ib qho hluav taws xob siv dav hlau retardant hauv kev lag luam roj hmab. Thaum nthuav tawm cov cua sov, ath decostermically endothermically, nqus cov cua sov thiab tso dej vapor. Cov txheej txheem no pab txias cov cheeb tsam ib puag ncig thiab ua rau cov roj txuas sib xyaw ua ke, yog li txo qhov kev pheej hmoo ntawm kev tiv thaiv thiab nplaim taws sib kis. Aton kuj tseem ua cov txheej txheej ntawm cov txheej txheem tiv thaiv ntawm cov npoo ntawm lub foob, uas ua raws li kev thaiv kev tiv thaiv cua sov thiab oxygen.
Magnesium hydroxide (MDH): Zoo ib yam li Athe, MDH yog lwm qhov nrov nrov retardant uas decomposes endwmermically thaum rhuab. Nws muaj cov hluav taws kub ua tau zoo heev thiab pa luam yeeb cov khoom lag luam. MDH feem ntau siv nyob rau hauv kev sib xyaw nrog Athe kom ua tiav cov nyhuv synergistic, txuas ntxiv txhim kho hluav taws kev ua haujlwm ntawm lub foob.
Sillica: Silica yog qhov tsis yog - commustible muab tub lim uas tuaj yeem txhim kho cov cuab yeej siv EPDM ntawm EPDM ntsaws ruaj ruaj. Nws ua raws li cov insulator kub, txo qhov hloov ntawm cua sov los ntawm lub foob. Silica tseem txhim kho qhov kev tsim lub sijhawm thaum lub sijhawm ua ke, muab kev tiv thaiv kev tiv thaiv kev tiv thaiv ntxiv rau hluav taws.
Cov Khoom Siv Intumescent: Inumbescent cov ntaub ntawv yog cov tshuaj uas nthuav dav thaum raug cua sov, sib sau cov tuab, insulating char txheej. Lawv feem ntau siv nyob rau hauv hluav taws - rated EPDM ntsaws ruaj ruaj los muab kev tiv thaiv hluav taws. Thaum hluav taws kub tshwm sim, cov khoom siv intumbescent nyob rau hauv lub foob cov khoom nthuav, sau cov khoob thiab tsim ib qho kev thaiv ntawm hluav taws, haus luam yeeb, thiab cov pa kub. Qhov no pab kom muaj kev ncaj ncees ntawm cov hluav taws kub - kev sib sau ua ke thiab muab sijhawm muaj txiaj ntsig zoo rau kev khiav tawm thiab tua hluav taws.
Hla -} cov khoom siv sib txuas
Hla - Cov neeg sawv cev sib txuas yog siv los ntawm cov khoom siv roj polymer hauv cov roj hmab EPDM, sib sau ib qho peb- didensional network qauv. Cov txheej txheem no, paub tias yog vulcanization, txhim kho cov cuab yeej ua haujlwm, kub ua hauj, thiab tshuaj lom neeg tiv thaiv lub foob. Hauv hluav taws - rated EPDM ntsaws ruaj ruaj, hla}}} Cov link linkု {linking ua si lub cim kev ncaj ncees ntawm lub foob hauv qab hluav taws.
Ib qho ntawm cov cross - li cov neeg sawv cev hauv EPDM Roj Hmab yog leej faj. Sulphur vulcanization tsim cov sulphur bridges ntawm polymer chains, uas ua rau muaj ntau dua thiab cua sov {2} {resiveant cov khoom. Txawm li cas los xij, leej faj vulcanization kuj tseem tuaj yeem txo qhov yooj ntawm lub foob rau qee qhov. Yuav kom kov yeej txoj kev txwv no, lwm tus ntoo khaub lig- li cov neeg sawv cev, xws li pom neeg, qee zaum siv. Peroxide vulcanization ua qhov hloov tau ntau dua thiab cua sov {{{{}} tiv taus rau cov ntawv thov yuav tsum muaj.
Lwm Yam Ntxiv
Ntxiv rau cov ntaub ntawv saum toj no, hluav taws kub {- rated EPDM ntsaws ruaj ruaj kuj tseem muaj lwm yam kev sib ntxiv los txhim kho lawv cov kev ua tau zoo thiab ua haujlwm. Cov kev ntxiv no suav nrog:
Antioxidants: Antioxidants yog siv los tiv thaiv cov opdm roj hmab, uas tuaj yeem ua rau nws ua rau nws ua rau ncua sijhawm. Los ntawm inhibiting cov txheej txheem oxidation, cov tshuaj tua kab mob pab tswj lub cev lub cev thiab cov kws kho tshuab ntawm lub foob, kom muaj qhov ntev-}} lo lus ruaj khov.
Ua AIDS: Ua AIDS siv los txhim kho cov ntws thiab txheej txheem ntawm cov roj hmab sib txuas thaum tsim khoom. Lawv pab txo cov viscosity ntawm cov compound, ua rau nws yooj yim dua rau pwm thiab puab cov foob. Ua AIDS tseem txhim kho cov kev faib tawm ntawm cov tub lim thiab lwm yam kev sib ntxiv hauv cov roj hmab matrix, ua kom muaj cov khoom sib txawv thiab cov khoom lag luam zoo ib yam.
Cov xim: Colorants yog siv los muab hluav taws kub - rated EPDM ntim cov xim tshwj xeeb. Qhov no tuaj yeem muaj txiaj ntsig rau kev txheeb xyuas lub hom phiaj lossis kom phim rau kev ua kom zoo nkauj rau daim ntawv thov.
Tseem ceeb ntawm kev tswj kom zoo
Raws li tus xa khoom ntawm hluav taws - rated EPDM ntsaws ruaj ruaj, Kuv nkag siab qhov tseem ceeb ntawm kev tswj hwm zoo thiab kev ntseeg tau ntawm peb cov khoom. Peb siv siab - Cov ntaub ntawv raw thiab nruj kev tsim cov txheej txheem kom ntseeg tau tias peb cov ntsaws ruaj ruaj.
Ua ntej raug tso tawm rau kev ua lag luam, peb cov hluav taws kub {{- rated EPDM Ntsaws Nyuaj Siab los xyuas lawv cov hluav taws kub, thiab lwm yam kev ua tau zoo. Peb tseem ua kev tshawb xyuas zoo li qub thiab kev tshuaj xyuas kom ntseeg tau tias peb kev tsim khoom tsim tau zoo ib yam thiab ua tib zoo nrog cov qauv siab tshaj plaws ntawm qhov zoo.
Tag
Hluav taws kub -} rated EPDM cov ntsaws ruaj ruaj yog cov khoom tseem ceeb hauv ntau cov hluav taws tiv thaiv cov kab ke. Lawv tau ua los ntawm kev sib xyaw ntawm EPDM roj hmab, hluav taws kub}} {}}}}}}}} Cov neeg ua ke sib txuas, uas tau sib txuas ua ke, kev sib khi ua ke, thiab kav ntev. Raws li tus xa khoom ntawm hluav taws - loos rated EPDM ntsaws, peb tau cog lus los muab cov khoom lag luam siab uas ua tau raws li lawv cov kev xav tau thiab tshaj lawv cov kev cia siab.
Yog tias koj xav paub txog peb cov hluav taws kub - rated EPDM ntsaws ruaj ruaj, thov koj xav tiv tauj peb. Peb yuav zoo siab los tham txog koj cov kev xav tau thiab muab koj nrog kev daws teeb meem.
