Nkag siab qhov sib txawv ntawm EPDM (ethylene propylene diene monomer) thiab NBR / PVC (nitrile butadiene roj hmab / polyvinyl chloride) yog qhov tseem ceeb thaum xaiv cov khoom siv rau ntau yam kev siv, tshwj xeeb hauv kev lag luam xws li tsheb, kev tsim kho, thiab kev tsim khoom. Ob yam khoom muaj cov khoom tshwj xeeb uas ua rau lawv haum rau kev siv tshwj xeeb, thiab kev nkag siab txog qhov sib txawv no tuaj yeem pab koj txiav txim siab paub.
Kev sib xyaw thiab cov khoom
Ethylene propylene diene monomer (EPDM) yog cov roj hmab hluavtaws paub txog nws cov kev tiv thaiv zoo heev rau cua sov, ozone, thiab huab cua. Nws muaj pes tsawg leeg ntawm ethylene, propylene, thiab diene muab nws cov khoom tshwj xeeb. EPDM qhov elasticity zoo heev thiab muaj peev xwm tiv taus qhov kub thiab txias ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv sab nraum zoov. Nws tseem yog UV- thiab kev laus-tiv taus, ua rau nws yog qhov kev xaiv nrov rau cov vov tsev, cov ntsaws ruaj ruaj, thiab gaskets.
Ntawm qhov tod tes, NBR (nitrile butadiene roj hmab) yog cov roj hmab hluavtaws uas muaj feem ntau ntawm acrylonitrile thiab butadiene. Qhov kev sib xyaw ua ke no muab NBR cov roj zoo thiab cov roj ua haujlwm, ua rau nws nyiam cov khoom siv rau cov roj hoses, cov ntsaws ruaj ruaj, thiab gaskets hauv kev lag luam tsheb. Thaum tsis yog roj hmab, PVC (polyvinyl chloride) yog cov thermoplastic dav siv nrog cov tshuaj tiv thaiv zoo thiab kav ntev. Nws yog feem ntau siv hauv cov kav dej, cable rwb thaiv tsev, thiab siv ntau yam kev siv.
Kub tiv taus
Ib qho ntawm qhov sib txawv tseem ceeb ntawm EPDM thiab NBR / PVC yog lawv qhov kub thiab txias. EPDM feem ntau tuaj yeem tiv taus qhov kub ntawm -40 ° F txog 250 ° F (-40 ° C txog 121 ° C), ua rau nws haum rau ntau qhov chaw ib puag ncig. Hauv qhov sib piv, NBR muaj qhov ntsuas kub qis dua, feem ntau ua tau zoo ntawm -40 ° F thiab 212 ° F (-40 ° C txog 100 ° C). Thaum PVC tau siv dav, nws muaj qhov ntsuas kub tsawg thiab nyhav dhau los ua nkig ntawm qhov kub tsawg.
Tshuaj tiv thaiv
Nyob rau hauv cov nqe lus ntawm cov tshuaj tiv thaiv, NBR sawv tawm rau nws cov tsis kam rau roj, fuels, thiab lwm yam roj av-raws li cov khoom. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv hauv kev lag luam automotive thiab aerospace. Thaum EPDM tiv taus ntau yam tshuaj, nws ua haujlwm tsis zoo rau cov roj thiab roj. PVC, ntawm qhov tod tes, tiv taus ntau yam tshuaj, tab sis tej zaum yuav cuam tshuam los ntawm qee cov kuab tshuaj thiab roj.
EPDM thiab NBR / PVC muaj ntau daim ntawv thov sib txawv vim lawv cov khoom tshwj xeeb. EPDM feem ntau yog siv nyob rau hauv ru tsev systems, automotive weatherstripping, thiab hluav taws xob rwb thaiv tsev. Nws durability thiab tsis kam rau ib puag ncig yam ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau kev siv sab nraum zoov. NBR feem ntau yog siv hauv kev lag luam tsheb rau kev siv roj- thiab roj-resistant xws li gaskets, seals, thiab hoses. PVC, vim nws lub zog thiab ntau yam, yog siv dav hauv cov kav dej, fittings, thiab hluav taws xob rwb thaiv tsev.
Kev txiav txim siab nqi
Tus nqi yog lwm qhov yuav tsum tau xav txog thaum xaiv ntawm EPDM thiab NBR / PVC. Feem ntau, EPDM nyiam kim dua NBR vim nws cov khoom zoo tshaj thiab kev ua tau zoo hauv qhov chaw hnyav. PVC feem ntau yog qhov kev xaiv zoo tshaj plaws, ua rau nws yog qhov kev xaiv nrov rau cov phiaj xwm nyiaj txiag.
Thaum kawg, kev xaiv ntawm EPDM thiab NBR / PVC cov ntaub ntawv feem ntau nyob ntawm qhov tshwj xeeb ntawm daim ntawv thov. EPDM yog qhov zoo tagnrho rau kev siv sab nraum zoov uas xav tau huab cua zoo heev, thaum NBR yog cov khoom siv rau cov roj thiab roj tsis kam hauv kev siv tsheb. PVC muaj versatility thiab nqi-effectiveness, ua tau raws li ntau yam kev tsim kho xav tau. Kev nkag siab txog qhov sib txawv no tuaj yeem pab engineers, manufacturers, thiab cov neeg siv khoom txiav txim siab raws li lawv qhov project xav tau.
Post lub sij hawm: Aug-15-2025
