Qhov txawv ntawm EPDM thiab NBR/PVC cov ntaub ntawv yog dab tsi?

Kev nkag siab txog 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 ntaub ntawv rau ntau yam kev siv, tshwj xeeb tshaj yog hauv kev lag luam xws li tsheb, kev tsim kho, thiab kev tsim khoom. Ob qho tib si muaj cov yam ntxwv 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 tau zoo.

Cov khoom sib xyaw thiab cov khoom

Ethylene propylene diene monomer (EPDM) yog ib hom roj hmab tsim uas paub zoo txog nws txoj kev tiv taus cua sov, ozone, thiab huab cua zoo heev. Nws cov khoom sib xyaw ua ke ntawm ethylene, propylene, thiab diene ua rau nws muaj cov yam ntxwv tshwj xeeb. EPDM txoj kev ywj pheej zoo heev thiab muaj peev xwm tiv taus qhov kub thiab txias heev ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv sab nraum zoov. Nws kuj tseem tiv taus UV thiab laus, ua rau nws yog qhov kev xaiv nrov rau cov ntaub thaiv ru tsev, cov foob, thiab cov gaskets.

Ntawm qhov tod tes, NBR (nitrile butadiene roj hmab) yog cov roj hmab tsim los ntawm acrylonitrile thiab butadiene. Qhov kev sib xyaw ua ke no ua rau NBR tiv taus roj thiab roj zoo heev, ua rau nws yog cov khoom siv zoo rau cov yeeb nkab roj, cov foob, thiab cov gaskets hauv kev lag luam tsheb. Txawm hais tias tsis yog roj hmab, PVC (polyvinyl chloride) yog cov thermoplastic siv dav dav nrog kev tiv taus tshuaj lom neeg zoo thiab ruaj khov. Nws feem ntau siv rau hauv cov kav dej, cov rwb thaiv tsev cable, thiab ntau yam kev siv hauv kev tsim kho.

Kev tiv taus kub

Ib qho ntawm qhov sib txawv tseem ceeb tshaj plaws ntawm EPDM thiab NBR/PVC yog lawv qhov kev tiv taus kub. EPDM feem ntau tuaj yeem tiv taus kub ntawm -40°F txog 250°F (-40°C txog 121°C), ua rau nws haum rau ntau qhov chaw ib puag ncig. Qhov sib piv, NBR muaj qhov kub qis dua, feem ntau ua tau zoo ntawm -40°F thiab 212°F (-40°C txog 100°C). Txawm hais tias PVC siv dav, nws muaj qhov kub tsawg thiab feem ntau yuav tawg yooj yim thaum kub qis.

Kev tiv thaiv tshuaj lom neeg

Hais txog kev tiv taus tshuaj lom neeg, NBR sawv tawm rau nws txoj kev tiv taus roj, roj, thiab lwm yam khoom siv roj av. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv hauv kev lag luam tsheb thiab aerospace. Txawm hais tias EPDM tiv taus ntau yam tshuaj lom neeg, nws ua tsis tau zoo hauv kev tiv taus roj thiab roj. PVC, ntawm qhov tod tes, tiv taus ntau yam tshuaj lom neeg tab sis tej zaum yuav raug cuam tshuam los ntawm qee cov kuab tshuaj thiab roj.

EPDM thiab NBR/PVC muaj ntau yam kev siv sib txawv vim lawv cov yam ntxwv tshwj xeeb. EPDM feem ntau siv rau hauv cov ru tsev, cov khoom siv tiv thaiv huab cua hauv tsheb, thiab kev rwb thaiv hluav taws xob. Nws lub zog thiab kev tiv taus cov yam ntxwv ib puag ncig ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv sab nraum zoov. NBR feem ntau yog siv hauv kev lag luam tsheb rau cov ntawv thov tiv taus roj thiab roj xws li gaskets, seals, thiab hoses. PVC, vim nws lub zog thiab kev hloov pauv tau, yog siv dav hauv kev tsim cov kav dej, cov khoom sib txuas, thiab kev rwb thaiv hluav taws xob.

Kev Xav Txog Tus Nqi

Tus nqi yog lwm yam uas yuav tsum xav txog thaum xaiv EPDM thiab NBR/PVC. Feem ntau, EPDM feem ntau kim dua NBR vim nws cov khoom zoo thiab kev ua tau zoo hauv qhov chaw nyuaj. PVC feem ntau yog qhov kev xaiv pheej yig tshaj plaws, ua rau nws yog qhov kev xaiv nrov rau cov haujlwm uas xav tau nyiaj tsawg.

Thaum kawg, qhov kev xaiv ntawm EPDM thiab NBR/PVC cov ntaub ntawv nyob ntawm seb qhov yuav tsum tau ua li cas. EPDM zoo tagnrho rau cov ntawv thov sab nraum zoov uas xav tau kev tiv thaiv huab cua zoo heev, thaum NBR yog cov khoom siv zoo tshaj plaws rau kev tiv thaiv roj thiab roj hauv kev siv tsheb. PVC muaj kev hloov pauv tau yooj yim thiab pheej yig, ua tau raws li ntau yam kev xav tau ntawm kev tsim kho. Kev nkag siab txog qhov sib txawv no tuaj yeem pab cov engineers, cov chaw tsim khoom, thiab cov neeg siv khoom txiav txim siab raws li lawv cov kev xav tau.