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

Hauv kev siv hauv kev lag luam, kev xaiv cov khoom siv yog qhov tseem ceeb heev kom ntseeg tau tias muaj zog, ua tau zoo, thiab tsim nyog tus nqi. Ob yam khoom siv roj hmab hluavtaws uas siv ntau yog roj hmab nitrile (NBR) thiab ethylene propylene diene monomer (EPDM). Txawm hais tias ob yam khoom siv muaj lawv tus kheej cov yam ntxwv thiab kev siv, kev nkag siab txog lawv qhov sib txawv yog qhov tseem ceeb rau kev xaiv cov khoom siv zoo rau cov kev xav tau tshwj xeeb.

Cov khoom xyaw thiab cov khoom

NBR yog ib qho copolymer ua los ntawm acrylonitrile thiab butadiene. Cov ntsiab lus acrylonitrile hauv NBR feem ntau yog ntawm 18% thiab 50%, uas cuam tshuam rau nws cov roj tsis kam thiab cov khoom siv kho tshuab. NBR paub txog nws qhov kev tiv thaiv zoo rau cov roj, roj thiab lwm yam tshuaj lom neeg, ua rau nws yog cov khoom siv xaiv rau kev siv tsheb thiab kev lag luam uas feem ntau kov cov tshuaj no. NBR kuj muaj lub zog tensile zoo, tiv taus kev sib txhuam thiab kev ywj pheej, uas yog qhov tseem ceeb rau cov foob, gaskets thiab hoses.

Ntawm qhov tod tes, EPDM yog ib qho terpolymer ua los ntawm ethylene, propylene, thiab diene. Cov khoom sib xyaw tshwj xeeb no ua rau EPDM tiv taus huab cua zoo heev, ruaj khov UV, thiab tiv taus ozone. EPDM yog qhov tsim nyog rau kev siv sab nraum zoov xws li cov ntaub thaiv ru tsev, cov ntaub thaiv huab cua hauv tsheb, thiab cov foob uas yuav tsum tiv taus cov xwm txheej ib puag ncig hnyav. Tsis tas li ntawd, EPDM tseem yoog tau ntawm qhov kub qis, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv huab cua txias.

Kev tiv thaiv kub

Kev tiv taus kub siab yog lwm qhov sib txawv tseem ceeb ntawm NBR thiab EPDM. NBR feem ntau ua tau zoo hauv qhov kub ntawm -40 ° C txog 100 ° C (-40 ° F txog 212 ° F), nyob ntawm cov qauv tshwj xeeb. Txawm li cas los xij, kev raug kub siab ntev tuaj yeem ua rau puas tsuaj. Qhov sib txawv, EPDM tuaj yeem tiv taus qhov kub ntau dua, txij li -50 ° C txog 150 ° C (-58 ° F txog 302 ° F), ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas xav tau kev ywj pheej siab hauv cov xwm txheej hnyav.

Kev tiv thaiv tshuaj lom neeg

Hais txog kev tiv taus tshuaj lom neeg, NBR ua tau zoo hauv cov chaw muaj roj thiab roj av. Vim nws muaj peev xwm tiv taus cov khoom siv roj av, NBR feem ntau siv hauv kev lag luam tsheb rau cov yeeb nkab roj, O-rings, thiab cov foob. Txawm li cas los xij, NBR tsis tiv taus cov kuab tshuaj polar, acids, lossis cov hauv paus, uas tuaj yeem ua rau nws o lossis lwj.

EPDM, ntawm qhov tod tes, nws tiv taus dej, pa dej, thiab ntau yam tshuaj lom neeg, suav nrog cov kua qaub thiab cov hauv paus. Qhov no ua rau nws zoo tagnrho rau kev lag luam ua tshuaj lom neeg thiab rau kev siv sab nraum zoov uas nws feem ntau raug dej noo. Txawm li cas los xij, EPDM tsis haum rau kev siv nrog roj thiab roj, vim nws o thiab poob nws cov khoom siv kho tshuab.

daim ntawv thov

Kev siv NBR thiab EPDM qhia txog nws cov yam ntxwv tshwj xeeb. NBR siv dav hauv cov tshuab roj, gaskets thiab seals hauv kev lag luam tsheb, nrog rau kev siv hauv kev lag luam xws li roj seals thiab hoses. Nws txoj kev tiv thaiv roj ua rau nws yog qhov tseem ceeb hauv cov chaw uas raug rau cov khoom siv roj av.

Tiam sis, EPDM zoo dua rau cov ntawv thov uas xav tau kev tiv thaiv huab cua, xws li ru tsev, cov qhov rai, thiab kev tiv thaiv huab cua ntawm lub tsheb. Nws tiv taus UV thiab ozone ua rau nws zoo tagnrho rau kev siv sab nraum zoov, ua kom nws siv tau ntev thiab ua haujlwm tau zoo txawm tias nyob rau hauv cov xwm txheej hnyav.

Hauv kev xaus lus, kev xaiv cov ntaub ntawv NBR thiab EPDM nyob ntawm seb xav tau daim ntawv thov tshwj xeeb li cas. NBR yog cov ntaub ntawv xaiv rau kev tiv taus roj thiab roj, thaum EPDM zoo tshaj plaws hauv cov ntawv thov uas xav tau kev tiv taus huab cua thiab ozone. Kev nkag siab txog qhov sib txawv ntawm cov khoom sib xyaw, cov yam ntxwv, kev tiv taus kub siab, kev tiv taus tshuaj lom neeg, thiab cov ntawv thov yuav pab cov chaw tsim khoom thiab cov kws ua haujlwm txiav txim siab thaum xaiv cov ntaub ntawv kom raug rau lawv cov kev xav tau.

Kingflex muaj ob qho tib si NBR thiab EPDM rwb thaiv tsev khoom. Yog tias koj muaj lus nug, thov koj xa lus nug rau pab neeg Kingflex txhua lub sijhawm.