Hauv cov ntawv thov kev lag luam, kev xaiv cov khoom siv yog ib qho tseem ceeb kom ntseeg tau tias muaj kev ua tau zoo, kev ua tau zoo, thiab tus nqi-zoo. Ob qho khoom siv hluavtaws hluavtaws yog cov roj hmab nitrile (NBR) thiab ethylene propylene diene monomer (EPDM). Txawm hais tias ob qho tib si cov ntaub ntawv muaj lawv tus kheej cov khoom tshwj xeeb thiab kev siv, kev nkag siab txog lawv qhov sib txawv yog qhov tseem ceeb rau kev xaiv cov khoom siv rau cov kev xav tau tshwj xeeb.
Cov khoom xyaw thiab cov khoom
NBR yog copolymer ua los ntawm acrylonitrile thiab butadiene. Cov ntsiab lus acrylonitrile hauv NBR feem ntau yog nruab nrab ntawm 18% thiab 50%, uas cuam tshuam rau nws cov roj tsis kam thiab cov khoom siv kho tshuab. NBR paub txog nws cov kev tiv thaiv zoo rau cov roj, roj thiab lwm yam tshuaj, ua rau nws yog ib qho khoom siv rau kev siv tsheb thiab kev lag luam uas feem ntau tuaj rau hauv kev sib cuag nrog cov tshuaj no. NBR kuj tseem muaj lub zog tensile zoo, kev puas tsuaj thiab kev hloov pauv, uas yog qhov tseem ceeb rau cov ntsaws ruaj ruaj, gaskets thiab hoses.
EPDM, ntawm qhov tod tes, yog terpolymer ua los ntawm ethylene, propylene, thiab diene tivthaiv. Qhov no tshwj xeeb muaj pes tsawg leeg muab EPDM huab cua tiv thaiv zoo heev, UV stability, thiab ozone kuj. EPDM yog tshwj xeeb tshaj yog haum rau kev siv sab nraum zoov xws li vov tsev, automotive weatherstripping, thiab cov ntsaws ruaj ruaj uas yuav tsum tau tiv taus ib puag ncig hnyav. Tsis tas li ntawd, EPDM tseem hloov tau ntawm qhov kub thiab txias, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv huab cua txias.
Thaum tshav kub kub kuj
Kev kub siab tiv thaiv yog lwm qhov sib txawv ntawm NBR thiab EPDM. NBR feem ntau ua tau zoo nyob rau hauv qhov kub ntawm -40 ° C mus rau 100 ° C (-40 ° F txog 212 ° F), nyob ntawm seb qhov kev tsim tshwj xeeb. Txawm li cas los xij, kev raug kub ntev ntev tuaj yeem ua rau degradation. Hauv qhov sib piv, EPDM tuaj yeem tiv taus qhov kub ntau dua, los ntawm -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 siab elasticity hauv huab cua.
Tshuaj tiv thaiv
Hais txog tshuaj tiv thaiv, NBR ua tau zoo nyob rau hauv ib puag ncig uas muaj roj thiab roj. Vim nws muaj peev xwm tiv taus cov khoom siv roj av, NBR feem ntau siv hauv kev lag luam tsheb rau roj hoses, O-rings, thiab cov ntsaws ruaj ruaj. Txawm li cas los xij, NBR muaj qhov tsis zoo rau cov kuab tshuaj polar, acids, lossis cov hauv paus, uas tuaj yeem ua rau nws o lossis degrade.
EPDM, ntawm qhov tod tes, tsis tshua muaj zog rau dej, chav dej, thiab ntau yam tshuaj, suav nrog cov kua qaub thiab cov hauv paus. Qhov no ua rau nws zoo tagnrho rau kev lag luam chemical thiab rau kev siv sab nraum zoov uas nws feem ntau raug rau cov dej noo. Txawm li cas los xij, EPDM tsis haum rau kev siv roj thiab roj, vim nws o thiab poob nws cov khoom siv kho tshuab.
daim ntawv thov
Daim ntawv thov ntawm NBR thiab EPDM qhia txog nws cov khoom tshwj xeeb. NBR yog dav siv nyob rau hauv roj systems, gaskets thiab seals nyob rau hauv lub automotive teb, raws li zoo raws li muaj kev siv xws li roj foob thiab hoses. Nws cov roj kuj ua rau nws yog ib qho tseem ceeb uas yuav tsum tau muaj nyob rau hauv ib puag ncig raug rau cov khoom siv roj av.
Hauv qhov sib piv, EPDM yog qhov zoo dua rau cov ntawv thov uas yuav tsum tau muaj huab cua tiv thaiv, xws li lub ru tsev, lub qhov rais ntsaws ruaj ruaj, thiab tsheb huab cua stripping. Nws tiv thaiv UV thiab ozone ua rau nws zoo tagnrho rau kev siv sab nraum zoov, ua kom nws lub neej ntev thiab kev ua haujlwm txawm tias nyob rau hauv qhov hnyav.
Hauv cov ntsiab lus, kev xaiv ntawm NBR thiab EPDM cov ntaub ntawv yog nyob ntawm cov kev xav tau tshwj xeeb ntawm daim ntawv thov. NBR yog cov khoom xaiv rau roj thiab roj tsis kam, thaum EPDM ua tau zoo hauv cov ntawv thov uas xav tau huab cua thiab ozone tsis kam. Kev nkag siab txog qhov sib txawv ntawm cov khoom sib txawv, cov khoom, qhov kub thiab txias tsis kam, tshuaj lom neeg tsis kam, thiab cov ntawv thov yuav pab cov tuam ntxhab thiab cov neeg tsim khoom txiav txim siab thaum xaiv cov khoom tsim nyog kom tau raws li 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 xav xa cov lus nug mus rau Kingflex pab neeg txhua lub sijhawm.
Post lub sij hawm: May-15-2025
