Ukuqonda umahluko phakathi kwe-EPDM (i-ethylene propylene diene monomer) kunye ne-NBR/PVC (irubha ye-nitrile butadiene/i-polyvinyl chloride) ibalulekile xa ukhetha imathiriyeli yezicelo ezahlukeneyo, ngakumbi kumashishini afana neemoto, ulwakhiwo kunye nokuvelisa. Zombini izixhobo zibonelela ngeempawu ezizodwa ezizenza zilungele ukusetyenziswa okuthile, kwaye ukuqonda lo mahluko kunokukunceda wenze izigqibo ezinolwazi.
Ukuqulunqwa kunye neempawu
I-Ethylene propylene diene monomer (EPDM) yirabha eyenziweyo eyaziwa ngokuxhathisa kwayo kubushushu, i-ozone, kunye nemozulu. Ukubunjwa kwayo kwe-ethylene, ipropylene, kunye ne-diene inika iipropati ezikhethekileyo. Ukunwebeka okugqwesileyo kwe-EPDM kunye nokukwazi ukumelana nobushushu obugqithisileyo buyenza ibe lolona khetho lufanelekileyo kwizicelo zangaphandle. Ikwayi-UV- kwaye iyamelana nokuguga, iyenza ibe lukhetho oludumileyo lokufulela iinwebu, itywina, kunye neegaskets.
Ngakolunye uhlangothi, i-NBR (irubha ye-nitrile butadiene) yirubha yokwenziwa ehlanganiswe ngokuyinhloko i-acrylonitrile kunye ne-butadiene. Le ndibaniselwano inika i-NBR egqwesileyo i-oyile kunye nokuxhathisa amafutha, iyenza ibe yeyona nto ikhethwayo kwimibhobho yamafutha, itywina, kunye neegaskets kushishino lweemoto. Nangona ingeyiyo irabha, i-PVC (i-polyvinyl chloride) isetyenziswa ngokubanzi kwi-thermoplastic enokumelana neekhemikhali ezilungileyo kunye nokuqina. Isetyenziswa ngokuqhelekileyo kwimibhobho, ukugquma kwentambo, kunye nezicelo ezahlukeneyo zokwakha.
Ukumelana nobushushu
Owona mahluko mkhulu phakathi kwe-EPDM kunye ne-NBR/PVC kukuxhathisa ubushushu. I-EPDM iyakwazi ukumelana namaqondo okushisa ukusuka kwi-40 ° F ukuya kwi-250 ° F (-40 ° C ukuya kwi-121 ° C), okwenza ukuba ifaneleke kwiindawo ezininzi. Ngokwahlukileyo, i-NBR inoluhlu olusezantsi lobushushu, ngokuqhelekileyo luqhuba kakuhle phakathi kwe-40 ° F kunye ne-212 ° F (-40 ° C ukuya kwi-100 ° C). Ngelixa iPVC isetyenziswa kakhulu, inoluhlu olulinganiselweyo lobushushu kwaye ithande ukuba brittle kumaqondo aphantsi.
Ukumelana nemichiza
Ngokubhekiselele kwimichiza yokumelana nekhemikhali, i-NBR igqamile ngokuxhathisa kwayo kwi-oyile, i-fuel, kunye nezinye iimveliso ezisekelwe kwi-petroleum. Oku kuyenza ibe lolona khetho lufanelekileyo kwizicelo kwimizi-mveliso yeemoto kunye ne-aerospace. Ngelixa i-EPDM ixhathisa kuluhlu olubanzi lweekhemikhali, iqhuba kakubi malunga nokuchasana neoli kunye namafutha. I-PVC, kwelinye icala, iyaxhathisa kuluhlu olubanzi lweekhemikhali kodwa inokuchatshazelwa zizinyibilikisi neeoyile ezithile.
I-EPDM kunye ne-NBR/PVC zinezicelo ezahlukeneyo kakhulu ngenxa yeempawu zazo ezizodwa. I-EPDM iqhele ukusetyenziswa kwiinkqubo zokufulela, i-automotive weatherstripping, kunye nokugquma kombane. Ukuqina kwayo kunye nokuchasana nezinto ezisingqongileyo kuyenza ibe lolona khetho lufanelekileyo kwizicelo zangaphandle. I-NBR isetyenziswa ikakhulu kushishino lweemoto kwi-fuel- kunye ne-oyile-resistant izicelo ezifana neegaskets, itywina, kunye nemibhobho. I-PVC, ngenxa yamandla ayo kunye nokuguquguquka kwayo, isetyenziswa ngokubanzi kwimibhobho yokwakha, izixhobo kunye nokugquma umbane.
Ukuqwalaselwa kweendleko
Iindleko yenye into ekufuneka uyiqwalasele xa ukhetha phakathi kwe-EPDM kunye ne-NBR/PVC. Ngokubanzi, i-EPDM ithande ukubiza kakhulu kune-NBR ngenxa yeempawu zayo eziphezulu kunye nokusebenza kwindawo enzima. I-PVC idla ngokuba yeyona ndlela ingabizi kakhulu, iyenza ibe lukhetho oludumileyo kwiiprojekthi ezijonga uhlahlo lwabiwo-mali.
Ekugqibeleni, ukhetho phakathi kwe-EPDM kunye ne-NBR / PVC izinto zixhomekeke kakhulu kwiimfuno ezithile zesicelo. I-EPDM ifanelekile kwizicelo zangaphandle ezifuna ukumelana nemozulu ebalaseleyo, ngelixa i-NBR iyeyona nto ikhethwayo yokumelana ne-oyile kunye ne-fuel kwizicelo zeemoto. I-PVC inikezela ngeendlela ezahlukeneyo kunye nokusebenza kakuhle, ukuhlangabezana noluhlu olubanzi lweemfuno zokwakha. Ukuqonda lo mahluko kunokunceda iinjineli, abavelisi, kunye nabathengi benze izigqibo ezinolwazi ezilungele iimfuno zabo zeprojekthi.
Ixesha lokuposa: Aug-15-2025
