Kumvetsetsa kusiyana pakati pa EPDM (ethylene propylene diene monomer) ndi NBR/PVC (nitrile butadiene raba/polyvinyl chloride) n'kofunika kwambiri posankha zipangizo zosiyanasiyana, makamaka m'mafakitale monga magalimoto, zomangamanga, ndi kupanga. Zida zonsezi zimapereka mawonekedwe apadera omwe amawapangitsa kukhala oyenera kugwiritsidwa ntchito mwapadera, ndipo kumvetsetsa kusiyana kumeneku kungakuthandizeni kupanga zisankho mwanzeru.
Mapangidwe ndi katundu
Ethylene propylene diene monomer (EPDM) ndi mphira wopangira womwe umadziwika chifukwa chokana kwambiri kutentha, ozoni, ndi nyengo. Mapangidwe ake a ethylene, propylene, ndi diene amamupatsa zinthu zapadera. Kukhazikika kwabwino kwa EPDM ndikutha kupirira kutentha kwambiri kumapangitsa kuti ikhale chisankho chabwino pakugwiritsa ntchito panja. Ilinso ndi UV- komanso yolimbana ndi ukalamba, ndikupangitsa kuti ikhale chisankho chodziwika bwino padenga, zisindikizo, ndi ma gaskets.
Kumbali inayi, NBR (rabara ya nitrile butadiene) ndi mphira wopangira wopangidwa makamaka ndi acrylonitrile ndi butadiene. Kuphatikiza kumeneku kumapatsa NBR mafuta abwino kwambiri komanso kukana kwamafuta, kupangitsa kuti ikhale chinthu chokondedwa pamapaipi amafuta, zisindikizo, ndi ma gaskets pamsika wamagalimoto. Ngakhale si mphira, PVC (polyvinyl chloride) ndi thermoplastic yogwiritsidwa ntchito kwambiri yokhala ndi kukana kwamankhwala komanso kulimba. Amagwiritsidwa ntchito popanga mapaipi, kutsekereza chingwe, ndi ntchito zosiyanasiyana zomanga.
Kutentha kukana
Chimodzi mwazosiyana kwambiri pakati pa EPDM ndi NBR/PVC ndi kukana kwawo kutentha. EPDM imatha kupirira kutentha koyambira -40 ° F mpaka 250 ° F (-40 ° C mpaka 121 ° C), ndikupangitsa kuti ikhale yoyenera kumadera osiyanasiyana. Mosiyana ndi izi, NBR ili ndi kutentha kochepa, komwe kumachita bwino pakati pa -40 ° F ndi 212 ° F (-40 ° C mpaka 100 ° C). Ngakhale kuti PVC imagwiritsidwa ntchito kwambiri, imakhala ndi kutentha pang'ono ndipo imakonda kukhala brittle pa kutentha kochepa.
Chemical resistance
Pankhani ya kukana kwa mankhwala, NBR imadziwika kwambiri chifukwa chokana mafuta, mafuta, ndi zinthu zina zopangira mafuta. Izi zimapangitsa kukhala chisankho chabwino pamafakitale amagalimoto ndi ndege. Ngakhale kuti EPDM imagonjetsedwa ndi mankhwala osiyanasiyana, imagwira ntchito bwino polimbana ndi mafuta ndi mafuta. Komano, PVC imalimbana ndi mankhwala osiyanasiyana koma ingakhudzidwe ndi zosungunulira ndi mafuta ena.
EPDM ndi NBR/PVC ali ndi ntchito zosiyanasiyana chifukwa cha mawonekedwe awo apadera. EPDM imagwiritsidwa ntchito kwambiri pamakina ofolera, kuwongolera nyengo yamagalimoto, komanso kutsekereza magetsi. Kukhazikika kwake komanso kukana zinthu zachilengedwe kumapangitsa kukhala chisankho choyenera kwa ntchito zakunja. NBR imagwiritsidwa ntchito kwambiri m'magalimoto opangira mafuta komanso osamva mafuta monga ma gaskets, seals, ndi hoses. PVC, chifukwa cha mphamvu zake komanso kusinthasintha kwake, imagwiritsidwa ntchito kwambiri pomanga mapaipi, zopangira, ndi kutchinjiriza magetsi.
Kuganizira za Mtengo
Mtengo ndi chinthu china choyenera kuganizira posankha pakati pa EPDM ndi NBR/PVC. Nthawi zambiri, EPDM imakonda kukhala yokwera mtengo kuposa NBR chifukwa chapamwamba komanso magwiridwe antchito m'malo ovuta. PVC nthawi zambiri ndiyo njira yotsika mtengo kwambiri, ndikupangitsa kuti ikhale chisankho chodziwika bwino pama projekiti omwe amaganizira za bajeti.
Pamapeto pake, kusankha pakati pa EPDM ndi zida za NBR/PVC kumadalira kwambiri zofunikira pakugwiritsa ntchito. EPDM ndiyabwino pamapulogalamu akunja omwe amafunikira kukana kwanyengo, pomwe NBR ndiye chinthu chomwe chimakondedwa kwambiri pakukana kwamafuta ndi mafuta pamagalimoto. PVC imapereka kusinthasintha komanso kutsika mtengo, kukwaniritsa zosowa zosiyanasiyana zomanga. Kumvetsetsa kusiyana kumeneku kungathandize mainjiniya, opanga, ndi ogula kupanga zisankho zolongosoka zogwirizana ndi zosowa zawo za polojekiti.
Nthawi yotumiza: Aug-15-2025
