Kumvetsetsa kusiyana pakati pa EPDM (ethylene propylene diene monomer) ndi NBR/PVC (nitrile butadiene rabara/polyvinyl chloride) ndikofunikira kwambiri posankha zipangizo zogwiritsidwa ntchito zosiyanasiyana, makamaka m'mafakitale monga magalimoto, zomangamanga, ndi kupanga. Zipangizo zonsezi zimakhala ndi zinthu zapadera zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito mwanjira inayake, ndipo kumvetsetsa kusiyana kumeneku kungakuthandizeni kupanga zisankho mwanzeru.
Kapangidwe ndi katundu
Ethylene propylene diene monomer (EPDM) ndi rabala yopangidwa ndi anthu yomwe imadziwika kuti imalimbana bwino ndi kutentha, ozone, komanso kuzizira. Kapangidwe kake ka ethylene, propylene, ndi diene kamapatsa mphamvu zapadera. Kulimba kwa EPDM komanso kuthekera kwake kupirira kutentha kwambiri kumapangitsa kuti ikhale chisankho chabwino kwambiri chogwiritsidwa ntchito panja. Komanso imapirira UV komanso ukalamba, zomwe zimapangitsa kuti ikhale chisankho chodziwika bwino cha nembanemba za denga, zisindikizo, ndi ma gasket.
Kumbali ina, NBR (nitrile butadiene rabara) ndi rabara yopangidwa ndi acrylonitrile ndi butadiene. Kuphatikiza kumeneku kumapatsa NBR mphamvu yabwino kwambiri yolimbana ndi mafuta ndi mafuta, zomwe zimapangitsa kuti ikhale chinthu chodziwika bwino pa mapayipi amafuta, zomatira, ndi ma gaskets mumakampani opanga magalimoto. Ngakhale si rabara, PVC (polyvinyl chloride) ndi thermoplastic yomwe imagwiritsidwa ntchito kwambiri komanso yolimba komanso yolimba. Imagwiritsidwa ntchito kwambiri m'mapaipi, zotchingira mawaya, ndi ntchito zosiyanasiyana zomangira.
Kukana kutentha
Chimodzi mwa kusiyana kwakukulu pakati pa EPDM ndi NBR/PVC ndi kukana kwawo kutentha. EPDM nthawi zambiri imatha kupirira kutentha kuyambira -40°F mpaka 250°F (-40°C mpaka 121°C), zomwe zimapangitsa kuti ikhale yoyenera m'malo osiyanasiyana. Mosiyana ndi zimenezi, NBR ili ndi kutentha kochepa, nthawi zambiri imagwira ntchito bwino pakati pa -40°F ndi 212°F (-40°C mpaka 100°C). Ngakhale kuti PVC imagwiritsidwa ntchito kwambiri, imakhala ndi kutentha kochepa ndipo nthawi zambiri imakhala yofooka ikatentha pang'ono.
Kukana mankhwala
Ponena za kukana mankhwala, NBR imadziwika ndi kukana kwake mafuta, mafuta, ndi zinthu zina zopangidwa ndi mafuta. Izi zimapangitsa kuti ikhale chisankho chabwino kwambiri chogwiritsidwa ntchito m'mafakitale a magalimoto ndi ndege. Ngakhale kuti EPDM imakana mankhwala osiyanasiyana, sichita bwino pankhani ya kukana mafuta ndi mafuta. Koma PVC, imakana mankhwala osiyanasiyana koma ingakhudzidwe ndi zinthu zina zosungunulira ndi mafuta.
EPDM ndi NBR/PVC zili ndi ntchito zosiyanasiyana chifukwa cha makhalidwe awo apadera. EPDM imagwiritsidwa ntchito kwambiri pakupanga denga, kuchotsa zinthu m'magalimoto, komanso kutchinjiriza magetsi. Kulimba kwake komanso kukana zinthu zachilengedwe zimapangitsa kuti ikhale chisankho chabwino kwambiri pa ntchito zakunja. NBR imagwiritsidwa ntchito makamaka mumakampani opanga magalimoto pazinthu zosagwiritsa ntchito mafuta ndi mafuta monga ma gasket, zisindikizo, ndi mapayipi. PVC, chifukwa cha mphamvu zake komanso kusinthasintha kwake, imagwiritsidwa ntchito kwambiri popanga mapaipi, zolumikizira, ndi kutchinjiriza magetsi.
Zoganizira za Mtengo
Mtengo ndi chinthu china choyenera kuganizira posankha pakati pa EPDM ndi NBR/PVC. Kawirikawiri, EPDM imakhala yokwera mtengo kuposa NBR chifukwa cha makhalidwe ake abwino komanso magwiridwe antchito ake m'malo ovuta. PVC nthawi zambiri ndiyo njira yotsika mtengo kwambiri, zomwe zimapangitsa kuti ikhale chisankho chodziwika bwino pamapulojekiti omwe amaganizira bajeti.
Pomaliza, kusankha pakati pa zipangizo za EPDM ndi NBR/PVC kumadalira kwambiri zofunikira za pulogalamuyo. EPDM ndi yabwino kwambiri pa ntchito zakunja zomwe zimafuna kupirira bwino nyengo, pomwe NBR ndiye chinthu chomwe chimakondedwa kwambiri pakugwiritsa ntchito mafuta ndi mafuta m'magalimoto. PVC imapereka kusinthasintha komanso kugwiritsa ntchito ndalama moyenera, kukwaniritsa zosowa zosiyanasiyana zomangira. Kumvetsetsa kusiyana kumeneku kungathandize mainjiniya, opanga, ndi ogula kupanga zisankho zodziwikiratu zogwirizana ndi zosowa zawo za polojekiti.
Nthawi yotumizira: Ogasiti-15-2025
