TOP 5 Elastomers Kwa Gasket & Seal Application
Kodi ma elastomer ndi chiyani? Mawuwa amachokera ku "elastic" - chimodzi mwa zinthu zofunika kwambiri za rabara. Mawu oti "rabala" ndi "elastomer" amagwiritsidwa ntchito mosiyanasiyana kutanthauza ma polima okhala ndi viscoelasticity - omwe nthawi zambiri amatchedwa "elasticity." Makhalidwe achilengedwe a elastomers amaphatikizapo kusinthasintha, kutalika kwakukulu komanso kuphatikiza kulimba ndi kunyowa (kunyowa ndi chinthu cha mphira chomwe chimapangitsa kuti chisinthe mphamvu yamakina kuti itenthe pamene itayika). Katundu wapaderawa amapangitsa ma elastomer kukhala zinthu zabwino zopangira ma gaskets, seal, isolate ors, ndi zina zotero.
Kwa zaka zambiri, kupanga elastomer kwasintha kuchoka ku mphira wachilengedwe wopangidwa kuchokera kumtengo wa latex kupita kumitundu yopangidwa mwaluso kwambiri ya rabara. Popanga kusiyanasiyana kumeneku, zinthu zinazake zimapezedwa mothandizidwa ndi zowonjezera monga fillers kapena plasticizers kapena mosiyanasiyana ma ratios mkati mwa copolymer. Kusinthika kwa kupanga elastomer kumapanga mwayi wochulukirachulukira wa elastomer womwe ungathe kupangidwa, kupangidwa ndi kupezeka pamsika.
Kuti musankhe zinthu zoyenera, munthu ayenera kuyang'ana kaye njira zomwe zimagwiritsidwa ntchito ndi elastomer mu gasket ndi seal application. Posankha zinthu zogwira mtima, mainjiniya nthawi zambiri amayenera kuganizira zinthu zingapo. Zinthu zogwirira ntchito monga kutentha kwa magwiridwe antchito, momwe chilengedwe, kukhudzana ndi mankhwala, ndi zofunikira zamakina kapena zakuthupi zonse ziyenera kuganiziridwa bwino. Kutengera kugwiritsa ntchito, izi zitha kukhudza kwambiri magwiridwe antchito komanso kutalika kwa moyo wa elastomer gasket kapena chisindikizo.
Ndi malingaliro awa, tiyeni tiwone ma elastomer asanu omwe amagwiritsidwa ntchito kwambiri pakugwiritsa ntchito gasket ndi seal.
1)Buna-N/Nitrile/NBR
Mawu onse ofanana, mphira wopangidwa ndi acrylonitrile (ACN) ndi butadiene, kapena Nitrile butadiene rubber (NBR), ndi chisankho chodziwika chomwe nthawi zambiri chimatchulidwa pamene mafuta, mafuta ndi / kapena mafuta alipo.
Katundu Waukulu:
Kutentha Kwambiri Kusiyanasiyana kuchokera ~ -54°C kufika 121°C (-65° – 250°F).
Zabwino kwambiri kukana mafuta, zosungunulira ndi mafuta.
Kukana bwino kwa abrasion, kuzizira kozizira, kukana misozi.
Zokonda pakugwiritsa ntchito nayitrogeni kapena Helium.
Kulephera kukana kwa UV, ozoni, ndi nyengo.
Kulephera kukana matupi a ketone ndi ma chlorinated hydrocarbons.
Nthawi zambiri amagwiritsidwa ntchito mu:
Ma Aerospace & Automotive Fuel Handling Applications
Ndalama Zofananira:
Otsika mpaka Pakatikati
2) EPDM
Kupanga kwa EPDM kumayamba ndi copolymerization ya ethylene ndi propylene. Monomer yachitatu, diene, imawonjezeredwa kuti zinthuzo ziwonongeke ndi sulfure. Gulu loperekedwa limadziwika kuti ethylene propylene diene monomer (EPDM).
Katundu Waukulu:
Kutentha Kwakukulu Kusiyanasiyana kuchokera ~ -59°C mpaka 149°C (-75° – 300°F).
Kutentha kwabwino kwambiri, ozoni komanso kukana kwanyengo.
Kukana bwino kwa zinthu za polar ndi nthunzi.
Wabwino magetsi insulating katundu.
Kukana bwino kwa matupi a ketone, ma acid wamba ochepetsedwa, ndi alkaline.
Kulephera kukana mafuta, petulo, ndi palafini.
Kulephera kukana kwa aliphatic hydrocarbons, zosungunulira za halogenated, ndi ma acid ambiri.
Nthawi zambiri amagwiritsidwa ntchito mu:
Malo Okhala mufiriji/Zipinda Zozizira
Makina Ozizirira Magalimoto ndi Ntchito Zowongolera Nyengo
Ndalama Zofananira:
Pang'ono - Wapakati
3) Neoprene
Banja la neoprene la ma rubber opangira amapangidwa ndi polymerization ya chloroprene ndipo amadziwikanso kuti polychloroprene kapena Chloroprene (CR).
Katundu Waukulu:
Kutentha Kwambiri Kusiyanasiyana kuchokera ~ -57°C mpaka 138°C (-70° – 280°F).
Zabwino kwambiri, abrasion ndi katundu wosamva moto.
Kukaniza kwabwino kwa misozi ndi compression set.
Zabwino kwambiri kukana madzi.
Kukana kwabwino pakuyatsidwa pang'ono ndi ozoni, UV, ndi nyengo komanso mafuta, mafuta, ndi zosungunulira zofatsa.
Kulephera kukana kwamphamvu zidulo, zosungunulira, esters, ndi ketoni.
Kulephera kukana kwa chlorinated, zonunkhira, ndi nitro-hydrocarbons.
Nthawi zambiri amagwiritsidwa ntchito mu:
Ntchito Zachilengedwe Zamadzi
Zamagetsi
Ndalama Zofananira:
Zochepa
4) Silicone
Ma mphira a silicone ndi apamwamba-polymer vinyl methyl polysiloxanes, otchedwa (VMQ), omwe amachita bwino kwambiri m'malo ovuta kutentha. Chifukwa cha chiyero chawo, mphira za silicone ndizoyenera kwambiri pazaukhondo.
Katundu Waukulu:
Kutentha Kwakukulu Kusiyanasiyana kuchokera ~ -100°C mpaka 250°C (-148° – 482°F).
Zabwino kwambiri kutentha kukana.
Ubwino wa UV, ozoni komanso kukana kwanyengo.
Kuwonetsa kusinthasintha kwapamwamba kwa kutentha kwa zinthu zomwe zatchulidwa.
Zabwino kwambiri za dielectric.
Kutsika kwamphamvu kwamphamvu komanso kukana misozi.
Kusakanizidwa bwino ndi zosungunulira, mafuta, ndi zidulo zokhazikika.
Kulephera kukana nthunzi.
Nthawi zambiri amagwiritsidwa ntchito mu:
Zakudya & Chakumwa Mapulogalamu
Ntchito Zachilengedwe Zamankhwala (Kupatula kutsekereza kwa nthunzi)
Ndalama Zofananira:
Wapakati - Wapamwamba
5) Fluoroelastomer/Viton®
Viton® fluoroelastomers amagawidwa m'magulu a FKM. Kalasi iyi ya elastomer ndi banja lopangidwa ndi ma copolymer a hexafluoropropylene (HFP) ndi vinylidene fluoride (VDF kapena VF2).
Ma Terpolymers a tetrafluoroethylene (TFE), vinylidene fluoride (VDF) ndi hexafluoropropylene (HFP) komanso perfluoromethylvinylether (PMVE) okhala ndi ukadaulo amawonedwa m'makalasi apamwamba.
FKM imadziwika ngati yankho la chisankho pakafunika kutentha kwambiri komanso kukana mankhwala.
Katundu Waukulu:
Kutentha Kwambiri Kusiyanasiyana kuchokera ~ -30°C mpaka 315°C (-20° – 600°F).
Best kutentha kukana.
Ubwino wa UV, ozoni komanso kukana kwanyengo.
Kulephera kukana kwa matupi a ketoni, kuchepa kwa maselo olemera esters.
Kusakanizidwa bwino kwa mowa ndi mankhwala okhala ndi nitro
Osauka kukana kutentha otsika.
Nthawi zambiri amagwiritsidwa ntchito mu:
Mapulogalamu Osindikiza Amadzi / SCUBA
Kugwiritsa Ntchito Mafuta Agalimoto Okhala Ndi Magulu Apamwamba a Biodiesel
Aerospace Seal Applications Pothandizira Mafuta, Lubricant, ndi Hydraulic Systems
Ndalama Zofananira:
Wapamwamba
Nthawi yotumiza: Apr-15-2020