TOP 5 Elastomers For Gasket & Seal Izicelo
Yini ama-elastomers? Igama lisuselwa ku-"elastic" -enye yezinto eziyisisekelo zenjoloba. Amagama athi “irabha” nelithi “elastomer” asetshenziswa ngokushintshana ukuze abhekisele kuma-polymer ane-viscoelasticity-evame ukubizwa ngokuthi “i-elasticity.” Izici ezingokwemvelo zama-elastomers zihlanganisa ukuguquguquka, ukuphakama okuphezulu kanye nenhlanganisela yokuqina kanye nokumanzisa (i-damping iyimpahla yenjoloba eyenza ukuthi iguqule amandla emishini ekushiseni lapho ingaphansi kokuchezuka). Le sethi yezakhiwo eyingqayizivele yenza ama-elastomer abe yimpahla efanelekile yama-gaskets, seal, isolat ors, nokunye okunjalo.
Ngokuhamba kweminyaka, ukukhiqizwa kwe-elastomer kuye kwasuka kunjoloba yemvelo ekhiqizwe isuka esihlahleni i-latex yaya ezinhlobonhlobo zenhlanganisela yenjoloba ethuthuke kakhulu. Ekudaleni lokhu kuhlukahluka, izakhiwo ezithile zitholwa ngosizo lwezithako ezifana nama-fillers noma ama-plasticizers noma ngokuhlukahluka kwezilinganiso zokuqukethwe ngaphakathi kwesakhiwo se-copolymer. Ukuvela kokukhiqizwa kwe-elastomer kudala inqwaba yamathuba e-elastomer angakhiwa, akhiqizwe futhi enziwe atholakale ngaphakathi kwemakethe.
Ukuze ukhethe into efanele, umuntu kufanele aqale ahlole indlela evamile yokusebenza kwe-elastomer ku-gasket kanye ne-seal application. Lapho bekhetha impahla ephumelelayo, onjiniyela ngokuvamile kuyodingeka bacabangele inqwaba yezinto. Izimo zesevisi ezifana nebanga lokushisa lokusebenza, izimo zemvelo, ukuthintana namakhemikhali, kanye nezidingo zemishini noma zomzimba zonke zidinga ukucatshangelwa ngokucophelela. Ngokuya ngohlelo lokusebenza, lezi zimo zesevisi zingathinta kakhulu ukusebenza kanye neminyaka yokuphila kwe-elastomer gasket noma uphawu.
Sinale mibono engqondweni, ake sihlole ama-elastomers amahlanu asetshenziswa kakhulu ukuthola i-gasket ne-seal applications.
1)I-Buna-N/Nitrile/NBR
Wonke amagama afanayo, le copolymer yerabha yokwenziwa ye-acrylonitrile (ACN) kanye ne-butadiene, noma irabha ye-Nitrile butadiene (NBR), iyisinqumo esidumile esivame ukucaciswa uma kukhona uphethiloli, uwoyela kanye/noma amagrisi.
Izakhiwo Eziyinhloko:
Ibanga Lezinga Lokushisa Eliphezulu lisuka ku-~ -54°C kuya ku-121°C (-65° – 250°F).
Ukumelana kahle kakhulu nowoyela, ama-solvents kanye namafutha.
Ukumelana okuhle nokuhuzuka, ukugeleza okubandayo, ukumelana nezinyembezi.
Kuncanyelwa ukusetshenziswa ngeNitrogen noma iHelium.
Ukumelana ne-UV, i-ozone, nesimo sezulu.
Ukungazweli kahle kuma-ketones nama-hydrocarbons ane-chlorine.
Okuvame ukusetshenziswa kakhulu ku:
I-Aerospace & Izicelo Zokuphatha Amafutha Ezimoto
Izindleko Ezihlobene:
Kuphansi kuya kokumaphakathi
2) I-EPDM
Ukwakhiwa kwe-EPDM kuqala nge-copolymerization ye-ethylene ne-propylene. I-monomer yesithathu, i-diene, yengezwa ukuze impahla ifakwe sulfure. Inhlanganisela ekhiqiziwe yaziwa ngokuthi i-ethylene propylene diene monomer (EPDM).
Izakhiwo Eziyinhloko:
Ibanga Lezinga Lokushisa Eliphezulu lisuka ku-~ -59°C kuya ku-149°C (-75° – 300°F).
Ukushisa okuhle kakhulu, i-ozone kanye nokumelana nesimo sezulu.
Ukumelana kahle nezinto ezishisayo kanye ne-steam.
Izakhiwo ezinhle kakhulu zokuvikela ugesi.
Ukumelana kahle nama-ketones, ama-asidi ahlanjululwe ajwayelekile, nama-alkaline.
Ukumelana kahle nowoyela, uphethiloli, nophalafini.
Ukungazweli kahle kuma-aliphatic hydrocarbons, ama-halogenated solvents, nama-acids agxilile.
Okuvame ukusetshenziswa kakhulu ku:
Izindawo Eziqandisiwe/Zamakamelo Abandayo
I-Automotive Cooling System kanye Nezicelo Zokuhlubula Isimo Sezulu
Izindleko Ezihlobene:
Phansi – Phakathi
3) Neoprene
Umndeni we-neoprene wamarabha okwenziwa akhiqizwa yi-polymerization ye-chloroprene futhi yaziwa nangokuthi i-polychloroprene noma i-Chloroprene (CR).
Izakhiwo Eziyinhloko:
Ibanga Lezinga Lokushisa Eliphezulu lisuka ku-~ -57°C kuya ku-138°C (-70° – 280°F).
Umthelela omuhle kakhulu, ukuhuzuka kanye nezakhiwo ezimelana namalangabi.
Ukumelana okuhle kwezinyembezi kanye nesethi yokucindezela.
Ukumelana namanzi okuhle kakhulu.
Ukumelana okuhle nokuchayeka okusesilinganisweni ku-ozone, i-UV, nesimo sezulu kanye namafutha, amagrisi, nezinyibilikisi ezithambile.
Ukungazweli kahle kuma-asidi aqinile, ama-solvents, ama-ester, nama-ketones.
Ukumelana okuphansi kwe-chlorinated, iphunga elimnandi, ne-nitro-hydrocarbons.
Okuvame ukusetshenziswa kakhulu ku:
Izicelo Zemvelo Yasemanzini
I-elekthronikhi
Izindleko Ezihlobene:
Phansi
4) I-Silicone
Amarabha e-Silicone angama-polymer vinyl methyl polysiloxanes aphezulu, aqokwe njenge-(VMQ), enza kahle kakhulu ezindaweni ezishisayo eziyinselele. Ngenxa yokuhlanzeka kwawo, amarabha e-silicone afaneleka ngokukhethekile ekusetshenzisweni kwenhlanzeko.
Izakhiwo Eziyinhloko:
Ibanga Lezinga Lokushisa Eliphezulu lisuka ku-~ -100°C kuya ku-250°C (-148° – 482°F).
Ukumelana nokushisa okuphezulu okuhle kakhulu.
I-UV evelele, i-ozone kanye nokumelana nesimo sezulu.
Ibonisa ukuguquguquka kwezinga lokushisa eliphansi okungcono kakhulu kwezinto ezisohlwini.
Izakhiwo ezinhle kakhulu ze-dielectric.
Amandla okuqineka aphansi kanye nokumelana nezinyembezi.
Ukungazweli kahle kumakhemikhali, amafutha, nama-asidi agxilile.
Ukungazweli kahle ku-steam.
Okuvame ukusetshenziswa kakhulu ku:
Izicelo Zokudla Neziphuzo
Izicelo Zemvelo Yezemithi (Ngaphandle kokuvala inzalo ngesitimu)
Izindleko Ezihlobene:
Okulingene – Phezulu
5) I-Fluoroelastomer/Viton®
Ama-Viton® fluoroelastomers ahlukaniswe ngaphansi kwegama elithi FKM. Leli klasi lama-elastomers liwumndeni owakhiwe ama-copolymers e-hexafluoropropylene (HFP) kanye ne-vinylidene fluoride (VDF noma i-VF2).
Ama-terpolymers e-tetrafluoroethylene (TFE), i-vinylidene fluoride (VDF) ne-hexafluoropropylene (HFP) kanye ne-perfluoromethylvinylether (PMVE) aqukethe amakhono abonwa emabangeni athuthukile.
I-FKM yaziwa njengesixazululo sokuzikhethela lapho izinga lokushisa eliphezulu kanye nokumelana namakhemikhali kuyadingeka.
Izakhiwo Eziyinhloko:
Ibanga Lezinga Lokushisa Eliphezulu lisuka ku-~ -30°C kuya ku-315°C (-20° – 600°F).
Ukumelana nokushisa okuphezulu kakhulu.
I-UV evelele, i-ozone kanye nokumelana nesimo sezulu.
Ukungazweli kahle kuma-ketones, ama-esters esisindo samangqamuzana aphansi.
Ukungazweli kahle kotshwala nezinhlanganisela ezine-nitro
Ukumelana okuphansi kwezinga lokushisa eliphansi.
Okuvame ukusetshenziswa kakhulu ku:
Izicelo zokuvala uphawu ze-Aquatic/SCUBA
Izicelo Zezimoto Zezimoto Ezinokugxila Okuphezulu kwe-Biodiesel
I-Aerospace Seal Applications Ekusekelweni Kwezibaseli, Izinto Zokuthambisa, kanye Nezinhlelo Ze-Hydraulic
Izindleko Ezihlobene:
Phezulu
Isikhathi sokuthumela: Apr-15-2020