TOP 5 Elastomers kwiGasket & iiAplikheyishini zokutywina
Ziziphi ii-elastomers?Eli gama livela kwi "elastic" -enye yezinto ezisisiseko zerabha.Amagama athi "irabha" kunye "neelastomer" asetyenziswa ngokufanayo ukubhekisa kwiipolymers ezineviscoelasticity-edla ngokubizwa ngokuba "yi-elasticity."Iimpawu zendalo ze-elastomers ziquka ukuguquguquka, ubude obuphezulu kunye nendibaniselwano yokomelela kunye nokumanzisa (ukudambisa yipropathi yerabha eyenza ukuba iguqule amandla omatshini kubushushu xa iphantsi kokuphambuka).Le seti yahlukileyo yeepropathi yenza ii-elastomers zibe yimathiriyeli efanelekileyo yeegaskets, itywina, i-isolate ors, kunye nokunye.
Ukutyhubela iminyaka, imveliso ye-elastomer iye yafuduka isuka kwirabha yendalo eveliswe kwi-latex yomthi ukuya kwiinguqu ezinobunjineli obuphezulu bokudibanisa irabha.Ekudaleni ezi zintlukwano, iipropati ezithile zifunyenwe ngoncedo lwezongezo ezinjengama-fillers okanye i-plasticizers okanye ngokuhlukahluka komxholo ngaphakathi kwesakhiwo se-copolymer.Ukuvela kwemveliso ye-elastomer idala intaphane yezinto ezinokwenzeka ze-elastomer ezinokuthi zenziwe ngobunjineli, zenziwe kwaye zenziwe zifumaneke ngaphakathi kwendawo yentengiso.
Ukuze ukhethe izinto ezifanelekileyo, umntu kufuneka aqale ahlolisise imigaqo eqhelekileyo yokusebenza kwe-elastomer kwi-gasket kunye ne-seal applications.Xa bekhetha imathiriyeli esebenzayo, iinjineli ngokufuthi kuya kufuneka zithathele ingqalelo intaphane yezinto.Iimeko zenkonzo ezifana noluhlu lwamaqondo obushushu okusebenza, iimeko zokusingqongileyo, ukudibana neekhemikhali, kunye neemfuno zoomatshini okanye zomzimba zonke kufuneka ziqwalaselwe ngononophelo.Ngokuxhomekeke kwisicelo, ezi meko zenkonzo zinokuchaphazela kakhulu ukusebenza kunye nexesha elilindelekileyo lokuphila kwe-elastomer gasket okanye itywina.
Sinale ngcinga engqondweni, makhe sijonge ezintlanu kwezonaelastomers zidla ngokusetyenziswa kwi-gasket kunye ne-seal applications.
1)I-Buna-N/Nitrile/NBR
Yonke imimiselo efanayo, le copolymer yerabha yokwenziwa kwe-acrylonitrile (ACN) kunye ne-butadiene, okanye i-rubber ye-Nitrile butadiene (NBR), lukhetho oludumileyo oluhlala lucaciswa xa i-petroli, i-oyile kunye / okanye igrisi ikhona.
Iimpawu eziphambili:
Ubushushu obuphezulu Uluhlu ukusuka ~ -54 ° C ukuya 121 ° C (-65 ° - 250 ° F).
Ukumelana kakuhle kakhulu neeoli, izinyibilikisi kunye namafutha.
Ukuxhathisa okulungileyo kwe-abrasion, ukuhamba okubandayo, ukuxhathisa ukukrazula.
Ikhethwa kwizicelo ezineNitrogen okanye iHelium.
Ukunganyangeki kakuhle kwi-UV, i-ozone, kunye nemozulu.
Ukunganyangeki kakuhle kwi-ketones kunye ne-chlorinated hydrocarbons.
Idla ngokusetyenziswa kwi:
I-Aerospace kunye ne-Automotive Fuel Handle Application
Iindleko ezizalanayo:
Phantsi ukuya phakathi
2)EPDM
Ukubunjwa kwe-EPDM kuqala nge-copolymerization ye-ethylene kunye nepropylene.I-monomer yesithathu, i-diene, yongezwa ukwenzela ukuba izinto eziphathekayo zibe ne-vulcanized ngesulfure.Ikhompawundi evunyiweyo yaziwa ngokuba yi-ethylene propylene diene monomer (EPDM).
Iimpawu eziphambili:
Ubushushu obuphezulu Uluhlu ukusuka ~ -59 ° C ukuya 149 ° C (-75 ° - 300 ° F).
Ubushushu obugqwesileyo, i-ozone kunye nokumelana nemozulu.
Ukuchasana kakuhle kwizinto ezimhlophe kunye ne-steam.
Iimpawu ezigqwesileyo zokufakelwa kombane.
Ukuchasana kakuhle ne-ketones, i-acids diluted eqhelekileyo, kunye ne-alkaline.
Ukunganyangeki kakuhle kwi-oyile, i-petroli kunye ne-kerosene.
Ukunganyangeki kakuhle kwi-aliphatic hydrocarbons, i-solvents halogenated, kunye ne-acids concentrated.
Amaxesha amaninzi asetyenziswa kwi:
Indawo ekugcinwa kuyo eFrijini/Kumagumbi abandayo
INkqubo yokuPholisa iMoto kunye neZicelo zokuThatha iMozulu
Iindleko ezizalanayo:
Phantsi – Phakathi
3) Neoprene
Intsapho ye-neoprene yeerubha zokwenziwa ziveliswa yi-polymerization ye-chloroprene kwaye yaziwa ngokuba yi-polychloroprene okanye i-Chloroprene (CR).
Iimpawu eziphambili:
Ubushushu obuphezulu Uluhlu ukusuka ~ -57 ° C ukuya 138 ° C (-70 ° - 280 ° F).
Impembelelo egqwesileyo, i-abrasion kunye neempawu zokumelana namadangatye.
Ukuxhathisa okulungileyo kweenyembezi kunye nesethi yoxinzelelo.
Ukuchasana kwamanzi okugqwesileyo.
Ukumelana kakuhle nokuvezwa okuphakathi kwe-ozone, i-UV, kunye nemozulu kunye nee-oyile, igrisi, kunye nezinyibilikisi ezithambileyo.
Ukunganyangeki kakuhle kwi-acids eqinile, i-solvents, i-esters, kunye ne-ketones.
Ukuxhathisa kakubi kwi-chlorinated, i-aromatics, kunye ne-nitro-hydrocarbons.
Amaxesha amaninzi asetyenziswa kwi:
Usetyenziso lweNdalo yasemanzini
Electronic
Iindleko ezizalanayo:
Phantsi
4) I-Silicone
Iirubha zeSilicone ziipolymer vinyl methyl polysiloxanes eziphezulu, ezichongwe njenge (VMQ), ezisebenza kakuhle kakhulu kwindawo eziyimingeni yobushushu.Ngenxa yobunyulu babo, iirubha ze-silicone zifaneleke ngokukodwa kwizicelo zococeko.
Iimpawu eziphambili:
Ubushushu obuphezulu Uluhlu ukusuka ~ -100 ° C ukuya 250 ° C (-148 ° - 482 ° F).
Ukumelana nobushushu obuphezulu.
I-UV ebalaseleyo, i-ozone kunye nokumelana nemozulu.
Ibonisa ukuguquguquka kweqondo lokushisa eliphantsi kwezixhobo ezidwelisiweyo.
Iipropati ezintle kakhulu ze-dielectric.
Amandla okuqina asezantsi kunye nokuxhathisa kweenyembezi.
Ukunganyangeki kakuhle kwi-solvents, i-oyile, kunye ne-acids concentrated.
Ukumelana kakubi nomphunga.
Amaxesha amaninzi asetyenziswa kwi:
Ukutya & iziselo izicelo
Izicelo zokusiNgqongileyo kwezamayeza (Ngaphandle kokuvalwa komphunga)
Iindleko ezizalanayo:
Phakathi – Phezulu
5) Fluoroelastomer/Viton®
IViton® fluoroelastomers zahlulwe phantsi kwegama elithi FKM.Olu didi lwe-elastomers lusapho olubandakanya ii-copolymers ze-hexafluoropropylene (HFP) kunye ne-vinylidene fluoride (VDF okanye i-VF2).
I-Terpolymers ye-tetrafluoroethylene (TFE), i-vinylidene fluoride (VDF) kunye ne-hexafluoropropylene (HFP) kunye ne-perfluoromethylvinylether (PMVE) equlethe izinto ezikhethekileyo zijongwa kumabakala aphezulu.
I-FKM yaziwa njengesisombululo sokhetho xa ubushushu obuphezulu kunye nokumelana neekhemikhali kuyadingeka.
Iimpawu eziphambili:
Ubushushu obuphezulu Uluhlu ukusuka ~ -30 ° C ukuya 315 ° C (-20 ° - 600 ° F).
Best ukumelana nobushushu obuphezulu.
I-UV ebalaseleyo, i-ozone kunye nokumelana nemozulu.
Ukunganyangeki kakuhle kwi-ketones, i-esters ephantsi ye-molecular weight.
Ukuchasana kakubi kotywala kunye ne-nitro-containing compounds
Ukuchasana kakubi kwiqondo lokushisa eliphantsi.
Amaxesha amaninzi asetyenziswa kwi:
Amanzi / SCUBA Ukutywina izicelo
Izicelo ze-Fuel ye-Automotive ene-High Concentrations ye-Biodiesel
Izicelo zokutywinwa kwe-Aerospace kwiNkxaso ye-Fuel, i-Lubricant, kunye ne-Hydraulic Systems
Iindleko ezizalanayo:
Phezulu
Ixesha lokuposa: Epreli-15-2020