TOP 5 Elastomers Bakeng sa Gasket & Seal Application
Li-elastomer ke eng?Lentsoe lena le tsoa ho "elastic" - e 'ngoe ea lintho tsa mantlha tsa rabara.Mantsoe a reng "rabara" le "elastomer" a sebelisoa ka mokhoa o ts'oanang ho bua ka lipolymer tse nang le viscoelasticity - eo hangata e bitsoang "elasticity."Thepa ea tlhaho ea li-elastomers e kenyelletsa ho feto-fetoha ha maemo, bolelele bo phahameng le motsoako oa ho tiea le ho phophoma (damping ke thepa ea rabara e etsang hore e fetole matla a mochini ho futhumatsa ha a kheloha).Sehlopha sena se ikhethileng sa thepa se etsa hore li-elastomer e be thepa e loketseng bakeng sa likhase, litiiso, li-isolate, joalo-joalo.
Ho theosa le lilemo, tlhahiso ea elastomer e tlohile ho tloha ho rabara ea tlhaho e hlahisitsoeng ho tloha sefateng sa latex ho ea ho mefuta e fapaneng ea moetso oa rabara.Ha ho etsoa liphapang tsena, thepa e khethehileng e fumanoa ka thuso ea li-additives tse kang li-fillers kapa li-plasticizers kapa ka mefuta e fapaneng ea likarohano tsa dikahare ka har'a sebopeho sa copolymer.Phetoho ea tlhahiso ea elastomer e theha menyetla e mengata ea elastomer e ka etsoang, ea etsoa le ho fumaneha ka har'a 'maraka.
E le hore u khethe thepa e nepahetseng, motho o lokela ho qala ka ho hlahloba mekhoa e tloaelehileng ea ts'ebetso ea elastomer ka gasket le lisebelisoa tsa tiiso.Ha ba khetha thepa e sebetsang, hangata baenjiniere ba tla tlameha ho nahana ka lintlha tse ngata.Maemo a ts'ebeletso joalo ka mefuta ea mocheso oa ts'ebetso, maemo a tikoloho, ho kopana le lik'hemik'hale, le litlhoko tsa mochini kapa tsa 'mele kaofela li hloka ho nahanoa ka hloko.Ho latela ts'ebeliso, maemo ana a ts'ebeletso a ka ama ts'ebetso haholo le tebello ea bophelo ea gasket ea elastomer kapa tiiso.
Re nahanne ka maikutlo ana, ha re hlahlobeng li-elastomer tse hlano tse sebelisoang haholo bakeng sa tšebeliso ea gasket le seal.
1)Buna-N/Nitrile/NBR
Mantsoe ohle a tšoanang, copolymer ena ea rabara ea maiketsetso ea acrylonitrile (ACN) le butadiene, kapa rabara ea Nitrile butadiene (NBR), ke khetho e tloaelehileng eo hangata e hlalosoang ha peterole, oli le / kapa li-grease li le teng.
Thepa ea mantlha:
Mocheso o Moholo Range ho tloha ~ -54°C ho ea ho 121°C (-65° – 250°F).
Ho hanyetsa hantle haholo oli, solvents le mafura.
Khanyetso e ntle ea abrasion, phallo e batang, ho hanyetsa meokho.
E ratoa bakeng sa lisebelisoa tse nang le Nitrogen kapa Helium.
Khanyetso e mpe ho UV, ozone le boemo ba leholimo.
Khanyetso e mpe ho li-ketone le li-hydrocarbon tse chlorinated.
Hangata e sebelisoa ho:
Aerospace & Automotive Fuel Horning Applications
Litšenyehelo tse Bapehang:
Tlase ho ea ho Maemo
2) EPDM
Sebopeho sa EPDM se qala ka copolymerization ea ethylene le propylene.Ho eketsoa monoma ea boraro, e leng diene, e le hore thepa e ka senyeha ka sebabole.Motsoako o hlahisitsoeng o tsejoa e le ethylene propylene diene monomer (EPDM).
Thepa ea mantlha:
Mocheso o Moholo Range ho tloha ~ -59°C ho isa ho 149°C (-75° – 300°F).
Mocheso o babatsehang, ozone le ho hanyetsa boemo ba leholimo.
Ho hanyetsa hantle lintho tsa polar le mouoane.
Lintho tse ntle tsa insulating tsa motlakase.
Ho hanyetsa hantle li-ketone, li-acid tse tloaelehileng tse hlapolotsoeng, le alkaline.
Ho hanyetsa oli, peterole le parafine.
Khanyetso e mpe ho aliphatic hydrocarbons, solvents halogenated, le concentrated acids.
Hangata e sebelisoa ho:
Libaka tse Sehatsetsing/ tse batang
Sistimi ea Pholiso ea Likoloi le Likopo tsa ho Hlakola Boemo ba Leholimo
Litšenyehelo tse Bapehang:
Tlase – E itekanetseng
3) Neoprene
Lelapa la neoprene la liraba tsa maiketsetso le hlahisoa ke polymerization ea chloroprene hape e tsejoa e le polychloroprene kapa Chloroprene (CR).
Thepa ea mantlha:
Mocheso o Moholo Range ho tloha ~ -57°C ho ea ho 138°C (-70° – 280°F).
Tšusumetso e ntle haholo, abrasion le thepa e hanyetsanang le lelakabe.
Ho hanyetsa meokho e ntle le compression set.
E babatsehang ho hanyetsa metsi.
Ho hanyetsa hantle ho pepesehela ozone ka mokhoa o itekanetseng, UV, le boemo ba leholimo hammoho le oli, mafura le lihlapolli tse bobebe.
Ho hanana hantle le li-acid tse matla, li-solvents, li-ester le li-ketone.
Khanyetso e mpe ho chlorinated, monko o monate, le nitro-hydrocarbons.
Hangata e sebelisoa ho:
Likopo tsa Tikoloho ea Metsing
Elektronike
Litšenyehelo tse Bapehang:
Tlase
4) Silicone
Liraba tsa silicone ke li-polymer vinyl methyl polysiloxanes tse phahameng, tse khethiloeng e le (VMQ), tse sebetsang hantle haholo libakeng tse thata tsa mocheso.Ka lebaka la bohloeki ba tsona, liraba tsa silicone li loketse ka ho khetheha bakeng sa lits'ebetso tsa bohloeki.
Thepa ea mantlha:
Mocheso o Moholo Range ho tloha ~ -100°C ho isa ho 250°C (-148° – 482°F).
E babatsehang ho hanyetsa mocheso o phahameng.
Ho hanyetsa UV, ozone le boemo ba leholimo bo ikhethang.
E bonts'a phetoho e ntle ka ho fetisisa ea mocheso o tlase oa lisebelisoa tse thathamisitsoeng.
Lintho tse ntle haholo tsa dielectric.
Matla a fokolang a ho tiea le ho hanyetsa ho lla.
Khanyetso e mpe ho lihlapolli, oli, le li-acids tse ngata.
Ho hanana hantle le mouoane.
Hangata e sebelisoa ho:
Lisebelisoa tsa Lijo le Seno
Lits'ebetso tsa Tikoloho ea Meriana (Ntle le ho thibela metsi ka mouoane)
Litšenyehelo tse Bapehang:
E itekanetseng - E phahameng
5) Fluoroelastomer/Viton®
Viton® fluoroelastomers li arotsoe ka tlasa lebitso la FKM.Sehlopha sena sa elastomers ke lelapa le entsoeng ka li-copolymers tsa hexafluoropropylene (HFP) le vinylidene fluoride (VDF kapa VF2).
Li-terpolymers tsa tetrafluoroethylene (TFE), vinylidene fluoride (VDF) le hexafluoropropylene (HFP) hammoho le perfluoromethylvinylether (PMVE) tse nang le litsebo tse khethehileng li hlokomeloa ka limaraka tse tsoetseng pele.
FKM e tsejoa e le tharollo ea khetho ha mocheso o phahameng hammoho le khanyetso ea lik'hemik'hale li hlokahala.
Thepa ea mantlha:
Mocheso o Moholo Range ho tloha ~ -30°C ho ea ho 315°C (-20° – 600°F).
Molemo ka ho fetisisa mocheso o phahameng oa ho hanyetsa.
Ho hanyetsa UV, ozone le boemo ba leholimo bo ikhethang.
Khanyetso e mpe ho li-ketone, li-esters tse tlase tsa boima ba limolek'hule.
Khanyetso e mpe ea lino tse tahang le metsoako e nang le nitro
Ho hanyetsa hantle mocheso o tlase.
Hangata e sebelisoa ho:
Lisebelisoa tsa ho Tiisa ka metsing / SCUBA
Likopo tsa Mafura a Likoloi tse nang le Maemo a Phahameng a Biodiesel
Aerospace Seal Applications Ts'ehetsong ea Mafura, Setlolo, le Hydraulic Systems
Litšenyehelo tse Bapehang:
Phahameng
Nako ea poso: Apr-15-2020