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 & Likoloi tsa Mafura a Tšoaroang Likopo
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/tsa Kamore e Bata
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-ketones, 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
Lisebelisoa tsa Setiiso sa Aerospace ho Tšehetso ea Mafura, Mafura, le Litsamaiso tsa Hydraulic
Litšenyehelo tse Bapehang:
Phahameng
Nako ea poso: Apr-15-2020