Litšobotsi tsa rabara ea EPDM ke life?

1. Boima bo tlase le ho tlatsa ho hoholo
Rabara ea ethylene-propylene ke rabara e nang le boima bo tlase, e nang le boima ba 0.87. Ho phaella moo, e ka tlatsoa ka oli e ngata le EPDM.
Ho eketsa di-filler ho ka fokotsa ditjeo tsa dihlahiswa tsa rabara mme ha etsa hore theko e hodimo ya rabara e tala ya ethylene propylene e be ntle. Bakeng sa rabara ya ethylene propylene e nang le boleng bo hodimo ba Mooney, matla a mmele le a mechini a ho tlatsa ho hoholo ha a fokotsehe haholo.

2. Khanyetso ea botsofali
Rabara ea ethylene-propylene e na le khanyetso e ntle ea boemo ba leholimo, khanyetso ea ozone, khanyetso ea mocheso, khanyetso ea asiti le alkali, khanyetso ea mouoane oa metsi, botsitso ba 'mala, litšobotsi tsa motlakase, litšobotsi tsa ho tlatsa oli le ho phalla ha mocheso oa kamore. Lihlahisoa tsa rabara ea ethylene-propylene li ka sebelisoa nako e telele ho 120°C, 'me li ka sebelisoa ka nakoana kapa ka linako tse ling ho 150-200°C. Ho eketsa li-antioxidants tse loketseng ho ka eketsa mocheso oa eona oa tšebeliso. Rabara ea EPDM e kopantsoeng le peroxide e ka sebelisoa tlas'a maemo a thata. Rabara ea EPDM e ka fihla lihora tse fetang 150 ntle le ho petsoha tlas'a maemo a mahloriso a ozone a 50pphm le ho otlolla 30%.

3. Khanyetso ea ts'enyeho
Kaha rabara ea ethylene propylene ha e na polarity le tekanyo e tlase ea ho se lekane, e na le khanyetso e ntle ho lik'hemik'hale tse fapaneng tsa polar tse kang alcohols, acid, alkalis, oxidants, refrigerants, detergents, oli ea liphoofolo le ea meroho, ketones le mafura. Empa e na le botsitso bo fokolang ho li-solvents tse mafura le tse nkhang hamonate (tse kang peterole, benzene, jj.) le oli ea diminerale. Tshebetso e tla boela e fokotsehe tlas'a ketso ea nako e telele ea asiti e kopaneng. Ho ISO/TO 7620, mefuta e ka bang 400 ea lik'hemik'hale tse senyang le tse metsi e bokelletse tlhahisoleseling mabapi le thepa e fapaneng ea rabara, 'me e totobalitse maemo a 1-4 ho bontša tekanyo ea ketso ea tsona, le tšusumetso ea lik'hemik'hale tse senyang holim'a thepa ea rabara.

Bophahamo ba Molumo oa Sehlopha Sekhahla sa ho ruruha/% Boleng ba phokotso ea ho thatafala Tšusumetso ts'ebetsong
1 <10 <10 hanyane kapa che
2 10-20 <20 tse nyane
3 30-60 <30 mahareng
4 >60 >30 e matla

4. Khanyetso ea mouoane oa metsi
Rabara ea ethylene-propylene e na le khanyetso e ntle ea mouoane oa metsi 'me ho hakanngoa hore e betere ho feta khanyetso ea eona ea mocheso. Ka mouoane o chesang haholo oa 230℃, ponahalo ea EPDM e ile ea lula e sa fetohe kamora lihora tse ka bang 100. Leha ho le joalo, tlas'a maemo a tšoanang, rabara ea fluorine, rabara ea silicone, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile, le rabara ea tlhaho li bile le ho senyeha ho hoholo ponahalong kamora nako e khuts'oane.

5. Khanyetso ea metsi a futhumetseng haholo
Rabara ea ethylene-propylene le eona e na le khanyetso e betere ho metsi a chesang haholo, empa e amana haufi-ufi le litsamaiso tsohle tsa vulcanization. Rabara ea ethylene-propylene e nang le dimorpholine disulfide le TMTD e le sistimi ea vulcanization, kamora ho qoelisoa metsing a chesang haholo ho 125°C ka likhoeli tse 15, thepa ea mechini e fetoha hanyane haholo, 'me sekhahla sa katoloso ea bophahamo ke 0.3% feela.

6. Tshebetso ya motlakase
Rabara ea ethylene-propylene e na le litšobotsi tse ntle tsa ho thibela motlakase le ho hanyetsa corona, 'me litšobotsi tsa eona tsa motlakase li betere ho feta kapa li batla li tšoana le tsa rabara ea styrene-butadiene, polyethylene ea chlorosulfonated, polyethylene le polyethylene e hokahaneng ka sefapano.

7. Ho tenyetseha
Hobane ha ho na lintho tse nkeloang sebaka ke polar sebopehong sa limolek'hule tsa rabara ea ethylene-propylene, matla a kopaneng a molek'hule a tlase, 'me ketane ea limolek'hule e ka boloka ho tenyetseha ka mefuta e mengata, e latelang rabara ea tlhaho e ka buisanoang le ea butadiene, 'me e ntse e ka bolokoa mochesong o tlase.

8. Ho khomarela
Rabara ea ethylene-propylene ha e na lihlopha tse mafolofolo ka lebaka la sebopeho sa eona sa limolek'hule 'me e na le matla a fokolang a ho kopana. Ho phaella moo, rabara e bonolo ho thunya, 'me ho itšoarella ha eona le ho khomarelana ha eona ho fokola haholo.