Lisebelisoa tse tloaelehileng tsa rabara——tšobotsi ea EPDM
Molemo:
Ho hanyetsa botsofali hantle haholo, ho hanyetsa boemo ba leholimo, ho kenya motlakase, k'hemik'hale ea ho senya lik'hemik'hale le elasticity.
Mefokolo:
Lebelo le fokolang la ho folisa; Ho thata ho kopanya le li-rubber tse ling tse sa tsitsang, 'me ho ikamahanya le ho khomarela ho fokola haholo, kahoo ts'ebetso ea ts'ebetso e fokola.
Ningbo Yokey Automotive Parts Co., Ltd e tsepamisitse maikutlo ho rarolleng mathata a thepa ea rabara ea bareki le ho rala mekhoa e fapaneng ea thepa e ipapisitseng le maemo a fapaneng a ts'ebeliso.
Thepa: lintlha
1. Boima bo tlaase le ho tlatsa holimo
Ethylene propylene rabara ke mofuta oa rabara e nang le sekhahla se tlase sa 0.87. Ho phaella moo, palo e kholo ea oli e ka tlatsoa 'me ho ka kenyelletsoa li-fillers, tse ka fokotsang litšenyehelo tsa lihlahisoa tsa rabara le ho etsa theko e phahameng ea rabara e tala ea ethylene propylene rabara. Ho phaella moo, bakeng sa rabara ea ethylene propylene e nang le boleng bo phahameng ba Mooney, matla a 'mele le a mechine ka mor'a ho tlatsa holimo a ke ke a fokotseha haholo.
2. Ho hanyetsa botsofali
Ethylene propylene rabara e na le khanyetso e ntle ea boemo ba leholimo, ho hanyetsa ozone, ho hanyetsa mocheso, acid le alkali resistance, ho hanyetsa mouoane oa metsi, botsitso ba mebala, ts'ebetso ea motlakase, ho tlatsa oli le mocheso oa mocheso oa kamoreng. Lihlahisoa tsa rabara ea ethylene propylene li ka sebelisoa nako e telele ho 120 ℃, 'me li ka sebelisoa hakhutšoanyane kapa ka linako tse ling ho 150 - 200 ℃. Mocheso oa tšebeliso o ka eketsoa ka ho eketsa antioxidant e nepahetseng. EPDM e kopantsoeng le peroxide e ka sebelisoa tlas'a maemo a thata. Ha mahlaseli a ozone a EPDM e le 50 phm le nako ea ho otlolla ke 30%, EPDM e ka fihla 150 h ntle le ho senya.
3. Ho hanyetsa kutu
Ka lebaka la khaello ea polarity le tlaase unsaturation ea ethylene propylene rabara, e na le ho hanyetsa e ntle ho lik'hemik'hale tse sa tšoaneng polar tse kang joala, acid, alkali, oxidant, refrigerant, detergent, liphoofolo le oli ea meroho, ketone le mafura; Leha ho le joalo, e na le botsitso bo fokolang ho lihlapolli tse mafura le tse nkhang hamonate (tse kang peterole, benzene, joalo-joalo) le oli ea liminerale. Tshebetso e tla boela e fokotsehe tlas'a ketso ea nako e telele ea acid e tsitsitseng. Ho ISO/TO 7620, lintlha tse mabapi le litlamorao tsa lik'hemik'hale tse ka bang 400 tse senyang le tse nang le metsi holim'a thepa ea liraba tse fapaneng lia bokelloa, 'me limaraka tsa 1-4 li hlalositsoe ho bonts'a litlamorao tsa tsona. Litlamorao tsa lik'hemik'hale tse senyang thepa ea li-rubber ke tse latelang:
Phello ea Kereiti ea ho Ruruha ha Bophahamo ba Sekhahla/% Phokotso ea boima ba Thepa
1<10<10 Hanyenyane kapa ha ho letho
2 10-20<20 e nyane
3 30-60<30 Mahareng
4>60>30 tse tebileng
4. Ho hanyetsa mouoane oa metsi
EPDM e na le khanyetso e ntle ea mouoane 'me ho hakanngoa hore e phahametse mocheso oa eona. Ka mouoane o chesang haholo oa 230 ℃, ponahalo ha e fetohe ka mor'a lihora tse ka bang 100. Leha ho le joalo, tlas'a maemo a tšoanang, ponahalo ea rabara ea fluorine, rabara ea silicon, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile le rabara ea tlhaho e ile ea senyeha haholo ka nako e khutšoanyane.
5. Ho hanyetsa metsi a chesang haholo
Ethylene propylene rabara e boetse e na le khanyetso e ntle ea metsi a chesang haholo, empa e amana haufi-ufi le mekhoa eohle ea vulcanization. Thepa ea mochini oa rabara ea ethylene propylene (EPR) e kentsoeng ka dimorphine disulfide le TMTD e ile ea fetoha hanyane kamora ho qoelisoa metsing a futhumetseng a 125 ℃ ka likhoeli tse 15, mme sekhahla sa katoloso ea molumo e ne e le 0.3% feela.
6. Ts'ebetso ea motlakase
Ethylene propylene rabara e na le mokelikeli o babatsehang oa motlakase le ho hanyetsa corona, 'me thepa ea eona ea motlakase e phahametse kapa e haufi le ea rabara ea styrene butadiene, chlorosulfonated polyethylene, polyethylene le polyethylene e amanang le sefapano.
7. Ho thella ha matla
Hobane rabara ea ethylene propylene ha e na li-substituents tsa polar mohahong oa eona oa limolek'hule le matla a tlaase a ho kopanya limolek'hule, ketane ea eona ea limolek'hule e ka boloka ho feto-fetoha ha maemo ka mefuta e mengata, ea bobeli feela ho rabara ea tlhaho le cis polybutadiene rabara, 'me e ntse e ka boloka mocheso o tlaase.
8. Ho khomarela
Ka lebaka la khaello ea lihlopha tse sebetsang ka har'a sebopeho sa limolek'hule tsa rabara ea ethylene propylene, matla a ho kopanya a tlaase, 'me rabara e bonolo ho fafatsa, kahoo ho ikamahanya le ho khomarela ho fokola haholo.
Nako ea poso: Oct-10-2022