Aw fɔ mek di tɛmpratura rɛsistɛns fɔ rɔba bɛtɛ?
Resistance to hot air aging or heat aging de kam impɔtant mɔ ɛn mɔ, mɔ na ɔtomotiv aplikeshɔn usay dɛn kin yuz rɔba pat mɔ na kɔba spɛs wit ay ambiɛnt tɛmpracha. Di wan dɛn we de mek motoka dɛn dɔn fil se dɛn de mɔna dɛn fɔ mek dɛn ebul fɔ mek dɛn gɛt lɔng savis layf fɔ dɛn rɔba pat dɛn. Anaerobic Heat Aging Properties ɛn Heat ɛn Air Aging prɔpati dɛn difrɛn. Di rɔba gɛt bɛtɛ ɔt rɛsistɛns, bɔt i kin stil nɔ ebul fɔ bia wit ɔksijɛn atak.
Notis: Dɛn jenɛral tɛst protɔkɔl ya nɔ go aplay to ɛni patikyula kes. Ɛni wan pan di vayriɔbul dɛn we go ebul fɔ impruv di ay-ɛj rɛsistɛns ɔ di ɔt-ɛj rɛsistɛns go mɔs afɛkt ɔda prɔpati dɛn, ilɛksɛf na fɔ bɛtɛ ɔ fɔ wɔs.
1. Pɛrfluoroɛlastɔmɔ .
If di rɔba matirial nid fɔ gɛt fayn fayn ɔt rɛsistɛns, yu fɔ pik rɔba we gɛt pɔfluorin. i ripot se di yus tεmprachכ fכ pεrfluoroelastomer de rich 316°C.
2、 Fluorine rɔba .
Fluorine Rɔba FKM gɛt fayn fayn ɔt rɛsistɛns, ɛn yu kin yuz am na tɛmpracha we go rich 260°C. Fɔ mek yu ebul fɔ mek di ay tɛmpracha rɛsistɛns fɔ fluorine rɔba strɔng mɔ, yu nid fɔ pik di rayt asid aksepta (asid absɔbɛn), lɛk lɔw aktiviti magnɛsiɔm ɔksayd, ay aktiviti magnɛsiɔm ɔksayd, kalsiɔm ɔksayd, kalsiɔm haydroksayd, zink ɔksayd, ɛn ɔda tin dɛn. Fluoroelastomer in ɔt rɛsistɛns ɛya aging pefɔmɛns kin bi bak rili gud, ɛn di yus tɛmpracha kin bi lɛk aw i kin bi lɛk 2000000000000000000 na di tɛm we dɛn kin yuz am. Bay we yu pik bisphenol AF as di vulkanizashɔn sistem, di ɔt we di rɔba nɔ de ol go bɛtɛ. Dɛn kin yuz am na harsh injin ɔyl ɛnvayrɔmɛnt, di ɔt we de ol di rɛsistɛns fɔ di ternary fluoroelastomer we dɛn mek wit vinylidene fluoride, tetrafluoroethylene ɛn propylene bɛtɛ pas di jenɛral fluoroelastomer. Dis na bikɔs ɔf di riplesmɛnt fɔ hexafluoropropropylene bay prɔpaylɛn insay di polimayzayshɔn prɔses.
3、 HNBR .
Di ay digri we di haydrojɛneshɔn de, na di mɔ di ɔt rɛsistɛns fɔ HNBR, bikɔs i nɔ gɛt ɛni ɔnsatyuret dɛbul bond na di men chen we nɔ stebul. Sɔm HNBR dɛn kin stil vulkaniz wit sɔlfɔ bikɔs dɛn stil gɛt sɔm ɔnsatyuret dabl bɔnd. כltu, if vulcanized wit pεrכksayd, di hεt rεsistεns fכ di kכmpawnd go improv. Fɔ HNBR rɔba, TOTM kin gi bɛtɛ ɔt rɛsistɛns pas DOP bikɔs ɔf di lɔw volatiliti ɛn ay mɔlikul wet fɔ dɛn trioktayl plasticizers ya.
4. Neoprene .
W-Type neoprene gɛt bɛtɛ ɔt ɛj rɛsistɛns pas G-tayp neoprene. Diphenylamine octanoate na bεtεh antioxidant fכ neoprene, we kin ebul fכ impruv di hεt rεsistεns fayn fayn wan.
5、 EPDM .
EPDM go stil gɛt gud ɔt rɛsistɛns na 125°C afta fit fit. di yus fכ pεrכksayd vulcanized EPDM, kin mek di rכba gεt bεtεh hכt rεsistεns.
6、 Low viskɔsiti vapour faz mɛtɔd EPDM
Di ay ethylene kɔntinyu ɛn ɔltra-lɔ viskɔsiti vapour faz EPDM, kin ful-ɔp wit bɔku bɔku filɛs, bikɔs ɔf di ay ɛtɛlin kɔntinyu, prɔses nɔ nid fɔ jɔyn di prɔsesin fɔ ɔt-rɛsistant ɛya ol we nɔ fayn ɛn rɛsin, stil kin mek di rɔba wit gud prɔsesin prɔpati, so di aktual ɔt rɛsistɛns fɔ di rɔba de impɔtant.
7、 Avɔyd fɔ yuz ay styrene rɛsin .
Nɔ ad ay styrene rɛsin to di rɔba we dɛn yuz na ay tɛmpracha.
8、 Talkum paoda .
Insay EPDM hos rɔba, riples 40% pan di kabɔn blak wit talkum paoda, we kin mek di rɔba nɔ ebul fɔ ol di rɔba. Sɔm gred dɛn fɔ talkum paoda gɛt mɔ fayn fayn bɛnifit dɛn pas kle we dɛn trit ɔ we dɛn nɔ trit pan dis.
9、 Ay viskɔsiti plasticizer .
Na di plasticizers, ay viskositi plasticizers kin gi beta heat aging resistans pas low viskositi plasticizers. Bikɔs di ay viskɔsiti plasticizer kin gɛt ay mɔlikul wet, nɔ izi fɔ volatilize, so gud stebiliti ɛn gud ɔt rɛsistɛns.
10、Rɛp sid ɔyl fɔ neoprene
Fɔ mek Niɔprin gɛt bɛtɛ resiliɛns, dɛn nid kanola ɔyl bikɔs i gɛt lɔw viskɔsiti, we de mek di rɔba gɛt lɔw hysteresis ɛn low volatility, we kin mek di rɔba gɛt gud ol resistans.
11、Effective EV/semi-effective sev vulkanizashɔn sistem .
Insay di ifɛktiv ɔ sɛmi-ɛfɛktiv vulkanizashɔn sistɛm, di rɛsɛshɔn fɔ aksilarayt ɛn sɔlfɔ ay, dat na, 'High promoshɔn ɛn lɔw sɔlfɔ' sistɛm, wit 'sulfur to di bɔdi' instead ɔf singl sɔlfɔ, insay dis vulkanizashɔn sistem, di prɔpɔshɔn fɔ wan sɔlfɔ bond ɛn dabul sɔlfɔnshɔn sistɛm na di vulkanizeshɔn sistɛm ɛn di rishɔ we de na di vulkanizeshɔn sistɛm na di vulkanizeshɔn sistɛm na di vulkanizeshɔn sistɛm ɛn dabul sɔlfɔ. Sɔlfɔ bond ay pas di wan we gɛt mɔlti-sɔlfɔ bɔnd, so, di ɔt rɛsistɛns stebiliti fɔ di rɔba de impɔtant ɛn di ɔt we de ol nɔ de bɛtɛ.
12、Zinc ɔksayd .
Vulcanization / sub-sulfuramide Vulcanization system of the rubber, we ful-ɔp wit mɔ zink ɔksayd, kin gi di rɔba bɛtɛ ɔt ol prɔpati ɛn bɛtɛ rɛsistɛns to post-sɔlfa.
13、Peroxide vulkaniz EPDM rɔba .
insay di pεrכksayd vulkaniz EPDM kכmpawnd, dεn pik ZMTI as di antioksidant, we kin gi di kכmpawnd hכy mכdulus εn hεt εj rεsistεns.
