Aw fɔ mek di rɔba nɔ gɛt bɛtɛ tɛmpracha?

Resistans to hot air aging or heat aging de bi impɔtant mɔ ɛn mɔ, mɔ na motoka aplikeshɔn usay dɛn kin yuz rɔba pat dɛn mɔ na say dɛn we dɛn kɔba wit ay ambiɛnt tɛmpracha. Di wan dɛn we de mek motoka dɛn dɔn fil se dɛn de mɔna dɛn fɔ mek dɛn go ebul fɔ liv lɔng fɔ dɛn rɔba pat dɛn. Anaerobic hεt aging prכpati dεm εn hεt εn εya aging prכpati dεm difrεn. Di rɔba gɛt bɛtɛ ɔt rɛsistɛns, bɔt i kin stil nɔ ebul fɔ bia wit ɔksijɛn atak.

Notis: Dɛn jenɛral tɛst protɔkɔl ya nɔ kin aplay to ɛni patikyula kes. Eni wan pan di vεriεbul dεm we kin impruv di εya-εj rεsistεns כ hεt-εj rεsistεns go definitli afekt כda prכpati dεm, fכ bεtε כ fכ wכs.

1. Pɛrfluoroɛlastɔmɛr

If di rɔba matirial nid fɔ gɛt fayn fayn ɔt rɛsistɛns, yu fɔ pik rɔba we gɛt pɔrfluorin. i ripot se di yus tεmprachכ fכ pεrfluoroelastomer de rich 316°C.

2、 Flɔrin rɔba

Fluorine rubber FKM gɛt fayn fayn ɔt rɛsistɛns, ɛn dɛn 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 absɔbɛnt), lɛk lɔw aktiviti magnɛsiɔm ɔksayd, ay aktiviti magnɛsiɔm ɔksayd, kalsiɔm ɔksayd, kalsiɔm haydroksayd, zink ɔksayd, ɛn ɔda tin dɛn 200°C. bay we yu pik bisphenol AF as di vulcanization sistεm, di hεt aging rεsistεns fכ di rכba go bεtε. If yu yuz am na harsh injin ɔyl ɛnvayrɔmɛnt, di ɔt ol rɛsistɛns fɔ tɛnari fluoroelastomer we dɛn mek wit vinylidene fluoride, tetrafluoroethylene ɛn propylene bɛtɛ pas di jenɛral fluoroelastomer. dis na biכs fכ di riplesmεnt fכ hεksafluoropropilεn bay prכpilin insay di polimכrayzeshn prכsεs.

3、 HNBR na di wan we de wok

di hכy digri fכ haydrojenεshכn, di bεtε di hεt rεsistεns fכ HNBR, biכs i kכlכsכl nכ כnsatyuret dכbl bכnd de pan di men chen we nכ stebul. sכm HNBR dεm kin stil vulkaniz wit sכlfa biכs dεn stil gεt sכm כnsatyuret dכbl bכnd dεm. Bɔt if dɛn vulkaniz am wit pɔrɔksayd, di ɔt rɛsistɛns fɔ di kɔmpawnd go bɛtɛ. Fɔ HNBR rɔba, TOTM kin gi bɛtɛ ɔt rɛsistɛns pas DOP bikɔs ɔf di lɔw volatility ɛn ay mɔlikul wet fɔ dɛn triɔktil plastizayza ya.

4. Nioprene we dɛn kin yuz

W-tayp nioprin gɛt bɛtɛ ɔt ol rɛsistɛns pas G-tayp niɔprin. Diphenylamine octanoate na bεtε antioksidant fכ neoprene, we kin εfεktiv fכ impruv di hεt rεsistεns.

5、 EPDM we dɛn kin yuz

EPDM go stil gɛt gud ɔt rɛsistɛns na 125°C afta fit fit. di yus fכ pεrכksayd vulkanayz EPDM, kin mek di rכba gεt bεtεh hεt rεsistεns.

6、 Low viskositi vapour faz mεtכd EPDM

Ay ethylene kɔntinyu ɛn ultra-lɔ viskɔsiti vapour phase EPDM, kin ful-ɔp wit bɔku bɔku fil, bikɔs ɔf di ay ethylene kɔntinyu, prɔsesin 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 resin

Nɔ ad ay styrene resin to di rɔba we yu de yuz we di ples wam pasmak.

8、 Talkum paoda we de mek yu yuz am

Insay EPDM hos rɔba, riples 40% pan kabɔn blak wit talk paoda, we kin mek di rɔba nɔ ebul fɔ ol di ɔt. Sɔm gred dɛn fɔ talk paoda gɛt mɔ ɔda bɛnifit dɛn pas kle we dɛn dɔn trit ɔ we dɛn nɔ trit pan dis.

9、 Plastizayza we gɛt ay viskɔsiti

Na di plasticizers, di high viscosity plasticizers kin gi beta heat aging resistance pas low viscosity plasticizers. Bikɔs di ay viskɔsiti plastizayza kin gɛt ay mɔlikul wet, i nɔ izi fɔ volatilayz, so gud stebiliti ɛn gud ɔt rɛsistɛns.

10、Rɛp sid ɔyl fɔ neoprene

Fɔ mek neoprene gɛt bɛtɛ resiliɛns, dɛn nid kanola ɔyl bikɔs i gɛt smɔl viskɔsiti, we de mek di rɔba gɛt lɔw hysteresis ɛn lɔw volatility, we kin mek di rɔba gɛt gud aging resistance.

11、Effektiv EV/sεmi-effektiv SEV vulkanayzεshכn sistεm

Insay di ifektiv ɔ sɛmi-ɛfɛktiv vulkanayzeshɔn sistɛm, di rishɔ fɔ aksilarayt ɛn sɔlfɔ de ay, dat na, 'ay prɔmoshɔn ɛn lɔw sɔlfɔ' sistɛm, wit 'sɔlfɔ to di bɔdi' instead ɔf singl sɔlfɔ, insay dis vulkanayzeshɔn sistɛm, di prɔpɔshɔn fɔ singl sɔlfɔ bon ɛn dabl sɔlfɔ bon na di vulkanayz rɔba de ay, bikɔs ɔf in stebiliti Insay dis vulkanayzeshɔn sistεm, di rεshכn fכ singl sכlfa bכnd εn dכbl sכlfa bכnd hכy pas di wan fכ mכlti-sכlfa bכnd, dat mek di hεt rεsistεns stεbiliti fכ di rכba de impruv εn di hεt εj rεsistεns de impruv.

12、Zink ɔksayd

Vulcanization / sub-sulfuramide vulcanization sistem fכ di rכba, we fulכp wit mכr zink oksayd, kin gi di rכba bεtε hεt εj prכpati εn bεtε rεsistεns to post-sכlfa.

13、Pɛrɔksayd vulkanayz EPDM rɔba

insay di pεrכksayd vulkanayz EPDM kכmpawnd, dεn pik ZMTI as di antioksidant, we kin gi di kכmpawnd hכy mכdulus εn hεt εj rεsistεns.