Insay di rɔba industri, di ɔltimat tɛnsiɛl trɛnk na wan impɔtant mɛkanikal prɔpati. Dis ɛkspirimɛnt paramita de mɛzhɔ di ɔltimat trɛnk fɔ wan vulkanayz rɔba kɔmpawnd. Ivin if dɛn nɔ ɛva pul wan rɔba prɔdak nia in ɔltimat tɛnsiɛl trɛnk, bɔku pipul dɛn we de yuz rɔba prɔdak stil de tek am as impɔtant tin we de sho di ɔl kwaliti fɔ di kɔmpawnd. So di tɛnsiɛl trɛnk na wan rili jenɛral spɛsifikɛshɔn, ɛn pan ɔl we di ɛnd yus fɔ wan spɛshal prɔdak nɔ gɛt bɛtɛ fɔ du wit am, bɔku tɛm di wan dɛn we de mek fɔmula kin gɛt fɔ go ɔt dɛn we fɔ mit am.
1. Jɛnɛral prinsipul dɛn
fכ mek yu gεt di hεyest tεnsil strכng, wan fכ כlwayz stat wit εlastom usay strεn-indyus kristכlayzeshn kin apin, fכ egzampl NR, CR, IR, HNBR.
2. Natural rɔba NR
Adhesives we dɛn mek wit natura l rɔba kin gɛt ay tɛnsiɛl trɛnk pas neoprene adhesives. Fɔ di difrɛn gred dɛn we dɛn mek wit natura l rɔba, di nɔmba wan fim fim gɛt di ays tɛnsiɛl trɛnk. Dɛn dɔn ripɔt se, at ɔl insay di kes fɔ kɔmpawnd dɛn we ful-ɔp wit kabɔn blak, nɔmba 3 fim fim de gi bɛtɛ tɛnsiɛl trɛnk pas nɔmba 1 fim fim. Fɔ natura l rɔba kɔmpawnd, dɛn fɔ avɔyd kemikal plastizayza (plastisol) lɛk biphenyl amidothiophenol ɔ pentachlorothiophenol (PCTP), bikɔs dɛn de ridyus di tɛnsiɛl trɛnk we di kɔmpawnd gɛt.
3. Klɔroprin CR
Kloroprene (CR) na wan strayn-induced kristalin rɔba we de gi ay tɛnsiɛl trɛnk we fila nɔ de. Infakt, sɔntɛnde dɛn kin mek di tɛnsiɛl trɛnk go ɔp bay we dɛn ridyus di fila. di hכy mכlikul wet dεm fכ CR de gi hכy tεnsil strכng.
4. Naytril rɔba NBR
NBR wit ay kɔntinyu fɔ akrilonitril (ACN) de gi ay tɛnsiɛl trɛnk. NBR wit wan smɔl mɔlikul wet distribyushɔn de gi ay tɛnsiɛl trɛnk.
5. Influɛns fɔ di mɔlikul wet
bay optimayzεshכn, di yus כf NBR dεm wit hכy mεniskכs viskositi εn hכy mכlikul wet de gi hכy tεnsil strכng.
6. Karboksilayt ɛlastɔm dɛn
Tink bɔt fɔ riples NBR we nɔ gɛt kabɔksilayt wit XNBR we nɔ gɛt kabɔksilayt ɛn HNBR we nɔ gɛt kabɔksilayt wit XHNBR we gɛt kabɔksilayt fɔ mek di kɔmpawnd gɛt di tɛnsiɛl trɛnk.
Kabכksilayt NBR wit wan fayn amoun fכ zink oksayd de gi hכy tεnsil trεnk pas kכvεshכnal NBR.
7. Di EPDM
di yus fכ sεmi-kristalin EPDM (high ethylene kכntεnt) de gi hכy tεnsil strכng.
8. Riaktiv EPDM
riples EPDM we nכ mכdify wit 2% (mas frakshכn) maleic anhydride modifyed EPDM in blεnd wit NR de inkrεs di tεnsil strכng fכ NR/EPDM kכmpawnd dεm.
9. Jɛl dɛn
sεntetik jel dεm lεk SBR jεnarali kכntεn stεbyulayz. כltu, we dεn miks SBR kכmpawnd dεm na tεmprachכ we pas 163°C, dεn kin prodyuz כl tu di lכs jel dεm (we dεn kin blεnd away) εn tayt jel dεm (we dεn nכ kin blεnd away εn we nכ de sכlv insay sכm sכlvεnt dεm). di tu kayn jel dεm de ridyus di tεnsil strכng fכ di kכmpawnd. So, di miksin tεmprachכ fכ SBR fכ trit wit kεriכn.
10. Vulkanayzeshɔn
Wan impɔtant we fɔ gɛt ay tɛnsiɛl trɛnk na fɔ ɔptimayz di kroslink density, avɔyd ɔnda-sɔlfɔrayzayshɔn, post-vulkanayzeshɔn ɛn avɔyd blistering pan di rɔba we dɛn de vulkanayz bikɔs ɔf inɔf prɛshɔn ɔ di yus ɔf volatil kɔmpɔnɛnt dɛn.
11. Prɛshɔn-drɔp vulkanayzeshɔn
fכ prodakt dεm we dεn vulkanayz insay כtoklev, dεn kin avכyd di fכmeshכn fכ blista dεm εn di rizulεt rεdukshכn pan tεnsil trεnk bay we dεn de ridyus di prεshכn sכmtεm te di vulkanayzεshכn dכn, dεn kכl dis ‘prεshכn dכp vulkanayzεshכn’.
12. Vulkanayzeshɔn tɛm ɛn tɛmpracha
lכng vulkanayzεshכn tεm dεm na lכw tεmprachכ de rεsult in di fכmeshכn fכ mכlti-sכlfa bכnd nεtwכk, hכy sכlfa kכroslink dεnsiti εn kכnsekvεntli hכy tεnsil strכng.
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14. Di wan dɛn we de ful-ɔp
Fɔ fil dɛm lɛk kabɔn blak ɔ silika, di chuk we yu pik wan smɔl patikyula saiz wit big spɛshal sɔfa eria kin bi ifɛktiv fɔ impɔtant tɛnsiɛl trɛnk. Dɛn fɔ avɔyd tin dɛn we nɔ de riinfɔs ɔ ful-ɔp lɛk kle, kalsiɔm kabɔnɛt, tak, kwats san, ɛn ɔda tin dɛn.
15. Kabon blak
Fɔ mek shɔ se kabɔn blak skata fayn fayn wan, dɛn fɔ mek di filin go ɔp to di bɛst lɛvɛl fɔ mek di tɛnsiɛl trɛnk bɛtɛ. Kabon blak wit smɔl patikyula saiz go gɛt smɔl optimum filin amɔnt. If yu inkrisayz di spεsifi k surface εria fכ di kabכn blak εn impruv di dispershכn fכ di kabכn blak bay we yu εksεnd di miksin saykl kin impruv di tεnsil trεnk fכ di rכba.
16. Wait kabon blak
di yus fכ prεsipitεt silika wit ay spεsifi k sכfayz εria kin ifektivli impruv di tεnsil trεnk fכ di kכmpawnd.
17. Di wan dɛn we de mek plastic
Dɛn fɔ avɔyd fɔ yuz plasticiz if dɛn want fɔ gɛt ay tɛnsiɛl trɛnk.
. If di vulcanising ejen nɔ skata fayn fayn wan, di tɛnsiɛl trɛnk kin rili afɛkt.
19. Mכlti-sכlfa bכnd kכroslink nεtwכk
wit kכvεshכnal vulkanayzεshכn sistεm dεm, di kכroslink nεtwכk de dכmin bay polysulphide bכnd dεm; wit EV, di kroslinkin nεtwכk de dכmin bay singl εn dכbl sכlfayd bכnd, di fכs wan de rizulta in hכy tεnsil strכng.
20. Ayɔn kroslinkin nɛtwɔk dɛn
Ayɔn krɔs-link kɔmpawnd dɛn gɛt ay tɛnsiɛl trɛnk bikɔs di krɔs-link pɔynt dɛn kin slip ɛn dat mek dɛn kin muv we dɛn nɔ rɔtin.
21. Strεs kristכlayzεshכn
Di kɔmbaynshɔn fɔ natura rɔba ɛn niɔprin we gɛt strɛs kristal dɛn na di adeziv go ɛp fɔ mek di tɛnsiɛl trɛnk go ɔp.
