Njengoko ixabiso lezinto ezingafunekiyo kwiitayara, iindleko zemveliso ze-bias inyuka . ukwenzela ukunciphisa iindleko zerabha, kunciphisa iimveliso zerabha ezisetyenziselwa i-chads yerabha, amanzi evumba I-TARY YOKUGQIBELA YOMSEBENZI WOKUGQIBELA NOKU-. ukusukela kwi-rabber yerhasi ye-oxygen kunye ne-raw yoxinzelelo lwe-Oxure isetyenziselwa ukumelana nobushushu . ngokuchasene nerabha ye-bibber ikakhulu .
I-EPYNJJJECKM yi-Copolym i-copolyne, i-propylene kunye nenani elincinci le-disjected diene {{1} {{1} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} {{4} Emva kokongeza i-carbon emnyama, kunye nenkqubo yokulungisa ayilunganga . phantsi kweemeko ezithile ze-EPDM kwi-vulcumanizate .