Lub cev qhov hloov qhov siv tau yog tsim los ntawm ib tus neeg sawv cev, ib tug neeg txhawb nqa thiab ib tus neeg sawv cev, thiab nws tus nqi yog li 10% ntawm cov roj hmab. Nyob ntawm seb qhov puv npo ntawm cov khoom siv li cas, ntau lub tshuab ntxhua khaub ncaws ntau xws li leej faj, hlau oxides, peroxides thiab amines yuav siv tau.
Raws li cov kev cai ntawm cov khoom siv roj hmab thiab roj hmab, yuav tsum siv lub tshuab ntxhua khaub ncaws ntau, xws li leej faj, peroxide, hydrazine, rein, thiab hlau oxide. Nyob rau lub sijhawm no, cov kab xev hnyuv tws loj dua tau muab faib ua ib qho kev nplua nuj, ib qho siv tau los ntawm qhov siv lub nplaub tshev, thiab ib qho siv lub nplhaib.
Sulfur vulcanization system yog dav siv rau hauv general-purpose rubber thiab semi-universal roj hmab. Cov tshuab hlau oxide vulcanization yog siv los rau neoprene (CR), antimony thiab resin vulcanization uas yog siv rau cov roj hmab rubber (IIR), peroxidation. Cov pob txha thiab cov pob txha hnyuv siv tau yog siv rau ethylene propylene rubber (EPR), roj hmab (NR) thiab styrene butadiene rubber (SBR). Cov roj hmab hluav taws xob (xws li polysulfide roj hmab (LP), chlorosulfonated polyethylene roj hmab (CSM), chlorinated polyethylene roj hmab (CM), fluororubber (FKM), silicone roj hmab (MVQ), fluorosilicone roj hmab (FVMQ), etc.] Nws yog tag nrho ntawm cov roj hmab thiab tsis muaj ob daim ntawv pov thawj. Sulfur tsis muaj cross-linking effect. Vim li no, cov tshuab tsis muaj lub cev hnyuv tawm xws li hlau oxides, peroxides, thiab organic amine salt vulcanization systems. Nyob rau hauv xyoo tsis ntev los no, acrylate roj hmab (ACM) tau xaiv leej faj lacture curing system nyob rau hauv tag nrho cov.