1. lub ntsiab raw khoom cov roj hmab cov khoom uas yog raws cov raw khoom tawg yooj yim, thiab roj hmab zus nyob rau hauv teb chaws sov thiab huab dag ntuag los ntawm cov tawv ntoo ntawm cov roj hmab ntoo los.
2. cov khoom xyaw ntau yam muab xav ua kom tej yam khoom uas txoj roj hmab ntu khoom.
3. fibrous khoom (paj rwb, maj, wool thiab fiber ntau hluavtaws, hluavtaws fiber ntau thiab hlau, hlau) yog siv li roj hmab reinforcing ntaub ntawv, thiab yuav ua rau kom tus ua tau txhua yam, txwv khoom variants. Cov khoom xyaw yuav tsum muaj raws li txoj cai lub mis in the process of zaub zoo tshaj uas muaj raw khoom tawg yooj yim. Thiaj li yuav ua cov roj hmab unvulcanized compounding xyaw es thiaj yuav tau tov sib, cov khoom yuav tsum mus yuav. Roj hmab nyob rau hauv 60--70 ° c cub ci gel mos, tu nrho rau daim me me, siv nris. Paraffin, stearic acid thiab rosin los yog crushed. Cov hmoov uas muaj txhua yam impurities los tau ntxhib lim kom tshem tau cov kua xws li ntoo thuv ib, COUMARONE tau cua kub, melting, evaporation, filtering impurities, siv qhuav los yog yooj yim rau agglomeration, nws, yog tsis dispersed uniformly sulfide npuas yuav cuam tshuam ntawm cov khoom zoo.
