Cov roj hmab ntuj yog tsim los ntawm latex, thiab ib feem ntawm cov khoom siv tsis yog roj hmab uas muaj nyob rau hauv cov latex tseem nyob hauv cov khoom siv roj hmab. Feem ntau, cov roj hmab ntuj muaj 92% -95% ntawm roj hmab hydrocarbons, thaum tsis yog roj hmab hydrocarbons suav txog 5% -8%. Vim yog txoj kev tsim khoom sib txawv, thaj chaw tsim khoom sib txawv thiab txawm tias lub caij sib txawv ntawm cov roj hmab sib txawv, qhov kev faib ua feem ntawm cov khoom xyaw no yuav txawv, tab sis lawv nyob hauv qhov ntau.
Protein tuaj yeem txhawb lub vulcanization ntawm roj hmab thiab ncua kev laus. Ntawm qhov tod tes, cov protein muaj zog nqus dej, uas tuaj yeem ua rau cov roj hmab nqus cov dej noo thiab pwm, thiab cov rwb thaiv tsev yog degraded, thiab cov protein muaj qhov tsis zoo ntawm kev ua kom sov.
Acetone extracts yog qib high-qib fatty acids thiab sterols, ib co ntawm cov uas ua raws li ntuj antioxidants thiab accelerators, thiab lwm yam uas pab cov hmoov compounding tus neeg sawv cev disperse thaum lub sij hawm sib tov thiab soften cov roj hmab raw.
Cov tshauv feem ntau muaj cov ntsev xws li magnesium phosphate thiab calcium phosphate, thiab muaj cov hlau me me xws li tooj liab, manganese, hlau, thiab lwm yam, vim tias cov hlau sib txawv no tuaj yeem txhawb cov roj hmab aging, yog li lawv cov ntsiab lus yuav tsum tau tswj.
Cov dej noo hauv cov kua nplaum qhuav tsis tshaj 1%, thiab nws tuaj yeem hloov pauv thaum ua haujlwm. Txawm li cas los xij, thaum cov ntsiab lus noo noo ntau dhau, nws yuav tsis tsuas yog ua rau mildew thaum lub sij hawm khaws cia ntawm cov roj hmab nyoos, tab sis kuj cuam tshuam rau kev ua cov roj hmab, xws li cov neeg sawv cev sib xyaw thaum sib xyaw. Pab pawg; npuas tau yooj yim tsim thaum lub sij hawm calendering thiab extrusion, thiab npuas los yog daim txhuam cev yog tsim thaum lub sij hawm vulcanization txheej txheem.