Thiaj li yuav pab tau rau tej yam mob uas siv, siv ntau yam kev kawm, yuav kom zoo dua qub yam khoom ntawv thiab nqi txo yuav tsum tau muab hom khoom xyaw nyob rau hauv roj hmab. Tom qab nws yog cov roj hmab plasticating tov nrog cov khoom xyaw compounding, mus kawm nyob rau hauv lub tshuab mixing txhua yam nws kev koom tes nrog thiab tusyees dispersed nyob rau hauv roj hmab, ib txheej txheem cov khoom xyaw. Nws yog ib tug txheej txheem tseem ceeb rau thaum uas txoj roj hmab ntau lawm, tias sis tsis ncaj ntse tsis tau muab daim ntawv qhia txog kev ua si rau roj hmab thiab compounding tej yam khoom ntawv. Tau tom qab nws paub tias thaum muab nws cov compound yog qhov siv thiab ua cov khoom uas siv roj hmab, khoom ib lawm, feem ntau hu ua cov tebchaw no feem ntau yog muag xws li khoom buyers muaj tebchaw ncaj qha mus ntxuav tas, ua roj hmab Vulcanized.
