Roj hmab muaj qhov elasticity zoo, tab sis cov khoom muaj nqis no ua rau muaj teeb meem loj hauv kev tsim khoom. Yog tias qhov elasticity ntawm cov roj hmab nyoos tsis raug txo qis ua ntej, feem ntau ntawm lub zog kho tshuab raug siv rau hauv qhov elastic deformation thaum lub sijhawm ua cov txheej txheem, thiab cov duab xav tau tsis tuaj yeem tau txais. Cov txheej txheem ua cov roj hmab muaj qee qhov yuav tsum tau ua rau cov roj hmab nyoos plasticity, xws li kev sib tov, uas feem ntau xav tau Mooney viscosity ntawm kwv yees li 60, thiab roj hmab so, uas xav tau Mooney viscosity ntawm kwv yees li 40, Txwv tsis pub, nws yuav tsis tuaj yeem ua haujlwm tau zoo. Qee cov nplaum nyoos yog tawv heev, muaj viscosity siab, thiab tsis muaj cov khoom yooj yim thiab tsim nyog - plasticity zoo. Yuav kom ua tau raws li cov kev cai ntawm cov txheej txheem, cov roj hmab nyoos yuav tsum tau plasticized kom txiav tawm cov saw hlau molecular thiab txo qhov hnyav molecular hauv qab kev kho tshuab, thermal, tshuaj lom neeg thiab lwm yam kev ua. Ib qho yas compound uas ib ntus poob nws cov elasticity thiab ua mos thiab malleable. Nws tuaj yeem hais tias cov roj hmab nyoos molding yog lub hauv paus ntawm lwm cov txheej txheem thev naus laus zis.
Lub hom phiaj ntawm cov roj hmab nyoos molding yog: ua ntej, kom tau txais qee qib ntawm plasticity rau cov roj hmab nyoos, ua rau nws tsim nyog rau kev sib tov, dov, extrusion, tsim, vulcanization, nrog rau cov kev xav tau ntawm cov txheej txheem xws li roj hmab slurry thiab daim txhuam cev roj hmab tsim; Qhov thib ob yog homogenize lub plasticity ntawm cov roj hmab nyoos kom tsim tau cov khoom siv roj hmab nrog cov khoom zoo sib xws.
Tom qab ua kom yas, cov khoom siv lub cev thiab tshuaj ntawm cov roj hmab nyoos kuj hloov pauv. Vim yog lub zog kho tshuab muaj zog thiab oxidation, cov qauv molecular thiab qhov hnyav molecular ntawm roj hmab yuav hloov pauv mus rau qee qhov, yog li cov khoom siv lub cev thiab tshuaj kuj yuav hloov pauv. Qhov no yog qhia tau tias muaj kev txo qis ntawm elasticity, kev nce ntxiv ntawm plasticity, kev nce ntxiv ntawm solubility, kev txo qis ntawm viscosity ntawm cov kua roj hmab, thiab kev txhim kho hauv kev ua tau zoo ntawm cov roj hmab. Tab sis raws li qhov plasticity ntawm cov roj hmab nyoos nce ntxiv, lub zog kho tshuab ntawm cov roj hmab vulcanized txo qis, qhov deformation tas mus li nce ntxiv, thiab kev tiv thaiv hnav thiab kev laus tiv thaiv ob qho tib si txo qis. Yog li ntawd, kev ua kom yas ntawm cov roj hmab nyoos tsuas yog pab tau rau cov txheej txheem ua roj hmab, thiab tsis zoo rau kev ua tau zoo ntawm cov roj hmab vulcanized.
Lub sijhawm tshaj tawm: Lub Xya Hli-26-2023
