Cov neeg yuav tau laus thiab roj hmab yuav muaj hnub nyoog. Tom qab siv cov roj hmab ntev ntev, ib txhia yuav ua mos thiab nplaum, thiab qee leej yuav haj yam quab yuam. Nyob rau hauv rooj plaub no, tus thawj tseem ceeb thiab lub zog ntawm cov roj hmab yog qhov zoo tshaj qhov txo qis, thiab tawg, chalking, heev, thiab mildew kuj ua rau. Kev laus yog qhov tshwm sim ntawm cov kev hloov hauv cov roj hmab qauv hauv cov khoom ntawm lwm yam sab nraud, qhov feem ntau uas yog thermal aging ntawm tshav kub thiab oxygen.
Oxidation yog ib qho tseem ceeb rau kev siv roj hmab laus. Cov pa oxygen nyob hauv cov khoom siv roj hmab uas muaj cov roj hmab cov roj hmab cov roj hmab, thiab cov yeeb yaj kiab molecular tawg lossis khuam khaus, ua rau muaj kev hloov hauv cov khoom siv roj hmab. Ozone yog ntau yam sib xyaw ua pa tshaj oxygen thiab ua rau cov roj hmab ntau dua.
Ua kom kub kuj ua rau thermal cracking los yog thermal crosslinking ntawm roj hmab, tab sis qhov pib siv hluav taws xob yog pib ua. Ua kom cov pa oxygen diffusion thiab activating oxidation cov tshuaj tiv thaiv kom ceev cov oxidation fab ntawm cov roj hmab yog ib qho teeb meem ntawm thermal oxygen kev laus. Ultraviolet rays kuj muaj cov nyhuv ntawm cov roj hmab. Ntxiv rau qhov ncaj qha ua qhov tawg tsam thiab kev sib txuas ntawm rubber roj hmab chains, roj hmab absorbs zog lub zog los ua cov dawb radicals, uas pib thiab accelerates cov txheej txheem oxidation chain reaction. Tsis tas li ntawd, txhua yam kev ntxhov siab, kev ruaj ntseg, tshuaj lom neeg, cov hlau ions, cov hluav taws xob hluav taws xob, hluav taws xob thiab biology tuaj yeem daib lub hnub nyoog.
Txawm hais tias laus ntawm rubber tsis tau tag nrho kev zam, nws yuav qeeb. Qhov kev phom sij thiab yooj yim tshaj plaws yog ntxiv rau cov neeg laus los tiv thaiv kev laus. Tus neeg laus tuaj yeem tuaj yeem ntes cov khoom siv thaum lub sij hawm thermal aging ntawm rubber, uas tiv thaiv cov roj hmab.