Cov tais ntawv thiab ib puag ncig- cov khoom lag luam zoo nkauj muaj xws li cov tais qe, cov tais txiv hmab txiv ntoo, cov ntawv xov tooj ntawm tes, cov tais ntawv cov khoom ua si, cov ntaub ntawv pov tseg, thiab lwm yam. Nws siv cov ntawv pov tseg ua cov khoom siv raw, ntxiv qee cov dej noo- pov thawj tus neeg saib xyuas (aluminium sulfate) los yog cov dej tsis zoo, thiab tom qab ntawd ua rau ntau yam duab, kev tiv thaiv cov khoom lag luam thiab kev ua tau zoo raws li qhov sib txawv.
Kev ua haujlwm ntawm cov khoom ntim ntawv yog kom muaj thiab tiv thaiv cov khoom ntim khoom, uas yooj yim thiab siv tau.
Xws li thiab tiv thaiv cov khoom ntim khoom yog lub luag haujlwm tseem ceeb ntawm cov khoom ntim ntawv. Cov khoom txhawb nqa ntawv yuav tsum muaj peev xwm ntseeg tau cov khoom ntim tau teev tseg los ntawm lub pob, kom cov khoom ntim tsis puas thaum lub sijhawm thauj mus los, thauj khoom, tshem tawm, thiab siv, thiab ua tau raws li qhov xav tau ntawm lub zog, rigidity thiab stability. Cov ntaub ntawv siv hauv cov ntawv txhawb nqa khoom kuj tseem muaj kev nyab xeeb rau cov khoom ntim, thiab tsis muaj kev cuam tshuam ntawm ob.
Tsis tas li ntawd, cov khoom txhawb nqa ntawv siv nws cov qauv tshwj xeeb rau deform thaum thauj khoom kom ntev lub sijhawm sib xws thiab nqus cov zog sab nraud, yog li txo qhov cuam tshuam thiab kev co ntawm cov khoom ntim. Nws yog qhov sib txawv ntawm cov txheej txheem cushioning ntawm cov khoom ntim yas ntim khoom, vim tias cov khoom ua npuas ncauj muaj cov cushioning zoo vim tias muaj coob tus compressible hlwb faib rau hauv cov khoom, tsis hais cov khoom zoo li cas. Yog tias cov ntaub ntawv yas zaj duab xis thiab cov yas ua npuas dej siv los ua lub dav hlau loj, nws pom tseeb tias yav dhau los tuaj yeem cushioned, thaum lub tom kawg tsis tuaj yeem cushioned.
Yog li ntawd, rau cov khoom txhawb nqa ntawv, cov qauv tsim qauv zoo yog qhov yooj yim lav rau kev tiv thaiv cov ntsiab lus thiab kev txhim kho ntawm kev poob siab absorbing peev xwm thaum thauj thiab tuav. Cov qauv tsim kev ua tau zoo yuav cuam tshuam ncaj qha rau lub zog, rigidity, stability thiab practicability ntawm lub pob, uas yog, cov qauv ntawm cov ntaub ntawv txhawb cov khoom ncaj qha cuam tshuam rau lub realization ntawm nws ntim muaj nuj nqi.
