Cov khoom txhawb nqa ntawv yog ua los ntawm cov ntawv tsis siv, uas yog pulped thiab npaj rau hauv ib qho kev xav ntawm cov tawv nqaij. Nws yog lub tshuab nqus tsev-adsorbed thiab tsim rau ntawm pwm tshwj xeeb, thiab tom qab ntawd qhuav thiab kub- nias los tsim ntau hom thiab siv.
Thawj yog tias cov khoom siv raw ntawm cov ntawv ntim ntim yog cov ntaub ntawv pov tseg, uas yuav tsis ua rau muaj kev cuam tshuam rau ib puag ncig thiab rov ua dua tshiab, thiab tseem muaj txiaj ntsig rau kev xa tawm ntawm cov khoom raws li cov chaw tsim khoom. Nws muaj ntau yam kev siv. Nrog rau kev nce qib ntawm daim ntawv pwm thev naus laus zis, cov khoom siv ua npuas dej ua cov ntim ntim tuaj yeem hloov nrog cov tais ntawv.
Qhov thib ob, nws cov nqi them nqi qis dua, cov txheej txheem ntawm cov ntawv txhawb nqa yog yooj yim dua thiab sai dua li ntawm styrofoam, lub sij hawm tsim khoom thiab lub voj voog luv luv, thiab cov nqi noj thiab cov khoom siv raw yog tsawg. Nws tsis tsim hluav taws xob zoo li qub, tsis ntshai corrosion, thiab zam kev co. Cov khoom no zoo dua li styrofoam. Hauv kev ntsuas tus nqi quab yuam, qhov deformation thiab plasticity zoo dua li cov styrofoam.
Raws li qhov yuav tsum tau muaj ntawm cov khoom sib txawv, cov ntawv tuav tuaj yeem ntxiv nrog ntau yam kev pabcuam ntxiv xws li lwm yam kev npaj kom ua tiav ntau yam haujlwm, uas yog dhau ntawm lub cev ntshiab ntawm styrofoam. Cov khoom ntim ntawv tuaj yeem muab tso ua ke thiab khaws cia kom txo tau cov nqi thauj mus los thiab khaws cia.
