Kev nthuav dav polystyrene yog ib qho ntawm cov khoom siv nrov tshaj plaws uas siv hauv kev tsim kho tshiab rau kev ua kom zoo thermal rwb thaiv tsev ntawm txhua qhov chaw nyob thiab chaw ua lag luam.
Nws muaj kev nyab xeeb hais tias kev lag luam tsim kho niaj hnub tsis tuaj yeem muab cov tshuaj zoo dua thiab pheej yig dua los tiv thaiv cov vaj tse los ntawm lub caij txias dua li nthuav cov kab ntau polystyrene. Ntxiv nrog rau qhov tseeb tias cov khoom siv no hnyav thiab hnav tau ntev, nws tseem muaj ntau qhov tsis zoo thiab qhov zoo.
Cov yam ntxwv ntawm kev nthuav dav polystyrene
Sab nraud, nthuav polystyrene yog cov khoom siv dawb nrog cov qauv ua npuas dej uas muaj 98% huab cua thiab 2% polystyrene. Cov txheej txheem tsim tawm ntawm cov khoom siv no muaj nyob rau hauv ua npuas ncauj ntawm polystyrene granules thiab lawv cov kev kho mob nrog cov pa taws kub. Cov txheej txheem no tau rov ua dua ob peb zaug hauv kev tsim cov tshuaj polystyrene, uas ua rau cov khoom siv tsawg dua ntom thiab ntais.
Tom qab kho cov pa, cov ntaub ntawv nyoos tau qhuav, rau qhov tshwj xeeb uas siv cov ziab qhuav siv. Tom qab ziab, cov khoom tshwm sim tau npaj rau siv. Raws li cov kws tshaj lij, nthuav tawm polystyrene pom tau tias yog qhov zoo tshaj plaws, muaj cov pob zeb loj (cov pob dawb) ntawm cov qauv uas yog thiab qhov loj me ib yam nkaus.
Qhov zoo ntawm cov khoom siv
Lub ntsiab zoo ntawm kev nthuav dav polystyrene yog nws lub zog zoo rwb thaiv tsev thermal. Nrog rau txoj kev ua kom zoo, cov khoom siv no ua ib txoj hauv kev txhim khu kev tiv thaiv kom tsis txhob txias nkag.
Kev siv ntawm kev nthuav dav polystyrene raws li rwb thaiv tsev tshem tawm qhov xav tau kev ua haujlwm ntxiv los tiv thaiv qhov chaw sab hauv ntawm chav tsev los ntawm cov suab nrov nkag los ntawm sab nraud. Hauv lwm lo lus, nthuav polystyrene yog ib qho zoo tshaj plaws kev ua haujlwm suab thiab kom paub tseeb txog qhov no, nws txaus los nruab ib txheej txheej ntawm cov khoom tsuas yog 2-3 cm tuab ntawm phab ntsa. Nws tseem yuav tsum tau sau tseg tias nthuav polystyrene kuj yog ib qho zoo cua. khoom siv.
Ntawm qhov zoo ntawm nthuav dav polystyrene cov laug cam, ib tus tsis tuaj yeem nco ntsoov lawv cov dej nqus dej tsawg (hygroscopicity). Cov ntaub ntawv tsis ntub dej txawm tias thaum noo noo nkag rau nws ncaj qha, yog li tsis tas yuav muaj kev tiv thaiv phab ntsa ntxiv. Raws li txoj cai, nws yog qhov ua tau rau "sheathe" lub tsev nrog siding lossis block-lub tsev tam sim ntawd tom qab kev teeb tsa ntawm nthuav polystyrene daim hlau.
Vim nws cov qauv tshwj xeeb, nthuav dav polystyrene tuaj yeem tiv taus qhov pom tseeb siab ntev rau lub sijhawm ntev. Ntawm lwm yam, cov khoom siv no ruaj khov heev thiab tuaj yeem pab rau ntau ntau xyoo lawm.
Qhov khuam
Zoo li txhua yam khoom siv hauv kev tsim kho, nthuav cov polystyrene muaj nws cov qhov tsis zoo. Ua ntej tshaj plaws, peb tab tom tham txog nws cov kev tsis huv. Kev nthuav dav polystyrene tuaj yeem yooj yim zes thiab tib lub sijhawm tso tawm "tag nrho pawg" ntawm cov khoom lom. Txhawm rau tiv thaiv lub tsev tiv thaiv nrog polystyrene los ntawm hluav taws, txhua txoj cai kev nyab xeeb hluav taws yuav tsum ua raws li kev cai.
Qhov tsis zoo thib ob ntawm polystyrene yog nws qhov kev tawm tsam tsawg rau ultraviolet hluav taws xob, yog li ntawd, cov phiaj ntawm cov khoom no yuav tsum muaj kev tiv thaiv los ntawm tshav ntuj ncaj qha.
