Hauv kev ua haujlwm ntawm cov yas yas, ABS thiab ASA cov ntawv zoo li cov kwv tij ntxaib, tab sis txhua tus ua haujlwm rau lub hom phiaj sib txawv. Tus qub tau paub txog nws tus nqi -kev ua tau zoo thiab tawv tawv hauv cov ntawv thov sab hauv tsev, thaum lub sijhawm tom kawg ua rau cov ntawv thov sab nraum zoov vim nws huab cua tsis kam. Txawm hais tias tsuas yog ib qho - tsab ntawv sib txawv hauv lawv cov npe, lawv qhov kev ua tau zoo thiab cov xwm txheej siv tau txawv txav, xav tau kev xaiv meej raws li cov kev xav tau tseem ceeb thiab qhov sib txawv tseem ceeb.
Kev sib xyaw ua ke sib txawv txiav txim siab lawv qhov kev ua tau zoo. ABS yog polymerized los ntawm acrylonitrile, butadiene, thiab styrene. Butadiene roj hmab tivthaiv muab nws zoo heev toughness thiab zoo heev cuam tshuam kuj. ASA, ntawm qhov tod tes, hloov butadiene nrog acrylate. Qhov kev hloov kho no ua rau nws zoo tshaj huab cua tiv thaiv, ua rau nws muaj txiaj ntsig zoo rau qhov hnyav sab nraum zoov. Qhov kev hloov pauv no yog zoo li muab cov khoom siv "tiv thaiv txheej", tab sis nws kuj ua rau ASA 10-20% tawv dua li ABS thiab kwv yees li 20% -30% kim dua.
Huab cua tsis kam yog qhov kev xaiv tseem ceeb tshaj plaws. Cov tshuaj butadiene hauv ABS yog yooj yim degraded los ntawm ultraviolet hluav taws xob. Tom qab tsuas yog rau lub hlis ntawm kev siv sab nraum zoov, nws tuaj yeem pom cov xim tsis zoo thiab qhov chaw chalking, thiab qhov ntev ntev tuaj yeem ua rau brittleness thiab tawg. Ib txoj haujlwm kos npe rau sab nraum zoov tau ntsib cov ntawv tsis pom kev thiab cov npoo tawg hauv tsawg dua ib xyoos vim yog siv cov ntawv ABS tsis raug. ASA, txawm li cas los xij, tuaj yeem tswj hwm kev ua haujlwm ruaj khov rau ntau tshaj 5 xyoos hauv kev hloov hnub ci thiab nag, nrog cov xim degradation tsawg dua 5%. Kev siv sab nraum zoov xws li tsheb sab nrauv thiab cov khoom vaj khoom vaj khoom tsev yuav luag tsuas yog nws cov npe.
Hauv kev teeb tsa sab hauv tsev, ABS tus nqi -kev ua tau zoo ci. Nws muaj qhov zoo ntawm cov dej ntws zoo thiab yuav tsum tau ua haujlwm kub tsuas yog 180-240 degree, tso cai rau molding ntawm cov txheej txheem nyuaj nrog cov cuab yeej zoo tib yam. Cov ntsiab lus xws li cov tav zoo thiab cov buckles ntawm cov khoom siv hluav taws xob tuaj yeem raug tsim dua. LEGO cov khoom ua si thiab TV casings, ntawm lwm yam khoom siv sab hauv tsev, feem ntau siv ABS, kom ntseeg tau tias muaj kev cuam tshuam thiab hnav tsis kam thaum tswj cov nqi tsim khoom. Yog tias qhov yooj yim ntawm kev ua haujlwm thiab tus nqi sib npaug yog qhov tseem ceeb, thiab tsis tas yuav muaj kev cuam tshuam sab nraum zoov, ABS yog qhov kev xaiv pom tseeb.
Rau kev siv sab nraum zoov, ASA yog tib txoj kev xaiv. Ntxiv nrog rau UV tsis kam, ASA tsim cov ntxhiab tsw tsawg thaum ua haujlwm thiab muaj kev pheej hmoo tsawg dua ntawm kev sib tsoo dua li ABS, ua rau nws tsim nyog rau kev tsim khoom loj sab nraum zoov. Txawm hais tias ASA xav tau kev ua haujlwm siab dua ntawm 200-260℃thiab nruj kom qhuav (qhuav ntawm 85-}95℃rau 4-6 teev), nws muaj kev ruaj ntseg mus ntev. Lub chaw nres tsheb them nyiaj sab nraum zoov ntawm lub tsheb tshiab lub zog siv ASA cov ntaub ntawv, thiab tom qab peb xyoos ntawm kev cuam tshuam rau cov ntsiab lus, nws tsis pom muaj cov cim tseem ceeb ntawm kev laus, zoo dua rau ib xyoos hloov pauv ntawm ABS lwm txoj.
Kev suav nqi yuav tsum xav txog tag nrho lub neej voj voog. ASA muaj tus nqi pib yuav ntau dua, tab sis nws tsis tas yuav hloov pauv lossis kho qhov chaw sab nraum zoov; thaum ABS yog pheej yig dua, cov nqi hloov pauv rau kev siv sab nraum zoov yuav offset thawj zaug txuag nyiaj. Tsis tas li ntawd, ABS tuaj yeem suav nrog 20-30% cov khoom siv rov ua dua tshiab, thaum feem ntawm cov khoom siv rov ua dua tshiab ASA yuav tsum tswj tsis pub dhau 10%, txwv tsis pub nws cov huab cua tiv thaiv yuav txo qis, uas tseem cuam tshuam rau kev npaj nqi mus sij hawm ntev.
Nyob rau hauv luv luv, lub hauv paus ntawm kev xaiv nyob rau hauv sib piv cov scenario thiab yuav tsum tau: rau purely siv sab hauv tsev, siab toughness, thiab tus nqi tswj, xaiv ABS; rau kev siv sab nraum zoov uas xav tau kev ua haujlwm ntev thiab kev laus, xaiv ASA. Los ntawm kev ua raws li lub hauv paus ntsiab lus no, kev ua haujlwm ntawm cov khoom siv thiab kev siv cov kev xav tau tuaj yeem ua tau zoo kawg nkaus.
