ABS ntawv, cov khoom siv thermoplastic sib xyaw ua ke ntawm acrylonitrile, butadiene, thiab styrene, tau dhau los ua cov khoom tseem ceeb hauv ntau qhov kev lag luam vim nws qhov kev ua tau zoo. Cov khoom siv no sib xyaw ua ke qhov zoo ntawm nws peb yam: acrylonitrile muab cov tshuaj tiv thaiv zoo heev thiab tawv tawv, butadiene txhim khu kev cuam tshuam rau qhov hnyav txawm tias qhov kub thiab txias, thiab styrene ua kom muaj kev ua haujlwm zoo thiab ua kom zoo nkauj. Xws li ib tug tshwj xeeb muaj pes tsawg leeg ua rau ABS daim ntawv haum rau daim ntaub ntawv xws li los ntawm automotive tha xim sab hauv thiab hluav taws xob ntaus ntawv vaj tse rau ntim cov ntaub ntawv thiab cov khoom siv. Tsis zoo li ib qho - cov khoom siv yas, ABS daim ntawv zam qhov tsis zoo ntawm lub hauv paus ntawm brittleness los yog cov cua sov tsis zoo, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov xwm txheej xav tau.
Yuav kom nkag siab tag nrho ABS daim ntawv, nws yog ib qho tseem ceeb rau delve rau hauv nws cov khoom tseem ceeb. Ua ntej, nws cov tshuab ua haujlwm tau zoo kawg nkaus -nrog lub zog tensile ntawm 30-50 MPa thiab lub zog cuam tshuam (notched Izod) ntawm 10-30 kJ / m², nws ua tau zoo tshaj ntau yam khoom siv yas hauv cov khoom siv kho tshuab. Thib ob, nws cov thermal stability tso cai rau nws ua haujlwm tsis tu ncua ntawm qhov kub ntawm -20℃thiab 80 degree, thiab nws muaj Vicat softening point ntawm 90-110 degree, kom ntseeg tau tias qhov chaw ruaj khov nyob rau hauv nruab nrab cua sov. Chemically, ABS ntawv yog resistant rau feem ntau qaug zog acids, alkalis, thiab organic solvents xws li cawv thiab esters, tab sis nws yuav o nyob rau hauv muaj zog solvents zoo li ketones. Tsis tas li ntawd, nws cov hluav taws xob rwb thaiv tsev ua tau zoo heev, nrog rau qhov ntim ntawm 10¹⁴-10¹⁶ Ω·cm, ua rau nws zoo tagnrho rau hluav taws xob rwb thaiv tsev qhov chaw. Cov khoom no sib sau ua ke tsim lub hauv paus rau kev siv dav ntawm ABS ntawv.
Cov txheej txheem tseem ceeb ntawm ABS daim ntawv ncaj qha txiav txim siab nws qhov zoo thiab kev ua haujlwm, thiab tag nrho cov haujlwm ua haujlwm tuaj yeem muab faib ua plaub theem tseem ceeb. Thawj theem yog raw khoom npaj thiab sib tov. High-purity acrylonitrile, butadiene roj hmab, thiab styrene monomers yog tov nyob rau hauv ib qho piv txwv (feem ntau 20-30% acrylonitrile, 10-20% butadiene, thiab 50-70% styrene) thiab ntxiv nrog rau kev hloov kho xws li cov xim thiab cov tshuaj tiv thaiv kab mob. Qhov sib tov no ces nplawm rau hauv lub tshuab hluav taws xob ceev ntawm 80-100℃rau 10-15 feeb kom ntseeg tau tias cov khoom sib txawv tsis sib xws, tiv thaiv kev ua haujlwm tsis sib xws hauv daim ntawv ABS kawg. Qhov thib ob theem yog extrusion molding, cov kauj ruam tseem ceeb tshaj plaws hauv kev tsim ABS ntawv. Cov khoom sib xyaw ua ke yog muab tso rau hauv ib qho ntxaib-ntsia hlau extruder, qhov chaw uas lawv tau yaj thiab yas ntawm qhov kub ntawm 160-230℃(qhov chaw pub mis ntawm 160-180 degree, seem melting ntawm 180-210 degree, thiab seem homogenizing ntawm 210-230 degree). Cov khoom molten yog ces extruded los ntawm ib tug ca tuag nrog ib tug meej qhov sib txawv, thiab lub thickness ntawm daim ntawv extruded yog tswj los ntawm kev kho qhov sib txawv tuag thiab qhov ceev ntawm lub rub roller.
Qhov thib peb theem ntawm ABS daim ntawv ntau lawm yog txias thiab shaping. Daim ntawv kub extruded yog tam sim ntawd xa mus rau peb -roller calender lossis lub tank dej txias kom txias sai. Peb lub -roller calender siv qhov kub thiab txias- tswj cov chais (feem ntau yog 50-70 degree) los nias thiab txias rau daim ntawv, kom ntseeg tau tias flatness thiab tuab tuab; lub tank dej txias txais cov dej ntws los ua kom cov ntawv txias rau hauv chav tsev kub, tiv thaiv thermal deformation. Tom qab txias, daim ntawv nkag mus rau theem plaub: trimming, txiav, thiab kev soj ntsuam zoo. Cov npoo ntawm daim ntawv yog txiav los ntawm lub tshuab txiav kom tshem tawm qhov tsis sib xws, thiab tom qab ntawd nws raug txiav rau hauv cov qauv loj raws li cov neeg siv khoom xav tau. Kev tshuaj xyuas zoo suav nrog kev ntsuas qhov sib txawv ntawm qhov sib txawv (yuav tsum nyob rau hauv ± 0.1mm rau cov ntawv siab precision), cuam tshuam lub zog, tensile lub zog, thiab nto flatness. Cov khoom tsim nyog ABS cov ntawv yog tom qab ntawd ntim thiab muab tso rau hauv cia.
Hauv kev siv tswv yim, kev ua haujlwm ntawm ABS daim ntawv tuaj yeem ua kom zoo ntxiv los ntawm cov txheej txheem hloov kho. Piv txwv li, ntxiv cov iav fiber ntau tuaj yeem txhim kho nws lub zog tensile thiab kub tsis kam, ua rau nws haum rau cov khoom siv; Kev sib xyaw nrog PVC tuaj yeem txhim kho cov nplaim hluav taws, nthuav dav siv hauv hluav taws xob thiab kev tsim kho. Kev nkag siab txog cov khoom siv thiab cov txheej txheem tsim khoom ntawm ABS daim ntawv yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog thiab ua kom zoo rau daim ntawv thov. Raws li kev lag luam txuas ntxiv xav tau cov ntaub ntawv ua tau zoo dua, ABS ntawv, nrog nws cov khoom kho tau thiab cov txheej txheem tsim tawm, yuav tuav nws txoj haujlwm tseem ceeb hauv kev lag luam thermoplastic. Txawm hais tias nyob rau hauv kev tsim khoom ib txwm muaj lossis kev lag luam tawm tshiab xws li 3D luam ntawv thiab lub tsev ntse, ABS daim ntawv yuav txuas ntxiv mus ua lub luag haujlwm tseem ceeb, tsav kev tsim kho tshiab thiab kev txhim kho hauv cov haujlwm muaj feem xyuam.