Cov txheej txheem txhuas plating ntawm cov yas zaj duab xis feem ntau siv cov txheej txheem plating ncaj qha, uas yog, txheej txheej txhuas yog ncaj qha plated rau saum npoo ntawm substrate zaj duab xis. BOPET thiab BOPA zaj duab xis substrates tuaj yeem ncaj qha evaporated yam tsis muaj kev kho saum npoo ua ntej txhuas plating. Rau BOPP, CPP, PE thiab lwm yam uas tsis yog-polar yas zaj duab xis, corona kho los yog nplaum txheej yuav tsum tau siv rau cov zaj duab xis nto ua ntej evaporation kom nws nto nro ncav cuag 38-42 dyne / cm los yog muaj zoo adhesion. Thaum lub sij hawm evaporation, muab yob zaj duab xis rau hauv lub tshuab nqus tsev chamber, kaw lub tshuab nqus tsev chamber thiab lub tshuab nqus tsev vacuum. Thaum lub tshuab nqus tsev kawm ntawv nce mus txog ib qho nqi (4) × Thaum qhov kub siab tshaj 10-4mba, lub nkoj evaporation yog rhuab mus rau 1300 degree ~ 1400 degree, thiab tom qab ntawd cov txhuas hlau nrog purity ntawm 99.9% txuas ntxiv mus rau lub nkoj evaporation. Kho lub unwinding ceev, winding ceev, xaim pub ceev thiab evaporation muaj peev xwm, tig rau lub txias qhov chaw, thiab ua rau cov txhuas hlau yaj thiab evaporate tsis tu ncua ntawm lub nkoj evaporation, thiaj li tsim ib tug kaj txhuas txheej ntawm lub tsiv zaj duab xis nto tom qab txias. , uas yog, aluminium plated zaj duab xis.
Txoj cai ntawm lub tshuab nqus tsev vacuum
Nruab cov khoom siv zaj duab xis coated (cylindrical) nyob rau hauv lub tshuab nqus tsev vacuum evaporation thiab nqus nws nrog lub tshuab nqus tsev twj tso kua mis kom lub tshuab nqus tsev degree hauv txheej txheej ncav cuag 1.3 × 10－2-1.3 × 10-3pa, cua sov Lub crucible rau yaj thiab evaporate lub high-purity txhuas hlau rau hauv gaseous txhuas ntawm qhov kub ntawm 1200 degree ~ 1400 degree. Gaseous aluminium particles tso rau saum npoo ntawm cov zaj duab xis txav mus rau substrate thiab tsim ib qho txuas ntxiv thiab ci hlau txhuas txheej tom qab txias thiab txo. Lub thickness ntawm aluminium plating txheej yog tswj los ntawm kev tswj cov evaporation ceev ntawm hlau aluminium, txav ceev ntawm zaj duab xis substrate thiab lub nqus tsev kawm ntawv ntawm txheej chamber. Feem ntau, lub thickness ntawm aluminium plating txheej yog 25 ~ 500nm thiab qhov dav ntawm aluminium plating zaj duab xis yog 800mm ~ 2000mm.
Txoj kev evaporation: muaj ob txoj hauv kev kom evaporate txhuas ntawm lub substrate nto: ncaj qha evaporation txoj kev thiab hloov txoj kev.
(1) Direct evaporation txoj kev. Nws yog evaporate cov hlau txhuas rau ntawm qhov chaw ntawm lub substrate ncaj qha los ntawm lub tshuab nqus tsev txheej los ua ib qho txhuas txheej zaj duab xis. Txoj kev evaporation ncaj qha muaj qhov yuav tsum tau ua rau lub substrate, tshwj xeeb tshaj yog tsim cov yeeb yaj kiab hlau ci rau ntawm qhov chaw, lub substrate yuav tsum muaj qhov zoo ntawm qhov smoothness. Yog hais tias daim ntawv saum npoo yog ntxhib, txoj kev ncaj qha evaporation yuav tsum tau saws, thiab txheej txheej yuav tsum tau nqa tawm ua ntej aluminium plating. Tsis tas li ntawd, cov volatiles ntawm lub substrate yuav tsum tsawg dua nyob rau hauv cov txheej txheem evaporation. Yog li ntawd, txoj kev ncaj qha evaporation muaj kev txwv loj ntawm lub substrate. Nws yog tsim nyog rau evaporation ntawm yas zaj duab xis thiab ntawv. Txawm li cas los xij, daim ntawv muaj cov kev xav tau zoo thiab muaj qee qhov txwv ntawm cov ntawv ntau.
(2) Hloov txoj kev. Aluminium plating zaj duab xis yog tsim los ntawm kev xa cov hlau txhuas txheej mus rau saum npoo ntawm lub substrate nrog kev pab los ntawm cov cab kuj zaj duab xis (lub tshuab nqus tsev aluminium plating zaj duab xis). Txoj kev hloov pauv yog txheej txheem tshiab tsim los ntawm txoj kev ncaj qha evaporation. Nws overcomes cov kev txwv ntawm ncaj qha evaporation txoj kev ntawm cov kev cai ntawm substrate. Nws yog tshwj xeeb tshaj yog haum rau txhuas plating rau txhua yam ntawm daim ntawv thiab ntawv, thiab kuj siv tau rau txhuas plating ntawm yas zaj duab xis. Txoj kev hloov pauv tau siv rau cov khoom siv aluminized ntawm daim ntaub, fiber ntau, tawv thiab lwm yam substrates txawv teb chaws. Tuam Tshoj tsuas yog siv txoj kev hloov pauv los tsim cov ntawv aluminized.
Cov txheej txheem ntau lawm ntws ntawm aluminized zaj duab xis:
Lub hauv paus khoom siv unwinding → nqus twj tso kua mis → cua sov evaporation nkoj → txhuas hlau pub → evaporation → txias → thickness ntsuas → flattening → winding