Yuav kom ua tiav cov txiaj ntsig zoo tshaj plaws, yuav tsum xav txog ntau yam, suav nrog:
1. Hom chav kho thiab qhov xwm txheej zoo tagnrho: qhov ceev thiab qhov ntau ntawm cua kub los ntawm lub tshuab cua sov thiab qhov av; hauv av thiab ob lossis ntau sab ntawm chav kho muaj cua kub txaus thiab sib npaug; qhov sib txawv me me ntawm qhov kub tiag tiag thiab qhov kub teem, thiab kev khaws cia cua sov thiab cov khib nyiab tawm ua tau raws li qhov xav tau; cov yob zaj duab xis yooj yim txav thiab nqa.
2. Cov khoom ua tau raws li cov kev thov kev txawj ntse.
3. Cov haujlwm, tus nqi corona, kev tiv taus cua sov, thiab lwm yam ntawm cov lamination fims.
4. Cov nplaum: cov nplaum uas muaj kuab tshuaj, cov nplaum uas tsis muaj kuab tshuaj, cov nplaum uas muaj ib los yog ob qho sib xyaw ua ke hauv dej, cov nplaum kub yaj, thiab lwm yam.
Daim ntawv no feem ntau tsom mus rau cov yeeb yaj kiab lamination thiab cov nplaum.
1. Cov Yeeb Yaj Kiab Lamination
Qhov kev ua tau zoo ntawm lub cev, kev tiv taus cua sov thiab kev thaiv ntawm PE zaj duab xis, uas siv dav dav, yuav zoo dua, thaum qhov ceev ntawm PE nce. PE zaj duab xis nrog tib qhov ceev tab sis cov txheej txheem tsim khoom sib txawv muaj kev ua tau zoo sib txawv.
CPE tuaj yeem txias sai, nrog rau qhov crystallinity qis, pob tshab siab thiab turbidity qis. Tab sis kev npaj molecular tsis sib xws, ua rau nws tsis zoo barrier performance, uas yog high transmittance. Thiab nws zoo ib yam li LDPE. Yog li ntawd, qhov kub kho yuav tsum tsis txhob siab dhau thaum siv PE zaj duab xis. Thaum lub cua sov tiv thaiv ntawm PE zoo dua, qhov kub kho tuaj yeem siab dua.
2. Cov nplaum
2.1 EthylCov nplaum raws li
Raws li kev ua tau zoo ntawm cov yeeb yaj kiab lamination thiab cov nplaum, cov xwm txheej kho tuaj yeem muab faib ua ntau theem sib txawv:
1. Kub 35℃, lub sijhawm 24-48 teev
2. Kub 35-40℃, lub sijhawm 24-48 teev
3. Kub 42-45℃, lub sijhawm 48-72 teev
4. Kub 45-55℃, lub sijhawm 48-96 teev
5. Tshwj xeeb, kub tshaj 100℃, lub sijhawm raws li kev txhawb nqa kev txawj ntse.
Rau cov khoom lag luam feem ntau, xav txog qhov ceev, tuab, tiv thaiv kev thaiv, kev ua haujlwm tiv taus cua sov ntawm cov yeeb yaj kiab nrog rau qhov loj ntawm lub hnab, qhov kub kho yuav tsum tsis txhob siab dhau. Feem ntau, 42-45℃lossis qis dua yog txaus, lub sijhawm 48-72 teev.
Cov yeeb yaj kiab lamination sab nraud, uas xav tau kev ua haujlwm siab thiab tiv taus cua sov zoo yog qhov tsim nyog rau kev kho kub siab, zoo li ntau dua 50℃. Cov yeeb yaj kiab sab hauv, zoo li PE lossis CPP kub sealing, yog tsim rau 42-45℃, lub sijhawm kho yuav ntev dua.
Cov khoom ua kom npau lossis rov ua dua, uas xav tau kev ua haujlwm siab thiab tiv taus cua sov siab, yuav tsum ua raws li cov xwm txheej kho uas lub Hoobkas nplaum muab.
Lub sijhawm kho yuav tsum raws li qhov ua tiav ntawm cov tshuaj tiv thaiv, kev sib txhuam coefficient thiab kev ua haujlwm sealing kub.
Cov khoom tshwj xeeb yuav xav tau qhov kub kho siab dua.
2.2 Cov nplaum tsis muaj kuab tshuaj
Yog tias kev ua haujlwm sealing ua tau raws li qhov yuav tsum tau ua, rau cov khoom laminating tsis muaj kuab tshuaj, uas cov yeeb yaj kiab sab hauv muaj qhov ceev tsawg, cov nplaum muaj ntau cov monomers dawb, ua rau nws nyuaj rau kaw. Yog li ntawd, kev kho kub qis yog qhov pom zoo, rau 38-40℃.
Yog tias qhov kev ua tiav ntawm cov tshuaj tiv thaiv ua tau raws li qhov yuav tsum tau ua, yuav tsum xav txog lub sijhawm kho ntev dua.
Yog tias cov yeeb yaj kiab kaw cua sov muaj qhov ceev ceev, qhov kub kho yuav tsum yog 40-45℃. Yog tias qhov ua tiav ntawm kev ua tiav ntawm cov tshuaj tiv thaiv thiab kev ua haujlwm ntawm kev kaw cua sov xav tau kev txhim kho, lub sijhawm kho yuav tsum ntev dua.
Kev ntsuam xyuas nruj me ntsis yog qhov yuav tsum ua ntej ua ntau yam khoom, kom ntseeg tau tias zoo.
Tsis tas li ntawd xwb, yuav tsum xav txog qhov av noo. Tshwj xeeb tshaj yog thaum lub caij ntuj no qhuav, qhov av noo kom txaus tuaj yeem ua rau cov tshuaj tiv thaiv sai dua.
2.3 Cov Nplaum Uas Siv Dej
Thaum laminating VMCPP, lub tshuab lamination yuav tsum qhuav txaus, lossis cov txheej aluminized yuav raug oxidized. Thaum lub sijhawm kho, qhov kub yuav tsum tsis txhob siab dhau lossis qis dhau. Qhov kub siab yuav ua rau muaj kev sib txhuam siab.
2.4 Cov Nplaum Kub Yaj
Feem ntau xaiv kev kho kom zoo nkauj ntuj, tab sis kev ua tau zoo ntawm kev nplaum tom qab yaj yuav tsum tau pom.
3. Tswj Xyuas Kub Kom Zoo
Raws li kev tshawb fawb, ntawm qhov ntawm qhov kev ua haujlwm ntawm cov tshuaj tiv thaiv, yuav luag tsis muaj kev ua haujlwm hauv qab 30℃. Tshaj 30℃, txhua 10℃siab dua, qhov kev ua haujlwm ntawm cov tshuaj tiv thaiv zoo dua li 4 zaug. Tab sis nwsTsis yog qhov tseeb los txhim kho qhov kub thiab txias kom ua kom nrawm dua qhov kev ua teb tsis pom kev, ntau yam yuav tsum tau pom：qhov nrawm ntawm cov tshuaj tiv thaiv tiag tiag, kev sib txhuam coefficient thiab lub zog sealing kub.
Yuav kom ua tiav qhov zoo tshaj plaws ntawm kev kho, qhov kub kho yuav tsum tau muab faib ua ntau yam sib txawv, raws li cov yeeb yaj kiab lamination thiab cov qauv.
Tam sim no, cov teeb meem feem ntau yog raws li hauv qab no:
Ib qho, qhov kub kho qis dhau, ua rau qhov kev ua haujlwm tsis zoo, thiab cov khoom muaj teeb meem tom qab kaw lossis rhaub.
Ob, qhov kub ntawm kev kho yog siab dhau thiab zaj duab xis kub tsis nruj heev. Cov khoom no muaj kev ua haujlwm kub tsis zoo, kev sib txhuam siab thiab kev cuam tshuam tsis zoo.
4. Xaus Lus
Yuav kom ua tiav qhov kev kho kom zoo tshaj plaws, qhov kub thiab sijhawm kho yuav tsum txiav txim siab los ntawm qhov kub thiab txias ib puag ncig thiab av noo, kev ua yeeb yaj kiab thiab kev ua tau zoo ntawm cov nplaum.
Lub sijhawm tshaj tawm: Plaub Hlis-22-2021