Tam sim no muaj ob hom nplaum uas tsis muaj kuab tshuaj rau cov khoom sib xyaw ua ke, ib qho thiab ob qho. Cov khoom ib feem yog siv rau ntawv thiab cov ntaub tsis yog ntaub, uas tuaj yeem ua haujlwm yam tsis muaj kev sib xyaw thiab tsis tas hloov kho qhov sib piv. Cov khoom ob tuaj yeem siv rau ntau yam zaj duab xis ntim khoom yooj ywm. Raws li kev paub dhau los, nplooj ntawv no yuav piav qhia txog yuav ua li cas hloov qhov sib piv ntawm ob qho rau ntau lub hom phiaj sib txawv thiab nws ua haujlwm li cas.
Ua ntej, txoj cai sib xyaw ua ke ntawm cov solvent-free laminated binders yog tsim los.
Muaj peb yam ntawm kev sib xyaw ua ke ntawm cov nplaum laminating uas tsis muaj kuab tshuaj:
1. Sim ua kom qhov sib piv ntawm cov khoom A & B sib phim rau qhov hnyav.
Qhov sib xyaw ua ke ntawm A / B muaj qhov zoo ntawm qhov hnyav sib npaug. Piv txwv li, X yog 100A sib xyaw nrog 90B, Y yog 100A thiab 50B. Kev hloov pauv 1% ntawm B yuav ua rau muaj kev hloov pauv hnyav 1.1% ntawm A Cheebtsam ntawm X thiab 2% ntawm Y. Feem ntau, kev hloov pauv 2% ntawm qhov sib xyaw ua ke yog qhov lees txais thaum lub sijhawm tsim khoom, ua rau muaj kev hloov pauv hnyav ntawm 2.2% thiab 4%. Yog tias lawv qhov hnyav sib txawv ntau, qhov no tuaj yeem ua rau muaj cov teeb meem hauv qab no:
(1) Cov khoom A / B nyuaj rau sib tov zoo kom cov khoom sib tov tsis sib xws.
(2) Vim tsis muaj cov khoom B, lub siab ntawm lub tshuab sib tov qis dhau los xyuas kom meej tias cov dej ntws tsis tu ncua, uas ua rau cov nplaum sib txawv thiab txo qis ntawm kev tsim khoom.
2. Ze li ntawm qhov viscosity ntawm A & B Cheebtsam
Qhov viscosity qis dua ntawm cov khoom A & B ntawm qhov kub thiab txias tsim nyog, qhov zoo dua qhov sib tov. Xav txog qhov kev ua ntawm cov binder, qhov viscosity qub ntawm ob qho khoom sib txawv heev. Qhov kub yuav tsum tau tswj cais kom kho qhov viscous. Kev nce qhov kub ntawm qhov qub nrog viscosity siab dua ua rau nws nyob ze rau lwm qhov, thiab nws muaj txiaj ntsig zoo rau ob qho tib si lub cuab yeej ntsuas sib tov thiab lub twj tso zis.
3. Ua kom qhov kam rau ntawm A & B sib tov ntau ntxiv
Vim muaj qee yam sab nraud hauv kev laminating, yuav tsum muaj qee qhov kev hloov pauv hauv qhov sib xyaw ua ke. Kev nthuav dav ntawm kev kam rau siab ntawm A / B kev sib xyaw ua ke sib xyaw ua ke tuaj yeem them rov qab qhov tsis zoo ntawm qhov kev hloov pauv no. Piv txwv li, cov nplaum tsis muaj kuab tshuaj WD8118A / B ntawm cov khoom tshiab ntau ntawm qhov sib xyaw ib txwm muaj ntawm 100: 75 mus rau qhov sib xyaw ntawm 100: 60 - 85, ob qho tib si tau txais kev siv thiab tau txais tos zoo los ntawm ntau tus neeg siv khoom.
Qhov thib ob, lub hauv paus ntsiab lus thiab txoj kev sib xyaw ua ke hloov kho qhov sib piv
(1) Kho kom haum rau qhov kub thiab txias thiab av noo
Feem ntau, cov ntsiab lus ntawm NCO hauv Cheebtsam A yog siab dua, thaum qhov kev sib xyaw nrog huab cua thiab cov pa hauv zaj duab xis yog nyob rau sab laug. Txawm li cas los xij, thaum lub caij ntuj sov, thaum muaj ntau lub pa hauv huab cua thiab zaj duab xis muaj cov dej noo ntau dua, cov Cheebtsam A yuav tsum tau nce kom siv cov pa ntau dhau, uas yuav pab txhawb kev sib xyaw kom zoo ntawm cov nplaum.
(2) Kho kom haum rau cov kua mem thiab cov kuab tshuaj seem
Feem ntau cov ntim khoom yooj ywm yog cov zaj duab xis luam tawm, cov txheej txheem luam ntawv hauv tsev yog siv cov kua roj hmab gravure luam ntawv. Hauv cov kua roj hmab ua cov khoom ntxiv yuav muaj cov tshuaj diluent thiab cov tshuaj retarder, ob qho tib si yog polyurethane resin system, hauv cov nplaum nrog NCO reaction tuaj yeem noj qee qhov NCO.
Peb txhawj xeeb txog qhov huv thiab cov dej noo ntawm cov tshuaj seem. Lawv yuav nyob ntau dua lossis tsawg dua ntawm daim ntawv luam tawm, thiab cov hydrogen uas tseem tshuav yuav siv qee cov NCO. Yog tias cov tshuaj seem nyias dua thiab cov tshuaj seem qeeb dua, peb tuaj yeem ntxiv cov khoom A los txhim kho cov txiaj ntsig.
(3) Kho kom haum rau kev hloov pauv txhuas
Muaj ntau cov ntaub ntawv ntim khoom yooj ywm tam sim no tau ua los ntawm txhuas, thiab qhov cuam tshuam ntawm kev ntxhov siab rau ntawm txheej txheej tuaj yeem txo qis los ntawm kev kho qhov sib xyaw ntawm cov khoom A / B kom mos lawv, feem ntau ua rau cov khoom B nce ntxiv thiab txo qhov hloov pauv ntawm lub xeev ntawm txhuas los ntawm cov nplaum cuam tshuam.
Lub sijhawm tshaj tawm: Plaub Hlis-22-2021