Kraft daim ntawv thiab cov ntawv yas hauv cov xuab zeb kev lag luam
Apr 25, 2025
Tso lus
av paj
Daim ntawv yas thiab kraft ntawv hauv cov suab paj nruag
kraft ntawv
Kraft ntawv yog tsim los ntawm cov ntoo sulfate ntoo pulp ntawm coniferous ntoo thiab yog tsim nyob rau ntawm lub cav hlau ntev ntev. Nws tshwm nyob rau hauv daj daj - xim av lossis dawb ceev dawb.
Nws kua muag ntev tshaj 6,000 meters, nrog lub kua muag siab tshaj thiab tawg lub zog, nrog rau kev ua phooj ywg zoo thiab ib puag ncig. Cov tsis tau txiav txim siab version yog siv rau ntim khoom siv, thaum lub sij hawm cov tshuaj dawb (SBS) muaj qhov haum du thiab yog qhov siab {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} txawj luam ntawv. Nws yog dav siv hauv cov zaub mov ntim, cov hnab ntawv, thiab hluav taws xob laminating substrates (xws li FPC / PCB).
Yas
Daim ntawv yas latex yog tsim los ntawm cov xim ntuj zoo nkauj thiab nws cov npoo muaj peev xwm yuav muaj qhov me los txhim kho cov dej noo tsis kam thiab number case absantbency.
Nws yog hloov tau, hnav - tiv taus, kua muag {{tsis tshua muaj kev ruaj khov. Nws yog qhov haum rau noo noo- ntawv pov thawj ntim ntawm cov phau ntawv, cov ntawv xov xwm, khoom noj khoom haus. Nyob rau hauv kev teb cov teb, nws yog siv los ua ib qho txheej txheem hluav taws xob hluav taws xob hluav taws xob thiab cua sov- kev ua pa. Hauv cov teb kho mob, nws ua haujlwm ua cov khoom siv hauv paus rau kev hnav khaub ncaws breatings. Nyob rau hauv lub zoo nkauj teb, nws tau sim xws li ntoo lis thiab tawv ntxhib los mos.
I. Cov Evolution ntawm Kraft Ntawv: Los ntawm ntim khoom rau cov khoom siv hauv paus
1.1 keeb kwm keeb kwm
Keeb kwm ntawm kraft ntawv tuaj yeem raug taug qab rov qab mus rau cov tshuaj pulping thev naus laus zis thev naus laus zis hauv nruab nrab-xyoo pua puv 19.
Xyoo 1857, Hutton tsim cov tshuaj lom neeg lub siab, uas cuam tshuam ntawm cov ntoo hydroxide los ua cov khoom "kraft pulp" nrog lub zog txhim kho thawj zaug.
Xyoo 1883, kev loj hlob ntawm sulfate pulping txheej txheem qhib qhov tseeb kev lag luam tsim cov ntawv kraft. Cov ntawv Kraft thaum ntxov yog siv rau ntsev ntim khoom thiab hloov cov ntaub ntawv tsoos sai thiab noo noo- ntawv pov thawj cov khoom.
1.2 Khoom Siv Khoom Siv
Fiber Txawv Cov Qauv Fiber: Feem ntau ua los ntawm cov khoom muag muag los ntawm cov khoom siv hluav taws xob
Dej tiv: Unblexed kraft daim ntawv muaj cov dej nqus dej uas tsawg dua 8%, ua kom haum rau siv hauv cov chaw noo noo.
Nto Kho: Ib qho tseem ceeb dua tuaj yeem thov kom ua tiav qhov ua kom tiav ntawm ib lossis ob tog, sib tham cov kev cai luam tawm.
1.3 Txheej Txheem Ntau Lawm
Cov txheej txheem ntau lawm ntawm Kraft cov ntawv muaj peb theem: pemping, papermaking, thiab post {{0} {0} {0} {{} kev ua.
Pulping: Cov chips ntoo ua noj, ntxuav thiab ua kom dawb ua rau cov pulp. Tus yuam sij parameter yog tus lej kappa (uas tswj cov xim ntawm cov pulp tsis ua).
Kev sib sau: Pulp yog tsim rau hauv lub vev xaib ntub rau ntawm lub cav hlau ntev ntev thiab tom qab ntawd dewatered rau 50% cov ntsiab lus noo noo hauv tshooj xovxwm.
Post -} ua: Qhov no suav nrog supercalendering (los txhim kho Smoothness), txheej (txhawm rau txhim kho cov roj ua haujlwm), thiab lwm cov txheej txheem.
1.4 Daim Ntawv Thov
Ntim Khoom: Zaub mov {{- daim ntawv qib kraft yog siv rau cov khoom noj qhuav xws li taum kas fes thiab hmoov, ntsib FDA cov qauv.
Muaj Cov Khoom Siv Hauv Paus: Raws li lub hauv paus ntawv rau cov xuab zeb, kraft ntawv nrog qhov hnyav ntawm 120g / ㎡, tom qab tau sib xyaw nrog cov dej yas, yog ua rau cov av dej.
Cov Ntawv Thov Tsim Kho: Cov ntawv ntxuav kraft kraft tuaj yeem ua rau hauv hnab ev khoom thiab hnab nyiaj, thiab tom qab kev kho mob tshwj xeeb, nws tuaj yeem tiv taus ntau dua 20 ntxhua khaub ncaws.
Ii. Daim Ntawv Yas: Kev lag luam evolution ntawm ntuj roj hmab
2.1 kev tsim keeb kwm
Daim ntawv yas tawm los ntawm kev siv cov thev naus laus zis ntawm cov roj hmab ntuj thaum ntxov xyoo pua 20th. Xyoo 1920s, Dunlop tsim cov txheej txheem ua npuas dej looj, pib siv hauv cov txaj txaj muag. Thaum xyoo 1950, Looj kos rau lub tshuab luam ntawv ua cov hom tshiab ntawm cov coated sasttrate, thiab nws cov kev hloov pauv tau thiab cov ntawv luam tawm nyiam.
Xyoo 1920s, Dunlop tsim cov txheej txheem ua npuas dej looj, pib siv hauv cov txaj txaj muag.
Thaum xyoo 1950, Looj kos rau lub tshuab luam ntawv ua cov hom tshiab ntawm cov coated sasttrate, thiab nws cov kev hloov pauv tau thiab cov ntawv luam tawm nyiam.
2.2 Cov Khoom Siv Khoom
Muaj pes tsawg: Muaj 15% {- 30}} Alcium lattomex, nrog cov calcium carbonate muab rau kom muaj zog txhav.
Cov Khoom Siv Lub Cev: Elongation thaum tawg mus txog 500%, thiab nws puas tsis kam yog peb zaug zoo dua li cov ntawv hluavtaws.
Cov Txheej Txheem Ib puag ncig: Biodegradable thiab tsis tsim cov tshuaj lom xws li cov tshuaj lom zem xws li cov dioxins thaum hlawv.
2.3 Cov Txheej Txheem Ntau Lawm
Cov tub ntxhais ntawm cov ntawv yas ntau lawm nyob hauv kev tswj ntawm txheej txheem txheej txheej:
Substrate npaj: Siv 60-80g / ㎡ nkauj xwb daim ntawv nrog siab du thiab seem ruaj khov.
Daim Txheej looj: Thov siv riam riam, nrog ib txheej hnyav ntawm 15-25g / ㎡.
Kom qhuav thiab kho: Qhuav ntawm 120℃nrog cov huab cua kub kom ua kom tiav cross -} kev sib txuas ntawm cov latex txheej.
2.4 chaw thov
Luam ntawv thiab ntim khoom: Siv rau high -}} Lub thawv ntim ntim ntim ntim ntau, tso cai rau cov txheej txheem xws li kub stamping thiab UV luam ntawv.
Kev muaj cov abrasives: Ua haujlwm raws li cov khoom siv hauv paus rau cov ntawv paj nruag xuab zeb. Qhov yooj yooj yim ntawm daim ntawv yas ua rau cov xuab zeb siv rau kev ua raws li nkhaus chaw thaum ua.
Cov Khoom Siv Kho Mob: Tom qab tsis muaj menyuam, nws yog siv rau kev phais cov khaub ncaws hnav, muab cov pa ua pa zoo dua li cov luam yeeb tsoos.
Xa kev nug