Kev ua haujlwm ntawm cov ntawv tshwj xeeb thaum lub sijhawm tsim khoom yog nyob ntawm cov txheej txheem tshwj xeeb thiab cov tshuaj ntxiv. Piv txwv li, nyob rau hauv cov roj-cov tshuaj tiv thaiv, fluorine- muaj cov neeg ua hauj lwm- xws li perfluoroalkyl- hloov amines, quaternary ammonium ntsev, thiab acrylates - tau muab tso rau hauv daim ntawv los ntawm kev ntxiv rau hauv cov ntaub so ntswg los yog viav vias daim ntawv. Thaum lub sij hawm tom qab cua sov thiab ziab, cov additives no tsim ib txheej monomolecular ntawm daim ntawv fibers nrog perfluoroalkyl pawg taw qhia sab nraud, yog li tiv thaiv cov roj los ntawm kev nkag mus rau daim ntawv.
Hais txog dej-kev kho cov tshuaj tiv thaiv, paraffin emulsion yog ib qho thaum ntxov-theem thiab tus nqi qis- dej-repellent tus neeg sawv cev, feem ntau siv rau daim ntawv ntawm qhov chaw impregnation. Silicones, txawm li cas los xij, sawv cev rau cov chav dej uas siv dav tshaj plaws - cov tshuaj tua kab mob; lawv cov dej emulsion formulations- txhim kho los ntawm kev sib ntxiv ntawm emulsifiers thiab nanoscale silica-induce ib "lotus nplooj nyhuv" rau ntawm daim ntawv nto, cia cov dej ntws los yob tawm ntawm daim ntawv yooj yim.
Nplaim taws-kev kho retardant yog lwm qhov tseem ceeb ntawm kev tsim cov ntawv tshwj xeeb. Cov nplaim hluav taws kub hnyiab tuaj yeem raug qhia ua dej- cov hmoov tsis muaj dej tsis txaus ntxiv ncaj qha rau hauv cov ntaub so ntswg thaum ua ntawv, lossis ua dej- cov neeg ua haujlwm soluble tau muab tso rau hauv daim ntawv los ntawm cov txheej txheem impregnation. Thaum daim ntawv tau qhuav thiab tiav lawm, cov nplaim hluav taws no ua rau cov khoom siv hluav taws kub -cov khoom siv hluav taws xob.
Raws li kev kho cua sov- tiv taus, daim ntawv kev ua tau zoo nyob rau hauv siab - qhov kub thiab txias ib puag ncig yog txhim kho los ntawm kev siv cov tshuaj hloov pauv ntuj polymers - xws li cov khoom sib xyaw ntawm glucomannan thiab nitrogen - muaj cov khoom sib txuas- nrog rau cov khoom siv hluav taws xob polymer, suav nrog silicone resins thiab polyolefins. Ntawm cov no, silicone resins qhia tau tshwj xeeb kev ua tau zoo; lub zog siab zog ntawm lawv Si-O linkages ua rau cov resin ruaj khov thiab resistant rau degradation, yog li imparting zoo heev kub kuj rau cov khoom.
Functional Realization of Specialty Paper
Roj-Tshuaj tiv thaiv
Thaum lub sijhawm tsim khoom, kev ua haujlwm ntawm cov ntawv tshwj xeeb tso siab rau cov txheej txheem tshwj xeeb thiab cov tshuaj ntxiv. Piv txwv li, nyob rau hauv cov roj-cov tshuaj tiv thaiv, fluorine- muaj cov neeg ua hauj lwm- xws li perfluoroalkyl- hloov amines, quaternary ammonium ntsev, thiab acrylates - tau muab tso rau hauv daim ntawv los ntawm kev ntxiv rau hauv cov ntaub so ntswg los yog viav vias daim ntawv. Thaum lub sij hawm tom qab cua sov thiab ziab, cov additives no tsim ib txheej monomolecular ntawm daim ntawv fibers nrog perfluoroalkyl pawg taw qhia sab nraud, yog li tiv thaiv cov roj los ntawm kev nkag mus rau daim ntawv.
Kev kho dej tsis zoo
Ib yam li ntawd, kev kho dej tsis muaj dej muaj ntau yam txheej txheem thiab cov tshuaj siv tshuaj. Paraffin emulsion yog ib qho thaum ntxov -theem, qis- tus nqi waterproofing tus neeg sawv cev uas yog siv rau daim ntawv ntawm nto impregnation. Silicones, ntawm qhov tod tes, yog cov khoom siv dej ntau tshaj plaws; lawv cov khoom aqueous emulsion-formulated nrog emulsifiers thiab nanoscale silica- tsim "lotus nplooj nyhuv" rau ntawm daim ntawv, tso cai rau cov tee dej los yob tawm yooj yim.
Nplaim retardant kho
Kev kho cov nplaim hluav taws kub yog ib kauj ruam tseem ceeb hauv kev tsim cov ntawv tshwj xeeb. Cov nplaim hluav taws tuaj yeem raug qhia ua dej - cov hmoov tsis zoo ntxiv rau hauv cov ntaub so ntswg thaum lub sijhawm ua ntawv, lossis ua dej - cov neeg ua haujlwm soluble siv rau daim ntawv ntawm txheej txheem impregnation. Thaum daim ntawv tau qhuav lawm, cov nplaim hluav taws no tso cai rau cov khoom siv nrog cov nplaim taws-cov khoom siv hluav taws xob.
Kev kho cua sov
Txhawm rau txhim kho daim ntawv kev ua tau zoo nyob rau hauv siab - qhov kub thiab txias ib puag ncig, ntuj thiab hluavtaws polymer- cov tshuaj siv los txhawb nws cov cua sov. Qhov no suav nrog cov tshuaj hloov kho ntuj tsim cov polymers-xws li kev sib xyaw ntawm glucomannan thiab nitrogen-muaj cov khoom sib txuas- nrog rau cov khoom siv hluavtaws polymer, xws li silicone resins thiab polyolefins. Ntawm cov no, silicone resins sawv tawm rau lawv qhov tshwj xeeb thaum tshav kub kub tsis kam thiab tsis yog -stick zog, ntaus nqi los ntawm lawv cov Si-O bonds.
Daim ntawv lub tshav kub tsis kam thiab tsis yog -Nco / Tso Cov Khoom
Thaum tshav kub kub Resistance Agents
Silicone resins ua tau zoo raws li cov cua sov-cov tshuaj tiv thaiv rau cov ntawv fibers. Lub zog siab ntawm lawv cov Si-O linkages ua rau cov resin ruaj khov thiab resistant rau degradation, yog li imparting zoo heev tshav kub tsis kam rau cov khoom. Tsis tas li ntawd, silicone resins muaj cov khoom zoo heev uas tsis yog - nplaum thiab tso tawm cov khoom- tus yam ntxwv ntawm qhov tseem ceeb hauv daim ntawv thov.
Tsis yog -Stick/Release Agents
Tsis yog- lo thiab tso tawm kev kho mob yog ib qho tseem ceeb ntawm kev tsim cov ntawv. Cov kev kho mob no feem ntau yog siv los ua tus kheej- cov ntawv nplaum nplaum, siab- cov ntaub nplaum nplaum, cov ntaub ntawv tso tawm sib xyaw rau cov khoom siv kho kom zoo nkauj, tso cov ntaub ntawv rau cov tawv hluavtaws, thiab tso cov ntaub ntawv rau cov khoom siv kho mob, thiab lwm yam. Los ntawm cov kev kho mob no, daim ntawv tau txais qhov tsim nyog uas tsis yog - lo thiab tso tawm muaj peev xwm ua tau raws li qhov xav tau ntawm ntau yam kev siv. Tshwj xeeb tshaj yog, silicone-raws li cov neeg ua haujlwm tso tawm tau dav siv rau cov kev kho uas tsis yog- nplaum vim lawv cov tshuaj lom neeg ruaj khov.
Impregnation thiab txheej txheej txheej
Yuav tsum muaj rau Base Paper
Hauv cov txheej txheem impregnation thiab txheej txheej, cov ntawv hauv paus yuav tsum muaj lub zog ntub dej txaus los tiv thaiv kev tawg lossis tawg thaum lub sijhawm impregnation; yog li ntawd, ntev - fiber ntau ntoo pulp yog feem ntau xaiv. Lub hauv paus ntawv yuav tsum muaj qhov zoo heev absorbency los xyuas kom meej uptake ntawm impregnating tus neeg sawv cev; Tsis tas li ntawd, nws yog sab laug tsis loj, thiab cov qib ntawm pulping, nias, thiab calendering yog khaws cia kuj qis.
Hom thiab daim ntawv thov ntawm Impregnating Agents
Impregnating agents tuaj nyob rau hauv ntau yam, nrog rau cov resins, latexes, roj, thiab paraffin waxes. Cov neeg sawv cev sib txawv qhia cov khoom tshwj xeeb, ua rau lawv haum rau ntau daim ntawv thov. Piv txwv li, resin-raws li impregnating agents-xws li phenolic resins thiab melamine-formaldehyde resins-endow daim ntawv nrog cov yam ntxwv xws li dej tsis kam, roj kuj, abrasion tsis kam, thiab hluav taws xob rwb thaiv tsev, ua rau lawv zoo tagnrho rau cov ntaub ntawv zoo nkauj thiab laminated composite ntawv. Latex-raws li impregnating agents-xws li styrene-butadiene latex thiab neoprene latex- txhim kho lub zog sab hauv thiab kev puas tsuaj ntawm daim ntawv, nrhiav daim ntawv thov hauv cov ntawv tshwj xeeb kev ruaj ntseg thiab cov ntaub ntawv ntoo veneer. Roj- thiab paraffin{13}}raws li impregnating agents, conversely, muaj zoo heev dej kuj, noo noo tsis kam, thiab pob tshab, ua rau lawv haum rau roj- pov thawj, dej{15}}resistant, thiab noo noo{16}} cov ntaub ntawv pov thawj.
Cov khoom siv txheej txheem
Nyob rau hauv cov txheej txheem impregnation thiab txheej txheej, cov khoom siv tseem ceeb suav nrog lub tank impregnation, lub tog raj kheej kom qhuav, thiab nyem cov chais. Ob lub impregnation rollers thiab lub tank yog tsim los ntawm cov hlau tsis muaj steel kom ntseeg tau xeb thiab kav ntev. Kev sib dhos ntawm cov menyuam rub tawm muaj cov menyuam roj hmab thiab cov chrome-plated roller; lub siab nruab nrab ntawm lawv yog adjustable, thiab cov roj hmab cov menyuam yuav tsum tau tso tawm kev kho mob los tiv thaiv cov latex los ntawm adhering rau nws nto. Cov cuab yeej siv dav siv hauv cov txheej txheem impregnation-xws li ntiav- lub tank impregnation tank thiab lub tog raj kheej kom qhuav- yuav tsum tau tsim nrog cov kav ntev thiab tsis yog- cov khoom hauv siab kom ntseeg tau tias lub neej ua haujlwm ntev.