Daim ntawv thov ntawm Dej-raws li kev tiv thaiv ib puag ncig Ink Ink Food Packaging Featured Image

Daim ntawv thov ntawm Dej-raws li kev tiv thaiv ib puag ncig Ink hauv ntim khoom noj

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Raws li hom tshiab ntawm ntim thiab luam ntawv cov ntaub ntawv, qhov zoo tshaj plaws ntawm dej-raws li number case yog tias nws tsis muaj volatile organic solvents.Nws siv txo cov nqi ntawm cov organic tebchaw (VOCs), tsis ua rau kev noj qab haus huv ntawm cov tuam txhab luam ntawv thiab cov lag luam luam ntawv, thiab txhim kho ib puag ncig zoo.Yog li ntawd, nws tuaj yeem raug hu ua tus phooj ywg ib puag ncig.Cov yam ntxwv loj tshaj plaws ntawm tus cwj mem dej yog tsis muaj kuab paug rau ib puag ncig, tsis muaj kev cuam tshuam rau tib neeg kev noj qab haus huv, tsis muaj hluav taws xob, thiab kev nyab xeeb zoo.Nws tuaj yeem tsis tsuas yog txo cov toxicity nyob rau saum npoo ntawm cov khoom luam tawm, ua kom yooj yim los ntxuav cov khoom siv luam ntawv, tab sis kuj txo cov hluav taws kub nyhiab los ntawm hluav taws xob zoo li qub thiab cov kuab tshuaj tsw qab.Ntxiv nrog rau kev tiv thaiv ib puag ncig, cov yam ntxwv luam tawm ntawm cov dej raws li tus cwj mem kuj zoo.Cov dej-raws li tus cwj mem muaj kev ua haujlwm ruaj khov, tsis corrode lub phaj, kev ua haujlwm yooj yim, tus nqi qis, zoo adhesion tom qab luam ntawv, muaj zog dej tsis kam thiab ziab sai.Dej raws li inks tsis yog tsuas yog siv hauv flexographic luam ntawv thiab tshuaj ntsuam luam ntawv nrog kev txhim kho zoo.

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Txoj Kev Loj Hlob Thiab Kev Sib Tw Ntawm Dej Txhaum Cai

Tus cwj mem dej yog hu ua dej-raws li tus cwj mem luv luv.Lub flexographic water-based number case kuj hu ua kua number case.Nws yog tsuas yog ua los ntawm cov dej-soluble resin, organic pigment, hnyav thiab lwm yam additives los ntawm compound sib tsoo.Aqueous resin yog ib hom tshiab ntawm cov kab ke uas siv dej es tsis txhob cov kuab tshuaj organic raws li qhov nruab nrab dispersion.Nws yog fused nrog dej los tsim ib qho kev daws teeb meem.Tom qab cov dej volatilizes, cov khoom siv zaj duab xis yog tsim.Cov dej-raws li resin tsis yog dej-raws li resin nws tus kheej tab sis yog cov khoom siv zaj duab xis tau tom qab dej volatilization.Waterborne polyurethane, raws li tus neeg sawv cev, tuaj yeem siv dav hauv cov txheej txheem, cov nplaum, cov ntaub nplaum thiab cov khoom tiav, cov khoom siv tawv tawv, cov ntawv kho cov neeg ua haujlwm thiab cov tshuaj fiber ntau.Dej raws li tus cwj mem tshwj xeeb yog tsim rau cov khoom noj, dej haus, tshuaj, luam yeeb, cawv, cov khoom ua si menyuam yaus thiab lwm yam ntim thiab luam ntawv cov khoom uas yuav tsum tau ua kom huv si nruj, hloov cov kuab tshuaj raws li cov khoom hauv ntau yam.Raws li ib qho ntawm tsib lub ntsiab lus ntawm kev luam ntawv, dej-raws li number case plays lub luag haujlwm tseem ceeb hauv cov txheej txheem luam ntawv thiab luam ntawv zoo.Qhov tsim nyog faib tus cwj mem yog qhov txuas tseem ceeb los xyuas kom meej cov khoom luam tawm zoo.Dej raws li tus cwj mem tau tuav ib feem loj hauv flexographic luam ntawv vim nws qhov zoo ntawm kev tiv thaiv ib puag ncig thiab kev lag luam.
Kev loj hlob muaj zog ntawm kev lag luam ntim ntawv ntsuab yuav inevitably ua rau muaj kev sib tw hauv kev lag luam offset printing number case.Tam sim no tus number case manufacturers tau xa ib lub teeb liab hais tias tus nqi ntawm tus number case raw cov ntaub ntawv tau nce sharply, uas yuav ntxiv cov nqi ntawm ntau lawm thiab ua kom yooj yim.Qhov no feem ntau yog vim lub ntiaj teb tsis txaus ntawm cov tshuaj tua kab mob, uas yog cov ntaub ntawv tseem ceeb hauv kev tsim cov number case.Txog rau tam sim no, tus nqi nce ntawm cov roj av thiab cov khoom siv petrochemical derivatives yog qhov laj thawj tseem ceeb rau kev nce nqi ntawm tus number case.Txawm li cas los xij, txawm tias tus nqi roj poob qis, vim tias kev lag luam tus number case raug cuam tshuam los ntawm kev tsis txaus ntawm cov khoom siv tshuaj, tshwj xeeb tshaj yog cov khoom siv raw xws li nitrocellulose, acrylic acid, acetic acid thiab titanium dioxide, tus number case yuav tseem tsuas nce.Tam sim no, cov teb chaws thiab cov cheeb tsam tsim kho tab tom sim tsim thiab siv tus cwj mem los maj mam hloov cov kuab tshuaj raws li cov kuab tshuaj.Ntim luam ntawv nrog dej-raws li number case luam ntawv raws li lub ntsiab kev loj hlob khoom tau tsim ib tug qauv nyob rau hauv lub ntiaj teb no.

Cov yam ntxwv ntawm cov dej-raws li tus cwj mem: Qhov sib txawv ntawm tus neeg sawv cev thiab roj-raws li tus cwj mem

Qhov zoo ntawm polyurethane rau tus number case tsuas yog siv aliphatic polyester thiab aliphatic isocyanate ua cov khoom siv hluavtaws tseem ceeb hauv kev npaj.Piv nrog cov tshuaj tsw qab polyurethane, cov qub muaj qhov zoo tshaj plaws kho qhov muag ruaj khov thiab cov yeeb yaj kiab tom qab tsim cov yeeb yaj kiab tau zoo dua yellowing kuj.Muaj pawg polar xws li carbamate, urethane, ester daim ntawv cog lus thiab ether daim ntawv cog lus nyob rau hauv polyurethane molecular saw segment rau number case, uas tsim hydrogen bonds nrog cov polar pawg nyob rau saum npoo ntawm ntau yam polar substrates xws li tsiaj thiab PA, yog li tsim ib qho kev sib koom tes nrog. qee qhov kev sib txuas muaj zog.Tom qab hloov kho polyurethane resin yog ua los ntawm tus number case, nws tuaj yeem luam tawm ntawm lub ntsej muag ntawm lub ntsej muag ntawm lub ntsej muag nrog zoo adhesion ceev.Polyurethane resin rau number case feem ntau yog npaj los ntawm polyester los yog polyether polyol, ester nplhaib diisocyanate thiab diamine chain extender.Vim qhov kev taw qhia ntawm urea daim ntawv cog lus nyob rau hauv polyurethane resin, polyurethane urea resin (PUU) yog tsim, uas muaj zoo wetting thiab dispersing zog rau cov xim.
Polyurethane resin rau tus cwj mem muaj kev sib raug zoo nrog aldehyde ketone resin, chloroacetic resin, thiab lwm yam. nws tuaj yeem muab ntxiv rau hauv cov txheej txheem formula raws li qhov xwm txheej tiag tiag los txhim kho kev ua tiav ntawm tus number case.Lub polyurethane resin rau number case yog npaj los ntawm kev qhia urea pawg rau hauv cov tsoos polyurethane molecular ntu, uas zoo heev txhim kho lub zog cohesion thiab zaj duab xis tsim cov khoom ntawm cov resin nws tus kheej.Tsoos polyurethane resin muaj ntau yam miscibility nrog cov kuab tshuaj organic.Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm kev npaj tus cwj mem, txhawm rau kho cov kua dej thiab viscosity ntawm tus number case, nws yog ib qho tsim nyog yuav tsum tau ntxiv cawv organic solvents, uas yuav txo tau qhov ruaj khov ntawm cov resin system thiab ua rau turbidity, flocculent nag lossis daus thiab lwm yam tshwm sim rau ib txwm muaj. polyurethane cob.Nyob rau hauv lub molecular saw ntu ntawm polyurethane resin rau luam ntawv number case, vim muaj urea pawg, polyurethane resin thiab cawv tuaj yeem yaj.Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias cov kuab tshuaj cawv tseem yog pseudo hnyav.Hauv lub xeev microscopic, cov kuab tshuaj cawv tsuas yog encapsulates polyurethane resin molecule, es tsis txhob nkag mus rau lub molecular polarity mus rau hauv lub molecule zoo li cov kuab tshuaj tiag tiag, thiaj li hais tias tus number case npaj nrog polyurethane resin muaj fluidity zoo.
Qhov sib txawv tseem ceeb ntawm tus cwj mem dej thiab roj raws li tus cwj mem yog cov kuab tshuaj.Cov kua dej ua kua dej siv dej (45% - 50%) ua cov kuab tshuaj, nrog cov ntsiab lus VOC tsawg heev thiab muaj kuab paug ib puag ncig;Cov roj pleev xim siv cov kuab tshuaj organic (toluene, xylene, muaj cawv, thiab lwm yam) ua cov kuab tshuaj.Cov dej-raws li tus cwj mem siv dej thiab dej-soluble hnyav raws li cov khoom tseem ceeb ntawm cov xim yaj;Kuj tseem muaj cov xim xim xim thiab xim xim hauv cov xim dej, thiab pH feem ntau nruab nrab;Roj kuj muaj cov xim xim xim thiab xim xim, thiab pH feem ntau yog acidic.Dej raws li tus number case thiab roj-raws li tus cwj mem tsis tuaj yeem sib xyaw rau hauv tib lub taub hau luam ntawv.
Hauv dej-raws li tus number case, dej-raws li resin yog ib qho tseem ceeb ntawm cov dej-raws li tus number case.Cov ntaub ntawv sib txuas ncaj qha cuam tshuam rau kev ua haujlwm adhesion, ziab nrawm, tiv thaiv fouling kev ua tau zoo thiab kub tsis kam ntawm tus number case, thiab tseem cuam tshuam rau gloss thiab number case hloov kev ua haujlwm.Yog li ntawd, kev xaiv cov dej-raws li cov resin tsim nyog yog tus yuam sij rau kev npaj cov dej-raws li number case.Nws yuav tsum muaj kev sib raug zoo nrog cov xim, siab adhesion ceev tom qab luam ntawv thiab tsim zaj duab xis, hnav tsis kam, khawb tsis kam, zoo kub tsis kam, yooj yim crosslinking thiab zaj duab xis tsim.Feem ntau siv cov khoom siv dej muaj xws li dej los ntawm polyurethane resin, acrylic resin, polyvinyl cawv thiab epoxy resin.
Cov dej uas muaj polyurethane resin dispersed hauv dej los ntawm kev qhia cov pab pawg hydrophilic rau hauv polyurethane molecular saw.Waterborne polyurethane resin muaj qhov zoo ntawm kev siv yooj yim, kev ua haujlwm ruaj khov, muaj zog adhesion, siab gloss thiab zoo kub tsis kam.Nws tuaj yeem tsim nyog rau ntau txoj kev luam ntawv, tshwj xeeb tshaj yog rau kev tshuaj ntsuam luam ntawv, cov thawv ntim yas thiab cov yeeb yaj kiab sib xyaw.