Tshawb nrhiav kev txhim kho ntawm Dej-raws li Inks thiab Kev Kawm ntawm Eco-Friendly Water-Based Polyurethane Inks

Cov pa phem tau ntev dhau los yog ib qho kev txhawj xeeb loj, nrog rau cov pa pa phem xws li VOCs yog qhov tseem ceeb ntawm kev koom tes nrog cov xwm txheej ntuj xws li cua daj cua dub. Raws li kev paub txog kev tiv thaiv ib puag ncig loj hlob thiab ntau yam kev cai hauv teb chaws raug coj los siv, kev lag luam luam ntawv, VOC emitter loj, tau ntsib kev hloov pauv yam tsis muaj kev hloov pauv. Yog li ntawd, eco-phooj ywg luam ntawv inks tau dhau los ua qhov tseem ceeb hauv kev tshawb fawb thoob ntiaj teb kev lag luam luam ntawv. Ntawm cov muaj eco-phooj ywg inks, nrog rau cov dej-raws li inks, lub zog-kho inks, thiab zaub roj-raws li inks, dej-raws li inks yog siv dav tshaj plaws. Cov dej ua kua dej muaj qhov qis dua ntawm cov kuab tshuaj organic, txo qis VOC emissions thiab ua raws li kev tiv thaiv ib puag ncig. Txawm li cas los xij, dej-raws li inks kuj muaj qhov tsis zoo xws li qeeb ziab thiab kho lub sij hawm thiab dej tsis zoo thiab alkali tsis kam, txwv lawv daim ntawv thov hauv cov tshuaj inks. Yog li, kev txhim kho cov kev qaug zog no los ntawm kev hloov kho resin tau dhau los ua qhov tseem ceeb. Daim ntawv no qhia txog kev txhim kho thiab kev siv cov dej-raws li inks, kev kawm txog kev hloov kho resin, kev nce qib hauv kev tshawb fawb ntawm cov ntawv luam ntawv uas siv dej-raws li polyurethanes, thiab cov kev cia siab yav tom ntej hauv daim teb no.

• Kev sim

1. Kev loj hlob ntawm Dej-Based Inks

Inks muaj keeb kwm ntev, tshwm sim nrog kev tsim ntawm luam ntawv. Tom qab kev qhia txog Lithol Liab Pigment hauv xyoo 1900, inks tau nthuav dav, ua rau lub teb chaws los nqis peev hauv kev tshawb fawb number case. Dej-raws li inks yog ib qho derivative uas tshwm sim los ntawm kev xav tau ntau dua rau kev ua haujlwm ntawm number case. Kev tshawb fawb txog dej-raws li inks pib txawv teb chaws nyob rau hauv 1960s, feem ntau yog ua kom ceev cov nqi luam ntawv thiab txo kev cia siab rau cov khoom siv roj av. Cov inks no siv cov organic tebchaw xws li benzenes thiab shellac los yog sodium lignosulfonate ua cov ntaub ntawv tseem ceeb kom tau raws li kev xav tau luam ntawv thaum lub sijhawm. Nyob rau xyoo 1970, cov kws tshawb fawb tau tsim cov polymer emulsion resin nrog cov tub ntxhais-plhaub thiab cov qauv network los ntawm polymerizing acrylic monomers nrog styrene, tswj cov inks 'gloss thiab dej tsis kam thaum ua tau raws li ib puag ncig. Txawm li cas los xij, raws li kev paub txog ib puag ncig tau nce ntxiv thiab cov kev cai nruj ib puag ncig tau tsim tawm, qhov feem pua ​​​​ntawm benzene-based organics hauv inks poob qis. Los ntawm xyoo 1980s, Western European lub teb chaws tau qhia txog cov tswv yim thiab thev naus laus zis ntawm "ntsuab number case luam ntawv" thiab "tshiab dej-raws li number case luam ntawv."

Tuam Tshoj tus number case kev lag luam pib nyob rau hauv lub lig Qing Dynasty nrog rau zus tau tej cov txiaj, cia siab heev rau imported inks mus txog rau thaum 1975, thaum Tianjin Ink Factory thiab Gangu Ink Factory tsim thiab tsim thawj domestic dej-raws li gravure number case. Los ntawm xyoo 1990, Tuam Tshoj tau xa tawm ntau dua 100 flexo luam ntawv cov kab ntau lawm, ua kom nrawm nrawm rau kev siv cov dej ua kua dej. Nyob rau hauv 2003, Tuam Tshoj Industrial Technology Research Institute tau ua tiav cov khoom muaj feem xyuam, thiab nyob rau hauv thaum ntxov 2004, Shanghai Meide tuam txhab tsim ib tug tag nrho cov dej-raws li, low-temperature thermosetting number case raws li Japanese thiab German qauv. Txawm hais tias Tuam Tshoj txoj kev tshawb fawb txog dej-raws li inks pom kev loj hlob sai nyob rau hauv thaum ntxov 21st caug xyoo, Western lub teb chaws twb tau ua tiav tseem ceeb: txog 95% ntawm cov khoom flexo thiab 80% ntawm cov khoom gravure nyob rau hauv lub tebchaws United States siv dej-raws li inks, thaum lub UK. thiab Nyiv tau txais cov dej-raws li inks rau zaub mov thiab tshuaj ntim khoom. Piv txwv li, Tuam Tshoj txoj kev loj hlob qeeb qeeb.

Txhawm rau txhawb kev lag luam ntxiv, Tuam Tshoj tau tshaj tawm thawj tus qauv dej-raws li tus cwj pwm hauv lub Tsib Hlis 2007 thiab xyoo 2011 tau tawm tswv yim rau "kev tsim kho tshiab tshiab," txhawm rau hloov cov kuab tshuaj raws li cov kuab tshuaj nrog cov dej-raws li inks. Hauv 2016 "13th Tsib Xyoo Plan" rau kev lag luam luam ntawv, "kev tshawb fawb txog dej-raws li ib puag ncig cov ntaub ntawv" thiab "ntsuab luam ntawv" yog qhov tseem ceeb. Los ntawm 2020, lub teb chaws txhawb kev luam ntawv ntsuab thiab digital tau nthuav dav cov dej-raws li number case ua lag luam.

2. Kev siv cov dej-raws li Inks

Thaum pib ntawm lub xyoo pua 20th, Tebchaws Asmeskas thawj zaug siv dej-raws li inks hauv flexo luam ntawv. Los ntawm xyoo 1970s, cov dej zoo li dej-raws li gravure inks tau dav siv rau ntau yam ntaub ntawv ntim, phau ntawv tuab, thiab duab los qhia. Hauv xyoo 1980s, glossy thiab matte screen luam ntawv dej-raws li inks tau tsim tawm txawv teb chaws, nthuav lawv daim ntawv thov rau ntaub, ntawv, PVC, polystyrene, txhuas ntawv ci, thiab hlau. Tam sim no, vim lawv cov eco-phooj ywg, tsis muaj tshuaj lom, thiab cov yam ntxwv muaj kev nyab xeeb, cov dej-raws li inks feem ntau yog siv hauv cov ntawv ntim zaub mov, xws li ntim luam yeeb thiab lub raj mis dej haus. Raws li kev cai lij choj ib puag ncig txhim kho, daim ntawv thov ntawm cov dej ua kua dej txuas ntxiv ua kom muaj kev sib txawv thiab siv zog. Tuam Tshoj tseem tab tom txhim kho lawv txoj kev siv hauv kev lag luam luam ntawv.

• Cov txiaj ntsig thiab kev sib tham

1. Kev tshawb fawb ntawm Resin Modifications

Ink kev ua tau zoo yog cuam tshuam los ntawm resin sib txawv. Feem ntau, dej-raws li number case resins feem ntau yog polyurethane, hloov acrylic emulsions, los yog polyacrylic resins. Dej-raws li polyurethane (WPU) resins, nrog superior gloss, yog dav siv nyob rau hauv ntim printing. Yog li, kev txhim kho WPU kev ua tau zoo los txhim kho dej-raws li tus cwj mem tus phooj ywg ib puag ncig thiab gloss tau dhau los ua qhov tseem ceeb hauv kev lag luam luam ntawv.

2. Hloov kho dej raws li polyurethanes

Cov dej-raws li polyurethanes, muaj li ntawm tsawg-molecular-yuag polyols, tuaj yeem muab faib ua polyester, polyether, thiab hybrid hom. Raws li cov khoom sib txawv ntawm polyester thiab polyether polymers, lawv lub zog thiab ruaj khov sib txawv. Feem ntau, polyether polyurethanes muaj lub zog qis dua thiab ruaj khov dua li polyester polyurethanes tab sis pom tau zoo dua qhov kub thiab txias thiab tsis tshua muaj hydrolysis. Piv txwv li, ua kom tus number case "sib npaug" los ntawm kev siv polyethylene glycol monomethyl ether txhim kho nws cov yam ntxwv kam rau ua. Txawm li cas los xij, qhov no tsuas yog ib qho piv txwv xwb. Ntau lub koom haum tshawb fawb tau txais ntau txoj hauv kev los txhim kho qhov tshwj xeeb ntawm WPU.

Piv txwv li, nyob rau hauv 2010, epoxy resins nrog siab toughness thiab muaj zog muaj zog raug xaiv los daws tus number case viscosity thiab adhesion teeb meem, yog li pab txhawb tus number case lub zog. Xyoo 2006, ib txoj kev tshawb fawb luam tawm los ntawm Beijing Chemical University tau siv ethylene glycol-based polyurethane los ua ib qho tshwj xeeb resin nrog rau qhov muag muag ntev, txhim kho tus cwj mem yooj yooj yim thiab tsis ncaj qha ntxiv dag zog rau dej raws li tus cwj mem. Qee pawg ua tiav cov txiaj ntsig kev hloov kho los ntawm kev ntxiv cov tshuaj lom neeg: koom nrog silica lossis organosilicon los txhim kho WPU, ua rau kom muaj zog ntawm tus number case tensile. Carboxyl-terminated butadiene nitrile polyurethane yog siv los txhim kho number case dabtsi yog khoov kev ua tau zoo thiab viscosity, hloov mus rau ntau qhov chaw.

Yog li, cov kws tshawb fawb feem ntau xaiv cov polyesters tshwj xeeb raws li tus cwj mem lub zog, siv cov khoom tsim nyog polyacids thiab polyols los ua cov khoom siv hluav taws xob tiv thaiv polyester polyols, qhia cov pawg polar nrog cov adhesion muaj zog, xaiv cov ntaub ntawv tsim nyog los txhim kho polyurethane crystallinity, thiab siv cov coupling agents los txhim kho WPU nplaum. noo noo thiab kub tsis kam.

3. Kev hloov kho dej tsis kam

Txij li tus number case feem ntau yog siv rau sab nrauv ntim thiab nquag sib cuag dej, cov dej tsis zoo tuaj yeem ua rau txo qis zog, gloss, thiab txawm tias number case tev lossis puas tsuaj, cuam tshuam rau kev khaws cia. Kev txhim kho WPU dej tsis kam txhim kho kev ua haujlwm ntawm tus lej los ntawm kev siv polyols nrog cov dej tsis zoo ua cov khoom siv. Piv txwv li, hloov WPU nrog acrylic monomers lossis kho epoxy resin cov ntsiab lus tuaj yeem txhim kho cov dej tsis zoo.

Sib nrug los ntawm kev siv cov dej-resistant polymers los hloov cov qauv polyurethane, cov kws tshawb fawb feem ntau ntxiv cov organic lossis inorganic tshuaj kom ua tiav cov txiaj ntsig xav tau. Piv txwv li, kev koom ua ke nanoscale silica rau hauv cov resin txhim khu cov dej tsis kam thiab lub zog, ib txoj kev siv dav hauv cov kua number case. Txoj kev "emulsion copolymerization method" tsim cov khoom sib xyaw PUA los txhim kho cov dej tsis kam, thaum txoj kev xws li polyethylene glycol monomethyl ether hloov kho thiab acetone synthesis ntawm organosilicon-hloov WPU txhim kho dej tsis kam.

4. Kev Hloov Kho Kub Kub Kub

Feem ntau, WPU qhov kub-kub kuj yog qhov tsis muaj zog, txwv tsis pub dej-raws li tus number case qhov kub tsis kam. Polyether polyurethanes feem ntau muaj qhov kub thiab txias ua haujlwm zoo dua li polyester polyurethanes vim muaj cov ntawv cog lus ob npaug. Ntxiv cov hlua ntev ntev los yog benzene nplhaib esters / ethers li polymerization monomers txhim kho polymer siab-kub tsis kam thiab, yog li ntawd, dej-raws li number case kub kuj. Dhau li ntawm kev siv cov hlua ntev polyether polyurethanes, qee pawg siv cov ntaub ntawv sib xyaw kom muaj kev nyuaj siab thiab txhim kho qhov kub thiab txias. Piv txwv li, ntxiv nano tin oxide antimony rau WPU synthesized los ntawm DMPA, polyether 220, thiab IPDI enables number case khaubncaws sab nraud povtseg kom nqus cua sov, kev txhim kho kub-kub kuj. Ntxiv silica airgel rau polyurethane kuj txo cov thermal conductivity thiab txhim khu cov xim kub ua hauj.

5. Kev hloov kho ruaj khov

WPU kev ruaj ntseg cuam tshuam cuam tshuam rau dej-raws li number case cia kev ua haujlwm. Dhau li dej thiab kub-resistant, molecular hnyav thiab cov qauv kev npaj yog ib qho tseem ceeb heev. Polyester resins feem ntau ruaj khov dua li polyether resins vim muaj ntau hydrogen bonds hauv cov qauv molecular. Ntxiv cov tshuaj ester los tsim cov polyurethanes sib xyaw ua kom muaj kev ruaj ntseg, xws li siv isocyanate thiab silane dispersion los tsim cov khoom siv dual WPU nrog kev txhim kho kev ruaj ntseg thiab kev puas tsuaj. Kev kho cua sov thiab cua txias kuj tseem tuaj yeem tsim ntau cov ntawv cog lus hydrogen, ua kom nruj molecular kev npaj thiab txhim kho WPU stability thiab dej-raws li number case cia kev ua tau zoo.

6. Kev Txhim Kho Adhesion

Thaum optimizing WPU txhim kho cov dej tsis kam, qhov kub thiab txias, thiab kev ruaj ntseg, WPUs tseem qhia tsis zoo adhesion rau polyethylene (PE) cov khoom yas vim qhov hnyav molecular thiab polarity. Feem ntau, cov polarity zoo sib xws thiab molecular hnyav polymers lossis monomers tau ntxiv los txhim kho WPU thiab txhim kho cov dej-raws li tus number case adhesion rau cov ntaub ntawv tsis-polar. Piv txwv li, co-polymerizing WPU nrog polyvinyl chloride-hydroxyethyl acrylate resin txhim kho cov dej adhesion ntawm inks thiab coatings. Ntxiv acrylic polyester cob rau WPU tsim ib tug tshwj xeeb molecular txuas qauv, ho txhawb WPU adhesion. Txawm li cas los xij, cov txheej txheem no tuaj yeem cuam tshuam cov cwj pwm qub zoo li gloss. Yog li ntawd, cov txheej txheem kev lag luam kho cov ntaub ntawv yam tsis muaj kev hloov pauv cov khoom los txhim kho cov kua nplaum adhesion, xws li ua kom cov nplaim hluav taws xob los yog cov nplaim hluav taws kub hnyiab rau lub sij hawm luv luv kom ua kom cov adsorption.

• Xaus

Tam sim no, cov ntawv ntim dej yog siv dav hauv ntim khoom noj, ntim tshuaj, kev cob qhia, phau ntawv, thiab lwm yam txheej txheej lossis luam ntawv. Txawm li cas los xij, lawv qhov kev ua tau zoo ntawm cov kev txwv txwv tsis pub siv dav dav. Raws li kev paub txog ib puag ncig thiab kev nyab xeeb loj hlob nrog cov qauv kev ua neej zoo dua qub, cov dej-raws li eco-phooj ywg inks uas txo VOC emissions tau nce ntxiv hloov cov kuab tshuaj raws li cov kuab tshuaj, nyuaj rau kev lag luam cov kuab tshuaj raws li cov kuab tshuaj.

Nyob rau hauv cov ntsiab lus no, txhim kho tus cwj pwm kev ua tau zoo los ntawm kev hloov cov dej-raws li resins, tshwj xeeb tshaj yog dej-raws li polyurethanes, los ntawm txoj kev tshiab xws li nanotechnology thiab hybridization ntawm cov organic thiab inorganic tebchaw yog qhov tseem ceeb rau yav tom ntej dej-raws li number case. Yog li ntawd, kev tshawb fawb ntxiv txog kev hloov kho resin yog xav tau los txhim kho cov dej-raws li tus cwj mem rau kev siv dav.