Water Based Ink Performance: Engineering & Process Control

Optimizing Viscosity, pH, Particle Size, thiab ziab rau Industrial Printing

Hauv kev siv flexographic thiab tshuaj ntsuam luam ntawv,dej raws li inkkev ua tau zoo tsis yog txiav txim los ntawm kev tsim ib leeg, tab sis los ntawm - lub sijhawm tswj cov txheej txheem. Los ntawm qhov kev xav ntawm engineering, kev ruaj ntseg ntawm kev luam ntawv zoo nyob ntawm plaub qhov tseem ceeb:

1. Ink Viscosity – Flow Behavior thiab Transfer Efficiency

 

Ink viscosity yog qhov taw qhia tseem ceeb ntawm kev khiav hauj lwm thiab kev hloov pauv hauv dej raws li cov kua dej.

Hauv flexographic thiab tshuaj ntsuam luam ntawv, viscosity ncaj qha cuam tshuam:

Ink hloov tus nqi los ntawm anilox lossis mesh
Dot nce tswj thiab ntug sharpness
Xim density sib xws nyob rau lub sijhawm ntev

Hom kev lag luam tswj ntau yam:

Flexographic luam ntawv: 15-25 vib nas this (Zahn Cup #3)
Kev tshuaj ntsuam luam ntawv: 300-2000 mPa·s, nyob ntawm kev suav mesh thiab substrate

Los ntawm cov txheej txheem engineering foundations:

Lub kaw lus viscosity tsawg pab txhim kho kev hloov pauv ceev tab sis ua rau muaj kev pheej hmoo ntawm cov dot nce thiab xim dilution
Lub kaw lus siab viscosity txhim kho xim lub zog tab sis tuaj yeem ua rau tsis zoo, phaj txhaws, lossis tsis sib xws ntawm tus number case

👉 Yog li, viscosity yuav tsum tau khaws cia nyob rau hauv lub qhov rais ua haujlwm nqaim (± 2-3 vib nas this kam rau hauv cov kab ntau lawm) kom ruaj khov cov khoom zoo.

 

2. Tus nqi pH – tshuaj lom neeg ruaj khov thiab ziab kom qhuav

 

Tus nqi pH ntawm dej raws li tus cwj mem luam ntawv txiav txim siab cov tshuaj sib npaug ntawm cov txheej txheem resin thiab ncaj qha cuam tshuam rau tus number case stability thaum lub sijhawm ua haujlwm tas mus li.

Standard kev khiav hauj lwm ntau yam:

PH 8.5-9.5

Hauv qhov chaw tsim khoom tiag tiag:

pH tsis tu ncua cuam tshuam los ntawm ammonia evaporation, kub, thiab dilution dej ntxiv
Txawm tias me me sib txawv tuaj yeem cuam tshuam tus cwj pwm cwj pwm

Cov teebmeem engineering:

pH> 9.5
→ Txo viscosity, qeeb ziab, tsis muaj dej tsis muaj zog
pH <8.5
→ Ua kom cov viscosity ntau dua, ua kom qhuav sai dua, muaj kev pheej hmoo siab dua ntawm nozzle lossis phaj txhaws

Nyob rau hauv siab - tshuab luam ntawv ceev, pH hloov pauv feem ntau yog ib qho ntawm cov ua rau xim tsis ruaj khov thaum lub sijhawm ua haujlwm ntev.

 

3. Particle Size (Fineness) – Dispersion Quality and Print Resolution

 

Particle loj yog hais txog qhov dispersion theem ntawm pigments thiab fillers nyob rau hauv lub number case system.

Hauv cov ntsiab lus engineering, nws txiav txim siab:

Xim uniformity
Nto smoothness
Kev daws teeb meem muaj peev xwm
Kev pheej hmoo ntawm clogging hauv anilox rollers lossis mesh cov ntxaij vab tshaus

Hom kev lag luam uas yuav tsum tau muaj:

Kev ntim khoom dav dav: 10-20 μm
Siab - txhais cov ntawv luam tawm: Tsawg dua lossis sib npaug li 10 μm
Fine screen printing daim ntaub ntawv: Tsawg dua los yog sib npaug rau 8 μm

Txheej txheem cuam tshuam:

Coarse dispersion ua rau cov ntxhib ntxhib ntxhib ntxhib los mos, cov kua dej tsis zoo, thiab teeb meem txhaws
Tshaj -kev sib cais zoo tuaj yeem ua rau muaj kev tsis ruaj khov thiab qhov chaw sib kis

👉 Yog li ntawd, particle loj yuav tsum tau optimized raws li substrate hom, mesh suav, thiab luam cov kev daws teeb meem.

 

4. Lub Sij Hawm Qhuav - Substrate Interacting thiab Ntau Lawm Kev Sib Tw

 

Kev ziab khaub ncaws ntawm cov dej raws li cov tshuab luam ntawv yog tswj hwm los ntawm kev sib xyaw ua ke ntawm:

Kev nqus dej rau hauv substrate
evaporation tus nqi
Environmental kub thiab airflow
Resin zaj duab xis tsim ceev

Tsis zoo li cov kuab tshuaj-raws li cov kuab tshuaj, cov dej raws li tus number case kom qhuav yog qeeb dua thiab rhiab dua rau cov txheej txheem, ua rau nws yog ib qho tseem ceeb tsis zoo nyob rau hauv siab - cov kab ntau lawm.

Tus cwj pwm kom qhuav:

Absorbent substrates (daim ntawv, thawv): 5-15 vib nas this nto qhuav
Tsis yog -absorbent substrates (zaj duab xis, coated cov ntaub ntawv): 20–60 vib nas this los yog ntev dua

Engineering cov kev sib tw:

Tsis txaus ziab → thaiv, smudging, stacking defects
Kev ziab ntau dhau → number case drying ntawm phaj lossis anilox roller (plugging teeb meem)

Txoj kev optimization muaj xws li:

Kho qhov ziab kom qhuav (feem ntau 50-70℃hauv flexo kab)
Ntxiv cov tshuaj tiv thaiv cawv (2-5%)
Sib txuam resin system nrog substrate absorption yam ntxwv
System-Level Insight: Interdependence of Parameters

Lub hauv paus ntsiab lus tseem ceeb hauv engineering hauv dej raws li cov tshuab luam ntawv yog tias cov kev txwv no tsis muaj kev ywj pheej:

Ua kom kub → txo viscosity thiab ua kom qhuav
Kho pH → cuam tshuam rau ob qho tib si viscosity thiab ziab ceev
Particle loj → cuam tshuam rau ob qho tib si ntws tus cwj pwm thiab kom qhuav uniformity

👉 Vim li ntawd, kev luam ntawv ruaj khov yuav tsum muaj ntau yam - kev sib koom ua ke tsis yog ib qho - hloov pauv hloov pauv.

 

 

1. Kev sib xyaw ntawm Dej raws li tus cwj mem

Kev pom zoo:Cov resin siab dua=adhesion zoo dua, qeeb ziab. Cov dej siab dua=hloov pauv sai, xim tsis muaj zog.

2. Ink Viscosity (Core Control Parameter)

Ntsuas siv Zahn khob lossis DIN khob:Flexo (15-25s); Screen (300–2000 mPa·s).

Temp Effect:1℃nce → viscosity poob ~ 2-3%. Khaws lub rooj cob qhia ntawm 20-25 degree.

3. pH Tus nqi Tswjhwm (tseem ceeb rau kev ruaj ntseg)

Standard Range:pH 8.5-9.5

Yog tias pH poob qis dua 8.5: Ink thickens, dries sai heev, thiab clogs daim hlau.
Tswj:Ntxiv amine-raws li additives kom nce pH; saib xyuas txhua 2-3 teev.

6. Kev Sib Tham & 7. Daim Ntawv Teev Npe

 

Dej raws li tus cwj pwm kev ua tau zoo yog los ntawm kev tswj hwm qhov sib txawv, ua kom ruaj khov zoo thiab txo qis sijhawm.