Kev txiav txim siab tseem ceeb thaum hloov lub vijtsam luam ntawv number case: Substrate Compatibility, Adhesion Test thiab Xim Matching Guide

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. Tsis zoo Ink Adhesion (Interface Failure)

Qhov no yog hom kev ua tsis tau zoo tshaj plaws.

Feem ntau ua rau muaj xws li:

Tsawg zog substrate (<38 dynes/cm without treatment)
Resin system xaiv tsis raug
Kev kho tsis txaus (UV lossis txheej txheem ziab tsis sib haum)

Qhov tshwm sim:

Ink peeling thaum kuaj kab xev
Txo abrasion tsis kam (<200 cycles in wear test)

2. Xim tsis sib haum (Optical Deviation)

Txawm tias thaum siv tib xim qauv, qhov sib txawv tuaj yeem tshwm sim vim:

Pigment dispersion theem sib txawv
Ink zaj duab xis thickness variation (piv txwv li, 8 μm vs 15 μm qhuav zaj duab xis)
Substrate absorption sib txawv

Hom engineering kam rau ua:

ΔE > 3.0=visually noticeable deviation
Lub hom phiaj muaj: ΔE Tsawg dua lossis sib npaug rau 2.0

3. Deg Defects (Cracking, Peeling, Smudging)

Cov teeb meem no feem ntau tshwm sim los ntawm cov neeg kho tshuab kev ntxhov siab tsis sib haum xeeb ntawm cov kua nplaum zaj duab xis thiab substrate:

Flexible substrate + brittle number case zaj duab xis → tawg
Ceev kom qhuav nto + ntub sab hauv txheej → smudging
Tshaj - txheej tuab tuab → tsis zoo kho lossis ziab tsis sib xws

4. Tus nqi ntau lawm thiab kev poob qis

Ink incompatibility feem ntau ua rau kev ua haujlwm zais cia:

Tshuab ntxuav lub sijhawm (30-90 feeb ib zaug hloov)
Ua kom muaj kuab paug pov tseg thaum kuaj thiab kho
Kev tsis lees paub ntau dua (2-10% hauv kev khiav tsis ruaj khov)
Feem ntau recalibration ntawm viscosity thiab pH

👉 Nyob rau hauv siab -cov kab ntau lawm (Ntau dua lossis sib npaug rau 100 m / min flexo systems), txawm tias me me tsis ruaj khov tuaj yeem ua rau muaj kev cuam tshuam loj dhau sijhawm.

Ink Viscosity

Tus nqi pH

Particle Loj

Lub Sijhawm Qhuav

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

Cheebtsam	Piv txwv	Muaj nuj nqi
Dej (qhov hnyav)	40–60%	Carrier, tswj kom qhuav
Resin (zeeg)	20–40%	Zaj duab xis tsim, adhesion
Pigment	10–20%	Xim lub zog
Cov tshuaj ntxiv	1–5%	Flow, defoaming, leveling

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).

Tsawg dhau (<15s)	Kev hloov ceev ceev, tsawg ceev, dot nce
Too High (>25s)	Kev hloov pauv tsis zoo, phaj qias neeg, xim tsis sib xws

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

3. pH Tus nqi Tswjhwm (Civ 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.

4. Particle Loj (Fineness)

Txheem: 10-20 μm. Siab -res: Tsawg dua lossis sib npaug li 10 μm.
Siv filtration (100-150 mesh) thiab do ua ntej siv kom tsis txhob muaj sedimentation.

5. Lub Sijhawm Qhuav ntawm Ink

Ntawv: 5-15s. Zaj duab xis: 20-60s.
Kev ziab tsis txaus ua rau muaj teeb meem sib tsoo / tacky. Ntxiv 2-5% cawv los yog nce cua kom zoo.

6. Kev sib tham

Kev kho qhov systematic:qis pH nce viscosity; siab dua temp txo nws. Kev kho yuav tsum yog holistic.

☐ Viscosity: Lub hom phiaj ± 2s

☐ pH: 8.5-9.5

☐ Kub: 20-25 degree

☐ Pom: Ntau dua lossis sib npaug rau 100 mesh

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.

Pom zoo Water Based Ink Solution

Xaiv ib tug technically txhim khu kev qha tsum yog ib feem tseem ceeb ntawm cov txheej txheem stability. Cov cwj mem tsis ruaj khov tuaj yeem ua rau viscosity drift thiab cov xim tsis sib xws.