Name: Waterborne Flexographic Ink Binder WFB-50
Brand: Coatingsink
SKU: waterborne-flexo-binder-wfb50
Availability: InStock

Question 1

What type of polymer is WFB-50 and why is it suitable for paper and board flexo printing?

Accepted Answer

WFB-50 is an acrylic-based aqueous dispersion optimized for flexographic ink formulations. Its Tg of 20–35°C provides a balance between film formation at ambient temperature (no need for coalescent solvents) and the blocking resistance needed for stacked printed sheets. The alkaline pH (8–9) keeps the dispersion stable and compatible with ammonia or amine-stabilized pigment dispersions commonly used in waterborne flexo inks.

Question 2

How does waterborne flexo binder WFB-50 compare to solvent-based nitrocellulose systems for corrugated board printing?

Accepted Answer

WFB-50 eliminates VOC emissions associated with solvent-based nitrocellulose ink systems and is compatible with modern environmental regulations for food-adjacent packaging. It dries by water evaporation and absorption into the board substrate, enabling the high press speeds used on central impression flexo presses for corrugated. Solvent-based NC inks offer faster initial set speed and slightly higher gloss, but are increasingly restricted in markets with VOC limits and food-safety requirements for packaging.

pH	8–9
Film Tg	20–35°C
Solid Content	50±1%
Viscosity (25°C)	200–600 mPa·s
Water Resistance (after cure)	excellent

Waterborne Flexographic Ink Binder WFB-50

Specifications

FAQ

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