Germany-based Wacker Group has developed a new binder for coated paperboard and packaging applications.
Developed specifically for the coating of paperboard surfaces, VINNAPAS EF 104 is vinyl acetate-ethylene-copolymer (VAE) dispersion that is easy to process and provide good print quality on coated paperboard.
The dispersion, which is in line with current food contact regulatory requirements, is suitable for coatings on paperboard packaging of breakfast cereals, frozen food, perfume or pharmaceutical products.
Commenting on the development, Wacker Polymers marketing manager Rob Cuscino said: "Our novel binder VINNAPAS EF 104 shows excellent product properties and thus complements Wacker's broad portfolio for paper and packaging applications.
"Until now, oil-based binders were predominantly used for coating high-quality paperboard, but our new VINNAPAS EF 104 now offers a VAE-based alternative."
VINNAPAS EF 104 claims to provide good calendered sheet gloss, brightness and high-opacity to facilitate a clear, sharp print image on the surface of the paperboard and packaging.
It will also offer dry and wet pick-coating strength, which are critical for good print quality and converting coated paper and paperboard.
The binder shows similar rheology behaviour to alternative binders such as styrene acrylics and styrene butadiene latexes, and can be readily formulated into a coating colour and applied using conventional paper coating methods.
Wacker is introducing VINNAPAS EF 104 at this year's PaperCon.
Image: The newly developed VINNAPAS EF 104 is an ideal binder for coatings used for offset, roto and flexo printing of coated paperboard packaging. Photo: courtesy of Wacker.