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Tuesday, 19 March 2019
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Raw materials & technologies, Technologies

Resource-saving paper finishing as an alternative to UV coating

Monday, 11 March 2019

Grönenbacher Lackfabrik has developed an environmentally friendly alternative to UV coating in paper finishing.

The newly developed formulations can also be used in the food industry, for example for coating pizza packaging. Source: sovereignpartners / Pixabay.

The newly developed formulations can also be used in the food industry, for example for coating pizza packaging. Source: sovereignpartners / Pixabay.

With its new water-borne and solvent-free product line, the Bavarian manufacturer Grönenbacher Lackfabrik, Gropper + Viandt GmbH, sets a new standard when it comes to water- and fat-repellent coatings that can even be used in the food industry. The innovations achieve values in water repellency and fat barrier properties that can often only be achieved by energy-intensive UV coatings. They can be applied both by rolling and spraying and are therefore a particularly energy-saving and above all low-emission alternative to UV coatings.

Water repellency and fat barrier effect

In the area of water repellency, the new formulations from Bad Grönenbach achieve very good Cobb values. The water-repellent "Water-Repellent-Paper-Finish" according to ISO 535:1991 Cobb-1800 achieves values of 70 g/m2 (at 2 µm layer thickness) in a single coat. In a two-layer application, the water absorption according to Cobb-1800 is reduced to approx. 40 g/m2. In combination with the "Barierre-Base-Coat" as primer, Cobb-1800 values of significantly less than 10 g/m2 are achieved. The grease and oil-repellent water-borne "Grease-Resistant-Paper-Finish" coating achieves KIT values of 5 in a single coat and even increases this to 12 in a double coat. Depending on the oil or grease qualities, resistances of more than 24 hours can be achieved.

Further information can be found on the Grönenbacher Lackfabrik Gropper + Viandt GmbH website.

Image source: Pixabay

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