Wacker unveils dispersion for difficult-to-bond surfaces

Wacker has developed a new dispersion suited to bonding various surfaces in the paper and packaging industry. Vinyl acetate-ethylene copolymers (VAE)-based Vinnapas EP 8010 permanently bonds challenging paper and cardboard surfaces, such as coated or painted paper, and polymeric film.

The new product is said to be characterized by outstanding heat resistance, very high setting speed and ease of machine processing. Moreover, it is manufactured without the use of alkylphenol ethoxylates (APEO), and its VAE basis makes supplementary plasticizers unnecessary. Vinnapas EP 8010 is therefore suited to formulating high-performance adhesives for demanding paper and packaging applications in which difficult-to-bond substrates have to be permanently joined. Wacker will unveil the new product at the World Adhesive & Sealant Conference (WAC) 2012, taking place from September 18 to 21 in Paris, France.

Vinnapas EP 8010 was developed specifically for formulating adhesives for difficult surfaces, such as printed and coated papers or polymeric film made of polyvinyl chloride (PVC), polyester or polystyrene. These are particularly challenging to bond, because their surfaces are difficult to wet with the adhesive, making it hard to obtain a stable join.

Vinnapas EP 8010 is said to ensure excellent adhesion to a wide range of difficult surfaces and to lend itself well to machine application. Vinnapas EP 8010 re-emulsifies fast, thus facilitating cleaning of the application equipment. The polyvinyl-alcohol-stabilized dispersion also has a broad formulation scope.

Vinnapas EP 8010 also claims environmental and user-friendly properties. For example, it enables the formulation of adhesives without plasticizing additives, thereby keeping the migration potential in the adhesive extremely low. Another advantage is that the dispersion is manufactured without the use of APEO.

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