Wacker is showcasing four silicone polymers for industrial label applications for the paper and film coating industry at Labelexpo Europe 2015 in Brussels, Belgium, from September 29 to October 2.
Belonging to the new Dehesive SFX product family, the products are solvent-free and cure by a platinum-catalyzed addition reaction.
Due to their high reactivity, the silicone polymers require very little catalyst to cure fully.
Compared to conventional coating systems, platinum savings of up to 60% are possible with the Dehesive SFX system for release-paper and label manufacturers.
In addition, the properties of the new silicone polymers can be optimized specifically for fast labeling processes.
The polymers’ high reactivity stems from their molecules’ star-like branched structure, in which every silicone chain branches even further.
At the end of every branch, there is a vinyl group, which makes addition curing possible.
Due to this three-dimensional molecular architecture, the polymers are able to crosslink significantly better than conventional linear silicone polymers.
Coating systems based on the product range are ideal for use in high-speed coating equipment, yielding a fully cured silicon layer even at low catalyst dosage.
The resulting release properties are ideal for machine delamination at high throughputs.
Due to the flat release force profile, very little force is required for delamination even when labels are removed very quickly – such as during mass production of consumer goods.
The release properties do not change, even after protracted storage of the laminate.
