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US 8,012,581 B2Granted
Bilayer pressure-sensitive adhesives
AssigneeTesa SE
InventorsMarc Husemann, Stephan Zollner
Life of this patent
Estimating the term…
Abstract
The invention relates to a bilayer pressure-sensitive adhesive. Provision is made for the bilayer pressure-sensitive adhesive to comprise an apolar layer and a polar layer, the apolar layer and the polar layer each comprising a polyacrylate pressure-sensitive adhesive having a static glass transition temperature of not more than +15° C., and the surface energy of the apolar layer differing from the surface energy of the polar layer by at least 5 mN/m.
Claims10
Bilayer pressure-sensitive adhesive comprising an apolar layer applied directly to a polar layer,
- the apolar layer and the polar layer each comprising a polyacrylate pressure-sensitive adhesive having a static glass transition temperature of not more than +15° C., and
- the surface energy of the apolar layer differing from the surface energy of the polar layer by at least 5 mN/m.
Dependencies are inferred from the claim text.