Detachable adhesive strip

US11084958B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Thorsten Krawinkel · Hamburg, DE
• Lesmona Scherf · Hamburg, DE
• Anika PETERSEN · Heidmühlen, DE
• Thilo Dollase · Hamburg, DE

Key dates

• Filing date: Dec 5, 2013
• Grant date: Aug 10, 2021
• Expiry date: Dec 5, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2878
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an adhesive film strip comprising at least two, particularly three, layers, which adhesive film strip can be detached without residues and nondestructively by expansive stretching substantially in the adhesion plane, with a carrier on which a first external adhesive compound layer is present on at least one side, wherein • the adhesive compound layer consists of adhesive compound formed on the basis of vinyl aromatic block copolymers and adhesive resins, wherein at least 75% of the resin (relative to the overall resin content) is selected with a DACP (diacetone alcohol cloud point) of greater than −20° C., preferably greater than 0° C., and • the carrier has at least one layer consisting of a polyurethane with an elongation at break of at least 100% and a restoring power of more than 50%. A nonpolar hydrocarbon resin or a polyterpene resin is particularly used as the tackifier for the adhesive compound(s).