Partable laminate and method for parting long-term bonds

US12351748B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Philipp Preuss · Norderstedt, DE
• Arne Koops · Mölln, DE

Key dates

• Filing date: Dec 21, 2022
• Grant date: Jul 8, 2025
• Expiry date: Jul 18, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2433/006
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Laminates designed and equipped to be separated after long-term bonding are provided. The laminates comprise a first pressure sensitive adhesive layer, a separation layer, and a second pressure sensitive adhesive layer. The separation layer comprises a laser-sensitive pigment which at the same time is coloring, and so preferably a black coloration is produced, and consists of a cured coating material, preferably an electron beam-cured or UV-cured coating material, which is at least partly removable by laser irradiation, wherein the first pressure sensitive adhesive layer and/or the second pressure sensitive adhesive layer are laser beam-translucent.