Tesa Se

Philipp Preuss

Thilo Dollase

Arne Koops

Kai Ellringmann

Marco Kupsky

Matthias Koop

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.

Partable laminate and method for parting long-term bonds

The invention relates to an adhesive film which comprises a layer of an adhesive that comprises one or more polymers and at least one peroxide, characterized in that the adhesive comprises at last 50% by weight of thermoplastic polymers that do not have C&#x2550;C multiple bonds, in that at least one peroxide has the general structural formula R&#x2014;O&#x2014;O&#x2014;R', wherein R and R&#x2032; each represent organyl groups or together represent a cyclic organyl group, and in that the peroxide in solution has a 1-minute half-life temperature of less than 200&#xb0; C. In a preferred embodiment, the thermoplastic polymer is a polyurethane and the peroxide is a dicumyl peroxide.

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Norderstedt, Germany

Philipp Preuss