Patent EP-2154217-A2 (EP)
Inventor: KLEINHOFF KLAUS
IPC: C09J7/20
Filed: 2009-07-15
Abstract: The self-adhesive article such as double-sided adhesive tape (1) and label comprises an adhesive layer, which comprises a hardenable polyurethane adhesive mass (3) that hardens under receiving or delivering a material, units for controlling reception of the material from the environment into the adhesive mass or delivery of the material from the adhesive mass into the environment, and a substrate (4) with an edge, at which the control unit is formed. The control units are sealing profiles (2), which adjoin to the hardenable adhesive mass and prevent the hardening of the adhesive mass. The self-adhesive article such as double-sided adhesive tape (1) and label comprises an adhesive layer, which comprises a hardenable polyurethane adhesive mass (3) that hardens under receiving or delivering a material, units for controlling the reception of the material from the environment into the adhesive mass or the delivery of the material from the adhesive mass into the environment, and a substrate (4) having an edge, at which the control unit is formed. The control units are sealing profiles (2), which adjoin to the hardenable adhesive mass, prevent the hardening of the adhesive mass up to predeterminedly starting the hardening process, and are formed at the edge of the article. The hardenable adhesive mass is disposed between the opposite control units. The hardenable adhesive mass has a thickness, which is less than the height of the control unit, before hardening and has a thickness, which corresponds to or exceeds the height of the control unit, after hardening. The substrate is a strip-shaped substrate, at whose longitudinal edges the control unit is formed. The control unit is introduced as sealing profile on a side of the strip-shaped substrate and/or formed in the substrate. The hardenable adhesive mass hardens under increase in volume. The control unit has a material area, which receives the substance, whose reception from the environment is required for hardening the hardenable adhesive mass, so that the contact between the substance and the hardenable adhesive mass is prevented up to predeterminedly starting the hardening process. The control unit has a material area, which receives the substance, whose delivery to the environment is required for hardening the hardenable adhesive mass, so that the concentration of the substance in the hardenable adhesive mass, which is necessary to prevent its hardening, is maintained up to predeterminedly starting the hardening process. The material is applied on the control unit. The control unit is separatable from the self-adhesive article. The sealing profiles at the longitudinal edges of the substrate are formed at both upper sides of the strip-shaped substrate and the hardenable adhesive mass is present between the sealing profiles. A self-adhesive mass is applied on the upper side of the strip-shaped substrate. The label comprises a carrier layer. The sealing profiles at the longitudinal edges of the label are formed at both upper sides of the carrier layer. An independent claim is included for a method for producing a self-adhesive article.