| abstract |
The invention relates to a self-adhesive strip which adheres on both sides and can be especially used to ensure very long-lasting adhesion at high temperatures. Such adhesive strips, especially adhesive strips for assembly, which are used to permanently fix objects to substrates, are preferably designed in a multi-layer manner. The inventive double-sided adhesive strips are characterised in that the viscoelastic carrier layer consists of a thermally homogeneously cross-linked acrylate hot-melt adhesive which is free of photoinitiators. Said adhesive strips are also characterised in that the homogeneously thermally cross-linked acrylate hot-melt adhesive has cross-link points over urethane units. The viscoelastic carrier layer is respectively covered on both sides with adhesive layers, preferably contact adhesive layers, which are connected to the viscoelastic carrier layer by a chemical reaction. According to the process for producing the adhesive strips, the adhesive layers previously applied to a separating material are subjected to a corona pre-treatment, the acrylate hot-melt adhesive to be thermally cross-linked is applied in a sheet-type manner and formed, a thermal cross-linking agent having been added to the acrylate hot-melt adhesive before the application thereof, the layers are laminated together, and the secondary reaction is carried out on the bale preferably without introducing any additional heat to the cross-linking process. Said method ensures an especially good adhesion of various materials, which is an especially positive development for the adhesive properties of the adhesive strip used for assembly. |