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AssigneeTesa SE
InventorsKlaus Keite-Telgenbuescher, Monika Junghans, Bernd Dietz, Udo Dominikat, Frank Domann, Ute Ellringmann, Veronika Ramm
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The invention provides a planar element which is intrinsically heatable and which is particularly suitable for attachment to multi-dimensionally curved surfaces. For this purpose the planar element features particularly high deformability, achieved in accordance with the invention through a planar element having a layer sequence comprising a heating layer and a contacting layer, each of these two layers being composed of a polymeric material based on elastomers and/or on plastic polymers which have a particular elongation at break and at the same time a particular tensile elasticity modulus. Furthermore, the invention provides an adhesively bonded assembly comprising a bonding substrate and a planar element of the aforesaid kind, a method of producing a planar element of the aforesaid kind, and the use of such a planar element for heating an adhesively bonded assembly.
Self-adhesive planar element comprising a heating layer and a contacting layer, the heating layer being in contact with one of two side faces of the contacting layer and being in electrically conducting communication therewith, and being composed of an intrinsically heatable first polymeric material formed as a conductor which heats up when an electric current is passed through, wherein the contacting layer is comprised of an electrically conducting second polymeric material, the first polymeric material and the second polymeric material each being a polymeric material based on elastomers and/or on plastic polymers, and each having, at a stretching velocity of 300 mm/min and a temperature of 23° C., an elongation at break of more than 20%, and further possessing a tensile elasticity modulus of less than 1000 MPa.
Dependencies are inferred from the claim text.