Flexible heated area element

摘要

The planar element comprises a first self-adhesive side face, a second self-adhesive side face, a layer sequence comprising a heating layer, a contacting layer and an adhesive layer. The heating layer is contacted and is electrically conductively connected with the first side face of the contacting layer. The adhesive layer is contacted with the second side face of the contacting layer, where the heating layer consists of an intrinsically heatable first self-adhesive mass (10) that is formed as a self-heatable posistor when an electric current is passed through. The planar element comprises a first self-adhesive side face, a second self-adhesive side face, a layer sequence comprising a heating layer, a contacting layer and an adhesive layer. The heating layer is contacted and is electric conductively connected with the first side face of the contacting layer. The adhesive layer is contacted with the second side face of the contacting layer, where the heating layer consists of an intrinsically heatable first self-adhesive mass (10) that is formed as a self-heatable posistor when an electric current is passed through. The adhesive layer consists of a second self-adhesive (30) and the contacting layer is a two-dimensionally extending perforated contacting element (20). The perforated contacting element consists of notches whose principal extent runs in a spatial direction. The perforated contacting element has a branched comb structure or finger structure. All of the sub-regions of the perforated contacting element are in electrically conducting connection with one another through the perforated contacting element. The perforated contacting element has two sub-regions which are not in electrically conducting connection with one another via the perforated contacting element. The first self-adhesive comprises electrically conductive filler, which is conductive carbon black. The first self-adhesive mass consists of partially crystalline polymers. The first self-adhesive and/or the second self-adhesive is/are a pressure-sensitive adhesive based on acrylates and/or methacrylates, natural rubbers, synthetic rubbers and/or silicones. The first self-adhesive and/or the second self-adhesive is a hotmelt adhesive based on polyolefins and copolymers of polyolefins and their acid-modified derivatives, ionomers, polyamides and their copolymers and block copolymers such as styrene block copolymers. The composition of the first self-adhesive is identical to or different from the composition of the second self-adhesive. The planar element has a third self-adhesive on the side face of the heating layer that faces away from the perforated contacting element. The heating layer has a thickness of 20-200 mu m. The planar element comprises a flexible permanent backing. The planar element is backing-free form. Independent claims are included for (1) an adhesively bonded assembly; and (2) a method of producing a planar element.