A co-continuous mouldable polymeric composite with PTC effect has a matrix that comprises at least two immiscible polymers (HDPE, POM), and an electrically conductive filler (CB) in the matrix. At least one of said immiscible polymers is high-density polyethylene (HDPE), and at least one other of said immiscible polymers is polyoxymethylene (POM).

A system for heating electro-optic media comprises an electro-optic device comprising: a first substrate having first and second surfaces; a second substrate having third and fourth surfaces; a chamber defined between the opposed third surface of the second substrate and the second surface of the first substrate; electro-optic medium in chamber; a first electrode associated with second surface of first substrate; and a second electrode associated with third surface of second substrate; and a circuit in communication with first and second electrodes, comprising: a first EMF source capable of producing a first voltage; a second EMF source capable of producing a second voltage different from the first voltage; a plurality of switches configured to control the application of first and second voltages to the first and second electrodes; and a controller configured to control the switches, the first EMF source, and the second EMF source.

A PTC heating element has two insulating layers with a metallic coating provided on one side and a PTC element arranged therebetween. The PTC element is provided on oppositely disposed main side surfaces with a respective metallization which is electrically conductively connected to the coating of one of the insulating layers The metallization provided on one of the main side surfaces is assigned only to one potential for energizing the PTC element, and the metallization provided on the other of the main side surfaces is only assigned to the other potential for energizing the PTC element, as well as an electric heating device containing such a PTC heating element. With regard to better heat decoupling, the insulating layer may be glued to the PTC element, and the coating of the insulating layers is in direct electrically conductive contact with the metallization of the PTC element.

A fluid system of an internal combustion engine is provided with a heating device in a heating chamber. An electric heating element of the heating device is arranged between two holding bodies such that the heating element electrically and thermally contacts a contact section of at least one of the holding bodies. The heating chamber has an inner volume region between the holding bodies and at least one outer volume region arranged on an outer side of the holding bodies. The inner and outer volume regions allow fluid to flow through. The inner volume region has an enlarged section with a first spacing measured between the holding bodies. The holding bodies have a second spacing measured in a region of the contact section. The first spacing is greater than the second spacing at least at a circumferential side of the contact section facing the enlarged section.

A honeycomb structure including a honeycomb having porous partition walls extending between inflow and outflow end faces to define cells, an outermost peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb. Each electrode is formed in a strip shape extending in a direction of the cells. In a cross section orthogonal to the extending direction of the cells, one electrode is disposed on a side opposed to the other electrode. The honeycomb has an outer peripheral region including the outer peripheral wall, a central region, and an intermediate region. An average electric resistivity A of a material constituted of the outer peripheral region, an average electric resistivity B of a material constituted of the central region and an average electric resistivity of C of a material constituted of the intermediate region satisfy the relationship: A≤B<C.

A PTC heating element and an electric heating device containing such a PTC heating element are disclosed. The PTC heating element comprises two insulating layers with a metallic coating provided on one side and a PTC element arranged therebetween which is provided on oppositely disposed main side surfaces with a respective metallization which is electrically conductively connected to the coating of one of the insulating layers. The metallization provided on one of the main side surfaces is assigned only to one potential for energizing the PTC element. The metallization provided on the other main side surface is assigned to only the other potential for energizing the PTC element. The metallization of the one main side surface of the PTC element and the metallization of the other main side surface of the PTC element are formed in such a way that the current path (P) through the PTC element is extended relative to the thickness (D) of the PTC element.

A method of forming a plurality of individual heating cables sets includes creating at least a portion of a master cable set by coupling alternating sections of cold and hot cable section, each section of cold cable section having a length twice a model cold cable section length and each section of hot cable section having a length twice a model hot cable section length. A continuous metallic ground sheath is applied about substantially all of the master cable set and a continuous outer jacket is applied about the continuous metallic ground sheath. The master cable set is segmented at defined locations to create a plurality of individual heating cable sets having an overall length of the model hot cable section length plus the model cold cable section length.

A thermal radiation element includes a substrate, made of a semiconductor, having a first principal plane and a second principal plane, a first conductor layer and a second conductor layer provided on the first principal plane and the second principal plane, respectively, and an electrode pair provided in an outer edge region of the first conductor layer.

A PTC heating device for introduction into a receiving pocket of an electric heating device includes at least one PTC element, a conductor track that is electrically connected to the PTC element, and insulating layers that are abutted in a thermally conductive manner against the PTC element. A frame-shaped casing joins the at least one PTC element, the conductor track, and the insulating layers as a unit. The frame-shaped casing has a leading frame member with elastic guide tabs which, in an initial assembly state, project on oppositely disposed sides of the frame-shaped casing over the heat-emitting open surface respectively associated with them, which are inclined obliquely from the leading frame member in a direction of the open surface, and which are elastically pivotable. During heating device assembly, the PTC heating device is centered and guided by the elastic guide tabs when introduced into a heating rib of a heating chamber.

An interior trim of a motor vehicle. The interior trim includes a substrate with an outer side which faces an interior of the motor vehicle, a heating film with an outer surface which faces the interior of the motor vehicle, and a decorative layer. The heating film is attached to the outer surface of the substrate. The decorative layer is attached to the outer surface of the heating film. The heating film has no conducting paths and generates heat through an ohmic resistance of the heating film.