Abstract: An electrical wire or cable has a metallic conductor surrounded by at least one layer of polyimide winding tape. Over the insulator is at least one layer of polytetrafluoroethylene winding tape having a planoconvex cross section. The outermost layer of the polyimide winding tape has a bond with the polytetrafluoroethylene winding tape. The resulting construction has a smooth surface that can be marked.

Abstract: A high-frequency coaxial cable has a multi-layer insulation made of polymeric materials surrounding a central conductor and having an electrical shielding enclosing the insulation. The individual layers of the insulation are of fluoropolymers, with at least a first layer (2) that encloses the central conductor (1) being made of a fluoropolymer capable of being formed from a melt and an outer second layer (3) being made of a fluoropolymer not formable from a melt. In this cable, the second layer (3) is porous and is inter-engagedly connected with the surrounding shield (4).

Abstract: Extrudable halogen-free mixture comprising 95-5 weight-% polyetherimide polymer with an elastic modulus greater than 2000 MPa and 5-95 weight-% flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 2000 MPa. Electrical cable or wiring insulated with the extrudable halogen-free mixture comprising 60-90 weight-% of a polyetherimide polymer with an elastic modulus greater than 2000 MPa and 40-10 weight-% of a flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 1000 MPa. Electrical or optical cable or tubing sheathed with the extrudable halogen-free mixture comprising 40-10 weight-% of a polyetherimide polymer with an elastic modulus greater than 2000 MPa and 60-90 weight-% of a flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 1000 MPa.

Abstract: Recesses or openings (4) are arranged in a wall of an elongated tubular covering (3) made of resinous plastics that are resistant to temperature stresses and/or aggressive media; these openings are covered from the outside by a microporous layer (5) made of a fluoropolymer that is resistant to high temperatures.

Abstract: A flexible heating assembly includes a plurality of stranded or otherwise combined, insulated electrical conductors including feeder lines and, possibly, additional lines and constituting a subassembly; a heating conductor loops around this subassembly in multiple loops; at least two of the feeder line conductors have spaced apart and staggerdly arranged bare spots of removed insulation exposing the respective electrical conductor and the heating conductor where passing across such a bare area will be an intimate electrical contact making relationship without supplemental fastening; the loop density defined as number of loops per unit length on the subassembly is smaller in between bare spots and higher by at least 20% as to loops contacting conductors in a bare spot.

Abstract: A ribbon, preferably made of polytetrafluoroethylene and preferably in an unsintered configuration but having lens or trapezoidal cross section is used for wrapping elongated stock such as electrical conductors, tubes, or a removable mandrel, the wrapping to be made with overlapping edges followed by fusion to obtain a coherent tubular configuration.

Abstract: A flexible heating element is suggested to be made on a continuous basis, so that desired length can be cut therefrom and includes individual, electrically insulated feeder lines and a heating being interlooped in interweaving fashion with the feeder lines, there being discrete locations of the feeder lines from which the insulation has been removed for making contact with the heating conductor for supplying power thereto.

Abstract: A sleeve, terminal body, plug body, or the like receives tubular or ring-shaped, normally solid but thermoplastic filler elements, being traversed by a cable or conductor, particularly a portion from which insulation has been stripped. A plunger-like element receives also the cable or conductor and is inserted in one end of the sleeve, or body, the other end being closed by another plunger or body structure. Upon heating, the filler element melts and the plunger or plungers are forced further in to cause melted filler material to fill all voids; the deformed material resolidifies and seals and bonds all parts together.