Abstract: A method for manufacturing a coaxial cable werein a polymer is irradiated and extruded around a metallic inner conductor and the polymer is then surrounded with a metallic outer conductor. The irradiated polymer may be irradiated, for example, via electron beam, for example, between 0.25 and 4 MRad.

Abstract: A method for manufacturing a coaxial cable werein a polymer is irradiated and extruded around a metallic inner conductor and the polymer is then surrounded with a metallic outer conductor. The irradiated polymer may be irradiated, for example, via electron beam, for example, between 0.25 and 4 MRad.

Abstract: A communications cable is provided having at least one elongate electrical conductor surrounded by a layer of insulating material, said layer comprising a foamed fluorinated polymer formed using a liquid or solid blowing agent having a vaporization temperature at ambient temperature of between about 140° F. and about 700° F. The elongate electrical conductors can be provided as at least one pair of twisted wires, each wire thereof surrounded by a layer of insulating material comprising the foamed fluorinated polymer. The communications cable includes insulated wires which possess a layer of foamed fluorinated polymer insulating material having uniform thickness and electrical properties along the length of the wire. In addition, the fluorinated polymer can be applied on the conductor in a relatively thin layer which minimizes the amount of fluorinated polymer material used to insulate the individual conductors.

Abstract: A communications cable is provided having at least one elongate electrical conductor surrounded by a layer of insulating material, said layer comprising a foamed fluorinated polymer formed using a liquid or solid blowing agent having a vaporization temperature at ambient temperature of between about 140.degree. F. and about 700.degree. F. The elongate electrical conductors can be provided as at least one pair of twisted wires, each wire thereof surrounded by a layer of insulating material comprising the foamed fluorinated polymer. The communications cable includes insulated wires which possess a layer of foamed fluorinated polymer insulating material having uniform thickness and electrical properties along the length of the wire. In addition, the fluorinated polymer can be applied on the conductor in a relatively thin layer which minimizes the amount of fluorinated polymer material used to insulate the individual conductors.

Abstract: A communications cable is provided having at least one elongate electrical conductor surrounded by a layer of insulating material, said layer including a chemically blown fluorinated polymer having a melting point of greater than about 480.degree. F. The elongate electrical conductors may be provided as at least one pair of twisted wires, each wire thereof surrounded by a layer of insulating material including the chemically blown fluorinated polymer. The fluorinated polymer is preferably a high melting fluorinated polymer and is chemically blown by a blowing agent such as the barium salt of 5-phenyltetrazole. The communications cable includes insulated wires which possess a layer of foamed fluorinated polymer insulating material having uniform thickness and electrical properties along the length of the wire. The fluorinated polymer can be applied on the conductor in a relatively thin layer which minimizes the amount of fluorinated polymer material used to insulate the individual conductors.