A telecommunications cable includes a plurality of twisted pairs of insulated conductors, a separator, a first jacket, one or more barriers and a second jacket. In addition, the plurality of twisted pairs of insulated conductors extends substantially along a longitudinal axis of the telecommunications cable. Further, the plurality of twisted pairs of insulated conductors includes an electrical conductor and an insulation layer. Furthermore, the separator separates each of the plurality of twisted pairs of insulated conductors. Moreover, the first jacket and the second jacket extend substantially along the longitudinal axis of the telecommunications cable. Also, the one or more barriers are positioned between the first jacket and the second jacket.

A macro-molecular leakage-free self-adhering aluminum foil has two layers of aluminum foil compounded using a PET film, and the other surfaces of each layer coated with a modified PE adhesive layer respectively; or air gaps in one surface or two surfaces are filled with nano-aluminum to form a permeable air gap-free surface. The foil has advantages: 1, high folding resistance, fatigue resistance and strength 2, wrapping self-adhering performance is good, and stripping strength formed after adhesion is several times as high as that of the prior art; 3, air gaps in the surface of the aluminum foil filled with nano-aluminum powder result in improved compactness; manufacture from low-grade aluminum foil, and so that rolling precision requirements are lowered, and manufacturing cost reduced; 4, insulating strength is high, shielding effect is good, the return loss phenomenon is avoided, and tensile strength is good.

Cable foil tape having random or pseudo-random patterns or long pattern lengths of discontinuous metallic shapes and a method for manufacturing such patterned foil tape are provided. In some embodiments, a laser ablation system is used to selectively remove regions or paths in a metallic layer of a foil tape to produce random distributions of randomized shapes, or pseudo-random patterns or long pattern lengths of discontinuous shapes in the metal layer. In some embodiments, the foil tape is double-sided, having a metallic layer on each side of the foil tape, and the laser ablation system is capable of ablating nonconductive pathways into the metallic layer on both sides of the foil tape.

In an electronic cable, a shielding tape prevents and mitigates the creation and propagation of micro-fractures and the deleterious effects thereof. In some embodiments, the shielding tape has layers which are oriented in a non-zero transverse relation with respect to each other, or have been treated to have non-zero orientations. Other embodiments include micro-fracture propagation mitigation means, such as perforations, ridges, waffling, and dimpling. In some embodiments, the layers of the shielding tape are bonded to each other with an electrically-conductive elastomeric adhesive. In other embodiments, the shielding tape is wrapped around a cable's dielectric and form an overlap gap, which is filled by an electrically-conductive elastomeric adhesive.

A communication cable includes two-core communication wires, a drain wire, and a metal foil collectively covering the two-core communication wires and the drain wire. The two-core communication wires are twisted, and the metal foil is wound around the two-core communication wires with an adhesion strength of 1.21 MPa or more. Preferably, the two-core communication wires are twisted with a twist pitch of 20 mm or more and 60 mm or less. The communication cable further may include a restraint formed of a resin coating extruded around the metal foil or a resin film laterally wound around the metal foil.

Cable foil tape having random or pseudo-random patterns or long pattern lengths of discontinuous metallic shapes and a method for manufacturing such patterned foil tape are provided. In some embodiments, a laser ablation system is used to selectively remove regions or paths in a metallic layer of a foil tape to produce random distributions of randomized shapes, or pseudo-random patterns or long pattern lengths of discontinuous shapes in the metal layer. In some embodiments, the foil tape is double-sided, having a metallic layer on each side of the foil tape, and the laser ablation system is capable of ablating nonconductive pathways into the metallic layer on both sides of the foil tape.

A cable includes a pair of conductors extending longitudinally and spaced apart from each other, an inner insulating layer circumferentially extending around an outside of the conductors and fixing the conductors, a conductive shielding layer circumferentially extending around an outside of the inner insulating layer, and an insulating sheath extending around an outer peripheral surface of the conductive shielding layer. The insulating sheath is at least one of an extruded layer and a heat shrinkable sleeve.

A cable includes a pair of conductors extending longitudinally and spaced apart from each other, an inner insulating layer circumferentially wrapped around an outside of the conductors and fixing the conductors, a conductive shielding layer circumferentially wrapped around an outside of the inner insulating layer, and an outer insulating layer circumferentially wrapped around an outer peripheral surface of the conductive shielding layer. At least one of the conductive shielding layer and the outer insulating layer includes a pair of diametrically opposed circumferential halves. Each circumferential half surrounds a part of a circumference of the inner insulating layer and extends longitudinally.

A macro-molecular leakage-free self-adhering aluminum foil has two layers of aluminum foil compounded using a PET film, and the other surfaces of each layer coated with a modified PE adhesive layer respectively; or air gaps in one surface or two surfaces are filled with nano-aluminum to form a permeable air gap-free surface. The foil has advantages: 1, high folding resistance, fatigue resistance and strength 2, wrapping self-adhering performance is good, and stripping strength formed after adhesion is several times as high as that of the prior art; 3, air gaps in the surface of the aluminum foil filled with nano-aluminum powder result in improved compactness; manufacture from low-grade aluminum foil, and so that rolling precision requirements are lowered, and manufacturing cost reduced; 4, insulating strength is high, shielding effect is good, the return loss phenomenon is avoided, and tensile strength is good.

In an electronic cable embodiment, a shielding tape includes a first metallic layer having a first orientation along which micro-fractures are predisposed to form, and a second metallic layer having a second orientation along which micro-fractures are predisposed to form. The first and second orientations have a non-zero transverse relation with respect to each other. An adhesive is disposed between the first and second metallic layers. Metallic solids are dispersed throughout the adhesive so as to define the adhesive with electrically conductive material characteristics.