Disclosed is a polymer-ceramic composite, comprising: ceramic particles within a polymer matrix; wherein greater than or equal to about 70% of the ceramic particles by volume experience ceramic particle to ceramic particle contact; wherein a dielectric strength of the composite is greater than or equal to about 300 kilovolts per millimeter; and wherein a thermal conductivity of the composite is greater than or equal to about 10 watts per meter kelvin.

A cable includes a plurality of electric wires, which are laid helically around a center of the cable and along a central axis of the cable, and a sheath provided to cover respective peripheries of the plurality of electric wires together. The sheath includes an inner layer sheath made of a urethane resin, and an outer layer sheath provided around an outer periphery of the inner layer sheath to protect the inner layer sheath. The cable may further include a core member at its center. The sheath may be composed of a single layer instead of plural layers.

Aspects of the present invention relate to reinforced electric wires, particularly reinforced electric wires as used in holiday lighting such as Christmas light strings. In some embodiments, the reinforced electric wire can comprise a conductor, a reinforcing string or one or more reinforcing threads, and an insulator jacket. In some embodiments, the conductor comprises a plurality of conductor strands and one or more reinforcing strands arranged within an insulator jacket. Methods of making wires in accordance with various embodiments are also provided herein.

A process for manufacturing finished wire and cable having reduced coefficient of friction and pulling force during installation, includes providing a payoff reel containing at least one internal conductor wire; supplying the at least one internal conductor wire from the reel to at least one extruder; providing the least one extruder, wherein the at least one extruder applies an insulating material and a polymerized jacket composition over the at least one internal conductor wire, wherein the polymerized jacket composition comprises a predetermined amount by weight of nylon; and at least 3% by weight of a silica providing a cooling device for lowering the temperature of the extruded insulating material and the polymerized jacket composition and cooling the insulating material and the polymerized jacket composition in the cooling device; and, reeling onto a storage reel the finished, cooled, wire and cable for storage and distribution.

A conductor assembly including an electrically conductive material defining a longitudinal axis, a microporous membrane surrounding the electrically conductive material defining a series of pores, and a ceramic material within at least a first portion of the series of pores.

A communication cable includes an insulated wire including a conductor and a covering layer covering the conductor, the covering layer being made of an insulator, and a sheath covering an outer circumferential surface of the insulated wire, the sheath including a resin composition containing a polyolefin and a thermoplastic elastomer. A tensile modulus of elasticity of the sheath is 500 MPa or less, and a mass increase rate of the sheath is less than 50% by mass when the sheath is immersed in a diisononyl phthalate at 100 C. for 72 hours.

Aspects of the present invention relate to reinforced electric wires, particularly reinforced electric wires as used in holiday lighting such as Christmas light strings. In some embodiments, the reinforced electric wire can comprise a conductor, a reinforcing string or one or more reinforcing threads, and an insulator jacket. In some embodiments, the conductor comprises a single conductor strand. In some embodiments, the conductor comprises a plurality of conductor strands. In some embodiments, the wire comprises an insulator jacket having a plurality of channels therein, where a conductor is passed through the center channel, and reinforcing threads are passed through the other channels. Methods of making wires in accordance with various embodiments are also provided herein.

Provided is a cable having a sheath composition having flame retardancy and water resistance, and a sheath layer formed of the sheath composition. Specifically, the present invention relates to a sheath composition for simultaneously improving flame retardancy and water resistance of a sheath layer of a cable, which are in a trade-off relation with each other, and physical properties such as heat resistance, hardness, and wear resistance, improving appearance, and reducing manufacturing costs; and a cable having a sheath layer formed of the sheath composition.

Example embodiments provide a device that includes a main cable jacket including one or more sub-cable jackets, and each of the sub-cable jackets includes a number of conduits.

[Problem] To provide an insulation material that has an excellent volume resistivity while retaining the balance among various capabilities including the mechanical strength, the heat resistance, the oil resistance, the bleed-out resistance, the plasticizer migration resistance, and the like, equivalent to a resin composition containing an ordinary phthalate ester. [Solution] An insulation material containing a resin composition containing: an ester (i) having one or more constitutional unit represented by the following formula (A) (wherein R.sup.1 and R.sup.2 each independently represent an alkyl group having from 1 to 4 carbon atoms); and a resin (ii). ##STR00001##