A self-bonding conductive wire and methods in which it is made and used. The wire comprises a conductor, an insulator, and a self-bonding outer coating. The self-bonding outer coating is a polyester polyether block copolymer. The insulator is an ethylene/tetrafluoroethylene copolymer, one or more layers of which may be used to insulate the conductor. The self-bonding capabilities of the wire may be activated by heating the wire, causing the outer coating to thermoplastically deform and fuse, allowing for the creation of self-supporting structures such as large bobbin-less coils. The use of the polyester polyether block copolymer for the self-bonding outer coating is superior to other materials, in which significant degradation of qualitative properties following self-bonding is observed, resulting in a superior self-bonding conductive wire.

Winding wire articles may include a conductor formed into a predefined shape having at least one bend. Additionally, a plurality of cavities may be formed within the conductor. Insulation may also be formed around the conductor.

This invention relates to silane moisture curable polymer composition and more particularly, to such a polymer composition that is highly diluted by a non-silane containing component, while retaining good high temperatures properties. The invention is a polymer composition comprising a base resin comprising less than 59 wt % of a silane crosslinkable polyethylene (A), an thermoplastic polyolefin free from silane groups (B) wherein the polymer composition comprise a filler with a BET Nitrogen Surface Area larger than 3 m.sup.2/g (C). The invention also relates to a cable layer of such polymer composition suitably a semiconducting layer of a power cable.

A composition includes specific amounts of a poly(phenylene ether), a hydrogenated block copolymer, a polyolefin, a flame retardant, and a hindered amine light stabilizer, and the composition minimizes or excludes benzotriazole ultraviolet absorbing agents. The composition exhibits desirable color stability on exposure to ultraviolet radiation, while reducing or eliminating migration of ultraviolet absorber to the surface of an insulated conductor or jacketed cable, and reducing or eliminating staining in the presence of metallic copper. The composition is useful for extrusion coating and injection molding.

In order to increase the adhesion of an insulating coating (2) to an electric conductor (1), preferably of copper or aluminum, an insulated electric conductor comprising an electric conductor (1), preferably made of copper or aluminum, with an insulating coating (2) is proposed according to the invention, wherein the insulating coating (2) either comprises at least one insulating layer (3) made of thermoplastic material, or the insulating layer (3) and a plastic-containing intermediate layer (4, 5), obtainable by a method in which the electric conductor (1) is placed under a protective gas atmosphere and is bombarded with ions of the protective gas in a gas plasma in order to remove an oxide layer formed on a surface of the electric conductor (1) and/or to increase the surface energy of the electric conductor (1), and subsequently either the at least one insulating layer (3) or, in the case that the coating (2) comprises the plastic-containing intermediate layer (4, 5), at least the plastic-containing intermediate layer (4, 5) is applied directly to the surface of the electric conductor (1) under a protective gas atmosphere.

A cable has an electrically conductive core (4) made of one or more individual conductors and having an insulation surrounding the core (4). The insulation is made from a silicone material. The insulation has at least two separate silicone layers (1, 2). The two layers are formed from different silicone material. The first silicone layer (1) surrounds the core (4). The first silicone layer (1) is designed as an insulation inner layer made from a non-pressurized peroxide-crosslinked silicone material. The second silicone layer is applied to the insulation inner layer. It is an insulation outer layer and is formed from an addition-crosslinked silicone material.

A cable core includes: an internal conductor; a foamed dielectric that includes a fluororesin and is formed on the internal conductor by extrusion molding; and a skin layer that covers the foamed dielectric, and is configured such that a foaming rate of the foamed dielectric is 80% or more, an average foamed cell diameter of the foamed dielectric is 10 m or less, and a standard deviation of a foamed cell diameter of the foamed dielectric is 2.5 or less.

Oil field services apparatus and method. The apparatus comprises a conveyance system operable for lowering and retrieving a downhole tool in and out of a wellbore. The conveyance system comprises a drum operable for rotating and receiving a line connectable with the downhole tool, a motor-generator mechanically connected with the drum, and an energy storage electrically connected with the motor-generator. The motor-generator may be operable for receiving electrical energy to impart torque to the drum and receiving torque from the drum to generate electrical energy. The energy storage may be operable for storing electrical energy received from the motor-generator.

The present invention discloses a flat cable, which comprises signal unit sets and the insulating layer which wraps and fixes the signal unit set. The signal unit set is formed by at least two signals units arranged substantially on the same plane at an interval or side by side. The left and right sides of the signal unit set are directly wrapped by insulating layers. The insulating layer is formed by splicing and bonding at least one insulating film, and the splicing points at two ends of the insulating film are located on the upper side or the lower side of the signal unit set. In the flat cable of the present invention, the length of the overlapping portion can be set as required, effectively preventing the phenomenon such as insulating film tear and short circuit caused by insulating film tear.

The present invention relates to an improved insulated conductor with a low dielectric constant and reduced materials costs. The conductor (12) extends along a longitudinal axis and an insulation (14, 14<1>) surrounds the conductor (12). At least on channel (16, 16<1>) in the insulation (14, 14<1>) extends generally along the longitudinal axis to form an insulated conductor. Apparatuses and methods of manufacturing the improved insulated conductors are also disclosed.