An object of the present invention is to provide an improved partial discharge-resistant electrical insulating resin composition that can inhibit deterioration of an insulator due to partial discharge. The partial discharge-resistant electrical insulating resin composition of the present invention comprises boehmite alumina and a resin.

A method for producing a binder resin by a reaction of a cellulose derivative, a polyvinyl acetal, and a bonding agent that has in the molecule at least two functional groups that can react to hydroxyl groups in the polyvinyl acetal and the cellulose derivative. In the production method, the content of the bonding agent is at least double the molar quantity of whichever has the greater number of moles between the polyvinyl acetal and the cellulose derivative. The produced binder resin is favorable in a coating paste such as a conductive paste, and causes an improvement in film quality such as the smoothness and denseness of a coating film formed by the paste.

A charging cable is provided. The charging cable includes wires for supplying power, a wire for transferring a signal and a sheath, and exhibits substantially improved mechanical properties such as low-temperature flexibility and abrasion resistance, substantially improved chemical properties such as oil resistance and substantially improved electrical properties such as insulation resistance. Moreover, the charging cable has improved electrical, mechanical and chemical properties by improving insulation resistance, heat resistance and low-temperature flexibility of wires, as compared to conventional wires coated with polyvinylchloride (PVC).

Disclosed herein is a method of: placing between a cooling element and an opposing surface a slurry of: a dielectric powder containing barium titanate, a dispersant, a binder, and water; maintaining the cooling element at a temperature below the opposing surface to cause the formation of ice platelets perpendicular to the surface of the cooling element and having the powder between the platelets; subliming the ice platelets to create voids; sintering the powder to form the dielectric material; and filling the voids with the polymeric material. The process can produce a composite having: a sintered dielectric material of barium titanate and platelets of a polymeric material embedded in the dielectric material. Each of the platelets is perpendicular to a surface of the composite.

A method for manufacturing an insulated conductive material includes applying a masking material to one or more regions of a conductive material. Regions of the conductive material other than the masked regions are coated. The regions are coated by electrically charging the conductive material with a first charge polarity, providing a medium of electrically charged insulating material particles that are charged with an opposite polarity, and passing the charged conductive material through the medium, whereby the insulating material particles bind areas of the conductive material and form an insulating film on areas of the surface other than the one or more regions. Afterwards, the insulating film is cured and a solvent is applied to the masking material to thereby remove the masking material. The cured insulated material film is substantially unaffected by the solvent.

Twisted pair cables incorporated separators with cooling channels are described. A cable may include a plurality of twisted pairs of individually insulated electrical conductors, and a separator extending lengthwise along a longitudinal length of the cable may be positioned between at least two of the plurality of twisted pairs. The separator may include a flexible body configured to maintain the at least two pairs in a predetermined configuration. A first channel extending lengthwise may define a longitudinal cavity through the separator, and at least one second channel may extend from the first channel through the flexible body to an outer surface of the separator. Additionally, the cable may include a jacket formed around the plurality of twisted pairs and the separator.

A cable includes a plurality of electric wires, a tape member wound around the plurality of electric wires, and a jacket that covers an outer periphery of the tape member and includes an urethane-based resin. The tape member includes a nonwoven fabric including one of a polyester, a polypropylene, an aramid fiber, a nylon, an acrylic fiber and a glass fiber. An air permeability of the nonwoven fabric is not less than 30 cc/cm.sup.2/sec.

An electrically insulated cable that is excellent in in adhesion with a resin used for resin sealing is provided. According to the present invention, an electrically insulated cable (10) includes: a plurality of coated electric wires (11) and a sheath (12) covering outer peripheries of the plurality of coated electric wires, wherein an average value of surface roughness Rz of an outer surface of the sheath is 15 μm or more and 75 μm or less.

The present invention is a flame-retardant polyolefin/thermoplastic polyurethane formulation made from or containing a polyolefin, a thermoplastic polyurethane, and an intumescent, polyphosphate flame retardant composition. The invented system achieves elongations >400% and tensile strengths >1500 psi while the same polyolefin only achieved 100% elongation and <1000 psi tensile strength. Also, the present invention shows improved tape extrusion performance versus a comparable TPU only composition, indicating improved melt rheology/fabrication capability for extrusion applications.

The present invention relates to the coating of wires with coatings which are obtained by crosslinking blocked polyisocyanates. The coatings are characterized in that they are substantially free of urethane groups and the crosslinking of the monomers is predominantly effected by isocyanurate groups.