Disclosed are a stress-resistant, creep-resistant, high-temperature resistant and high-insulation sheath material for a maglev train cable, and a manufacturing method and use thereof. A multiple chemical crosslinking structure is constructed by blending a functional polyvinylsilicone grease with ultra-high molecular weight polyethylene (UHMWPE) and a ceramicized silicone rubber as a cable material matrix and using electron beam irradiation. In addition, organic/inorganic fillers in the matrix can form physical crosslinking points in the material. A physical-chemical dual crosslinking structure is constructed in the matrix, which can limit the motion and relaxation of molecular chains and improve the interaction between the insulation layer and sheath layer and refractory layers such as fillers and mica tapes to avoid the relative displacement during the laying and operation and improve the high-temperature resistance, creep resistance and stress relaxation resistance of a UHMWPE cable sheath material.

A conductive trace residing on a stretchable medium, whose geometry in terms of one or more of width, thickness, material stack-up, and other properties are varied along the trace to reduce changes in trace resistance when the medium is stretched. In some embodiments, the geometry is arranged to encourage increased bending in selected regions of the trace to allow stretch deformation of the trace at least partially by elongation rather than entirely by dimensional deformation, thereby reducing conductivity change due to changes in cross-sectional area.

A conductive trace residing on a stretchable medium, whose geometry in terms of one or more of width, thickness, material stack-up, and other properties are varied along the trace to reduce changes in trace resistance when the medium is stretched. In some embodiments, the geometry is arranged to encourage increased bending in selected regions of the trace to allow stretch deformation of the trace at least partially by elongation rather than entirely by dimensional deformation, thereby reducing conductivity change due to changes in cross-sectional area.

A silicone rubber composition for waterproofing which is capable of maintaining waterproofing performance even if flexing and bending occur; a silicone rubber molded body for waterproofing; and a wire harness. This silicone rubber composition for waterproofing includes a thermosetting silicone rubber, has a Shore A hardness of not more than 25 after being cured, and has breaking strength of at least 5.0 MPa after being cured. The silicone rubber composition for waterproofing is used in a waterproofing part of a wire harness. It is preferable that a vinyl group-containing compound be included in addition to the thermosetting silicone rubber. A vinyl group-containing compound may be a monofunctional vinyl group-containing compound.

The electric wire according to one aspect of the present invention is an electric wire comprising an insulated electric wire and one or more coating layers covering the insulated electric wire, wherein at least one layer of the one or more coating layers is formed from a resin composition containing a thermoplastic polyurethane elastomer and an allophanate crosslinking agent. The electric wire having such a characteristic feature is excellent in abrasion resistance and heat resistance and can be produced at low costs.

An insulated wire having an electrical wire structure capable of reducing an outer diameter while an insulation property and a flame-retardant property are highly kept is provided. In the insulated wire including: a conductor; and a coating layer arranged on an outer periphery of the conductor, the coating layer includes: a semiconductive layer having a volume resistivity defined by JIS C2151 that is equal to or smaller than 1.010.sup.15 (cm); an insulating layer arranged on an outer periphery of the semiconductive layer, the insulating layer having a volume resistivity defined by JIS C2151 that is larger than 5.010.sup.15 (cm); and a flame-retardant semiconductive layer arranged on an outer periphery of the insulating layer, the flame-retardant semiconductive layer having a volume resistivity defined by JIS C2151 that is equal to or smaller than 1.510.sup.15 (cm) and having an oxygen index defined by JIS K7201-2 that is larger than 40.

An insulated wire having an electrical wire structure capable of reducing an outer diameter while an insulation property and a flame-retardant property are highly kept is provided. In the insulated wire including: a conductor; and a coating layer arranged on an outer periphery of the conductor, the coating layer includes: a semiconductive layer having a volume resistivity defined by JIS C2151 that is equal to or smaller than 1.010.sup.15 (cm); an insulating layer arranged on an outer periphery of the semiconductive layer, the insulating layer having a volume resistivity defined by JIS C2151 that is larger than 5.010.sup.15 (cm); and a flame-retardant semiconductive layer arranged on an outer periphery of the insulating layer, the flame-retardant semiconductive layer having a volume resistivity defined by JIS C2151 that is equal to or smaller than 1.510.sup.15 (cm) and having an oxygen index defined by JIS K7201-2 that is larger than 40.

A cover system for covering an electrical connection between first and second electrical cables each having a primary conductor and a neutral conductor, includes a neutral connector and a neutral connector cover. The neutral connector is configured to mechanically and electrically connect the neutral conductors of the first and second electrical cables. The neutral connector cover has a cavity. The neutral connection cover is configured to receive the neutral connector in the cavity to protect the neutral connector.

A cover system for covering an electrical connection between first and second electrical cables each having a primary conductor and a neutral conductor, includes a neutral connector and a neutral connector cover. The neutral connector is configured to mechanically and electrically connect the neutral conductors of the first and second electrical cables. The neutral connector cover has a cavity. The neutral connection cover is configured to receive the neutral connector in the cavity to protect the neutral connector.

A method of making a feed-thru connector assembly includes inserting a conductor within an opening within a housing of a pulse generator and dispensing a sealant in a gap between the conductor and portions of the housing adjacent to the conductor that define the opening of the housing and curing the sealant to form a seal comprising a polyisobutylene cross-linked network.