Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Aumitomo Wiring Systems, Ltd.

Tatsuya Shimada

Yuta Yasuyoshi

Kinji Taguchi

Ryoma Uegaki

Takaki Endo

Masashi Sato

Toru Shimizu

Yoshiaki Yamano

Tsuyoshi Nonaka

Kousuke Shiraki

Masato Inoue

Satoshi Murao

Masashi Kimura

Yukihiro Sakamoto

Yoshiharu Deguchi

Hideaki Shibata

Seigou Nakano

Masashi Satou

Yuuji Tanaka

Iwao Wada

Atsushi Kasamatsu

Kenichiro Iwama

Mamoru Kondou

A communication cableis provided with a conductoran insulation layercontaining an organic polymer and covering an outer periphery of the conductora metal foilfor covering an outer periphery of the insulation layerand a magnetic sheath layercontaining an organic polymer and a powdered magnetic material and covering an outer periphery of the metal foilA tensile modulus of elasticity of the magnetic sheath layeris lower than that of the insulation layerAssuming that an organic polymer having a melting point of 100° C. or lower is a low melting point polymer and a mass ratio of the low melting point polymer to organic polymer components constituting each layer is a low melting point component ratio, the low melting point component ratio is larger in the magnetic sheath layerthan in the insulation layer

Communication cable

A communication cable includes a solid sheath on an outer periphery of a signal cable having a plurality of insulated wires and in which transmission characteristics hardly decrease due to a pressure in extrusion-molding a sheath. The signal cableincludes a plurality of insulated wireseach having a conductorand an insulation coatingcovering an outer periphery of the conductor, and a solid sheathcovering an outer periphery of the signal cable. A melt flow rate of a constituent material of the sheathmeasured at 200° and with a load of 2.16 kg is 0.25 g/10 min. or more.

A shielded communication cable. The shielded communication cable includes a pair of insulated wires twisted with each other containing a conductor and an insulation covering which covers the conductor and has the relative dielectric constant of 2.5 or lower, a braided shield which covers the pair of insulated wires, a film-shaped shield which contains a metal film and longitudinally laps the pair of the insulated wires over the braided shield and a jacket having an inner diameter of 3.5 mm or smaller which covers the film-shaped shield. The pair of insulated wires are twisted with each other with a twist pitch of 30 times of an outer diameter of each of the insulated wires or smaller, and the shielded communication cable has a characteristic impedance in range of 100±5Ω.

Shielded communication cable

A composition for a wire coating material containing a silane-crosslinked polyolefin which is excellent in flame-retardancy, fusion resistance, and heat-deformation resistance, and an insulated wire and a wiring harness coating the composition. A composition for a wire coating material contains (A) a silane-grafted polyolefin which is a polyolefin graft-modified with a silane coupling agent, (B) an unmodified polyolefin, (C) a modified polyolefin having one or more functional groups selected from the group consisting of a carboxy group, an ester group, an acid anhydride group, an amino group, and an epoxy group, (D) a flame retardant, and (E) a crosslinking catalyst. The polyolefin of (A) the silane-grafted polyolefin has a density of 0.855 to 0.890 g/cmin an ungrafted state and has a melting point of 80° C. or higher, and the unmodified polyolefin has a density of 0.855 to 0.950 g/cm.

Composition for wire coating material, insulated wire, and wiring harness

A communication cable includes a coating layer that contains a powdery magnetic material and that can suppress the occurrence of a powdery substance containing the magnetic material when processing the coating layer. The communication cable further includes a conductor, an insulating coating that covers an outer circumstance of the conductor, and a magnetic sheath layer that covers an outer side of the insulating coating, and the magnetic sheath layer contains the magnetic material and the magnetic material has a particle shape with an average particle diameter of not more than 50 &#x3bc;m and an aspect ratio of not greater than 4.

Provided is an insulated electric wire, a wire harness, and a composition for an electric wire coating material with which the amount of a filler, which is the flame retardant, can be reduced as much as possible without using electron beam crosslinking, the composition having a high heat resistance, a high gel fraction, flexibility, and good workability of assembling a wire harness. An electric wire coating material is made of a composition comprising (A) a silane-grafted polyolefin obtained by grafting a silane coupling agent onto a polyolefin having a density of 0.855 to 0.885 g/cm, (B) an unmodified polyolefin having a density of 0.890 to 0.955 g/cm, (C) a modified polyolefin modified by one or more functional groups selected from a carboxylic acid group, an acid anhydride group, an amino group, an acrylic group, a methacrylic group, and an epoxy group, (D) a bromine-based flame retardant and antimony trioxide, (E) a crosslinking catalyst batch, (F) zinc oxide and an imidazole-based compound, or zinc sulfide, (G) an antioxidant, (H) a metal deactivator, and (I) a lubricant.

Composition for electric wire coating material, insulated electric wire, and wire harness

A flame-retardant electric wire coating material composition that can improve heat resistance without using electron beam cross-linking, has no risk of reducing the mechanical characteristics and chemical resistance due to no metal hydroxides being added thereto as flame retardants, and can suppress the formation of die lip build-up and the like during manufacturing to achieve favorable productivity, and an insulated electric wire and a wire harness. The electric wire coating material composition may include:

Electric wire coating material composition, insulated electric wire, and wire harness

A wire harness including a wire fitting is provided that maintains the length of the portion of the wire bundle that extends to the outside of the wire fitting reliably at a tolerance range without impeding the freedom of bending the wire bundle. A wire harness includes a wire fitting having a base and a cover covering a portion of a wire bundle together with the base. The base is provided with a protrusion that pierces the insulated wires at a portion further to an outer edge of the base than a portion of the wire bundle that is tied together by a first tie member, the wire bundle extending from the base to an outside of the base.

Wire harness and wire fitting

To provide a composition for a wire coating member containing a non-crosslinked material at a low cost, which has superior flame retardancy, and is excellent in heat resistance, wear resistance and flexibility, and to provide an insulated wire and a wiring harness containing the composition. The composition contains (A) polypropylene, (B) a polyolefin elastomer, (C) a bromine flame retardant, (D) an antimony trioxide, (E) magnesium hydroxide, either one of (F) (F1) a zinc sulfide and (F2) a zinc oxide and (F3) mercaptobenzimidazole, and (G) a hindered phenolic antioxidant. The insulated wire includes a conductor and an insulation coat made from the composition, wherein the insulation coat has a thickness of 0.5 mm or less, and the insulated wire has an external diameter of 4 mm or less. The wiring harness includes the insulated wire.

Composition for wire coating member, insulated wire, and wiring harness

A composition for a wire coating member having flame retardancy that is heat resistant and productive without using electron irradiation crosslinking, and an insulated wire and a wiring harness having the same. The insulated wire includes a wire coating member containing the composition for the wire coating member that contains water-crosslinkable polyolefin containing polyolefin that is modified by a silane coupling agent, unmodified polyolefin, modified polyolefin that is modified by a functional group, a bromine flame retardant, a cross-linking catalyst, a phenolic antioxidant, and either one of a zinc sulfide, and a zinc oxide and an imidazole compound. The insulated wire is prepared by extrusion-coating a conductor with the composition to form the wire coating member around the conductor, and the wire coating member is water-crosslinked.

A wire harness including a wire fitting that holds a wire in a predetermined shape is provided. A wire fitting includes a base molded to an uneven plate-shape and a cover covering a wiring space of the base. In the base, an outer frame portion formed projecting around the wiring space on a wiring portion forming a bottom plate includes an inner edge step portion, an intermediate plate portion, and an outer edge step portion. In the intermediate plate portion, which projects outward, a plurality of through holes for wire fastening are formed linearly along the perimeter of the wiring space, the number of the through holes for wire fastening being at least the number of wire fasteners attached to that portion of a wire that extends from the wiring portion to the outside thereof.

A flame retardant that is arranged to improve the cold resistance and the productivity of a composition, a flame-retardant composition, an insulated wire, a wiring harness, and a method for manufacturing the flame-retardant composition. The flame retardant includes a pulverized natural mineral which is mainly composed of magnesium hydroxide, wherein the pulverized natural mineral is surface-treated with an organic high polymer such as polyolefin. The amount of surface treatment is within a range of 0.1 to 10 mass %. The flame-retardant composition includes 30 to 250 parts by mass of the flame retardant with respect to 100 parts by mass of an organic high polymer such as polyolefin. The insulated wire includes a conductor and the flame-retardant composition which covers the conductor, and the wiring harness includes the insulated wire.

Growing community of inventors

Yokkaichi, Japan

Tatsuya Shimada