Yazaki Corporation

Kosuke Tashiro

Maki Yamada

Yukito Aoyama

Shota Sato

Rie Katsumata

Toshio Yamaguchi

Rie Tone

A twisted pair cable is a twisted pair cable obtained by twisting two electric wires each of which includes a conductor portion and an insulator covering an outer periphery of the conductor portion. The insulator is made of a resin composition containing polypropylene, an antioxidant, and a copper inhibitor. The insulator has an external appearance abnormality development time exceeding 3,000 hours during a test of compatibility with PVC in contact with PVC at 100° C. The insulator has a relative dielectric constant of 2.0 to 2.5 and a dielectric dissipation factor of 1.0×10or less when m electric field having a frequency of 1 GHz is applied.

Twisted wire and cable including the same

The conductive composition of the present embodiment contains metal nanoparticles having an average particle diameter of 30 nm to 600 nm, metal particles having an average particle diameter larger than that of the metal nanoparticles, a thermosetting resin having an oxirane ring in a molecule, a curing agent, and a cellulose resin. Then, the specific resistance of the conductor formed by applying and calcining the conductive composition on the substrate is preferably 5.0&#xd7;10&#x3a9;&#xb7;cm or less, and the conductor does not peel from the substrate when a tape having an adhesive force of 3.9 N/10 mm to 39 N/10 mm is pressed against the conductor and peeled off.

Conductive composition and wiring board using the same

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Shizuoka, Japan

Kosuke Tashiro