Smith, Gambrell & Russell, LLP
Thin-conductor foamed-polyolefin-insulated wire and manufacturing method thereof
A foamed-polyolefin-insulated wire having a conductor diameter of 0.4 mm or less and an insulation thickness of 0.8 mm or less and satisfying, an equivalent dielectric constant less than 1.6, the fluctuation limits of the equivalent dielectric constant less than or equal to &plusmn;0.1, and conductor stripping force greater than or equal to 100 g/50 mm. Polyolefin including 10 weight % or more of an ionomer is used. Polyolefin having a swelling ratio of 55 % or more is extruded over the conductor to form a foamed insulation layer with a foaming degree of 50 % or more using a chemical foaming agent and/or an inert gas. The wire is suitable for high-speed data transmission.
Sumitomo Electric Industries, Ltd.
H
H01B
inventional
Masato Atsushi Taro Yoshihiro Hiroyuki Satoshi
Sano Tsujino Fujita Hirakawa Ootsuka Shukushima