公开(公告)号：US6399884B1

公开(公告)日：2002-06-04

申请号：US59725600

申请日：2000-06-19

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SHUKUSHIMA SATOSHI ,  FUJITA TARO ,  TSUJINO ATSUSHI ,  HIRAKAWA YOSHIHIRO ,  SANO MASATO ,  OOTSUKA HIROYUKI

IPC: H01B3/44 ,  H01B3/00

CPC classification number: H01B3/441

Abstract: 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 ±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.

Abstract translation: 导体直径为0.4mm以下，绝缘厚度为0.8mm以下且满足小于1.6的等效介电常数的发泡聚烯烃绝缘电线，等效介电常数的波动极限小于或等于± 0.1，导体剥离力大于或等于100g / 50mm。 使用包含10重量％以上离聚物的聚烯烃。 膨胀率为55％以上的聚烯烃在导体上挤出，使用化学发泡剂和/或惰性气体形成发泡度为50％以上的发泡绝缘层。 该线适用于高速数据传输。

公开(公告)号：JPH11213759A

公开(公告)日：1999-08-06

申请号：JP2158598

申请日：1998-01-20

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： YADOSHIMA SATOSHI ,  FUJITA TARO ,  TSUJINO ATSUSHI ,  HIRAKAWA YOSHIHIRO ,  SANO MASATO ,  OTSUKA HIROYUKI

IPC: C08J9/04 ,  B29C44/00 ,  B29C47/02 ,  B29K23/00 ,  B29K105/04 ,  B29K705/00 ,  B29L9/00 ,  C08L23/00 ,  C08L23/26 ,  H01B3/44 ,  H01B7/02 ,  H01B13/14

Abstract: PROBLEM TO BE SOLVED: To provide a thin and polyolefin insulated electric wire suitable for high speed data communication and having high adhesion strength between a conductor and insulating layer, good appearance, and low dielectric constant without unevenness, and highly foamed insulating layer. SOLUTION: This electric wire is a foamed polyolefin-insulated electric wire satisfying following three conditions: a conductor diameter of 0.4 mm ϕ or smaller and an insulating coating thickness of 0.8 mm or thinner, an equivalent dielectric constant =100 g/50 mm. A polyolefin containing 10 wt.% of more of ionomer is used for the electric wire. Manufacture of the electric wire includes process of forming a foamed layer on a conductor by foaming-extrusion at swelling ratio >=55% and foaming degree of the polyolefin >=50% by using a chemical foaming agent and/or an inert gas foaming agent.

公开(公告)号：JP2001283649A

公开(公告)日：2001-10-12

申请号：JP2000094970

申请日：2000-03-30

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： OCHI YUJI ,  SANO MASATO

IPC: H01B7/08 ,  H01B7/17

Abstract: PROBLEM TO BE SOLVED: To provide a plural-core cable having improved terminal machining and handling performances for sufficient high-speed transmission. SOLUTION: The cable 1 (the plural-core cable) comprises cores 10, 20 having center conductors 11, 21 and insulators 12, 22 covering the respective peripheries of the center conductors 11, 21, a drain wire 4, and a shield conductor 5 covering the peripheries of the cores 10, 20 and the drain wire 4 in package. The cores 10, 20 are mutually differentiated in cable-sectional geometry on the shield conductor 5 by a cavity Sa caused by the existance of the drain wire 4 and have substantially the same effective dielectric constant or effective electrostatic capacity in the state of being covered with the shield conductor 5.