Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof

• US 8,143,517 B2
• Filed: 04/08/2009
• Issued: 03/27/2012
• Est. Priority Date: 12/20/2005
• Status: Active Grant

• Current Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Original Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Inventors: Detian, Huang, Kuroda, Hiromitsu, Matsui, Hakaru, Seya, Osamu, Okada, Ryohei, Masui, Shinichi, Nakagawa, Ryuji, Okikawa, Hiroshi
• Primary Examiner(s): Mayo, III, William
• Application Number:
  US12/420,576
• Publication Number:
  US 20090223713A1
• Time in Patent Office: 1,084 Days
• Field of Search: 174/36, 174/110.R, 174/113.R, 174/106.R, 174/102.R, 174/102.C, 174/103.C, 174/28
• US Class Current: 174/28
• CPC Class Codes: C22F 1/08 of copper or alloys based thereon
• CPC Class Codes: H01B 11/20 Cables having a multiplicity of coaxial lines
• CPC Class Codes: H01B 5/08 Several wires or the like stranded in the form of a rope

Abstract

An extra-fine copper alloy twisted wire including a plurality of copper alloy wires with a wire diameter of 0.010 to 0.025 mm twisted together, each of the copper alloy wires including 1 to 3 weight % of silver (Ag) and a balance consisting of a copper and an inevitable impurity, the copper alloy twisted wire further including a tensile strength of not less than 850 MPa, and an electrical conductivity of not less than 85% IACS. The extra-fine copper alloy twisted wire includes a solid insulation with a thickness of not more than 0.07 mm formed on an outer circumference of the extra-fine insulated wire.

Claims

1. A coaxial cable, comprising:

a heat treated extra-fine copper alloy twisted wire comprising seven copper alloy wires each of which comprises a wire diameter of 0.010 to 0.025 mm, and 1 to 3 weight % of silver (Ag) and a balance consisting of copper and an inevitable impurity, the twisted wire further comprising a tensile strength of not less than 850 MPa, and an electrical conductivity of not less than 85% IACS;

a foamed insulation formed on an outer circumference of the extra-fine copper alloy twisted wire;

an outer conductor comprising a plurality of conductor wires wound on an outer circumference of the foamed insulation along a longitudinal direction thereof in a spiral form; and

a jacket layer formed on a surface of the outer conductor,

wherein the extra-fine copper alloy twisted wire comprises a lowering rate in electric resistance of not less than 6% after the heat treatment and a lowering rate in tensile strength of not more than 20% after the heat treatment.

2. The coaxial cable according to claim 1, wherein:

the extra-fine copper alloy twisted wire is heat-treated, and comprises a lowering rate in electric resistance of not less than 6% after the heat treatment and a lowering rate in tensile strength of not more than 20% after the heat treatment.

3. The coaxial cable according to claim 1, further comprising:

a plated layer comprising tin (Sn), silver (Ag) or nickel (Ni) and formed on a surface of the extra-fine copper alloy wire.

4. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.021 mm and not more than 0.025 mm, and

the coaxial cable comprises an electric resistance of not more than 7500 Ω

/km, and a capacitance of 30 to 80 pF/m.

5. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.018 mm and not more than 0.022 mm, and

the coaxial cable comprises an electric resistance of not more than 10000 Ω

/km, and a capacitance of 30 to 80 pF/m.

6. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprise a wire diameter of more than 0.016 mm and not more than 0.020 mm, and

the coaxial cable comprises an electric resistance of not more than 13000 Ω

/km, and a capacitance of 30 to 80 pF/m.

7. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.014 mm and not more than 0.018 mm, and

the coaxial cable comprises an electric resistance of not more than 15500 Ω

/km, and a capacitance of 30 to 80 pF/m.

8. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.013 mm and not more than 0.017 mm, and

the coaxial cable comprises an electric resistance of not more than 17000 Ω

/km, and a capacitance of 30 to 80 pF/m.

9. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.011 mm and not more than 0.015 mm, and

the coaxial cable comprises an electric resistance of not more than 23500 Ω

/km, and a capacitance of 30 to 80 pF/m.

10. The coaxial cable according to claim 1, wherein:

the copper alloy wire comprises a wire diameter of more than 0.008 mm and not more than 0.012 mm, and

the coaxial cable comprises an electric resistance of not more than 40000 Ω

/km, and a capacitance of 30 to 80 pF/m.

11. A multicore cable, comprising:

a tension member or an central interposition; and

a plurality of the coaxial cables according to claim 1 twisted together on an outer circumference of the tension member or the central interposition.

12. A multicore cable, comprising:

a tension member or an central interposition; and

a plurality of coaxial cable units comprising a plurality of the coaxial cables according to claim 1 bundled together, and twisted together on an outer circumference of the tension member or the central interposition.

13. A multicore cable, comprising:

a plurality of the coaxial cables according to claim 1 juxtaposed at a constant pitch.

14. An extra-fine insulated wire, comprising:

a heat treated extra-fine copper alloy twisted wire comprising a plurality of copper alloy wires with a wire diameter of 0.010 to 0.025 mm twisted together, each of the copper alloy wires comprising 1 to 3 weight % of silver (Ag) and a balance consisting of a copper and an inevitable impurity, the copper alloy twisted wire further comprising a tensile strength of not less than 850 MPa, and an electrical conductivity of not less than 85% IACS; and

a solid insulation with a thickness of not more than 0.07 mm formed on an outer circumference of the extra-fine insulated wire,

wherein the extra-fine copper alloy twisted wire comprises a lowering rate in electric resistance of not less than 6% after the heat treatment and a lowering rate in tensile strength of not more than 20% after the heat treatment.

15. The extra-fine insulated wire according to claim 14, further comprising:

a plated layer comprising tin (Sn), silver (Ag) or nickel (Ni) and formed on a surface of the extra-fine copper alloy wire.

16. A coaxial cable, comprising:

an outer conductor comprising a plurality of conductor wires wound on an outer circumference of the extra-fine insulated wire according to claim 14 along a longitudinal direction thereof in a spiral form; and

a jacket layer formed on a surface of the outer conductor.

17. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.021 mm and not more than 0.025 mm, and

the coaxial cable comprises an electric resistance of not more than 7200 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 0.6 to 1.0 dB/m (at a frequency of 10 MHz), and a bending life of not less than 20000 times under conditions of a bend (R)=2 mm and a load=50 g.

18. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.018 mm and not more than 0.022 mm, and

the coaxial cable comprises an electric resistance of not more than 9500 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 0.8 to 1.2 dB/m (at a frequency of 10 MHz), and a bending life of not less than 20000 times under conditions of a bend (R)=2 mm and a load=50 g.

19. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a the wire diameter of more than 0.016 mm and not more than 0.020 mm, and

the coaxial cable comprises an electric resistance of not more than 12200 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 1.0 to 1.5 dB/m (at a frequency of 10 MHz), and a bending life of not less than 20000 times under conditions of a bend (R)=2 mm and a load=50 g.

20. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.014 mm and not more than 0.018 mm, and

the coaxial cable comprises an electric resistance of not more than 14700 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 1.1 to 1.6 dB/m (at a frequency of 10 MHz), and a bending life of not less than 30000 times under conditions of a bend (R)=2 mm and a load=50 g.

21. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.013 mm and not more than 0.017 mm, and

the coaxial cable comprises an electric resistance of not more than 16500 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 1.1 to 1.6 dB/m (at a frequency of 10 MHz), and a bending life of not less than 30000 times under conditions of a bend (R)=2 mm and a load=20 g.

22. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.011 mm and not more than 0.015 mm, and

the coaxial cable comprises an electric resistance of not more than 22500 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 1.7 to 2.4 dB/m (at a frequency of 10 MHz), and a bending life of not less than 30000 times under conditions of a bend (R)=2 mm and a load=20 g.

23. The coaxial cable according to claim 16, wherein:

the copper alloy wire composing the extra-fine insulated wire comprises a wire diameter of more than 0.008 mm and not more than 0.012 mm, and

the coaxial cable comprises an electric resistance of not more than 38000 Ω

/km, a capacitance of 100 to 130 pF/m, an attenuation of 2.5 to 3.8 dB/m (at a frequency of 10 MHz), and a bending life of not less than 10000 times under conditions of a bend (R)=2 mm and a load=20 g.

24. A multicore cable, comprising:

a tension member or a central interposition; and

a plurality of the coaxial cables according to claim 16 twisted together on an outer circumference of the tension member or the central interposition.

25. A multicore cable, comprising:

a tension member or an central interposition; and

a plurality of coaxial cable units comprising a plurality of the coaxial cables according to claim 16 bundled together and twisted together on an outer circumference of the tension member or the central interposition.

26. A multicore cable, comprising:

a plurality of the coaxial cables according to claim 16 juxtaposed at a constant pitch.

27. A multicore cable, comprising:

a tension member or an central interposition; and

a coaxial cable and the extra-fine insulated wire according to claim 14 twisted together on an outer circumference of the tension member or the central interposition,

wherein the coaxial cable comprises an outer conductor comprising a plurality of conductor wires wound on an outer circumference of the extra-fine insulated wire according to claim 16 along a longitudinal direction thereof in a spiral form, and a jacket layer formed on a surface of the outer conductor.

28. A multicore cable, comprising:

a tension member or an central interposition; and

a plurality of the extra-fine insulated wires according to claim 14 twisted together on an outer circumference of the tension member or the central interposition.

29. A multicore cable, comprising:

a central conductor wire, and

a plurality of the extra-fine insulated wires according to claim 14 wound on the central conductor wire at a constant pitch.