Granted Patent B2

US 12,700,524 · App. 18/252,446 · Granted Aug 4, 2026

Inventors: Byoung Chul Park (Daejeon, KR); Joo Ho Lee (Gyeonggi-do, KR); Yong Won Lee (Gyeonggi-do, KR); Jae Hyun Hong (Daejeon, KR); Min Seong Kim (Daejeon, KR)

Assignee: HANWHA COMPOUND CORPORATION

H01B17/60H01B3/48H01B7/0208H01B9/021H01B19/04

Abstract

Claims (22)

1 . A high-voltage shielded wire comprising:

a core composed of a conductive material;

an insulation layer enveloping the core;

an electromagnetic shielding layer surrounding the insulation layer and employing an electromagnetic shielding composite resin composition; and

a coating layer covering the electromagnetic shielding layer and composed of an insulation material,

wherein the electromagnetic shielding composite resin composition contains a thermoplastic resin, a metal-coated carbon fiber, carbon black, a carbon nanotube, and an additive, and

wherein the thermoplastic resin comprises a polyurethane,

wherein the additive contains an antioxidant, and

wherein the antioxidant contains any one or more of a phenol-based compound or a thioether-based compound,

wherein the carbon fiber has a diameter of 4 μm to 10 μm,

wherein the carbon nanotube has an aspect ratio of 100 to 1,000, and wherein the metal-coated carbon fiber is coated with a multi-layer metal comprising nickel and copper.

2 . The high-voltage shielded wire as claimed in claim 1 , wherein the electromagnetic shielding composite resin composition contains 5 to 50 parts by weight of metal-coated carbon fibers, 0.1 to 5 parts by weight of carbon black, and 0.1 to 5 parts by weight of carbon nanotubes, based on 100 parts by weight of the thermoplastic resin.

3 . The high-voltage shielded wire as claimed in claim 1 , wherein the metal coated on the metal-coated carbon fiber contains any one or two or more selected from the group consisting of palladium, nickel, copper, silver, aluminum, and magnesium.

4 . The high-voltage shielded wire as claimed in claim 1 , wherein the electromagnetic shielding composite resin composition further contains 0.1 to 5 parts by weight of the antioxidant.

5 . The high-voltage shielded wire as claimed in claim 4 , wherein the additive also contains any one or more of a lubricant, a compatibilizer, a colorant, a release agent, a flame retardant, or a plasticizer.

6 . The high-voltage shielded wire as claimed in claim 1 , wherein the electromagnetic shielding composite resin composition has an electromagnetic shielding efficiency of 30 dB or more, as measured by ASTM ES7 in a frequency band of 1 GHz.

7 . The high-voltage shielded wire as claimed in claim 1 , further comprising a metal tape between the electromagnetic shielding layer and the coating layer.

8 . The high-voltage shielded wire as claimed in claim 1 , wherein the high-voltage shielded wire has an electromagnetic shielding efficiency of 25 dB or more, as measured according to IEC 62153-4-6 based on a 3 MHz wire.

9 . A method for preparing the electromagnetic shielding composite resin composition of claim 1 , the method comprising:

a) preparing a matrix resin by kneading the thermoplastic polyurethane elastomer, the phenol-based compound antioxidant, and carbon black;

b) preparing a resin composite by adding and kneading metal-coated carbon fibers having a diameter of 4 μm to 10 μm to the matrix resin, wherein the metal-coated carbon fibers are coated with a multi-layer metal comprising nickel and copper; and

c) preparing the electromagnetic shielding composite resin composition by kneading the carbon nanotubes having an aspect ratio of 100 to 1,000 to the resin composite.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)