Silver yarn, plied yarn silver yarn, functional fabric using same, and method for producing same

• US 8,549,829 B2
• Filed: 05/20/2010
• Issued: 10/08/2013
• Est. Priority Date: 05/20/2009
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: Song, Yong Sul, Kim, Moon Hoe, Won, Min Ho
• Primary Examiner(s): Hurley, Shaun R
• Application Number:
  US13/321,328
• Publication Number:
  US 20120060963A1
• Time in Patent Office: 1,237 Days
• Field of Search: 572/10, 572/12, 572/30, 572/36, 572/38
• US Class Current: 57/238
• CPC Class Codes: D02G 3/441 Yarns or threads with antistatic, conductive or radiation-shielding properties electroconductive, anti-static or radiation-shielding filaments D01F1/09, D01F1/106; anti-static fabrics D03D15/533; conducting, insulating or anti-static layers for floor coverings D06N7/0042
• CPC Class Codes: D02G 3/449 Yarns or threads with antibacterial properties filaments containing agents inhibiting growth of microorganisms D01F1/103
• CPC Class Codes: D04B 1/16 synthetic threads
• CPC Class Codes: D10B 2101/20 Metallic fibres
• CPC Class Codes: D10B 2401/16 antistatic; conductive
• CPC Class Codes: Y10T 428/12431 Foil or filament smaller than 6 mils

Abstract

The present invention relates to plied silver yarn using silver wire as thread, wherein the silver wire is entirely made of silver (Ag) or a silver alloy, to achieve antimicrobial properties and conductivity, as well as to functional fabric using same and to a method for producing same. The plied silver yarn of the present invention uses, as a core yarn, any one of at least one strand of silver wire and fiber yarn made from natural fiber or synthetic fiber, and uses the other as winding yarn covering the core yarn, wherein said one strand of silver wire is produced by casting a silver alloy containing pure silver or copper into a wire rod through directional solidification, and making the wire rod into a microfiber having a diameter of 0.015 to 0.05 mm through a pulling process.

Claims

1. A method of producing a plied silver yarn, comprising the steps of:

(a) preparing a silver wire that is produced by casting silver or a silver alloy into a wire rod through directional solidification and making the wire rod into the silver wire having a diameter ranging from 0.015 mm to 0.05 mm through a pulling process;

(b) obtaining a first plied silver yarn by plying at least one strand of the silver wire with a fiber yarn made from natural fiber or synthetic fiber, and twisting the silver wire and the fiber yarn to form the first plied silver yarn; and

(c) producing a second plied silver yarn by taking the first plied silver yarn as a core yarn and winding a second fiber yarn as a covering yarn around the first plied silver to form the second plied silver yarn, the second fiber yarn being formed of natural fiber or synthetic fiber.

2. The method according to claim 1, wherein the natural fiber is made from at least one of traditional Korean paper, polylactic acid (PLA), cotton, hemp, wool, and silk.

3. The method according to claim 1, wherein the synthetic fiber is made from at least one of nylon, polyester, polyvinyl chloride, polyacrylonitrile, polyamide, polyolefin, polyurethane, and Polyfluoroethylene.

4. The method according to claim 1, wherein the silver alloy contains copper of 0.1 wt % to 10 wt % and silver of 90 wt % to 99.9 wt %.