EMI Shielding Textile Fabric, Wrappable Sleeve Constructed Therefrom and Method of Construction Thereof

• US 20140262478A1
• Filed: 03/13/2013
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Federal-Mogul Powertrain, LLC (Apollo Global Management, Inc.)
• Original Assignee: Federal-Mogul Powertrain Incorporated (Apollo Global Management, Inc.)
• Inventors: Harris, David A., Malloy, Cassie M., Winters, Danny
• Granted Patent: US 9,913,415 B2
• Time in Patent Office: Days
• US Class Current: 174/393
• 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: D03D 1/0043 for elongated members, i.e. sleeves
• CPC Class Codes: D03D 1/0058 Electromagnetic radiation resistant
• CPC Class Codes: D03D 13/004 with weave pattern being non-standard or providing special effects
• CPC Class Codes: D03D 15/43 with differing diameters
• CPC Class Codes: D03D 15/47 multicomponent, e.g. blended yarns or threads multicomponent fibres or filaments D03D15/292
• CPC Class Codes: D03D 15/567 Shapes or effects upon shrinkage
• CPC Class Codes: D10B 2101/20 Metallic fibres
• CPC Class Codes: H05K 9/009 comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked

Abstract

A textile fabric, sleeve formed therefrom, and methods of construction thereof are provided. The fabric forms an elongate wall constructed from lengthwise extending warp yarns woven with widthwise extending weft yarns. At least some of the warp yarns are electrically conductive and have a first diameter. The weft yarns have a second diameter that is at least 25 percent less than the first diameter of the warp yarns. As such, the conductive warp yarns are brought into closer proximity with one another than if the weft yarns were the same diameter as the warp yarns. Accordingly, the ability of the fabric and sleeve formed therewith to provide shielding protection against EMI is enhanced.

Claims

1. A textile fabric for routing and protecting an electrical member against electromagnetic interference, comprising:

an elongate wall constructed from lengthwise extending warp yarns woven with widthwise extending weft yarns, at least some of said warp yarns being electrically conductive and having a first diameter and said weft yarns having a second diameter, said second diameter being at least 25 percent less than said first diameter.

2. The textile fabric of claim 1 wherein a plurality of said weft yarns are heat-settable polymeric yarn.

3. The textile fabric of claim 2 wherein said plurality of heat-settable polymeric yarns are heat-set to bias said wall into a self-wrapping configuration about a longitudinal central axis.

4. The textile fabric of claim 3 wherein said wall has opposite lengthwise extending edges that are biased in overlapping relation with one another by said heat-set yarns to provide a generally tubular cavity in which the member is received.

5. The textile fabric of claim 2 wherein a plurality of said warp yarns include a conductive wire extending about a non-conductive yarn.

6. The textile fabric of claim 1 wherein said warp yarns are woven to skip over at least 3 of said weft yarns.

7. The textile fabric of claim 6 wherein said warp yarns are woven in a satin weave.

8. The textile fabric of claim 6 wherein said satin weave is an 8 harness satin weave.

9. A woven textile sleeve for protecting an electrical member contained therein against EMI, comprising:

an elongate wall having opposite edges wrappable in overlapping relation with one another to form an enclosed cavity extending along a central axis between opposite ends, said wall having warp yarns extending generally parallel to said central axis woven with weft yarns extending transversely to said warp yarns, at least some of said warp yarns being electrically conductive and having a first diameter and said weft yarns having a second diameter, said second diameter being at least 25 percent less than said first diameter.

10. The woven textile sleeve of claim 9 wherein at least some of said weft yarns are heat-set to bias said opposite edges into overlapping relation with one another.

11. The woven textile sleeve of claim 9 wherein said wall is woven having a satin weave.

12. The woven textile sleeve of claim 9 wherein said conductive warp yarns include a conductive wire extending about a non-conductive yarn.

13. A method of constructing a fabric for protecting an electrical member against electromagnetic interference, comprising:

forming an elongate wall by weaving lengthwise extending warp yarns with widthwise extending weft yarns, with at least some of the warp yarns being electrically conductive and having a first diameter and with the weft yarns having a second diameter that is at least 25 percent less than the first diameter.

14. The method of claim 13 further including weaving the wall having a satin weave pattern.

15. A method of constructing a textile sleeve for protecting an electrical member contained therein against EMI, comprising:

forming an elongate wall having opposite edges extending along a central axis between opposite ends by weaving warp yarns extending generally parallel to the central axis woven with weft yarns extending transversely to the warp yarns, with at least some of the warp yarns being electrically conductive and having a first diameter and the weft yarns having a second diameter being at least 25 percent less than the first diameter; and

wrapping the wall to bring the opposite edges in overlapping relation with one another.

16. The method of claim 15 further including heat-setting at least some of the weft yarns to bias the opposite edges in overlapping relation with one another.

17. The method of claim 15 further including weaving the wall having a satin weave pattern.