Protective sleeve fabricated with hybrid yarn having wire filaments and methods of construction
View Patent ↗A fabric sleeve and hybrid yarn filament used in construction of the sleeve for protecting elongate members against at least one of EMI, RFI or ESD, and methods of construction of the sleeve and hybrid yarn filament. The sleeve includes at least one interlaced hybrid yarn filament having a non-conductive filament and at least one conductive wire filament overlying an outer surface of the non-conductive filament. The hybrid yarn filament is arranged in electrical communication with itself or other hybrid yarn filaments to provide uniform shielding against EMI, RFI, and/or ESD.
1. A fabric sleeve for protecting elongate members against at least one of EMI, RFI or ESD, comprising:
at least one hybrid yarn filament having a non-conductive filament and at least one continuous conductive wire filament overlying an outer surface of said non-conductive filament and extending radially outward from an adjacent portion of said outer surface;
wherein said wire filament is interlaced in electrical communication with itself or with other ones of said wire filaments along a portion of said sleeve to provide protection to the elongate members against at least one of EMI, RFI or ESD;
wherein a plurality of yarn filaments extend along a warp direction corresponding to a length of the sleeve, at least some of said warp direction yarn filaments being provided as said at least one hybrid yarn filament and a plurality of yarn filaments extend along a fill direction generally perpendicular to said warp direction, at least some of said fill direction yarn filaments being provided as said at least one hybrid yarn filament, said wire filaments overlying said warp direction non-conductive filaments are in electrical communication with said wire filaments overlying said fill direction non-conductive filaments; and
wherein said at least some of said warp direction yarn filaments or said at least some of said fill direction yarn filaments have at least two of said continuous conductive wire filaments and the other of said at least some of said warp direction yarn filaments or said at least some of said fill direction yarn filaments have a single one of said continuous conductive wire filaments.
2. The fabric sleeve of claim 1 wherein each of said warp direction yarn filaments have said non-conductive filament and said at least one continuous conductive wire filament overlying an outer surface of said non-conductive filaments.
3. The fabric sleeve of claim 2 wherein each of said fill direction yarn filaments have said non-conductive filament and said at least one continuous conductive wire filament overlying an outer surface of said fill direction non-conductive filaments.
4. The fabric sleeve of claim 3 wherein each of said conductive wire filaments in said warp direction are in electrical communication with each of said conductive wire filaments in said fill direction.
5. The fabric sleeve of claim 1 wherein said at least two of continuous conductive wire filaments are arranged in opposite helical directions to one another.
6. The fabric sleeve of claim 1 wherein at least some of said warp direction yarn filaments or said fill direction yarn filaments have at least three of said continuous conductive wire filaments overlying an outer surface of said non-conductive filament.
7. The fabric sleeve of claim 6 wherein said fill direction yarn filaments have a single one of said continuous conductive wire filaments.
8. The fabric sleeve of claim 7 wherein said warp direction yarn filaments are substantially the same denier as said fill direction yarn filaments.
9. The fabric sleeve of claim 6 wherein at least one of said three continuous wire filaments has a helical angle that is different from the remaining continuous wire filaments.
10. The fabric sleeve of claim 1 wherein said warp direction yarn filaments are substantially the same denier as said fill direction yarn filaments.
11. The fabric sleeve of claim 1 further including at least one interlaced drain wire arranged in electrical communication with said at least one conductive wire filament.
12. The fabric sleeve of claim 11 wherein said at least one drain wire is interlaced at axially spaced locations along the length of said sleeve to form float sections of said drain wire.
13. The fabric sleeve of claim 1 wherein said non-conductive filament is a multifilament.
14. The fabric sleeve of claim 1 wherein said at least one conductive wire filament is between about 20-100 μm in diameter.
15. The fabric sleeve of claim 1 wherein said sleeve has opposite free edges extending along the length of said sleeve, said sleeve being biased into a self-wrapped shape so that said edges overlap one another.
16. The fabric sleeve of claim 15 wherein said sleeve includes heat-settable yarns that are heat-set into said self wrapped shape.
17. The fabric sleeve of claim 16 wherein said heat-settable yarns are monofilaments of thermoplastic.
18. The fabric sleeve of claim 15 wherein said sleeve has yarns placed in tension to bias said sleeve into said self wrapped shape.
19. The fabric sleeve of claim 15 further including at least one fastener arranged to maintain said opposite edges in releasable attached relation with one another.
20. The fabric sleeve of claim 19 wherein said at least one fastener includes hooks attached adjacent one of said free edges and loops attached adjacent the other of said free edges.
21. The fabric sleeve of claim 1 wherein said sleeve has a seamless wall extending circumferentially about said sleeve.
22. The fabric sleeve of claim 1 wherein said at least one conductive wire filament is twisted with said non-conductive filament.
23. The fabric sleeve of claim 1 wherein said at least one conductive wire filament is served about said non-conductive filament.
24. A fabric sleeve for protecting elongate members against at least one of EMI, RFI or ESD, comprising:
at least one hybrid yarn filament having a non-conductive filament and at least one continuous conductive wire filament overlying an outer surface of said non-conductive filament;
wherein said wire filament is interlaced in electrical communication with itself or with other ones of said wire filaments along a portion of said sleeve to provide protection to the elongate members against at least one of EMI, RFI or ESD;
wherein a plurality of yarn filaments extend along a warp direction corresponding to a length of the sleeve, at least some of said warp direction yarn filaments being provided as said at least one hybrid yarn filament and a plurality of yarn filaments extend along a fill direction generally perpendicular to said warp direction, at least some of said fill direction yarn filaments being provided as said at least one hybrid yarn filament, said wire filaments overlying said warp direction non-conductive filaments are in electrical communication with said wire filaments overlying said fill direction non-conductive filaments;
wherein said at least some of said warp direction yarn filaments have at least two of said continuous conductive wire filaments;
wherein said at least some of said fill direction yarn filaments have a single one of said continuous conductive wire filaments; and
wherein said non-conductive filament in said at least some of said warp direction yarn filaments has a smaller denier than said non-conductive filament in said at least some of said fill direction yarn filaments.
25. The fabric sleeve of claim 24 wherein said warp direction yarns are substantially the same denier as said fill direction yarns.