Braided textile sleeve with integrated opening and self-sustaining expanded and contracted states and method of construction thereof
A protective textile having at least one integrated opening and method of construction thereof is provided. The sleeve includes a braided, tubular wall extending lengthwise in relation to a central longitudinal axis between opposite ends. The wall has a first state with a decreased length, increased cross-sectional area and a second state with an increased length, decreased cross-sectional area, as viewed in cross-section taken generally transversely to the central longitudinal axis. The wall further includes braided, heat-set yarns imparting a bias on the wall, wherein the bias causes the wall to remain substantially in the first and second states absent some externally applied force. The wall also includes at least one opening having a circumferentially continuous periphery bounding the opening, wherein the periphery is formed, at least in part, by braided yarns reversing direction from one S or Z helical direction to the opposite S or Z helical direction.
1. A protective textile sleeve, comprising:
a braided, tubular wall extending lengthwise in relation to a central longitudinal axis between opposite ends; and
said wall having at least one opening integrally formed therein, said at least one opening spanning a plurality of crossover nodes and having a circumferentially continuous periphery, said wall having a first state with a decreased length, extending from one of said opposite ends to the other of said opposite ends, increased cross-sectional area, and a second state with an increased length, extending from one of said opposite ends to the other of said opposite ends, decreased cross-sectional area, as viewed in cross-section taken generally transversely to said central longitudinal axis, and further including braided, heat-set yarns imparting a bias on said wall, said bias causing said wall to remain in each of said first and second states absent some externally applied force.
2. The protective sleeve of claim 1 wherein at least some of said heat-set yarns are braided in bundles, said bundles including a plurality of yarns twisted with one another.
3. The protective sleeve of claim 2 wherein at least some said bundles have loops interlinked with loops of another bundle.
4. The protective sleeve of claim 3 wherein at least some of said bundles are formed entirely of said heat-set yarns.
5. The protective sleeve of claim 3 wherein said wall includes non-heat-settable yarns.
6. The protective sleeve of claim 5 wherein at least some of said non-heat-settable yarns extend through at least some of said loops.
7. The protective sleeve of claim 6 wherein at least some of said non-heat-settable yarns extend co-helically between a pair of said bundles.
8. The protective sleeve of claim 3 wherein at least some of said bundles include non-heat-settable yarn.
9. The protective sleeve of claim 1 wherein said wall includes non-heat-settable yarns.
10. The protective sleeve of claim 2 wherein said bundles extend solely in one of a S or Z helical direction.
11. The protective sleeve of claim 2 wherein said bundles extend in opposite S and Z helical directions.
12. The protective sleeve of claim 1 wherein said wall has a non-circular outer periphery.
13. The protective sleeve of claim 1 wherein said at least one opening includes a plurality of openings.
14. The protective sleeve of claim 1 wherein said wall has opposite free edges extending along a length of the sleeve.
15. The protective sleeve of claim 14 wherein said opposite free edges are biased into overlapping relation with one another.
16. The protective sleeve of claim 1 wherein said wall is a seamless, circumferentially continuous wall.
17. A method of constructing a textile sleeve, comprising:
braiding a plurality of yarns with one another to form a wall extending lengthwise along a central longitudinal axis between opposite ends with at least some of said yarns being provided as heat-settable yarns, said wall having at least one opening spanning a plurality of crossover nodes integrally braided therein and being moveable between a decreased length, extending from one of said opposite ends to the other of said opposite ends, increased cross-sectional area first state and an increased length, extending from one of said opposite ends to the other of said opposite ends, decreased cross-sectional area second state; and
heat-setting said heat-settable yarns while said wall is in one of said first state and second state to impart a bias on said wall via said heat-set yarns, said bias causing said wall to remain in each of said first and second states absent an externally applied axial force causing said wall to be moved to the other of said first or second state.
18. The method of claim 17 further including braiding said wall with a lace-braiding machine.
19. The method of claim 17 further including braiding said wall as a seamless, circumferentially continuous wall.
20. The method of claim 17 further including braiding said wall as a flat layer having said opposite free edges.
21. The method of claim 20 further including wrapping said wall about a mandrel and then performing the heat-setting.
22. The method of claim 17 further including forming the wall including non-heat-settable yarn.
23. The method of claim 17 further including forming at least some of the yarns as bundles of yarn twisted with one another.
24. The method of claim 23 further including forming at least some of the bundles entirely with heat-settable yarn.
25. The method of claim 23 further including forming at least some of the bundles including non-heat-settable yarn.
26. The method of claim 23 further including interlinking loops of one bundle with loops of another bundle to interlock the bundles with one another.
27. The method of claim 17 further including forming said at least one opening as a plurality of openings.