Knit textile sleeve with self-sustaining expanded and contracted states and method of construction thereof
A protective textile sleeve and method of construction thereof is provided. The sleeve has a knit, tubular wall extending lengthwise along a central longitudinal axis between opposite ends. The knit wall has a first state with a decreased length, increased cross-sectional area, as viewed in cross-section taken generally transversely to the central longitudinal axis, 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 includes knit, 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 an externally applied force.
1. A protective textile sleeve, comprising:
a knit, tubular wall extending lengthwise along a central longitudinal axis between opposite ends;
said wall having a first state with a decreased length, increased cross-sectional area, as viewed in cross-section taken generally transversely to said central longitudinal axis, and a second state with an increased length, decreased cross-sectional area, as viewed in cross-section taken generally transversely to said central longitudinal axis, and further including knit, heat-set yarns imparting a bias on said wall, said bias causing said wall to remain substantially in said first and second states absent some externally applied force.
2. The protective sleeve of claim 1 , wherein said wall includes both heat-set yarns and non-heat-set yarns.
3. The protective sleeve of claim 2 , wherein said wall includes warp knit stitches.
4. The protective sleeve of claim 1 , wherein said wall is fabricated entirely of heat-set yarns.
5. The protective sleeve of claim 1 , wherein said wall includes warp knit stitches.
6. The protective sleeve of claim 1 , wherein said wall has single course lapped stitches.
7. The protective sleeve of claim 6 , wherein said wall has rhombus-shaped openings.
8. The protective sleeve of claim 1 , wherein said wall has multiple course lapped stitches.
9. The protective sleeve of claim 8 , wherein said wall has hexagonal-shaped openings.
10. The protective sleeve of claim 8 , wherein said wall has honeycomb-shaped openings.
11. The protective sleeve of claim 1 , wherein said wall has pillar knit stitches.
12. A method of constructing a textile sleeve, comprising:
knitting a plurality of yarns with one another to form a seamless tubular wall extending lengthwise along a central longitudinal axis with at least some of said yarns being provided as heat-settable yarns, said tubular wall being moveable between a decreased length, increased cross-sectional area first state and an increased length, 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.
13. The method of claim 12 , further including knitting the wall with a plurality of heat-settable yarns and a plurality of non-heat-settable yarns.
14. The method of claim 12 , further including knitting the wall entirely with heat-settable yarns.
15. The method of claim 12 , further including knitting said wall in a warp knitting process.
16. The method of claim 12 , further including knitting the wall having rhombus-shaped openings.
17. The method of claim 12 , further including knitting the wall having hexagonal-shaped openings.
18. The method of claim 12 , further including knitting the wall having honeycomb-shaped openings.