Woven tubular thermal sleeve and method of construction thereof
A thermal sleeve for routing and protecting elongate members and method of construction thereof are provided. The sleeve has a tubular woven wall extending along a central axis between opposite open ends with an outer reflective foil layer fixed thereto. The wall is woven with lengthwise extending warp yarns and circumferentially extending fill yarns. The fill yarns include first and second fill yarns bundled in side-by-side abutting relation as a single pick, thereby forming discrete single pick bundles in axially spaced relation from one another. The first fill yarn is provided as a standard monofilament, while the second fill yarn is provided having a low melt material melted and bonded to the abutting first fill yarn and to portions of the abutting warp yarns, wherein the spaces between the discrete bundles remain substantially free of melted material, thereby further enhancing longitudinal flexibility of the sleeve.
1. A method of constructing a textile sleeve, comprising:
weaving an elongate tubular wall with warp yarns extending parallel to a central axis between opposite open ends of the wall and fill yarns extending transversely to the warp yarns;
providing the fill yarns including first fill yarn having a first melt temperature and a second fill yarn including an outer surface of low melt material having a second melt temperature less than the first melt temperature and weaving the first and second fill yarn in side-by-side relation to form discrete bundles extending circumferentially about the central axis;
applying an outer layer of foil on an outer surface of the woven wall; and
disposing the woven wall over a mandrel and heating the second fill yarn to cause the low melt outer surface of the second fill yarn to melt and bond with the abutting first fill yarn and abutting portions of the warp yarn to lock the bonded yarns together.
2. The method of claim 1 , further including spacing the discrete bundles axially from one another by spaces free from said melted low melt material.
3. The method of claim 1 , further including providing the second fill yarn as a bicomponent monofilament having a heat-settable core and heat setting the heat-settable core.
4. The method of claim 3 , further including providing the first fill yarn as a non-heat-settable material.
5. The method of claim 3 , further including providing the warp yarns as multifilaments.
6. The method of claim 1 , further including weaving the wall having a plain weave pattern.
7. The method of claim 1 , further including spiral wrapping the outer foil layer about the woven wall.
8. The method of claim 1 , further including cigarette wrapping the outer foil layer about the woven wall.