Textured woven fabric for use in implantable bioprostheses
A textured fabric for an implantable bioprosthesis is provided. The textured fabric can include a woven base layer and a plurality of loops projecting from the woven base layer. The plurality of loops are formed from a composite core-sheath yarn. The core can be made of a material that is different from the sheath. The core material can be selected to impart strength and resiliency to bending and the sheath material can be selected to impart a larger surface area or texture that facilitates cellular or tissue in-growth.
1. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer;
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the base layer is a woven base layer comprising warp and weft yarns and wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns;
wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal and a sheath that is made from a textured multifilament yarn;
wherein the sheath has a diameter of about 25 microns to about 250 microns; and
wherein the textured fabric has a loop density of about 400 loops/in 2 to about 1,000 loops/in 2 .
2. The textured fabric of claim 1 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.
3. The textured fabric of claim 1 , wherein the warp and weft yarns are made of the same material.
4. The textured fabric of claim 1 , wherein the warp and weft yarns are made of different materials.
5. The textured fabric of claim 1 , wherein the base layer has an EPI of about 150 to about 300.
6. The textured fabric of claim 1 , wherein the base layer has a PPI of about 100 to about 250.
7. The textured fabric of claim 1 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.
8. The textured fabric of claim 1 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.
9. The textured fabric of claim 1 , wherein the sheath has a denier of from about 15 to about 40.
10. The textured fabric of claim 1 , wherein the sheath has a filament count of from about 5 to about 20.
11. The textured fabric of claim 1 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.
12. A bioprosthetic heart valve comprising the textured fabric of claim 1 .
13. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer,
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the textured fabric has a loop density of about 400 loops/in 2 to about 1,000 loops/in 2 .
14. The textured fabric of claim 13 , wherein the base layer is a woven base layer comprising warp and weft yarns.
15. The textured fabric of claim 14 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.
16. The textured fabric of claim 14 , wherein the warp and weft yarns are made of the same material.
17. The textured fabric of claim 14 , wherein the warp and weft yarns are made of different materials.
18. The textured fabric of claim 14 , wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns.
19. The textured fabric of claim 14 , wherein the base layer has an EPI of about 150 to about 300.
20. The textured fabric of claim 14 , wherein the base layer has a PPI of about 100 to about 250.
21. The textured fabric of claim 13 , wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal.
22. The textured fabric of claim 21 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.
23. The textured fabric of claim 21 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.
24. The textured fabric of claim 21 , wherein the sheath is made of a textured multifilament yarn.
25. The textured fabric of claim 24 , wherein the sheath has a denier of from about 15 to about 40.
26. The textured fabric of claim 24 , wherein the sheath has a filament count of from about 5 to about 20.
27. The textured fabric of claim 24 , wherein the sheath has a diameter of about 25 microns to about 250 microns.
28. The textured fabric of claim 13 , wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.
29. The textured fabric of claim 13 , wherein the core-sheath yarn has a TPI of about 20 to about 40.
30. The textured fabric of claim 13 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.
31. A bioprosthetic heart valve comprising the textured fabric of claim 13 .
32. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer,
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the composite core-sheath yarn comprises a core and a sheath that is made from a different material from the core; and
wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.
33. The textured fabric of claim 32 , wherein the base layer is a woven base layer comprising warp and weft yarns.
34. The textured fabric of claim 33 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.
35. The textured fabric of claim 33 , wherein the warp and weft yarns are made of the same material.
36. The textured fabric of claim 33 , wherein the warp and weft yarns are made of different materials.
37. The textured fabric of claim 33 , wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns.
38. The textured fabric of claim 33 , wherein the base layer has an EPI of about 150 to about 300.
39. The textured fabric of claim 33 , wherein the base layer has a PPI of about 100 to about 250.
40. The textured fabric of claim 32 , wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal.
41. The textured fabric of claim 40 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.
42. The textured fabric of claim 40 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.
43. The textured fabric of claim 40 , wherein the sheath is made of a textured multifilament yarn.
44. The textured fabric of claim 40 , wherein the sheath has a denier of from about 15 to about 40.
45. The textured fabric of claim 43 , wherein the sheath has a filament count of from about 5 to about 20.
46. The textured fabric of claim 43 , wherein the sheath has a diameter of about 25 microns to about 250 microns.
47. The textured fabric of claim 32 , wherein the textured fabric has a loop density of about 400 loops/in 2 to about 1,000 loops/in 2 .
48. The textured fabric of claim 32 , wherein the core-sheath yarn has a TPI of about 20 to about 40.
49. The textured fabric of claim 32 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.
50. A bioprosthetic heart valve comprising the textured fabric of claim 32 .
51. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer,
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the composite core-sheath yarn comprises a core and a sheath that is made from a different material from the core; and
wherein the core-sheath yarn has a TPI of about 20 to about 40.
52. The textured fabric of claim 51 , wherein the base layer is a woven base layer comprising warp and weft yarns.
53. The textured fabric of claim 52 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.
54. The textured fabric of claim 52 , wherein the warp and weft yarns are made of the same material.
55. The textured fabric of claim 52 , wherein the warp and weft yarns are made of different materials.
56. The textured fabric of claim 52 , wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns.
57. The textured fabric of claim 52 , wherein the base layer has an EPI of about 150 to about 300.
58. The textured fabric of claim 52 , wherein the base layer has a PPI of about 100 to about 250.
59. The textured fabric of claim 51 , wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal.
60. The textured fabric of claim 59 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.
61. The textured fabric of claim 59 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.
62. The textured fabric of claim 59 , wherein the sheath is made of a textured multifilament yarn.
63. The textured fabric of claim 62 , wherein the sheath has a denier of from about 15 to about 40.
64. The textured fabric of claim 62 , wherein the sheath has a filament count of from about 5 to about 20.
65. The textured fabric of claim 62 , wherein the sheath has a diameter of about 25 microns to about 250 microns.
66. The textured fabric of claim 51 , wherein the textured fabric has a loop density of about 400 loops/into about 1,000 loops/in 2 .
67. The textured fabric of claim 51 , wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.
68. The textured fabric of claim 51 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.
69. A bioprosthetic heart valve comprising the textured fabric of claim 51 .
70. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer;
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the base layer is a woven base layer comprising warp and weft yarns and wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns;
wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal and a sheath that is made from a textured multifilament yarn;
wherein the sheath has a diameter of about 25 microns to about 250 microns; and
wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.
71. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer;
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the base layer is a woven base layer comprising warp and weft yarns and wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns;
wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal and a sheath that is made from a textured multifilament yarn;
wherein the sheath has a diameter of about 25 microns to about 250 microns; and
wherein the core-sheath yarn has a TPI of about 20 to about 40.