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 80 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 having a filament count from 5 filaments to 20 filaments;
wherein the sheath has a diameter of about 25 10 microns to about 250 microns; and
wherein the textured fabric plurality of loops has a loop density of about 400 from 900 loops/in 2 to about 1,000 1,200 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 comprising yarns having a diameter from 20 microns to 80 microns; and
a plurality of loops projecting from the base layer, the plurality of loops comprising a textured multifilament yarn having a diameter from 10 microns to 250 microns and a filament count from 5 filaments to 20 filaments;
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the textured fabric plurality of loops has a loop density of about 400 from 900 loops/in 2 to about 1,000 1,200 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 13 , wherein the warp and weft base layer comprises 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 plurality of loops is formed from a composite core-sheath yarn and 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 13 , wherein the sheath textured multifilament yarn 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 0.110 inches.
29 . The textured fabric of claim 13 , wherein the core-sheath yarn has a TPI of about 20 to about 40 wherein the plurality of loops is formed from a composite core-sheath yarn.
30 . The textured fabric of claim 13 29 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core and wherein the core-sheath yarn has a TPI of about 20 to about 40.
31 . A bioprosthetic heart valve comprising the textured fabric of claim 13 .
32 . A textured fabric for a bioprosthesis comprising:
a base layer comprising yarns having a diameter from 20 microns to 80 microns; and
a plurality of loops projecting from the base layer, , the plurality of loops comprising a textured multifilament yarn having a diameter from 10 microns to 250 microns and filament count from 5 filaments to 20 filaments;
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 0.110 inches. and
wherein the plurality of loops has a loop density from 900 loops/in 2 to 1,200 loops/in 2 .
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 32 , wherein the warp and weft base layer comprises 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 plurality of loops is formed from a composite core-sheath yarn comprising a core and a sheath that is made from a different material from the core, and 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 32 , wherein the sheath textured multifilament yarn 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 wherein the plurality of loops is formed from a composite core-sheath yarn comprising a core and a sheath that is made from a different material from the core.
49 . The textured fabric of claim 32 48 , wherein the sheath is wrapped around a core the core, the sheath being provided externally of the core, and wherein the core-sheath yarn has a TPI of about 20 to about 40.
50 . A bioprosthetic heart valve comprising the textured fabric of claim 32 .
51 . A textured fabric for a bioprosthesis comprising:
a base layer comprising yarns having a diameter from 20 microns to 80 microns; and
a plurality of loops projecting from the base layer, the plurality of loops comprising a textured multifilament yarn having a diameter from 10 microns to 250 microns and a filament count from 5 filaments to 20 filaments;
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 . and
wherein the plurality of loops has a loop density from 900 loops/in 2 to 1,200 loops/in 2 .
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 51 , wherein the warp and weft base layer comprises 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 and sheath that is made from a different material from the core and 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 51 , wherein the sheath textured multifilament yarn 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 0.110 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.