Woven fabric with shape memory element strands
View Patent ↗The disclosure relates to a woven fabric for use in an implantable medical device. The woven fabric comprises shape memory element strands woven with textile strands. At least one of the shape memory element strands has at least one float of at least five textile strands between binding points.
1. A woven fabric suitable for an implantable medical device comprising shape memory element strands and textile strands aligned in a first direction interlaced with textile strands aligned in a second direction, where at least one of the shape memory element strands aligned in the first direction has at least one float of at least five textile strands aligned in the second direction;
wherein the woven fabric has reduced binding points and low porosity.
2. The woven fabric of claim 1 , where the textile strands comprise a polymer selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane, and polytetrafluoroethylene, and combinations thereof.
3. The woven fabric of claim 1 , where the textile strands have a denier between about 0.1 denier to about 200 denier.
4. The woven fabric of claim 1 , where the shape memory element strands are selected from the group consisting of a shape memory polymer, a shape memory metal, and combinations thereof.
5. The woven fabric of claim 1 , where the shape memory element strands comprise superelastic nitinol wire.
6. The woven fabric of claim 5 , where the superelastic nitinol wire has a diameter between about 70 μm to about 125 μm.
7. The woven fabric of claim 1 , where the shape memory element strands in the first direction have at least one float of between six to twelve textile strands in the second direction.
8. The woven fabric of claim 1 , where the fabric comprises a primary weave selected from the group consisting of a plain weave, a basket weave, a rep weave, a rib weave, a twill weave, a leno weave, a mock leno weave, a satin weave, a double weave, or a variation thereof.
9. The woven fabric of claim 1 , where the fabric comprises a tubular double weave.
10. The woven fabric of claim 1 , further comprising any two or more of the following:
textile strands comprising a polymer selected from the group consisting of polyester, polypropylene, polyethylene, polyurethane, and polytetrafluoroethylene, and combinations thereof;
textile strands comprising a denier between about 0.1 denier to about 200 denier;
shape memory element strands selected from the group consisting of a shape memory polymer, a shape memory metal, and combinations thereof;
shape memory element strands comprising superelastic nitinol wire having a diameter between about 70 μm to about 125 μm;
shape memory element strands in the first direction having at least one float of between six to twelve textile strands in the second direction; and
a primary weave selected from the group consisting of a plain weave, a basket weave, a rep weave, a rib weave, a twill weave, a leno weave, a mock leno weave, a satin weave, a double weave, or a variation thereof.
11. A woven tubular stent-graft comprising shape memory element strands aligned in a first direction and polyester strands aligned in the first direction interlaced with textile strands aligned in a second direction; and
a primary weave comprising a tubular double weave;
where at least one of the shape memory element strands has at least one float of between six to twelve textile strands aligned in the second direction and
where the woven fabric has reduced binding points and low porosity.
12. The stent-graft of claim 11 , the shape memory element strands comprising a superelastic nitinol wire having a diameter between about 70 μm to about 125 μm and the textile strands comprising polyester having a denier between about microdenier to about 200 denier.