Dilatation catheter balloons with improved puncture resistance
AssigneeE. I. Du Pont de Nemours and Company
InventorsGeorge Joseph Ostapchenko, Donna Lynn Visioli
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Abstract
Multi-layer puncture-resistant biaxially oriented coextruded films or tubings are disclosed for use in dilatation balloon catheters. The catheter balloons so formed comprise a first, inner layer of an orientable thermoplastic resin; a second layer of a thermoplastic inomeric olefin copolymer secured to the outside surface of the first layer; and an optional third layer of an orientable thermoplastic resin secured to the outside surface of the second layer. Processes for forming the dilatation catheter balloons herein are also disclosed.
Claims11
A dilatation catheter balloon suitable for use in percutaneous transluminal coronary angioplasty comprising:
- a first, inner layer comprising at least 80% by weight of a biaxially oriented thermoplastic resin selected from the group consisting of polyamides, polyesters, polyolefins, and blends thereof, and up to 20% by weight of a thermoplastic elastomer selected from the group consisting of polyurethanes, polyether ester block copolymers, and modified olefin copolymers, said first, inner layer having an inside surface and an outside surface and a thickness of 5-56 micrometers;
- and
- a second layer of a thermoplastic ionomeric olefin copolymer, said second layer having an inside surface and an outside surface and a thickness 0.5-5 micrometers, with the inside surface thereof secured to the outside surface of said first, inner layer.
A dilatation catheter balloon suitable for use in percutaneous transluminal coronary angioplasty comprising a melt blend of 80% to 95% by weight of a biaxially oriented thermoplastic resin selected from the group consisting of polyesters, polyolefins, and blends thereof, and 5% to 20% by weight of a thermoplastic elastomer having a hardness of at least 75D and selected from the group consisting of polyurethanes, polyether ester block copolymers, and modified olefin copolymers, and having a single wall thickness of 5-75 micrometers.
Dependencies are inferred from the claim text.