Surface modification of expanded ultra high molecular weight polyethylene (eUHMWPE) for improved bondability
First Claim
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1. A method for forming a balloon for an intraluminal catheter, comprising:
- a) forming a material including expanded high molecular weight polyolefin into a balloon shape having an inner surface and an outer surface to form a first layer;
b) treating at least a portion of the first layer with a chromic acid solution; and
c) providing a tubular polymeric second layer and attaching the second layer directly to a treated portion of at least one of the inner surface and outer surface of the first layer by fusion bonding.
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Abstract
A balloon catheter and a method of making the balloon catheter, having a balloon which is bonded to an elongated shaft, and which has a first layer and a second layer and an improved bond between the balloon and the shaft. One aspect of the invention is directed to a balloon in which the balloon first layer includes eUHMWPE and has at least a section that has been oxidized with a chromic acid solution to provide improved bondability.
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Citations
13 Claims
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1. A method for forming a balloon for an intraluminal catheter, comprising:
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a) forming a material including expanded high molecular weight polyolefin into a balloon shape having an inner surface and an outer surface to form a first layer;
b) treating at least a portion of the first layer with a chromic acid solution; and
c) providing a tubular polymeric second layer and attaching the second layer directly to a treated portion of at least one of the inner surface and outer surface of the first layer by fusion bonding. - View Dependent Claims (2, 3, 4, 6, 7, 8)
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5. The method of claim wherein 1, wherein c) comprises attaching the second layer to the inner surface of the first layer between a proximal skirt section and a distal skirt section of the first layer.
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9. A method of making a balloon catheter, comprising:
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a) positioning a balloon having an inner layer and an outer layer over a distal section of a catheter shaft, the outer layer having an inner surface and an outer surface, with at least a portion of the inner surface being oxidized from a chromic acid treatment; and
b) bonding proximal and distal end sections of the balloon to the catheter shaft to form the balloon catheter having at least a portion of the oxidized inner surface of the outer layer of the balloon bonded directly to the shaft by fusion bonding and wherein the outer layer of the balloon is expanded ultra high molecular weight polyolefin. - View Dependent Claims (10, 11, 12, 13)
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Specification