Method of making a catheter balloon using a polyimide covered mandrel
First Claim
1. A method of making a tubular medical device or component formed of a fluoropolymeric material, comprising:
- a) wrapping a sheet of a fluoropolymeric material on a mandrel, the mandrel having a metallic core and a jacket of a polyimide material on an outer surface of the metallic core;
b) heating the wrapped sheet of fluoropolymeric material on the mandrel to fuse sections of the wrapped sheet together to form a fluoropolymeric tube; and
c) removing the fluoropolymeric tube from the mandrel.
1 Assignment
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Accused Products
Abstract
A method of making a catheter balloon or other tubular medical device or component, in which a sheet of polymeric material is wrapped on a mandrel and heated to fuse sections of the wrapped sheet together to form a tube. The mandrel has a metallic core and a jacket on an outer surface of the metallic core, and the wrapped sheet of polymeric material is heated without corroding the metallic core of the mandrel. In a presently preferred embodiment, the sheet is formed of a fluoropolymeric material, and the resulting fluoropolymeric tube forms at least a layer of a catheter balloon.
23 Citations
17 Claims
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1. A method of making a tubular medical device or component formed of a fluoropolymeric material, comprising:
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a) wrapping a sheet of a fluoropolymeric material on a mandrel, the mandrel having a metallic core and a jacket of a polyimide material on an outer surface of the metallic core;
b) heating the wrapped sheet of fluoropolymeric material on the mandrel to fuse sections of the wrapped sheet together to form a fluoropolymeric tube; and
c) removing the fluoropolymeric tube from the mandrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making at least a layer of a catheter balloon, comprising:
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a) wrapping a sheet of expanded polytetrafluoroethylene on a mandrel, the mandrel having a stainless steel or aluminum core and a thermoset polyimide jacket on an outer surface of the core, the thermoset polyimide jacket having an outer diameter and a length;
b) heating the wrapped sheet of expanded polytetrafluoroethylene on the mandrel at a temperature of about 350°
C. to about 390°
C. to fuse sections of the wrapped sheet together to form an expanded polytetrafluoroethylene tube, without corroding the core of the mandrel and without changing the outer diameter and length of the polyimide jacket; and
c) removing the expanded polytetrafluoroethylene tube from the mandrel, to form at least a layer of the catheter balloon. - View Dependent Claims (12, 13)
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14. A method of making a tubular medical device or component, comprising:
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a) placing a sheet of a polymeric material on a mandrel, the mandrel having a metallic core and a jacket on an outer surface of the metallic core, the jacket having an outer diameter and a length and being formed of a polymeric material with a glass transition temperature of at least about 390°
C. to about 420°
C.;
b) heating the sheet on the mandrel to an elevated temperature of about 350°
C. to about 390°
C. without changing the outer diameter and length of the jacket; and
c) removing the heat treated polymeric material from the mandrel. - View Dependent Claims (15, 16, 17)
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Specification