BALLOON FOR MEDICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a balloon which lessens the force needed to extract a balloon catheter from the body.

SOLUTION: The balloon for medical device is formed by a method which extends the tube of a thermoplastic polymer material consisting of a block copolymer material radially in order to form a first diameter balloon at a first temperature under the first pressure. The formed balloon is annealed at a second temperature lower than the first temperature under a second pressure which is lower than the first pressure and higher than an atmosphere pressure over enough time to contract to a smaller second diameter than the first diameter. The balloon is consecutively installed in a catheter.

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