Wet processing method for catheter balloons
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United States of America Patent
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-
Jan 6, 2004
Grant Date -
Jul 25, 2002
app pub date -
Jan 24, 2001
filing date -
Jan 24, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for blowing a balloon from a tubular parison of a thermoplastic polymer material by radially expanding the parison at an elevated temperature and pressure, the process characterized in that: a) the polymer material includes a 'H-bonding' polymer which undergoes interchain hydrogen bonding between at least some segments thereof; b) the parison is conditioned in a high moisture environment prior to blowing, and c) the balloon is blown after moisture conditioning of the parison and without an intervening drying thereof. H-bonding polymers may be polyamides, polyurethanes or block copolymers containing a polyamide or polyurethane block. The process reduces occurrence of fish eye defects in the formed balloons.
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