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AssigneeBoston Scientific Scimed, Inc.
InventorsLixiao Wang, John Chen, Jeffrey Lindquist, Nao Lee, Douglas Devens
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A tubular parison for forming a medical device balloon. The parison is formed of a polymeric material, for instance a thermoplastic elastomer. The parison has an elongation at break which is not more than 80% of the elongation of the bulk polymeric material. The elongation of the parison is controlled by altering extrusion conditions. Balloons prepared from the parisons provide higher wall strength and/or higher inflation durability than balloons prepared from conventional parisons of the same material.
A method of making a parison for forming a medical device balloon, the method comprising extruding a tube of polymeric material to form the tube, wherein the extrusion is controlled to provide the extruded tube with an elongation at break which is not more than 80% of the elongation at break of the bulk polymeric material.
A method of making a parison for forming a medical device balloon, the method comprising extruding a tube of polymeric material to form the tube, the extrusion having a draw down ration of about 8 or higher.
A method of making a parison for forming a medical device balloon, the method comprising extruding a tube of polymeric material from an extruder having a barrel where the mixture is kept in molten state at a barrel temperature and a die zone where the molten material is pushed through a die to form the tube, wherein the die zone is kept at a temperature at least 5° F. below the barrel temperature.
7-24. (canceled)
Dependencies are inferred from the claim text.