Medical device balloons with improved strength properties and processes for producing same
AssigneeBoston Scientific Scimed, Inc.
InventorsLixiao Wang, John Jianhua Chen, Jeffrey S. Lindquist, Nao Pao Lee, Douglas A. Devens
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Abstract
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.
Claims12
A tubular parison for forming a medical device balloon, the parison being formed of a polymeric material, the parison having an elongation at break which is not more than 80% of the elongation at break of the bulk polymeric material.
An extruded tubular parison for forming a medical device balloon, said parison as extruded and cooled prior to any further processing steps toward formation of said balloon, the parison being formed of a single polymeric material, the parison having an elongation at break, measured on a 3 inch sample of the parison as extruded and cooled, the elongation at break being no more than 80% of the elongation at break of the single polymeric material determined on the bulk material according to ASTM D-638.
Dependencies are inferred from the claim text.