Method to make tube-in-tube balloon
AssigneeBoston Scientific Scimed, Inc.
InventorsNao Lee, Ying Xiong, Joe Khammoungkhoune, John J. Chen
Life of this patent
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Abstract
A tube-in-tube assembled parison for preparation of an elongated medical device. The parison if formed by assembling in tube-in-tube fashion a first tube of orientable polymer material and a second tube formed of orientable polymer material disposed around the first tube, with an adhesive tie layer disposed between the first and second tubes. The tubes are brought into contact to form a unitary parison. The adhesive may allow movement between the polymer layers during balloon blowing. The first tube, or the second tube, or both, may have been longitudinally pre-stretched after formation thereof but before assembly of the parison.
Claims20
A method of making an expandable medical balloon, comprising:
- disposing an adhesive layer on a tubular parison, the tubular parison comprising polyamide, poly(ether-block-amide), or a combination thereof;
- and
- longitudinally pre-stretching the tubular parison from a first length to a second length;
- and
- radially expanding the tubular parison in a balloon mold, wherein the radial expansion comprises pressuring the assembly at a temperature and a pressure above ambient temperature or up to about 50° C. so as to expand the parison into a medical balloon, the parison having a wall thickness Ta and the medical balloon having a wall thickness Tb.
A method of making an expandable medical balloon, comprising:
- disposing a thermoplastic adhesive on a tubular parison, the tubular parison comprising a first polymer having a Shore D hardness of about 50 to about 75;
- and
- longitudinally pre-stretching the tubular parison from a first length to a second length;
- and
- radially expanding the tubular parison in a balloon mold, wherein the radial expansion comprises pressuring the assembly at a temperature and a pressure above ambient temperature or up to about 50° C. so as to expand the parison into a medical balloon, the parison having a wall thickness Ta and the medical balloon having a wall thickness Tb.
A method of making an expandable medical balloon, comprising:
- disposing an adhesive layer on a tubular parison, the tubular parison comprising polyamide, poly(ether-block-amide), or a combination thereof;
- longitudinally pre-stretching the tubular parison from a first length to a second length;
- and
- radially expanding the tubular parison in a balloon mold so as to form the parison into a medical balloon having a balloon wall thickness Tb,
- wherein the adhesive layer has a thickness Ta that is 20% or less of the balloon wall thickness Tb.
Dependencies are inferred from the claim text.