New method to make tube-in-tube balloon

Patent metadata

Field	Value
Publication number	US-2016263357-A1
Application number	US-201615164521-A
Country	US
Kind code	A1
Filing date	May 25, 2016
Priority date	Mar 2, 2006
Publication date	Sep 15, 2016
Grant date	—

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.

First claim

What is claimed is:

1 . 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.

2 . The method of claim 1 , wherein the disposing step comprises coextruding the adhesive layer with the tubular parison.

3 . The method of claim 1 , wherein the second length is about 2 . 5 times greater than the first length.

4 . The method of claim 1 , wherein the tubular parison has been longitudinally pre-stretched and wherein the second length is about 1.0 times to about 2.5 times greater than the first length.

5 . The method of claim 1 , wherein the adhesive layer provides 20% or less of the tubular parison wall thickness.

6 . The method of claim 1 , wherein the adhesive layer provides 10% or less of the tubular parison wall thickness.

7 . The method of claim 1 , wherein the adhesive layer has a thickness that is about 0.05 μm to about 2 μm.

8 . The method of claim 1 , wherein the tubular parison comprises poly(ether-block-amide).

9 . The method of claim 1 , wherein the adhesive comprises thermoplastic, emulsion, solvent or curable compositions.

10 . The method of claim 1 , wherein the adhesive comprises a thermoplastic adhesive.

11 . The method of claim 1 , further comprising the step of radially expanding the tubular parison in a balloon mold, the parison comprising an underlying layer formed of poly(ether-block-amide) and an overlying layer formed of polyamide.

12 . The medical balloon of claim 11 , 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 T p and the medical balloon having a wall thickness T b .

13 . The balloon of claim 12 , wherein the adhesive layer has a thickness T a that is 20% or less of the balloon wall thickness T b .

14 . The balloon of claim 12 , wherein the adhesive layer has a thickness T a that is 10% or less of the balloon wall thickness T b .

15 . 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.

16 . The method of claim 15 , further comprising radially expanding the tubular parison in a balloon mold.

17 . The method of claim 15 , wherein the tubular parison comprises an underlying layer comprising a second polymer having a Shore D hardness that is higher than the first polymer, the method further comprising radially expanding the tubular parison in a balloon mold.

18 . The method of claim 15 , wherein the tubular parison has been longitudinally pre-stretched and wherein the second length is about 2.5 times greater than the first length.

19 . The method of claim 17 , wherein the underlying layer comprises poly(ether-block-amide) and the overlying layer comprises nylon.

20 . The method of claim 15 , wherein the disposing step comprises coextruding the thermoplastic adhesive and the tubular parison.

Assignees

• Boston Scient Scimed Inc

Inventors

• Lee Nao
• Xiong Ying
• Khammoungkhoune Joe
• Chen John J

Classifications

• A61M25/1029 Primary

  Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril · CPC title

• B29K2105/0079

  Liquid crystals · CPC title

• B29C65/484

  Moisture curing adhesives · CPC title

• B29C55/26

  biaxial · CPC title

• B29C65/1406

  Ultraviolet [UV] radiation · CPC title