Dimensionally stable balloons with fibers distributed in a...

A - Human Necessities – 61 – L

Patent

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Details

A61L 29/12 (2006.01) A61L 29/14 (2006.01) A61M 25/00 (2006.01) A61M 25/10 (2006.01) B29C 47/00 (2006.01)

Patent

CA 2451189

An inflatable medical balloon comprises a polymer matrix material and a plurality of fibers distributed in the matrix material. The plurality of fibers operatively adhere to the matrix material and provide reinforcement thereof. The fibers may be parallel or angularly oriented relative to the longitudinal balloon axis, and may be helically disposed thereabout. The fibers may be composed of material which has a greater tensile strength than the matrix material. The fibers may be microfibers formed by phase separation of a melt blend material during extrusion or polymer cores coextruded with the matrix material and surrounded thereby. The balloon may be formed of alternating layers of fiber-free polymer and layers of fiber-containing polymer.

L'invention concerne un ballonnet médical gonflable comprenant un matériau matriciel polymérique et une pluralité de fibres distribuées dans le matériau matriciel. Les fibres adhèrent au matériau matriciel et renforcent celui-ci. Les fibres peuvent être parallèles ou orientées de manière angulaire par rapport à l'axe longitudinal du ballonnet, et peuvent être placées autour de celui-ci de manière hélicoïdale. Les fibres peuvent être composées d'un matériau présentant une résistance à la traction supérieure à celle du matériau matriciel. Les fibres peuvent être des microfibres formées par séparation de phase d'un matériau mélangé par fusion au cours de l'extrusion ou des noyaux polymériques coextrudés avec le matériau matriciel et entourés de celui-ci. Le ballonnet peut être formé de couches alternées de polymère sans fibres et de couches de polymère à fibres.

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