Heat recoverable article

B - Operations – Transporting – 29 – C

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Details

B29C 61/06 (2006.01) F16L 47/02 (2006.01) F16L 47/22 (2006.01) B29C 53/56 (2006.01)

Patent

CA 2222651

A dimensionally heat recoverable tubular article (1) is made by spirally wrapping cross-linked polymeric sheet (3) a number of times, and directly fusing together overlapping layers (5) of the cross-linked sheet (3) to form a consolidated tubular article. The final article has a wall thickness of at least 2.2 mm. Articles according to the invention may be made of different diameter and different wall thickness, starting from the same thickness initial sheet material, simply by changing the circumference of wrapping or the number of spiral wraps. Articles according to the invention are particularly useful as casings over joints between district heating pipes.

Cette invention concerne un article tubulaire (1) de dimensions thermorétractables, lequel est obtenu en enroulant un certain nombre de fois des spirales d'un voile polymère réticulé (3), et en fusionnant directement entre elles les couches se chevauchant (5) du voile polymère réticulé (3), de manière à former un article tubulaire consolidé. L'article final possède des parois d'un épaisseur d'au moins 2,2 mm. Les articles fabriqués d'après cette invention peuvent avoir des diamètres différents ainsi que des parois d'épaisseurs différentes, en partant d'une feuille de matériau initiale ayant la même épaisseur, ceci en modifiant simplement la circonférence de l'enroulement ou le nombre de spires d'enroulement. Les articles fabriqués d'après cette invention sont particulièrement utiles en qualité de revêtement pour joints entre tuyaux de chauffage urbain.

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