Pipe insulation with adhesive closure

Details Pipe insulation with adhesive closure Pipe insulation with adhesive closure

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 59/02 (2006.01) B29C 63/00 (2006.01) B29C 65/00 (2006.01) B29C 69/00 (2006.01) B29D 23/00 (2006.01)

Patent

CA 2177353

A method for applying a closing tape to an extruded foam article is disclosed. The tape (40) is applied immediately after the article is extruded and while the article is still subject to shrinkage, which is common with extruded foamed products. The tape is prestressed and is of a material to alleviate the problems associated with shrinkage. This method is particularly appropriate for applying a closing tape to an extruded polyethylene pipe insulation (2) product which has been longitudinally slit to allow the pipe to be located interior to the insulation. The tape has one side attached to one side of the slit (9) with the other portion of the tape being positioned for closing the slit by engaging the opposite side of the slit. A pressure sensitive adhesive is provied on the tape and a release liner protects the adhesive on the other portion of the tape.

On décrit un procédé qui permet d'appliquer un ruban d'obturation sur un article extrudé en mousse. Le ruban (40) est appliqué juste après l'extrusion de l'article alors que celui-ci est encore sujet à rétraction, ce qui est courant pour les produits extrudés en mousse. Ce ruban est précontraint et son matériau lui permet d'atténuer les problèmes découlant de la contraction. Ce procédé convient particulièrement pour appliquer un ruban d'obturation sur un isolant (2) de tuyau réalisé en polyéthylène extrudé qui est fendu sur sa longueur pour enserrer ce tuyau. Ce ruban présente un côté fixé sur un côté de la fente (9), l'autre partie du ruban étant placée de façon à refermer cette fente en entrant en prise avec l'autre côté de celle-ci. Un adhésif sensible à la pression est disposé sur le ruban et une garniture amovible protège cet adhésif sur cette autre partie de ruban.

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