A liner for reinforcing a pipe and method of making the same

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 55/165 (2006.01)

Patent

CA 2417057

A reinforcement liner and methods of manufacturing the liner are disclosed. The liner includes a fabric (100) material having first and second support layers (110, 120). Each of the layers includes reinforcing fibers (112, 122). The first and second support layers are oriented in different directions to provide support to the liner in those directions. The liner includes a stitching material (130) that is used to couple the first and second support layers together. The stitching material is preferably an elastic yarn. One of the support layers includes long, chopped strands that are oriented parallel to each other. The long, chopped strands are directed so that they are in the peripheral direction of the finished reinforcement liner. The long, chopped fibers can be distributed continuously or only along portions of the width of the fabric. The disclosed methods of manufacturing a liner include alternative processes by which the liner can be made. The fabric is manufactured in the form of a continuous roll (160). One method involves winding the roll in a helical pattern about a fixed mandrel (42). Another method involves mounting several rolls circumferentially about a mandrel. The rolls are mounted so that strips of fabric from each roll overlap a portion of adjacent fabric strips to provide a continuous liner surface on the mandrel.

La présente invention concerne un revêtement de renfort et des procédés de fabrication de ce revêtement. Le revêtement comprend un matériau textile (100) comportant des première et deuxième couches de support (110, 120). Chaque couche renferme des fibres de renforcement (112, 122). Les première et deuxième couches de support sont orientées dans des directions différentes pour supporter le revêtement dans ces mêmes directions. Le revêtement comprend un matériau (130) de liaison qui sert à coupler ensemble les première et deuxième couches de support. Le matériau de liaison est de préférence un fil élastique. Une des couches de support comprend des brins longs coupés qui sont orientés parallèlement les uns aux autres. Les brins longs coupés sont orientés de manière à se trouver dans le sens périphérique du revêtement de renfort fini. Les brins longs coupés peuvent être répartis de manière continue ou uniquement sur des parties de la largeur du textile. Les procédés de fabrication d'un revêtement selon l'invention comprennent des procédés équivalents permettant de réaliser le revêtement. Le textile est produit sous forme d'un rouleau continu (160). Un procédé consiste à enrouler le rouleau de manière hélicoïdale autour d'un mandrin fixe (42). Un autre procédé consiste à monter plusieurs rouleaux circonférentiellement autour d'un mandrin. Les rouleaux sont montés de sorte que des bandes de textile provenant de chaque rouleau recouvrent une partie des bandes adjacentes de textile pour former une surface de revêtement continue sur le mandrin.

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