A LINER FOR REINFORCING A PIPE AND METHOD OF MAKING THE SAME

摘要

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 o f 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 th e peripheral direction of the finished reinforcement liner. The long, chopped fibers can be distributed continuously or only along portions of the width o f the fabric. The disclosed methods of manufacturing a liner include alternati ve 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 th at strips of fabric from each roll overlap a portion of adjacent fabric strips to provide a continuous liner surface on the mandrel.