STRUCTURAL FABRIC USEFUL FOR LINING PIPE

摘要

A structural fabric suitable for lining pipes and pipes lined with the structural fabric. The fabric includes a strengthening layer laminated to a watertight layer. The strengthening layer may include carbon fiber bundles stitched to a watertight layer of woven glass fibers. In some embodiments, the strengthening layer includes lengthwise oriented carbon fiber bundles and widthwise oriented carbon fiber bundles bound together in a non-woven, non-crimp arrangement. The widthwise oriented bundles can have about three-times greater weight per unit area than the lengthwise oriented bundles. The watertight layer provides a watertight barrier when impregnated with the curable polymer, applied to the interior surface of the pipe, and cured. The watertight layer may include lengthwise and widthwise oriented bundles of glass fiber woven into one of a satin and twill weave.

主权项

1. A liner for lining an interior surface of a host pipe at least between two access points of the host pipe separated by a distance, the liner including first and second ends and a length extending from the first end to the second end, the length of the liner being at least as long as the distance between the access points of the host pipe to cover an interior surface of the host pipe in the longitudinal direction from one of the two access points to the other of the two access points when the liner is applied to the interior surface of the host pipe, the liner further having first and second longitudinal edges and a width extending from the first longitudinal edge to the second longitudinal edge, the width of the liner being at least as long as an interior hoop dimension of the host pipe to cover the interior surface of the host pipe in the hoop direction when the liner is applied to the interior surface of the host pipe, the liner comprising:
a strengthening layer including bundles of strengthening fiber extending lengthwise of the liner and bundles of strengthening fiber extending widthwise of the liner; a watertight layer comprising fibers spanning substantially continuously the length and the width of the liner, the fibers being arranged to be impregnated with a curable polymer and to provide a watertight barrier when the watertight layer is impregnated with the curable polymer, applied to the interior surface of the pipe, and cured, the watertight layer being laminated to the strengthening layer.