Fiber reinforced cured in place liner for lining an existing conduit and method of manufacture
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jun 19, 2003
app pub date -
Dec 13, 2001
filing date -
Dec 13, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A longitudinally reinforced liner for cured in place pipe rehabilitation of an existing pipeline having a plurality of high-strength low-elongation fiber bundles disposed between resin impregnable layers of the liner is provided. The bundles of reinforcing fibers are continuous lengths of reinforcing fibers laid out adjacent to each other and parallel onto about one-half of the middle region of the upper surface of the outer resin impregnable layer. An inner resin impregnable layer formed into a tube is laid up against the outer layer and the reinforcing fiber bundles and a plurality of bundles of reinforcing fibers are laid out along the exposed surface of the flattened inner layer. The edges of the outer layer are wrapped around the inner layer and bundles of reinforcing fibers and the secured to form an outer tubular layer with the reinforcing strands remaining in position between the two layers. The resin absorbable layers are formed into tubes by any convenient means, such as sewing, flame bonding, or adhesively joined. The increase in longitudinal strength allows pulling-in of extremely long lengths of liner and substantially reduces or eliminates stretch of the resin impregnated liner during pull-in.
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