Lining material for pipe lines
AssigneeAshimori Kogyo Kabushiki Kaisha
InventorsMasakatsu Hyodo, Isaburo Yagi
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Abstract
The present invention relates to a lining material suitable for reinforcing various pipe lines buried in the ground, which is made by inserting an unwoven fabric of a specific structure into the interior of a conventional air-impervious tubular fabric having a film of a synthetic resin on the exterior surface thereof and is passed through a pipe line while being evaginated under fluid pressure and which possesses earthquake-resistance and shape-maintaining property against external hydraulic pressure in addition to the characteristics required for conventional lining materials.
Claims8
A lining material for pipe lines which is utilizable in a pipe-lining method wherein a tubular lining material with a binder on the inner surface thereof is inserted into the pipe lines and is allowed to advance within the pipe lines while evaginating the tubular lining material under fluid pressure thereby pressing the tubular lining material against the inner surface of the pipe lines and bonding the lining material onto the inner surface of the pipe lines with the binder being interposed between the lining material and the pipe lines, characterized in that the lining material comprises an air-impervious tubular fabric woven in a tubular form having a film of a synthetic resin on the exterior surface thereof and a tubular fabric to be impregnated with the binder which is comprised of an unwoven fabric having been provided almost uniformly with open holes formed by punching and inserted inside the air-impervious tubular fabric.
Dependencies are inferred from the claim text.