Non-woven needle-punched filter fabric
AssigneeThe Tensar Corporation
InventorsPeter Edward Stevenson, Jeffrey King
Life of this patent
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Abstract
A non-woven needle-punched filter fabric for use in a geocomposite having a filter face and a laminating face, the fabric having a first filter and cushion zone adjacent the filter face produced from spun bond, continuous filament, a second stiff and bend resistant zone adjacent the first zone produced from a blend of staple non-fusible fiber and staple fusible fiber, and a third zone at the laminating face produced from fiber from both the first and second zones whereby the third zone has a hairy characteristic which facilitates laminating the fabric to a drainage net or a geogrid.
Claims11
A geocomposite comprising an integral net structure and a non-woven needle-punched filter fabric, the fabric having a filter face and a laminating face, the fabric comprising a first filter and cushion zone adjacent the filter face produced from spun bond, continuous filament, a second stiff and bend resistant zone adjacent the first zone produced from a blend of staple non-fusible fiber and staple fusible fiber, and a third zone at the laminating face produced from fiber from both the first and second zones whereby the third zone has a hairy characteristic, the laminating face of the filter fabric being laminated to a face of the net structure.
Dependencies are inferred from the claim text.