Planar drainage and impact protection material
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United States of America Patent
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-
Jul 14, 1998
Issued Date -
N/A
app pub date -
Aug 20, 1996
filing date -
Nov 4, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite sheet material for use as a planar drain and a protection board. The sheet material has a multi-layer construction formed into a composite by needling. The multi-layer construction preferably has a layer of a soft nonwoven fabric material sandwiched between outer layers of a stiffened fabric material. The composite material may be configured into relatively narrow longitudinal strips for use as a wicking drain. Such longitudinal strips may often have a width of approximately three (3) inches or less in exemplary constructions.
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Cited Art Landscape
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