Tufted geosynthetic clay liner and method of manufacture thereof
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United States of America Patent
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Jul 25, 1995
Grant Date -
N/A
app pub date -
Jan 19, 1993
filing date -
Jan 19, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A geosynthetic clay liner is disclosed for providing barriers in landfills that substantially preclude the migration of liquids. The geosynthetic clay liner includes a layer of bentonite disposed between a primary carrier sheet and a cover sheet. The primary carrier sheet and the cover sheet are linked via plurality of tufting threads. A bight or loop portion of the tufting thread extends through to the undersurface of the lower or primary carrier sheet and is partially melted to prevent the bight portion from slipping back through the primary carrier sheet. The partially melted bight portions create an under surface with a high coefficient of friction thereby enabling the geosynthetic clay liner to be installed on steep slopes or banks of landfills or ponds.
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