Water and/or oil-permeable sealing mat consisting substantially

Details Water and/or oil-permeable sealing mat consisting substantially Water and/or oil-permeable sealing mat consisting substantially

1991-03-06

1993-06-22

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428220, 428234, 428240, 428241, 428283, 428300, 428332, 405 38, 405107, 405109, 405115, B32B 702, B32B 502, B32B 516, E02B 1100

Patent

active

052215687

ABSTRACT:
A water and/or oil-impermeable sealing mat is provided in form of a bentonite non-woven fabric combination with the possibility of transmitting shear from one batt layer to the other, i.e. on a slope shearing forces can be transmitted by the covering batt material through the layer of swellable clay into the supporting batt material. Such a sealing mat is a fiber-reinforced mineral seal permitting the transmission of shearing forces on slopes, without the risk of the layer of swellable clay itself becoming the preferred sliding plane. The sealing mat consists of a non-woven textile material as substrate layer, a layer of swellable clay, preferably sodium bentonite, and a cover layer consisting preferably also of a non-woven textile material, all three layers having been needlepunched together in the conventional manner in a needle loom. When moistened, the clay swells and forms the water and/or oil-impermeable layer. The water and/or oil-impermeable sealing mat is used especially in hydraulic engineering and in waste disposel engineering.

REFERENCES:
patent: 2277286 (1942-03-01), Bechtner
patent: 4048373 (1977-09-01), Clem
patent: 4070839 (1978-01-01), Clem
patent: 4129588 (1979-02-01), Clem
patent: 4344722 (1982-08-01), Blais
patent: 4424248 (1984-01-01), Tesch et al.
patent: 4501788 (1985-02-01), Clem
patent: 4565468 (1986-01-01), Crawford
patent: 5041330 (1991-08-01), Heerten et al.

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