Water and/or oil-impermeable sealing mat consisting substantiall

Details Water and/or oil-impermeable sealing mat consisting substantiall Water and/or oil-impermeable sealing mat consisting substantiall

1989-09-27

1991-08-20

Davis, Jenna

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 506, B32B 516, B32B 522, B32B 1906

Patent

active

050413309

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 thrust from one batt layer to the other, i.e. on a slope thrust 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 thrust 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 needled 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: 3186896 (1965-06-01), Clem
patent: 3630762 (1971-12-01), Olton et al.
patent: 4209568 (1980-06-01), Clem
patent: 4250172 (1981-02-01), Matzenberg et al.
patent: 4424248 (1984-01-01), Tesch et al.
patent: 4501788 (1985-02-01), Clem
patent: 4656062 (1987-04-01), Harriett

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