Nonwoven horizontal drainage system

Details Nonwoven horizontal drainage system Nonwoven horizontal drainage system

1972-12-04

1977-04-26

Gilliam, Paul R.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210491, E02B 1100

Patent

active

040193268

ABSTRACT:
A horizontal soil drainage system consisting of a nonwoven three-dimensional mat of a plurality of looped, intersecting and substantially amorphous filaments of melt-spun synthetic polymers bonded together at their intersections, at least one of the outer surfaces of said mat having a lower cross-sectional porosity than the center zone of said mat.

REFERENCES:
patent: 3264828 (1966-08-01), Marpold
patent: 3384241 (1968-05-01), Nostrand
patent: 3461675 (1969-08-01), Izatt
patent: 3670506 (1972-06-01), Gaudard
patent: 3691004 (1972-09-01), Werner et al.
patent: 3744256 (1973-07-01), Cobb et al.
patent: 3754362 (1973-08-01), Daimler et al.
patent: 3759393 (1973-09-01), Tate et al.

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