Apparatus and method for lining landfills, reservoirs, hazardous waste disposal sites and the like
AssigneeGundle Lining Construction Corporation
InventorsMichael C. Mathieson, Mark W. Cadwallader
Life of this patent
Estimating the term…
Abstract
An improved method and a product for waterproofing soil utilizing a flexible plastic sheet for providing a water barrier and for providing a means of reflecting light sufficient to prevent damage to the sheet and the underlying soil from direct sunlight comprising a uniform density or multiple-density plastic sheet material which has been manufactured to a desired thickness to contain an upper surface cpable of reflecting light.
Claims42
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, said upper surface being light reflective, said liner being adapted to sufficiently reflect incident radiation, reduce exposed liner temperature, and prevent adverse effects due to solar heating.
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, said upper surface being light reflective, said liner being adapted to sufficiently reflect incident radiation, reduce exposed liner temperature, and prevent adverse effects due to solar heating, wherein said upper surface of said liner is pigmented with white pigment.
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, said upper surface being light reflective, said liner being adapted to sufficiently relect incident radiation, reduce exposed liner temperature, and prevent adverse effects due to solar heating, wherein said upper surface of said liner is pigmented with a pigment having a coefficient of reflection between 0.5 and 1.0.
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, said upper surface being light reflective, said liner being adapted to sufficiently reflect incident radiation, reduce exposed liner temperature, and prevent adverse effects due to solar heating, wherein said upper surface of said liner contains an ultraviolet light stabilizer employing a hindered amine.
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, said upper surface being light reflective and roughened, said liner being adapted to sufficiently reflect incident radiation, reduce exposed liner temperature, and prevent adverse effects due to solar heating.
A thermoplastic liner for outdoor fluid containment areas having a bottom and sidewalls comprising an inclined portion covering the sidewalls of said containment area and a planar portion covering the bottom of said containment area, said thermoplastic liner having an upper surface and a lower surface in contact with said containment area, wherein said thermoplastic liner is constructed of a multi-density composite, comprising an upper layer of polyethylene forming said upper surface and having a density equal to or greater than 0.93 grams/cm.sup.3, a central core layer of polyethylene integrally bonded underneath said upper layer and having a density equal to or less than 0.92 grams/cm.sup.3, and a lower layer of polyethylene forming said lower surface and being integrally bonded underneath said central core layer.
A method for waterproofing an area of soil comprising the steps of:
- (a) forming a flexible plastic sheet including a means for reflecting light sufficiently to prevent damage to said sheet and soil from solar heating and ultraviolet and incident radiation comprising a plastic sheet material containing an upper surface capable of reflecting light and an underside surface;
- (b) covering the soil to be waterproofed with a plurality of said flexible plastic sheets with said upper surface facing up;
- (c) aligning said sheets in an abutting fashion to create a seam region between adjoining sheets;
- and
- (d) permanently joining said abutting sheets to provide a continuous and uninterrupted barrier of plastic facing the area from which water is to be barred.
Dependencies are inferred from the claim text.