B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 88/34 (2006.01) B29D 7/01 (2006.01) B32B 5/18 (2006.01) B32B 27/32 (2006.01) B32B 33/00 (2006.01) B65D 88/42 (2006.01) B65D 90/54 (2006.01) C02F 3/00 (2006.01)
Patent
CA 2503256
The membrane structure according to the present invention has a top layer containing three plies. The top ply has UV stabilizers embedded therein; the bottom ply has stretch-resistant elements embedded therein; and the middle ply contains a co-extruded polyvinylidene chloride barrier film for example, for protecting the top ply against bio-gas infiltrations therein. In another aspect, the top and bottom plies containing polyethylene for protecting the middle ply from the weather and from corrosive environments under the membrane cover. In yet another aspect, the membrane structure has two foam layers affixed to the bottom ply. Each foam layer is made of juxtaposed strips of semi-rigid, closed-cell, polyethylene foam; wherein each strip in one foam layer is laid astride the adjoining edges of a pair of strips in the other foam layer. The strips of foam are bonded together and to the undersurface of the bottom ply by strips of fused polyethylene.
Degarie Claude J.
Nappert Sylvain
Degarie Claude J.
Geomembrane Technologies Inc.
Mario D. Theriault & Company
Nappert Sylvain
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