Abstract: A method of producing a blown film with a controlled thickness profile, comprises the steps of: extruding molten plastic through an annular extrusion die; cooling the molten plastic using an annular blower around the extrusion die, positioning one or more sources of supplemental air at one or more desired circumferential positions about the annular extrusion die and adjacent to the extruded molten plastic, the annular blower and the one or more sources of supplemental air being operated to supply cooling air to the molten plastic between the annular extrusion die and the frost line where the molten plastic solidifies; and controlling the one or more sources of supplemental air to form one or more areas of increased thickness along a circumferential thickness profile of the blown film, the one or more areas of increased thickness having a thickness that is greater than an average thickness of the circumferential profile.

Abstract: A conductive geotextile for use in a leak detection system is disclosed. The conductive geotextile has a flexible substrate with a first face and a second face and a polymer layer laminated to the substrate. The polymer layer may be equal to or less than 0.006 inches thick and has a first face and a second face, with the second face adjacent to the first face of the substrate. The polymer layer has a conductive thin film coextruded onto a core, with the conductive film being at the first face of the polymer layer. The conductive thin film may be equal to or less than 0.003 inches thick and has a surface resistivity equal to or less than 4000 ohm per square.

Abstract: A biodegradable, flexible laminate film is provided, which is made up of a first substrate and a second substrate laminated to the first substrate. Each substrate is made from a polymer-based material that is biodegradable in an anaerobic, microbial environment over a period of more than 100 years and an additive that reduces the period of biodegradability of the polymer-based material to less than 40 years.

Abstract: A floating cover for a body of water has a flexible, impermeable substrate with a bottom face and a top face opposite the bottom face. The substrate is secured laterally across the surface of the body of water while being permitted to move vertically as the level of the body of water changes. A float is affixed to the bottom face of the substrate and a structure is rigidly mounted above the float. The structure extends above the top face of the substrate. The substrate is sealed between the float and the structure. The buoyant force of the float acts against the weight of the structure to maintain the substrate immediately adjacent to the float above the top surface of the body of water so as not to interfere with precipitation drainage.

Abstract: A fluid fillable structure has a reservoir body comprising a top surface and at least one fluid fill port at a first end. There is a first connector on the top surface of the reservoir body adjacent to the first end and a second connector spaced from the first end, the first end of the reservoir body being folded back onto the reservoir body and secured by releaseably securing the first connector to the second connector such that the at least one fluid fill port remains open.

Abstract: A fluid fillable structure has a reservoir body comprising a top surface and at least one fluid fill port at a first end. There is a first connector on the top surface of the reservoir body adjacent to the first end and a second connector spaced from the first end, the first end of the reservoir body being folded back onto the reservoir body and secured by releasably securing the first connector to the second connector such that the at least one fluid fill port remains open.