Abstract:
A blend of bonding polyester with an acid resistant polyester and heat dispersant filler providing a liner especially suitable for concrete structure subjected to acidic environments. The blend can also be used in combination with aggregate or fibers to be extruded or molded into articles which are substitutes for conventional concrete.
Abstract:
A method of forming a polymer concrete CNG tank by forming an inflatable liner member composed of high density polymer impermeable to CNG; providing column forms as part of the liner member, the column forms having open tops and open bottoms and extending completely through the liner member; providing an outer form; positioning the liner member within the outer form with the column forms vertically oriented, the liner member being positioned to provide a gap between the liner member and the outer form; inflating the liner member; pouring polymer concrete about the liner member and through the column forms; and allowing the polymer concrete to cure. Reinforcement members may be positioned around the liner member and within the column forms prior to the step of pouring the polymer concrete.
Abstract:
A compressed natural gas storage and dispensing system having descending pressure bulk storage banks in fluid communication with a supply source for CNG and dispensing storage banks in fluid communication with the descending pressure bulk storage bank, both banks being in fluid communication with fuel dispensers, wherein the delivery pressure of the CNG during, simultaneous refueling of CNG powered vehicles is equalized.
Abstract:
A polymer blend concrete CNG tank comprising a liner member composed of a high density polymer, the tank being preferably disposed within a concrete vault.
Abstract:
A compressed natural gas storage and dispensing system having bulk storage tanks in fluid communication with a natural gas supply source; a compressor to produce compressed natural gas; dispensing storage tanks in fluid communication with the bulk storage tanks and in fluid communication with fuel dispensers; a liquified natural gas storage tank in fluid communication with the bulk storage tanks, wherein compressed natural gas resulting from vaporization of the liquified natural gas within the liquified natural gas storage tank is transferred to the bulk storage tanks as a supplemental source of compressed natural gas, or wherein liquified natural gas is vaporized in an ambient vaporizer and delivered to the bulk or dispensing storage tanks.
Abstract:
Contaminated brownfields are successfully and efficiently remediated by the sequential synchronized treatment of the native groundwater in the contaminated site, both mechanically and biologically, in a closed-loop system.The mechanical treatment comprises a high-intensity air sparger, and the biological treatment comprises a bacterial incubator initially filled with untreated (dirty) groundwater, the bacterial growth preferably being facilitated by a sample of the native bacteria in the site and/or is supplied with non-native bacteria.
Abstract:
Oxygen-scavenging polymers and packaging for holding oxygen-sensitive products. A heat treatment process has been found to significantly increase the oxygen-scavenging performance of the polymer. The enhanced scavenging polymer can be effectively incorporated into various packaging, including transparent multilayer containers for beer and juice. In one embodiment, a multilayer package made from the scavenger provides an actual reduction in oxygen content of a contents of the package, over a long period of time (e.g., 24 weeks). The package can be stored unfilled for an extended period (without significant loss of scavenging capability) and will scavenge substantially immediately upon filling with a liquid product. The package may incorporate a relatively low weight percentage of the scavenger, thus providing enhanced scavenging in a cost-effective manner.
Abstract:
Apparatus and method for making a molded plastic article having a stretched and crystallized neck finish. In one embodiment, a series of platforms are carried by a conveying apparatus for transporting a series of molded plastic articles along a predetermined path of travel through one or more treatment stations. At a finish widening station, the molded article, having a relatively wide and thin-walled blow-molded body portion, and a relatively narrow and thick-walled unexpanded neck finish portion, is positioned to enable insertion of a mandrel into an open top aperture of the finish portion to widen the finish. The mandrel may include a lower heated tapered portion for expanding the finish, and an upper cooled body portion on which the expanded finish may be cooled. The article may then be sent to a finish crystallizing station having a heating device that heats the widened finish portion for a time and temperature selected to crystallize at least a portion of the widened finish. A sizing mechanism positionable in the widened finish supports the finish during crystallization.
Abstract:
Apparatus and method for making a molded plastic article having a stretched and crystallized neck finish. In one embodiment, a series of platforms are carried by a conveying apparatus for transporting a series of molded plastic articles along a predetermined path of travel through one or more treatment stations. At a finish widening station, the molded article, having a relatively wide and thin-walled blow-molded body portion, and a relatively narrow and thick-walled unexpanded neck finish portion, is positioned to enable insertion of a mandrel into an open top aperture of the finish portion to widen the finish. The mandrel may include a lower heated tapered portion for expanding the finish, and an upper cooled body portion on which the expanded finish may be cooled. The article may then be sent to a finish crystallizing station having a heating device that heats the widened finish portion for a time and temperature selected to crystallize at least a portion of the widened finish. A sizing mechanism positionable in the widened finish supports the finish during crystallization.
Abstract:
A finish on a hollow plastic preform or container includes a neck that is at least partially of crystallizable polymer construction and is at least partially crystallized, and a finish ring externally secured over the neck. The neck preferably is of molded plastic construction, and preferably is stretched subsequent to molding but prior to external securement of the finish ring. In the preferred embodiments of the invention, the preform or container has an integral body, and the neck is integrally molded with the body. The finish ring preferably has at least one external thread for securement of a closure to the container after molding.