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Polyurea Geomembranes High Performance Seamless Liners

Polyurea Geomembranes High Performance Seamless Liners
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Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them.

Product Number: 41208-430-SG
Author: Robert M. Loomis
Publication Date: 2008
Industry: Coatings
$0.00
$20.00
$20.00

Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them. In this study, properties of polyurea geomembranes based on different geotextiles are reported and their unique characteristics are contrasted with traditional thermoplastic liners. Woven, nonwoven, and spunlaid geotextiles of different weights were used to create the polyurea geomembranes, which were mechanically tested in two orientations. In addition, mechanical properties of these polyurea geomembranes were evaluated according to methods for elastomeric coatings and compared to methods for coated fabrics. The peel adhesion between the polyurea coating and geotextile was measured for each polyurea geomembrane, which revealed an unexpected high result for a woven polypropylene geotextile. High-resolution images of the polyurea/geotextile interface showed how the individual components interact to form a geomembrane. The polyurea geomembranes exhibited low permeability to water, as well as greater tensile strength, puncture resistance, and tear resistance than traditional thermoplastic liners.

Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them. In this study, properties of polyurea geomembranes based on different geotextiles are reported and their unique characteristics are contrasted with traditional thermoplastic liners. Woven, nonwoven, and spunlaid geotextiles of different weights were used to create the polyurea geomembranes, which were mechanically tested in two orientations. In addition, mechanical properties of these polyurea geomembranes were evaluated according to methods for elastomeric coatings and compared to methods for coated fabrics. The peel adhesion between the polyurea coating and geotextile was measured for each polyurea geomembrane, which revealed an unexpected high result for a woven polypropylene geotextile. High-resolution images of the polyurea/geotextile interface showed how the individual components interact to form a geomembrane. The polyurea geomembranes exhibited low permeability to water, as well as greater tensile strength, puncture resistance, and tear resistance than traditional thermoplastic liners.

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Product Number: 41208-401-SG
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This paper will offer general guidance regarding preservation by liquid applied coatings to the owners and operators of coastal and inland working vessels. The paper will discuss both new construction and maintenance painting and will offer suggested coating systems for the main areas of these vessels.
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Powder Coating - Contract Metal Finishing; How to Avoid Premature Coating Failures

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Publication Date: 2008
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Every year millions of dollars are spent litigating the responsibility issues associated with the repair or replacement of coated products that have prematurely lost their decorative or protective value due to improper coating specification or application. Many of these failures could have been avoided if the proper finishing materials and methods were specified, followed, certified and documented.
Polyurea Geomembranes for Primary Containment over Concrete
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Polyurea Geomembranes for Primary Containment over Concrete

Product Number: 41208-429-SG
Author: Robert M. Loomis, Sean D. Boeger
Publication Date: 2008
$20.00

Application of conventional coatings directly to concrete tanks is a common practice for the primary containment of liquids. Substituting the application of polyurea geomembranes in lieu of conventional methods exhibits a significant reduction in application time with regard to certain surface rehabilitation, surface preparation, and priming of substrates. Polyurea geomembranes are high performance liners designed for various reasons that include, but are not limited to, protection of the environment from pollution and hazardous materials or protection of the lining’s contents from vessel contamination. 
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