HDPE - A Hydrocarbon Resistant Membrane?


Courtesy of Industrial Textiles & Plastics Ltd.

Most brownfield redevelopment and environmental protection applications require the use of a hydrocarbon resistant membrane.  However, each membrane material will vary in its ability to resist chemical attack and its effectiveness as a barrier to permeation.  It is essential that a barrier material prevents the migration of contaminants, thereby not harming the surrounding environment or building occupants, as well as being durable when exposed to challenge chemicals.

To be an effective barrier, it is necessary for that barrier to not just maintain its physical integrity when exposed to chemicals, but to also perform as a barrier. Whilst chemical resistance tests provide a
measure of resilience, the measure of barrier performance is the permeation rate. This is where HDPE fails as a hydrocarbon resistant barrier because polyethylene and other common homogeneous geosynthetic membrane materials are readily permeable to hydrocarbons, because they are hydrocarbons themselves.

Puraflex has exceptional resistance to common hydrocarbon contaminants such as the BTEX (benzene, toluene, ethly benzene and xylene) chloroanilines, vinyl chloride, TCE.  Puraflex can also be used for common gases such methane CH4, carbon dioxide CO2 and radon as well as heavy metals, inorganics, pesticides and various acid and alkali contaminants.


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