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Donaldson Company is a worldwide manufacturer of expanded ePTFE membranes called Tetratex®, and sub-micron polymeric nanofiber materials that we market under the names Ultra-Web® and Spider-Web®.
Tetratex® membranes are fabricated in a variety of proprietary pore structures, widths, thickness and lengths, providing flexibility to meet your needs. The diversity of our products enables us to solve tough problems in a variety of markets including, Industrial Filtration, Pharmaceutical, Microfiltration, Fuel Cell, Venting and Medical.
Donaldson nanofibers are created from a proprietary electrospinning process that results in fiber diameters less than 0.5 microns (less than 500 nanometers). The typical fiber diameter is 200 to 500 times smaller than a human hair. While we’ve used nanofibers to provide filtration solutions for a quarter of a century, we are now seeking other applications for this nano technology.
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Nanofibers
Donaldson develops nanofiber products and nanofiber filter media for applications where sub-micron fiber diameters, high filtration efficiency, high surface area and other unique material properties are useful. For many years, Donaldson has used its patented and patent-pending nanofiber filter media in Ultra-Web® filters for dust collection, Spider-Web® filters for gas turbine air filtration, and Donaldson EnduranceTM air filters for heavy-duty engines.
Now, our proprietary nanofiber technology is available for new applications so customers in other markets can also benefit from the technology.
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Tetratex® Release
Tetratex® Release is a high value surface filtration ePTFE membrane, laminated onto a variety of substrates for pulse jet baghouse applications. It acts as a primary dustcake requiring no pre-coat before or during operation. Delivering added value performance and excellent dust cake release compared to coated filter media.
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Tetratex®
Tetratex® high performance ePTFE membrane delivers high particulate capture rates and excellent dust cake release.
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Tetratex® High Efficiency
Tetratex® High Efficiency ePTFE membrane delivers exceptional particulate capture rates and excellent dust cake release providing outstanding durability.
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Selecting the Substrate
The process equipment and conditions will determine the selection of the most suitable substrate for the application of Tetratex Filter Media and the following points must be considered.
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Technical Products
The Tetratex Technical Products consist of hydrophobic ePTFE membranes with pore sizes ranging from 0.05 micron up to 7.0 micron and thicknesses of 0.2 mils up to 10 mils. The ePTFE membranes are available as films only and as thermobonded or laminated materials, consisting of Tetratex ePTFE membranes bonded to spunbond polyester, polypropylene and polyethylene substrates. These products can be used in Air and Liquid Microfiltration, Medical, Venting, Fuel Cells and many other applications. Oleophobic ePTFE membrane materials are also available for resistance to oils in the application, while allowing gases to pass through.
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