Plasma Processing Changing Filtration

P2i’s technology, by contrast, is low-energy, solvent-free and uses only tiny quantities of protective monomer, resulting in minimal waste and no adverse impact on the environment.

Plus, because the nanocoating is applied within a vacuum chamber, there is no release to the environment during processing and, since the nano-coating is molecularly bonded to the product, there is no wash off, leachables or extractables.

Components to Assemblies

In addition to enhancing filtration media, P2i’s technology is also equally effective at treating the often complex structures they are formed into. For example, filter media are generally manufactured in 2D form though rarely used in this format. The sections required are cut into the desired shapes and configured into elements contained in housings. These can be used to form a larger system in order for the filter element or system to perform the desired function. Because P2i’s protective polymer is formed in a gas plasma, it permeates every exposed surface of finished filter structures, meaning that the membrane may be treated while sealed in a permanent housing. It also means that the same chemistry can be imparted to a wider range of media, including surface and depth filter media, woven and nonwoven textiles, membranes and media combinations created to form a filter medium, element or system format. Other associated benefits are increased liquid protection and greater working efficiencies in harsh environments, which in turn translates into benefits such as longer filtration life, higher performance (in terms of reduced pressure drop and higher particle capture efficiency), and pleatability.

P2i’s technology can enhance the performance of a wide range of filter media and complete filtration systems.
P2i’s technology can enhance the performance of a wide range of filter media and complete filtration systems.

Cost-Effective

Increasing environmental concerns, demands for product cleanliness and the growing need for contaminant reduction in sectors such as electronics, and medical and biological industries means the market for filters is growing rapidly. P2i’s liquid repellent nano-coating technology allows reusable filtration products to perform at a much higher level in their intended application through increased oil and water repellency without affecting airflow, porosity or other crucial indicators, such as cake release. Furthermore, this multi-patented innovation is cost-effective and environmentally friendly for enhancing cheaper filter mediums, such as cellulose or nylon, without compromising performance. Both the wide variety of filter media and the complex structures involved make the P2i enhancement process highly sought after. The company is already working with some of the world’s leading filtration manufacturers and has been providing processed media into the market place for more than six years.

Stephen Coulson
Stephen Coulson

About the Author : Stephen Coulson, Ph.D., is the Chief Technical Officer of P2i. Mr. Coulson invented the P2i technology while carrying out his Ph.D. at Durham University on ‘Liquid repellent surfaces’. He was consequently employed by the MoD to set up a plasma capability and further scale-up the patented technology for industrial applications. In 2001, Mr. Coulson moved into project managing the UK Nuclear Biological and Chemical clothing program, but continued to exploit the plasma technology for a range of commercial applications. Mr. Coulson was the founding member of P2i when it was formed in January 2004 and has more than a decade’s experience in advanced material sciences and plasma processing.

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