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Comment Processing & Handling

A fine filter

By Gerald Ondrey |

Last month, W. L. Gore & Associates (Gore; Elkton, Md.; www.gore.com) introduced what is claimed to be the worlds first 20-nm-rated polytetrafluoroethylene (PTFE) filter that is available in a high-density polyethylene (HDPE) cartridge. Compared to conventional filtration media, this new PTFE membrane technology provides a significantly increased open-porous area available for fluid flow, and the structural characteristics of the membrane provide a high level of retention, says Gore. The new PTFE/HDFE filter cartridges are optimized for the bulk processing of high-purity chemicals used in the fabrication of semiconductors and flat panel displays, and are now available in three retention ratings: 100, 30 and 20 nm.
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