3M™ LifeASSURE™ PSN Series Filter Cartridges are highly retentive nylon membrane filter elements, utilizing 3M’s Advanced Pleat Technology (APT). 3M™ LifeASSURE PSN Series Filter Cartridges provide maximum flow rates with minimal pressure drop, maximizing throughput and lowering cost of ownership. The naturally hydrophilic Nylon 6,6 pleated membrane in an all high density polyeth¬ylene (HDPE) construction provides low extractable levels and supe¬rior reduction of gel and hard particles when compared to other membrane cartridges. 3M™ LifeASSURE™ PSN series filter cartridges are ideally suited for photoresist and ancillary chemical applications where high efficiency contaminant reduction at 0.04 μm, 0.1 μm or 0.2 μm is required. Advanced Pleat Technology Provides Maximum Gel Reduction A small amount of gel particles can normally be found in photoresists, which can form during manufacturing and storage. Reducing gels from photoresists is highly dependent on differential pressure across the filtration system. Since these gels are deformable, they can extrude through a filter at high differential pressures. Using filters that have low differential pressures helps retain the gels by the membrane media. At 3M SPSD, we have been able to effectively maximize filtration surface area, which provides both a low inlet pressure to the pump, and low differential pressure, which is ideal for gel reduction. The increase in filtration surface area is achieved by using our Advanced Pleat Technology. Naturally Hydrophilic Membrane and Superior ConstructionWe construct 3M™ LifeASSURE™ PSN filter cartridges with high efficiency, naturally hydrophilic, Nylon 6,6 membrane. This allows the filter to be used with no need to pre-wet with IPA and flush, which reduces chemical interaction and eliminates a potential source of contamination and reduces chemical usage. Another benefit our Nylon 6,6 membrane offers is a reduction for potential microbubble formation by not de-wetting in outgassing fluids unlike hydrophobic membranes such as polypropylene, UPE and PTFE.