PES Membrane The LENGE PES membranes are highly asymmetric with a distinct uniform integral retention layer. The membranes have a high surface porosity and gradually increased pore size distribution in the direction facing upstream of filtration. Therefore, the membranes have a capability of retaining various sized particulates and microorganisms. All raw materials used for membrane production meet the pharmaceutical standards, regulations and requirements, the production lines were designed and manufactured by world-class membrane machine manufacturers. All the operating conditions and procedures were computer controlled so that the membranes produced have precisely controlled pore sizes, desired mechanical and filtration performance properties. Features and Benefits
Complies with United States Pharmacopeia (USP) Biological Reactivity Test, In Vivo for biosafety, cytotoxicity, and hemolysis testing. l For 0.22µm membrane, lot samples retain a minimum of 10E7 CFU/cm2 of Brevundimonas diminuta (ATCC19146) per modified ASTM F838, current revision. The optimized built-in highly asymmetric prefiltration layer for maximum flow and throughput performance. Hydrophilic membrane that wets out quickly and completely resulting in fast filtration with superior flow rates and high flux. Easily wet for reliable integrity testing. Very high compatibility over the whole pH range plus very low protein binding to ensure the maximum transmission of the active ingredients. Compatible with EtO, gamma irradiation, and SIP/autoclave methods of sterilization. ¬€¹Characteristics
· Highly asymmetric structure
· High mechanical strength
· Easily wet with water
· High porosity
· High flux
· Low protein binding and adsorption
· High dirt capacity
· Low extractables
· Low differential pressure
Application
Pharmaceutical Biotechnology Biotechnology Medical Food and beverage Microelectronics Fine chemicals 
