Karl Küfner expands application possibilities for membrane filters

Filter fineness up to 0.15 microns for filtering bacteria

Several years ago, Karl Küfner, the specialist for filtration solutions, succeeded in overmolding membrane material with a plastic frame. This led to a significant reduction in the manufacturing costs of microfilters, as the time-consuming gluing process was no longer necessary. This made it possible to mass-produce filters with a fineness of up to 0.15 µm using injection molding, enabling the filtration of bacteria and fungi.

However, applications are not limited to medical technology, but also extend to all areas where moisture is a problem and ventilation is necessary. In addition, membrane material is also used in the production of hydrogen, as well as in the conversion of hydrogen into electrical energy. Other areas of application include water and wastewater treatment, the filtration of beverages and liquid foods, the treatment of process fluids, and much more.

However, one limiting factor is that not all plastics can be combined with the various membrane materials as desired. The combination options have now been expanded, however. For example, it is possible to use TPE as a overmolding material. This provides a sealing function in addition to the filter function.