Evonik, the specialty chemicals giant, has introduced a new generation of polyimide fibers in the market to accommodate the increasing demands of the industry. The newly launched product is positioned under the brand name P84® HT and promises enhanced mechanical stability and flexibility at continually high operating temperatures. The new polyimide fiber builds on the company’s thirty-years-long tradition of developing and producing high-performance polymer-based fibers for applications in the hot gas filtration market at the company’s sites located in Lenzing/Schörfling sites in Austria.
The new fibers have a unique multi-lobal cross-section and the largest surface area currently available in the industry, which gives them the highest filtration efficiency. With their exceptional chemical properties, the polyimide fibers can be employed in wide-ranging applications. These applications range from filter media for high-temperature filtration, and protective clothing and sealing materials for space vehicles, to numerous high-temperature applications like thermal insulation. Another facet that gives it a competitive edge lies in its superior textile properties at high operating temperatures. The new fiber has an excellent capacity for retaining its flexibility, as compared to other materials, even at high temperatures like 280°C. Consequently, it has significant stability in applications where the temperature is relatively higher and undergoes numerous temperature spikes. A standardized bending test concludes that the new P84® HT fiber is equipped with nearly double the flexibility compared to that of standard materials.
In hot gas filtration applications, the new filter media can maintain marginally higher permeability through the entire life cycle. Based on the application, this could lower the release of waste gases, fine dust, and reduce the total cost of ownership of the plant. The Group, headquartered in Essen, North Rhine-Westphalia, Germany, is a leading producer of thermally stable, chemically resistant, and non-flammable polyimide fibers, which it produces at its chemical production facilities located in Lenzing and Schörfling am Attersee, Austria.