Chan Cho

Title: Chan Cho and Flue Gas Filtration Media.

Introduction

Chan Cho is an inventor associated with Daegu, South Korea, and Ahlstrom Oyj. His patent work addresses filter media designed for flue gas filtration.

Latest Patents

Cho is credited with 1 patent, titled “Flue Gas Filtration Media.” The invention describes a non-woven fibrous web containing at least 80 weight percent meta-aramid fibers and 0.1 to 20 weight percent meta-aramid fibrids, based on the combined weight of the fibers and fibrids.

The web may have an average pore size of 20 to 80 micrometers and a maximum pore size of 100 micrometers. The disclosed performance characteristics include dry Mullen burst strength of at least 7 kg/cm, retention of 80 percent of that strength after acid cycling, filtration efficiency of at least 95 percent for 2.5-micrometer particles, and shrinkage below 2 percent after heating at 205°C for two hours.

The described manufacturing method wet-lays a furnish of meta-aramid fibers and fibrids, then dries it to form the web. The process may also include calendering, resin saturation, and curing.

Career Highlights

The available information connects Cho’s patent activity with Ahlstrom Oyj and highlights his contribution to filtration materials intended for demanding flue gas applications.

Collaborations

Jesse Shim and Taylor Lee are identified as Cho’s coworkers. The supplied information does not specify their roles in the patent or the development of the filter medium.

Conclusion

Chan Cho’s patent describes a meta-aramid-based filter medium and a manufacturing approach designed to combine filtration performance with strength and resistance to heat and acid cycling.