Lydall, Inc.

Eastman Chemical Company

James M Posa

Koushik Ghosh

Mounir Izallalen

Scott Gregory Gaynor

Jeremy Kenneth Steach

Syed Ali Shah

Michael P McCarthy

Jason Michael Spruell

Guo Wei Qin

Yancey Appling

A high efficiency particulate air (HEPA) filter made from a layer of electrostatically-charged thermoplastic fiber scrim that is point-bonded to a layer of glass fiber batting to form a composite layer defining an area, wherein the point-bonding is distributed over substantially all of the area of the composite layer and the bond points constitute approximately 1% to approximately 6% of the total surface area of the welded filter material, and wherein the composite layer is substantially uncompressed. Also, a process for forming the filter by providing an ultrasonic rotary drum having a large number of projections from the surface of the drum, passing a layer of electrostatically-charged thermoplastic fiber scrim resting on top of a layer of glass fiber batting over said drum in such a manner that said projections do not substantially penetrate into the subassembly, and passing the subassembly resting on top of the projections under an ultrasonic horn emitting high frequency sound waves into the subassembly to form point-bonds in the vicinity of the projections.

Unitary multi-component filter media

Growing community of inventors

North Hampton, NH, United States of America

James M Posa