Abstract: Fiber structures and methods are described that incorporate a body of a micron fiber modified by the attachment of discrete length nano-fibers. Numerous of these modified fiber structures can be assembled into air filter media. Further augmentations of the modified fibers and media can be implemented to improve filtration characteristics.

Abstract: Fiber structures and methods are described that incorporate a body of a micron fiber modified by the attachment of discrete length, crimped nano-fibers. Numerous of these modified fiber structures can be assembled into air filter media. Further augmentations of the modified fibers and media can be implemented to improve filtration characteristics.

Abstract: Fiber structures and methods are described that incorporate a body of a micron fiber modified by the attachment of discrete length, crimped nano-fibers. Numerous of these modified fiber structures can be assembled into air filter media. Further augmentations of the modified fibers and media can be implemented to improve filtration characteristics.

Abstract: Various embodiments disclose filtration apparatuses and processes for filtering particles from a particle-laden air stream. In one embodiment, a filter is provided with a front face layer, in which at least one impaction nozzle is formed, is to accelerate an air stream onto an interior substrate to capture large particle sizes with a calculated fractional efficiency. The interior substrate is formed within the filter. The filter further includes a rear face layer in which at least one opening is formed to exhaust the air stream. A filter media material may be placed between the front face layer and rear face layer. Other apparatuses and processes are disclosed as well.

Abstract: Various embodiments comprise apparatuses and methods for capturing particles from a particle-laden airstream. An embodiment of a device includes an inlet air passage to direct a particle-laden airstream, an outlet air passage, an impaction nozzle in fluid communication with and downstream of the inlet air passage, and a channel in fluid communication with and downstream of the impaction nozzle and upstream of the outlet air passage. An open portion of the channel is oriented substantially toward the inlet air passage and has a cavity at least partially covered with a substrate material. A base of the substrate material is substantially normal to an incoming direction of the particle-laden airstream. Other embodiments of the device and a method of using the device are also provided.