| CPC D01D 5/0092 (2013.01) [B01D 67/00042 (2022.08); B05B 5/0536 (2013.01); B05B 5/082 (2013.01); B05B 5/14 (2013.01); B05C 19/025 (2013.01); B05D 3/0254 (2013.01); B32B 5/12 (2013.01); B32B 5/266 (2021.05); D01D 5/0084 (2013.01); D04H 1/413 (2013.01); D04H 3/02 (2013.01); B32B 2307/7163 (2013.01); B32B 2535/00 (2013.01)] | 12 Claims | 

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               1. A fiber membrane, comprising electrospun fiberizeable material in at least three adjacent layers of nanofibers, each layer comprising a plurality of aligned nanofibers oriented at oblique angles relative to nanofibers in adjacent layers, said plurality of aligned nanofibers in each layer extending from a first membrane edge to a second membrane edge, wherein a plurality of aligned nanofibers in each layer cross a plurality of aligned nanofibers in adjacent layers at a plurality of distinct points of intersection, forming a crossing at each distinct point of intersection consisting of three crossing nanofibers extending directionally as six radials from each of said distinct points of intersection, wherein relative cross-alignment angles between said six radials at each distinct point of intersection are in the range of 50 to 70 degrees, and wherein said relative cross-alignment angles of said aligned nanofibers and spacing between said aligned nanofibers each have a specific average numerical value in said membrane and comprise a structure having porosity required for cell migration and exudate flow from a wound, and wherein said aligned nanofibers comprise a polymer and any one or combination of a chromogenic agent, an antimicrobial agent, a hemostatic agent, an analgesic agent, a regenerative agent, an immune modulator, an oxygenating agent, and a pH stabilizer. 
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