US 12,458,915 B2
Transparent composite nano-fibre based multi-layer textile
Davide Barana, Winterthur (CH); Giuseppino Fortunato, St. Gallen (CH); Anne Géraldine Guex, St. Gallen (CH); René Rossi, Wil (CH); Thierry Pelet, Wollerau (CH); Klaus Schönenberger, Vufflens-la-Ville (CH); Sacha Sidjanski, Geneva (CH); and Diane Baatard, Wollerau (CH)
Assigned to EMPA EIDGENÖSSISCHE MATERIALPRÜFUNGS- UND FORSCHUNGSANSTALT, Dübendorf (CH); and ECOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL), Lausanne (CH)
Appl. No. 17/913,354
Filed by EMPA EIDGENÖSSISCHE MATERIALPRÜFUNGS- UND FORSCHUNGSANSTALT, Dübendorf (CH); and ECOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE (EPFL), Lausanne (CH)
PCT Filed Mar. 18, 2021, PCT No. PCT/EP2021/056902
§ 371(c)(1), (2) Date Sep. 21, 2022,
PCT Pub. No. WO2021/191037, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20164999 (EP), filed on Mar. 23, 2020.
Prior Publication US 2023/0114145 A1, Apr. 13, 2023
Int. Cl. B01D 39/16 (2006.01); B01D 39/08 (2006.01); B32B 3/26 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 7/05 (2019.01); B32B 27/12 (2006.01); D01D 5/00 (2006.01); D04H 1/4334 (2012.01); D04H 1/4382 (2012.01); D04H 1/558 (2012.01); D04H 1/728 (2012.01); A62B 23/02 (2006.01)
CPC B01D 39/163 (2013.01) [B01D 39/083 (2013.01); B01D 39/1692 (2013.01); B32B 3/266 (2013.01); B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 5/266 (2021.05); B32B 5/275 (2021.05); B32B 7/05 (2019.01); B32B 27/12 (2013.01); D01D 5/0076 (2013.01); D01D 5/0084 (2013.01); D04H 1/4334 (2013.01); D04H 1/43838 (2020.05); D04H 1/558 (2013.01); D04H 1/728 (2013.01); A62B 23/025 (2013.01); B01D 2239/025 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0631 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/0668 (2013.01); B01D 2239/10 (2013.01); B01D 2239/1233 (2013.01); B01D 2239/1291 (2013.01); B32B 2250/20 (2013.01); B32B 2250/40 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/0292 (2013.01); B32B 2262/08 (2013.01); B32B 2262/16 (2021.05); B32B 2307/412 (2013.01); B32B 2307/724 (2013.01); B32B 2307/732 (2013.01); B32B 2535/00 (2013.01); B32B 2571/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A composite multi-layer textile, comprising at least one nanofibre layer with nanofibres with diameters below 100 nm and at least one support layer with microfibres with diameters below five microns,
wherein the layers were produced by an electrospinning process and the multi-layer textile shows an overall transmittance at λ=555 nm greater than 50%,
wherein the at least one nanofibre layer and the at least one support layer are fused, forming solid domains in the multi-layer textile, at closed areas of a pattern used in the production process,
wherein the solid domains are separated from each other or connected, showing defined shapes, with regular or irregular spatial distribution, while the fibre morphologies of the nanofibres of the at least one nanofibre layer and the microfibres of the at least one support layer are preserved beside the solid domains, attaining an overall transmittance of the entire multi-layer textile greater than the transmittance given by the sum of the individual layers' transmittances.