US 11,850,820 B2
Apertured nonwoven
Xiaoxin Liu, Beijing (CN); Li Tang, Beijing (CN); Kun Sun, Beijing (CN); Fancheng Wang, Beijing (CN); and Meng Chen, Beijing (CN)
Assigned to The Procter and Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Apr. 15, 2021, as Appl. No. 17/231,132.
Prior Publication US 2021/0324554 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 3/24 (2006.01); A61F 13/511 (2006.01); A61F 13/512 (2006.01); A61F 13/514 (2006.01); D04H 1/425 (2012.01); D04H 1/492 (2012.01); B32B 3/26 (2006.01); D04H 13/00 (2006.01); B26F 1/24 (2006.01); D04H 3/10 (2012.01)
CPC B32B 3/266 (2013.01) [A61F 13/512 (2013.01); A61F 13/5123 (2013.01); A61F 13/5125 (2013.01); A61F 13/5126 (2013.01); B26F 1/24 (2013.01); D04H 1/425 (2013.01); D04H 1/492 (2013.01); D04H 3/10 (2013.01); D04H 13/001 (2013.01); A61F 13/5146 (2013.01); A61F 13/51121 (2013.01); A61F 2013/5127 (2013.01); A61F 2013/51143 (2013.01); A61F 2013/51178 (2013.01); A61F 2013/51452 (2013.01); B32B 2262/062 (2013.01); B32B 2262/065 (2013.01); B32B 2262/08 (2013.01); B32B 2555/02 (2013.01); D10B 2401/022 (2013.01); Y10T 428/24273 (2015.01); Y10T 428/24322 (2015.01); Y10T 428/24331 (2015.01); Y10T 428/27 (2015.01)] 19 Claims
OG exemplary drawing
 
1. A nonwoven comprising:
a first nonwoven layer comprising cellulose-based fibers, wherein the first nonwoven layer comprises a plurality of apertures, the plurality of apertures formed by mechanically aperturing at least one moisturized area having a water content of at least about 20% by weight of the nonwoven in the moisturized area, prior to aperturing, and a plurality of apertures, wherein the plurality apertures have a minimum aperture distance between two adjacent apertures which has a relative standard deviation no greater than about 40%, wherein the apertures have an aperture size no greater than about 2.2 mm2, the aperture size having a relative standard deviation no greater than about 60%, and wherein the apertures have an occlusion no greater than about 9%,
wherein a mean of shortest distances, the shortest distance being between an aperture's centroid and the centroid of its nearest neighboring aperture and above 1 mm, is calculated as the minimum aperture distance and the standard deviation of the shortest distances divided by the mean and multiplied by 100 is the relative standard deviation;
wherein a mean of aperture areas is calculated as aperture size and the standard deviation of the aperture areas divided by the mean and multiplied by 100 is the relative standard deviation; and wherein a total area of stray fibers within apertures divided by a total area of apertures and multiplied by 100 is the percent occlusion, provided that apertures with sizes below 0.10 mm2 and incomplete openings are excluded.