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US 11,850,820 B2Granted
Apertured nonwoven
AssigneeThe Procter & Gamble Company
InventorsXiaoxin Liu, Li Tang, Kun Sun, Fancheng Wang, Meng Chen
Life of this patent
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Abstract
An apertured nonwovens having a first nonwoven layer is described. The first nonwoven layer includes cellulose-based fibers 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%, as measured according to the Aperture Quality Test. The apertures have an aperture size no greater than about 2.2 mm2 and have an occlusion no greater than about 9%, as measured according to the Aperture Quality Test, or the apertures have an aspect ratio no greater than about 2.5 as measured according to the Aspect Ratio Test.
Claims19
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.
1 more element
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, and wherein the apertures have an aspect ratio no greater than about 2.5, 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 mean of aperture aspect ratios is calculated as aspect ratio, provided that apertures with sizes below 0.10 mm2 and incomplete openings are excluded.
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 pin-hole aperturing at least one moisturizing 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 apertures have an aperture size no greater than about 2.2 mm2, wherein the plurality of apertures have a minimum aperture distance between two adjacent apertures which has a relative standard deviation no greater than about 40%, 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 the aperture size, provided that apertures with sizes below 0.10 mm2 and incomplete openings are excluded.
Dependencies are inferred from the claim text.