Fibrous structures and methods for making same
Fibrous structures having a surface pattern of a continuous knuckle region and a plurality of discrete pillow regions such that the fibrous structures exhibit improved softness compared to known fibrous structures and better sheet control during the making of such fibrous structures are provided.
1. A fibrous structure comprising a surface comprising a surface pattern, wherein the surface pattern comprises a continuous knuckle region network and a plurality of discrete pillow regions, each having a width, dispersed within the knuckle region network such that the fibrous structure is void of nubs and exhibits a TS7 of less than 5.5 dB V 2 rms as measured according to the Emtec Test Method, wherein a repeat unit of the surface pattern is defined by two or more groups of two or more pillow regions dispersed in the knuckle region network, wherein at least two of the two or more groups of pillow regions are non-parallelly juxtaposed;
wherein at least one of the pillow regions exhibits a pillow region perimeter to average knuckle region network width ratio of greater than 21 as measured according to a Micro-CT Intensive Property Measurement Test Method; and
wherein a discrete pillow region width exhibits a relative standard deviation of less than 25% as measured according to the Micro CT Intensive Property Measurement Test Method.
2. The fibrous structure according to claim 1 wherein at least two of the two or more pillow regions within one of the two or more groups are parallel to one another.
3. The fibrous structure according to claim 1 wherein at least two of two or more pillow regions within at least two of the two or more groups are oriented at an angle of about 90′.
4. The fibrous structure according to claim 1 wherein the at least two groups of pillow regions are oriented at an angle of greater than 20° to less than 85° to the fibrous structure's cross machine direction.
5. The fibrous structure according to claim 1 wherein at least one of the pillow regions exhibits an average pillow region length of greater than 2 mm as measured according to a Micro-CT Intensive Property Measurement Test Method.
6. The fibrous structure according to claim 1 wherein a plurality of the pillow regions exhibit average pillow region length of greater than 2 mm as measured according to a Micro-CT Intensive Property Measurement Test Method.
7. The fibrous structure according to claim 1 wherein at least one of the pillow regions exhibits an average pillow region length to average pillow region width ratio of at least 1.3 as measured according to a Micro-CT Intensive Property Measurement Test Method.
8. The fibrous structure according to claim 1 wherein at least one of the pillow regions exhibits a pillow region perimeter of greater than 12.7 mm as measured according to a Micro-CT Intensive Property Measurement Test Method.
9. The fibrous structure according to claim 1 wherein at least one of the pillow regions exhibits an average pillow region length to average knuckle region network width ratio of greater than 6.5 as measured according to a Micro-CT Intensive Property Measurement Test Method.
10. The fibrous structure according to claim 1 wherein the fibrous structure comprises a plurality of fibers.
11. The fibrous structure according to claim 10 wherein the plurality of fibers comprise a plurality of pulp fibers.
12. The fibrous structure according to claim 11 wherein the plurality of pulp fibers comprise a plurality of wood pulp fibers.
13. The fibrous structure according to claim 11 wherein the plurality of pulp fibers comprise non-wood pulp fibers.
14. The fibrous structure according to claim 1 wherein the fibrous structure comprises a structured fibrous structure.
15. The fibrous structure according to claim 14 wherein the structured fibrous structure comprises a through-air-dried fibrous structure ply.
16. The fibrous structure according to claim 1 wherein the surface pattern comprises a molded microscopical three-dimensional pattern.
17. A single- or multi-ply sanitary tissue product comprising a fibrous structure according to claim 1 .
18. A roll of sanitary tissue product comprising a single- or multi-ply sanitary tissue product according to claim 17 .
19. A package comprising one or more rolls of sanitary tissue product according to claim 18 .