Layered fibrous structures
Layered fibrous structures, and more particularly layered fibrous structures containing two or more layers of fibrous elements, for example filaments, that exhibit different physical characteristics, such as different Elongation at Rupture values as measured according to the Elongation at Rupture Test Method described herein, and/or pilling, and/or dry lint scores, sanitary tissue products comprising such layered fibrous structures, and methods for making same.
1. A multi-ply fibrous structure comprising:
1) a first ply comprising a layered fibrous structure comprising:
a. a first layer comprising a plurality of first filaments comprising a first hydroxyl polymer comprising a polysaccharide;
b. a second layer comprising a plurality of second filaments comprising a second hydroxyl polymer comprising a non-polysaccharide; and
c. a first web material comprising a first wet laid fibrous structure, wherein the plurality of first filaments of the first layer are deposited directly onto the first wet laid fibrous structure and are positioned between the first wet laid fibrous structure and the second layer; and
2) a second ply comprising a second wet laid fibrous structure
wherein the first wet laid fibrous structure of the first ply is bonded to the second wet laid fibrous structure of the second ply.
2. The multi-ply fibrous structure according to claim 1 wherein the polysaccharide is selected from the group consisting of: cellulose, cellulose derivatives, starch, starch derivatives, hemicelluloses, hemicelluloses derivatives, and mixtures thereof.
3. The multi-ply fibrous structure according to claim 1 wherein the non-polysaccharide is a polyvinyl alcohol.
4. The multi-ply fibrous structure according to claim 1 wherein at least one of the first filaments exhibits an Elongation at Rupture that is less than the Elongation at Rupture of at least one of the second filaments as measured according to the Elongation at Rupture Test Method.
5. The multi-ply fibrous structure according to claim 1 wherein at least one of the first filaments exhibits an Elongation at Rupture of less than 40% as measured according to the Elongation at Rupture Test Method.
6. The multi-ply fibrous structure according to claim 1 wherein at least one of the second filaments exhibits an Elongation at Rupture of greater than 20% as measured according to the Elongation at Rupture Test Method.
7. The multi-ply fibrous structure according to claim 1 wherein the second layer is bonded to the first layer at a bond spacing of greater than 0.05 inches.
8. The multi-ply fibrous structure according to claim 1 wherein the first layer exhibits a basis weight of greater than 2 gsm.
9. The multi-ply fibrous structure according to claim 1 wherein the second layer exhibits a basis weight of at least 0.1 gsm.
10. The multi-ply fibrous structure according to claim 1 wherein the second layer exhibits a basis weight of from about 0.1 gsm to about 5 gsm.
11. The multi-ply fibrous structure according to claim 1 wherein the second layer exhibits a basis weight of at least 0.5 gsm and the second filaments comprise a polyvinyl alcohol that exhibits a weight average molecular weight of greater than 25,000 g/mol and exhibit a hydrolysis of greater than 95%.
12. The multi-ply fibrous structure according to claim 1 wherein the second layer exhibits a basis weight of at least 0.15 gsm and the second filaments comprise a polyvinyl alcohol that exhibits a weight average molecular weight of greater than 45,000 g/mol.
13. The multi-ply fibrous structure according to claim 1 wherein the first ply further comprises a third layer comprising a plurality of fibers.
14. The multi-ply fibrous structure according to claim 13 wherein the third layer exhibits a basis weight of greater than 10 gsm.
15. The multi-ply fibrous structure according to claim 1 wherein the first filaments exhibit an average diameter of greater than 0.5 μm to less than 20 μm as measured according to the Average Diameter Test Method.
16. The multi-ply fibrous structure according to claim 1 wherein the second filaments exhibit an average diameter of greater than 0.5 μm to less than 20 μm as measured according to the Average Diameter Test Method.
17. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure exhibits a Force Variability Value of less than 1.40 as measured according to the Glide on Skin Test Method.
18. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure exhibits a Force to Drag Value of less than 100 as measured according to the Glide on Skin Test Method.