Fibrous structures
Fibrous structures containing a mixture of three or more different fibrous elements (filaments and/or fibers) are provided.
1. A non-wet-laid layered fibrous structure comprising at least three layers, wherein the fibrous structure comprises:
a. a first layer comprising a non-thermoplastic first fibrous element comprising a hydroxyl polymer selected from the group consisting of: polyvinyl alcohol, polyvinyl alcohol derivatives, and mixtures thereof, wherein the first fibrous element exhibits a length of 10.16 cm or greater and a length to average diameter ratio of greater than 2000, wherein the first fibrous element is a first monocomponent filament;
b. a second fibrous element different from the first fibrous element, wherein the second fibrous element exhibits a length of less than 5.08 cm, wherein the second fibrous element is a wood pulp fiber; and
c. a third layer comprising a third fibrous element different from the first and second fibrous elements, wherein the third fibrous element comprising a hydroxyl polymer selected from the group consisting of: starch, starch derivatives, and mixtures thereof, wherein the third fibrous element exhibits a length of 10.16 cm or greater and a length to average diameter ratio of greater than 2000, wherein the third fibrous element is a second monocomponent filament.
2. The non-wet-laid layered fibrous structure according to claim 1 wherein the hydroxyl polymer of the first fibrous element exhibits a weight average molecular weight of greater than about 10,000 g/mol.
3. The non-wet-laid layered fibrous structure according to claim 1 wherein the first fibrous element exhibits an average diameter of less than 25 μm.
4. The non-wet-laid layered fibrous structure according to claim 1 wherein the first fibrous element exhibits an average diameter of less than 25 μm to greater than 1 μm.
5. The non-wet-laid layered fibrous structure according to claim 1 wherein the hydroxyl polymer of the third fibrous element exhibits a weight average molecular weight of greater than about 10,000 g/mol.
6. The non-wet-laid layered fibrous structure according to claim 5 wherein the hydroxyl polymer of the third fibrous element exhibits a weight average molecular weight of greater than about 100,000 g/mol.
7. The non-wet-laid layered fibrous structure according to claim 1 wherein the hydroxyl polymer of the third fibrous element exhibits a weight average molecular weight of from about 10,000 g/mol to about 40,000,000 g/mol.
8. The non-wet-laid layered fibrous structure according to claim 1 wherein the third fibrous element exhibits an average diameter of less than 25 μm.
9. The non-wet-laid layered fibrous structure according to claim 8 wherein the third fibrous element exhibits an average diameter of less than 10 μm.
10. The non-wet-laid layered fibrous structure according to claim 1 wherein the third fibrous element exhibits an average diameter of less than 25 μm to greater than 1 μm.
11. A non-wet-laid layered fibrous structure comprising at least three layers, wherein the fibrous structure comprises:
a. a first layer comprising a non-thermoplastic, non-cellulose-containing, first fibrous element comprising a starch filament that exhibits a length of 10.16 cm or greater;
b. a second layer comprising a second fibrous element different from the first fibrous element, wherein the second fibrous element exhibits a length of less than 5.08 cm, wherein the second fibrous element is a wood pulp fiber; and
c. a third layer comprising a third fibrous element different from the first and second fibrous elements, wherein the third fibrous element comprising a polyvinyl alcohol filament.
12. The non-wet-laid layered fibrous structure according to claim 11 wherein the starch filament comprises a starch that exhibits a weight average molecular weight of greater than about 10,000 g/mol.
13. The non-wet-laid layered fibrous structure according to claim 12 wherein the starch filament comprises a starch that exhibits a weight average molecular weight of greater than about 100,000 g/mol.
14. The non-wet-laid layered fibrous structure according to claim 11 wherein the starch filament comprises a starch that exhibits a weight average molecular weight of greater than about 10,000 g/mol to about 40,000,000 g/mol.
15. The non-wet-laid layered fibrous structure according to claim 11 wherein the starch filament exhibits an average diameter of less than 25 μm.
16. The non-wet-laid layered fibrous structure according to claim 15 wherein the starch filament exhibits an average diameter of less than 10 μm.
17. The non-wet-laid layered fibrous structure according to claim 11 wherein the starch filament exhibits an average diameter of less than 25 μm to greater than 1 μm.
18. The non-wet-laid layered fibrous structure according to claim 11 wherein the polyvinyl alcohol filament comprises a polyvinyl alcohol that exhibits a weight average molecular weight of greater than about 10,000 g/mol.
19. The non-wet-laid layered fibrous structure according to claim 11 wherein the polyvinyl alcohol filament exhibits an average diameter of less than 25 μm.
20. The non-wet-laid layered fibrous structure according to claim 11 wherein the polyvinyl alcohol filament exhibits an average diameter of less than 25 μm to greater than 1 μm.