Fibrous structures and methods for making same

Patent metadata

Field	Value
Publication number	US-9458573-B2
Application number	US-91754710-A
Country	US
Kind code	B2
Filing date	Nov 2, 2010
Priority date	Nov 2, 2009
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Fibrous structures that exhibit a pore volume distribution such that at least 25% and/or at least 43% of the total pore volume present in the fibrous structures exists in pores of radii of from 91 μm to 140 μm, and to methods for making such fibrous structures are provided.

First claim

What is claimed is:

1. A fibrous structure comprising a calendered fibrous structure ply comprising a plurality of filaments and a plurality of solid additives that are randomly dispersed throughout the fibrous structure ply, wherein the fibrous structure ply exhibits a pore volume distribution such that at least 25% of the total pore volume present in the fibrous structure ply exists in pores of radii of from 91 μm to 120 μm.

2. The fibrous structure according to claim 1 wherein the fibrous structure ply exhibits a pore volume distribution such that at least 43% of the total pore volume present in the fibrous structure ply exists in pores of radii of from 91 μm to 140 μm.

3. The fibrous structure according to claim 1 wherein at least one of the solid additives comprises a fiber.

4. The fibrous structure according to claim 3 wherein the fiber comprises a wood pulp fiber.

5. The fibrous structure according to claim 4 wherein the wood pulp fiber is selected from the group consisting of: Southern Softwood Kraft pulp fibers, Northern Softwood Kraft pulp fibers, Eucalyptus pulp fibers, Acacia pulp fibers.

6. The fibrous structure according to claim 1 wherein at least one of the plurality of filaments comprises a thermoplastic polymer.

7. The fibrous structure according to claim 6 wherein the thermoplastic polymer is selected from the group consisting of: polypropylene, polyethylene, polyester, polylactic acid, polyhydroxyalkanoate, polyvinyl alcohol, polycaprolactone and mixtures thereof.

8. The fibrous structure according to claim 1 wherein at least one of the filaments comprises a natural polymer.

9. The fibrous structure according to claim 8 wherein the natural polymer is selected from the group consisting of: starch, starch derivatives, cellulose, cellulose derivatives, hemicellulose, hemicellulose derivatives and mixtures thereof.

10. The fibrous structure according to claim 1 wherein at least one surface of the fibrous structure comprises a layer of filaments.

11. The fibrous structure according to claim 1 wherein the fibrous structure comprises at least a bi-modal pore volume distribution.

12. The fibrous structure according to claim 11 wherein at least 2% of the total pore volume present in the fibrous structure ply exists in pores of radii of less than about 100 μm.

13. The fibrous structure according to claim 12 wherein at least 2% of the total pore volume present in the fibrous structure ply exists in pores of radii of less than about 80 μm.

14. The fibrous structure according to claim 13 wherein at least 2% of the total pore volume present in the fibrous structure ply exists in pores of radii of less than about 50 μm.

15. The fibrous structure according to claim 1 wherein the fibrous structure exhibits a VFS of at least 5 g/g.

16. The fibrous structure according to claim 1 wherein the fibrous structure is convolutedly wound upon itself in the form of a roll.

17. A sanitary tissue product comprising a fibrous structure according to claim 1 .

18. The sanitary tissue product according to claim 17 wherein the sanitary tissue product is selected from the group consisting of: paper towels, bath tissue, facial tissue, napkins, baby wipes, adult wipes, wet wipes, cleaning wipes, polishing wipes, cosmetic wipes, car care wipes, wipes that comprise an active agent for performing a particular function, cleaning substrates for use with implements and mixtures thereof.

Assignees

• Barnholtz Steven Lee
• Trokhan Paul Dennis
• Barkey Douglas Jay
• Young Christopher Michael
• Suer Michael Donald
• Procter & Gamble

Inventors

• Barnholtz Steven Lee
• Trokhan Paul Dennis
• Barkey Douglas Jay
• Young Christopher Michael
• Suer Michael Donald

Classifications

• D21H17/34

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D04H1/407

  containing absorbing substances, e.g. activated carbon · CPC title

• D21H11/04

  Kraft or sulfate pulp · CPC title

• Y10T428/24479

  including variation in thickness · CPC title

• D21H27/004 Primary

  characterised by specific parameters (D21H27/008 takes precedence) · CPC title