Fibrous structures and methods for making same

Patent metadata

Field	Value
Publication number	US-11655573-B2
Application number	US-201313889415-A
Country	US
Kind code	B2
Filing date	May 8, 2013
Priority date	May 8, 2012
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

Novel fibrous structures that contain filaments, and optionally, solid additives, such as fibers, for example wood pulp fibers, sanitary tissue products comprising such fibrous structures, and methods for making such fibrous structures and/or sanitary tissue products are provided.

First claim

What is claimed is:

1. A multi-ply fibrous structure comprising a first fibrous structure ply and a second fibrous structure ply bonded together at one or more thermal bond points, wherein each of the first and second fibrous structure plies comprises two or more regions not present within the one or more thermal bond points, wherein the two or more regions exhibit different density values relative to one another, wherein the first and second fibrous structure plies comprise a plurality of filaments comprising a thermoplastic polymer selected from the group consisting of: polypropylene, polyethylene, polyester, polylactic acid, polyhydroxyalkanoate, polycaprolactone, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, poly-urethane, and mixtures thereof and a plurality of solid additives, wherein the multi-ply fibrous structure comprises one or more z-direction void volumes of at least 20 μm between the first and second fibrous structure plies.

2. The multi-ply fibrous structure according to claim 1 wherein the solid additives comprise a wood pulp fiber selected from the group consisting of: Southern Softwood Kraft pulp fibers, Northern Softwood Kraft pulp fibers, Eucalyptus pulp fibers, Acacia pulp fibers.

3. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure further comprises a polysaccharide filament.

4. The multi-ply fibrous structure according to claim 3 wherein the polysaccharide filament comprises a polysaccharide selected from the group consisting of: starch, starch derivatives, cellulose, cellulose derivatives, hemicellulose, hemicellulose derivatives and mixtures thereof.

5. The multi-ply fibrous structure according to claim 1 wherein at least one surface of the one or more first and second fibrous structure plies of the multi-ply fibrous structure consists of a layer of filaments.

6. The multi-ply fibrous structure according to claim 1 wherein at least one of the first and second fibrous structure plies of the multi-ply fibrous structure comprises a scrim material.

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

8. The multi-ply fibrous structure according to claim 1 wherein at least one of the first and second fibrous structure plies of the multi-ply fibrous structure comprises undulations.

9. The multi-ply fibrous structure according to claim 1 wherein at least one of the first and second fibrous structure plies of the multi-ply fibrous structure comprises a creped fibrous structure.

10. The multi-ply fibrous structure according to claim 1 wherein at least one ply of the multi-ply fibrous structure comprises an uncreped fibrous structure.

11. The multi-ply fibrous structure according to claim 1 wherein at least one of the first and second fibrous structure plies of the multi-ply fibrous structure comprises a foreshortened fibrous structure.

12. The multi-ply fibrous structure according to claim 1 wherein the filaments comprise microfilaments.

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

14. A sanitary tissue product comprising a multi-ply fibrous structure according to claim 1 .

15. The sanitary tissue product according to claim 14 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.

16. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure exhibits a pore volume distribution such that at least 2% to less than 40% of the total pore volume present in the multi-ply fibrous structure exists in pores of radii of from 91 μm to 140 μm as measured by the Pore Volume Distribution Test Method.

17. The multi-ply fibrous structure according to claim 1 wherein the non-thermal bond point comprises a z-direction void volume of at least 50 μm between the first and second fibrous structure plies.

18. The multi-ply fibrous structure according to claim 1 wherein the first and second fibrous structure plies exhibit a pore volume distribution such that greater than 8% of the total pore volume present in the fibrous structure ply exists in pores of radii of from 2.5 μm to 50 μm as measured by the Pore Volume Distribution Test Method.

Assignees

• Procter & Gamble

Inventors

• Barnholtz Steven Lee
• Suer Michael Donald
• Young Christopher Michael
• Trokhan Paul Dennis
• Schmidt Mattias

Classifications

• Y10T442/659

  Including an additional nonwoven fabric · CPC title

• D21H15/06

  Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments · CPC title

• Y10T442/184

  Nonwoven scrim · CPC title

• D21H27/005 Primary

  relating to physical or mechanical properties, e.g. tensile strength, stretch, softness · CPC title

• Y10T428/24694

  Parallel corrugations · CPC title