Fibrous structures comprising regions having different solid additive levels

Patent metadata

Field	Value
Publication number	US-11786940-B2
Application number	US-202217832981-A
Country	US
Kind code	B2
Filing date	Jun 6, 2022
Priority date	Dec 15, 2015
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

Fibrous structures containing solid additives, and more particularly, fibrous structures containing two or more regions that comprise different average weight % levels of solid additives and methods for making same are provided.

First claim

What is claimed is:

1. A fibrous structure comprising a plurality of filaments and a plurality of solid additives present in the fibrous structure at a level of greater than 10% by weight of the fibrous structure on a dry basis, the fibrous structure further comprising:
(a) a first region, wherein the solid additives are present in the first region at a first average weight % as measured according to the TGA Test Method and wherein the first region exhibits a first micro-CT density as measured according to the Micro-CT Test Method; and
(b) a second region, wherein the solid additives are present in the second region at a second average weight % different from the first average weight % as measured according to the TGA Test Method and wherein the second region exhibits a second micro-CT density that is different from the first micro-CT density as measured according to the Micro-CT Test Method.

2. The fibrous structure according to claim 1 wherein the second region is dispersed throughout the first region.

3. The fibrous structure according to claim 1 wherein the first average weight % is from about 10% to about 90% as measured according to the TGA Test Method.

4. The fibrous structure according to claim 1 wherein the second average weight % is from about 10% to about 90% as measured according to the TGA Test Method.

5. The fibrous structure according to claim 1 wherein the ratio of the first average weight % to the second average weight % is greater than 1 as measured according to the TGA Test Method.

6. The fibrous structure according to claim 1 wherein the ratio of the first average weight % to the second average weight % is less than 1 as measured according to the TGA Test Method.

7. The fibrous structure according to claim 1 wherein the first average weight % and the second average weight % differ by at least 0.1 percentage units as measured according to the TGA Test Method.

8. The fibrous structure according to claim 1 wherein the first average weight % and the second average weight % differ by at least 0.1 but less than 40 percentage units as measured according to the TGA Test Method.

9. The fibrous structure according to claim 1 wherein the first average weight % and the second average weight % differ by at least 0.5 but less than 40 percentage units as measured according to the TGA Test Method.

10. The fibrous structure according to claim 1 wherein the filaments are present in the fibrous structure at a level of less than 90% by weight of the fibrous structure on a dry basis.

11. The fibrous structure according to claim 1 wherein the solid additives are present in the fibrous structure at a level of greater than 25% by weight of the fibrous structure on a dry basis.

12. The fibrous structure according to claim 1 wherein the filaments and solid additives are commingled together.

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

14. The fibrous structure according to claim 13 wherein the thermoplastic polymer is selected from the group consisting of: polyolefins, polyesters, polyhydroxyalkanoates, polyhydroxybutyrates, and mixtures thereof.

15. The fibrous structure according to claim 1 wherein the solid additives comprise fibers.

16. The fibrous structure according to claim 15 wherein the fibers comprise pulp fibers.

17. The fibrous structure according to claim 16 wherein the pulp fibers comprise wood pulp fibers.

18. The fibrous structure according to claim 1 wherein the first micro-CT density and the second micro-CT differ by greater than 0.0005 g/cm 3 as measured according to the Micro-CT Test Method.

19. The fibrous structure according to claim 1 wherein the first micro-CT density and the second micro-CT differ by greater than 0.0005 g/cm 3 as measured according to the Micro-CT Test Method and wherein the ratio of the micro-CT density value of the first region to the micro-CT density value of the second region is less than 1 as measured according to the Micro-CT Test Method.

20. The fibrous structure according to claim 1 wherein the first micro-CT density and the second micro-CT differ by greater than 0.0005 g/cm 3 as measured according to the Micro-CT Test Method and wherein the ratio of the micro-CT density value of the first region to the micro-CT density value of the second region is greater than 1 as measured according to the Micro-CT Test Method.

21. The fibrous structure according to claim 1 wherein the fibrous structure is a core component.

22. The fibrous structure according to claim 21 wherein the fibrous structure further comprises a scrim component.

23. The fibrous structure according to claim 1 wherein the fibrous structure comprises a liquid composition.

24. The fibrous structure according to claim 1 wherein the fibrous structure is a baby wipe.

Assignees

• Procter & Gamble

Inventors

• Wang Fei
• Suer Michael Donald
• Algers John Daniel
• Song Cunming
• Bao Hailing
• Debeer Antonius Lambertus
• Pung David John
• Barnholtz Steven Lee
• Weisman Paul Thomas

Classifications

• B08B1/006 Primary

  Operations & Transport · mapped topic

• A47K7/03

  containing soap or other cleaning ingredients, e.g. impregnated · CPC title

• A47L13/17

  containing cleaning agents (A47L13/19 takes precedence {; chemical compositions C11D17/049}) · CPC title

• D21H27/002 Primary

  Tissue paper; Absorbent paper (D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00) · CPC title

• D21H27/004

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