Sanitary Tissue Products with Superior Machine Direction Elongation and Foreshortening Properties and Methods for Making Same

• US 20150176221A1
• Filed: 12/18/2014
• Published: 06/25/2015
• Est. Priority Date: 12/19/2013
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Maladen, Ryan Dominic, Manifold, John Allen, Ostendorf, Ward William, Sheehan, Jeffrey Glen, Barkey, Douglas Jay
• Granted Patent: US 9,315,946 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: D21H 11/04 Kraft or sulfate pulp
• CPC Class Codes: D21H 21/20 Wet strength agents
• CPC Class Codes: D21H 27/005 relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
• CPC Class Codes: D21H 27/30 Multi-ply for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00
• CPC Class Codes: D21H 27/40 at least one of the sheets being non-planar, e.g. crêped crêping or corrugating paper B31F

Abstract

Fibrous structures and/or sanitary tissue products comprising fibrous structure, and more particularly to fibrous structures comprising pulp fibers, wherein the fibrous structures exhibit unique elongation (stretch) and total foreshortening properties, and methods for making such fibrous structures.

Claims

1. A fibrous structure comprising a plurality of pulp fibers, wherein the fibrous structure is void of a continuous knuckle and wherein the fibrous structure exhibits a MD elongation to total foreshortening ratio of greater than 2.25 as measured according to the Elongation Test Method.

2. The fibrous structure according to claim 1 wherein the fibrous structure exhibits differential density.

3. The fibrous structure according to claim 2 wherein the fibrous structure exhibits low density pillow regions and high density knuckle regions.

4. The fibrous structure according to claim 2 wherein the fibrous structure exhibits high density knuckle regions present in a continuous network pattern and low density pillow regions present as discrete regions.

5. The fibrous structure according to claim 2 wherein the fibrous structure exhibits high density knuckle regions present in a semi-continuous pattern and low density pillow regions present in a semi-continuous pattern.

6. The fibrous structure according to claim 5 wherein a plurality of the high density knuckle regions are oriented substantially in the cross-machine direction.

7. The fibrous structure according to claim 5 wherein a plurality of the high density knuckle regions comprise curvilinear lines.

8. The fibrous structure according to claim 5 wherein a plurality of the high density knuckle regions comprise sinusoidal lines.

9. A single- or multi-ply sanitary tissue product comprising the fibrous structure according to claim 1.

10. A fibrous structure comprising a plurality of pulp fibers, wherein the fibrous structure comprises a pattern of semi-continuous high density knuckle regions and a pattern of semi-continuous low density pillow regions, wherein the fibrous structure exhibits a MD elongation to total foreshortening ratio of greater than 2.25 as measured according to the Elongation Test Method.

11. The fibrous structure according to claim 10 wherein a plurality of the high density knuckle regions are oriented substantially in the cross-machine direction.

12. The fibrous structure according to claim 11 wherein a plurality of the high density knuckle regions comprise curvilinear lines.

13. The fibrous structure according to claim 11 wherein a plurality of the high density knuckle regions comprise sinusoidal lines.

14. A single- or multi-ply sanitary tissue product comprising the fibrous structure according to claim 10.

15. A fibrous structure comprising a plurality of pulp fibers and having a process induced foreshortening of 0% or greater imparted to the fibrous structure, exhibits a MD elongation to total foreshortening ratio of greater than 2.5 as measured according to the Elongation Test Method.

16. The fibrous structure according to claim 15 wherein the fibrous structure exhibits differential density.

17. The fibrous structure according to claim 16 wherein the fibrous structure exhibits low density pillow regions and high density knuckle regions.

18. The fibrous structure according to claim 16 wherein the fibrous structure exhibits high density knuckle regions present in a continuous network pattern and low density pillow regions present as discrete regions.

19. The fibrous structure according to claim 16 wherein the fibrous structure exhibits high density knuckle regions present in a semi-continuous pattern and low density pillow regions present in a semi-continuous pattern.

20. A single- or multi-ply sanitary tissue product comprising the fibrous structure according to claim 15.