Tissue products having high durability and a deep discontinuous pocket structure

• US 20050236122A1
• Filed: 06/22/2005
• Published: 10/27/2005
• Est. Priority Date: 12/23/2003
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Hermans, Michael Alan, Mullally, Cristina Asensio
• Granted Patent: US 7,300,543 B2
• Time in Patent Office: Days
• US Class Current: 162/109
• CPC Class Codes: D21F 11/006 Making patterned paper
• CPC Class Codes: D21F 11/14 Making cellulose wadding, filter or blotting paper
• CPC Class Codes: D21F 11/145 including a through-drying process
• CPC Class Codes: D21H 27/00 Special paper not otherwise provided for, e.g. made by multi-step processes
• CPC Class Codes: D21H 27/002 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 Class Codes: Y10S 162/902 Woven fabric for papermaking drier section
• CPC Class Codes: Y10T 428/24479 including variation in thickness
• CPC Class Codes: Y10T 442/30 Woven fabric [i.e., woven strand or strip material]
• CPC Class Codes: Y10T 442/3089 Cross-sectional configuration of strand material is specified
• CPC Class Codes: Y10T 442/3179 Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
• CPC Class Codes: Y10T 442/322 Warp differs from weft

Abstract

A tissue sheet having a deep discontinuous pocket structure provides improved durability as measured by the ratio of the cross-machine direction tensile energy absorbed to the cross-machine direction tensile strength.

Claims

1. A tissue sheet having a deep discontinuous pocket structure, said tissue sheet having a CD TEA/CD tensile strength ratio of about 0.070 or greater.

2. The tissue sheet of claim 1 wherein the CD TEA/CD tensile strength ratio is from about 0.070 to about 0.100.

3. The tissue sheet of claim 1 wherein the CD TEA/CD tensile strength ratio is from about 0.070 to about 0.090.

4. The tissue sheet of claim 1 wherein the CD TEA/CD tensile strength ratio is from about 0.075 to about 0.085.

5. The tissue sheet of claim 1 having a CD slope/CD tensile strength ratio of about 0.007 or greater.

6. The tissue sheet of claim 1 having a CD slope/CD tensile strength ratio of from about 0.007 to about 0.015.

7. The tissue sheet of claim 1 having a CD slope/CD tensile strength ratio of from about 0.007 to about 0.011.

8. The tissue sheet of claim 1 having a CD slope/CD tensile strength ratio of from about 0.009 to about 0.011.

9. The tissue sheet of claim 1 having a bulk of about 23 cubic centimeters or greater per gram.

10. The tissue sheet of claim 1 having a bulk of from about 23 to about 40 cubic centimeters per gram.

11. The tissue sheet of claim 1 having a bulk of from about 25 to about 30 cubic centimeters per gram.

12. The tissue sheet of claim 1 having a Pinhole Coverage Index of about 0.25 or less.

13. The tissue sheet of claim 1 having a Pinhole Count Index of about 65 or less.

14. The tissue sheet of claim 1 having a Pinhole Size Index of about 600 or less.

15. A woven papermaking fabric having a deep discontinuous pocket structure.

16. The fabric of claim 15 wherein the depth of the pockets is from about 0.5 to about 8 millimeters.

17. The fabric of claim 15 wherein the depth of the pockets is from about 0.5 to about 5.5 millimeters.

18. The fabric of claim 15 wherein the depth of the pockets is from about 1.0 to about 5.5 millimeters.

19. The fabric of claim 15 wherein the pockets have an opening having a length and width of from about 5 to about 20 millimeters.

20. The fabric of claim 15 wherein the pockets have an opening having a length and width of from about 10 to about 15 millimeters.

22. The fabric of claim 15 which is shute dominant.

23. The fabric of claim 15 which is coplanar.

24. The fabric of claim 15 wherein the pockets are offset with respect to each other when the fabric is viewed in the machine direction.

25. The fabric of claim 15 wherein the depth of the pockets is from about 250 to about 525 percent of the warp strand diameter.

21. The fabric of clam 15 having from about 0.8 to about 3.6 pockets per square centimeter.

26. A method of making a tissue sheet comprising:

(a) depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web;

(b) dewatering the web to a consistency of about 20 percent or greater;

(c) transferring the dewatered web to a transfer fabric having a deep discontinuous pocket structure, whereby the web is conformed to the surface contour of the transfer fabric;

(d) transferring the web to a throughdrying fabric having a deep discontinuous pocket structure; and

(e) throughdrying the web.

27. A method of making a tissue sheet comprising:

(a) depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web;

(b) dewatering the web to a consistency of about 20 percent or greater;

(c) transferring the web to a throughdrying fabric having a deep discontinuous pocket structure, whereby the web is conformed to the surface contour of the throughdrying fabric; and

(d) throughdrying the web.

28. A method of making a tissue sheet comprising:

(a) depositing an aqueous suspension of papermaking fibers onto a forming fabric to form a wet web;

(b) dewatering the web to a consistency of about 20 percent or greater;

(c) transferring the dewatered web to a transfer fabric having a deep discontinuous pocket structure, whereby the web is conformed to the surface contour of the transfer fabric;

(d) transferring the web to a throughdrying fabric; and

(e) throughdrying the web.