Soft through air dried tissue

Patent metadata

Field	Value
Publication number	US-8968517-B2
Application number	US-201313837685-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Aug 3, 2012
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A multi-layer through air dried tissue including an interior layer having an ionic surfactant and a non-ionic surfactant, introduced as wet end additives.

First claim

What is claimed is:

1. A multi-layer through air dried tissue comprising;
a first exterior layer;
an interior layer; and
a second exterior layer,
wherein the interior layer includes:
a first wet end additive comprising an ionic surfactant; and
a second wet end additive comprising a non-ionic surfactant.

2. The tissue of claim 1 wherein the first exterior layer further comprises a wet end temporary wet strength additive.

3. The tissue of claim 2 wherein the wet end temporary wet strength additive comprises glyoxalated polyacrylamide.

4. The tissue of claim 2 wherein the first exterior layer further comprises a wet end dry strength additive.

5. The tissue of claim 4 wherein the wet end temporary wet strength additive comprises glyoxalated polyacrylamide and the wet end dry strength additive comprises amphoteric starch.

6. The tissue of claim 2 wherein the second exterior layer further comprises a temporary wet strength additive.

7. The tissue of claim 1 wherein the first exterior layer further comprises a wet end dry strength additive.

8. The tissue of claim 7 wherein the second exterior layer further comprises a wet end dry strength additive.

9. The tissue of claim 8 wherein the wet end dry strength additive comprises amphoteric starch.

10. The tissue of claim 7 wherein the wet end dry strength additive comprises amphoteric starch.

11. The tissue of claim 1 wherein the second wet end additive comprises an ethoxylated vegetable oil.

12. The tissue of claim 11 wherein the second wet end additive comprises a combination of ethoxylated vegetable oils.

13. The tissue of claim 1 wherein the ratio by weight of the second wet end additive to the first wet end additive in the tissue is at least eight to one.

14. The tissue of claim 13 wherein the ratio by weight of the second wet end additive to the first wet end additive in the first interior layer is at most ninety to one.

15. The tissue of claim 1 having a softness of at least 90.

16. The tissue of claim 1 having a bulk softness of less than 10 TS7.

17. The tissue of claim 1 wherein the ionic surfactant comprises a debonder.

18. The tissue of claim 1 having a tensile strength of at least 35 N/m, a softness of at least 90 and a basis weight of less than 25 gsm.

19. The tissue of claim 1 having a tensile strength of at least 35 N/m, a softness of at least 90 and a caliper of less than 650 microns.

20. The tissue of claim 1 wherein the first exterior layer further comprises a dry strength additive.

21. The tissue of claim 1 wherein the first and second exterior layers are substantially free of any surface deposited softener agents or lotions.

22. The tissue of claim 1 wherein at least one of the first or second exterior layers comprises a surface deposited softener agent or lotion.

23. The tissue of claim 1 having a softness of at least 95.

24. The tissue of claim 1 wherein the non-ionic surfactant has a hydrophilic-lipophilic balance of less than 10.

25. The tissue of claim 1 , wherein at least one of the first exterior layer or the second exterior layer forms an outer tissue surface with an Average Peak to Valley Waviness of 140 or less.

26. The tissue of claim 1 , wherein at least one of the first exterior layer or the second exterior layer forms an outer tissue surface with a Waviness Uniformity of 27 or less.

27. The tissue of claim 1 , wherein at least one of the first exterior layer or the second exterior layer forms an outer tissue surface with an Average Primary Amplitude of 50 or less.

28. The tissue of claim 1 , wherein at least one of the first exterior layer or the second exterior layer forms an outer tissue surface with an Amplitude Uniformity of 8 or less.

Assignees

• First Quality Tissue Llc

Inventors

• Ramaratnam Karthik
• Miller Iv Byrd Tyler
• Hayes Shane Ervin
• Sealey Ii James E

Classifications

• D21H21/20

  Wet strength agents · CPC title

• D21H27/008

  characterised by inhomogeneous distribution or incomplete coverage of properties, e.g. obtained by using materials of chemical compounds (D21H23/02, D21H23/76, D21H27/02 take precedence) · CPC title

• D21H27/38 Primary

  at least one of the sheets having a fibrous composition differing from that of other sheets · CPC title

• D21H21/18

  Reinforcing agents · CPC title

• D21H27/002

  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 title