Soft, low lint, through air dried tissue and method of forming the same
A multi-ply through air dried structured tissue having a bulk softness of less than 10 TS7 and a lint value of 5.0 or less. Each ply of the tissue has a first exterior layer that includes a wet end temporary wet strength additive in an amount of approximately 0.25 kg/ton and a wet end dry strength additive in an amount of approximately 0.25 kg/ton, an interior layer that includes a first wet end additive comprising an ionic surfactant, and a second wet end additive comprising a non-ionic surfactant, and a second exterior layer.
1. A method for forming tissue product comprising:
forming a structured tissue web on a papermaking machine;
transferring the structured tissue web to a drying drum with a hot air impingement hood blowing heated air onto the drying drum;
creping the structured tissue web off the drum with a creping blade to form tissue paper; and
laminating at least two plies of the tissue paper to form the tissue product, wherein the tissue product has a lint value of less than 5.5 and a bulk softness TS7 of 10 or less, and the tissue product is substantially free of any surface deposited softener agents or lotions.
2. The method of claim 1 , wherein the air is heated up to 450° C.
3. The method of claim 1 , further comprising the step of taking the tissue paper up on a reel drum, wherein a speed differential between the drying drum and the reel drum is 10 percent.
4. The method of claim 1 , wherein the tissue product has a softness value of 91.0 HF or greater.
5. The method of claim 1 , wherein the tissue paper comprises first and second exterior layers and an interior layer, and the exterior layers are substantially free of any surface deposited softener agents or lotions.
6. The method of claim 5 , wherein the first exterior layer comprises a wet end temporary wet strength additive in an amount of 0.25 kg/ton to 5 kg/ton and a wet end dry strength additive in an amount of 1 kg/ton to 40 kg/ton, and the interior layer comprises a first wet end additive comprising an ionic surfactant, and a second wet end additive comprising a non-ionic surfactant.
7. The method of claim 6 , wherein the first exterior layer further comprises at least 75% by weight hardwood fibers.
8. The method of claim 7 , wherein the first exterior layer further comprises at least 20% by weight of softwood fibers.
9. The method of claim 7 , where the interior layer further comprises at least 40% by weight softwood fibers.
10. The method of claim 6 , wherein the second wet end additive comprises one or more ethoxylated vegetable oils.
11. The method of claim 6 , wherein the ratio by weight of the second wet end additive to the first wet end additive in the interior layer of the tissue paper is at least eight to one.
12. The method of claim 6 , wherein the ratio by weight of the second wet end additive to the first wet end additive in the interior layer is at most ninety to one.
13. The method of claim 6 , wherein the ionic surfactant comprises a debonder.
14. The method of claim 6 , wherein the wet end temporary wet strength additive comprises glyoxalated polyacrylamide.
15. The method of claim 14 , wherein the wet end dry strength additive comprises amphoteric starch.
16. The method of claim 6 , wherein the second exterior layer comprises a wet end dry strength additive.
17. The method of claim 16 , wherein the wet end dry strength additive comprises amphoteric starch.
18. The method of claim 6 , wherein the interior layer is comprised of at least 75% by weight of softwood fibers.
19. The method of claim 6 , wherein the second exterior layer further comprises a wet end dry strength additive.
20. The method of claim 6 , wherein the second exterior layer further comprises a temporary wet strength additive.
21. The method of claim 6 , wherein the second exterior layer further comprises a dry strength additive.
22. The method of claim 6 , wherein the first exterior layer further comprises a dry strength additive.
23. The method of claim 6 , wherein the tissue product has an MD tensile strength and a CD tensile strength of at least 35 N/m and has a basis weight of less than 40 gsm.
24. The method of claim 6 , wherein the tissue product has an MD tensile strength and a CD tensile strength of at least 35 N/m and a caliper of less than 650 microns.
25. The method of claim 6 , wherein the non-ionic surfactant has a hydrophilic-lipophilic balance of less than 10.
26. The method of claim 6 , wherein each of the at least two plies comprise an embossed area, wherein the embossed area occupies between 3 to 15% of the total surface area of a surface of the ply.
27. The method of claim 1 , wherein the tissue product is one of a sanitary, bath or facial tissue product.
28. The method of claim 1 , wherein the tissue product has a caliper of at least 500 microns.
29. The method of claim 1 , wherein the tissue product has a caliper of 500 microns to 650 microns.