Soft bath tissues having low wet abrasion and good durability
View Patent ↗A multi-ply bath tissue that is both soft and durable. The multi-ply bath tissue can include first and second plies, each of which includes two layers. A temporary wet strength resin is provided in the layers of the first and second plies that form the surfaces of the bath tissue. The bath tissue has an excellent combination of low wet abrasion and CD wet tensile, and softness that is demonstrably better than comparative products.
1. A multi-ply bath tissue comprising:
a first ply providing a first surface of the bath tissue, the first ply including first and second layers, the first layer of the first ply forming the first surface, the first layer of the first ply including a temporary wet strength resin and the second layer of the first ply being substantially free from a temporary wet strength resin; and
a second ply providing a second surface of the bath tissue, the second ply including first and second layers, the first layer of the second ply forming the second surface, the first layer of the second ply including a temporary wet strength resin and the second layer of the second ply being substantially free from a temporary wet strength resin.
2. The multi-ply bath tissue according to claim 1 , wherein the bath tissue includes northern softwood kraft fibers and eucalyptus fibers.
3. The multi-ply bath tissue according to claim 1 , wherein the bath tissue includes at least about 15% northern softwood kraft fibers.
4. The multi-ply bath tissue according to claim 2 , wherein the bath tissue includes at least about 25% northern softwood kraft fibers.
5. The multi-ply bath tissue according to claim 1 , wherein the bath tissue includes about 14% to about 40% northern softwood kraft fibers and about 60% to about 86% eucalyptus fibers.
6. The multi-ply bath tissue according to claim 1 , further comprising a third ply sandwiched between the first ply and the second ply.
7. The multi-ply bath tissue according to claim 6 , wherein the third ply includes southern hardwood fibers, southern softwood fibers, and recycled fibers.
8. The multi-ply bath tissue according to claim 6 , wherein the third ply includes only one layer and has temporary wet strength resin throughout the one layer.
9. The multi-ply bath tissue according to claim 6 , wherein the third ply has a lower CD wet tensile strength than that of each of the first ply and the second ply.
10. The multi-ply bath tissue according to claim 1 , wherein the bath tissue is free from cellulosic microfiber.
11. The multi-ply bath tissue according to claim 1 , wherein the bath tissue has a caliper of greater than about 130 mils/8 plies.
12. The multi-ply bath tissue according to claim 1 , wherein the bath tissue has a basis weight of about 30 lbs/ream to about 40 lbs/ream.
13. A multi-ply bath tissue comprising:
a first ply forming a first surface of the bath tissue; and
a second ply forming a second surface of the bath tissue,
wherein the bath tissue has a CD wet tensile strength of between about 50 grams to about 90 grams, and
wherein the bath tissue has a wet abraded lint area to CD wet tensile strength ratio of less than about 0.333 mm 2 /gram when the web abrasion lint area is determined according to the Wet Abrasion Lint Test.
14. The multi-ply bath tissue of claim 13 , wherein the bath tissue has a CD wet tensile strength of between about 55 grams to about 85 grams.
15. The multi-ply bath tissue of claim 14 , wherein the bath tissue has a CD wet tensile strength of between about 65 grams to about 75 grams.
16. The multi-ply bath tissue according to claim 13 , wherein the wet abrasion area to CD wet tensile strength ratio is about 0.333 mm 2 /gram to about 0.06 mm 2 /gram.
17. The multi-ply bath tissue according to claim 13 , wherein the bath tissue has a GM break modulus of less than about 60 gram/% strain.
18. The multi-ply bath tissue according to claim 13 , wherein the bath tissue includes northern softwood kraft fibers and eucalyptus fibers.
19. The multi-ply bath tissue according to claim 18 , wherein the bath tissue includes at least about 15% northern softwood kraft fibers.
20. The multi-ply bath tissue according to claim 19 , wherein the bath tissue includes at least about 25% northern softwood kraft fibers.
21. The multi-ply bath tissue according to claim 20 , wherein the bath tissue includes about 14% to about 40% northern softwood kraft fibers and about 60% to about 86% eucalyptus fibers.
22. The multi-ply bath tissue according to claim 13 , further comprising a third ply sandwiched between the first ply and the second ply.
23. The multi-ply bath tissue according to claim 22 , wherein the third ply includes southern hardwood fibers, southern softwood fibers, and recycled fibers.
24. The multi-ply bath tissue according to claim 23 , wherein the third ply includes only one layer and has temporary wet strength resin throughout the one layer.
25. The multi-ply bath tissue according to claim 22 , wherein the third ply has a lower CD wet tensile strength than that of each of the first ply and the second ply.
26. The multi-ply bath tissue according to claim 13 , wherein the bath tissue is free from cellulosic microfiber.
27. The multi-ply bath tissue according to claim 13 , wherein the bath tissue has a caliper of greater than about 130 mils/8 plies.
28. The multi-ply bath tissue according to claim 13 , wherein the bath tissue has a basis weight of about 30 lbs/ream to about 40 lbs/ream.
29. The multi-ply bath tissue according to claim 13 , wherein the bath tissue has a wet abrasion lint area to CD wet tensile strength ratio of about 0.15 mm 2 /gram to about 0.25 mm 2 /gram.
30. The multi-ply bath tissue according to claim 13 , wherein the bath tissue has a wet abrasion lint area to CD wet tensile strength ratio of about 0.20 mm 2 /gram.
31. A multi-ply bath tissue comprising:
a first ply providing a first surface of the bath tissue, the first ply including first and second layers, the first layer of the first ply forming the first surface, the first layer of the first ply including a temporary wet strength resin and the second layer of the first ply being free from a temporary wet strength resin; and
a second ply providing a second surface of the bath tissue, the second ply including first and second layers, the first layer of the second ply forming the second surface, the first layer of the second ply including a temporary wet strength resin and the second layer of the second ply being free from a temporary wet strength resin,
wherein the bath tissue has a CD wet tensile strength of between about 55 grams to about 75 grams, and
wherein the bath tissue has a wet abrasion lint area to CD wet tensile strength ratio of less than about 0.333 mm 2 /gram when the web abraded lint area is determined according to the Wet Abrasion Lint Test.
32. The multi-ply bath tissue of claim 31 , wherein the bath tissue has a CD wet tensile strength of between about 65 grams to about 75 grams.
33. The multi-ply bath tissue according to claim 31 , wherein the wet abraded area to CD wet tensile strength ratio is about 0.333 mm 2 /gram to about 0.06 mm 2 /gram.
34. The multi-ply bath tissue according to claim 31 , wherein the bath tissue has a GM break modulus of less than about 60g/% strain.
35. The multi-ply bath tissue according to claim 31 , wherein the bath tissue includes northern softwood kraft fibers and eucalyptus fibers.
36. The multi-ply bath tissue according to claim 35 , wherein the bath tissue includes at least about 15% northern softwood kraft fibers.
37. The multi-ply bath tissue according to claim 35 , wherein the bath tissue includes at least about 25% northern softwood kraft fibers.
38. The multi-ply bath tissue according to claim 37 , wherein the bath tissue includes about 14% to about 40% northern softwood kraft fibers and about 60% to about 86% eucalyptus fibers.
39. The multi-ply bath tissue according to claim 31 , further comprising a third ply sandwiched between the first ply and the second ply.
40. The multi-ply bath tissue according to claim 31 , wherein the third ply includes southern hardwood fibers, southern softwood fibers, and recycled fibers.
41. The multi-ply bath tissue according to claim 40 , wherein the third ply includes only one layer and has temporary wet strength resin throughout the one layer.
42. The multi-ply bath tissue according to claim 40 , wherein the third ply has a lower CD wet tensile strength than that of each of the first ply and the second ply.
43. The multi-ply bath tissue according to claim 31 , wherein the bath tissue is free from cellulosic microfiber.
44. The multi-ply bath tissue according to claim 31 , wherein the bath tissue has a caliper of greater than about 130 mils/8 plies.
45. The multi-ply bath tissue according to claim 31 , wherein the bath tissue has a basis weight of between about 30 lbs/ream to about 40 lbs/ream.
46. The multi-ply bath tissue according to claim 31 , wherein the bath tissue has a wet abrasion lint area to CD wet tensile strength ratio of about 0.15 mm 2 /gram to about 0.25 mm 2 /gram.
47. The multi-ply bath tissue according to claim 31 , wherein the bath tissue has a wet abrasion lint area to CD wet tensile strength ratio of about 0.20 mm 2 /gram.