Embossed tissue product with improved bulk properties
View Patent ↗Embossed and rolled tissue products are disclosed. In particular, an embossing pattern is used that enhances the softness and bulk of a tissue product without a substantial degradation in strength. The embossing patterns of the present invention are particularly well suited for use with bath tissues and with webs that have not been through-air dried. The web can be, for instance, a wet-pressed web that has been creped.
1. A rolled tissue product comprising:
a base sheet spirally wound into a roll comprising at least one ply, the ply having a basis weight of from about 10 gsm to about 40 gsm, the ply comprising pulp fibers, the ply not being through-air dried; and
wherein the ply defines a background embossing pattern formed therein such that the ply has a geometric mean tensile strength of less than about 1,400 g/3 inches and the wound roll has a roll bulk in relation to a Kershaw roll firmness such that:
Roll bulk (cm 3 /g)>1.55*Kershaw Roll Firmness(g)+3.7.
2. A rolled tissue product as defined in claim 1 , wherein the base sheet comprises a single ply.
3. A rolled tissue product as defined in claim 1 , wherein the base sheet comprises two plies.
4. A rolled tissue product as defined in claim 3 , wherein the two plies have been embossed together.
5. A rolled tissue product as defined in claim 1 , wherein the background pattern covers at least 75 percent of the surface area of one side of the ply.
6. A rolled tissue product as defined in claim 1 , wherein the background pattern covers at least 90 percent of the surface area of one side of the ply.
7. A rolled tissue product as defined in claim 1 , wherein the ply has been embossed in a dry state.
8. A rolled tissue product as defined in claim 1 , wherein the background pattern comprises a pattern of discrete shapes, the discrete shapes being present in an amount of at least 50 shapes per square inch.
9. A rolled tissue product as defined in claim 8 , wherein the discrete shapes are present in an amount of from about 150 to about 250 shapes per square inch.
10. A rolled tissue product as defined in claim 8 , wherein the discrete shapes have a maximum dimension of from about 0.03 inches to about 0.10 inches.
11. A rolled tissue product as defined in claim 8 , wherein the discrete shapes appear in rows, the shapes being spaced from about 0.055 inches to about 0.075 inches apart in each row from a center of one shape to a center of an adjacent shape.
12. A rolled tissue product as defined in claim 11 , wherein the rows are spaced from about 0.06 inches to about 0.14 inches apart from a center of one row to a center of an adjacent row.
13. A rolled tissue product as defined in claim 11 , wherein the discrete shapes appearing in adjacent rows are offset.
14. A rolled tissue product as defined in claim 11 , wherein the rows form a wave-like pattern.
15. A rolled tissue product as defined in claim 14 , wherein the wave-like pattern comprises sine waves.
16. A rolled tissue product as defined in claim 8 , wherein the discrete shapes comprise indentations in the ply.
17. A rolled tissue product as defined in claim 8 , wherein the background pattern is combined with an additional embossing pattern.
18. A rolled tissue product as defined in claim 1 , wherein the embossed ply has been creped.
19. A rolled tissue product as defined in claim 1 , wherein the product has a roll bulk of from about 5 to about 17.
20. A process for producing a rolled tissue product comprising:
providing a base sheet comprising at least one ply, the ply having a basis weight of from about 10 gsm to about 40 gsm, the ply comprising pulp fibers, the ply not being through-air dried;
embossing the ply according to a background embossing pattern, the embossed ply having a geometric mean tensile strength of less than about 1,400 g/3 inches; and
winding the base sheet into a wound roll, wherein the ply has been embossed in such a manner that the wound roll has a roll bulk in relation to a Kershaw roll firmness such that:
Roll bulk (cm 3 /g)>1.55*Kershaw Roll Firmness(g)+3.7.
21. A process as defined in claim 20 , wherein the base sheet only includes the one embossed ply.
22. A process as defined in claim 20 , wherein the background pattern covers at least 75 percent of the surface area of one side of the ply.
23. A process as defined in claim 20 , wherein the background pattern covers at least 90 percent of the surface area of one side of the ply.
24. A process as defined in claim 20 , wherein the ply is embossed in a substantially dry state.
25. A process as defined in claim 20 , wherein the background pattern comprises a pattern of discrete shapes, the discrete shapes being present in an amount of at least 50 shapes per square inch.
26. A process as defined in claim 25 , wherein the discrete shapes are present in an amount of at least about 150 to about 250 shapes per square inch.
27. A process as defined in claim 25 , wherein the shapes have a maximum dimension of from about 0.03 inches to about 0.10 inches.
28. A process as defined in claim 25 , wherein the discrete shapes appear in rows, the shapes being spaced from about 0.055 inches to about 0.075 inches apart in each row from a center of one shape to a center of an adjacent shape.
29. A process as defined in claim 28 , wherein the rows are spaced from about 0.06 inches to about 0.14 inches apart from a center of one row to a center of an adjacent row.
30. A process as defined in claim 28 , wherein the discrete shapes appearing in adjacent rows are offset.
31. A process as defined in claim 28 , wherein the rows are in a wave-like pattern.
32. A process as defined in claim 25 , wherein the background pattern is combined with an additional pattern.
33. A process as defined in claim 20 , wherein the ply of the base sheet has been creped.
34. A process as defined in claim 20 , wherein the wound roll has a roll bulk of from about 5 to about 17.
35. A rolled tissue product comprising:
a base sheet spirally wound into a roll comprising at least one ply, the ply comprising pulp fibers; and
an embossed pattern formed into the ply according to a background pattern, the background pattern comprising a pattern of discrete shapes, the discrete shapes being present in an amount of at least 50 shapes per square inch, the shapes having a maximum dimension of from about 0.03 inches to about 0.10 inches, the discrete shapes appearing in rows, the shapes being spaced from about 0.04 inches to about 0.09 inches apart in each row from a center of one shape to a center of an adjacent shape, the rows being spaced from about 0.06 inches to about 0.14 inches apart from a center of one row to a center of an adjacent row, and wherein the wound roll has a roll bulk in relation to a Kershaw roll firmness such that:
Roll bulk (cm 3 /g)>1.55*Kershaw Roll Firmness(g)+3.7.
36. A rolled tissue product as defined in claim 35 , wherein the ply has a basis weight of from about 10 gsm to about 40 gsm, the ply not being through-air dried, the ply having been creped.
37. A rolled tissue product as defined in claim 35 , wherein the background pattern covers at least 75 percent of the surface area of one side of the ply.
38. A rolled tissue product as defined in claim 35 , wherein the ply has been embossed in a dry state.
39. A rolled tissue product as defined in claim 35 , wherein the rows of the background pattern form a wave-like pattern.
40. A rolled tissue product as defined in claim 35 , wherein the rolled product has a roll bulk of from about 7 to about 15.