Tissue having high strength and low modulus
View Patent ↗The present invention provides tissue products having a high degree of stretch and low modulus at relatively high tensile strengths, such as geometric mean tensile strengths greater than about 1500 g/3″ and more preferably greater than about 2000 g/3″. The combination of a tough, yet relatively supple sheet is preferably achieved by subjecting the embryonic web to a speed differential as it is passed from one fabric in the papermaking process to another, commonly referred to as rush transfer.
1. A tissue product having a GM Slope (expressed as kilograms per three inches) less than or equal to about:
0.0042*GMT−0.5286
wherein GMT is the Geometric Mean Tensile (expressed as grams per three inches) and the GMT is from about 2500 g/3″ to about 3500 g/3″.
2. The tissue product of claim 1 having a bone dry basis weight from about 30 to about 80 grams per square meter (gsm).
3. The tissue product of claim 1 having a percent MD Stretch greater than about 25 percent.
4. The tissue product of claim 1 wherein the product comprises a single ply tissue web having a bone dry basis weight from about 50 to about 80 gsm.
5. The tissue product of claim 4 wherein the single ply tissue web is an uncreped through-air dried web.
6. The tissue product of claim 1 wherein the product comprises two or more plies and the product has a bone dry basis weight from about 40 to about 70 gsm.
7. A tissue product of claim 1 having a MD TEA greater than about 45 g*cm/cm 2 .
8. The tissue product of claim 7 having a MD Slope less than about 7.5 kg/3″.
9. The tissue product of claim 7 having a GM Slope less than about 10 kg/3″.
10. The tissue product of claim 7 having a Stiffness Index less than about 5.0.
11. The tissue product of claim 7 having a bone dry basis weight greater than about 50 gsm.
12. The tissue product of claim 7 wherein the product comprises at least one through-air dried tissue ply.
13. The tissue product of claim 12 wherein the at least one through-air dried tissue ply is uncreped.
14. The tissue product of claim 1 having a MD TEA greater than about 70 g*cm/cm 2 .
15. A tissue product comprising cellulosic fibers and a wet strength agent selected from the group consisting of polyamide epichlorohydrin resins and glyoxalated polyacrylamide resins, the tissue product having a GM Slope (expressed as kilograms per three inches) less than or equal to about:
0.0042*GMT−0.5286
wherein GMT is the Geometric Mean Tensile (expressed as grams per three inches) and the GMT is from about 2500 g/3″ to about 3500 g/3″.
16. The tissue product of claim 15 having a percent MD Stretch greater than about 25 percent.
17. The tissue product of claim 15 , wherein the tissue product comprises a one or more uncreped through-air dried plies.
18. The tissue product of claim 15 having a MD Slope less than about 5.0 kg/3″.