Absorbent sheet made by fabric crepe process
A process for making absorbent cellulosic paper products such as sheet for towel, tissue and the like, includes compactively dewatering a nascent web followed by wet belt creping the web at an intermediate consistency of anywhere from about 30 to about 60 percent under conditions operative to redistribute the fiber on the belt, which is preferably a fabric. In preferred embodiments, the web is thereafter adhesively applied to a Yankee dryer using a creping adhesive operative to enable high speed transfer of the web of intermediate consistency such as a poly(vinyl alcohol)/polyamide adhesive. An absorbent sheet so prepared from a papermaking furnish exhibits an absorbency of at least about 5 g/g, a CD stretch of at least about 4 percent, and an MD/CD tensile ratio of less than about 1.1, and also exhibits a maximum CD modulus at a CD strain of less than 1 percent and sustains a CD modulus of at least 50 percent of its maximum CD modulus to a CD strain of at least about 4 percent. Products of the invention may also exhibit an MD modulus at break 1.5 to 2 times their initial MD modulus.
1. An absorbent sheet prepared from a papermaking furnish, said sheet exhibiting an absorbency of at least about 5 g/g, a CD stretch of at least about 4 percent and an MD break modulus higher than its initial MD modulus, as well as including: (i) a plurality of fiber enriched regions of relatively high local basis weight interconnected by way of (ii) a plurality of lower local basis weight linking regions whose fiber orientation is biased along the direction between regions interconnected thereby.
2. The absorbent sheet according to claim 1 , wherein the sheet exhibits an MD break modulus of at least about 1.5 times its initial MD modulus.
3. The absorbent sheet according to claim 1 , wherein the sheet exhibits an MD break modulus of at least about twice its initial MD modulus.
4. The absorbent sheet according to claim 1 , wherein the sheet has an absorbency of from about 5 g/g to about 12 g/g.
5. The absorbent sheet according to claim 1 , wherein the absorbency of the sheet (g/g) is at least about 0.7 times the specific volume of the web (cc/g).
6. The absorbent sheet according to claim 1 , wherein the absorbency of the sheet (g/g) is from about 0.75 to about 0.9 times the specific volume of the web (cc/g).
7. The absorbent sheet according to claim 1 , wherein the sheet has a CD stretch of from about 5 percent to about 20 percent.
8. The absorbent sheet according to claim 1 , wherein the sheet has a CD stretch of from about 5 percent to about 10 percent.
9. The absorbent sheet according to claim 1 , wherein the sheet has a CD stretch of from about 6 percent to about 8 percent.
10. The absorbent sheet according to claim 1 , wherein the sheet exhibits an MD/CD dry tensile ratio of from about 0.5 to about 0.9.
11. The absorbent sheet according to claim 1 , wherein the sheet exhibits an MD/CD dry tensile ratio of from about 0.6 to about 0.8.
12. An absorbent sheet prepared from a papermaking furnish, said sheet exhibiting an absorbency of at least about 5 g/g, a CD stretch of from about 5 percent to about 20 percent and an MD break modulus higher than its initial MD modulus as well as including: (i) a plurality of fiber enriched regions of relatively high local basis weight interconnected by way of (ii) a plurality of lower local basis weight linking regions whose fiber orientation is biased along the direction between regions interconnected thereby.
13. The absorbent sheet according to claim 12 , wherein the sheet has a CD stretch of from about 5 percent to about 10 percent.
14. The absorbent sheet according to claim 12 , wherein the sheet has a CD stretch of from about 6 percent to about 8 percent.
15. The absorbent sheet according to claim 12 , wherein the sheet has an MD stretch of at least about 40 percent.
16. The absorbent sheet according to claim 12 , wherein the sheet has an MD stretch of at least about 50 percent.
17. The absorbent sheet according to claim 12 , wherein the sheet has an MD stretch of at least about 70 percent.
18. The absorbent sheet according to claim 12 , wherein the sheet exhibits an MD/CD dry tensile ratio of from about 0.5 to about 0.9.
19. The absorbent sheet according to claim 12 , wherein the sheet exhibits an MD/CD dry tensile ratio of from about 0.6 to about 0.8.
20. An absorbent sheet prepared from a papermaking furnish exhibiting an absorbency of at least about 5 g/g, a CD stretch of from about 5 percent to about 20 percent, an MD break modulus higher than its initial MD modulus and an MD/CD tensile ratio of less than about 1.1, as well as including: (i) a plurality of pileated fiber enriched regions of relatively high local basis weight interconnected by way of (ii) a plurality of lower local basis weight linking regions whose fiber orientation is biased along the direction between pileated regions interconnected thereby.