Tissue products having high durability and a deep discontinuous pocket structure
View Patent ↗A tissue sheet having a deep discontinuous pocket structure provides improved durability as measured by the ratio of the cross-machine direction tensile energy absorbed to the cross-machine direction tensile strength.
1. A woven papermaking fabric having a regular series of distinct depressions in the surface of the fabric that are surrounded by raised warp or shute strands, said depressions having a depth from about 1.0 to about 5.5 millimeters, an opening having a length and width from about 5 to about 20 millimeters, and a frequency of occurrence in the surface of the fabric from about 0.8 to about 3.6 depressions per square centimeter, said fabric further having a top plane containing cross-machine direction impression knuckles formed by shute strands which pass over 2 or more warp strands, said top plane containing no machine direction impression knuckles.
2. The fabric of claim 1 wherein the openings of the depressions have a length and width of from about 10 to about 15 millimeters.
3. The fabric of claim 1 wherein the depressions are offset with respect to each other when the fabric is viewed in the machine direction.
4. A woven papermaking fabric having a regular series of distinct depressions in the surface of the fabric that are surrounded by raised warp or shute strands, said depressions having a depth from about 250 to about 525 percent of the warp strand diameter, an opening having a length and width from about 5 to about 20 millimeters, and a frequency of occurrence in the surface of the fabric from about 0.8 to about 3.6 depressions per square centimeter, said fabric further having a top plane containing cross-machine direction impression knuckles formed by shute strands which pass over 2 or more warp strands, said top plane containing no machine direction impression knuckles.
5. The fabric of claim 4 wherein the depressions have an opening having a length and width of from about 10 to about 15 millimeters.
6. The fabric of claim 4 wherein the depressions are offset with respect to each other when the fabric is viewed in the machine direction.