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High density tissue and process of making

 Paul Thomas Weisman et al
A smooth, high density tissue. The tissue has a relatively low caliper, yet maintains visually discernible machine direction micropeaks at a suitable micropeak frequency.
Inventors: Paul Thomas Weisman, Scott Thomas Loughran
Assignee: The Procter & Gamble Company

U.S. Classification
162/113; 162/111; 162/117

International Classification
D21H 1100

View patent at USPTO

Citations

Patent NumberTitleIssue date
1224650(unknown)May 1917
3044228(unknown)Jul 1962
3124504(unknown)Mar 1964
3203850(unknown)Aug 1965
4191609Soft absorbent imprinted paper sheet and method of manufacture thereofMar 4, 1980
4300981Layered paper having a soft and smooth velutinous surface, and method of making such paperNov 17, 1981
4528239Deflection memberJul 9, 1985
5246545Process for applying chemical papermaking additives from a thin film to tissue paperSep 21, 1993
5354425Tissue paper treated with polyhydroxy fatty acid amide softener systems that are biodegradableOct 11, 1994

Referenced by

Patent NumberTitleIssue date
6180216Tissue paperJan 30, 2001
6265052Tissue paperJul 24, 2001
6458450Tissue paperOct 1, 2002
6602387Thick and smooth multi-ply tissueAug 5, 2003
7037575Process for high fidelity printing of tissue substrates, and product made therebyMay 2, 2006
7056572Thin, soft bath tissue having a bulky feelJun 6, 2006

Claims

What is claimed is:

1. A process of making smooth tissue paper, said process comprising the steps of:

providing an aqueous dispersion of papermaking fibers;
providing a water pervious Fourdrinier wire;
forming an embryonic web of said papermaking fibers on said wire;
providing a through air drying belt;
transferring said web to said through air drying belt, wherein a first plurality of regions of said web are dedensified upon transfer;
blowing air through said web
providing a Yankee drying drum;
transferring said web from said through air drying belt to said Yankee drying drum, whereby a second plurality of regions of said web are densified upon transfer;
drying said web on said Yankee drying drum to a mean moisture level of about 1.9 to 10.0 percent to yield a multi-density tissue suitable for calendering;
providing two axially parallel rolls juxtaposed to form a nip therebetween, said nip being suitable for calendering said tissue; and
calendering said tissue in said nip at said mean moisture level to provide said tissue with a smoothness less than or equal to about 600 microns and a micropeak frequency of at least about 30 micropeaks per inch.

2. The process according to claim 1 wherein said tissue has an average micropeak height of at least about 0.10 millimeters.

3. The process according to claim 1 wherein said nip provides a pressure during said calendering of said tissue of a bout 20 to 2,000 psi.

4. The process according to claim 3 wherein said nip provides a lineal pressure during said calendering of said tissue web of about 30 to 400 pli.

5. A paper according to claim 1 wherein said tissue has a micropeak frequency of about 30 to about 60 micropeaks per inch.