Method for increasing the internal bulk of throughdried tissue
AssigneeKimberly-Clark Corporation
InventorsMichael A. Hermans, Fung-Jou Chen, Harry L. Spiegelberg, Bernhardt E. Kressner, Janice G. Nielsen
Life of this patent
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Abstract
The internal bulk of a tissue web can be improved during manufacturing of the basesheet by subjecting the tissue web to differential pressure while supported on a coarse fabric at a consistency of about 30 percent or greater. The differential pressure, such as by applying vacuum suction to the underside of the coarse fabric, causes the wet web to deflect into the openings or depressions in the fabric and "pop" back, resulting in a substantial gain in thickness or internal bulk. The method is especially adapted to improve the internal bulk of throughdried tissue webs.
Claims5
A method for making a throughdried tissue product comprising:
- (a) depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web;
- (b) transferring the wet web to a throughdrying fabric;
- (c) carrying the web over a first throughdryer and partially drying the web to a consistency of from about 28% to about 45%;
- (d) transferring the partially dried web to a second throughdrying fabric;
- (e) sandwiching the partially dried web between the second throughdrying fabric and a coarse fabric;
- (f) deflecting the web to substantially conform the web to the contour of the coarse fabric;
- (g) carrying the web over a second throughdryer to dry the web to a consistency of about 85% or greater;
- (h) transferring the web to a Yankee dryer;
- and
- (i) creping the web.
Dependencies are inferred from the claim text.