Method to debond paper on a paper machine

a paper machine and paper machine technology, applied in papermaking, non-fibrous pulp addition, coatings, etc., can solve the problems of significant down time for grade changes, debonder presence, and through-air drying processes that are not as amenable to crepiness as yankee dryer processes

a paper machine and paper machine technology, applied in papermaking, non-fibrous pulp addition, coatings, etc., can solve the problems of significant down time for grade changes, debonder presence, and through-air drying processes that are not as amenable to crepiness as yankee dryer processes

US20050241791A1Inactive Publication Date: 2005-11-03KIMBERLY-CLARK WORLDWIDE INC
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  • Method to debond paper on a paper machine

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[0050] Uncreped through-air dried tissue products were produced as described below. The chemicals screened included the following examples:

[0051] 1) Hercules® PPD D-1203 debonder

[0052] 2) Arosurf PA 777 debonder

[0053] The speed of the continuous sheet former machine used in the testing was about 50 ft. / minute. The headbox used was a Voith three-layer headbox. The fiber furnish used for each layer was 53% recycled fiber, 31% northern softwood kraft fiber, and 16% southern softwood kraft fiber. The forming wire was a Voith 2164B. After formation, the wet sheet is transferred to a transfer wire, Voith 2164. The chemical composition sprayed on the sheet was according to Table 1.

[0054] The spraying equipment used comprised Spraying Systems Company spray nozzles 1 / 4 JCO-SS+SUE15B-SS with SUE 15B spray set-up. The spray boom was located just prior to the vacuum slot on the fabric. The spray fans were aimed directly at the sheet. Given the configuration of the machine, this resulted in ...

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Abstract

Disclosed is a method of making a soft, strong cellulosic tissue sheet comprising the steps of forming a web of cellulosic fibers on a forming wire, thereafter treating the exposed surface of the web with a treatment composition comprising a chemical debonding agent, subjecting the opposing surface of the web to vacuum suction whereby the chemical debonding agent is distributed substantially through the entire thickness of the web, and through-air drying the web. The method allows grade changes to be made much more rapidly and with less waste than when adding debonder at the wet end of the paper making process.

Description

BACKGROUND OF THE INVENTION [0001] In the manufacture of paper products from cellulose fibers, such as facial tissue, bath tissue, paper towels, dinner napkins and the like, it is often desirable to enhance product properties by the addition of chemical additives. Properties that may be enhanced using additives include: dry strength, wet strength, softness, absorbency, opacity, brightness and color. [0002] Softness is a key attribute in tissue products. A feeling of softness imparts to human skin a clean and soothing effect. Improving the balance of tissue softness and strength is a continuous effort in tissue making. Tissue product designers attempt to maximize the strength and softness of tissues. It has been recognized as a general rule of tissue manufacture that the greater the strength of a given tissue, the lower the softness of that tissue. There is usually an inverse relationship between strength and softness. [0003] In general, prior efforts have been directed at achieving ...

Claims

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Application Information

Patent Timeline
03 Nov 2005
Publication
US20050241791A1
IPC
D21F11/14; D21H21/22; D21H23/28
CPC
D21F11/14
Inventors
WOLKOWICZ, RICHARD I.; YANG, NING