Tissue products containing deliquescent materials and non-ionic surfactants

a technology of deliquescent materials and surfactants, which is applied in the directions of non-fibrous pulp addition, application, biocide, etc., to achieve the effects of improving handfeel, reducing the surface tension of solution, and optimizing the tactile sheet properties

Inactive Publication Date: 2006-11-02
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004] It has now been discovered that aqueous solutions having a sufficiently high concentration of deliquescent salts, in particular deliquescent inorganic salts, can be incorporated into tissue product sheets at high speeds so as to impart a noticeable wet feel to the product. In particular, it has been determined that combining a non-ionic surfactant with the deliquescent salt solution reduces the surface tension of the solution sufficiently to enable the deliquescent salt solution to be quickly absorbed by the tissue shee

Problems solved by technology

Furthermore, it has been discovered that the non-ionic surfactant can be used to control the equilibrium moisture content of the sheet and thereby optimize the tactile s

Method used

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  • Tissue products containing deliquescent materials and non-ionic surfactants

Examples

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example 1

[0029] This example demonstrates the reduction in the Single Water Drop Test values by incorporating small amounts of a non-ionic surfactant into the surfactant / deliquescent salt solution. Specifically, an aqueous solution of magnesium chloride (MgCl2) was prepared by dissolving 2.95 parts of MgCl2.6H20 in 1 part of distilled water at room temperature. This ratio gave a deliquescent salt solution having 35 percent by weight MgCl2. The solution had a Single Water Drop Test value of 41 seconds when placed on a 3-ply creped, untreated, facial tissue basesheet.

[0030] For comparison, 20×10−3 ml of an non-ionic surfactant was added to 100 parts of the concentrated magnesium chloride solution. The non-ionic surfactant was, 2,4,7,9-tetramethyl-5-decene-4,7-diol ethoxylate (1.75 EO / OH) obtained from Aldrich Chemical Co., Milwaukee, Wis. After mixing, when placed on the same 3-ply creped, untreated facial tissue basesheet, the resulting surfactant / deliquescent salt solution was found to have...

examples 2 and 3

[0031] These comparative examples demonstrate the impact that the addition of a small amount of non-ionic surfactant can have on speed and absorption of the deliquescent salt solution into a tissue product run on commercial manufacturing equipment. For both Examples 2 and 3, a two-ply creped tissue sheet having a finished basis weight of 15.0 pounds per 2880 square feet and a furnish consisting of 65 percent hardwood and 35 percent softwood fibers was used. Each ply was made from a stratified fiber furnish including two outer layers and a middle layer. The deliquescent salt solution was printed on both outer sides of the 2-ply tissue product via a simultaneous offset rotogravure printing process. The salt solutions were delivered as aqueous solutions having approximately 42 percent solids. The gravure rolls were electronically engraved, chrome-over-copper rolls supplied by Southern Graphics Systems, located at Louisville, Ky. The rolls had a line screen of 360 cells per lineal inch ...

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Abstract

Tissue products, such as facial tissue, bath tissue, paper towels, table napkins and the like can be improved by incorporating a sufficient amount of a deliquescent material and a non-ionic surfactant into the product. The deliquescent material is capable of maintaining a very high equilibrium amount of water in the product which can be advantageous in preventing the products from drying out and improving hand feel. The non-ionic surfactant improves the ability to incorporate the deliquescent materials into the tissue products quickly during manufacture and can help control the equilibrium moisture content of the product.

Description

BACKGROUND OF THE INVENTION [0001] Tissue products, such as facial tissue, toilet paper, table napkins, paper towels and the like, generally have a very low moisture content of about 5 percent or less. While it is known to add humectants to tissue products to absorb moisture and improve the hand feel, humectants do not absorb appreciable quantities of water relative to their weight. Hence, very large amounts of the humectant material are required to absorb moisture in amounts sufficient to be effective. In addition, humectant materials do not form solutions with the water but rather exist as water / humectant complexes. Hence the water is bound to the humectant material and does not impart the same effect as free water in the sheet. Further, if the humectant material is a solid particulate, it will remain as a solid particulate in the sheet and can impart a gritty feel. [0002] In commonly-assigned co-pending patent application Ser. No. 10 / 808,744, filed Mar. 24, 2004, by Shannon et al...

Claims

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Application Information

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IPC IPC(8): D21H21/24D21H17/66
CPCD21H27/002D21H21/24
Inventor SHANNON, THOMAS GERARDARGO, BRIAN PATRICKURLAUB, JOHN JERALD
Owner KIMBERLY-CLARK WORLDWIDE INC
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