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Method for enhancing softness of paper for daily use

A tissue paper and softness technology, applied in the post-treatment and modification of cellulose pulp, can solve the problems that are not conducive to human health and environmental quality, and affect the strength of paper, so as to be beneficial to human health and improve the degree of smoothness , Improve the effect of soft performance

Inactive Publication Date: 2017-01-04
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding chemical softeners will not only affect the strength of the paper, but also be harmful to human health and environmental quality

Method used

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  • Method for enhancing softness of paper for daily use
  • Method for enhancing softness of paper for daily use
  • Method for enhancing softness of paper for daily use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for improving the softness of household paper (toilet paper), comprising the steps of:

[0020] 1) beating bleached softwood kraft pulp to a beating degree of 30°SR; obtaining fiber pulp;

[0021] 2) Get six parts of equal mass fiber slurry, add water to adjust the mass concentration of fiber slurry to 5%, adjust pH to 6.0, add different amounts of cellulase in six parts, so that the mass fraction of cellulase is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, at a temperature of 50°C, act on cellulase for 60 minutes;

[0022] 3) Dilute the material obtained in step 2) with water to a mass concentration of 1%, and make 20g / m with a slicer 2 tissue paper (toilet paper). See Table 1, 2, 3.

[0023] Table 1 Effect of cellulase dosage on softening properties of bleached softwood kraft pulp

[0024]

[0025] Table 2 Effect of cellulase dosage on strength properties of bleached softwood kraft pulp

[0026]

[0027] Table 3 Effect of cellulase dosage on wate...

Embodiment 2

[0030] A method for improving the softness of household paper (toilet paper), comprising the steps of:

[0031] 1) beating bleached hardwood kraft pulp to a beating degree of 35°SR; obtaining fiber pulp;

[0032] 2) Get six parts of equal mass fiber slurry, add water to adjust the mass concentration of fiber slurry to 10%, adjust pH to 5.5, add different amounts of cellulase in six parts, so that the mass fraction of cellulase is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, at 60°C, act on cellulase for 30 minutes;

[0033] 3) Dilute the material obtained in step 2) with water to a mass concentration of 1%, and make 30g / m with a slicer 2 tissue paper (toilet paper). See Table 4, 5, 6.

[0034] Table 4 Effect of cellulase dosage on softening properties of bleached hardwood kraft pulp

[0035]

[0036] Table 5 Effect of cellulase dosage on strength properties of bleached hardwood kraft pulp

[0037]

[0038] Table 6 Effect of cellulase dosage on water retention valu...

Embodiment 3

[0041] A method for improving the softness of household paper (facial tissue), comprising the steps of:

[0042] 1) beating the mechanical pulp to a beating degree of 25°SR; obtaining fiber pulp;

[0043] 2) Get six parts of equal mass fiber slurry, add water to adjust the mass concentration of fiber slurry to 3%, adjust pH to 5.5, add different amounts of cellulase in six parts, so that the mass fraction of cellulase is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, at 40°C, act on cellulase for 120 minutes;

[0044] 3) Dilute the material obtained in step 2) with water to a mass concentration of 1%, and use a paper machine to make 30g / m 2 tissue paper (facial tissue). See Table 7, 8, 9.

[0045] Table 7 Effect of cellulase dosage on mechanical pulp softness

[0046]

[0047] Table 8 Effect of cellulase dosage on mechanical pulp strength properties

[0048]

[0049] Table 9 Effect of cellulase dosage on water retention value of mechanical pulp

[0050]

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Abstract

The invention discloses a method for enhancing softness of paper for daily use. The method comprises the following steps: 1) pulping a fibrous raw material until the beating degree is 25-35 degrees SR, or carrying out standing and fluffing to obtain a fiber pulp; 2) adding water to regulate the mass concentration of the fiber pulp to 3-10%, regulating the pH value to 5.5-6.0, adding cellulase until the mass percent of the cellulase is 0.2-1.0%, and acting at 40-60 DEG C for 30-120 minutes; and 3) diluting the material obtained in the step (2) with water until the mass concentration is 1%, and making the paper for daily use by using a sheet-making apparatus or paper machine. The cellulase is utilized to treat the pulp, thereby promoting the loosening of the fibrocyte wall structure, lowering the cohesive force of the fibers, enhancing the fibrillation degree of the fibers and increasing the softness of the fibers. The cellulase is prepared by fermentation, and thus, is green and safe. Compared with the conventional chemical softener, the cellulase is beneficial to human health and pollution-free for the environment, and is safe, green and environment-friendly for production.

Description

technical field [0001] The invention relates to a method for improving the softness of household paper. [0002] technical background [0003] Household paper such as toilet paper and facial tissue is an indispensable product in people's daily life. For household paper, softness is one of the important properties of its paper. At present, the improvement of softness of household paper mainly depends on adding chemical softeners in paper production. The main function of chemical softeners is to interfere with the bonding between fibers. It is not easy to degrade and will irritate human skin. Adding chemical softeners will not only affect the strength of the paper, but also be harmful to human health and environmental quality. Therefore, in order to protect human health and environmental quality, it is of great significance to research and develop a kind of green environmental protection and pollution-free household paper. Contents of the invention [0004] The purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/20
CPCD21H11/20
Inventor 刘洪斌李传友郭虎祥
Owner TIANJIN UNIV OF SCI & TECH
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