Composition method for composite talcum powder

A technology of talcum powder and mixture, which is applied in the direction of adding inorganic compounds, dyeing low-molecular organic compounds, dyeing high-molecular organic compounds, etc., can solve the problems of increasing water treatment load, weakening paper strength, reducing paper quality, etc., to increase The whiteness of paper, the effect of increasing the tensile strength and saving the amount of fiber

Inactive Publication Date: 2008-09-10
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the single-pass retention rate of talcum powder filler in the fourdrinier paper machine is about 15%, and the retention rate of white water after multiple reuses is only about 40%. A large amount of filler will flow away with water, which not only wastes raw materials, but also increases the water treatment load.
At the same time, there is no binding force between the talcum powder filler and the fiber, so it cannot be added too much, otherwise it will easily cause powder and hair loss after the paper is made, which will weaken the strength of the paper and reduce the quality of the paper.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) talcum powder is dispersed into mass concentration and is 1% dispersed suspension liquid, after fully dissolving mass concentration is 1% macromolecule aqueous solution (starch aqueous solution) mixes, the mass ratio of talcum powder and starch aqueous solution is 50: 1, get the mixture.

[0021] (2) The mixture obtained in step (1) is mixed with acidic electrolytic solution sulfuric acid; acidic electrolytic solution sulfuric acid: the volume ratio of the mixture is 5: 1, then stirred for 30 minutes, and the rotating speed was 200 rpm. After standing overnight, remove the supernatant Liquid, the lower white layer substance is the composite talcum powder filler, and the obtained composite talcum powder filler is in the form of particles visible to the naked eye. In 90 grams of paper, adding 15% (mass percentage) of the composite talc filler of the present invention increases the tensile strength of the paper by 10%.

Embodiment 2

[0023] (1) talcum powder is dispersed into mass concentration and is 50% dispersed suspension liquid, after fully dissolving mass concentration is 30% macromolecule aqueous solution (oxidized starch aqueous solution) mixes, the mass ratio of talcum powder and oxidized starch aqueous solution is 10:1, a mixture was obtained.

[0024] (2) The mixture obtained in step (1) is mixed with the acidic electrolytic solution ammonium nitrate solution, ammonium nitrate: the volume ratio of the mixture is 1: 1, stir evenly, then after standing still, remove the supernatant liquid, and the white layer substance in the lower layer is the compound Talcum powder filler, the obtained composite talcum powder filler is in the form of particles visible to the naked eye. In 90 grams of paper, add 15% (mass percentage) of the composite talc filler of the present invention, the paper tensile strength increases by 25%, the filler retention rate increases by 20%, and the paper whiteness increases by 5...

Embodiment 3

[0026] (1) talcum powder is dispersed into mass concentration and is the dispersed suspension of 25%, pours into fully dissolved mass concentration and is the polymer aqueous solution (chitosan aqueous solution) of 25%, the mass ratio of talcum powder and chitosan aqueous solution is 1:5, after mixing uniformly, a mixture was obtained.

[0027] (2) the mixture that step (1) is obtained is poured in the acid electrolyte solution ammonium chloride solution, and ammonium chloride: mixture volume ratio is 10: 1, stirs while pouring (stirring 30 minutes, rotating speed 200 revs / min), After standing overnight, the supernatant was removed, and the lower white layer was the composite talcum powder filler, and the obtained composite talcum powder filler was in the form of particles visible to the naked eye. In 90 grams of paper, 15% (mass percentage) of the composite talc filler of the present invention is added, and the tensile strength of the paper increases by 150%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention discloses a composite method for a composite talcum powder filler, the method comprises the following steps of: dispersing talcum powder into dispersing suspension with 1 to 50 percent mass concentration, after mixing evenly with macromolecular water solution with 1 to 30 percent mass concentration, mixing the talcum powder with acidic electrolyte solution, and stirring evenly; or adding fatty acid and mixing evenly, then mixing with the acidic electrolyte solution, and stirring evenly; after standing the stirred evenly liquid and removing an upper layer of clear liquid, a lower layer of white substance is the composite talcum powder filler. The composite method for the composite talcum powder filler can improve hydrophilicity of the talcum powder and fiber, increase amount of the talcum powder as well as strength of paper, the composite method for the composite talcum powder filler also has the advantages of improving filler levels, increasing paper brightness, reducing wastewater treatment load and further saving the using amount of the fiber.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for compounding compound talcum powder filler used in papermaking and filling process. Background technique [0002] Talc powder is a commonly used white filler and pigment for papermaking. At present, talc powder has a very large consumption in the entire paper industry filler market. Other main fillers include calcium carbonate and kaolin, which are the main minerals added in the papermaking process. . The main purpose of filling is to increase the opacity and whiteness, improve the printing performance of the paper, and reduce the production cost. It is an important step in the papermaking process. [0003] Now paper mills add talcum powder fillers directly into the slurry. Since fillers are minerals and lack binding force with fibers, retention aids need to be added to minimize the loss of fillers. Generally, the single-pass retention rate of talcum po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10C09C3/08D21H17/69
Inventor 颜进华
Owner GUANGDONG IND TECHN COLLEGE
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