Method for preparing capsule-type paper-making filler by spray-drying starch

A papermaking filler and spray dryer technology, which is applied in the papermaking field, can solve the problems of a large decline in paper strength properties, unbearable effects for papermaking enterprises, and insignificant effects, and achieves obvious modification effects, improved quality, and improved physical strength properties. Effect

Inactive Publication Date: 2016-04-06
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are three main problems: first, the process of filler modification is complicated and the cost is too high for paper-making enterprises; second, the effect of filler modification is not obvious. With the addition of filler, the strength and performance of paper will drop greatly ; The third is that with the increase of the amount of filler added, a series of problems will arise in the operation of the paper machine

Method used

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  • Method for preparing capsule-type paper-making filler by spray-drying starch
  • Method for preparing capsule-type paper-making filler by spray-drying starch

Examples

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Effect test

Embodiment 1

[0040]1) Weigh 100 kg of ordinary cornstarch, add 4900 kg of deionized water to prepare a starch suspension with a concentration of 2% by mass, stir and disperse evenly, and perform starch gelatinization. The starch gelatinization process is as follows: the stirring speed is 150rpm, the gelatinization temperature is 95°C, and the gelatinization time is 60min.

[0041] 2) Weigh 500 kg of light calcium carbonate with a particle size of 1250 mesh, add 2000 kg of deionized water to prepare a filler suspension with a mass percentage concentration of 20%, and then use a continuous high-shear homogenizer at a speed of 12000rpm Disperse evenly.

[0042] 3) Mix the gelatinized starch obtained in step 1) and the homogeneous paper-making filler obtained in step 2), and then perform homogenization treatment with a continuous high-shear homogenizer. The speed of homogenizer is 10000rpm.

[0043] 4) After the mixed suspension of starch and paper-making filler obtained in step 3) is spray-...

Embodiment 2

[0047] 1) Weigh 62.5 kg of potato starch and add 1500 kg of deionized water to prepare a starch suspension with a concentration of 4% by mass. Stir and disperse evenly before starch gelatinization. The starch gelatinization process is as follows: the stirring speed is 180rpm, the gelatinization temperature is 95°C, and the gelatinization time is 80min.

[0048] 2) Weigh 500 kg of kaolin with a particle size of 1250 mesh, add 1500 kg of deionized water to prepare a filler suspension with a concentration of 25% by mass, and then use a continuous high-shear homogenizer to disperse evenly at a speed of 14000 rpm.

[0049] 3) Mix the gelatinized starch obtained in step 1) and the homogeneous paper-making filler obtained in step 2), and then perform homogenization treatment with a continuous high-shear homogenizer. The speed of homogenizer is 12000rpm.

[0050] 4) After the mixed suspension of starch and paper-making filler obtained in step 3) is spray-dried by a centrifugal spray ...

Embodiment 3

[0054] 1) Weigh 60 kg of cationic starch, add 2340 kg of deionized water to prepare a starch suspension with a concentration of 2.5% by mass, stir and disperse evenly, and perform starch gelatinization. The starch gelatinization process is as follows: the stirring speed is 180rpm, the gelatinization temperature is 90°C, and the gelatinization time is 90min.

[0055] 2) Weigh 600 kg of talc powder with a particle size of 1250 mesh, add 2400 kg of deionized water to prepare a filler suspension with a concentration of 20% by mass, and then use a continuous high-shear homogenizer to disperse evenly at a speed of 14000 rpm .

[0056] 3) Mix the gelatinized starch obtained in step 1) and the homogeneous paper-making filler obtained in step 2), and then perform homogenization treatment with a continuous high-shear homogenizer. The speed of homogenizer is 10000rpm.

[0057] 4) After the mixed suspension of starch and paper-making filler obtained in step 3) is spray-dried by a centri...

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Abstract

The invention discloses a method for preparing capsule type papermaking filler by spray drying of starch. The method comprises the following steps: weighing starch with a certain quantity, evenly dispersing by water, and carrying out gelatinization; weighing papermaking filler with a certain quantity, dispersing by water, and homogenizing; mixing the papermaking filler with the homogenized starch, and homogenizing; carrying out spray drying on mixture of the papermaking filler and the gelatinized starch, and packing a starch layer onto the surface of papermaking filler particle to obtain the starch-packed capsule type papermaking filler. The method has the characters of simple technology, low cost, easiness in operation, obvious modification effect and the like. Compared with the unmodified papermaking filler, the capsule type papermaking filler can improve the filling quantity of paper, save the plant fiber raw materials, observably improve the physical strength performance of filling paper, and improve the quality of the final paper product.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for preparing capsule-type papermaking fillers by spray drying starch. Background technique [0002] In the paper industry, the addition of mineral fillers to pulp has a long history. Due to the advantages of saving plant fiber raw materials, increasing the speed of pulp filtration, and reducing energy consumption in the drying section of the paper machine, filling has been greatly developed in the paper industry. In the composition of raw materials in today's paper industry, fillers are second only to plant fibers, accounting for about 10%, and the proportion is still rising. However, with the addition of paper-making fillers, some problems also arise, such as the decrease in the strength of the paper, the deterioration of the sizing effect, the shortening of the life of the paper-making wire, and the tendency to lint and powder during printing. [0003] In order to overcom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/69
Inventor 曹石林马晓娟郑斌黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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