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Starch composition, preparation method thereof and pulp using the starch composition

A technology of composition and starch, which is applied in the direction of non-fibrous pulp addition, fiber raw material treatment, retention aid addition, etc., can solve the problems of retention and drainage, and paper strength is not obvious, so as to improve pulp retention and The effects of water filtration performance, burst resistance index improvement, and ash retention improvement

Active Publication Date: 2014-04-23
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure cationic etherification modification of starch has no obvious effect on further improving retention and drainage and paper strength.

Method used

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  • Starch composition, preparation method thereof and pulp using the starch composition
  • Starch composition, preparation method thereof and pulp using the starch composition
  • Starch composition, preparation method thereof and pulp using the starch composition

Examples

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preparation example Construction

[0017] The preparation method of this modified starch composition, it comprises the steps:

[0018] (1) Take a certain amount of guar gum and raw starch, add water and mix evenly to form a starch-guar gum mixture, wherein the dry weight of the guar gum is 1.0%-3.0% of the dry weight of the raw starch. The solid content of the starch-guar gum mixture is 20%-40%.

[0019] The native starch may preferably be at least one of tapioca starch, corn starch, potato starch, and wheat starch, but not limited to the above-mentioned several, as long as it is native starch. The order of adding the guar gum and the original starch is not limited, it can be that the original starch is added first and then the guar gum is added, or the guar gum is added first and then the original starch is added, or the guar gum and the original starch are mixed together and added to the water .

[0020] Guar gum and starch are a two-phase system. From the perspective of its chemical structure, guar gum has...

Embodiment 1

[0042] Weigh 9g guar collagen powder (moisture content 12%), add it into 577g water under stirring state, after being uniformly dispersed, continue to add 300g tapioca starch (moisture content 14%) and stir evenly to obtain a concentration of 30% starch and Guar gum mixture. Add 15.5g of NaCl expansion inhibitor to the uniformly dispersed above mixed solution, stir evenly, then add 3-chloro-2-hydroxypropyltrimethylammonium chloride preactivated by 25% sodium hydroxide solution solution (concentration is 70%), wherein the sodium hydroxide solution consumption is 15.9g, the etherification agent 3-chloro-2-hydroxypropyltrimethylammonium chloride solution consumption is 38.0g, after stirring at room temperature for 30min, the temperature is raised to React at 40°C for 10h. After the reaction is over, add a certain amount of water to dilute the above mixed solution to a concentration of 5%, and then add 152g of sodium silicate aqueous solution to the diluted solution (the effectiv...

Embodiment 2

[0044] Weigh 6g of guar collagen powder (moisture content 12%), add it into 352g of water under stirring, after being uniformly dispersed, continue to add 300g of tapioca starch (moisture content 14%) and stir evenly to obtain a concentration of 40% starch and Guar gum mixture. Add 10.3g of Na to the uniformly dispersed above mixed solution 2 SO 4 Swelling inhibitor, stir evenly, then add glycidyltrimethylammonium chloride solution (concentration is 70%) preactivated by 30% sodium hydroxide solution, wherein the sodium hydroxide solution consumption is 8.8g, ether The dosage of the oxidation agent glycidyltrimethylammonium chloride solution was 18.8 g, and after stirring at room temperature for 30 min, the temperature was raised to 55° C. for 8 h. After the reaction, add a certain amount of water to dilute the above mixed solution to a concentration of 4%, and then add 75.2g of sodium silicate aqueous solution to the diluted solution (the effective concentration of sodium si...

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Abstract

The invention provides a modified starch composition used in the paper-making field. The modified starch composition comprises reaction products by mixing guar gum, an etherified modified compound of starch, a metal silicate and water, wherein the etherified modified compound of starch is an etherified modified compound of original starch and a cationic etherifying agent pre-activated by an alkaline catalyst, the mass of the cationic etherifying agent in the cationic etherifying agent pre-activated by the alkaline catalyst is 5%-15% of the total dry mass of the original starch and the guar gum, the mass of the alkaline catalyst is 1.0%-2.0% of the total dry mass of the original starch and the guar gum; the dry mass of the guar gum is 1.0%-3.0% of the dry mass of the original starch, and the dry mass of the metal silicate is 10%-30% of the total dry mass of the original starch and the guar gum. The invention also provides a preparation method of the modified starch composition and pulp using the modified starch composition. The modified starch composition can effectively improve the retention and drainage properties of the pulp.

Description

technical field [0001] The invention relates to a modified starch composition used in the field of papermaking, a preparation method thereof, and a slurry using the modified starch composition. Background technique [0002] In the paper industry, the dehydration speed and retention effect of the pulp on the forming wire are very important, which will ultimately determine many properties of the paper. If the slurry retention performance is poor, a large number of fine fibers and fillers will be lost into the circulation system of the paper machine with the water, and will accumulate in the circulating white water, resulting in white water pollution or even sediment accumulation, polluting the felt. At the same time, the specific surface area of ​​fine fibers and fillers is larger than that of fibers, and it is easier to absorb other chemical additives added to the slurry, resulting in a certain cost loss and a decline in paper-making performance; the poor drainage performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/28D21H17/32D21H21/10D21H21/18C08B31/12
Inventor 王仁荣张明李俊王春雁
Owner GOLD EAST PAPER JIANGSU
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