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A dry strength agent for papermaking and its preparation and application method

A technology of dry strength agent and alcohol solvent, which is applied in the direction of strengthening agent addition, etc., can solve the problems of high water retention value, paper is easy to break, and large amount of dry strength agent is used, so as to improve the tensile strength, increase the tensile strength, and fine paper texture Effect

Inactive Publication Date: 2016-03-30
XIAN FUSHIDE CHEM DERIVATIVE
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AI Technical Summary

Problems solved by technology

[0002] In the papermaking process, straw pulp, reed pulp, and waste paper pulp are mainly used as raw materials. These raw materials have the characteristics of high water retention value, high content of miscellaneous cells, and short fibers. The prepared paper is easy to break. At present, most of the paper-making dry strength agents used are native starch or modified starch, which has no obvious effect on increasing the paper strength, and the traditional paper-making dry strength agents use a large amount and must be equipped with corresponding equipment before they can be used. , so it is of great significance to study a paper-making dry strength agent with good effect and convenient use

Method used

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  • A dry strength agent for papermaking and its preparation and application method

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Effect test

Embodiment 1

[0026] Weigh 430kg of cornstarch and 250kg of etherification agent sodium chloroacetate and mix them evenly, put them into the mixer, then add 50kg of soda ash to the mixer, stir for 25min, then add 200kg of caustic soda, react for 30min, add 80kg of ethanol, and the temperature rises to 45 ℃, reacted for 2 hours, dried at 85 ℃, and pulverized to obtain a white powder which is a dry strength agent for papermaking.

Embodiment 2

[0028] Weigh 550kg of cornstarch and 275kg of etherification agent sodium chloroacetate, mix them evenly, put them into the mixer, then add 80kg of soda ash to the mixer, stir for 40min, then add 225kg of caustic soda, react for 45min, add methanol 100kg, and the temperature rises to 55 ℃, reacted for 3 hours, dried at 95 ℃, and pulverized to obtain a white powder which is a dry strength agent for papermaking.

Embodiment 3

[0030] Weigh 650kg of cornstarch and 300kg of etherification agent sodium chloroacetate and mix them evenly, put them into the agitator, then add 100kg of soda ash to the agitator, stir for 60min, then add 250kg of caustic soda, react for 60min, add 110kg of isopropanol, and the temperature rises to 65°C, react for 4 hours, dry and pulverize at 105°C to obtain a white powder which is a dry strength agent for papermaking.

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Abstract

The invention relates to preparation and an application of a papermaking dry strengthening agent. The papermaking dry strengthening agent provided by the invention comprises the following components: corn starch, soda ash, caustic soda, an etherification agent and an alcohol solvent according to the mass ratio of (43-65):(5-10):(20-25):(25-30):(8-11). The papermaking dry strengthening agent provided by the invention is applied in the papermaking industry as a tension strengthening agent, and can significantly improve the tension strength of dry paper, and the paper is exquisite and clear in grains and does not fluff.

Description

technical field [0001] The invention relates to the field of additives in papermaking technology, in particular to the preparation and application of a papermaking dry strength agent. Background technique [0002] In the papermaking process, straw pulp, reed pulp, and waste paper pulp are mainly used as raw materials. These raw materials have the characteristics of high water retention value, high content of miscellaneous cells, and short fibers. The prepared paper is easy to break. At present, most of the paper-making dry strength agents used are native starch or modified starch, which has no obvious effect on increasing the paper strength, and the traditional paper-making dry strength agents use a large amount and must be equipped with corresponding equipment before they can be used. , so it is of great significance to study a paper-making dry strength agent with good effect and convenient use. Contents of the invention [0003] One of the objectives of the present inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/18C08B31/12C08J3/24
Inventor 侯卫东
Owner XIAN FUSHIDE CHEM DERIVATIVE
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