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Production technology of plasterboard modified starch

A paper-faced gypsum board and modified starch technology, which is applied in the field of production technology of paper-faced gypsum board modified starch, can solve the problems of weak market competitiveness of products, increased cost of production enterprises, small scale of modified starch, etc., and achieves good elasticity. , low cost and energy consumption, good water absorption effect

Inactive Publication Date: 2012-04-11
四川省蓬溪县弘桥实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for the manufacturers of modified starch for gypsum board in most countries, they basically use the traditional wet process to produce modified starch. This process consumes a lot of fresh water, and the waste water produced during the production process has high COD and salt content. Heavy, causing serious pollution problems
Moreover, my country's modified starch production enterprises generally have small scale, outdated equipment, low production technology level, high energy consumption, high production cost, low economic benefits, and weak product market competitiveness.

Method used

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  • Production technology of plasterboard modified starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1,000 parts of raw starch into the mixer, start the stirring motor, spray 25 parts of diluted hydrochloric acid with a concentration of 10% and 20 parts of hydrogen peroxide with a concentration of 10% to 27.5%, stir at room temperature for 10 to 15 minutes, and then After being fully mixed by a high-speed mixer, it is sent to the material inlet of the microwave far-infrared equipment. Adjust the thickness of the material layer to 3-6cm, turn on the microwave far-infrared equipment, adjust the temperature of the material at 50-150°C, and keep it for 10-30 minutes. After the index of 10-12% and viscosity of 2-5mpa.s reaches the required value, put the material into the cooling compounding machine and wait for the temperature to drop below 40°C, spray the concentration at 4%-10% 10 parts of potassium hydroxide solution (containing 5 parts of methanol) are mixed evenly, and then 5-10 parts of microcrystalline cellulose are added, mixed thoroughly for 10-20 minutes, then...

Embodiment 2

[0021] Add 1000 parts of raw starch into the mixer, start the stirring motor, spray 18 parts of diluted hydrochloric acid with a concentration of 12%, 10 parts of ammonium persulfate with a concentration of 12%, stir at room temperature for 10 to 15 minutes, and follow-up procedures are the same as in Example 1 , and finally spray 5-10 parts of sodium hydroxide solution with a concentration of 10% (containing 5 parts of methanol) and mix evenly, then add 6-12 parts of silicon dioxide, mix thoroughly for 10-20 minutes, and then sieve and pack. Obtain the product of the present invention.

Embodiment 3

[0023] Add 1000 parts of raw starch into the mixer, start the stirring motor, then spray 15 parts of diluted sulfuric acid with a concentration of 5%, and 10 parts of hydrogen peroxide with a concentration of 10%, stir at room temperature for 10 to 15 minutes, follow-up procedures and Example 1 Similarly, spray 15 parts of sodium silicate solution with a concentration of 9% at the end, add 12 parts of silicon dioxide after mixing evenly, mix thoroughly for 10 to 20 minutes, then sieve and pack to obtain the product of the present invention.

[0024] The modified starch obtained in the above examples is mainly used in the addition of paper-faced gypsum boards, and its main properties are shown in the table (taking the product standard of a well-known domestic paper-making enterprise as an example)

[0025]

[0026] The results show that the main properties of the gypsum board starch of the present invention meet or exceed the standards and performance requirements specified b...

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Abstract

The invention discloses a production technology of plasterboard modified starch, comprising the following steps of mixing, degeneration reaction, neutralization reaction, physical synergism, screening, weighing and packaging. The invention combines the advantages of various modified starches, has the advantages of strong size film strength, transparency, good water absorption, good dispersion, good gliding property, low gelatinization temperature, strong paste liquid bond force, good adsorbability, easy dissolution, good film forming ability, weak retrogradation, good elasticity, smoothness, flexibility, tough and elastic size film, nontoxicity, tastelessness, safe use, convenient operation, large production scale, little investment, low energy consumption, less pollution, high productionefficiency, stable and reliable product quality and the like and is widely applied to gypsum products.

Description

technical field [0001] The invention relates to a production process of modified starch, more specifically relates to a production process of modified starch for gypsum boards. Background technique [0002] At present, for the manufacturers of modified starch for gypsum board in most countries, they basically use the traditional wet process to produce modified starch. This process consumes a lot of fresh water, and the waste water produced during the production process has high COD and salt content. Heavy, causing serious pollution problems. Moreover, my country's modified starch production enterprises generally have small scale, outdated equipment, low production technology level, high energy consumption, high production cost, low economic benefits, and weak product market competitiveness. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a production process of modified starch for gypsum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/10C08L1/02C08K3/36C08K3/34C08B31/18C04B24/38C04B28/14
Inventor 何世桥钟耕李大勇杨勇
Owner 四川省蓬溪县弘桥实业有限公司
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