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Paper sheet surface sizing starch glue and processing method thereof

A technology of surface sizing and processing method, applied in the field of starch glue, can solve the problems of crystallization of starch glue particle solution and poor storage viscosity stability, and achieve the effects of being beneficial to the reuse of white water, improving the binding force and reducing the number of broken ends.

Active Publication Date: 2017-06-20
WUHAN SUNHY BIOLOGICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a starch glue for paper surface sizing, the starch glue is of good quality, can solve the problems of crystallization of starch colloid solution and poor stability of storage viscosity, and can meet the printing quality requirements of commonly used printing paper

Method used

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  • Paper sheet surface sizing starch glue and processing method thereof

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Effect test

Embodiment 1

[0029] Water and starch are added into the glue boiling pot and mixed to obtain a starch liquid, wherein the mass percentage of the starch in the starch liquid is 25%. Then, a starch complex enzyme containing α-amylase, β-amylase, glycerol and salt in a weight ratio of 50:5:10:2 was added to the above-mentioned starch liquid, and heated at 65° C. for 20 minutes to obtain a starch gel. Taste. Among them, the weight ratio of starch compound enzyme to starch is 0.01:100, the enzyme activity of α-amylase is 3000U / mL, and the enzyme activity of β-amylase is 900U / mL.

[0030] Then, under the condition of 95° C., the primary product of starch glue was subjected to an enzyme-inactivating treatment for 15 minutes. Next, add a starch glue reinforcing agent with a weight ratio of 100:0.5 to the starch glue product after deactivating the enzyme, adjust the pH of the glue solution after mixing, and obtain a paper surface sizing with a pH of 8.0 and a viscosity of 10 MPa·s. starch glue. ...

Embodiment 2

[0032] Water and starch are added into the glue boiling pot according to the order of water first and then starch, and mixed to obtain starch liquid, wherein the mass percentage of starch in the starch liquid is 30%. Then, a starch complex enzyme containing α-amylase, β-amylase, glycerol and salt in a weight ratio of 65:10:20:5 was added to the above starch liquid, and heated at 75°C for 15 minutes to obtain a starch gel. Taste. Among them, the weight ratio of starch compound enzyme to starch is 0.03:100, the enzyme activity of α-amylase is 4000U / mL, and the enzyme activity of β-amylase is 1000U / mL.

[0033] Then, under the condition of 100°C, the primary product of starch glue was subjected to an enzyme-inactivating treatment for 12 minutes. Next, add a starch glue reinforcing agent with a weight ratio of 100:1 to the starch glue product after deactivation, adjust the pH of the glue solution after mixing and dilute with water to obtain a paper surface with a pH of 8.5 and a ...

Embodiment 3

[0035] Water and starch are added into the glue boiling pot according to the order of water first and then starch, and mixed to obtain starch liquid, wherein the mass percentage of starch in the starch liquid is 28%. Then add starch complex enzyme containing α-amylase, β-amylase, glycerol and salt in the weight ratio of 57.5:8:15:3.5 to the above starch liquid, and heat at 70°C for 18min to obtain starch gel Taste. Among them, the weight ratio of starch compound enzyme to starch is 0.02:100, the enzyme activity of α-amylase is 3500U / mL, and the enzyme activity of β-amylase is 950U / mL.

[0036] Then, under the condition of 98° C., the primary product of starch glue was treated with enzyme inactivation for 10 minutes. Next, add a starch glue reinforcing agent with a weight ratio of 100:0.8 to the starch glue product after the enzyme is deactivated, adjust the pH of the glue solution after mixing, and dilute with water to obtain a paper sheet with a pH of 7.5 and a viscosity of ...

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Abstract

The invention relates to paper sheet surface sizing starch glue and a processing method thereof and belongs to the field of starch glue. The processing method comprises the steps of mixing starch and water, then adding starch compound enzyme and heating and boiling to obtain a starch glue initial product; deactivating enzyme in the starch glue initial product, adding starch glue enhancer and mixing to obtain the paper sheet surface sizing starch glue. The starch complex enzyme is prepared from alpha-amylase, beta-amylase, glycerinum and salt, and the weight ratio of the alpha-amylase to the beta-amylase to the glycerinum to the salt is (50 to 65):(5 to 10):(10 to 20):(2 to 5). The starch glue enhancer is prepared from hydroxypropyl methyl cellulose, sodium carboxymethyl cellulose, liquid caustic soda and penetrant, and the weight ratio of the hydroxypropyl methyl cellulose to the sodium carboxymethyl cellulose to the liquid caustic soda to the penetrant is (30 to 40):(20 to 30):(2 to 4):(0.5 to 1). The processing method has a simple technology and low production cost and greatly reduces wastewater treatment load in a production process. In addition, the starch glue has good quality, can solve the problems of starch glue colloidal particle solution crystallization and poor storage viscosity stability and meets a requirement of common printing paper.

Description

technical field [0001] The invention relates to the field of starch glue, and in particular to a starch glue for paper surface sizing and a processing method thereof. Background technique [0002] Starch itself is a natural plant product with a wide range of sources, low price and stable supply. At present, there are more than 2,000 deep-processed products using starch as raw material in the world, and modified starch is the second largest variety of starch deep-processing. Oxidized starch is a commonly used modified starch. In the paper industry, hypochlorite or ammonium persulfate is often used to produce oxidized starch. It has the advantages of short cooking time, good paste liquid transparency, and strong adhesion. However, the chemical required for preparation Product residues bring an excessive load to sewage treatment, which is not conducive to the transformation and upgrading of enterprises. Moreover, as the requirements for the surface strength of paper sheets in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
CPCD21H21/16
Inventor 郭卢云詹志春周樱谌颉王冠
Owner WUHAN SUNHY BIOLOGICAL
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