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A modified starch for papermaking coating and sizing with high smoothness

A smoothness and modification technology, which is applied in papermaking, paper coating, textiles and papermaking, etc., can solve the problems of large environmental damage and achieve the effects of good printing adaptability, high smoothness and high surface strength

Active Publication Date: 2018-11-30
长兴锦龙纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the modified starch uses a large amount of chemical substances such as strong alkali, which is very harmful to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A modified starch for papermaking coating and sizing with high smoothness, which is prepared by the following method:

[0021] (1) Preparation of starch suspension:

[0022] Fully grind the cornstarch and pass through a 200-mesh sieve, add it into purified water, and stir continuously with a stirrer to form a suspension with a mass fraction of 28%;

[0023] (2) Preparation of enzyme solution:

[0024] According to the following parts by weight, take 3 parts of stachyose, 0.5 part of laccase, 0.5 part of alkaline pectinase, 0.1 part of amylase, 0.2 part of cellulase, and 100 parts of water to prepare an enzyme solution;

[0025] (3) Modification treatment:

[0026] Maintain a constant temperature of 38°C, add the enzyme solution dropwise to the starch suspension at a weight ratio of 1:50, stir continuously for 45 minutes with a stirrer, and finally heat to 80°C for 5 minutes;

[0027] (4) Microwave radiation treatment:

[0028] After enzyme modification treatment, ir...

Embodiment 2

[0033] A modified starch for papermaking coating and sizing with high smoothness, which is prepared by the following method:

[0034] (1) Preparation of starch suspension:

[0035] Fully grind the cornstarch and pass through a 200-mesh sieve, add it into purified water, and stir continuously with a stirrer to form a suspension with a mass fraction of 35%;

[0036] (2) Preparation of enzyme solution:

[0037] According to the following parts by weight, take 2 parts of stachyose, 0.5 part of laccase, 0.8 part of alkaline pectinase, 0.1 part of amylase, 0.2 part of cellulase, and 100 parts of water to prepare an enzyme solution;

[0038] (3) Modification treatment:

[0039] Maintain a constant temperature of 38°C, add the enzyme solution dropwise to the starch suspension at a weight ratio of 1:50, stir continuously for 35 minutes with a stirrer, and finally heat to 80°C for 5 minutes;

[0040] (4) Microwave radiation treatment:

[0041] After enzyme modification treatment, ir...

Embodiment 3

[0046] A modified starch for papermaking coating and sizing with high smoothness, which is prepared by the following method:

[0047] (1) Preparation of starch suspension:

[0048] Fully grind the cornstarch and pass through a 200-mesh sieve, add it into purified water, and stir continuously with a stirrer to form a suspension with a mass fraction of 29%;

[0049] (2) Preparation of enzyme solution:

[0050] According to the following parts by weight, take 3 parts of stachyose, 0.5 part of laccase, 0.6 part of alkaline pectinase, 0.1 part of amylase, 0.2 part of cellulase, and 100 parts of water to prepare an enzyme solution;

[0051] (3) Modification treatment:

[0052] Maintain a constant temperature of 38°C, add the enzyme solution dropwise to the starch suspension at a weight ratio of 1:50, stir continuously for 44 minutes with a stirrer, and finally heat to 80°C for 5 minutes;

[0053] (4) Microwave radiation treatment:

[0054] After enzyme modification treatment, ir...

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Abstract

The invention discloses high-smoothness modified starch for coating and gluing during papermaking. The modified starch is prepared according to the steps of 1, preparing starch suspension, wherein corn starch is fully ground and sieved with a 200-mesh sieve, added to purified water, and stirred with a stirrer constantly to form the suspension with mass fraction of 28-35%; 2, preparing an enzyme solution, wherein lupeose, lupeose, alkaline pectinase, amylase, cellulose and water are adopted to prepare the enzyme solution; 3, conducting modification, wherein temperature is maintained at 38 DEG C, the enzyme solution is added to the starch suspension dropwise according to the weight ratio of 1:50, stirring is conducted constantly with the stirrer for 35-45 min, and finally temperature is increased to 80 DEG C for treatment lasting 5 min; 4, conducting microwave radiation treatment, wherein 300w microwave is adopted for radiation lasting 10-12 min after enzyme modification; 5, conducting rinsing with clear water after microwave radiation treatment, and conducting drying at 80 DEG C.

Description

technical field [0001] The invention relates to a modified starch for high-smoothness papermaking coating and sizing, and belongs to the technical field of papermaking. Background technique [0002] With the rapid development of the modern paper industry, new processes, new equipment and new technologies are constantly being adopted, and the requirements for modified starch for paper coating and sizing are getting higher and higher, and a single modified starch is difficult to meet the needs. Therefore, Compound modified starch came into being, and its application in the paper industry has been affirmed. [0003] The prior art discloses a TB-201 modified starch, which is a compound modified starch obtained through two chemical denaturations. Due to the introduction of various active groups into the starch molecules, the gelatinization temperature, rheological properties, and stability of the starch are improved. Properties such as film-forming property and adhesiveness have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/14C12P19/14C12P19/04
CPCC12P19/04C12P19/14D21H19/14
Inventor 汤智龙
Owner 长兴锦龙纸业有限公司
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