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Coating biological latex, precoating paint and preparation method of precoating paint

A bio-latex and coating technology, which is applied in the field of papermaking coatings, can solve the problems of layered and foamed paper, adverse effects on the operation performance of large-scale high-speed paper machines, and low strength of bio-latex, achieving surface strength improvement, good water retention, and low cost effect

Active Publication Date: 2018-10-19
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-speed coatings include pre-coating, mid-coating and top-coating. Pre-coating is an important layer of high-speed coating. However, the strength of bio-latex in existing pre-coatings is low, resulting in paper delamination. The foaming problem is serious, and it also has a negative impact on the printing effect of the paper, and has a negative impact on the running performance of large high-speed paper machines, and its rheological properties and water retention properties need to be improved

Method used

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  • Coating biological latex, precoating paint and preparation method of precoating paint
  • Coating biological latex, precoating paint and preparation method of precoating paint

Examples

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Embodiment 1

[0023] A biological latex for coating, comprising the following raw materials in parts by weight: 100 parts by weight of starch, 0.005 parts of mesophilic amylase and 0.01 part of biological intermediates; wherein, the biological intermediates include the following raw materials in parts by weight: methylene succinic acid 20 part, 50 parts of polypropylene glycol and 6 parts of hydrogen peroxide; The volume concentration of described hydrogen peroxide is 12%;

[0024] The preparation method of described biological latex comprises the following steps:

[0025] (1) According to the above weight ratio, the starch and water are mixed and stirred evenly to obtain the starch water slurry;

[0026] (2) adding the starch water slurry to a medium-temperature amylase, and pumping it into a constant temperature reaction tank for gelatinization reaction;

[0027] (3) Pump the starch water slurry after the gelatinization reaction to the digester for instant inactivation, and keep warm in ...

Embodiment 2

[0032] A biological latex for coating, comprising the following raw materials in parts by weight: 100 parts of starch, 0.05 parts of medium temperature amylase, 30 parts of glycerol, 10 parts of ethylene glycol and 30 parts of biological intermediates; wherein, the biological intermediates include The following raw materials in parts by weight: 5 parts of methylene succinic acid, 30 parts of polypropylene glycol and 4 parts of hydrogen peroxide, wherein the volume concentration of the hydrogen peroxide is 8%;

[0033] The preparation method of described biological latex comprises the following steps:

[0034] (1) According to the above weight ratio, ethylene glycol and glycerol are mixed with water and stirred, then starch is added, and stirred evenly to obtain starch water slurry;

[0035] (2) adding the starch water slurry to a medium-temperature amylase, and pumping it into a constant temperature reaction tank for gelatinization reaction;

[0036] (3) Pump the starch water...

Embodiment 3

[0041] A biological latex for coating, comprising the following raw materials in parts by weight: 100 parts of starch, 0.01 part of medium temperature amylase, 20 parts of glycerol, 5 parts of ethylene glycol and 20 parts of biological intermediates; wherein, the biological intermediates include The following raw materials in parts by weight: 10 parts of methylene succinic acid, 40 parts of polypropylene glycol and 5 parts of hydrogen peroxide; the volume concentration of the hydrogen peroxide is 10%;

[0042] The preparation method of described biological latex comprises the following steps:

[0043] (1) According to the above weight ratio, ethylene glycol and glycerol are mixed with water and stirred, then starch is added, and stirred evenly to obtain starch water slurry;

[0044] (2) adding the starch water slurry to a medium-temperature amylase, and pumping it into a constant temperature reaction tank for gelatinization reaction;

[0045] (3) Pump the starch water slurry ...

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Abstract

The invention provides coating biological latex, precoating paint and a preparation method of precoating paint. The biological latex is prepared from the following raw materials of starch, amylase anda biological intermediate, wherein the biological intermediate is prepared from the following raw materials of itaconic acid, polypropylene glycol and hydrogen peroxide. Compared with the existing paint, the precoating paint prepared by the biological latex disclosed by the invention has a good rheological property and a better water retention capacity; furthermore, the precoating paint has lowerand stabler high shear viscosity, so that a large high-speed paper machine has good operation performance. In addition, after the precoating paint disclosed by the invention is coated, the physical property of finished paper is obviously improved; IGT of the finished paper is remarkably improved, water resistance of the finished paper is obviously improved, and coated paper has better printing performance. The coated paper is suitable for a high-speed printing machine, layering and bubbling in a printing process are avoided, and the light spot phenomenon after printing is avoided.

Description

technical field [0001] The invention relates to the technical field of papermaking coatings, in particular to a biological latex for coating, a precoating coating and a preparation method thereof. Background technique [0002] High-speed coatings include pre-coating, mid-coating and top-coating. Pre-coating is an important layer of high-speed coating. However, the strength of bio-latex in existing pre-coatings is low, resulting in paper delamination. The foaming problem is serious, and it also has a negative impact on the printing effect of the paper, and has a negative impact on the running performance of large high-speed paper machines, and its rheological properties and water retention properties need to be improved. Therefore be badly in need of a kind of biological latex for coating and precoat coating, solve the above-mentioned technical problem. Contents of the invention [0003] In view of this, the present invention proposes a biological latex for coating, a pre-...

Claims

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Application Information

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IPC IPC(8): D21H23/56
CPCD21H23/56
Inventor 刘历鹏翁浥程邵治涛
Owner HAINAN JINHAI PULP & PAPER
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