Preparation method of surface sizing agent for starch-based papermaking

A surface sizing agent, starch-based technology, used in papermaking, textiles and papermaking, paper coatings, etc., can solve the problems of poor mechanical properties and barrier properties of starch-based surface sizing agents

Active Publication Date: 2018-10-26
JURONG MAOYUAN WEAVING FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor mechanical properties and barrier properties of exi

Method used

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  • Preparation method of surface sizing agent for starch-based papermaking

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Embodiment 1

[0016] A preparation method of starch-based papermaking surface sizing agent, comprising the following steps:

[0017] Step 1, in parts by weight, mix 100 parts of cornstarch, 2 parts of amylase and 50 parts of water, heat to 50 ° C, react for 30 minutes, then add 10 parts of formaldehyde, 10 parts of urea, 5 parts of alkaline catalyst, and heat up to 70°C, react for 60 minutes, let cool, and obtain a starch-based copolymer;

[0018] Step 2, in parts by weight, mix 100 parts of corn starch, 3 parts of accelerator, 5 parts of lignin, 5 parts of titanium dioxide particles, 2 parts of carboxymethyl chitosan, and 40 parts of water, heat up to 80°C, and react for 50 minutes , let cool to obtain oxidized cornstarch paste;

[0019] In step 3, the starch-based copolymer obtained in step 1 is mixed with the oxidized corn starch paste obtained in step 2 to obtain the product.

[0020] Wherein, the basic catalyst is potassium hydroxide, the accelerator is potassium persulfate, and the ...

Embodiment 2

[0024] A preparation method of starch-based papermaking surface sizing agent, comprising the following steps:

[0025] Step 1, in parts by weight, mix 100 parts of cornstarch, 3 parts of amylase and 60 parts of water, heat to 55 ° C, react for 30 minutes, then add 15 parts of formaldehyde, 13 parts of urea, 6 parts of alkaline catalyst, and heat up to 75°C, react for 40 minutes, let cool, and obtain a starch-based copolymer;

[0026] Step 2, in parts by weight, mix 100 parts of corn starch, 5 parts of accelerator, 7 parts of lignin, 6 parts of titanium dioxide particles, 3 parts of carboxymethyl chitosan, and 50 parts of water, heat up to 85 ° C, and react for 40 minutes , let cool to obtain oxidized cornstarch paste;

[0027] In step 3, the starch-based copolymer obtained in step 1 is mixed with the oxidized corn starch paste obtained in step 2 to obtain the product.

[0028] Wherein, the basic catalyst is potassium hydroxide, the accelerator is potassium persulfate, and th...

Embodiment 3

[0032] A preparation method of starch-based papermaking surface sizing agent, comprising the following steps:

[0033] Step 1, in parts by weight, mix 100 parts of cornstarch, 3 parts of amylase and 70 parts of water, heat to 60 ° C, react for 30 minutes, then add 17 parts of formaldehyde, 15 parts of urea, 8 parts of alkaline catalyst, and heat up to 80°C, react for 50 minutes, let cool, and obtain a starch-based copolymer;

[0034] Step 2, in parts by weight, mix 100 parts of corn starch, 5 parts of accelerator, 8 parts of lignin, 7 parts of titanium dioxide particles, 4 parts of carboxymethyl chitosan, and 50 parts of water, heat up to 85 ° C, and react for 40 minutes , let cool to obtain oxidized cornstarch paste;

[0035] In step 3, the starch-based copolymer obtained in step 1 is mixed with the oxidized corn starch paste obtained in step 2 to obtain the product.

[0036] Wherein, the basic catalyst is potassium hydroxide, the accelerator is potassium persulfate, and th...

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Abstract

The invention discloses a preparation method of a surface sizing agent for starch-based papermaking. The method comprises the steps that firstly, corn starch, amylase and water are mixed, a heating reaction is conducted, formaldehyde, urea and a basic catalyst are added, a temperature increase reaction is conducted, and a starch-based copolymer is obtained; then, corn starch, an accelerant, lignin, titanium dioxide particles, carboxymethyl chitosan and water are mixed, a temperature increase reaction is conducted, and an oxidized corn starch paste solution is obtained; finally, the starch-based copolymer and the oxidized corn starch paste solution are mixed, and the surface sizing agent is obtained. According to the surface sizing agent, the ring crush compression resistance of paper sheets can be improved, and the water resistance of the paper sheets can also be improved.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a preparation method of a starch-based papermaking surface sizing agent. Background technique [0002] Surface sizing is to apply a sizing solution to the paper surface with a sizing machine or directly immerse in the sizing agent solution to form a layer of rubber particles on the paper or cardboard. After the sizing agent dries, a layer is formed on the paper surface. The liquid-resistant adhesive film makes the paper or cardboard have a certain surface strength and at the same time achieve better water resistance. After surface sizing of paper or cardboard, a layer of water-resistant lamination film is formed on the paper surface, which not only enhances the surface strength of the paper, but also improves the water resistance of the paper, improves the printing performance of the paper, and enhances the durability of the paper. Abrasiveness and durability, whic...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/14C08B31/00
CPCC08B31/00D21H19/14D21H21/16
Inventor 李玉萍史高峰
Owner JURONG MAOYUAN WEAVING FACTORY
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