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A method for improving the strength properties of waste paper pulp

A waste paper pulp and strength technology, applied in the post-treatment modification of cellulose pulp, papermaking, paper, etc., can solve problems such as complex operation process, achieve the effect of expanding application field, high compatibility, and simple operation

Active Publication Date: 2021-07-30
ZHEJIANG JINGXING PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object to be achieved by the present invention is to provide a method for improving the strength performance of waste paper pulp, and to solve the technical problem of complex operation process in the existing method

Method used

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Examples

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Effect test

Embodiment 1

[0021] A method for improving the strength performance of waste paper pulp, comprising a deep eutectic solvent and waste paper pulp, the deep eutectic solvent comprising choline chloride and oxalic acid, and the molar ratio of the choline chloride and oxalic acid is 1:2, The mass ratio of described deep eutectic solvent and waste paper pulp is 1%, and the stock concentration of waste paper pulp is equal to 5%, and described method comprises the following steps successively:

[0022] Step 1: Obtain the reaction mixture of the deep eutectic solvent and the waste paper pulp through a constant temperature water bath, the temperature of the constant temperature water bath treatment is 80°C, and the time of the constant temperature water bath treatment is 2h;

[0023] Step 2: Washing and dehydrating the waste paper pulp obtained in Step 1;

[0024] Step 3: The pulp dehydrated in Step 2 is subjected to papermaking treatment.

Embodiment 2

[0026] A method for improving the strength performance of waste paper pulp, comprising a deep eutectic solvent and waste paper pulp, the deep eutectic solvent comprising choline chloride and oxalic acid, and the molar ratio of the choline chloride and oxalic acid is 1:2, The mass ratio of described deep eutectic solvent and waste paper pulp is 1%, and the stock concentration of waste paper pulp is equal to 5%, and described method comprises the following steps successively:

[0027] Step 1: Obtain the reaction mixture of the deep eutectic solvent and the waste paper pulp through a constant temperature water bath, the temperature of the constant temperature water bath treatment is 80 ° C, and the time of the constant temperature water bath treatment is 1 h;

[0028] Step 2: Washing and dehydrating the waste paper pulp obtained in Step 1;

[0029] Step 3: The pulp dehydrated in Step 2 is subjected to papermaking treatment.

Embodiment 3

[0031] A method for improving the strength performance of waste paper pulp, comprising a deep eutectic solvent and waste paper pulp, the deep eutectic solvent comprising choline chloride and oxalic acid, and the molar ratio of the choline chloride and oxalic acid is 1:2, The mass ratio of described deep eutectic solvent and waste paper pulp is 0.5%, and the stock concentration of waste paper pulp is equal to 5%, and described method comprises the following steps successively:

[0032] Step 1: Obtain the reaction mixture of the deep eutectic solvent and the waste paper pulp through a constant temperature water bath, the temperature of the constant temperature water bath treatment is 80°C, and the time of the constant temperature water bath treatment is 2h;

[0033] Step 2: Washing and dehydrating the waste paper pulp obtained in Step 1;

[0034] Step 3: The pulp dehydrated in Step 2 is subjected to papermaking treatment.

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Abstract

The invention relates to a method for improving the strength performance of waste paper pulp, comprising a deep eutectic solvent and waste paper pulp, the deep eutectic solvent includes choline chloride and oxalic acid, and the molar ratio of the choline chloride and oxalic acid is 1 : 2, the ratio of the mass of the deep eutectic solvent to the waste paper pulp is 0.5~1%, the pulp concentration of the waste paper pulp is equal to 5%, and the method comprises the following steps successively: deep eutectic solvent mixing treatment, washing and dehydration treatment , papermaking treatment; advantages of the present invention: the present invention adds a deep eutectic solvent to the waste paper pulp, because the deep eutectic solvent has biocompatibility and biodegradability, and is environmentally friendly, and can generate moisture to fibers Swelling effect, so as to enhance the bonding force between fibers when pulp is made into paper, and achieve the purpose of improving paper strength.

Description

technical field [0001] The invention relates to a method for improving the strength performance of waste paper pulp. Background technique [0002] With the development of society and the improvement of people's living standards, people have higher requirements for the strength performance of paper, especially the boxboard paper used as packaging materials. From the perspective of pulp types, chemical pulp has the best strength performance, and mechanical pulp has the best strength performance. The strength of pulp and chemical mechanical pulp is low. At the same time, due to the shortage of wood resources in our country, secondary fiber is widely used as an important fiber source in the production of containerboard paper. However, after repeated use of waste paper pulp, the fiber damage And keratinization will seriously reduce the strength of the cardboard paper. Therefore, how to improve the strength of the cardboard paper is an important aspect related to the utilization v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21H17/14D21H21/18D21H17/11D21H11/18
CPCD21H11/14D21H11/18D21H17/11D21H17/14D21H21/18
Inventor 刘姗姗丁明其廖昌吕张辉程正柏
Owner ZHEJIANG JINGXING PAPER
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