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Method for preparing high-strength corrugated paper from recycled waste paper

A corrugated, high-strength technology, used in papermaking, textiles and papermaking, pulping with acid salts/acid anhydrides, etc., can solve problems such as troublesome production and product quality, poor water filtration performance, and impact on finished product quality, and achieve low cost. , good strength, the effect of increasing strength

Inactive Publication Date: 2018-04-03
GUANGDONG SONGYANG RECYCLE RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although waste paper recycling technology has tended to be successful, there are still many problems in waste paper recycling
For example, due to the secondary reuse of fibers, the strength and binding force of the fibers are reduced, and the water filtration performance is not good, etc., which have a great impact on the operation of the paper machine and the quality of the finished product.
In addition, in the recycling process of waste paper, the existence of impurities and stickies also brings more troubles to production and product quality.
[0004] Therefore, the use of recycled waste paper to prepare corrugated paper faces the problem of low product strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method of recycling waste paper to prepare high-strength corrugated paper, comprising the following steps:

[0027] S1: Take 1000 parts of waste corrugated paper and 150 parts of water, and put the waste and old corrugated paper into a hydropulper to disintegrate;

[0028] S2: Coarse screening: send the waste paper pulp disintegrated in step S1 to the slag remover, remove heavy impurities, and enter the pressure screen for screening;

[0029] S3: fine sieve: After diluting the waste paper pulp sieved by the coarse sieve in step S2 with 5000 parts of water, enter the deslagging device to remove light impurities, then pass through the pressure sieve and concentrate;

[0030] S4: Add 1 part of phosphoric acid and stir evenly;

[0031] S5: The slurry enters the headbox, and 1.5 parts of carboxymethyl cellulose and 1.2 parts of polyacrylamide are added;

[0032] S6: Send the slurry after adding carboxymethyl cellulose and polyacrylamide to a paper machine for paper makin...

Embodiment 2

[0034] A method of recycling waste paper to prepare high-strength corrugated paper, comprising the following steps:

[0035] S1: Take 1000 parts of waste corrugated paper and 200 parts of water, and put the waste and old corrugated paper into a hydropulper to disintegrate;

[0036] S2: Coarse screening: send the waste paper pulp disintegrated in step S1 to the slag remover, remove heavy impurities, and enter the pressure screen for screening;

[0037] S3: fine sieve: After diluting the waste paper pulp sieved by the coarse sieve in step S2 with 5000 parts of water, enter the deslagging device to remove light impurities, then pass through the pressure sieve and concentrate;

[0038] S4: Add 1.5 parts of phosphoric acid and stir evenly;

[0039] S5: The slurry enters the headbox, and 2 parts of carboxymethyl cellulose and 1.5 parts of polyacrylamide are added;

[0040] S6: Send the slurry after adding carboxymethyl cellulose and polyacrylamide to a paper machine for paper maki...

Embodiment 3

[0042] A method of recycling waste paper to prepare high-strength corrugated paper, comprising the following steps:

[0043] S1: Take 1000 parts of waste corrugated paper and 200 parts of water, and put the waste and old corrugated paper into a hydropulper to disintegrate;

[0044] S2: Coarse screening: send the waste paper pulp disintegrated in step S1 to the slag remover, remove heavy impurities, and enter the pressure screen for screening;

[0045] S3: fine sieve: After diluting the waste paper pulp sieved by the coarse sieve in step S2 with 5000 parts of water, enter the deslagging device to remove light impurities, then pass through the pressure sieve and concentrate;

[0046] S4: Add 0.5 parts of phosphoric acid and stir evenly;

[0047] S5: the slurry enters the headbox, and 3 parts of carboxymethyl cellulose and 1 part of polyacrylamide are added;

[0048] S6: Send the slurry after adding carboxymethyl cellulose and polyacrylamide to a paper machine for paper making ...

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PUM

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Abstract

The invention discloses a method for preparing high-strength corrugated paper from recycled waste paper. The method sequentially includes the following steps of S1, pulping the recycled waste paper through a hydrapulper and then removing impurities; S2, conducting screening through a pressure screen and then adding phosphoric acid to be evenly stirred; S3, making pulp in the step S2 enter a pulp flowing box and adding carboxymethyl cellulose and retention aid; S4, conveying the pulp obtained in the step S3 to a paper machine to manufacture paper with pulp to obtain corrugated crude paper. In the waste paper pulping process, phosphoric acid is added first, then carboxymethyl cellulose is added, the viscosity of cellulose in the pulp is improved, the content of cellulose is improved, the retention aid is added in the pulping process, no other processing aids such as a dispersing agent, a flocculating agent, a surface sizing agent and a defoaming agent need to be added any more, the product is good in strength and high in quality, the processing technology is simple, added aids are few, and cost is lower.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a method for preparing high-strength corrugated paper from recycled waste paper. Background technique [0002] With the development of the Internet, online shopping has become one of the main ways for people to shop. Therefore, the use of packing boxes is also increasing. Because of its multi-layer structure and good strength, corrugated boxes are more widely used in packaging and transportation, especially in the transportation of heavy goods, and they generate more waste paper. At present, my country's paper industry is facing the big problems of raw material shortage and energy shortage. The recycling of waste paper provides an effective way to solve the big problems faced by my country's paper industry. [0003] Although the technology of waste paper recycling has been achieved, there are still many problems in waste paper recycling. For example, due to the seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/34D21C3/04B31F1/20
CPCB31F1/20D21B1/345D21C3/04
Inventor 王壮鹏蔡建涛
Owner GUANGDONG SONGYANG RECYCLE RESOURCES
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