Production method for reconstructing corrugated core paper by using waste paper and improving pulping process

A technology for corrugated core paper and production method, which is applied in pulp beating/refining method, cellulose raw material pulping, papermaking, etc., can solve the problem of reducing the physical properties of corrugated core paper and corrugated paper, damage to fiber surface, and low utilization rate of pulp and other problems, to achieve the effect of reducing the number of refining times and refining time, low damage and damage, and short time.

Active Publication Date: 2021-04-20
东莞顺裕纸业有限公司
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AI Technical Summary

Problems solved by technology

[0004] Furthermore, repeated processing of the pulp in the pulping process will damage the fibers in the pulp. The fiber breakage rate is generally above 30%, and the fiber surface is severely damaged, which will reduce the quality of the final corrugated medium paper produced and obtained. The physical properties of corrugated paper, in addition, this will lead to a low fiber recovery rate in waste paper, and the high proportion of short fibers in the processed pulp will lead to a high pulp leakage rate during the papermaking process, that is The utilization rate of slurry is low, so it is necessary to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A production method of using waste paper to regenerate corrugated medium paper by improving the pulping and pulping process,

[0025] In the pulping step, the recovered waste paper is put into the pulping barrel for pulping, and the pulp is first discharged from the pulp outlet in the middle and lower part of the pulping barrel to obtain the raw pulp of waste paper, and the heavy slag is discharged through the heavy slag arranged at the bottom of the pulping barrel The heavy slag is discharged from the outlet, the heavy slag is separated from sewage and sludge, the sewage is pumped to the sewage treatment workshop for treatment, and the sludge is pumped to the sludge treatment workshop for treatment;

[0026] In the step of removing impurities, the bottom of the open channel is designed to be inclined, the height of the end of the open channel is lower than the height of the front end of the open channel, the waste paper pulp is pumped to the open channel pulp inlet, and...

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Abstract

The invention discloses a production method for reconstructing corrugated core paper by using waste paper and improving a pulping process. The production method comprises the steps of repulping, impurity removal, coarse grinding treatment, fiber pulp fine selection, fine fiber pulp treatment, tail pulp treatment and the like. Excellent fibers or fine fiber bundles in coarse pulp only subjected to one-time coarse grinding treatment are recovered firstly, fibers accounting for 70% of coarse grinding pulp can be recovered, the fiber extraction speed is high, the time is short, the energy consumption is low, fibers in the recovered fine fiber pulp are damaged to the minimum extent, and the quality of the recovered fibers is improved; and meanwhile, the pulping times and the pulping time are reduced, the production cost is reduced, and the quality of the finally produced corrugated core paper is improved.

Description

technical field [0001] The invention relates to the technical field of a production method for remaking paper using waste paper, in particular to a production method for remaking corrugated medium paper using waste paper that improves the pulping and pulping process. Background technique [0002] At present, manufacturers of corrugated paper, including its corrugated core paper, use waste paper such as waste paper boxes and waste cardboard as raw materials for papermaking. Manufacturers of corrugated paper no longer use raw wood pulp obtained from wood as raw materials for papermaking. The first is to respond to the national The policy is to recycle waste paper, so that waste paper can be recycled, energy saving and environmental protection, and the second is to reduce the cost of papermaking. [0003] In the production process of using waste paper to produce corrugated medium paper again and further making it into corrugated paper, there are many technological steps in the ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): D21F11/12D21B1/34D21B1/32D21D1/30D21D5/02D21C3/22
CPCY02W30/64
Inventor刘伟锋
Owner东莞顺裕纸业有限公司