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Method for preparation of corrugated paper from straw and waste paper

A technology of corrugated paper and straw, applied in the direction of non-woody plant/crop pulp, secondary cellulose fiber, etc., can solve the problems of inability to produce high-grade paper, single structure, secondary pollution, etc., to reduce pollution and protect the environment performance, and the effect of reducing the cost of papermaking

Inactive Publication Date: 2015-10-21
ZHANGJIAGANG XINFA PACKING
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  • Abstract
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Problems solved by technology

On the other hand, due to the reasons of papermaking technology, the pulp residues produced by enterprises are generally used to manufacture lower-grade paper, which cannot produce high-grade paper. The paper is of low quality, so the pulp residue must be transported to other enterprises for disposal, which is likely to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] 1) Wheat straw pretreatment→softening→microbial decomposition→separation→refining→sieving→wheat straw pulp;

[0019] 2) Disintegration of waste paper → purification and impurity removal of pulp → concentration, aging and medium-consistency refining of pulp → waste paper pulp;

[0020] 3) mixing the straw slurry and the waste paper slurry uniformly at a mass ratio of 1:1.5 to obtain a mixed slurry;

[0021] 4) The mixed slurry passes through the forebay to stabilize the liquid level and slurry concentration, then passes through the white water bucket, the flushing pump, and enters the pressure screen, where fiber bundles and impurities are removed, and then enters the headbox for distribution. Pulp, then dehydrated in the wire section to form a wet paper web, and then press, pre-dry, sizing, post-dry, form a master roll in the roll paper section, and then rewind and cut into products of required specifications;

[0022] In step 1), the wheat straw pretreatment: process ...

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PUM

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Abstract

The invention discloses a method for preparation of corrugated paper from straw and waste paper. The preparation steps include: 1) straw pretreatment, softening, microbial decomposition, dividing, beating and pulp screening to obtain a straw slurry; 2) waste paper breaking, slurry purification and impurity removal, slurry concentration, curing and medium concentration beating, thus obtaining a waste paper slurry; 3) mixing the straw slurry with the waste paper slurry according to a mass ratio of 1:1.1-1.5; and 4) further treating the mixed slurry to obtain a product of required specifications. The method provided by the invention changes the history that original production of high-strength corrugated paper can only use waste paper pulp and / or primary pulp, not only greatly reduces the papermaking cost, but also reduces pollution caused in the pulping process, and has very good environmental protection performance.

Description

technical field [0001] The invention relates to a method for preparing corrugated paper from straw and waste paper, and belongs to the technical field of pulp and papermaking. Background technique [0002] Straw is the main by-product of crops, and it is also an important biological resource. my country is a large agricultural country, and the annual regeneration capacity of straw reaches 600 million tons. Corn stalks, sorghum stalks, cotton stalks and other crop stalks are used as plant raw materials. Due to their own defects such as many leaves and less skin, and the production troubles such as low yield after chemical cooking, corn stalks have been almost used since ancient times. Nothing to do with papermaking. In recent years, due to the improvement of farmers' living standards, plant stalks are neither used for livestock feed nor for heating. A large number of corn stalks are burned during the autumn harvest season, which not only causes a huge waste of resources but ...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21H11/14
Inventor 王正刚
Owner ZHANGJIAGANG XINFA PACKING
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