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Processing method for regenerative semi-chemical corrugated paper

A technology of corrugated base paper and processing methods, which is applied in the process of adding pulp raw materials, papermaking, adding reinforcing agents, etc., can solve the problems of not being suitable for medium-scale production, large investment, etc., and achieve the goal of improving physical strength, good effect, and reducing production costs. Effect

Inactive Publication Date: 2004-09-01
ZHEJIANG BLUESTAR HLDG GRP
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Problems solved by technology

However, this process requires a large investment and is not suitable for medium-scale production

Method used

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Experimental program
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Embodiment Construction

[0031] 1. Ingredients: Mix 11# imported waste paper from Japan, 11# imported waste paper from the United States, and old domestic cardboard boxes according to the ratio of (30-40%): (10-15%): (60-45%), from the chain Board feeding.

[0032] 2. Pulverization: The mixed waste paper composed of imported waste paper and domestic waste paper is pulverized in a hydraulic pulper, and the disintegration concentration is controlled at 3.5-4.5%.

[0033] 3. High-consistency sand removal: remove iron, sand, staples, glass and other heavy impurities through a high-concentration sand remover. Control the slurry concentration of 3 to 3.5%, and the pressure difference between the inlet and outlet to be 0.1 to 0.15Mpa.

[0034] 4. Fiber separation: through the compound fiber separator, the pulp is crushed and de-sanded twice, and the light and heavy impurities in the pulp are removed. Control the slurry concentration of 3 to 3.5%, the slurry inlet pressure of 0.15 to 0.25Mpa, and the outlet...

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Abstract

The invention is a regenerated corrugated raw paper manufacturing method, its main technical flows: mix import waste paper with internal waste paper, pulp by pulping engine, desand by high concentration desander, screen by fiber separator, desand by high concentration desander, screen by low concentration pressure sieve, desand by low concentration desander, condense by condenser, mill and pulp by medium concentration hydraulic disc, screen by pressure sieve, make by paper machine and spray papermaking chemical assistant when molding and cut by winder. The added quantity of import waste paper is 40-55% of total weight of the mixed waste paper. It changes traditional low concentration pulping technique. The technique is designed reasonably, and can effectively heighten the physical strength of the regenerated corrugated raw paper, reduce the raw material cost and be applied to medium-scale production.

Description

technical field [0001] The invention relates to a processing method of recycled corrugated base paper, and belongs to the technical field of the manufacture of recycled paper in the papermaking industry. Background technique [0002] The existing corrugated base paper production lines using waste paper as raw materials are mainly divided into three types according to the production scale, and their processes and characteristics are also different. [0003] The traditional process is: waste cardboard, hydropulper disintegration, sand removal in sand sink, centrifugal sieve desander, thickener concentration, 450 double-disc mill beating, low-consistency desander desander, rotor screen screening, Paper machine copying, rewinding machine slitting, finished products. The characteristics of this process are: 1. Small production scale and small investment; 2. Outdated technology; 3. Low product quality and cannot be used on corrugated paper production lines a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21H21/18D21H23/24
Inventor 梁敖法徐建灿单苗夫娄立江
Owner ZHEJIANG BLUESTAR HLDG GRP
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