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Production method for high-grey-specification and high-thickness grey board

A production method and technology of gray cardboard, applied in the field of pulp and paper making, can solve the problems of unstable stiffness and low ash content of gray board paper, and achieve significant economic benefits, low power consumption per ton of pulp, and reduced consumption

Active Publication Date: 2016-11-09
LIANSHENG PAPER IND LONGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For this reason, it is necessary to provide a production method of gray paperboard with high ash content and high thickness, which is used to solve the problems of low ash content, unstable thickness, tightness and stiffness of gray board paper

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for producing high-ash and high-thickness grey cardboard of the present invention comprises the following steps:

[0046] Pulp preparation:

[0047] Using waste containerboard as raw material, OCC pulp is obtained through conventional OCC pulping line feeding, disintegration, slag removal, screening, concentration, refining, and pulp storage process;

[0048] Using waste newspaper as raw material, through conventional ONP pulp line feeding, disintegration, slag removal, screening, concentration, thermal dispersion, pulp storage and other processes to obtain ONP pulp;

[0049] Using branch wood chips as raw materials, wood chip pulp is obtained through the process of wood chip pulp preparation line feeding, wood chip thermal grinding, refining, screening, concentration, and pulp storage. The weight ratio is 100:1:20 to form a mixture, and the culture is carried out under the following conditions: the temperature is 30 ° C, the time is 10 days, and the binder is...

Embodiment 2

[0076] The difference between the second embodiment and the first embodiment is that the wood chips are used as raw materials, and the wood chips pulp is obtained through the process of feeding the wood chip pulp preparation line, wood chip thermal grinding, refining, screening, concentration, and pulp storage. , Hansenula genus microorganisms and a binder are mixed in a weight ratio of 100:1:20 to form a mixture, and cultured under the following conditions: temperature 40 ° C, time 6 days, the binder is carboxymethyl cellulose, One of sodium carboxymethyl cellulose, sodium carboxymethyl starch or starch;

[0077] Pulp mix:

[0078] After the ONP slurry is thickened in the surface layer mixing tank and the surface layer front copying tank, it is sent to the surface layer flow section for dilution and screening before the screen, and then goes to the surface layer headbox to distribute the pulp on the Internet, as the grayboard paper lining layer;

[0079] OCC pulp, wood chip ...

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Abstract

The invention relates to a production method for a high-grey-specification and high-thickness grey board. The production method comprises the steps of sizing agent preparation, sizing agent mixing and papermaking, wherein in sizing agent preparation, an OCC sizing agent, an ONP sizing agent, a sawdust sizing agent and a recovery sizing agent are prepared, and Hasun saccharomyces microorganisms and an adhesion agent are added into the sawdust sizing agent; in sizing agent mixing, the ONP sizing agent is used for making a grey board face layer, and the OCC sizing agent, the sawdust sizing agent mixture and the recovery sizing agent are mixed according to proportions to form a grey board liner, a grey board core layer and a grey board bottom layer; in papermaking, the sizing agents are dewatered through a net part to be shaped, the face layer, the liner, the core layer and the bottom layer are composited, a pressing part is used for squeezing and dewatering, a drying part is used for carrying out drying, and then paper is made. Microbial culture is carried out on the sawdust sizing agent, the surface chemical performance and the pore structure of the sawdust sizing agent are modified, and the thickness, the tightness and the deflection of the grey board are effectively improved. Low-concentration tailings at the tail section of an OCC line are recycled, the benefits of environmental protection are remarkable, and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of pulp and paper production, in particular to a method for producing high-ash and high-thickness grey cardboard. Background technique [0002] The ash content of gray board has a great influence on the main quality indicators of gray board, such as quantitative, thickness, tightness and stiffness. Under the same quantification, when the ash content increases, the thickness and stiffness decrease, and the tightness increases. The traditional technology uses OCC waste paper pulp as the lining bottom pulp and ONP waste paper pulp as the surface layer. In order to achieve the required thickness, tightness and stiffness indicators, the ash content of the finished paper is controlled at a low level, generally 11-12%. Due to the limitation of production technology and quality indicators, the goal of increasing the ash content of the finished paper and reducing the production cost cannot be achieved. [0003] In ...

Claims

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Application Information

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IPC IPC(8): D21F11/00D21C5/00D21C11/00
CPCD21C5/005D21C11/00D21F11/00
Inventor 王贵敏陈光军覃本春李浩
Owner LIANSHENG PAPER IND LONGHAI
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