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Papermaking method

A paper and pulp technology, which is applied in the field of papermaking and papermaking using active calcium silicate as a paper-making filler, can solve the problems of increased consumption of papermaking additives, increased paper lint and powder loss, and increased production costs. Improve the quality of paper products, reduce production costs, and increase the effect of filling

Inactive Publication Date: 2017-08-18
DATANG INT HIGH ALUMINA COAL R & D CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, because active calcium silicate has the characteristics of porous and strong adsorption, it is easy to absorb a large amount of papermaking additives, so in the paper production process, with the increase of the amount of active calcium silicate, the consumption of papermaking additives also increases. , thereby increasing production costs
Moreover, using the traditional filling method, in the case of high filling of active calcium silicate, the binding force between it and the fiber is poor, which increases the risk of paper hair loss and powder loss. Therefore, active calcium silicate is currently used as the filling method. Papermaking fillers, the amount of which usually does not exceed 20%

Method used

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  • Papermaking method

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Embodiment 1

[0028] The present embodiment provides a kind of method of papermaking, specifically comprises the following steps:

[0029] 1. Preparation of fly ash desiliconization solution

[0030] Add fly ash with a silicon dioxide content of about 40wt% to a sodium hydroxide solution with a concentration of 16wt% to carry out desiliconization reaction, control the desiliconization reaction temperature to about 120°C, and the desiliconization reaction time is about 2h, and then The obtained slurry is subjected to solid-liquid separation, and the obtained liquid product is collected, which is the fly ash desiliconization liquid, wherein the concentration of sodium silicate is about 50 g / L.

[0031] 2. Preparation of composite slurry

[0032] Use bleached softwood pulp with a beating degree of 65°SR as the first pulp, add the first pulp to the above-mentioned fly ash desiliconization solution, mix thoroughly and soak for about 20 minutes, then add lime milk with a CaO concentration of abo...

Embodiment 2

[0038] The present embodiment provides a kind of paper making method, comprises the following steps:

[0039] 1. Preparation of fly ash desiliconization solution

[0040] Add fly ash with a silicon dioxide content of about 40wt% to a sodium hydroxide solution with a concentration of 16wt% to carry out desiliconization reaction, control the desiliconization reaction temperature to about 120°C, and the desiliconization reaction time is about 2h, and then The obtained slurry is subjected to solid-liquid separation, and the obtained liquid product is collected, which is the fly ash desiliconization liquid, wherein the concentration of sodium silicate is about 50 g / L.

[0041] 2. Preparation of composite slurry

[0042] Use bleached softwood pulp with a beating degree of 70°SR as the first pulp, add the first pulp to the above-mentioned fly ash desiliconization solution, mix thoroughly and soak for about 20 minutes, then add lime milk with a CaO concentration of about 160g / L Reac...

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Abstract

The invention provides a paper making method, comprising: using sodium silicate solution to infiltrate the first paper pulp, then adding milk of lime and a catalyst to react, and controlling the calcium-silicon ratio in the reaction system to be 0.6-0.9, after the reaction is completed , adjusting the pH value of the reaction product to 9-11 to obtain a composite slurry; adding the above composite slurry to the second pulp to form a papermaking system, and papermaking is performed on the papermaking system. The papermaking method provided by the invention solves the problems of high consumption of active calcium silicate plus filling paper chemical additives and easy lint and powder loss in the existing paper, improves the quality of paper products, and further improves the application of active calcium silicate in papermaking technology.

Description

technical field [0001] The invention relates to a papermaking method, in particular to a papermaking method using active calcium silicate as a papermaking filler, and belongs to the technical field of papermaking. Background technique [0002] Activated calcium silicate is an excellent raw material for papermaking and can be used as a papermaking filler in paper production. In the papermaking process, adding active calcium silicate can significantly increase the ash content of paper, improve paper performance, and reduce production costs. Therefore, the use of active calcium silicate in papermaking has significant economic and social benefits. [0003] However, because active calcium silicate has the characteristics of porous and strong adsorption, it is easy to absorb a large amount of papermaking additives, so in the paper production process, with the increase of the amount of active calcium silicate, the consumption of papermaking additives also increases. , thereby incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/00D21H17/69D21H19/68
CPCD21F11/00D21H17/69D21H19/68
Inventor 王成海孙俊民魏晓芬陈杨徐鹏高志军
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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