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Treatment method of papermaking pulp, preparation method of paper and paper

A treatment method and a refining treatment technology, which are applied in pulp beating/refining methods, fiber raw material treatment, papermaking, etc., can solve problems such as reducing the degree of polymerization of cellulose, destroying fiber integrity, and reducing pulp viscosity

Active Publication Date: 2021-01-15
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the biological enzyme modifies the surface of the fiber, it will also cut the molecular chain of cellulose and reduce the degree of polymerization of cellulose, destroying the integrity of the fiber, resulting in a decrease in the viscosity of the pulp.

Method used

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  • Treatment method of papermaking pulp, preparation method of paper and paper
  • Treatment method of papermaking pulp, preparation method of paper and paper
  • Treatment method of papermaking pulp, preparation method of paper and paper

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preparation example Construction

[0065] see image 3 , image 3 It is a schematic flow diagram of an embodiment of the paper preparation method of the present application. Such as image 3 As shown, in this embodiment, the preparation method includes:

[0066] S31: Prepare an unrefined absolute-dry slurry.

[0067] Wherein, absolute dry slurry refers to paddle board.

[0068] In this embodiment, the absolute dry pulp refers to a bleached kraft softwood pulp paddle.

[0069] S32: Dispersing the absolute-dry slurry, and adding a cationic polymer during the dispensing process.

[0070] In this embodiment, the cationic polymer is added while the bleached kraft softwood paddle is being scattered.

[0071] Among them, the cationic polymer includes sodium polyacrylate.

[0072] Wherein, the dosage of the cationic polymer is 100-200 g / ton dry slurry.

[0073] In this embodiment, the concentration of the loose slurry is 3-6%.

[0074] Specifically, when the paddle is scattered, adding sodium polyacrylate can ...

Embodiment 1

[0098] Get bleached kraft coniferous wood paddle board loose pulp, add sodium polyacrylate in the process of loose pulp, wherein, the consumption of sodium polyacrylate is 150 grams / ton dry stock, and the concentration of loose pulp is 4%; Add cellulase to the final slurry for enzyme treatment, wherein the amount of cellulase is 100 grams per ton of absolute dry slurry, the time of enzyme treatment is 2 hours, and the treatment temperature is 50 ° C; after the enzyme treatment is completed, use Valley refining, wherein the refining concentration is 1.5%, and the freeness after refining is 390ml; use the bleached kraft softwood pulp pulp after refining to make handsheets.

Embodiment 2

[0100] Get bleached kraft coniferous wood paddle board loose pulp, add sodium polyacrylate in the process of loose pulp, wherein, the consumption of sodium polyacrylate is 150 grams / ton dry stock, and the concentration of loose pulp is 4%; Add cellulase to the final slurry for enzyme treatment, wherein the amount of cellulase is 150 grams per ton of absolute dry slurry, the time of enzyme treatment is 2 hours, and the treatment temperature is 50 ° C; after the enzyme treatment is completed, use Valley refining, wherein the refining concentration is 1.5%, and the freeness after refining is 390ml; use the bleached kraft softwood pulp pulp after refining to make handsheets.

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Abstract

The invention discloses a treatment method of papermaking pulp, a preparation method of paper and the paper. The treatment method comprises the following steps: preparing absolute dry pulp which is not ground into pulp; subjecting the absolute dry slurry to pulp dispersing, and adding a cationic polymer in the pulp dispersing process; and adding a biological enzyme into the pulp after pulp dispersion, and carrying out enzyme treatment. According to the invention, the cationic polymer is added during the pulp dispersing, so that cationic groups can be preferentially combined with paper pulp fibers, and a film is formed on a fiber layer, so that excessive fibrillation of the paper pulp fibers by the biological enzyme during subsequent enzyme treatment is avoided, certain integrity of the pulp after pulping is kept, the slurry bonding force is increased, and the slurry viscosity equivalent to that before pretreatment is still realized at the same time.

Description

technical field [0001] The present application relates to the field of papermaking, in particular to a method for processing papermaking slurry, a method for preparing paper and paper. Background technique [0002] Biological enzyme is a non-toxic, environmentally friendly biocatalyst whose chemical nature is protein. The production and application of enzymes has a history of more than 80 years abroad. In the 1980s, bioengineering, as a new high-tech, has developed rapidly in my country. With the gradual expansion of the manufacturing and application fields of enzymes, the application of enzymes in the textile industry is becoming more and more mature. From the past, it was mainly used in the desizing of cotton fabrics and the degumming of silk, and now it is widely used in various fields of textile dyeing and finishing. The superiority of enzymes in the dyeing and finishing industry is gradually reflected. At present, the enzyme treatment process has been recognized as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21D1/20
CPCD21C5/005D21D1/20Y02W30/64
Inventor 芦海杨露闫培养於旺盛
Owner GOLD EAST PAPER JIANGSU