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Interlayer reinforcing agent for papermaking as well as raw material composition and preparation method thereof

A technology of raw material composition and interlayer reinforcement, applied in the direction of reinforcing agent addition, papermaking, paper coating, etc., to achieve the effect of easy operation of preparation steps, realization of simple resources and raw material formula

Active Publication Date: 2022-04-01
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is no report on the interlayer strengthening agent for papermaking with dissolving pulp pulping waste liquor as the main raw material

Method used

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  • Interlayer reinforcing agent for papermaking as well as raw material composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) get dissolving pulp pre-hydrolyzate 400g in 1L glass reactor, stir and disperse, add 80g cornstarch and 0.8g tetrasodium EDTA in the reactor, stir and disperse, start to heat up simultaneously, temperature rises to 50 ℃ ℃, add 4g of 1mol / L sulfuric acid, dropwise add a liquid mixed with 16g of glutaraldehyde and 20g of water, the dropwise addition time is 40min, the dropwise addition is completed and the insulation is completed for 120min to obtain material A;

[0034] (2) 8g potassium hydroxide was added to the material A obtained in step (1), 80g 10% ammonium persulfate solution and 40g acrylamide were added dropwise and 60g water mixture was added dropwise, and the sodium persulfate was added dropwise for 80min, acrylamide The dropwise addition time of the mixed solution is 60min, the reaction temperature is 50°C, and the temperature is kept for 90min after all dropwise additions are completed.

Embodiment 2

[0036] (1) get dissolving pulp pre-hydrolyzate 400g in 1L glass reactor, stir and disperse, in reactor, add 40g tapioca starch and 0.4g disodium EDTA, stir and disperse, start to heat up simultaneously, temperature rises to 60 ℃ ℃, add 2g of 1mol / L hydrochloric acid, dropwise add a liquid mixed with 10g of glyoxal and 10g of water, the dropwise addition time is 20min, the dropwise addition is completed and the insulation is completed for 90min to obtain material A;

[0037](2) add 4g sodium hydroxide to the material A obtained in step (1), add 32g 10% sodium persulfate solution and 20g acrylamide dropwise respectively and add 20g water mixture, sodium persulfate dropping time 60min, acrylamide The dropwise addition time of the mixed solution is 40min, the reaction temperature is 55°C, and the temperature is kept for 60min after all dropwise additions are completed.

Embodiment 3

[0039] (1) get dissolving pulp pre-hydrolyzate 400g in 1L glass reactor, stir and disperse, add 20g cornstarch, 20g potato starch and 0.7g disodium EDTA in the reactor, stir and disperse, start to heat up simultaneously, The temperature was raised to 55°C, 4g of 2mol / L acetic acid was added, a liquid mixed with 12g of glutaraldehyde and 12g of water was added dropwise, the dropwise addition time was 30min, and the dropwise addition was completed for 90min of insulation to obtain material A;

[0040] (2) add 5g sodium hydroxide to the material A obtained in step (1), add 60g 10% benzoyl peroxide and 30g acrylamide dropwise respectively and add 30g water mixture, sodium persulfate dropping time 60min, propylene The dropwise addition time of the amide mixed solution is 50min, the reaction temperature is 60°C, and the temperature is kept for 90min after all the dropwise additions are completed.

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Abstract

The invention provides an interlayer reinforcing agent for papermaking. The raw material composition of the interlayer reinforcing agent comprises 100 parts of dissolving pulp prehydrolysis liquid, 10-20 parts of starch, 5-10 parts of acrylamide, 0.5-1 part of an acid catalyst, 1-2 parts of inorganic alkali, 2-4 parts of dialdehyde, 0.5-2 parts of an initiator, 1-2 parts of a stabilizer and 0.1-0.2 part of a complexing agent. The preparation method comprises the following steps: adding starch and a complexing agent into dissolving pulp pre-hydrolysate, heating, adding an acid catalyst, dropwise adding a mixture of dialdehyde and water, after dropwise adding is completed, carrying out a heat preservation reaction at the temperature, then continuing to add inorganic alkali, dropwise adding an initiator and acrylamide, carrying out a heat preservation reaction after dropwise adding is completed, then adding a stabilizer, and carrying out a heat preservation reaction after dropwise adding is completed. And cooling to room temperature to obtain the interlayer reinforcing agent for papermaking. According to the interlayer reinforcing agent for papermaking, the pulping waste liquid wide in renewable source serves as the main raw material, the raw material formula is relatively simple, the preparation steps are simple and easy to operate, and the interlayer reinforcing agent can effectively improve internal bonding between fibers and the ring crush value of a paper sample when being used for spraying paper.

Description

technical field [0001] The invention relates to the technical field of papermaking reinforcing agents, in particular to an interlayer reinforcing agent for papermaking, a raw material composition thereof and a preparation method thereof. Background technique [0002] In recent years, the sulphate-based dissolving pulping process has integrated the concept of biomass refining, with pre-treatment to remove hemicellulose before pulping to obtain higher quality dissolving pulp. The pre-hydrolysate contains hemicellulose degradation products, small molecular lignin, furfural, acetic acid and other products. These components can be recycled and reused, which can reduce the environmental pollution load on the one hand, and bring additional benefits to pulp and paper enterprises on the other hand. economic benefits. [0003] With the decrease of the total amount of non-renewable resources such as oil and coal, it is becoming an important development trend to obtain new materials, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18D21H19/10D21H17/01D21H17/24D21H17/23D21H17/28D21H17/37C08F251/00C08F283/00C08F220/56
Inventor 施晓旦李燕金霞朝
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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