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Treatment method of wet curtain paper broke

A processing method, technology of wet curtain paper, applied in fiber raw material processing, paper, papermaking, etc., can solve the problems of high wet strength requirements, long processing time, waste of fiber raw materials, etc.

Inactive Publication Date: 2020-10-23
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The wet curtain paper used in the interlayer of water-cooled air conditioners requires high wet strength. A large amount of wet strength agent is added during production, so that the broken paper and waste paper produced in the production process are not handled properly, which will cause obvious cracks on the paper surface. Shredded paper will affect the appearance and use of wet curtain paper
The original broken paper treatment was done with a calender shredder at room temperature. The treatment took a long time, and there were a lot of unshredded paper pieces, which caused a waste of fiber raw materials. After recycling, there were still shredded paper pieces in the paper pages. Poor, affecting processing and use

Method used

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  • Treatment method of wet curtain paper broke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for processing damaged wet curtain paper, comprising the following steps:

[0026] Step 1: Evenly put the broken paper and waste paper produced during production into the pulper, add water, turn on the steam valve and heat to 82°C for preliminary disintegration to obtain pulp. The disintegration time is 2.5 hours. The concentration is 4.3%;

[0027] Step 2: Send the slurry obtained after the treatment in step 1 to the slurry storage tank, and pump it to a disc refiner for slight disintegration until the slurry is completely disintegrated;

[0028] Step 3: Send the slurry treated in step 2 to a beater, then add nonylphenol polyoxyethylene ether and naphthenate, the beating concentration is 6%, the beating degree is 35°SR, and the nonylphenol polyoxyethylene ether and naphthenate are added. The added mass of phenolic polyoxyethylene ether accounts for 2% of the total mass of the slurry; the added mass of the naphthenate accounts for 1.0% of the total mass of the...

Embodiment 2

[0031] A method for processing damaged wet curtain paper, comprising the following steps:

[0032] Step 1: Evenly put the broken paper and waste paper produced during production into the pulper, add water, open the steam valve and heat to 80°C for preliminary disintegration to obtain pulp. The disintegration time is 2 hours and the pulp concentration 5%;

[0033] Step 2: Send the slurry obtained after the treatment in step 1 to the slurry storage tank, and pump it to a disc refiner for slight disintegration until the slurry is completely disintegrated;

[0034] Step 3: Send the slurry treated in step 2 to a beater, then add nonylphenol polyoxyethylene ether and naphthenate, the beating concentration is 8%, the beating degree of beating is 38°SR, and the nonylphenol polyoxyethylene ether and naphthenate are added. The added mass of phenolic polyoxyethylene ether accounts for 5% of the total mass of the slurry; the added mass of the naphthenate accounts for 0.5% of the total ma...

Embodiment 3

[0037] A method for processing damaged wet curtain paper, comprising the following steps:

[0038] Step 1: Evenly put the broken paper and waste paper produced during production into the pulper, add water, open the steam valve and heat to 85°C for preliminary disintegration to obtain pulp. The disintegration time is 2.2 hours. The concentration is 4%;

[0039] Step 2: Send the slurry obtained after the treatment in step 1 to the slurry storage tank, and pump it to a disc refiner for slight disintegration until the slurry is completely disintegrated;

[0040] Step 3: Send the slurry treated in step 2 to a beater, then add nonylphenol polyoxyethylene ether and naphthenate, the beating concentration is 7%, the beating degree of beating is 36°SR, and the nonylphenol polyoxyethylene ether and naphthenate are added. The added mass of phenol polyoxyethylene ether accounts for 4% of the total mass of the slurry; the added mass of the naphthenate accounts for 0.8% of the total mass of...

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Abstract

The invention discloses a treatment method of wet curtain paper broke, which belongs to the technical field of papermaking, and comprises the following steps: step 1, uniformly putting broke and wastepaper which are generated in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 80-85 DEG C, and carrying out preliminary repulping to obtaina pulp; 2, sending the pulp treated in the step 1 to a slurry storage tank, and pumping the pulp to a disc mill for slight defibering until the pulp is completely disintegrated; 3, sending the pulp treated in the step 2 into a beater, and adding a nonionic surfactant and an anionic surfactant; 4, conveying the pulp treated in the step 3 to a wet curtain paper production system to be recycled, wherein the matching proportion is 12%-20%; according to the method, the pulping fibers are recycled, waste of fiber raw materials is avoided, the paper quality index is not affected, and the water absorption and mildew resistance of the wet curtain paper are enhanced.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a method for treating damaged wet curtain paper. Background technique [0002] The wet curtain paper used in the interlayer of water-cooled air conditioners requires high wet strength. A large amount of wet strength agent is added during production, so that the broken paper and waste paper produced in the production process are not handled properly, which will cause obvious cracks on the paper surface. Shredded paper will affect the appearance and use of the wet curtain paper. The original broken paper treatment was done with a calender shredder at room temperature. The treatment took a long time, and there were a lot of unshredded paper pieces, which caused a waste of fiber raw materials. After recycling, there were still shredded paper pieces in the paper pages. Poor, affecting processing and use. Contents of the invention [0003] Aiming at the problems exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02D21H17/53D21H17/06D21H17/07D21H17/12D21H21/08D21H21/14D21H21/36
CPCD21C5/02D21H17/53D21H17/06D21H17/07D21H17/12D21H21/08D21H21/14D21H21/36Y02W30/64
Inventor 周金涛朱宏伟史梦华吴恒何江林李丹
Owner YUEYANG FOREST & PAPER CO LTD
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