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Magnetic paper prepared by recycling paper diaper leftover material fibers and preparation method thereof

A technology for scraps and diapers, applied in the field of pulping and papermaking, can solve the problems of uneven distribution of magnetic components in the finished paper, low retention rate, etc., and achieve the effects of improving social and economic benefits, improving strength performance, and enhancing magnetic performance.

Inactive Publication Date: 2019-11-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of magnetic paper prepared by reusing diaper scrap fiber, which solves the problem of Fe in existing magnetic paper. 3 o 4 The problem of low retention rate can be avoided, and the problem of uneven distribution of magnetic components in paper can be avoided

Method used

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  • Magnetic paper prepared by recycling paper diaper leftover material fibers and preparation method thereof
  • Magnetic paper prepared by recycling paper diaper leftover material fibers and preparation method thereof
  • Magnetic paper prepared by recycling paper diaper leftover material fibers and preparation method thereof

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preparation example Construction

[0058] The present invention also provides a preparation method for the magnetic paper prepared by reusing the leftover fiber of diapers, the specific steps are as follows:

[0059] Step 1, pulverizing the leftover fiber of diapers and dissolving it in water, then adding polyaluminum chloride, bentonite, zeolite powder, and nano-ferrous ferric oxide in sequence to fully stir to obtain a slurry, and then dispersing to obtain a fiber slurry;

[0060] In step 1, the amount of polyaluminum chloride added is 0.5% to 0.8% of the fiber mass of diaper scraps; the amount of bentonite added is 0.3% to 1.0% of the mass of diaper scrap fibers; the amount of zeolite powder added is 0.5% of the mass of diaper scrap fibers. 0.1% to 0.5%; the amount of nano ferric oxide added is 5% to 10% of the fiber mass of diaper scraps;

[0061] In step 1, defrosting is carried out with a defibrillator, and the rotating speed of the defibrillator is 25000 rpm.

[0062] Step 2, making the fiber slurry pro...

Embodiment 1

[0078] 1) Collect the pulverized diaper scrap fiber as the raw material for the experiment, which comes from the diaper manufacturer.

[0079] 2) Take 2.6 grams of the pulverized sample of paper diaper scrap fiber, add it to 500ml of water, and use the 260 type deflagging machine produced by Sweden AB L&W company to decompose the slurry, decompose at 25000 rpm, and add water until the slurry concentration reaches 0.5%. It is produced by German HG company The BBS-3_D-45476 paper sample machine was used to make paper, dry at 105°C, and make a paper sheet, which was used as a blank sample.

[0080] 3) Take 2.6 grams of diaper scrap fiber pulverized sample, add 300ml of water, and weigh 0.5% polyaluminum chloride relative to the diaper scrap fiber mass, 1.0% bentonite relative to the diaper scrap fiber mass, and 1.0% bentonite relative to the diaper scrap fiber mass. 0.5% of the zeolite powder of the fiber quality, 7% of the nano-ferric iron tetroxide relative to the 7% of the fib...

Embodiment 2

[0084] Take 2.6 grams of pulverized diaper samples, add them to 300ml of water, and weigh 0.6% polyaluminum chloride relative to the mass of diaper scrap fibers, 0.5% bentonite relative to the mass of diaper scrap fibers, and 0.3% relative to the mass of diaper scrap fibers. % of zeolite powder, 5% nano-iron ferric oxide relative to the quality of paper diaper leftover fiber, and add it to the fiber slurry, add water to 500ml, stir evenly, and then use a decontamination machine to decompose at 25000 rpm, After the fiber slurry is obtained, after the fiber dispersing is completed, the fiber slurry is stirred evenly and then added to the paper sample picker, and water is added to make the concentration of the slurry reach 0.5%, and the water is released to make it into a wet paper web, and then press rollers. Press it manually, and finally put it into a paper dryer, and dry it at 105°C for 5 minutes under the condition of a vacuum of 0.06MPa. After drying, put it under vacuum and...

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Abstract

The invention discloses magnetic paper prepared by recycling leftover material fibers of paper diapers, which comprises a magnetic raw paper layer, and magnetic coatings are arranged on the front surface and the back surface of the magnetic raw paper layer. The magnetic paper solves the problem of low retention rate of Fe3O4 in the existing magnetic paper. The preparation method of the magnetic paper comprises the following steps: 1, crushing paper diaper leftover material fibers, dissolving the crushed paper diaper leftover material fibers in water, sequentially adding polyaluminum chloride,bentonite, zeolite powder and nano ferroferric oxide, fully stirring to obtain a slurry, and defibering the slurry; 2, papermaking the fiber pulp into paper; 3, adding sodium alginate, konjac gum, humic acid, nano Fe3O4 and a silane coupling agent into water, and continuously stirring the mixture for later use of sizing; and 4, sizing the front and back sides of the paper made in the step 2 by using a sizing machine with the sizing agent in the step 3, soaking the sized paper in a calcium chloride solution, taking out the paper, and feeding the paper into a glazing dryer for drying and calendaring treatment. The method is simple and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a magnetic paper prepared from recycled diaper leftover fibers; the invention also relates to a preparation method of the magnetic paper prepared from recycled diaper leftover fibers. Background technique [0002] Magnetic paper is a new type of functional paper, which stores a large amount of information and has strong information security. It has broad application prospects in industrial and agricultural production, medical care, printing industry, anti-counterfeiting industry, national defense, scientific research and other fields. [0003] At present, the preparation method of magnetic paper has Fe 3 o 4 Mixed with flocculant, etc., added to the fiber slurry during the papermaking process, using physical methods to introduce magnetic powder particles into the cell wall channels of cellulose fibers, thereby making magnetic fibers, and then making ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H11/14D21H19/84D21H17/66D21H17/67D21H17/68D21H21/52D21H19/38D21H19/46D21H19/44D21H19/64D21H21/14D21H21/16
CPCD21H27/00D21H11/14D21H19/84D21H17/66D21H17/67D21H17/68D21H17/675D21H21/52D21H19/385D21H19/46D21H19/44D21H19/64D21H21/14D21H21/16
Inventor 王念东薛俭孟卿君张素风
Owner SHAANXI UNIV OF SCI & TECH
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