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Method for improving strength of wastepaper fibers based on nanometer microcrystalline cellulose

A technology of nano crystallite and waste paper fiber, which is applied in textiles and papermaking, adding inorganic compounds, etc., to achieve the effects of high-efficiency application, easy operation and control, and simple process

Inactive Publication Date: 2015-12-02
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, paper made from waste paper has many deficiencies in its physical properties, and it is often necessary to add additives in the production process to improve paper performance.

Method used

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  • Method for improving strength of wastepaper fibers based on nanometer microcrystalline cellulose
  • Method for improving strength of wastepaper fibers based on nanometer microcrystalline cellulose
  • Method for improving strength of wastepaper fibers based on nanometer microcrystalline cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for improving the strength of waste paper fibers based on nanocrystalline cellulose. Take 2.0g (calculated on an absolute dry basis) of fiber slurry, add 1000ml of water, and disintegrate it in a GBJ-A fiber standard disintegrator for 1min. Add 0.3g of calcium carbonate and 1.0ml of cationic polyacrylamide solution (the amount of nano-microcrystalline cellulose added is 0), stir for 1min each time a component is added, and finally decompose in a GBJ-A fiber standard dissociation device 1min, spare. Inject 6L of water into the forming part of the ZQJ1-B-II paper extractor, pour the decomposed slurry into the former, continue to add water until the water volume is 8L, stir it up and down for 5 times with a special stirrer, and open the water release valve to release the water , so that the fibers are formed on the copper mesh. The formed wet paper was transferred between two dry cloths, a certain amount of water was removed by a pressing process, and then vacuum...

Embodiment 2

[0025] A method for improving the strength of waste paper fibers based on nanocrystalline cellulose. Take 2.0g (calculated on an absolute dry basis) of fiber slurry, add 1000ml of water, and disintegrate it in a GBJ-A fiber standard disintegrator for 1min. Add 0.3g of calcium carbonate, 1.0ml of cationic polyacrylamide solution and 1.1ml of nano-microcrystalline cellulose suspension (the amount of nano-microcrystalline cellulose is 2% of the mass of cationic polyacrylamide) Stir for 1 min, and finally disintegrate in a GBJ-A fiber standard dissociator for 1 min, and set aside. Inject 6L of water into the forming part of the ZQJ1-B-II paper extractor, pour the decomposed slurry into the former, continue to add water until the water volume is 8L, stir it up and down for 5 times with a special stirrer, and open the water release valve to release the water , so that the fibers are formed on the copper mesh. The formed wet paper was transferred between two dry cloths, a certain am...

Embodiment 3

[0027] A method for improving the strength of waste paper fibers based on nanocrystalline cellulose. Take 2.0g (calculated on an absolute dry basis) of fiber slurry, add 1000ml of water, and disintegrate it in a GBJ-A fiber standard disintegrator for 1min. Add 0.3g of calcium carbonate, 1.0ml of cationic polyacrylamide solution and 2.2ml of nano-microcrystalline cellulose suspension (the amount of nano-microcrystalline cellulose is 4% of the mass of cationic polyacrylamide) Stir for 1 min, and finally disintegrate in a GBJ-A fiber standard dissociator for 1 min, and set aside. Inject 6L of water into the forming part of the ZQJ1-B-II paper extractor, pour the decomposed slurry into the former, continue to add water until the water volume is 8L, stir it up and down for 5 times with a special stirrer, and open the water release valve to release the water , so that the fibers are formed on the copper mesh. The formed wet paper was transferred between two dry cloths, a certain am...

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Abstract

The invention relates to a method for improving the strength of wastepaper fibers based on nanometer microcrystalline cellulose. The method comprises the following steps: preparing the nanometer microcrystalline cellulose and a wastepaper pulp; taking a certain amount of the pulp, adding a proper amount of water, sequentially adding calcium carbonate, a cationic polyacrylamide solution and a nanometer microcrystalline cellulose suspension, and defibering in a GBJ-A fiber standard dissociator; shaping the defibered pulp in the shaping position of a ZQJ1-B-II paper handsheet former to obtain wet paper; and transferring the wet paper to a position between two dry cloths, carrying out a squeezing technology to remove a certain amount of water, and carrying out vacuum drying at 105DEG C for 15min to obtain dry paper. The method has the advantages of simple process, no need of arrangement of any devices, and easy operation control, and is of great guiding significance to efficient application of wastepaper fibers and enterprise production adopting wastepaper as a raw material.

Description

technical field [0001] The invention relates to a method for improving the strength of waste paper fibers based on nano-microcrystalline cellulose. The invention uses waste paper pulp as raw material, calcium carbonate as filler, cationic polyacrylamide and nano-microcrystalline cellulose as wet-end additives to obtain paper with good physical properties. Background technique [0002] With the development of society and economy, the use of paper is increasing rapidly. Using wood raw materials to make paper will consume a lot of resources and will destroy the balance of the ecological environment. Papermaking from waste paper has gradually become the development trend of the modern paper industry. It can not only reduce the damage to the ecology, but also alleviate the pollution of waste paper to the environment. However, paper made from waste paper has many deficiencies in its physical properties, and it is often necessary to add additives in the production process to impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H17/67D21H17/55
Inventor 唐艳军裴勤勤陈志恒
Owner ZHEJIANG SCI-TECH UNIV
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