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A method for preparing waste paper reinforcing agent from agricultural straw

A technology of reinforcing agent and straw, applied in pulp beating/refining method, papermaking, textiles and papermaking, etc., can solve the problems of resource waste and ineffective utilization

Active Publication Date: 2021-09-10
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such abundant parenchyma cell resources have not been effectively utilized at present, which is a huge waste of resources

Method used

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  • A method for preparing waste paper reinforcing agent from agricultural straw
  • A method for preparing waste paper reinforcing agent from agricultural straw
  • A method for preparing waste paper reinforcing agent from agricultural straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Cut the air-dried corn stalks into 2-3cm pieces, and process them in a rotary cooker with a solid-to-liquid ratio of 1:5, a maximum temperature of 175°C, and a holding time of 30 minutes. The processed raw materials are separated from solids and liquids and washed clean. Then, the treated raw material is mechanically treated with a disc refiner, and the refining concentration is 25%, so as to obtain high-yield pulp of corn stalks. Sieve with a 100-mesh sieve at a concentration of 1%, and the part that passes through the sieve is the parenchyma cell component. A high-pressure homogenizer was used to process the parenchyma cell suspension with a concentration of 1% under a pressure of 30 MPa for 30 minutes to obtain high-pressure homogenized modified parenchyma cells. The raw material of waste paper pulp is domestic old corrugated box (OCC). The modified parenchyma cells are mixed with waste paper pulp. The amount of parenchyma cells is 5% (mass ratio, relative to dry was...

Embodiment 2

[0032] Cut the air-dried corn stalks into 2-3cm pieces, and process them in a rotary cooker with a solid-to-liquid ratio of 1:8, a maximum temperature of 160°C, and a holding time of 50 minutes. The processed raw materials are separated from solids and liquids and washed clean. Then, the treated raw material is mechanically treated with a disc refiner, and the refining concentration is 5%, so as to obtain high-yield pulp of corn stalks. Sieve with a 200-mesh sieve at a concentration of 1%, and the part that passes through the sieve is the parenchyma cell component. A high-shear emulsification machine was used to process the fine component suspension with a concentration of 1% at 10,000 rpm for 10 minutes to obtain parenchyma cells modified by high-shear emulsification. The raw material of waste paper pulp is domestic old corrugated box (OCC). The modified parenchyma cells are mixed with waste paper pulp. The amount of parenchyma cells is 10% (mass ratio, relative to dry waste ...

Embodiment 3

[0036] The air-dried wheat straw is cut into 2-4cm grass sections, and processed in a rotary cooker with a solid-to-liquid ratio of 1:4, a maximum temperature of 170°C, and a holding time of 40 minutes. The processed raw materials are separated from solid and liquid and washed clean. Then, the treated raw material is mechanically treated with a disc refiner, and the refining concentration is 25%, so as to obtain high-yield pulp. Sieve with a 100-mesh sieve at a concentration of 1%, and the part that passes through the sieve is the parenchyma cell component. A high-pressure homogenizer was used to process the parenchyma cell suspension with a concentration of 1% under a pressure of 80 MPa for 20 minutes to obtain high-pressure homogenized modified parenchyma cells. The raw material of waste paper pulp is domestic old corrugated box (OCC). The modified parenchyma cells are mixed with waste paper pulp. The amount of parenchyma cells is 4% (mass ratio, relative to dry waste paper ...

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Abstract

The invention relates to a method for preparing a waste paper reinforcing agent from agricultural stalks, which uses an environment-friendly method without adding any chemicals to separate the parenchyma cells in the agricultural stalks, and then changes them by mechanical modification. shape, making it fibrillated. Adding modified parenchyma cells in the process of making corrugated base paper, box board and other products from waste paper can improve the strength performance of the product. This will effectively promote the benign development of industrial utilization of straw, which not only reduces environmental pollution but also creates economic value, with high economic and social benefits. The invention solves the problem that parenchyma cells are difficult to transform and utilize in the prior art, resulting in waste of resources, and provides a new approach for the full and high-value utilization of agricultural straw.

Description

technical field [0001] The invention relates to the field of pulping and papermaking industry, in particular to a method for separating parenchyma cells from agricultural stalks and a method for modifying parenchyma cells as a strengthening agent for waste paper making. Background technique [0002] As the world's largest paper consumer and producer, China's total pulp consumption in 2016 reached 97.97 million tons, of which waste paper pulp was 63.29 million tons, accounting for 65% of the total pulp consumption (of which imported waste paper pulp accounted for 24%, and domestic waste paper pulp accounted for 24%. 41%). Waste paper pulp is generally used to produce corrugated base paper, container board, white board and bobbin paper. With the increase of recycling times of waste paper, the fiber properties will continue to decay, the tightness of paper sheets will become smaller, and the tensile strength, bursting strength and compressive strength will continue to decline....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/12D21B1/06D21D1/30D21D5/02
CPCD21B1/061D21D1/30D21D5/02D21H11/12
Inventor 王高升韩笑宇张琛霞刘泽华
Owner TIANJIN UNIV OF SCI & TECH
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