Preparation method of chemimechanical leaf pulp

A chemical machinery and leaf technology, applied in the field of chemical mechanical pulp preparation, can solve the problems of restricting the healthy development of the paper industry, lack of wood fiber resources, and poor quality of domestic waste paper, so as to alleviate the tension of fiber resources, protect the natural environment, The effect of low production cost

Inactive Publication Date: 2020-06-26
湖南瑞福尼新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's forest coverage rate is low, wood fiber resources are scarce, and the quality of domestic waste paper is poor. For a long time, wood pulp and waste paper used in paper production have relied heavily on imports, which seriously restricts the healthy development of the paper industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select poplar leaves as raw materials, wash and remove dust, cut into small pieces with a length and width of 2-4 cm, and set aside. Stand-by raw materials are placed in the reactor, adding concentration is 8% sodium hydroxide aqueous solution, control solid-liquid ratio is 1:5, be warming up to 90 DEG C, process 60 minutes. The alkali-treated raw material is taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw material is controlled to be less than 40%. Adjust the concentration of the screened raw materials to 25%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.8-1.0 mm, and the second stage controls the disc refiner gap to 0.25-0.3 mm. Control the beating degree of the milled slurry at 45-55 SR.

[0026] The slurry obtained in this embodiment can be us...

Embodiment 2

[0028] Wash and remove the leaves of magnolia leaves and sycamore leaves, cut into small pieces with a length and width of 2-4 cm, mix them according to the weight ratio of 60:40 (dry weight), and set aside. Put the spare raw materials in the reaction kettle, add a mixed aqueous solution of sodium hydroxide and sodium carbonate with a concentration of 10% (solute mass ratio 1:1), control the solid-liquid ratio to 1:4, heat to 85 ° C, and treat for 90 minutes . The processed raw materials are taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw materials is controlled to be less than 25%. Adjust the concentration of the screened raw materials to 20%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.6-0.8 mm, and the second stage controls the disc refiner gap to 0.3...

Embodiment 3

[0031] Choose linden leaves as raw materials, wash and remove dust, cut into small pieces with a length and width of 2-4 cm, and set aside. Put the spare raw materials in the reaction kettle, add a mixed aqueous solution of sodium hydroxide and sodium bicarbonate with a concentration of 15% (solute ratio 2:1), control the solid-liquid ratio to 1:4.5, heat to 90°C, and process for 120 minutes . The processed raw materials are taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw materials is controlled to be less than 10%. Adjust the concentration of the screened raw materials to 15%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.5-0.6 mm, and the second stage controls the disc refiner gap to 0.2-0.3 mm. Control the beating degree of the milled slurry at 35-40 S...

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PUM

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Abstract

The invention discloses a preparation method of chemimechanical leaf pulp. The preparation method comprises the main steps of material preparation, chemical treatment, mechanical kneading and screening, mechanical pulp grinding and the like. The prepared chemimechanical leaf pulp takes vein tissues as a skeleton structure, is high in pulp yield and good in pulp performance, and can be used for producing corrugated base paper, packaging paperboards, paper-plastic molds, cultural paper and the like. Broadleaf wood leaves with rich resources are used as a raw material to produce the paper pulp, so that the problem of fiber resource shortage in the papermaking industry in China can be effectively relieved, pulping and papermaking wood resource consumption can be reduced, and the natural environment is protected. The method is simple in technological process, high in operability, low in production cost and easy for large-scale industrialization.

Description

technical field [0001] The invention relates to a method for preparing chemical mechanical pulp by using leaves as raw materials, and belongs to the field of papermaking technology and new materials. Background technique [0002] The paper industry is an important basic raw material industry for the national economy, and my country is the world's largest producer of paper and cardboard. According to statistics, in 2018, China's paper and paperboard production volume was 104.35 million tons, and its pulp consumption was 93.87 million tons, including 33.03 million tons of wood pulp and 54.74 million tons of waste paper pulp. my country's forest coverage rate is low, wood fiber resources are scarce, and the quality of domestic waste paper is poor. For a long time, wood pulp and waste paper used in paper production have relied heavily on imports, which seriously restricts the healthy development of the paper industry. In April 2017, the central government issued the "Implementa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/02D21B1/04D21D1/20D21D1/30
CPCD21D1/20D21D1/30D21B1/02D21B1/04
Inventor 王玉珑吴学勋
Owner 湖南瑞福尼新材料科技有限公司
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