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Preparation method of wood fibers for papermaking

A technology of wood fiber and wood fiber powder, applied in papermaking, fiber raw materials, textiles and papermaking, etc., can solve the problems of paper performance and quality adverse effects, paper performance not improved or reduced

Pending Publication Date: 2021-01-01
深圳市瑞洲实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a phenomenon in domestic papermaking enterprises: that is, sludge reuse and calcium carbonate filling, which can increase the weight of paper, and can also use papermaking sludge, but both sludge and calcium carbonate are just starting. The effect of the filler will not improve the performance of the paper but will reduce it. At the same time, the sludge and calcium carbonate added to the paper will be brought back to the paper mill along with the recycling of the paper, thus creating a vicious circle, which is even more Seriously, this will cause pollution to paper deinking and pulping and have a great adverse effect on paper performance and quality

Method used

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  • Preparation method of wood fibers for papermaking
  • Preparation method of wood fibers for papermaking
  • Preparation method of wood fibers for papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A method for preparing wood fibers for use in replacing waste paper or waste pulp in papermaking, comprising the steps of:

[0063] 1. Process the remaining corner waste from wood processing in general furniture factories, MDF factories and multi-layer board factories, as well as the remaining materials and sawdust in the wood harvesting process, into small wood or wood chips, with a size of 20-25mm in length and width 15-20mm, 2-5mm thick, control the moisture in small wood or wood chips to about 30%;

[0064] 2. Cook the treated fine wood or wood chips, the cooking temperature is 165°C, the cooking time is 5min, the cooking pressure is 1Mpa, the pH of the wood or wood chips is 4.5 during cooking, and then the cooked fine wood is sent into Go to the grinder for thermal grinding. After the thermal grinding is completed, dry it. The fineness of the wood fiber after thermal grinding is required to reach 20 mesh and the sieve rate is over 98%. The moisture content of the d...

Embodiment 2

[0068] A method for preparing wood fibers for use in replacing waste paper or waste pulp in papermaking, comprising the steps of:

[0069] 1. Process the remaining corner waste from wood processing in general furniture factories, MDF factories and multi-layer board factories, as well as the remaining materials and sawdust in the wood harvesting process, into small wood chips with a size of 20-25mm in length and 15 in width -20mm, 2-5mm thick, control the moisture in small wood or wood chips to about 30%;

[0070] 2. Cook the treated fine wood or wood chips, the cooking temperature is 160°C, the cooking time is 5min, the cooking pressure is 1Mpa, the pH of the wood or wood chips is 4.5 during cooking, and then the cooked fine wood is sent into Go to the grinder for thermal grinding, after the thermal grinding is completed, dry, the fineness of the wood fiber after thermal grinding is required to reach 20 mesh and the sieve rate is over 98%, and the moisture content of the dried...

Embodiment 3

[0074] A method for preparing wood fibers for use in replacing waste paper or waste pulp in papermaking, comprising the steps of:

[0075] 1. Process the leftover scraps from the processing of general wood factories, as well as the remaining materials and sawdust in the wood harvesting process, into small wood or wood chips, with a size of 20-25mm in length, 15-20mm in width, and 2-5mm in thickness. The moisture in fine wood or wood chips is controlled at about 35%;

[0076] 2. Cook the treated fine wood or wood chips, the cooking temperature is 180°C, the cooking time is 6min, the cooking pressure is 1.2Mpa, the pH of the wood or wood chips is 5 during cooking, and then the cooked fine wood is sent to Put it into the grinder for thermal grinding, after the thermal grinding is completed, it is dried, the fineness of the wood fiber powder after thermal grinding is required to reach 20 mesh and the sieve rate is more than 98%, and the moisture content of the dried wood fiber pow...

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Abstract

The invention discloses a preparation method of wood fibers for papermaking. The preparation method comprises the following steps: (1), processing a wood raw material into fine wood; (2), regulating and controlling the moisture content of the fine wood to be 25-45%; (3), then steaming and boiling the fine wood at the temperature of 160 DEG C to 180 DEG C; (4), carrying out hot grinding, drying andsieving on the cooked fine wood to obtain wood fiber powder; (5), placing the wood fiber powder in a sterile constant-temperature environment, and applying moisture to the wood fiber powder to control the moisture content of the wood fiber powder to be 35-55%; and (6), treating the wood fiber powder by using laccase or white rot fungi to obtain the wood fiber. The technology that wood fibers replace waste paper can be achieved, and the raw material source is green and environmentally friendly; after the wood fibers are subjected to hot grinding treatment and microbiological treatment, the performance of paper and the strength of finished paper can be well improved; meanwhile, the problem of shortage of waste paper resources is solved.

Description

technical field [0001] The invention relates to the technical field of pulp and papermaking, in particular to a method for preparing wood fiber for papermaking. Background technique [0002] According to the 2018 China Paper Industry Annual Report, the country's paper and cardboard production volume is 104.35 million tons, of which packaging paper production accounts for about 60% of all paper production, which is the main variety of the paper industry. The raw material of packaging paper is mainly recycled waste paper. In 2018, the national output of waste paper pulp was 54.74 million tons, and in 2019 the output of waste paper pulp was 54.43 million tons. However, the output of China's waste paper pulp is only 53.51 million tons, which highlights the huge demand for waste paper or waste paper pulp in my country. On the other hand, the domestic supply of papermaking raw materials is insufficient, and the price of waste paper and waste paper pulp is getting higher and highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/06D21C5/00
CPCD21C5/00D21B1/063
Inventor 胡志滨潘好学鲁代玉沈杰陈荦
Owner 深圳市瑞洲实业股份有限公司
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