Preparation method of natural-color bamboo fiber biochemical mechanical pulp

A biochemical and bamboo fiber technology, applied in the pulp beating method, pulp beating/refining method, non-woody plant/crop pulp, etc., can solve the problems of difficult to control cooking uniformity, unstable quality, etc., and achieve relief The effect of raw material cost pressure, reduction of fragment generation, improvement of strength

Active Publication Date: 2020-01-17
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can solve the raw material bottleneck problem faced by the existing packaging paper and cardboard manufacturers in my country, make full use of high-yield and high-quality bamboo as raw material, and combine biological, chemical and physical methods to produce natural color bamboo fiber chemical mechanical pulp for packaging , and at the same time make full use of the leftovers in the production process (that is, bamboo chips, pith, knots and other sundries), turn waste into treasure, realiz

Method used

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  • Preparation method of natural-color bamboo fiber biochemical mechanical pulp

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Experimental program
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Effect test

Embodiment 1

[0052] A preparation method of natural color bamboo fiber biochemical mechanical pulp, comprising the following steps:

[0053] (1) The raw material is prepared by dry method, and the raw bamboo is cut into 10-50mm long and 5-20mm wide bamboo slices; after screening, the large pieces sifted out are then cut to make them reach 10-50mm long and 5-20mm wide Size, pass rate of more than 85%. Screened bamboo chips, bamboo pith, knots and other fine debris are used when the bamboo chips are fermented.

[0054] (2) The qualified bamboo chips after screening are sent into a press for pre-pressing, the pre-pressing pressure is 2.5MPa, the pressing time is 10min, and the temperature is normal temperature.

[0055] (3) Bamboo chip fermentation: wet the pre-pressed bamboo chips with water to make the water content 45%-55%; finely crush the water-moistened bamboo chips together with the shavings, pith, knots, etc. The sundries are mixed with cow dung, sheep dung, horse dung, pig dung and o...

Embodiment 2

[0072] A preparation method of natural color bamboo fiber biochemical mechanical pulp, comprising the following steps:

[0073] (1) Prepare materials by dry method, cut bamboo into 10-50mm in length and 5-20mm in width; after screening, the sieved large pieces are then cut to make it reach the size of 10-50mm in length and 5-20mm in width, qualified The rate is over 85%. The screened bamboo chips, bamboo pith, knots and other fine debris are used for later fermentation.

[0074] (2) Qualified bamboo chips after screening are sent to an extruder for extruding, the pre-extruding pressure is 5.0MPa, the extruding time is 2min, and the temperature is normal temperature.

[0075] (3) Bamboo slice fermentation: add water to the pre-pressed bamboo slices to make the water content 45%-55%; add water to moisten the bamboo slices together with the shavings, pith, knots, etc. The sundries are mixed with cow manure, sheep manure, horse manure, pig manure and other animal manure accordin...

Embodiment 3

[0085] A preparation method of natural color bamboo fiber biochemical mechanical pulp, comprising the following steps:

[0086] (1) Cut the bamboo into 10-50mm long and 5-20mm wide. After screening, the qualified bamboo chips are sent to the press for pressing. The pre-pressing pressure is 3.5 MPa, the pressing time is 6 minutes, and the temperature is normal temperature.

[0087] (2) Bamboo chip fermentation: the pre-pressed bamboo chips, together with fine debris such as shavings, pith, and knots, are mixed with animal manure such as cow dung, sheep manure, horse manure, and pig manure at a ratio of 6:4. Stir evenly, and after mixing evenly, pile up long strips with a length of 2-2.5m, a width of 1.5-2m, and a height of 0.8-1m, and cover them with sacks for aerobic fermentation. While mixing, add 2% high-efficiency active biological compound bacteria relative to the mass of the dry bamboo slices for fermentation. The fermentation time is 96 hours, and the moisture content of...

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Abstract

The invention belongs to the field of pulping and papermaking, and specifically relates to a preparation method of a natural-color bamboo fiber biochemical mechanical pulp. The method comprises the following steps: 1) preparing materials by a dry method; 2) sending bamboo chips obtained in the step 1) to a press for pressing; 3) mixing animal manure and the bamboo chips, and screened-out finely-divided debris such as bamboo sawdust, bamboo piths and knots according to a ratio, then performing aerobic fermentation composting, and adding efficient active biological complex bacteria while mixing;4) performing screening and dust removal treatment after fermentation is completed; 5) washing away surface substances of the bamboo chips after screening and dust removal, and removing excess water;6) performing pre-impregnation with a lye; 7) performing pulp grinding or pulp beating; and 8) performing papermaking. The method uses the combination of biological, chemical, and physical methods toproduce the natural-color bamboo fiber chemical mechanical pulp for packaging. At the same time, the method makes full use of the leftover materials in the production process to turn waste into treasure, and realizes sufficient and high-quality utilization of bamboo raw materials.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and in particular relates to a method for preparing a high-density pulp by using bamboo as a raw material by cutting off raw materials, pre-pressing, mixing and fermenting, screening and dedusting, washing, lye pre-impregnation, high-consistency beating, low-consistency beating, and papermaking. Natural bamboo fiber biochemical mechanical pulp with added value, less environmental pollution and better quality for packaging; natural bamboo fiber biochemical mechanical pulp can also be used to make natural paper and other products. Specifically, it is a preparation method of natural bamboo fiber biochemical mechanical pulp. Background technique [0002] In recent years, my country's paper industry has been in the transition period of reducing production capacity and adjusting structure. Compared with other packaging materials, packaging paper and cardboard, as the main packaging materials, are...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21B1/06D21B1/34D21C1/06D21C7/00D21D1/02D21D1/30D21D1/34D21F13/00
CPCD21B1/061D21B1/345D21C1/06D21C7/00D21D1/02D21D1/30D21D1/34D21F13/00D21H11/12
Inventor 杨玲李文俊赵建芬高洪霞蒋大春蒋河何东坡邓鹏振郭嘉杰魏觉民周秩富张振涛罗丹符娟余翔翔陈思魁黄俊义陈书仑
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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