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Clean preparation method of high-quality and high-purity natural-color bamboo fluff pulp

A high-purity, high-quality technology, applied in chemical/chemomechanical pulp, washing/replacement pulp treatment liquid, papermaking, etc., can solve the problems of increasing the amount of chemicals in the bleaching section, affecting the product qualification rate, and increasing costs, and achieves alleviation The effect of raw material cost pressure, improving resource utilization value, and reducing production cost

Active Publication Date: 2016-12-07
李文俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commercially available fluff pulp is basically bleached pulp, which is mostly bleached with high-efficiency chlorine-containing bleaching agent. Increase the amount of chemicals required for bleaching, corresponding equipment investment, decline in pulping yield, increase in labor intensity of personnel, increase in cost and other issues, and lead to bleaching wastewater (containing a large amount of chloroform, chlorinated phenolic compounds, chlorine, etc. Toxic chlorinated organic substances such as dioxins and furans) are difficult to meet the standards, which brings serious problems such as destructiveness to the ecological environment and harm to organisms
In addition, when the bleached fluff pulp is processed, the fibers have to undergo depolymerization and degradation due to the bleaching process, resulting in a lot of dust during processing, which not only affects the working environment, affects the physical and mental health of the operator, but also affects the pass rate of the product

Method used

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  • Clean preparation method of high-quality and high-purity natural-color bamboo fluff pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) fully and evenly disperse the commercially available natural color KP bamboo slurry;

[0035] The intermittent medium-concentration hydraulic disintegrator with a milder disintegration effect is adopted. The disintegration effect mainly depends on the pumping action generated by the conical screw moving the pulp, and the disintegration effect is excellent. The bamboo pulp board is disintegrated and dispersed into a uniform fiber suspension. Here The used intermittent medium-consistency hydraulic disintegrator has a medium-concentration crushed pulp concentration of 7%-12%, does not need to be heated for crushing, and the crushing temperature is room temperature. The specific operation is to send the bamboo pulp board to be decomposed into the pulper with a certain water storage capacity through the weighing conveyor, so as to accurately control the decomposed pulp concentration.

[0036] The mass content of α-cellulose in commercially available natural color KP bamb...

Embodiment 2

[0049] Other content is as embodiment 1, comprises the following steps in preparation process:

[0050] (1) fully and evenly disperse the commercially available natural color KP bamboo slurry;

[0051] (2) After the thawed slurry is diluted, it is sent to a heat disperser, and sodium hydroxide is added to carry out alkali extraction while dispersing.

[0052] The heat dispersion time is 15 minutes, the temperature is 60°C, the mass concentration of the incoming pulp is 3%, the mass concentration of the outgoing pulp is 15%, and the amount of sodium hydroxide is 3.5% relative to the dry pulp mass.

[0053] (3) The slurry after thermal dispersion is diluted with water, and then enters the flotation machine for flotation, and at the same time, the collector agent alkylphenol polyoxyethylene ether is added.

[0054] Flotation process conditions: slurry mass concentration 1.5%, temperature at room temperature, time 8min, relative to the dry pulp mass, the amount of ethylene oxide ...

Embodiment 3

[0061] Other content is as embodiment 1, comprises the following steps in preparation process:

[0062] (1) fully and evenly disperse the commercially available natural color KP bamboo slurry;

[0063] (2) After the thawed slurry is diluted, it is sent to a heat disperser, and sodium hydroxide is added to carry out alkali extraction while dispersing.

[0064] The heat dispersion time is 12 minutes, the temperature is 80°C, the mass concentration of the incoming pulp is 7%, the mass concentration of the outgoing pulp is 10%, and the amount of sodium hydroxide is 0.5% relative to the dry pulp mass.

[0065] (3) The slurry after thermal dispersion is diluted with water, and then enters the flotation machine for flotation, and at the same time, the collector fatty alcohol polyoxyethylene ether is added.

[0066] The technological conditions of flotation: the mass concentration of the slurry is 1.2%, the temperature is room temperature, the time is 15 minutes, and the amount of et...

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Abstract

The invention belongs to the pulping field, and particularly relates to a clean preparation method of high-quality and high-purity natural-color bamboo fluff pulp. The method comprises the following steps that natural-color KP bamboo pulp is fully and uniformly defiberized; the defiberized pulp is diluted and then fed into a heat disperser, and sodium hydroxide is added for alkali extraction; the pulp subjected to heat dispersion is diluted with water and enters a flotation machine for flotation, and meanwhile a trapping agent oxirane-epoxypropane copolymer is added; the pulp obtained after flotation is washed and shrunk through a vacuum pulp washer, and generated washing waste liquid is drained; the pulp enters a pulp board papermaking workshop after being washed. The natural-color bamboo fluff pulp prepared through the technology has the advantages that the technological process is simple, the production efficiency, the production capacity, the finished pulp yield rate and the raw material utilization rate are high, investment is low, adopted chemicals are clean and environmentally friendly, a fluff pulp board has the low bursting strength, flexibility, comfort and elasticity are achieved, the liquid absorbing property is good, raising and dissociating are easily achieved, dust is little, and the hygienic indexes such as the good bacterium inhibiting property, antibacterial property and antianaphylaxis meet the requirement.

Description

technical field [0001] The invention belongs to the field of pulping, in particular to a clean preparation method for high-quality and high-purity unbleached bamboo fluff pulp. Background technique [0002] Fluff pulp is a kind of special pulp used to produce various absorbent sanitary products, such as feminine hygiene products, baby diapers, adult incontinence products, breast milk pads, disposable nursing pads, etc. Its products are characterized by low burst resistance, softness, comfort, elasticity, good water absorption and water retention, high bulkiness, high single fiber strength, high purity, easy fluff and dissociation, less dust, and good moisture retention. Hygienic indicators such as antibacterial and antiallergic properties meet the requirements. [0003] At present, the main raw material for the production of fluff pulp is bleached wood pulp, and some bleached cotton linters are also added. Industry insiders believe that the best raw material for producing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/02D21B1/34D21B1/30D21C9/02D21F1/00
CPCD21B1/30D21B1/345D21C9/02D21F1/00D21H11/02
Inventor 杨玲李文俊彭成庞春霞于成龙肖林张豪王尧王云凤张恒瑞余森林祝强
Owner 李文俊
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