Natural color fluff pulp and preparation method thereof

A technology of fluff pulp and natural color, which is applied in the fields of cellulose raw material pulping, natural cellulose pulp/paper, textiles and papermaking, etc. It can solve the problems of human health hazards, human health hidden dangers, and large environmental pollution, and achieve raw material consumption Low, comprehensive utilization rate protection, the effect of protecting the atmosphere and soil environment

Inactive Publication Date: 2014-06-11
BEIJING ZHENGLI HENGFENG PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Serious pollution to the environment and undue harm to human health
[0009] The existing production of bleached fluff pulp is mainly dominated by coniferous tree species, which is destructive to forests, the raw materials a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Cooking (anthraquinone-caustic soda method)

[0085] The cotton stalks are crushed by a hammer crusher, and then the cotton stalk skin or long cotton stalk sections are further cut by a grass cutter, and the length does not exceed 3cm. Fully mix with cotton linters (three-way velvet) (the mass ratio of cotton stalk to cotton linters is 7:3), put it into a steaming ball, add cooking liquid into the steaming ball, and the amount of alkali used is calculated by sodium hydroxide For 13% of the absolute dry raw material, the amount of anthraquinone added is 0.8% of the absolute dry raw material, the liquid ratio is 1:3, the first heating is raised to 175°C, and the temperature is kept at this temperature for 45 minutes, and then the steam is released for 20 minutes. Minutes, secondary heating for 50 minutes to a temperature of 170°C, and heat preservation for 70 minutes. After cooking, a high-hardness pulp with a Kappa value of 33 was obtained.

[0086] Washing and dust re...

Embodiment 2

[0101] Cooking (anthraquinone-caustic soda method)

[0102]The bagasse is disintegrated by a hammer crusher, put into steamed balls, and the cooking liquid is added to the steamed balls, the amount of alkali used is 13% of the absolute dry raw material amount calculated by sodium oxide, and the amount of anthraquinone added is 13%. The amount of dry raw materials is 0.8%, the liquid ratio is 1:3, the first heating is raised to 175°C, the temperature is kept at this temperature for 45 minutes, and the steam is released for 20 minutes, and the second heating is raised for 50 minutes to the temperature of 170°C. 70 minutes. After cooking, a high-hardness pulp with a Kappa value of 32 was obtained.

[0103] Washing and Purification

[0104] The high-hardness pulp is adjusted to a concentration of 12% by adding the recovered water after the second-stage washing, and sent to the screw press machine for extracting black liquor for squeezing. After squeezing, a high-hardness pulp wi...

Embodiment 3

[0117] Oxygen delignification

[0118] The natural color coniferous wood pulp board of Jinxing brand purchased in the market is disintegrated by a high-consistency hydraulic pulper, and the pulp concentration is adjusted to 15%. The sodium hydroxide with a dry pulp content of 3% and the sodium hydroxide with a dry pulp content of 1.5% are processed by a screw conveyor. The magnesium sulfate solution is fully mixed with the slurry, heated to 70°C by passing through low-pressure steam and delivered to the medium-consistency slurry pipe. The pulp is subjected to tempering treatment in the medium-consistency pulp pipe first, the air in the pulp is removed to make it fluidized, and medium-pressure steam is passed into the pulp pipe to heat to 93°C, and 22KG / ton dry pulp is added through an oxygen mixer. A certain amount of oxygen, with a pressure of 1.0Mpa, is delivered to the oxygen delignification reactor, and the pressure is kept at 0.40Mpa to stay for 80 minutes, so that the pu...

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Abstract

The invention aims to provide a natural color fluff pulp which is really healthy and environmentally friendly. The natural color fluff pulp is characterized by being prepared from one raw material or a plurality of raw materials through mixing, and has performance parameters meeting the fluff pulp national standard GB/T21331-2008. The materials adopted by the natural color fluff pulp are not blanched, not added with a brightener or a color developing agent during the production process; a natural color fluff pulp product does not contain cancerogenic substance such as dioxin or adsorptive organic halide, harm to the human body and pollution to the environment caused by chemicals used in the blanching or brightening process are eliminated, 100% natural color of plant fiber is kept; the natural color fluff pulp is applicable to the field of hygienic products; a manufactured hygienic product has excellent performances and improved practicability; the natural color fluff pulp is sanitary, safe and environmentally friendly, and has good protection property for physiological hygiene and physical and psychological health of the human body.

Description

technical field [0001] The invention relates to a natural fluff pulp and a preparation method thereof. More specifically, the invention relates to the production of natural fluff pulp from unbleached plant fibers, which belongs to the technical field of pulping. The natural fluff pulp is suitable for but not limited to the field of disposable hygiene products. Background technique [0002] Fluff pulp, used as pulp for absorbing liquid medium, is wrapped with polymer water-absorbent resin (SAP) to form the absorbent layer of absorbent hygiene products, which has good water absorption performance and remains unchanged after absorbing liquid. It is an essential raw material for the production of various absorbent sanitary products (such as: sanitary napkins, sanitary pads, diapers, disposable nursing mattresses, etc.). [0003] At present, the fluff pulp in the prior art is mainly bleached softwood fiber. my country's forest resources are scarce. According to the "Jiangnan Ti...

Claims

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Application Information

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IPC IPC(8): D21C3/00D21H11/00
Inventor 刘桂雨
Owner BEIJING ZHENGLI HENGFENG PULP & PAPER
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