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Tech. of producing mulberry root bark pulp for making viscose fibre

A viscose fiber and production process technology, applied in the field of mulberry pulp production process, can solve problems such as complex process, difficult operation, unsatisfactory quality of mulberry fiber whiteness, etc., and achieve the effect of simple process and excellent performance

Inactive Publication Date: 2006-06-28
CHTC HELON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Morus genus Moraceae is a deciduous tree, the bast fiber content in the mulberry bark reaches 40-60%. In my country, the mulberry planting area is quite large and the resources are extremely rich. The mulberry tree is pruned and repaired, so that a large number of mulberry branches are cut. People generally only use it as firewood, or in papermaking, but in the production of viscose fiber, it is rarely used because of immature technology. In my country's patent: mulberry fiber and its preparation method and application (patent number: ZL95117638.2), a process for manufacturing mulberry fiber is disclosed. , softening, drying, carding, and packaging processes to produce mulberry fibers, but in this invention, not only the process is complicated, it is not easy to operate, but also the scouring and rinsing are all under a large bath ratio, and the scouring is under normal pressure. The rinsing is carried out at normal temperature, and the obtained mulberry fiber is not very satisfactory in quality such as whiteness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Put the raw material mulberry bark that meets the production needs after screening, cutting, cleaning, impurity removal and other preparatory processes into the digester, and use 25% of the relative absolute dry material in terms of NaOH, and the liquid ratio is 1:3. , heat up to 175°C within 60 minutes, and keep it warm for 240 minutes. After cooking, let off the residual liquid, and rinse the cooked mulberry bark to make it reach the dynamic viscosity of 20 ± 10mpa.s for cooking quality, while A Seed cellulose content ≥ 90%; after that, the cooked mulberry bark is beaten in a beater, using viscous beating, and the beating concentration is required to be between 5% and 10%, and beating for 30 to 90 minutes until there is no mulberry in the pulp. There are small pulp clusters; then the obtained slurry is desanded in a desander to remove impurities and fine fibers in the slurry; the slurry is chlorinated and bleached, using 4% relative to the absolute dry material The am...

Embodiment 2

[0014] The process steps adopted in this example are consistent with those in Example 1, except that when cooking in the process, the relative absolute dry material amount of NaOH is 23%, the liquid ratio is 1:4, and the temperature is raised to 170° C. within 100 minutes, and Insulate for 300 minutes; and when bleaching, use an effective amount of chlorine of 3% relative to the absolute dry material, and chlorinate for 50 minutes at a temperature of 48° C. and a pH value of 9 to 10.

[0015] Adopt the performance that is used to produce viscose fiber mulberry fiber in the mulberry pulp that above-mentioned embodiment obtains is: first kind of cellulose 96%, whiteness 79%, ash content 0.19%, iron content 16ppm, little dust degree 62mm 2 / mg, the alkali absorption value is 592, and its performance is excellent.

Embodiment 3

[0017] The process steps adopted in this embodiment are consistent with those in Example 1, except that when cooking in the process, the relative absolute dry material amount of NaOH is 25%, the liquid ratio is 1:3, and the temperature is raised to 173 ° C within 120 minutes, and Insulate for 180 minutes; and when bleaching, use an effective amount of chlorine of 4% relative to the amount of absolute dry material, and carry out chlorination for 50 minutes at a temperature of 48° C. and a pH value of 9 to 10.

[0018] Adopt the performance that is used to produce viscose fiber mulberry fiber in the mulberry pulp that the above-mentioned embodiment obtains is: first kind of cellulose 96%, whiteness 80%, ash content 0.21%, iron content 14ppm, small dust degree 80mm 2 / mg, the alkali absorption value is 611, and its performance is excellent.

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Abstract

The invention discloses a mulberry skin alpha pulp manufacturing method used to produce viscose fiber. It includes the following steps: preparing material; boiling; pulping; de-sending; bleaching; washing; manufacturing pulp. It can reduce material consumption. Its technique is simple. And it is convenient for practical application. And the produced mulberry skin fiber has good performance.

Description

technical field [0001] The invention relates to a chemical fiber technology in the field of textiles, in particular to a production process of mulberry pulp using mulberry bark as a raw material for producing viscose fibers. Background technique [0002] In the textile industry, chemical fibers are currently widely used as textile raw materials, and the development and use of chemical fibers are increasing day by day. According to statistics, so far, the production and use of chemical fibers in the world have accounted for 10% of the total amount of textile fibers. 50%, and there is still a growing momentum. Among them, viscose fiber accounts for a considerable proportion in chemical fibers. The manufacture of viscose fiber is mostly made of coniferous wood and broad-leaved wood as raw materials, so it needs to cut a large amount of wood, which will inevitably affect the natural environmental conditions and destroy the ecological balance, especially in a country like our co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C1/06D21C3/02D21C9/02D21C9/12D21D1/02
Inventor 王乐军李琳吕翠莲刘春龙
Owner CHTC HELON
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