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Method for producing cotton pulp for acetate fibre

A technology of acetate fiber and production method, applied in the direction of artificial filament made of viscose, etc., to achieve the effects of reducing water consumption, occupying less land, and producing flexible varieties

Active Publication Date: 2011-07-20
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a production method of cotton pulp for acetate fiber aiming at the above disadvantages in the production method of cotton pulp for acetate fiber. The present invention especially solves the problems existing in the cooking and beating process in the preparation process of cotton pulp , the cotton pulp provided has the characteristics of good uniformity, low energy consumption, high efficiency and low pollution, so that the produced cotton linter acetate fiber can reach products superior to the national standard, and the degree of polymerization can be in the range of DP 800-2000 Arbitrary control within

Method used

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  • Method for producing cotton pulp for acetate fibre
  • Method for producing cotton pulp for acetate fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] When producing products with a high degree of polymerization, that is, when the DP is 1500-2500;

[0028] After the slurry is discharged from the twin-screw refiner, it is washed, desanded, and made. Its technological process is:

[0029] A. After the cotton linters are opened, add water to moisten the cotton during transportation to the twin-screw refiner, and measure during the transportation;

[0030] B. The wetted cotton linters enter the twin-screw refiner, add water again before the forward spiral in the first stage of the machine, wash the cotton linters, squeeze them in the reverse spiral area and drain through the filter plate, and drain them in the second stage Add water and wash again; in the above two sections, the linters are squeezed, rubbed and cut off, and the dryness of the slurry is controlled, and the liquid medicine is added in the third section, mixed with the linters quickly, cut off again, and Control the dryness of the discharged slurry;

[00...

Embodiment 2

[0047] When producing products with medium and high degrees of polymerization, that is, DP: 1000-1500;

[0048] After the slurry is discharged from the twin-screw refiner, it is temporarily stored in the silo or directly enters the second group of twin-screw refiners for the second washing, liquid mixing, and beating processes in the twin-screw refiner, and then automatically The twin-screw refiner is discharged, and the process of washing, desanding and copying is carried out. Its technological process is:

[0049] A. After the cotton linters are opened, add water to moisten the cotton during transportation to the twin-screw refiner, and measure during the transportation;

[0050] B. The wetted cotton linters enter the first twin-screw refiner, add water again in the forward spiral area of ​​the machine, wash the cotton linters, squeeze in the reverse spiral area and discharge the washing water through the filter plate , and control the dryness of the slurry, add water in t...

Embodiment 3

[0078] When producing products with a low or medium degree of polymerization, that is, when DP: 500-1000;

[0079] After the slurry is discharged from the twin-screw refiner, it is temporarily stored in the silo or directly sent to the batch cooker for cooking. After the cooking is completed, the washing, bleaching, sand removal and copying processes are carried out. Its technological process is:

[0080] A. After the cotton linters are opened, add water to moisten the cotton during transportation to the twin-screw refiner, and measure during the transportation;

[0081] B. The wetted cotton linters enter the first twin-screw refiner, add water again before the forward and reverse spirals in the first section of the machine, wash the cotton linters, add water in the second section and then wash; in the above two sections , the linters are squeezed, rubbed and cut off, and the liquid medicine is added in the third section, and quickly mixed with the linters;

[0082] C. After...

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Abstract

The invention discloses a preparation method of cotton pulp for acetate fibre. The method comprises the steps of using cotton linter as a raw material, opening the cotton, cutting, washing, mixing liquid medicine, reacting and manufacturing with the pulp; after opening the cotton, sending the cotton linter to a double-roll pulping machine, accomplishing the cutting, washing and liquid medicine mixing steps in the double-roll pulping machine to form slurry; after the liquid medicine is mixed uniformly, putting the slurry in a bin to perform a reaction, and finally obtaining the cotton pulp foracetate fibre. The product is specially used for production of high-quality acetate fibre, comprising acetate fibre filament yarns, cigarette holder textile cables, electronic display screens, plastics and photographic films. The invention uses the double-roll pulping machine to replace multiple sets of apparatuses in the traditional technology. The cotton pulp for acetate fibre prepared by the method of the invention has the characteristics of good evenness, low energy consumption, high efficiency and low pollution.

Description

technical field [0001] The present invention relates to the production method of cotton pulp for producing viscose fiber, and the present invention is especially suitable for the production of acetate fiber. Background technique [0002] The development of acetate fiber has a history of nearly a hundred years. Since the British invented the industrialization of cotton pulp to produce acetate fiber in the 1920s, the production of acetate fiber requires that the polymerization degree distribution of cotton linters be as narrow as possible, while cotton linters Due to the short growth cycle, wide distribution of the degree of polymerization and low degree of polymerization, the cotton linters have high quality requirements, and because the traditional high temperature and high pressure cooking is used to remove the impurities of the cotton linters and destroy the secondary wall of the fiber, the primary Wall, etc., lead to severe degradation of fibers, resulting in a sharp drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/06
Inventor 冯涛薛勤徐发祥于渭东刘爱兵蒲运龙
Owner YIBIN GRACE GROUP CO LTD
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