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Method for improving reactivity of dissolving pulp for viscose

A reactive performance, viscose fiber technology, applied in the direction of cellulose pulp post-treatment, fiber raw material treatment, artificial filament made of viscose, etc., can solve the problem of low reactive performance of dissolving pulp, to improve the reactive performance, ensure The effect of physical strength

Active Publication Date: 2016-01-20
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for improving the reactivity of dissolving pulp for viscose fibers, which solves the problem of low reactivity of existing dissolving pulp

Method used

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  • Method for improving reactivity of dissolving pulp for viscose
  • Method for improving reactivity of dissolving pulp for viscose
  • Method for improving reactivity of dissolving pulp for viscose

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1: Poplar pre-hydrolyzed sulfate dissolving pulp, ultrasonic treatment time 60 seconds, processing power 700 watts, pulp concentration 1.0%, ultrasonic frequency 25KHz. The measurement results are shown in Table 1.

[0039] Table 1

[0040]

Embodiment 2

[0041] Example 2: poplar wood sulfite dissolving pulp, ultrasonic treatment time 90 seconds, processing power 560 watts, pulp concentration 0.5%, ultrasonic frequency 25KHz. The measurement results are shown in Table 2.

[0042] Table 2

[0043]

Embodiment 3

[0044]Example 3: Masson pine pre-hydrolyzed sulfate dissolving pulp, ultrasonic treatment time 300 seconds, processing power 630 watts, pulp concentration 1.5%, ultrasonic frequency 25KHz. The measurement results are shown in Table 3.

[0045] table 3

[0046]

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PUM

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Abstract

The invention provides a method for improving the reactivity of dissolving pulp for viscose. Pre-hydrolytic sulfate dissolving pulp or sulfite dissolving pulp of needlebush or hardwood is adopted, 18 L of water is added into a pulp tank of a beater firstly, the pulp is slowly added, water is supplemented till the pulp concentration reaches 1.57%, dissolving is carried out for 30 min, and the pulp is concentrated till the mass concentration is 20-25%; a certain amount of the pulp is transferred into a beaker, water is added to dilute the pulp till the mass concentration of the pulp is 0.5-2%, the total volume is 200 ml, the mixture is evenly stirred and placed in ice bath for ultrasonic processing, ultrasonic frequency is 25 KHz, ultrasonic power is 10-900 W, total ultrasonic processing time is 1-15 min, and ultrasonic processing is carried out for 2 seconds every other 4 seconds; the processed pulp is filtered and aired under the constant-temperature and constant-humidity condition till the mass concentration is 95%. By means of the ultrasonic processing of the method, the reactivity of the dissolving pulp for the viscose can be improved, and the viscosity of the pulp is guaranteed.

Description

【Technical field】 [0001] The invention relates to a method for improving the reaction performance of dissolving pulp, in particular to a method for improving the reaction performance of dissolving pulp for viscose fibers. 【Background technique】 [0002] Dissolving pulp is a kind of refined chemical pulp, also known as refined pulp or pulp, which has the characteristics of high alpha-cellulose content, low hemicellulose and lignin content, and almost free of resin and ash. Dissolving pulp is mainly used in the textile industry and tobacco manufacturing industry, of which 60% is used in the production of viscose fiber for textile use. my country imported 1.8 million tons of dissolving pulp in 2013, and 2.09 million tons in 2014. It is estimated that the domestic demand for dissolving pulp (including dissolving pulp for other purposes) will exceed 3 million tons in 2015. In 2020, the global demand for dissolving pulp will be Reached 10 million tons. Therefore, in recent years,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/00D01F2/06
Inventor 苗庆显李亚丽黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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