A kind of preparation method of wool-like polyester fiber

A technology of polyester fiber and wool, which is applied in the field of wool-like polyester fiber preparation, can solve the problems affecting the continuity and safety of the production process, the rapid rise of filter pressure difference, and the reduction of filter life cycle, etc., to achieve guaranteed Spinnability, reduction of coordination, effect of reducing impurities

Active Publication Date: 2020-10-02
JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the addition of the third component in the CDP melt, its apparent viscosity is relatively large, and the impurities produced in the production process also increase accordingly, causing the pressure of some spinning components and the pressure difference of the filter to rise faster. There are carbonized cokes on the inner wall of the pipeline. These carbonized cokes adhere to the inner wall of the pipeline, which is easy to cause blockage of the pipeline system and is not easy to be removed, which brings great difficulties to the dredging of the pipeline. In addition, in the production of this kind of fiber In the process, the service life of the filter is greatly reduced, generally only one week, while the service life of some other spinning components is generally only 10 days, so frequent cleaning and replacement of the spinning components are required, which will not only increase the operating cost, but also Will affect the continuity and safety of the entire production process

Method used

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  • A kind of preparation method of wool-like polyester fiber
  • A kind of preparation method of wool-like polyester fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A preparation method of wool-like polyester fiber, the steps are as follows:

[0058] a) preparing a spinning melt;

[0059] (1) transesterification reaction prepares bishydroxyethyl isophthalate-5-sodium sulfonate;

[0060] First, dimethyl isophthalate-5-sodium benzenesulfonate and ethylene glycol with a molar ratio of 10:1 are put into the preparation kettle, and the catalyst Zn(Ac) is added. 2 Carry out the transesterification reaction at 175°C until the distilled amount of water reaches 90% of the theoretical value, and obtain bishydroxyethyl isophthalate-5-sodium sulfonate, which is then prepared by adding ethylene glycol and sulfuric acid to obtain 30wt % Ethylene glycol solution of bishydroxyethyl isophthalate-5-sodium sulfonate, in which the catalyst Zn(Ac) 2 The add-on of dimethyl isophthalate-5-sodium benzene sulfonate is 0.2wt% of the add-on of dimethyl isophthalate-5-sodium benzene sulfonate, when preparing, the mass concentration of the sulfuric acid that...

Embodiment 2

[0082] A preparation method of wool-like polyester fiber, the steps are as follows:

[0083] a) preparing a spinning melt;

[0084] (1) transesterification reaction prepares bishydroxyethyl isophthalate-5-sodium sulfonate;

[0085] First, put dimethyl isophthalate-5-sodium benzenesulfonate and ethylene glycol into the preparation kettle with a molar ratio of 11:1, add the catalyst Zn(Ac) 2 Carry out the transesterification reaction at 178 ℃ until the distilled amount of water reaches 92% of the theoretical value, and obtain bishydroxyethyl isophthalate-5-sodium sulfonate, and then add ethylene glycol and sulfuric acid for modulation to obtain 31wt % Ethylene glycol solution of bishydroxyethyl isophthalate-5-sodium sulfonate, in which the catalyst Zn(Ac) 2 The add-on of dimethyl isophthalate-5-sodium benzene sulfonate is 0.3wt% of the add-on of sodium benzene sulfonate, when preparing, the mass concentration of the sulfuric acid that adds is 45%, and the add-on of sulfuric ac...

Embodiment 3

[0104] A preparation method of wool-like polyester fiber, the steps are as follows:

[0105] a) preparing a spinning melt;

[0106] (1) transesterification reaction prepares bishydroxyethyl isophthalate-5-sodium sulfonate;

[0107] First, put dimethyl isophthalate-5-sodium benzenesulfonate and ethylene glycol into the preparation kettle with a molar ratio of 12:1, and add the catalyst Zn(Ac) 2 Carry out the transesterification reaction at 179 ℃ after the anti-ether agent NaAc until the distilled amount of water reaches 91% of the theoretical value, and obtain bishydroxyethyl isophthalate-5-sodium sulfonate, then add ethylene glycol and Sulfuric acid is modulated to obtain the ethylene glycol solution containing 32wt% bishydroxyethyl isophthalate-5-sodium sulfonate, wherein catalyst Zn(Ac) 2 The addition of dimethyl isophthalate-5-sodium benzene sulfonate is 0.25wt% of the addition of sodium benzenesulfonate. When preparing, the mass concentration of the sulfuric acid added i...

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Abstract

The invention relates to a preparation method of wool-imitating polyester fiber. The preparation method comprises the following steps of firstly, mixing dimethyl isophthalate-5-sodium benzenesulfonate, ethylene glycol and a catalyst, and performing ester exchange reaction; after reaction is finished, adding ethylene glycol and sulfuric acid for preparation; mixing terephthalic acid, the ethylene glycol, the catalyst, a stabilizer and calcium oxide-coated titanium dioxide particles, and performing etherifying reaction; then, adding a prepared product after finishing of the ester exchange reaction into an etherifying reaction system which has reached the end point of etherifying reaction, and performing condensation reaction, so as to obtain a spinning melt; finally, weighing the spinning melt, extruding, cooling, applying oil, tensioning, thermally shaping, and coiling, so as to obtain the wool-imitating polyester fiber. The preparation method has the advantages that the production of foreign matters in the polyester fiber production process is reduced, so that the pressure rise of a spinning assembly and a filter is reduced, the service cycle is extended, the continuity and safety in the whole production process are guaranteed, and the good economic value and popularizing value are realized.

Description

technical field [0001] The invention belongs to the field of polyester spinning and relates to a preparation method of wool-like polyester fiber. Background technique [0002] Wool fabric has always been a popular high-grade fabric in the clothing market because of its superior bulkiness, elasticity and drape. However, wool fabrics have poor light fastness, washing shrinkage and insect resistance, and the raw materials are poor, and the production cost is high. Wool-like fabrics developed by chemical fibers not only meet the performance required for clothing textiles, but also add more varieties of designs and colors while reducing production costs. Wool-like polyester fiber not only has the advantages of softness, fullness and crispness of wool fabrics, but also retains the characteristics of durability, easy washing and quick drying of synthetic fabrics, and has been a key research direction for product developers for many years. [0003] As the main raw material of chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/688C08G63/86C08K9/10C08K3/22D01D5/08D01D5/16D01D5/24D01D5/253
CPCC08G63/6886C08G63/866C08K3/22C08K9/10C08K2003/2241C08K2201/003D01D5/08D01D5/16D01D5/24D01D5/253D01F1/10D01F6/92
Inventor 柳敦雷陆佳颖孙宝维
Owner JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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