Spun dyeing meta-aramid short fiber and its preparation process

A technology for dyeing aramid staple fiber and stock solution, which is applied in the direction of spinning solution preparation, wet spinning method, and adding pigments to spinning solution, which can solve the influence of fiber dyeing performance, application limitations of meta-aramid fibers, and dyeing difficulties And other issues

Active Publication Date: 2006-10-18
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the heat-treated crystallized fiber improves some physical and mechanical properties of the fiber, it affects the dyeing performance of the fiber, making it difficult to dye, thus limiting the application of meta-aramid fiber in the field of clothing

Method used

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  • Spun dyeing meta-aramid short fiber and its preparation process

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Embodiment Construction

[0031] The specific embodiments of the present invention are given below to illustrate the present invention, but should not be regarded as limiting the present invention.

[0032] according to figure 1 As shown, the preparation method of the dope dyed meta-aramid staple fiber in this embodiment is implemented according to the following procedures:

[0033] 1. Carry out solution polymerization with monomer m-phenylenediamine and monomer isophthaloyl chloride (IPC) in a system where an amide compound is an organic solvent, and use anhydrous NH 3 Carry out pre-neutralization, filter the obtained ammonium chloride, add IPC for the second time, and neutralize to obtain the spinning stock solution;

[0034] The spinning solution used before wet spinning is a low-salt spinning solution, and isophthaloyl chloride is added twice during the polymerization reaction to make the inherent viscosity of the spinning stock solution ≥ 2;

[0035] A, after adding isophthaloyl chloride for the...

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PUM

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Abstract

The present invention relates to spun dyeing meta-aramid short fiber and its preparation process, and belongs to the field of aramid short fiber and its preparation technology. The preparation process includes the following steps: 1. synthesizing meta-aramatoc polyamide solution as the spinning fluid; 2. pre-treating selected colorants, matching color and dispersing to obtain coloring fluid in proper concentration; 3. mixing the spinning fluid and the coloring fluid; 4. wet spinning the mixed fluid to form continuous tow by means of water solution coagulation bath at 10-35 deg.c; and 5. water washing, stoving, heat treatment, curling and cutting. The pigment of the present invention is treated into grain and agglomerate, whose maximum diameter determines the physical and mechanical performance, spinnability and post-processing performance of the fiber, and is water insoluble and organic solvent insoluble, resulting in no loss during the fiber production.

Description

1. Technical field [0001] The invention relates to colored meta-aramid short fibers and a preparation method thereof, and belongs to the technical field of aramid short fibers and preparation methods thereof. 2. Background technology [0002] When the meta-aramid used for spinning fibers is wet or dry spun, in order to make the produced fibers have acceptable physical and mechanical properties, the fibers must be thermally drawn, that is, to allow the fibers to reach Thermal treatment at the state of the glass transition temperature of the polymer produces a certain degree of crystallization. Although the heat-treated crystallized fiber improves some physical and mechanical properties of the fiber, it affects the dyeing performance of the fiber, making it difficult to dye, thus limiting the application of meta-aramid fiber in the field of clothing. 3. Contents of the invention [0003] The purpose of the present invention is to provide colored meta-aramid staple fibers, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/04D01D1/02D01D5/06D01F6/60
Inventor 宋翠燕宋西全王中平
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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