Copolymerized aramid dope-dyed yarn and method for preparing same

A technology of dope dyeing and aramid fiber, applied in the direction of adding dyes in spinning solution, single-component copolyamide rayon filament, adding pigment in spinning solution, etc. Small, deteriorating dyeing performance and other problems, to achieve the effect of improving color strength and preventing the reduction of polymerization degree

Active Publication Date: 2016-08-24
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the conventional technique poses a problem that the produced co-aramid fiber has deteriorated dyeing properties due to high crystallization properties despite the advantage of not using a sulfuric acid solvent
However, this method brings about many problems such as a decrease in the degree of polymerization of the copolymerized aramid polymer, a decrease in the solubility of the polymerization solution, and deterioration of the color fastness of the prepared dope-dyed yarn.

Method used

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  • Copolymerized aramid dope-dyed yarn and method for preparing same
  • Copolymerized aramid dope-dyed yarn and method for preparing same
  • Copolymerized aramid dope-dyed yarn and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0080] Will contain 3wt.% CaCl 2 The N-methyl-2-pyrrolidone (NMP) organic solvent injects in the reactor under nitrogen atmosphere, then in this reactor, the p-phenylenediamine of 50mol% and the cyano-p-phenylenediamine of 50mol% are introduced and dissolved to Prepare mixed solutions.

[0081] Then, 100mol% of terephthaloyl chloride and 0.3wt.% of C.I. Basic Black 2 (relative to the weight of the copolymerized aramid fiber) were simultaneously added to the reactor including the mixed solution to prepare a mixture containing the copolymerized aramid fiber Polymerization solutions of polymers.

[0082] Thereafter, after the polymerization solution was extruded through the spinning spinneret, the air gap and the coagulant were sequentially passed through the spinning spinneret, thereby forming multifilaments having a linear density of 3,000 denier. The spin pack pressure was 2,800 psi and the spin speed was 600 mpm (meters per minute).

[0083] Thereafter, the multifilaments ...

Embodiment 2

[0086] Will contain 3wt.% CaCl 2 The N-methyl-2-pyrrolidone (NMP) organic solvent was injected into a reactor under a nitrogen atmosphere, and then 100 mol% of cyano-p-phenylenediamine was introduced into the reactor and dissolved to prepare a mixed solution.

[0087] Then, 100mol% of terephthaloyl chloride and 1.5wt.% of C.I. Basic Blue 22 (relative to the weight of the copolymerized aramid fiber) were simultaneously added to the reactor including the mixed solution to prepare a mixture containing the copolymerized aramid fiber Polymerization solutions of polymers.

[0088] Thereafter, after the polymerization solution was extruded through the spinning spinneret, the air gap and the coagulant were sequentially passed through the spinning spinneret, thereby forming multifilaments having a linear density of 3,000 denier. The spin pack pressure was 2,800 psi and the spin speed was 600 mpm (meters per minute).

[0089] Thereafter, the multifilaments were washed, and then the wa...

Embodiment 3

[0092] Will contain 3wt.% CaCl 2 The N-methyl-2-pyrrolidone (NMP) organic solvent injects in the reactor under nitrogen atmosphere, then in this reactor, the p-phenylenediamine of 50mol% and the cyano-p-phenylenediamine of 50mol% are introduced and dissolved to Prepare mixed solutions.

[0093] Then, 100mol% of terephthaloyl chloride and 3wt.% of C.I. Basic Blue 64 (relative to the weight of the copolymerized aramid polymer) were simultaneously added to the reactor including the mixed solution to prepare a polymer containing the copolymerized aramid fiber. polymer solution.

[0094] Thereafter, after the polymerization solution was extruded through the spinning spinneret, the air gap and the coagulant were sequentially passed through the spinning spinneret, thereby forming multifilaments having a linear density of 3,000 denier. The spin pack pressure was 2,800 psi and the spin speed was 600 mpm (meters per minute).

[0095] Thereafter, the multifilaments were washed, and th...

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Abstract

The present invention relates to a copolymerized aramid dope-dyed yarn and a method for preparing the same. When a copolymerized aramid yarn is prepared by adding terephthaloyl dichloride to an organic solvent in which an aromatic diamine having a cyano group is dissolved, followed by a reaction, to polymerize a polymerization solution containing a copolymerized aramid polymer, and then spinning and solidifying the polymerization solution, a copolymerized aramid dope-dyed yarn is prepared by adding a dye having a cation during the polymerization process of the polymerization solution containing the copolymerized aramid polymer. Deterioration in the polymerization degree of the copolymerized aramid polymer or deterioration in the dissolubility of the polymerization solution due to the addition of the dye to the polymerization solution can be effectively prevented. Further, according to the copolymerized aramid dope-dyed yarn and the method, when a copolymerized aramid polymer having a cyano(-CN) group and a dye having a cation are bonded by a hydrogen bond to form a liquid crystal during the polymerization process of the polymerization solution containing the copolymerized aramid polymer, the behavior together with a main chain of the copolymerized aramid polymer is possible, thereby enhancing the color strength, color fastness to light, and color fastness to washing of the copolymerized aramid doped-dyed yarn.

Description

technical field [0001] The present invention relates to a kind of co-polymerized aramid fiber stock solution dyed yarn and its preparation method, more specifically, relates to a method of spinning a polymerization solution containing a co-polymerized aramid fiber polymer by using a spinning spinneret by mixing in the polymerization solution Cationic pigments without the use of sulfuric acid to prepare co-aramid dope dyed yarns with excellent color strength and color fastness. Background technique [0002] Aromatic polyamides are generally called aramids, and include para-aramids having a structure in which benzene rings are linearly linked by amide groups (-CONH) and meta-aramids having a linking structure different from the para-aramids . [0003] The para-aramid has excellent properties such as high strength, high elasticity and low shrinkage. Since para-aramid has high enough strength that a thin cable with a thickness of about 5mm can lift a two-ton vehicle, it is wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/06D01F1/04D01F6/80D01F6/60
CPCD01F1/06D01F6/605D01F6/805D01F1/04D10B2401/20
Inventor 李泛薰蔡宥利
Owner KOLON IND INC
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