Preparation method of super black polyester fiber through stock solution coloring melt direct spinning

Abstract

The invention discloses a preparation method of super black polyester fiber through stock solution coloring melt direct spinning, and belongs to the technical field of polyester fiber production. By using the technology, both the color blackness and the color fastness can be improved. The technology comprises the following steps of 1, selecting ethylene glycol and polyterephthalic acid to preparea mixture A; 2, adding a stabilizer into the mixture A, and then, performing heating to take an esterification reaction; 3, performing temperature reduction treatment, separating an esterified substance from water, adding EG, and performing stirring to obtain a mixture B; 4, performing pressurization treatment on the mixture B, and accelerating the stirring speed; 5, adding black color into the mixture B subjected to pressurization treatment, and continuously performing stirring at a constant-temperature state to obtain a mixture C; 6, simultaneously performing heating and pressure relief treatment; 7, performing polycondensation reaction treatment on the mixture C, performing polycondensation stirring in an environment with the stirring power of 50 Hz, and simultaneously performing vacuumpumping and slow heating treatment on the mixture C; 8, finally, adding an auxiliary agent bag into the mixture, and performing stirring; and 9, discharging materials, and performing pelletizing treatment.

Description

technical field [0001] The invention relates to the technical field of polyester fiber production, in particular to a method for preparing dope-colored melt direct-spun ultra-black polyester fiber. Background technique [0002] The printing and dyeing processing method of polyester fiber has good color and blackness, but the color fastness is not very good. However, the production of black PET fibers through the masterbatch method has good color fastness, no dyeing wastewater, low energy consumption for system processing, and is relatively ecological and environmentally friendly, but the blackness of the fibers cannot always approach or achieve the black effect of printing and dyeing processing; The production of black silk by the masterbatch method is also subject to two technical limitations: the carbon black used for fibers is limited, and the black masterbatch produced cannot be greatly improved; the addition of color masterbatch during spinning cannot be increased witho...

AI Technical Summary

Problems solved by technology

[0002] The printing and dyeing processing method of polyester fiber has good color and blackness, but the color fastness is not very good

However, the production of black PET fiber through masterbatch method has good color fastness, no dyeing wastewater, low energy consumption for system processing, and is relatively ecological and environmentally friendly, but the blackness of the fiber can never approach or achieve the black effect of printing and dyeing p