Tingible spandex fiber and preparation method thereof

Abstract

The invention discloses a tingible spandex fiber and a preparation method thereof. The method comprises the following steps: (1) mixing a raw material polytetramethylene ether glycol with 4,4-diphenyl methane diisocyanate to react, so as to obtain a prepolymer, quickly adding dimethylacetamide to the prepolymer to form a solution; (2) carrying out special surface treatment on white carbon black, and then adding to a prepolymer solution to react, so as to obtain an oligomer solution with uniform white carbon black distribution; (3) reacting the oligomer solution with a mixed diamine chain extender, so as to form a polymer solution; (4) after adding an assistant sizing agent, stirring and curing so as to prepare a spinning raw solution, and spinning to obtain the tingible spandex fiber. By adopting the tingible spandex fiber and the preparation method disclosed by the invention, the problem that the spandex fiber is not easily colorized is solved, and the gliding property, the unwinding property and the oiling uniformity of the spandex fiber are improved.

Description

technical field [0001] The invention relates to a functional chemical fiber and a manufacturing method thereof, in particular to a preparation method of an easy-to-dye spandex fiber. Background technique [0002] Spandex is a kind of polyurethane elastic fiber, known as "fabric monosodium glutamate", and there is a saying in the industry that "no ammonia can't make cloth". It can be seen that spandex is one of the key factors to improve the quality of fabrics. However, during the dyeing process of spandex fiber, it is difficult to color, which is mainly caused by the high polymer structure of spandex fiber. The high polymer structure is composed of hard segment and soft segment. The polarity of the soft segment is weak, but the force on the dye molecules is poor, so the spandex fiber is difficult to color and the color fastness is low. With the continuous improvement of the living standard of the people, the aesthetic concept of consumers is constantly improving, and the co...

AI Technical Summary

Problems solved by technology

961159911.X introduces a method of introducing acid seat at the end of molecular chain, but due to the requirement of molecular weight, the amount of addition is limited, and the effect of printing and dyeing is average

200710015248.5 introduced a chain extender with acid seat, but it is easy to embed in the hard segment micro-domain, or limited by the rebound requirement, the addition amount is limited, and it cannot achieve a good printing and dyeing effect

In addition, the above two methods narrow the scope of dye selection and bring a lot of inconvenience to the printing and dyeing process.

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