Production process for black nylon stretch yarns

Abstract

The invention relates to a production process for black nylon stretch yarns. The production process comprises the steps of proportional mixing of nylon chips and black master batches in a master batch mixer, melting in a screw extruder, metering with a metering pump, spinning with a spinning component, cross air blowing cooling, bundling and oiling, packaging, balancing, and texturing, wherein 4 to 10 weight percent of black master batches are added; the temperature of the extruder is 250 to 280 DEG C; the temperature of a spinning box body is 250 to 270 DEG C. The production process has the beneficial effects that differences between the relative viscosity, melting point and the like of the black master batches and those of the spinning chips are little, so that a melt is substantially stable, the black master batches can be uniformly mixed with the melt, the problems of floating yarns, yarn waste, looping yarns and the like during spinning are reduced, and produced black nylon stretch yarn products are deep black; the spinning process is greatly different from the conventional process, and the temperature of each area of the extruder is set to be 250 to 280 DEG C, so that carbon black in the black master batches can be uniformly dispersed in the melt, the melt is endowed with higher flowability, and the produced black yarns are uniform in color.

Description

technical field [0001] The invention relates to a production process of nylon black elastic yarn. Background technique [0002] With the improvement of environmental protection requirements, many dyeing factories downstream of nylon with high energy consumption and high pollution are gradually closed. Nylon dyed yarn is directly added with color masterbatch in the production process, so as to produce excellent yarn, which can be used directly by downstream customers in the process of use, without further dyeing, saving the dyeing and finishing process, which not only saves energy but also meets environmental protection requirements. . Therefore, nylon dyed yarn is more and more favored by the market, and various nylon companies have also begun to develop nylon dyed yarn. [0003] Nylon black elastic yarn is one of the most commonly used colored yarns. At present, some products are available on the market, but the blackness quality of nylon black elastic yarn produced in th...

AI Technical Summary

Problems solved by technology

[0003] Nylon black elastic yarn is one of the most commonly used colored yarns. At present, some products are available on the market, but the blackness quality of nylon black elastic yarn produced in the prior art is not high, and can only be used in the middle and low-end markets. One of the technical difficulties is that the amount of color masterbatch added cannot exceed 3% in terms of current technology. The addition of color masterbatch will bring great difficulties to spinning, and the relative viscosity and melting point of color masterbatch will affect the melt. Stability; and the conventional production method generally uses a small screw extruder to measure the color masterbatch, and the color masterbatch is added to the extruder and mixed with nylon slices to dissolve and spin, and the uniformity of dispersion is not ideal

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