Medium-strength fiber and processing equipment thereof

Abstract

The invention relates to a medium-strength fiber and processing equipment thereof, and belongs to the fiber manufacture technical field; the processing equipment comprises a screw extruder, a spinning box, a side blower mechanism, a spinning path, stretching setting rollers and a winding mechanism arranged in sequence; the screw extruder, the spinning box, and the spinning path are arranged in sequence from top to bottom; the outlet of the spinning path is provided with an oil nozzle use for oiling; the stretching setting rollers comprise four pairs of rollers; the first pair of rollers is arranged below the spinning path; the second pair of rollers is arranged behind the first pair of rollers; the third pair of rollers is arranged above the second pair of rollers; the fourth pair of rollers is arranged above the third pair of rollers; a vertical axis of the third pair of rollers passes the space between the first and second pairs of rollers; the third and fourth pairs of rollers are respectively provided with an insulation hot box. The processing equipment is applied to the medium-strength fiber processing, is table in spinning conditions, low in waste fiber rate, and high viscosity slices are employed in the medium-strength fiber processing, thus obtaining the medium-strength fiber with high intensity, low expansion and contraction property, and stable physical property.

Description

technical field [0001] The invention relates to a medium-strength yarn and processing equipment thereof, belonging to the technical field of fiber manufacturing. Background technique [0002] Medium-strength yarn refers to fibers whose breaking strength is between civilian yarn and fine-denier industrial yarn. Traditional medium-strength yarns are mostly produced on spinning equipment for civilian yarns, which are prepared by polyester (intrinsic viscosity slightly higher than civilian FDY) of about 0.70dl / g, or by a two-step method (POY-DY ) preparation, but civil silk spinning equipment usually only has two pairs of rollers, and the stretching and setting process has only one stage, so the orientation and crystallinity are low, the breaking strength is low (around 4.0cN / dtex), and the breaking elongation is large (around 30 %), poor dimensional stability; and in the filament forming process, the stretching and setting temperature is low, the fiber structure is unstable, a...

AI Technical Summary

Problems solved by technology

Traditional medium-strength yarns are mostly produced on spinning equipment for civilian yarns, which are prepared by polyester (intrinsic viscosity slightly higher than civilian FDY) of about 0.70dl / g, or by a two-step method (POY-DY ) preparation, but civil silk spinning equipment usually only has two pairs of rollers, and the stretching and setting process has only one stage, so the orientation and crystallinity are low, the breaking strength is low (around 4.0cN / dtex), and the breaking elongation is large (around 30 %), poor dimensional stability; and in the filament forming process, the stretching and setting temperature is low, the fiber structure is unstable, and it is easy to produce more wool filaments, and the spinning condition is unstable

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