Method for improving uniformity of products of spunbonded nonwoven fabric production line

Abstract

A method for improving uniformity of products of a spunbonded nonwoven fabric production line is characterized by including steps: (1) jetting, to be specific, allowing melt to enter a melt distribution pipe through a melt inlet of a spinning manifold, then enter a spinning component through a metering pump and finally be jet through holes of spinneret plates of the spinning component to form primary filaments; (2) stretching, to be specific, subjecting the filament bundles jet through the through holes of the spinneret plates of the spinning component to lateral blowing for cooling, and drafting through drafting devices; (3) filament swinging for web forming, to be specific, performing filament swinging for web forming after the filaments drafted by high-speed airflow are drafted by the drafting devices, wherein each spinneret plate of the spinning manifold is correspondingly provided with one drafting device. By adoption of the method, uniformity of fiber webs on two sides of a lapping machine can be effectively improved.

Description

technical field [0001] The invention relates to the field of nonwovens, in particular to methods for improving the uniformity of web formation. Background technique [0002] The most important physical index to measure the quality of spunbond nonwovens is the uniformity of the cloth surface, which directly affects the quality indicators such as product strength, uniformity of elongation and heat shrinkage. Tubular air drafting is a commonly used drafting method for spunbonded nonwovens production lines. The existing tubular air drafting production process has its own defects and deficiencies in the uniformity of the cloth surface. The spacing is the same, after the tow is wobbled, the amount of fiber web distributed in the width direction of the lapper is different. The amount of fiber web near the middle is more, and the amount of fiber web near the two sides is less. The uniformity of the fiber web is poor. In order to solve this problem, the existing method is to add edg...

AI Technical Summary

Problems solved by technology

Tubular air drafting is a commonly used drafting method for spunbonded nonwovens production lines. The existing tubular air drafting production process has its own defects and deficiencies in the uniformity of the cloth surface. The spacing is the same, after the tow is wobbled, the amount of fiber web distributed in the width direction of the lapper is different. The amount of fiber web near the middle is more, and the amount of fiber web near the two sides is less. The uniformity of the fiber web is poor. In order to solve this problem, the existing method is to add edge devices on both sides. Although this will improve the uniformity of the product, there is still a problem that the uniformity of the fiber web in the middle is good, and the uniformity of the two sides is poor. exist

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