Web spreading method and device for preparation of filament non-woven fabric through wet spinning technique

Abstract

The invention discloses a web spreading method for preparation of a filament non-woven fabric through a wet spinning technique. The method comprises steps as follows: (1), preparation of filament fiber bundles; (2), drafting of the filament fiber bundles; (3), forming of uniform flaky fiber bundles; (4), conveying of the uniform flaky fiber bundles; (5), inclination compensation treatment on the uniform flaky fiber bundles; (6), spreading of a filament fiber web. The invention further discloses a web spreading device. A fiber web forming mechanism used for crossing and stacking the uniform flaky fiber bundles which are to fall on a web curtain in the breadth direction of the web curtain is arranged at an output end of a conveying roller, an inclination compensation mechanism used for transversely drafting the uniform flaky fiber bundles in an inclined state back and forth in the direction opposite to the fiber web forming mechanism when the fiber web forming mechanism moves is arranged between the conveying roller and the fiber web forming mechanism. With the adoption of the method and device, the wet fiber bundles can form a uniform flaky fiber web on the web curtain, wet-process web forming is realized, and the quality of the filament non-woven fabric is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabric production equipment, and in particular relates to a web laying method and device for preparing filament non-woven fabric by wet spinning technology. Background technique [0002] Filament non-woven fabrics are widely used in medical and health care, agriculture, industry, automobiles and other fields due to their excellent performance. Compared with short-fiber non-woven fabrics, filament non-woven fabrics can make non-woven fabrics thinner and stronger. At present, the preparation of filament non-woven fabrics mainly includes spunbonding and wet spinning. The filament non-woven fabric is prepared by the spunbond method. After the polymer has been extruded and stretched to form continuous filaments, the filaments are laid into a web, and the web is then self-bonded, thermally bonded, and chemically bonded. Or a mechanical reinforcement method to make the web into a non-woven fabric. T...

AI Technical Summary

Problems solved by technology

At the same time, CN 105420920 A and CN 105316869 A have also announced the technology and equipment for preparing pure seaweed fiber and pure chitosan fiber filament non-woven fabric based on wet spinning technology, although the filament non-woven fabric can be prepared by wet spinning However, due to the uneven laying of the filament fibers, the thickness of the filament non-woven products obtained after spunlace cannot be consistent. That is to say, the obtained filament fibers are directly Laying and stacking to prepare filament non-woven fabrics with uniform texture, uniform thickness and consistent strength, there is currently no technology that can do it

[0004] CN 103290616 A discloses the processing technology of needle-punched nonwoven fabric, which adopts 7-8 layers of netting to realize stacking, and CN 102776710 A discloses nylon spunbonded filament nonwoven fabric and its preparation method, which is dry spinning , after the fiber filaments are obtained by dry spinning, the air-flow stretching tube is used to stretch through the air-flow stretching method of the drafting channel and then lay the net. First, how to lay the net is not disclosed in detail, and secondly, the method is acupuncture reinforcement In order to prepare a thinner filament non-woven fabric with a certain strength, the needle punching method will puncture the fiber net, and this method is used in wet spinning, and the wet fiber output through the coagulation bath The tow cannot enter the air-drawing tube, and wet-forming cannot be achieved

[0005] The above-mentioned technology solves the traditional defect that filament non-woven fabrics cannot be prepared by direct laying of fiber filaments. The factor is that the wet fiber filaments obtained by wet spinning form a uniform sheet-like fiber network after entering the net curtain, with uniform thickness, so as to ensure that the non-woven fabric obtained after spunlace has uniform thickness and high strength. unanimous

[0006] Therefore, if you want to use the filaments obtained by the wet spinning technology to directly lay the net to prepare the filament non-woven fabric, you must realize the direct stacking and laying of the wet spinning. There is no record in the prior art, and the dry spinning Filaments prepared by filament technology are used for non-woven fabric preparation. The method of multi-layer laying of short fibers is not suitable for wet spinning, and the method of dry spinning air drafting for needle punching cannot be used for wet spinning filaments. The field of fiber spunlace reinforcement

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