Spinning process of cellulose fibre and integration apparatus

Abstract

The invention relates to a method for spinning cellulose fibers, comprising the following steps that: cellulose and organic solvent are mixed and dissolved, and mixture is obtained; the mixture enters into a section of air gap layer via a spinneret and ejected tows are blown and sucked by cooling air; the tows is brought into a precipitating bath via precipitating solution and led out by a spinning reel under the guidance of hauling equipment, wherein, the tows are blown and sucked by the cooling air by means of multi-layered laminar flow wind and the outlet velocity of the precipitating bath is between 20 and 150 meters per minute. The invention also relates to a device for completing the spinning method. By adoption of the spinning method and the spinning device, cellulose filaments or staple fibers obtained finally have uniform strength and elongation amount and the effect is also suitable for fibers with high or low size as well.

Description

technical field [0001] The invention relates to a cellulose fiber spinning method and integrated equipment. Background technique [0002] The fiber involved in the present invention is called Lyocell fiber, which is a kind of cellulose fiber produced by dissolving cellulose in an organic solvent and extruding the solution from a spinneret. [0003] The current production method of this kind of fiber is to mix cellulose in a solvent first, then heat the solution and extract part of the water under the condition of reduced pressure, so that the cellulose is dissolved in the solvent, and the cellulose in the solution is heated The continuous thin streams are extruded through the spinneret in the state, and these continuous thin streams are cooled by air and then enter the coagulation bath, so that the liquid cellulose can be coagulated to form continuous filaments. However, practice has proved that the prior art methods are unsatisfactory in the formation of filaments and the ...

AI Technical Summary

Problems solved by technology

In this invention, in order to be able to spin dense filament bundles, the thin stream extruded by the spinneret is cooled by cooling air in the air gap, but the method of blowing cooling air in this invention is used, due to the gap between the silk and the silk. The filaments are arranged in the same radial direction, which easily causes uneven force between the filaments, so that the resulting fibers are not uniform

[0007] In the Journal of Donghua University, Volume 29, No. 2, April 2003, the title "The Effect of Spinning Process on the Properties of Lyocell Cellulose Fibers with High Relative Molecular Mass" was published, and the paper showed through orthogonal experiments that the air gap and the number of spinneret holes will have a relatively large impact on the properties of cellulose. The larger the air gap length and the draw ratio, the higher the tensile strength and initial modulus of the fiber. At the same time, the number of spinneret holes has a greater impact on the fiber The mechanical properties of the spinneret also have a greater impact. The text shows that the more the number of spinneret holes, the flow path and internal stress of the spinning solution flowing through each hole are different, and the structure of each monofilament in the obtained fiber bundle is different. The larger it is, the lower the mechanical properties of the fiber will be caused

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