A kind of continuous preparation method of cellulose fiber

A technology of cellulose fibers and cellulose filaments, applied in the field of cellulose fibers, can solve the problems of restricting continuous and efficient preparation and promotion of cellulose fibers, unfavorable for subsequent development and application, and reducing fiber quality, and achieves stable preparation and optimization. Draftability, effect of reducing the degree of fibrillation

Active Publication Date: 2021-08-31
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-speed preparation means poor economic benefits, but with the increase of spinning speed, fiber fibrillation is obvious during the preparation process, coupled with serious damage to fibers by equipment, and poor uniformity, it is difficult to increase spinning speed
In addition, when cellulose fibers are prepared at high spinning speeds, the dry elongation is low and the fiber quality is reduced, which is not conducive to subsequent development and application, and limits the continuous and efficient preparation and promotion of cellulose fibers

Method used

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  • A kind of continuous preparation method of cellulose fiber
  • A kind of continuous preparation method of cellulose fiber
  • A kind of continuous preparation method of cellulose fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this example, the following continuous preparation method is adopted to continuously spin cellulose fibers at a speed of 700 m / min by adjusting the tension of the tow at each stage of preparation:

[0043] (1) The cellulose pulp and the NMMO aqueous solution are mixed, swollen, and dissolved to form a spinning stock solution with a cellulose content of 13%. The spinning temperature is 115°C, and the spinneret is extruded through a spinneret with a hole diameter of 0.08mm. , after being cooled by an air gap layer with a height of 80mm, a thin stream of stock solution is obtained, and the thin stream of stock solution is subjected to a forming tension of 0.75cN / dtex;

[0044] (2) The thin stream of stock solution of step (1) is entered into the high-speed coagulation system, and the speed of the coagulation bath is 600m / min, and the spray direction of the coagulation bath is consistent with the thin stream of stock solution (tow), so that the thin stream of stock soluti...

Embodiment 2

[0047] In this example, the following continuous preparation method is adopted to continuously spin cellulose fibers at a speed of 240 m / min by adjusting the tension of the tow at each stage of preparation:

[0048] (1) The cellulose pulp and the NMMO aqueous solution are mixed, swollen, and dissolved to form a spinning stock solution with a cellulose content of 9%. The spinning temperature is 95°C, and the spinneret is extruded through a spinneret with an aperture of 0.2mm. , after being cooled by an air gap layer with a height of 40mm, a thin stream of stock solution is obtained, and the thin stream of stock solution is subjected to a forming tension of 0.84cN / dtex;

[0049] (2) The stock solution trickle of step (1) is entered into the high-speed coagulation system, and the speed of the coagulation bath is 200m / min, and the coagulation bath injection direction is consistent with the stock solution trickle (tow), so that the stock solution trickle is drawn by the high-speed c...

Embodiment 3

[0052] In this example, the following continuous preparation method is adopted to continuously spin cellulose fibers at a speed of 450 m / min by adjusting the tension of the tow at each stage of preparation:

[0053] (1) The cellulose pulp and the NMMO aqueous solution are mixed, swollen, and dissolved to form a spinning stock solution with a cellulose content of 12%. The spinning temperature is 105°C, and the spinneret is extruded through a spinneret with an aperture of 0.3mm. , after being cooled by an air gap layer with a height of 60mm, a fine stream of stock solution is obtained, and the stock solution stream is subjected to a forming tension of 1.1cN / dtex;

[0054] (2) The thin stream of stock solution of step (1) is entered into the high-speed coagulation system, and the speed of the coagulation bath is 400m / min. Stretch down and solidify for molding, then the as-spun fibers are sent to the washing system, and the washed fibers are sent to the washing system and subjecte...

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Abstract

The invention discloses a continuous preparation method of cellulose fibers. The preparation method applies a forming tension of 0.1 to 1.9 cN / dtex to a thin stream of raw liquid obtained by extrusion through a spinneret and cooling through an air gap, and then the feeding speed is 80 ~1000m / min coagulation bath, and continue to apply a pulling tension of 0.075~1.5cN / dtex to the washed fibers in the washing system after the coagulation bath, and finally send it to the post-processing system to achieve continuous high efficiency at a speed of 80~1000m / min Fibres for textile products. The preparation method provided by the invention can significantly adjust the problems of obvious fibrillation, low fiber elongation, and poor fiber uniformity of cellulose fibers under high-speed traction, realize high-speed and high-quality preparation of cellulose fibers, and further greatly improve production efficiency. The production cost is reduced, and an efficient and continuous method for preparing cellulose fibers that is more suitable for industrialization is formed.

Description

technical field [0001] The invention belongs to the technical field of cellulose fibers, and in particular relates to a continuous preparation method of cellulose fibers. Background technique [0002] In the current industry, the spinning speed of the new solvent method cellulose staple fiber is about 40m / min, and the spinning speed of cellulose filament is below 200m / min, the production efficiency is low, the production cost is high, and it is difficult to promote large-scale and high-profit industrialization . Cellulose fiber is different from other types of fibers. Its easy fibrillation not only restricts the improvement of spinning speed, but also affects the stability of the production process and application fields of fibers. Low-speed preparation means poor economic benefits, but with the increase of spinning speed, fiber fibrillation is obvious during the preparation process, coupled with serious damage to fibers by equipment, and poor uniformity, it is difficult to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D13/00D01D5/06D01D4/02D01D5/12D01D10/06D01F2/00
CPCD01D5/06D01D5/12D01D5/26D01D10/06D01F2/00D01D13/00D01D4/02D10B2201/22
Inventor 李婷张晨曦程春祖张明明徐纪刚迟克栋
Owner CHINESE TEXTILE ACAD
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