A kind of preparation method of cellulose fiber tow

A cellulose fiber and cellulose technology, applied in the field of spinning, can solve the problems of poor spinning stability, affecting spinning output, doubling and breaking of filaments, avoiding doubling, excellent appearance and uniform speed. high sex effect

Active Publication Date: 2022-04-22
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fineness of the monofilament of the cellulose filament bundle, if a spinneret with a high hole density is used, it is very easy to produce the problems of doubling and breaking, and the stability of spinning becomes poor, which greatly affects the spinning output and also Affect production capacity

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment provides a method for preparing cellulose fiber tow, the specific steps are as follows:

[0049] (1) After mixing cellulose pulp with a degree of polymerization of 600 and NMMO aqueous solution, it is swollen and dissolved to prepare a transparent solution, and then filtered and defoamed to obtain a cellulose spinning solution. The cellulose concentration of the spinning solution is 8 wt%, and the temperature of the spinning solution is 100°C.

[0050] (2) The spinning liquid is metered by a metering pump, enters the spinning box, and extrudes a fine spinning stream from the spinneret hole of the spinneret, and the extrusion speed is 10m / min. The temperature of the spinning box is 95° C., and the number of holes in the spinneret is 10,000.

[0051] (3) The obtained fine spinning stream, after passing through an air gap with a height of 20 mm, enters the wide funnel for solidification and drafting to obtain cellulose fiber tow.

[0052] The width of the...

Embodiment 2

[0054] This embodiment provides a method for preparing cellulose fiber tow, the specific steps are as follows:

[0055] (1) After mixing cellulose pulp with a degree of polymerization of 600 and NMMO aqueous solution, it is swollen and dissolved to prepare a transparent solution, and then filtered and defoamed to obtain a cellulose spinning solution. The cellulose concentration of the spinning solution is 6 wt%, and the temperature of the spinning solution is 95°C.

[0056] (2) The spinning liquid is metered by a metering pump, enters the spinning box, and extrudes a fine spinning stream from the spinneret hole of the spinneret, and the extrusion speed is 10m / min. The temperature of the spinning box is 95° C., and the number of holes in the spinneret is 25,000.

[0057] (3) The obtained fine spinning stream, after passing through an air gap with a height of 20 mm, enters the wide funnel for solidification and drafting to obtain cellulose fiber tow.

[0058] The width of the ...

Embodiment 3

[0060] This embodiment provides a method for preparing cellulose fiber tow, the specific steps are as follows:

[0061] (1) After mixing cellulose pulp with a degree of polymerization of 600 and NMMO aqueous solution, it is swollen and dissolved to prepare a transparent solution, and then filtered and defoamed to obtain a cellulose spinning solution. The cellulose concentration of the spinning solution was 18 wt%, and the temperature of the spinning solution was 110°C.

[0062] (2) The spinning liquid is metered by a metering pump, enters the spinning box, and extrudes a fine spinning stream from the spinneret hole of the spinneret, and the extrusion speed is 10m / min. The temperature of the spinning box is 95° C., and the number of holes in the spinneret is 5000.

[0063] (3) The obtained fine spinning stream, after passing through an air gap with a height of 20 mm, enters the wide funnel for solidification and drafting to obtain cellulose fiber tow.

[0064] The width of th...

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Abstract

The invention discloses a method for preparing cellulose fiber tow, comprising: (1) mixing cellulose with an organic solvent to obtain a cellulose spinning solution; (2) extruding the cellulose spinning solution through a spinneret out, through the air gap layer, into the coagulation bath of the wide funnel, and solidify and draw in the accelerating fluid to obtain cellulose fiber tow; wherein, the length of the wide funnel in the horizontal direction is 300-2000mm. The invention utilizes a wide-width funnel to prepare Lyocell tow, and a plurality of monofilaments pass through the wide-width funnel to form a curtain, and the monofilaments are arranged in parallel without entanglement. The tow prepared by the invention has good mechanical properties and more excellent appearance, and can be used for wide-width and high-yield spinning to improve production capacity; in addition, it can also be used to prepare long-tow nonwoven materials.

Description

technical field [0001] The invention belongs to the technical field of spinning methods, in particular to a method for preparing cellulose fiber tow, in particular to a method for preparing Lyocell tow by using a wide-width funnel. Background technique [0002] Cellulose fiber tow is one of the important raw materials of my country's textile industry. It is a representative variety of high-end textile fibers and is mainly used in high-end clothing fabrics, tire cords, embroidery threads, etc. The technological process of preparing cellulose fiber tow by the new solvent method solves the environmental pollution problem of traditional cellulose tow production from the source. The prepared cellulose tow not only has the characteristics of natural fibers (hygroscopicity, air permeability, comfort, biodegradability, etc.), but also has better fiber strength, which has obvious advantages over traditional viscose tow; It is beneficial to post-processing such as weaving, dyeing and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/00D01D5/06D01D13/00D01D13/02
CPCD01F2/00D01D13/00D01D5/06D01D13/02
Inventor 郭翠彬程春祖张帆高文战安康代欣欣孙玉山徐纪刚
Owner CHINESE TEXTILE ACAD
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