KR100314561B1 - Godet roller for dry type spinning device and dry type spinning method using the same - Google Patents

Abstract

PURPOSE: Provided are a godet roller for a dry type spinning device and a dry type spinning method using that which are characterized by having excellent surface fire-retardancy, heat resistance and chemical resistance, being possible to produce grey yarn of high quality, and having excellent workability. CONSTITUTION: The godet roller for the dry type spinning device is as follows: many longitudinal grooves(11) formed on a surface of the roll at equal intervals; many holes(12) formed on the inside of the grooves(11) at equal intervals; and a hollow part formed on the center of the roll and communicated to the holes(12) and a special vacuum apparatus. Vacuum level given to the godet roller is 1-50%.

Description

High speed roller for dry spinning equipment and dry spinning method using the same

1 is a device diagram schematically showing the configuration of a general dry spinning device

2 is a perspective view schematically showing an example of a high-pressure roller for implementing the present invention

FIG. 3 is a cross-sectional view taken along line A-A of the second degree high roller.

The present invention relates to an improvement of a dry spinning device for forming a polymer solution into filaments, and more specifically, a new type of high speed roller used in a dry spinning device, and excellent surface flame resistance, heat resistance, and chemical resistance by applying the same. The present invention relates to a method for producing a highly functional fiber material used in the environment, electrical and electronics, aviation industry and the like.

Dry spinning is one of the major manufacturing methods for producing synthetic fibers from soluble polymers. The apparatus for dry spinning is generally well known and applied in major manufacturers. 1, a general dry spinning apparatus is shown. In this dry process, the polymer solution at a constant temperature supplied from the spinning solution storage tank is discharged through a spinneret orifice (2), and the solvent in the discharged yarn is downwardly moved from the top of the spinning column (3). Evaporated by a high temperature inert gas which is supplied to the The hot gas supply in normal dry spinning supplies dry gas directly from a gas cylinder located in the circumferential direction outside the spin pack 1. The gas cylinder is attached with a partial device for uniform supply to a gas dispersion filter, a distribution plate, and the like. This is the close of the melt spinning Similar to the close quenching type. Particularly, in the case of dry spinning in the uniform yarn composition under the detention, the solvent is extracted by the use of a high temperature inert gas. In this way, the spinning of the yarns to be focused is carried out so that the extraction of the solvent is not perfect, and further cleaning and solidification of the yarns are required. Therefore, it is washed and solidified with pure water, and wound up. This causes shaking and stress of thread thread due to water film phenomenon of pure water, etc., resulting in phenomena such as thread trimming and cross-sectional defect, and difficulty in forming stable thread thread. Occurs.

In order to solve all the problems of the prior art as described above, the present inventors form a number of pores and grooves on the surface of the winding roller in the study to give a certain degree of vacuum, thereby removing the thread and accompanying water film of a special type. When using the resulted in a stable thread, it was found that excellent quality yarn can be produced with excellent workability.

Therefore, according to the present invention, in a high speed roller for a dry spinning device, a plurality of longitudinal grooves are formed at regular intervals around the roll surface, and a plurality of holes in the inner radial direction of the inner side of the longitudinal grooves are formed. It is formed at regular intervals, there is provided a high-speed roller for dry spinning apparatus, characterized in that the hollow portion is connected to the separate vacuum device in the center of the roll and communicates with the inner radial holes.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 and 3 show an example of a roller roller according to a preferred embodiment of the present invention. The high roller 10 of the present invention as shown is a plurality of longitudinal grooves 11 are formed at regular intervals around the roll surface, the inner surface of the longitudinal grooves 11 at regular intervals A plurality of holes 12 are formed and a hollow portion 13 is formed in the center of the roll which is connected to a separate vacuum device (not shown) and in communication with the inner radial holes.

Water jetted by the water jet is continuously transported in the direction of movement of the thread, adversely affecting the thread wound on the winder. Therefore, according to the high roller 10 of such a structure by separating the water contained in the thread with a vacuum imparted to the fine radial hole 12 formed in the longitudinal grooves 11 through the hollow portion 13 to the winder. It is possible to achieve stable physical properties and operability since water is not included in the yarn to be wound and solvent extraction is uniform.

The use position of the high roller 10 of the present invention can be used for all high rollers used between the water jet and the winder, the degree of vacuum applied to the high roller is 1 to 50%. If the degree of vacuum is less than 1%, the effect of the present invention is not seen, and if it exceeds 50%, the pressure applied to thread thread is excessive, causing thread thread non-uniformity.

Threads that go through rollers are usually wound on a winder without stretching. The yarns wound on the winder are stretched, solvent extracted, dried and solidified in a further process. At this time, the reason for performing solvent extraction again is that sufficient solvent extraction does not occur at the time of winding up to a winder.

As described above, according to the present invention, since the water film generated during the solvent cleaning and solidification of the yarns in the dry spinning is removed, the cross-sectional variation rate due to the uniform yarn in the multi-die dry spinning is improved, the denier is uniform, and the solvent extraction is also improved. Stability and operability are improved.

Hereinafter, the present invention will be described in more detail by way of non-limiting examples.

[Examples and Comparative Examples]

After defoaming the polymer solution consisting of 20 kg of meta-aramid, 10 kg of calcium chloride, and 100 kg of dimethylacetamide, the high-pressure roller 10 of FIG. 2 and the dry spinning value of FIG. 1 using the conventional high-pressure roller were used. Dry spinning was carried out.

The odd number of detention was 180 pieces, the temperature of nitrogen supplied was 300 degreeC, and the flow volume was 50 kg / hr. Spinning was performed at a discharge amount of 150 g / min, a spinning solution supply temperature of 120 ° C., and a winding speed of 300 m / min.

About the manufactured yarn, the cross-sectional variation rate, denier, workability, and scatter which were measured and evaluated by the following method were measured. The measurement results are shown in Table 1 below.

Section variation rate: Measurement of section variation status (less than 15% is good)

Denier uniformity: good denier, target value ± 5.0%

Operability: Full drum rate (F / D rate)

Suit Drum: Full D.M)

Undressed drum: Partial D.M

Saran: Assessed by the throat

-Evaluated by shaking state investigation of the lower jail due to evaporation of solvent by high temperature gas.

Vacuum degree: The degree of vacuum is regarded as 100% when full vacuum is formed.

Evaluated by the shaking condition investigation of the movement.

TABLE 1

As can be seen from Table 1, even in the case of using the conventional spinning device and the high-pressure roller of FIG. 2, when the vacuum degree is 60 or 100, the cross-sectional variation rate and denier, workability, and disturbance are poor. In the case of using the high-pressure roller and the vacuum degree of 3, 8, 10 and 30, the cross-sectional variation was less than 15%, the denier was good, and the operability was considerably stable at 90% or more.

Claims (3)

In the high-speed roller for dry spinning apparatus, a plurality of longitudinal grooves 11 are formed at regular intervals around the roll surface, and a plurality of holes are spaced at regular intervals in the inner surface of the longitudinal grooves 11 in the radial direction. 12) is formed, the high-pressure roller for dry spinning apparatus, characterized in that the hollow portion 13 is connected to the separate long hole device (not shown) in the center of the roll and communicate with the inner radial holes (12). In the dry spinning method of winding a polymer through a high-speed roller after spinning and solvent extraction, a plurality of longitudinal grooves 11 are formed around the roll surface at regular intervals, and an inner radius is formed on an inner surface of the longitudinal grooves 11. A plurality of holes 12 are formed at regular intervals in the direction, and a hollow roller 13 is formed in the center portion of the roll, which is connected to a separate vacuum device (not shown) and has a hollow portion 13 communicating with the inner radial holes 12. Dry spinning method characterized in that using (10). The dry spinning method according to claim 2, wherein the degree of vacuum applied to the roller is 1 to 50%.