KR900002760B1 - Spin beam apparatus for manufacturing synthetic material p.o.y. monofilament yarns - Google Patents

Abstract

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Description

Spin Beam Apparatus for Manufacturing P.O.Y Monofilament Yarn of Synthetic Fiber

(Missing drawing)

1 is a side view schematically showing a spin beam apparatus for manufacturing P.O.Y monofilament yarns of synthetic fibers according to the prior art.

FIG. 2 is a schematic side view of a spin beam apparatus according to the present invention in which the apparatus of FIG. 1 is adapted to produce monofilament yarns by a P.O.Y system. FIG.

* Explanation of symbols for main parts of the drawings

1: Extrusion system 2.2a: Exit projection

3: filament yarn 3a: multifilament yarn

3b: monofilament yarn 4: freezer

5: diffusion film 6: nozzle

7a: Seal Guide 8: Tube

8a: tube lower end 9,9a: coiling bobbin machine

A: cooling air

The present invention relates to a chipin beam apparatus for producing monofilament yarns of synthetic fibers using a P.O.Y system.

In general, in the field of manufacturing synthetic fiber yarns, monofilament yarns were mainly manufactured using only non-oriented-yarn (NOY) or medium-oriented-yarn (MOY) systems, but until recently, POY ( The use of pre-oriented-yarn systems has been considered almost impossible.

Here, in comparison with the above system, the "winding speed" of the yarn extruded in a plastic state (amorphous state) from the spinnerette provided at the upper end of the spin beam and the "elongation" applied to the yarn are It is different from each other as shown in Table 1 below.

TABLE 1

The table shows that the P.O.Y system is significantly more advantageous than the N.O.Y or M.O.Y system in the production of monofilament yarns. It is advantageous to use the P.O.Y system because the elongation of the yarns produced using the system is so low that the residual stresses applied to the yarns appear small.

For this reason, P.O.Y. It can be seen that the number of breaks per fixed length of the yarn produced using the system is less, the quality and yield of the yarn produced are better, and more importantly, P.O.Y. The weight of the bobbin is much heavier than the weight of N.O.Y or M.O.Y.

Moreover, although producers of synthetic fiber have recently recognized that it is more convenient to manufacture monofilament yarns with POY systems, they still use POY systems to achieve high quality and high yield (e.g., fewer breaks per 100 km of yarn). It has been considered impossible to be able to manufacture a thread.

Accordingly, the present invention is to effectively and simply solve the conventional problems as described above, by applying a POY system to manufacture a synthetic fiber yarn with a spin beam device of the Samsung fiber that can improve the quality or yield of yarn It is an object of the present invention to provide a spin beam apparatus for manufacturing POY monofilament yarn.

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

1 is a conventional apparatus (spin beam) used for producing yarn from synthetic fibers such as polyamide, polyester or polypropylene, and the reference numeral 1 denotes an extrusion system, at the tip of which is a number of calibration hoses. An exit projection 2 is provided (not shown in the figure).

In the exit projection 2, the number of corrective horns is two or more, and the diameter thereof is 0.15 to 0.30 mm.

Referring to the process according to this, the molten plastic material flows through the calibration hole of the exit projection (2), the filament yarn 3 (only 4 shown in the drawing) is a freezing chamber into which the cooling air (A) flows in an amorphous state It flows downward along the inner side of (4), wherein the cooling air (A) introduced into the freezing chamber (4) passes through the diffusion membrane (5) to cool the filament yarn (3) as well as to crystallize the synthetic material. Done.

In the prior art, a plurality of nozzles 6 (one filament yarn bundle each) are provided at the bottom of the exit projection 20 by a predetermined distance, so that mulzone is applied to each bundle of filament yarn in the required amount of spin processing. To be provided.

For example, in the related art, the nozzle 6 is provided below the exit projection 2 by about 300 to 1.700 mm, and on the contrary, is installed about 500 to 8,000 above the winding bobbin 9.

On the other hand, the filament yarn (3) is wetted by the nozzle (6), and then continue to move downward in the form of a bundle in the interior of the freezing chamber (4), the multifilament yarn (3a) in the tube (8) ), And is finally emitted through the tube bottom end (8a). At this time, the winding bobbin machine 9 winds the multifilament yarn 3a at a speed V of 4,000mts / min or more as a device having a constant winding speed (or any other conventional form).

FIG. 2 is a schematic side view of the spin beam of FIG. 1 suitably adapted in accordance with the present invention, using P.O.Y. It is a device capable of producing a monofilament yarn in the form.

Here, the exit protrusion 2a has an area of about 600 to 1,000 mm ² and the diameter of one hool (not shown) is about 0.40 mm. Extruded, moving downward along the inner surface of the freezer compartment 4, monofilament yarns (only three are shown in the drawing: 3b) are produced and the monofilament yarns 3b are introduced by the incoming freezing air A. It is cooled in the same manner as the conventional method. The monofilament yarn 3b continues to descend through the tube 8 and then exit through the tube lower end 8a.

According to the present invention, the lower end of the tube 8a is provided with a conventional seal guide 7a, which recovers the monofilament yarn 3b and serves to guide it to the wound bobbin 9a. do.

As a result of your testing using these devices, it is difficult to produce high quality yarns if the monofilament yarns 3b are wetted with the nozzles 6 in the same application range (distance of 300 to 1700 mm from the exit projections). okay.

Therefore, as a result of testing the position of the nozzle 6 away from the exit projection 2a, a spin-emulsion zone is applied in the vicinity of the winding bobbin 9a, that is, just under the tube 8a. It was found to be good, and it was possible to produce monofilament yarns 3b, for example POY monofilament yarns, at speeds faster than 4,000 m / min. For example, the nozzle 6 is provided between the tube lower end 8a and the seal guide 7a so that the P.O.Y monofilament yarn 3b is wound directly by the winding bobbin 9a. In other words, the present inventors installed the nozzle 6 above 1,500 to 2,500 mm from the horizontal axis of the take-up bobbin 9a to wet the POY monofilament yarn with mulzone in spin processing, and 2,500 from the exit projection 2a. It was found that it is better to install the lower side to 6,500mm. These have not been considered to date and not possible in the prior art and cannot be implemented.

On the other hand, in the present invention, the diameter of one hool installed on the distal end surface of the exit projection (2a) is 0.15 to 0.50mm and has a diameter of 25 to 800mm, 4 to 20% by weight relative to the oil as an emulsion oil By using the POY monofilament yarn of polyamide 6 or polyamide 66, which exhibits a minimum number of breaks per 100 km of yarn even under excellent quality, that is, a winding speed of 4,000 m / min or more.

The test results for the P.O.Y monofilament yarn obtained by the method according to the invention are shown in Table 2 below. For example, using different types of exit projections, varying the distance between the exit projections and the nozzles, and varying the weight ratio of the number of breaks and oil in the emulsion zone for the yarn of 600 Kms (corresponding to 1 kg of yarn). It was.

TABLE 2

Claims (3)

In the spin beam apparatus for manufacturing POY monofilament yarn of synthetic fibers, the nozzle is installed 2,500 to 6,500 mm below the exit projection and the winding speed of the monofilament yarn can be more than 4,000 m / min. Spin beam apparatus for producing monofilament yarns. 2. The apparatus according to claim 1, wherein the exit projection has an area of about 600 to 1,000 mm ² and the diameter of the hool formed on the tip surface thereof is 0.15 to 0.50 mm. The apparatus of claim 1, wherein the nozzle contains a spin beam processing emulsion containing from 4 to 20% by weight based on oil.