JPS5831109A - Spinning and take-up of thermoplastic synthetic multifilament yarn - Google Patents

Abstract

PURPOSE:An extruded multifilament yarn is taken up at a specific angle with a certain tension at the yarn detouching point on the final taking-up roller to give filaments mutual appropriate entanglements and to permit uniform finishing oil application. CONSTITUTION:A thermoplastic multifilament yarn is extruded through the spinneret 1, cooled, oiled by means of the oiling device, taken up with the first 3 and the final taking-up rollers 4 at a prescribed speed, then wound up around the winder 6 wherein the multifilament yarn Y detouching from the final taking- up roller 4 is turned with the guide 5 so that the angle at the yarn-detouching point is adjusted to 65-76 deg. between the yarn-taking up direction and the axis A of the final roller rotation. Further, the winding conditions of the winder is controlled so that the taking up tension of the multifilament yarn Y from the final roller 6 becomes 0.03-0.08g/d right beneath the yarn-detouching point P.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for spinning and taking off thermoplastic synthetic multifilaments. More specifically, the present invention relates to a method of imparting conjugation properties to a thermoplastic synthetic multifilament while spinning and winding it.

Conventionally, when spinning and drawing thermoplastic synthetic multifilaments, sufficient conjugation properties have been applied to the multifilaments in order to prevent fuzz and yarn breakage in the subsequent drawing process and to enable efficient drawing. It is known that hz needs to be granted. As a means for imparting biconjugability to the spun multifilament, a method of imparting an oil agent and a method of imparting a fluid turbulence nozzle (interlaced nozzle) that is more entangled have been generally used. In the method of applying an oil agent, there is a limit to how much the conjugation property can be increased, and if the conjugation property is increased and the amount of oil agent attached is increased by rolling, the drawability will decrease and the number of fluffs and yarn breakage will increase. W.

After elongation, filamentous spots such as purpura appear on the filament.

on the other hand,#! Also in the method of adding intersection lines based on body processing.

Since the fluid treatment is applied to the filler material, which is easily deformed in the unstretched state, non-uniform orientation unevenness occurs in the filler material, which causes a decrease in the stretchability.
This results in the occurrence of filament unevenness such as filament Kf unevenness after drawing. Historically, it requires expensive fluid treatment equipment and 1. C1: Manufacturing costs are high because a large amount of compressed air is used.
There is also the problem of rising prices.

This invention was made by paying attention to such conventional problems, in that the spun multifilament separates from the first roller at the end.

When the angle θ between the multifilament take-out direction and the rotation axis of the final take-off roller is set to 65 to 76 degrees, the take-out force from the final take-off roller of the multifilament is set to 0.0.
3 to 0.0811/de, we have succeeded in solving the above problems.

The present invention will be explained below based on the drawings.

FIG. 1 is a schematic side view showing an example of an apparatus for carrying out the present invention. In FIG. 1, 1 is gold for spinning, 2 is an oiling device, 3 is a first take-off a-ra, 4 is a final take-off a-ra, and 5 is a deflection guide.

6 is wine goo, Y is thermoplastic synthetic multi-purpose material I
)・, C is the cooling air, ON is the rotation of the final take-up roller 4,
P is the yarn separation point from the final take-up roller 4 of the round filament Yfl.

After the spun yarn (thermoplastic synthetic round filament spun from gold 1) Y is cooled and solidified by cooling air CK from a spinning tube (not shown), it is oiled with oil 11 in an oiling device 2. First collection I Nora 3 and final collection ζ Gola 4
is taken at a predetermined degree by
r turns increased t'1. reactor. In this case, the multifilament Y that has left the final take-up roller 4 is moved in-plane by the deflection guide 5.

At the yarn separation point P of the final take-off roller 4, the take-out direction of the multi-filament film/)Y and the rotation/drawing A of the final take-off roller 4
The angle θ between the Furthermore, the unloading force of the multifilament Y from the final take-off row j4 measured just below the yarn separation point Pf1 was 0.05 to 0.
0 B, 9/de. By adopting such conditions, appropriate conjugation properties are imparted to the multifilamen (Y).

The reason why this invention imparts round filament (YK conjugation properties), improves drawability, and provides a drawn yarn with high drawability can be considered as follows. That is, when the multifilament Y is deflected at the yarn separation point P of the final take-up roller 4.

As shown in FIG. 2, the multifilament Y expands near the yarn separation point P, that is, the W point of the multifilament Y, and a slight twist is added to each single fiber.

Furthermore, among the single #JI males, some come into contact with the take-up roller 4 while others do not, resulting in a slight speed difference between the single #JI fibers. As these phenomena overlap, the single fibers are appropriately entangled, improving conjugation, and the oil applied by the oiling device 2 migrates uniformly, improving drawability and producing a uniformly drawn yarn. .

In this case, i/ is the take-out direction of the multifilament Y at the yarn separation point P of the final take-off roller 4 and the final take-off roller 4
It is necessary that the angle θ formed by the rotating wheel A is within a range of 65 to 76 degrees.

Outside this range, appropriate entanglement of the single M fibers cannot be obtained and the effect of improving stretchability cannot be obtained, and the pulling force of the multifilament Y from the final take-up roller 4 is 0.03 to 0.
．． 08 #/do 5- is required, and if this tension is too large, entanglement of single fibers will not occur and therefore conjugation will not improve.

No improvement in drawability was observed.On the other hand, if the J-clothing force was too small, the multifilament Y
This is unsuitable because the number of times the yarn wraps around the final take-up roller 4 and breaks the yarn increases.

Incidentally, the surface of the final take-up roller 4 is desirably finished with a %la surface, and if it has a satin finish, the intertwining of single fibers is insufficient and the effect of improving stretchability is relatively small.

As described above, according to the present invention, at the yarn separation point P of the final take-up roller 4.

Multifilament Yf) Take-out direction and final take-up roller 4
The angle formed with the axis of rotation A is 65 to 76 degrees, and
Multifilament Yf1 The unloading force from the final take-up roller is set to 0.03 to 0.08 g/d@, so that the single fibers are moderately entangled and the oil adhesion becomes uniform, and the drawability is significantly improved. Since there is no need to install special equipment such as a fibre-processing device (and there is no need to use a large amount of compressed air), it can be produced at low cost using a conventional spinning take-off device. It can be effective.

This invention will be further explained below using examples.

Example Polyethylene reflate having an intrinsic viscosity of 0.640 was melted at 290°C using the apparatus shown in Figure 1, discharged from a spinneret 1 having 72 pores, and cooled. assimilation,
After oiling, take off at a speed of 1180 m/min 219 d
o multifilament was wound up.

In this case, the angle θ between the take-out direction of the multifilament Y at the yarn separation point PK of the final take-off roller 4 and the rotation axis A of the final take-off roller 4, and the take-up force of the multifilament Y from the final take-off roller 4 are shown in the table below. Various changes were made as shown below.

100 packages each of Maru F-filament spun and drawn under each condition were prepared, 1 ordinary drawn and twisted yarn 1
000. i! J with a stretching ratio of 3.0 times.

The yarn was drawn and twisted for 255 minutes at a drawing speed of 1200 m/min 1r, and this was repeated 10 times to examine the drawability.

The results are shown in the table below.

*The yarn breakage rate is a measure of how many spindles are broken per 100 spindles of stretched and twisted jj&combined yarns, and the lower this value is, the better the stretchability is.

*The silk twisting rate indicates how many spindles per 100 spindles caused some of the single fibers in the multifilament to break and the single fibers were wrapped around the drawing roller when the yarn was drawn and twisted. The lower this value is, the better the stretchability is.

As is clear from this result, multi-fila meso) Y
The angle θ between the take-out direction and the rotation axis A of the final take-up roller 4 is 65 to 76 degrees, and the take-out force of the final filament Y from the final take-off roller 4 is 0.03 to
It is necessary to be 0.0B, 9/d@.

For comparison, the multifilament Y is not deflected on the final take-up roller 4, and the fluid i! ! Similarly, a drawing and twisting test was conducted on a yarn provided with a flow nozzle (interlaced nozzle) and multifilament YK entanglement was applied by fluid injection, and the result was a spinning wheel of 0.52% and a wrap rate α of 95%.

Some unstretched parts remained during stretching 9- However, the stretchability was poor.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an example of an apparatus for implementing the present invention, and FIG. 2 is a perspective view of the main parts thereof. 4...Final resignation a-ra 5...
Deflection guide Y...Thermoplastic synthetic multifilament P...Yarn separation point A...Rotary axis of thread end take-up a-ra 10- ¥ 1 Fig. 2 Fig. 4 50 −

Claims (1)

[Claims] t After spinning thermoplastic synthetic multifilament. When taking up and winding with the take-up roller, at the yarn separation point of the final take-up roller, the angle θ between the take-out direction of the full 4 filament and the rotational axis of the final take-up roller is set to 65 to 76 degrees, and the JIJ% of the multifilament is Pick-up roller or rano pick-up force? α03~a 08 II/da is the % characteristic of the thermoplastic synthetic multi-fiber l
tJ thread pulling method.