JPS605688B2 - Manufacturing method of intertwined curled yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing intertwined curled yarn,
The present invention provides a method for producing effectively entangled crimped yarn while minimizing the consumption of compressed air.

Techniques for entangling multifilament yarns, particularly multifilaments, using fluid turbulence are well known. In general, multifilament yarns are obtained in a non-clustered state, which causes many problems during the weaving and weaving process or the preparation process. I was being searched for. However, this method has low productivity and requires a lot of manpower, so in recent years, as an alternative to twisting and gluing, the so-called "interlace" technology has been developed, which attempts to bundle multifilament yarns by intertwining them in a single machine. filament yarn manufacturing process,
Particularly, some methods of interlacing treatment during the stretching process or the false twisting process are about to be put into practical use. The fluid entanglement treatment of multi-twill yarns is advantageous in that it can be performed continuously at high speeds, and when applied to the production process of crimped yarns, individual filaments are dispersed and entangled. Because of this state, there is an effect of improving the centering property and reducing the torque of the wound warp as a whole.

The present invention relates to a method for producing a crimped yarn that takes advantage of the excellent characteristics of the fluid entanglement treatment, and its purpose is to: {1} carry out a relaxation heat treatment after false twisting, develop crimping, and To provide a crimped yarn that has been subjected to so-called "modification processing" in order to reduce torque, '21 This wound warp has each filament intersecting, and therefore has a highly concentrated property, making it difficult to handle. To provide a wound warp with excellent properties, bulkiness, and properties;
One of the objects of the present invention is to provide a method for producing a crimped yarn that has the effect of reducing torque; and [4] to provide a method for producing a crimped yarn that can reduce the amount of compressed air consumed in the cross-crossing process.

In order to achieve the above object, the present invention runs false-twisted thermoplastic synthetic fibers in a substantially relaxed state between a pair of adjacent drive roll systems. When performing crimp development by heat treatment and entanglement treatment by fluid, the entanglement treatment is performed by a fluid entanglement treatment device provided upstream of the heat treatment device.

The mounting position of the fluid entanglement processing device was obtained as a result of confirmation through many experiments, and its details will be explained using the stretching false twisting device shown in FIG.

FIG. 1 illustrates the generally used process for manufacturing crimped yarn by stretching and false twisting, in which 1 is an undrawn yarn package, 2, 5, and 7 are drive rolls, and between 2 and 5, stretching is performed. The speed is set so that

3 is a heat fixing device, 4 is a false twisting spindle, and 6 is a heat treatment device, which performs modification processing.

8 is a winder.

The undrawn yarn pulled out from the undrawn package 1 by the drive roll 2 is twisted by a false twisting spindle 4 located upstream of the drive roll 5 which is faster than the drive roll 2, and during this time is stretched by the speed difference between the drive rolls. The fibers are heat-set by a heat-setting device 3 while being heated to obtain a false twisted curled yarn, and then passed through a drive roll 5 and heat-treated by a heat-treating device 6 to undergo a so-called "modification" process.
FIG. 2 is a cross-sectional view showing one example of a fluid entanglement processing device used in the present invention, and a main body 10 is joined to a base 9 to constitute the fluid entanglement processing device. A processing chamber 11 is provided in the center of the main body 10, and while the multi-filament yarn is passed through the processing chamber 11,
The entangling process is performed by the fluid (mainly compressed air) supplied and injected from the fluid supply hole 12 . Reference numeral 13 denotes a thread insertion slit, through which the thread is inserted into the processing chamber 11.

The fluid entanglement treatment device that can be used in the present invention is not particularly limited as long as it is a so-called "interlacer".

However, the so-called "Taslan" type fluid treatment device cannot be used because it forms loops, sag, etc. in the threads and reduces the concentration property. When the fluid entanglement treatment apparatus shown in FIG. 2 was attached to the stretched, false-twisted, curled yarn production process shown in FIG. 1 and the false-twisted yarn was entangled, the following was confirmed.

{i} Between the false twisting spindle 4 and the drive roll 5 (point A)
In other words, when the fluid entanglement treatment device is installed in a decombustion belt castle, the tension in this belt castle is usually higher than in other belt castles, and therefore the amount of compressed air must be increased. Since each single fiber could not move sufficiently due to the action of the fluid, it was not possible to perform a sufficient entanglement process.

If a flow entanglement treatment device is provided between the drive roll 5 and the heat treatment device 6 (point B) and the heat treatment device 6 is operated, sufficient entanglement treatment can be performed on the false twisted curled yarn. It is possible to produce a false-twisted curled yarn that is sufficiently modified and has high bulkiness.

It was also found that the amount of fluid required for the entanglement process may be small. Between the heat treatment device 6 and the drive roll 7 (point C)
If a fluid entanglement treatment device is provided and a heat treatment device is operated, there is no effect of reducing torque, which is one of the purposes of modification processing.

6. The tension between the drive roll 7 and the winder 8 (point D) is relatively high, and due to tension fluctuations in the winding section, the entangling tension does not become constant, making it impossible to perform a uniform entangling process. It is not preferable to provide a fluid entanglement treatment device at this location.

The fluid entanglement treatment device of the present invention needs to be provided together with a heat treatment device between a pair of adjacent drive rolls, and the fluid entanglement treatment device needs to be provided upstream of the heat treatment device. The reason why the fluid entanglement treatment device and the heat treatment device are provided between a pair of adjacent drive rolls is as follows. {1} Fluid entanglement by the fluid entanglement processing device "Interlacer" in the present invention tends to unravel due to loads such as tension and abrasion, but shrinkage of the yarn when applying curling by heat treatment in a relaxed state. The effect can stabilize confounding.

Therefore, it is necessary to introduce the yarn into the heat treatment chamber without contacting the entangled Goto motion roll. ■ By performing the fluid entanglement treatment of the present invention together with the heat treatment in a relaxed state, the shrinkage accompanying the winding of the yarn in the relaxation heat treatment castle has a buffering effect that absorbs unevenness such as fluctuations in the tension of the traveling yarn and fluctuations in the crimp rate. With this effect, uniform entangling processing can be performed without causing uneven entangling.

Next, the details of the present invention will be explained with reference to examples.

In addition, the degree of entanglement, crimp ratio, and torque coefficient in Examples were measured according to the following measuring method. Method for Measuring the Degree of Entanglement As shown in Figure 3, the sample is hung on a grooved sliding pulley 15 that can rotate from side to side without resistance around the center ball 14 so as not to get wet, and loads 16 and 17 are applied at two locations. .

The load shall be the total denier of the sample x 0.4 mm. Next, a fixed needle 18 having an outer diameter of 0.6 is inserted and fixed at substantially right angles between the single fibers constituting the thread. Next, a constant load 19 whose weight is equal to the monofilament denier of the sample x 2 is applied to the load 16 applied to the left side of the sample, and the sample is moved to the left until the constant load 19 catches the entangled portion and stops. Next, the constant load 19 applied to the load 16 is removed and the load 17 on the right side is added, and the applied sample is moved to the right by the constant load 19, so that the intertwined portion is caught on the fixed needle 18 and stopped naturally.

The moving speed of the sample due to the constant load 19 is 1 skin/sec. The distance traveled to the right of the sample by the above method is determined, and the CF value is calculated using the m formula.・〇〇CF=〆Ichimae...[1] Display the above operation as the average value of 20 line returns.

How to measure the crimping ratio: Make a skein with a circumference of 1 and 20 turns.
1500 with a load of 1.67k9/d applied to the lower end
Dry heat treatment for 0.5 minutes.

After cooling, remove the inside length of the skein. After measuring (arc), apply a load of 0.1/d to the lower end, and measure the inside length of the skein (
skin). The crimp ratio is calculated using the formula {1].

Curling rate (%) = 4 Yen and X・Sail---・Strong The measurement is performed 5 times and the average value is displayed.

[Measurement method of torque coefficient]

A sample yarn of approximately 1.3 mm is carefully bound so as not to untwist, and marked at intervals of 1 mm under a load of 0.1 mm/d of indicated denier.

Next, apply a load of 0.002 mm/d to the center of the mark and slowly fold it in half so that the marks are aligned. At this time, the sample yarn is rotated by torque and twists are inserted, so when the load in the center stops, fix the mark and the load part, set it on a twister, and measure the number of twists n inserted. .

The torque coefficient is expressed as n(T/M).

The measurement was performed 5 times and is expressed as the average value.

Example 3 An undrawn polyethylene terephthalate yarn of 250 denier and 48 filaments, which was graded at a speed of 2,000 min/min, was heated to 215 denier in a heat setting device 3 using the friction false twisting device shown in FIG.
Stretched at a stretching ratio of 1.9 times between drive rolls 2 and 5, 400 mm/m while applying a twist of 240 mm/m.
After drawing and pre-combusting at a processing speed of 1.5 in, a fluid entanglement treatment device having the cross section shown in FIG. 2 was installed at points B, C, and D in FIG. Confounding treatment was performed.

The modified eye processing by the heat treatment device 6 was carried out in a 15% relaxed state using a 190 qo hollow heater. The cross length, winding length characteristics, and torque coefficient of the obtained crimped yarn are as shown in Table 1.

Experiment No. 2 in Table 1 shows the characteristics of the pre-combusted crimped yarn according to the present invention when a fluid exchange total treatment device is provided at point B in FIG. It has a crimp rate and torque coefficient comparable to that of yarn (experiment number 1), and has an excellent degree of entanglement. , exhibits good weavability,
A good texture with no scratches or grains was obtained.

Experiment Nos. 3 and 4 show comparative examples, and Experiment No. 3 had a cross-sectional area similar to that of the present invention, but had a slightly lower crimping ratio and an extremely high torque coefficient than that of Experiment No. 1. showed that. When this crimped yarn was used as a warp yarn and subjected to untwisted and glueless weaving in the same manner as described above, there was a lot of unevenness, wrinkles, etc., and as a modified yarn, only a low-quality fabric belt was obtained. In Experiment No. 4, the degree of entanglement was low because there were uneven entanglements corresponding to fluctuations in the winding tension and there were parts that were not concentrated, and fuzz occurred when it was used for warp yarns for untwisted and unwoven weaving, so it was not satisfactory. It did not show good weavability.

As a result, the false twisted wound striped yarn according to the present invention, which has been subjected to the entanglement treatment by installing a fluid entangling treatment device at point B, has a high degree of entanglement, and has values similar to those of the conventional false twisted wound curled yarn in terms of winding uniformity and torque. It has been found that the fabrics woven using this method can be of extremely high quality. Further, according to the present invention, it has been found that the amount of fluid used can be relatively small in order to effectively perform the entanglement treatment. Comparative Example In order to clarify the effect of not having a drive roll between the fluid entanglement treatment device and the heat treatment device, the fourth example
The apparatus shown in the figure, i.e., the fluid entanglement processing apparatus having a drive roll 20 between the false twisting spindle 4 and the drive roll 5 of the apparatus shown in FIG. 1, and having the cross section shown in FIG. The fluid entanglement process was performed using

The experimental conditions were all the same as in the example except that the feed rate between the drive rolls 5 and 20 was set so that the yarn tension on the inlet side of the fluid entanglement treatment device was equal to that in the example. The results are shown in Table 2. Table 2 The degree of entanglement is lower than in Experiment No. 2 of the example in which the fluid entanglement treatment device and the heat treatment device are provided between a pair of adjacent drive rolls, and the degree of entanglement is lower in the entanglement treatment, which is one of the objectives of the present invention. No effect on reducing compressed air consumption.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the manufacturing process of a crimped yarn by a generally used drawing/false twisting process, Fig. 2 is a cross-sectional view showing an example of a fluid entanglement processing device used in the present invention, and Fig. 3 is a diagram showing the degree of entanglement. FIG. 2 is a schematic front view of the measuring device. FIG. 4 is a schematic diagram showing the manufacturing process of a crimped yarn by drawing and false twisting used in a comparative example of the present invention. 1...
・Undrawn yarn package "2, 5, 7, 20... Drive roll, 4... False twist spindle, 6... Heat treatment device, 8, 0... Winder, 9...・Base, 10・
...Fluid entanglement processing device main body, 11...Processing chamber, 12...Fluid supply hole, 13...Slit for thread insertion. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. False-twisted thermoplastic synthetic fibers are run in a substantially relaxed state between a pair of adjacent drive roll systems, and between these drive roll systems, curling is caused by heat treatment and entanglement by fluid is performed. 1. A method for producing an entangled crimped yarn, characterized in that the entangling treatment is carried out using a fluid entangling treatment device provided upstream of a heat treatment device.