JP2001303380A - Device for imparting interlacing of yarn and method for imparting interlacing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for imparting an interlacing generating an extremely small amount of a fuzz and a loop even when a high-pressure compressed fluid is used, capable of efficiently imparting the uniform interlacing, capable of uniformly redividing even with a small amount of an adhered oil agent and suitable for obtaining e.g. a polyester yarn for high-speed drawing and simultaneous false twisting. SOLUTION: A bent tube having 20-160 deg. bent angle is used as a conduit for the compressed fluid and a compressed fluid stagnating zone having >=0.8 time length based on the diameter thereof when the inlet side of the conduit for the compressed fluid is extended is installed at the bent part thereof. Furthermore, the angle formed by the running direction of the yarn and the jetting direction of the fluid is regulated to >=20 deg. and >=90 deg. in the device for imparting the interlacing configured by opening a fluid jetting hole on a yearn guiding hole so as to jet the compressed fluid from the fluid jetting hole to the yarn running in the yarn guiding hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a entanglement imparting device for imparting entanglement to a running yarn by injecting a fluid onto a running yarn and a method for imparting entanglement to the yarn using the device.

[0002]

2. Description of the Related Art A method of injecting fluid onto a running yarn to impart entanglement to the yarn is performed, for example, when weaving without twisting or gluing, or by mixing yarns having different properties. It is widely used when obtaining yarn, etc.
Apparatus and processing method therefor are disclosed in JP-B-55-670.
No. 30, JP-B-55-67029, JP-A-5-67029.
Various types have been proposed in, for example, JP-A-222640.

On the other hand, in recent years, the spinning / drawing speed has been increased, or these processes have been continuously attempted to streamline the production. Therefore, when entanglement is applied to the yarn, 2500 m / min. Thus, the yarn running at a high speed must be treated. In addition, the speed has been increased in the false twisting, especially in the simultaneous simultaneous drawing and twisting (hereinafter, sometimes referred to as simultaneous high-speed simultaneous drawing and twisting), and the bundle of the yarns for maintaining the process performance under high-speed conditions. However, since the improvement of the convergence by the oil agent causes the generation of tar and scum, a small amount of the oil agent is uniformly adhered and the yarn is entangled.

However, in the case of performing entanglement treatment on a yarn traveling at a high speed of 2500 m / min or more, or in the case of treating a yarn with a small amount of oil agent attached for simultaneous high-speed drawing false twisting to impart entanglement. At the same time, if the oil is redistributed and made uniform, the pressure must be 0.2 MPa
(2.0 kg / cm ² ) or more, a high-pressure compressed fluid must be jetted onto the yarn to obtain a sufficient treatment effect. However, in the conventional confounding device as described above, when a high-pressure compressed fluid having a pressure of 0.2 MPa (2.0 kg / cm ² ) or more is ejected, it is estimated that this is caused by fluctuations in the compressed fluid pressure and the fluid amount. As a result, not only does the variation in the number of confounds increase, but also the occurrence of loops and fluff on the yarn increases. In particular, when the yarn is a partially oriented polyester yarn (POY), the formation of the fiber structure of the yarn is still insufficient, so that fluff is more likely to occur and the pressure of the compressed fluid cannot be sufficiently increased.

Further, Japanese Patent Publication No. Hei 3-61772 discloses that
There has been proposed a confounding device that has three fluid injection holes and can provide a high number of confounds even when the pressure of the fluid is reduced. However, even if the yarn traveling at a high speed is treated using this device, the bunching property of the applied yarn is still insufficient, and the applied oil agent is redistributed to improve uniform adhesion. The effect of improving is also at an insufficient level.

[0006]

SUMMARY OF THE INVENTION The present invention has been made on the background of the above-mentioned prior art, and an object of the present invention is to inject a high-pressure compressed fluid to a running yarn so that generation of fluff and loops is extremely small. In addition, a uniform entanglement can be efficiently imparted, and even redistribution can be uniformly performed even with a small amount of oil agent attached, and in particular, an entanglement imparting device and an entanglement imparting suitable for obtaining a polyester yarn for simultaneous high-speed drawing false twisting. It is to provide a method.

[0007]

According to the study of the present inventors, the object of the present invention is to provide a method for forming a fluid injection hole in a yarn guide hole by opening a fluid injection hole in the yarn guide hole. A compressed fluid conduit connected to the fluid injection hole is formed into a bent tube, and the bent portion is compressed in the extension direction of the compressed fluid-containing side conduit of the bent tube. A fluid retention zone is provided, in which case the following requirements A to
C. A yarn entanglement imparting device characterized by simultaneously satisfying C. A: 20 ° ≤ θ1 ≤ 160 ° B: 20 ° ≤ θ2 <90 ° C: L ≥ 0.8D where θ1 is the bending angle of the bent part of the conduit, θ2 is the running direction of the yarn and the jetting direction of the fluid. L is the length of the retention zone in the direction of extension of the bent-tube compressed fluid inlet side conduit, D
Represents the diameter of the bent pipe containing compressed fluid. It has been found that this can be achieved.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial sectional view showing an example of the entanglement imparting device of the present invention. In FIG. 1, reference numeral 1 denotes a thread guide hole, and a fluid ejection hole is opened in the thread guide hole. The conduit of the compressed fluid connected to the fluid injection hole is such that the conduit 2A on the side to which the compressed fluid is supplied (upstream side) and the conduit 2B on the side where the compressed fluid is injected into the yarn guiding hole are at an angle θ1 with respect to each other. It is a connected bent tube, and further provided with a compressed fluid retention zone 3 in the extension direction of the conduit 2A.

The bending angle θ1 of the bent conduit shown in FIG.
If the bending angle is too small, not only is the effect of providing the compressed fluid retention zone reduced, but also the base material for forming the entanglement imparting device, such as ceramics, is not preferable because the processing accuracy is reduced. Becomes too large, the effect of providing the compressed fluid stagnation zone becomes insufficient, so that the bending angle θ1 is 20 ° or more and 160 °.
It is necessary to be less than or equal to (20 ° ≦ θ1 ≦ 160 °), especially 45 ° to 120 ° (45 ° ≦ θ1 ≦ 120 °)
Is preferable.

If the length L of the compressed fluid stagnation zone 3 is too short, the effect of providing the zone cannot be obtained, the compressed fluid cannot be uniformly jetted on the running yarn, and the number of entanglements in the lengthwise direction greatly varies. At the same time, the generation of fluff and loops also increases.
Must be at least 8 times (L ≧ 0.8D), especially
It is preferable to be in the range of 8D or more and 3.0D or less (0.8D ≦ L ≦ 3.0D).

The relationship between the diameter D of the conduit 2A and the diameter d of the conduit 2B is not particularly limited, but d / D is in the range of 1/3 or more to 1/1 or less. Is preferable from the viewpoint of further improving the uniformity.

In the present invention, in addition to the above requirements,
The angle θ2 between the running direction of the yarn and the ejection direction of the fluid is 2
It is necessary to be 0 ° or more and less than 90 ° (20 ° ≦ θ2 <90 °). By doing so, it is possible to efficiently impart confounding while suppressing the generation of fluff and loops, and it is possible to improve the uniform adhesion of the oil agent. When the injection angle is less than 20 °, the pressure of the injection fluid must be set higher because the number of entanglements that can be applied to the yarn is reduced, and the strength and elongation of the obtained yarn are reduced. However, it is not preferable because fluff and loops increase. On the other hand, when the angle is 90 ° or more, the amount of diffusion of the jetting fluid in the direction opposite to the yarn running direction increases, so that fluff and loops due to yarn slack at the entrance of the entanglement imparting device increase, which is not preferable. A more preferable injection angle θ2 is in the range of 45 ° to 85 °.

The diameter of the yarn guide hole, the diameter of the fluid injection hole, the number of the fluid injection holes, the flow path diameter D, and the like can be appropriately set according to the material, the fineness, the number of filaments, or the required number of confounds of the target yarn. I just need.

The confounding device of the present invention described above is
The pressure is 0.2MP by simply replacing with a known device conventionally used when performing the entanglement imparting treatment on the traveling yarn.
a (2.0 kg / cm ² ) or more and 0.6 MPa (6.0 k
Even if a high-pressure compressed fluid of g / cm ² or less is used, fluctuations in the fluid pressure and ejection amount are suppressed, so that confounding can be stably provided, and the generation of fluff and loops is small.
Also, since the redistribution property of the oil agent adhering to the fiber surface is also good, even if the amount of the oil agent adhering is reduced, it is possible to suppress the adhesion unevenness. Can be efficiently produced.

[0015]

The present invention will be described more specifically with reference to the following examples. In addition, each physical property value in an Example was based on the following measuring method. <Number of Confounds and Variation> The number of confounds was measured in measurement mode 3 using a YT-2 interlace measuring device manufactured by Teijin Engineering Limited. The measurement was repeated 10 times, and the average value and the variation were obtained. The average number of confounds was 10 pieces / m or more and the variation (difference between the maximum and minimum values of the number of confounds within the measured range) was 10 pieces / m or less. Those were judged good. <Warper fluff> 110 yarn packages were extracted and measured with a warping machine equipped with fluff and loop detectors, and the result was shown by the total number of fluff and loop per 1 million m. <Friction-drawing simultaneous false twisting (DTY workability)> The resulting package of 10 kg of partially oriented yarn was wound at 1,300 m / min using a 216-weight standing high-speed drawing simultaneous false-twisting machine (manufactured by Teijin Seiki Co., Ltd.). 5k
A one-month running test was performed under the conditions to obtain a g-twisted false twisted yarn. At this time, less than 2% of the yarn breakage rate was judged as a very good level, 2% or more and less than 5% as a good level, and 5% or more as a malfunction.

Examples 1 to 9 and Comparative Examples 1 to 5 A polyethylene terephthalate having an intrinsic viscosity of 0.63 at a melt spinning temperature of 290 ° C., having 36 holes and a hole diameter of 0.27 mm, or
It is melted and discharged from a spinneret having 48 holes and a discharge hole having a hole diameter of 0.35 mm, and after cooling and solidifying the discharged yarn, 0.3% by weight of an oil agent is applied. 0.35MPa using 2 injection holes)
(3.5 kg / cm ² ) of compressed air was injected to impart confounding, and then wound at a speed of 3300 m / min.

The obtained yarn package is a multifilament yarn having 36 filaments and a total fineness of 140 dtex, or a multifilament yarn having a filament number of 48 and a total fineness of 270 dtex.
10 kg winding package made of the multifilament yarn. Table 1 shows the results of the quality of the obtained yarn package and the high-speed drawing simultaneous false twisting property (abbreviated as high-speed DTY in the table).

[0018]

[Table 1]

[0019]

As described above, according to the entanglement imparting device of the present invention, even if the entanglement treatment is performed by injecting high-pressure compressed fluid onto the running yarn, uniform entanglement in the yarn length direction can be achieved. Can be imparted, and the generation of fluff, loops and the like is small.
In addition, when used in the manufacturing process of the partially oriented yarn, the oil can be uniformly redistributed by injecting a high-pressure compressed fluid, so that the amount of the oil applied can be suppressed to a low level. It is possible to stably obtain a raw yarn capable of performing simultaneous high-speed drawing and false twisting.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an example of a confounding device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yarn guide hole 2A Conduit on the side (upstream side) to which compressed fluid is supplied 2B Conduit on side where compressed fluid is injected into the yarn guide hole 3 Compressed fluid retention zone

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Osaka 77-77 Kitayoshida-cho, Matsuyama-shi, Ehime F-term in Teijin Limited Matsuyama Office (reference) 4L036 MA05 MA33 MA42 PA42 RA15 UA21

Claims (2)

[Claims] 1. A confounding device in which a fluid injection hole is opened in a yarn guide hole and a compressed fluid is injected from the fluid injection hole to a yarn running through the yarn guide hole. The fluid conduit is formed as a bent tube, and the bent portion is provided with a compressed fluid retention zone in the extension direction of the compressed fluid-containing conduit of the bent tube. At this time, the following requirements A to C are simultaneously satisfied. Characteristic yarn confounding device. A: 20 ° ≤ θ1 ≤ 160 ° B: 20 ° ≤ θ2 <90 ° C: L ≥ 0.8D where θ1 is the bending angle of the bent part of the conduit, θ2 is the running direction of the yarn and the jetting direction of the fluid. L is the length of the retention zone in the direction of extension of the bent-tube compressed fluid inlet side conduit, D
Represents the diameter of the bent pipe containing compressed fluid. 2. A pressure of 0.2 MPa (2.0 kg / cm)
² ) When the entanglement is imparted to the running yarn by using a compressed fluid having a pressure of not less than 0.6 MPa (6.0 kg / cm ² ), the entanglement imparting device according to claim 1 is used. Confounding method.