JPS6233332B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a device that imparts cohesiveness to a running yarn by spraying a jet of fluid onto the running yarn and intertwining the constituent single fibers of the yarn. More specifically, the present invention relates to a highly efficient fluid entanglement treatment device for threads that can provide high convergence with a small jet amount. A method and device for performing an entangling process by jetting a fluid onto a running yarn is disclosed in U.S. Patent No.
It is known as shown in the specifications of No. 2985995, No. 3110151 and No. 3167847. However, after examining the details, we found that in this conventional method, the jet does not always act to promote intertwining, but only contributes to the intertwining process for a limited time under certain conditions. , it was an extremely inefficient process. Therefore, an object of the present invention is to provide a fluid entanglement treatment device for yarn that can improve the inefficiency of the prior art and obtain the maximum highly efficient entanglement effect with less jet energy. There is a particular thing. This purpose, according to the invention, consists of: (a) a yarn treatment area through which the yarn to be treated can pass in continuous running; (b) one end connected to a fluid supply source and the other end connected to said yarn treatment area. (c) a main jet supply nozzle that is opened in the middle of the main jet supply nozzle and that supplies a continuous fluid jet;
(d) a side hole having a fluid passage for adjusting the fluid flow of the main jet supply nozzle; (e) a resonance tube disposed at a position facing the main jet flow supply nozzle across a region; and (e) the yarn provided so as to come into contact with the yarn running in the yarn processing region together with the fluid during yarn treatment. This is achieved by providing an apparatus for fluid entanglement of yarn, comprising: a wall substantially surrounding a processing area; In the present invention, the pressure vibration wave refers to a flow having a frequency in the audible frequency range, specifically, 2000Hz.
It has been adjusted as below. In other words, the present invention actively utilizes the flow turbulence, vortices, etc. caused by the collision of the main jet and the sub-jet to entangle the yarn, and effectively utilizes the energy of the fluid to entangle the yarn. It is constructed so as to contribute to the confounding effect. In order to facilitate understanding of the present invention, first, the behavior of the yarn when a continuous flow jet is applied to the yarn while it is running will be explained. The inventors conducted an experiment to analyze the phenomenon of intertwining of single fibers that make up a yarn (high-speed photography, etc.)
According to the results, it was found that when a continuous jet is injected onto a running multifilament yarn, when the yarn crosses the jet, it opens and entangles at the same time. It was also found that the opened multifilament yarn exhibits a process in which individual single fibers become intertwined with each other due to the undefined motion of each single fiber being broken up by fluid force, resulting in entanglement. did. FIGS. 1A, B, and C are model diagrams showing the behavior of yarn due to jet flow. As shown in FIGS. 1A, B, and C, generally speaking, when a jet L is blown onto the multifilament yarn 1, the fluid force of the jet L causes the multifilament yarn 1 to
shows a state in which the jet L is blown between the yarn guides 2 and 2, as shown in 1a of FIG. 1A, but at this time, as shown in 1b of FIG. 1B, the multifilament yarn Maximum tension is reached when strip 1 is in the center of the jet flow line. Next, the multifilament yarn moves in a direction in which the restoring force generated by the elasticity of the yarn relieves the tension. At this time, whether the multifilament yarn 1 moves to the upper side 1c or the lower side 1d of the jet L in FIG. 1B depends on the tension of the multifilament yarn and the force of the jet applied to the multifilament yarn. Since it depends on the direction, it is not certain which side to move to. Next, when the tension of the multifilament yarn decreases, it repeatedly returns to the center of the jet due to the entrainment of the fluid force of the jet L, exhibiting string-like vibration behavior. However, when using the conventional treatment method, the first
In FIG. B, it has been confirmed by observation that the running multifilament yarn 1 has an extremely small chance of passing from 1c to 1d across the jet L. That is, when performing the entanglement treatment on the multifilament yarn, the force applied to the running multifilament yarn (hereinafter simply referred to as running yarn) by the jet L is greater than the above-mentioned restoring force. 1b-1c or 1b-1d in Figure 1B, and the first
As shown in Figure C, string vibration is performed on one side of the jet L in a region substantially parallel to the ejection direction of the jet L. Of course, it is at the center of the jet that the jet most strongly blows onto the running yarn, but as mentioned above, the actual behavior of the running yarn is such that the chance of being exposed to the center of this jet is extremely low. Therefore, the proportion of the energy of the jet flow consumed for entangling the multifilament yarns must be extremely low. FIG. 2 is a sectional view showing the main parts of a conventionally known yarn fluid treatment device. Yarn fluid treatment device 3 shown in Fig. 2 A, B, and C
, the jet L ejected from the nozzle 4 collides with the wall, and the multifilament yarn is formed in a yarn processing area having a limited cross section such as a circle, an ellipse, or a rectangle. 5
Exercise inside. At this time, there is a possibility that the multifilament yarn 1 crosses the jet L due to the entrainment of the vortex of the collision jet generated by the collision with the wall, but this vortex is forced to cross the jet L of the yarn. It is impossible to quantitatively grasp that it is effectively acting as a force. Moreover, it is natural that the cross-sectional shape and dimensions of the yarn processing area 5 are different.
Moreover, since the generation of vortices is unsteady, it is difficult to always expect the effect of vortices to act as a forcing force for the multifilament yarn to cross the jet stream. However, as described above, it is highly conceivable that the generation of vortices has a large effect on the manner in which single fibers are entangled with each other in a multifilament yarn. Therefore, the vortices generated within the limited yarn processing area 5 do not act as a forcing force that acts on the yarn running in the yarn processing area 5 to cause the jet to cross, but rather act as a force on each individual filament. As a result of each acting as an independent motion imparting effect, it is thought that the form of intertwining of single fibers is controlled. Based on the above observations, we conducted research and found that the multifilament yarn running in the yarn processing area surrounded by a wall reliably produces a continuous main jet. By causing a sub-jet having periodically intermittent pressure waves to collide with the main jet so as to be able to cross the main jet, an impinging flow having a resonance sharpness of 2 or more is formed at the exit of the yarn processing region, In this way, the energy of the fluid can be effectively applied to the yarn by actively using the flow turbulence and vortices generated by the collision of the main jet and the sub-jet to entangle the yarn. We have discovered that it is possible to provide an apparatus for producing entangled yarns that is not inferior in quality to entangled multifilament yarns produced by jetting fluid, and is also extremely advantageous in terms of cost and efficiency, since the fluid energy can be used extremely effectively. Ta. In the present invention, it is imperative that the continuous main jet and the intermittent secondary jets collide.
For example, as seen in Japanese Patent Publication No. 50-28533, the running yarn is simply mechanically traversed in a direction approximately perpendicular to the running direction so that the running yarn crosses the main jet flow. According to experiments conducted by the present inventors, mechanical methods have no significant effect on the degree of entanglement. In particular, when the tension of the running yarn during processing is low, the fluid force of the main jet is too strong, making it difficult for the running yarn to cross the main jet, and when the tension of the running yarn during processing is high, the running yarn Although it is possible to reliably cross the main jet, the degree of freedom between each single fiber of the multifilament yarn is reduced, making it difficult to cause fiber opening, and it is difficult to significantly improve the entangling effect. This is because it becomes difficult. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration and effects of the present invention will be described in detail based on the embodiments shown in the accompanying drawings. FIG. 3 is a sectional view illustrating the main parts of the yarn fluid treatment device according to the present invention. The yarn fluid treatment device 3 shown in FIG.
When a main jet flow M having a continuous flow is introduced from the main nozzle 7, a resonance chamber 11 is provided in the housing 6 at a position facing the main jet flow M, and the main jet flow M is injected, as a result, the main jet flow M is opposite to the main jet flow M. From the direction of
A sub-jet N, which is a flow having intermittent pressure oscillation waves, is generated, and the sub-jet N collides with the main jet M. This device connects the yarn processing region 5 and the resonance chamber 11 with a small-diameter sub-nozzle 8 so as to generate a low-frequency oscillating flow in the resonance chamber, thereby forming a Helmholtz-type resonator (hereinafter referred to as a resonance tube 19). It is something that The frequency of the subjet N is not particularly limited, but for yarns that have never been crimped, the denier (linear density) of the multifilament yarn, the distance between the guides in the running direction that regulates the yarn, An integer multiple of the natural frequency of string vibration determined by the string tension during processing,
Or, it is effective to set it to an integer fraction thereof to maintain vibration continuously. The present invention has a side hole 12 that opens into the main nozzle 7. That is, by adjusting the amount of fluid supplied from the side hole 12, the following has been found. The point is that the sharpness of fluid oscillation, that is, the resonance sharpness, can be adjusted. In other words, when there is no side hole, the sharpness of fluid oscillation is generally determined by the supply pressure. If there is a side hole, the sharpness of the fluid oscillation can be adjusted to be sharper or duller by adjusting the amount of fluid flowing in from the side hole. For example, making the sharpness of fluid oscillation dull means that there is sufficient fluid energy around the oscillation frequency at which fluid oscillation occurs, and that the oscillation frequency is sharp. , which means that the fluid energy is concentrated approximately at the oscillation frequency. When the main nozzle 7 does not have a side hole, the fluid pressure at the inlet of the resonance tube is determined by the fluid supply pressure. This means that once the dimensions of the fluid processing device are determined, the frequency range of fluid oscillations generated by the fluid supply pressure is approximately determined. It has been found that problems such as no fluid oscillation occur. Generally, in the entanglement treatment by jetting fluid to the running yarn, the greater the energy of the fluid applied to the running yarn, the higher the convergence can be obtained. Generally, as a method of increasing the energy of such fluid, the flow rate of the fluid from the main nozzle is increased, and therefore the supply pressure of the fluid is increased. Furthermore, in order to increase the momentum of the fluid, measures such as increasing the diameter of the main nozzle or increasing the number of main nozzles are taken. However, when using a compressible fluid, especially compressed air, the flow velocity at the main nozzle is faster than the speed of sound.
However, if the main nozzle 7 is composed of at least two nozzles with different cross-sectional areas arranged coaxially in series, and the at least two nozzles with different cross-sectional areas are This is achieved by making the nozzle cross-sectional area of the nozzle on the downstream side of the fluid larger than the nozzle cross-sectional area of the nozzle on the upstream side. That is, more specifically, the main nozzle 7 described above is configured with two stages of nozzles having different diameters, and the cross-sectional area of the downstream (second stage) nozzle is larger than that of the upstream (first stage) nozzle. ) is preferable to have a larger cross-sectional area. FIG. 4 is a sectional view showing the structure of a device equipped with a second stage nozzle. As shown in FIG. 4, the main nozzle for supplying the main jet flow M to the yarn processing area 5 is
a circular first-stage nozzle 13 arranged coaxially;
2 having a diameter larger than this first stage nozzle 13
It is composed of stage nozzles 14. The jet flow that has entered the second-stage nozzle 14 is rectified within the second-stage nozzle, and is ejected into the yarn processing area 5 from the second-stage nozzle outlet. At this time, the jet flow ejected from the outlet of the second stage nozzle 14 becomes an ideal parallel flow, and provides a temporally and spatially stable jet flow to the running yarn passing through the yarn processing area 5. It turns out. Furthermore, since the cross-sectional area of the second-stage nozzle 14 that opens into the yarn processing area 5 is larger than that of the first-stage nozzle 13, there are more opportunities for the jet to collide with the running yarn passing through the yarn processing area 5. As a result, jet energy can be efficiently applied to the yarn. By coaxially arranging the main nozzle 7 with the first stage nozzle 13 and the second stage nozzle 14, and by setting the resonance chamber 11 facing the main nozzle 7, fluid vibration is excited. For the continuous main jet M,
By colliding with the auxiliary jet N, which is an intermittent pressure wave, intermittent relaxation is given to the main jet M, so that the running yarn can be reliably moved in the direction across the main jet M. In FIG. 4, immediately after the first stage nozzle 13,
That is, the above-mentioned side hole 12 is provided in the second stage nozzle 14. In this case, by utilizing the negative pressure generated immediately after the first stage nozzle 13, the side hole 13 is actively
Its main feature is that it can absorb more fluid. In addition, the negative pressure generated immediately after the first stage nozzle 13 is
This can be controlled by adjusting the amount of fluid flowing in from the side hole 12. Specifically, this is possible by providing a valve (not shown) in the middle of the side hole 12 that can adjust the cross-sectional area of the side hole 12. Further, a commercially available flow rate regulating valve (not shown) may be connected to the tip of the side hole 12. In addition, in order to easily control the atmospheric pressure immediately after the first stage nozzle 13, an expansion chamber 15 is provided between the first stage nozzle 13 and the second stage nozzle 14 as in the embodiment shown in FIG. It is desirable to have a configuration in which the FIG. 6 is a sectional view showing the structure of the device according to the invention shown in FIG. 5 in more detail. In FIG. 6, inside the housing 6, a yarn processing area 5 is placed in the center, and a main nozzle 7 is configured on one side, which consists of a first stage nozzle 13 and a second stage nozzle 14. ing. The respective nozzles 13 and 14 are processed into nozzle pieces 16 and 17, respectively, and have a structure that can be attached to and detached from the housing 6. Further, an expansion chamber 15 having a diameter larger than that of the first stage nozzle 12 is provided between the two nozzle pieces 16 and 17. This expansion chamber 15 has a side hole 12 communicating with the outside. A throttle valve is provided at the entrance of the side hole 12 if necessary. The yarn processing area 5 is formed by a piece 18 that is detachable from the housing 6, and a resonance tube 19 is provided adjacent to the piece 18. The resonance tube 19 consists of a resonance chamber 11 and a sub-nozzle 8 having a smaller diameter than the resonance chamber 11, and a piston 20 is fitted into the resonance chamber 11. The piston 20 can reciprocate within the resonance chamber 11, and by appropriately determining its position, the volume of the resonance chamber 11 can be determined. The sub nozzle 8 is bored in the piece 18. The axes of the first nozzle 13 and the second nozzle 14 of the main nozzle 7, the sub nozzle 8 of the resonance tube 19, and the resonance chamber 11 are on the same line and are arranged concentrically. The thread processing area 5 is provided with a thread threading slit 21 that communicates with the outside, so that the thread processing area 5 can be easily threaded. In the device of the present invention, in addition to the continuous main jet, there is also a sub-jet having oscillatory pressure waves due to the fluid oscillation effect described above, and the latter sub-jet having pressure waves collides with the former main jet. Become. The running yarn is exposed to this colliding flow, thereby imparting a high speed collection property to the yarn. The oscillation frequency of the fluid is determined by the jet supply pressure, the back pressure immediately after the first stage nozzle 13, the length of the sub nozzle 8, the diameter of the sub nozzle, and the volume of the resonance chamber 11. Since the piston 20 plays the role of freely adjusting the molten volume of the resonance chamber 11, the above-mentioned oscillation frequency of the fluid can be obtained arbitrarily. In the present invention, as described above, the oscillation frequency of the intermittent jet, that is, the sub-jet, is substantially an integral multiple or an integer of the natural frequency of the string vibration exhibited by the running yarn being processed. It is effective if it is set to 1. Furthermore, it is desirable that the resonance sharpness Q indicating the sharpness of fluid oscillation is set to Q2. Here, the resonance sharpness Q is defined as f _p (Hz), which is the frequency of the peak value in the power spectrum of fluid oscillation shown in Fig. 7, and f ₁ and f ₂ (Hz), respectively, which are frequencies 3 dB lower than the peak value. Then, it is defined by the following formula. Q=f _p /|f ₁ −f ₂ | Further, in the present invention, the fluid pressure of fluid oscillation is measured by the method described below. That is, as shown in FIG.
The yarn speed is set by the first feed roller 23,
It passes through the fluid treatment device 3 provided between the yarn guides 2 and further passes through the second feed roller 24 to the winder 2.
5. The device 3 is set midway between the two thread guides 2, 2, with a distance l between the thread guides 2, 2. Furthermore, in order to measure the frequency of the oscillating flow of the fluid processing device 3, a pressure transducer 26 is set on the downstream side of the fluid processing device 3, and the signal output from the pressure transducer 26 is subjected to frequency analysis by a real-time frequency analyzer 27. be done. That is, a semiconductor pressure transducer 26 is used as the pressure sensing element, and a virtual thread path (a straight line connecting the thread guides 2, 2) of the thread running on a diaphragm serving as a pressure receiving part of the pressure transducer 26 and a line between the diaphragm and It is aligned with the axis and is installed facing the fluid discharged from the end of the thread processing area 5 of the fluid processing device 3, and the pressure of the fluid is measured. The semiconductor pressure transducer 26 is connected to a real-time frequency analyzer 27 through an amplifier 40.
to collect the power spectrum of fluid pressure. On the other hand, in order to measure the frequency spectrum of the string vibration exhibited by the running yarn, the running yarn is brought into contact with the diaphragm surface of the semiconductor pressure transducer 28, and changes in the tension of the running yarn are captured by the pressure transducer 28. The signal output from 28 is implemented by connecting through an amplifier 40 to a real-time frequency analyzer. Regarding the crimped yarn that has been subjected to the false twisting process, the natural frequency exhibited by the above-mentioned running yarn is particularly long compared to the length of the spread part where the distance l between the guides is the target. In some cases, it is not fixed. This is because since the yarn is crimped, the degree of freedom of the yarn is large and it is difficult to exhibit exact string vibration behavior. In this case, if the target length of the spread part (≒ pitch of entanglement) is m, the distance l between the guides is:
It is best to set it between 0.5ml and 1.5m, and the sharpness of the resonance is better to be dull. In the case of a yarn that has never been crimped, the above-mentioned natural frequency exhibited by the traveling yarn is not always constant, and may be affected by variations in the denier of the traveling yarn, the degree of convergence of the supplied yarn, the degree of entanglement treatment, and especially fluctuations in treatment tension. Although it varies depending on the factors, if the fluid oscillator frequency is set to this natural frequency (a frequency that is an integer multiple or an integer fraction thereof), the running yarn can be made to vibrate stably. . Regarding the fluid oscillation at this time, the frequency of the fluid oscillation does not include a sharp single fundamental oscillation frequency and a frequency n times that frequency, but rather contains an energy spectrum of each frequency, such as the energy spectrum of white noise. The sharpness of the resonance need not be taken into consideration too much. Of course, if processing conditions such as yarn type, yarn speed, distance between guides, yarn tension during treatment, etc. differ, an optimal natural frequency and resonance sharpness will exist each time. As already mentioned, in the present invention, the main jet, which is a continuous flow, and the sub-jet, which has intermittent pressure waves due to the operation of the resonance tube, collide and merge in the yarn processing area, and the running yarn in the yarn processing area is The opening through which the yarn enters and exits (the upstream and downstream ends of the running yarn in the yarn processing area)
It flows out in more intermittent jets,
The resonance sharpness (Quality factor) of the intermittent jet at a predetermined position near the opening where the traveling yarn enters and exits in this yarn processing area (in the present invention, the downstream position 15 mm away from the end of the processing section on the virtual yarn path). Measure. The sharpness of the resonance in this case is mainly determined by the sharpness of the resonance in the Helmholtz resonator, and the sharpness of the resonance is controlled by the atmospheric pressure at the inlet of the sub-nozzle on the yarn processing region side. As a governing factor, (A) In the fluid treatment device shown in Fig. 3, the side hole 1
If 2 is not available, the design conditions such as nozzle dimensions (nozzle hole diameter, distance between the nozzle outlet and resonance tube inlet, cross-sectional dimensions of the yarn processing area, length of the yarn processing area, etc.), and the supply pressure that is the usage condition. Therefore, the resonance sharpness (Q value) is uniquely determined. Notably, the pressure at which resonance occurs is also uniquely determined. In other words, it is quite difficult to obtain the desired resonance state with the desired supply pressure. (B) In the equipment shown in Figures 5 and 6, (a) nozzle dimension, which is a design condition, (b) supply pressure, which is a usage condition, and (c) the inside of the expansion chamber 15, which can be adjusted during use. The atmospheric pressure (degree of vacuum) is Regarding (c), by adjusting the atmospheric pressure inside the expansion chamber 15, the degree of spread of the jet jet ejected from the main nozzle can be controlled.
As a result, the atmospheric pressure at the inlet of the resonance tube 19 can be determined. As a specific method for setting the condition (c), the side hole 12
This is possible by controlling the amount of fluid (air in this case) sucked in. As a specific means, a flow control valve may be connected to the side hole 12, or the housing 6 may be installed so as to pass through the cross section of the side hole 12 so that the cross section of the side hole 12 can be made variable.
It may be partially closed by using screws (bolts) provided in the. The resonance sharpness is determined by the atmospheric pressure at the entrance of the resonance tube, and the factors are as described above, but when actually processing yarn, the resonance frequency is also important, and it is necessary to adjust the resonance sharpness to the desired frequency. It is necessary to adjust the volume of the resonance chamber. In this case, when the frequency changes, the resonance sharpness may also change as a side effect. In such a case, by adjusting both the amount of fluid flowing in from the side hole 12 and the volume of the resonance chamber, the desired resonance frequency and resonance sharpness can be achieved at the desired supply pressure (use conditions). It is possible to obtain degrees. In the present invention, a liquid O such as water may be introduced from the side hole 12 and supplied to the yarn processing area 5 together with the main jet stream M. The liquid O acts on the traveling multifilament yarn in the form of mist together with the main jet flow M, and can further enhance the focusing effect of the traveling yarn. Furthermore, due to the action of the resonance tube 19, fluid vibrations at relatively low frequencies in the audible frequency range and, inevitably, ultrasonic waves are generated. The liquid O jetted into the yarn processing area 5 together with the main jet stream M through the side hole 12 becomes fine particles on the micron scale due to the ultrasonic waves, and when the main jet stream M is compressed air, the momentum of the jet stream should be particularly increased. This makes it possible to effectively apply jet energy to the running yarn. Also,
The liquid O atomized into micron-sized particles efficiently adheres to the running yarn, and especially when the atomized liquid contains water, it has the effect of increasing the friction between the single yarns that make up the running yarn. As a result, the convergence of the yarn can be improved. Examples of the present invention will be described below. In addition, the degree of entanglement CF- used as a characteristic value for evaluating the characteristics of the treated yarn in the following explanation is the degree of entanglement measured by the method described later,
CF- is an entanglement tester (En
This is the degree of entanglement measured with a tangle tester type 2040 (for nylon 70D, measurement conditions: running thread tension 14 g, trip level 20 g). In the examples, experiments were conducted in an atmosphere of the same temperature and humidity, and with the same compressed air flow, in order to have the same execution environment, and the degree of entanglement was also measured in the same atmosphere of temperature and humidity, and with the same raw yarn for each experiment. Measured in lots. Example 1 In this example, two-stage nozzles 13, 14,
A device equipped with an expansion chamber 15, a side hole 12, and a fluid oscillator (FIG. 6) consisting of a Helmholtz type resonator was used, and the device shown in FIG. 2C was used as a comparative example. In both the devices shown in FIG. 6 and FIG.
It is 2.5mm. The main nozzle 7 has a diameter of 0.8 mm in both devices and is located at the center of the long side. In this series of experiments, a nylon yarn that had never been crimped was used, but in the case of a yarn that had never been crimped, the frequency of the secondary jet was determined by the natural vibration of the string vibration of the running yarn during processing. substantially an integer multiple of the number,
As mentioned above, it is more effective to set the number to 1 or an integer fraction thereof. For example, nylon
70D, the distance between the guides shown in Fig. 1A, Fig. 2, and Fig. 8 is 15 cm, and the thread tension T is 5 g, then the first-order natural frequency f is: is given by Calculating f from this formula yields 265Hz
becomes. (However, ρ is the linear density g/cm, and in the case of nylon, the density was determined at d=1.14 g/cm) This vibration is in a relatively low frequency region. In actual experiments, the fluid oscillation frequency is selected based on an integral multiple of the first-order natural frequency determined by this calculation.
The natural frequency of the string vibration exhibited by the actual running thread is the 8th
Measure as shown in the figure. As a result of selecting the experimental conditions as shown in Table 1, the results shown in Table 2 were obtained. Note that the theoretical first-order natural frequency f _p of string vibration of the nylon thread in this case is 265 Hz.

【table】

[Table] As is clear from Table 2, the two-stage nozzle according to the present invention, the expansion chamber, and the side hole ,
When using an apparatus equipped with a resonance chamber (Fig. 6) (Experiments No. 3-1 and 3-2), a considerable degree of confounding CF-
An increase in In particular, at an oscillation frequency close to an integer multiple of the natural frequency of string vibration, the degree of entanglement CF−
The improvement is remarkable. Example 2 In Experiment No. 3-2 of Example 1, water was sucked through the side hole 12 with the other conditions being exactly the same. As a result, the degree of confounding CF- increased from 35 to 93, an increase of nearly three times. Example 3 Using the same apparatus as in Example 1, a crimped yarn of polyethylene terephthalate 150D-48F was used as the yarn to be treated. When the experiment was carried out under the conditions shown in Table 3, the results shown in Table 4 were obtained.

【table】

[Table] Example 4 In Example 3, the device shown in Fig. 12 was used, the distance between the guides was 1.6 cm, the running yarn tension was 4 g,
The target pitch of confounding was set equal to m = 1.6 cm. Table 5 shows the experimental results.

[Table] The method described below was used to measure the degree of entanglement CF- of the threads. That is, a needle-like object is inserted between the fibers constituting the multifilament yarn at a substantially right angle to the yarn axis direction, the needle-like object is fixed, and the tension difference between the threads on both sides of the needle-like object is kept constant. By applying a load, the yarn was moved in the yarn axis direction, the amount of movement m (cm) was measured, and the value of m was used to define the degree of entanglement = 100/m. FIG. 9 is a diagram schematically showing an apparatus for measuring the degree of entanglement CF-. The measurement procedure is as follows: (1) Multifilament yarn 1 is hung on movable pulley 29. (2) A fixed needle 30 is inserted between the fibers constituting the multifilament yarn 1 substantially at right angles to the yarn axis direction. (3) Fix the fixed needle 30 in the state of (2) to the wall. (4) Load 3 on both ends of multifilament yarn 1
Attach 1 and 32. (5) Attach the auxiliary load 33 to either side of the load 31 or the load 32. (6) Due to the auxiliary load 33, the yarn 1 is fixed to the fixed needle 30.
The pointer 34 is fixed to the pulley 29 after the movable pulley 29 has stopped rotating.
The position is read on a scale on a scale plate 35 fixed to the wall. (7) Next, change the auxiliary load 33 to one of the loads. (8) Similar to (6), after the movement and rotation have stopped, pointer 3
Read the position 4 on the scale on the scale plate 35. The scale read in (6) and the total distance traveled by the thread from this scale (m)
(cm) and complete the measurement. Here, the loads 31, 32 and the auxiliary load 33 are determined as follows. In the case of 70 denier, 24 filament nylon with no crimp, that is, loads 31 and 32 are denier x 0.2g = 70 x
0.2=14g, and the auxiliary load 33 is denier number/filament number=70/24=2.9g. For crimped polyethylene terephthalate 150 denier, 48 filament, load 3
1,32 is the denier number x 0.4g = 150 x 0.4 = 60
g, and the auxiliary load 33 is (denier number/filament number) x 2 g = (150/48) x 2 g = 6.3. A known example of applying a resonance tube to a yarn fluid treatment device is US Pat. No. 3,167,847. The specification of US Pat. No. 3,167,847 is composed of a Helmholtz type resonator 39 consisting of a nozzle 37 and a resonance chamber 38, which are provided coaxially opposite a first-stage nozzle 36, as shown in FIG. As shown in the embodiments of the present invention, there is no yarn processing area surrounded by a wall around the running yarn. In an embodiment of the present invention, a sub-jet with oscillatory pressure waves generated by a resonance tube collides with a main jet, which is a continuous flow, ejected from a nozzle within a limited yarn processing area, and Yarn treatment jet and no,
The inner wall of the yarn processing area is actively used to allow the yarn to easily cross the main jet, and as stated in the specification, the oscillation frequency is around 1000Hz or
It is a low frequency of 2000Hz or less. Naturally, in the device of the present invention,
The yarn is always in contact with the inner wall forming the yarn treatment area. However, the device shown in U.S. Pat. No. 3,167,847 has a nozzle 37 connected to the tip of the first-stage nozzle 36 and the resonance tube inlet, that is, the resonance chamber 38.
There is nothing between the tips of the yarn to restrain the movement of the yarn during yarn processing. Furthermore, as the yarn speed becomes higher, in order to obtain the same entangled pitches as at low speeds, it is necessary to cause the main jet to cross the running yarn more aggressively than at low speeds. If there is nothing to restrain the movement of the yarn between the tip of the first stage nozzle 36 and the tip of the nozzle 37 connected to the resonance chamber 38, the restoring force due to the force of the jet cannot be expected much, and the resonance chamber is provided. Even in a yarn fluid treatment device equipped with a nozzle, it is difficult for the yarn to cross the main jet stream efficiently. As a result of using the apparatus and conditions described in U.S. Pat. No. 3,167,847 and conducting various experiments of the present invention, the present inventor has found that, especially when yarn processing is performed at high speed, the yarn being processed is It has been found that it is absolutely necessary to have a yarn treatment area that comes into contact with the yarn in order for the energy of the jet stream to be used efficiently for yarn treatment. Further, US Pat. No. 3,167,847 focuses on the resonance sound generated by the resonance tube, and states that the effect of confounding is maximized when the resonance sound is at its maximum. The secondary jet, which is a relatively low-frequency oscillating flow, collides with the continuous main jet in the yarn processing area surrounded by the inner wall, and furthermore, by colliding with the inner wall, the collision flow collides with the continuous main jet. By actively crossing the main jet, the yarns are intertwined. Also, according to US Pat. No. 3,167,847,
In order to reduce the level of resonance, it has been described that the area around the nozzle is surrounded by a sound absorbing material, but this sound absorbing material cannot serve as an inner wall that restricts the movement of the thread. This is because when the thread comes into contact with the sound-absorbing material, thread breakage and fuzz occur, and the thread processing device itself becomes meaningless. Below, Tables 6 and 7 summarize the results of comparative tests with the examples of the present invention using the examples described in US Pat. No. 3,167,847 as comparative examples. The degree of entanglement in this test was measured using an entanglement tester manufactured by Rothshield. The degree of confounding measured by this measuring device is organized as degree of confounding CF-. Note that the threads used in this example were nylon 6,
It is 70D−24f. Experiment Nos. 9, 10, and 11 are supplementary tests of the specification of U.S. Patent No. 3,167,847, and Experiments No. 1-2, 11-3
Regarding this, we also conducted a test at a yarn speed of 600 m/min. US Patent No.

【table】

【table】

[Table] In the case of specification No. 3167847, when the yarn speed is set to 600 m/min, the degree of entanglement is extremely reduced. Thread tension 3~19g
The degree of confounding is low even if changed to In the tests of these US Pat.
13 is 18N/min, experiment No. 14 is 28N/min,
Both are 1/3 of the compressed air consumption in the above US patent.
Even when performed at ~1/2, the degree of confounding CF− is large. I tried to calculate the entanglement power per unit flow rate by dividing the degree of entanglement by the compressed air consumption. As stated in the above US patent, this value in the formula corresponds to the yarn speed of 200
m/min and processing tension of 6 g, it is 0.47 to 0.79, whereas in the present invention it is 1.1 to 1.8, and it is clear that the apparatus of the present invention is superior. In the example of the present invention, the degree of entanglement did not decrease even if the yarn speed was increased (evaluated using a tension of 6 g as a standard).
As explained above, the apparatus of the present invention makes it possible to provide entanglement to yarns efficiently and with low energy.

[Brief explanation of the drawing]

FIGS. 1A, B, and C are model diagrams showing the behavior of yarn due to jet flow. FIGS. 2A, B, and C are sectional views showing the main parts of the conventional device. Figure 3, Figure 4,
FIG. 5 is a sectional view showing the main parts of the device according to the present invention. FIG. 6 is a sectional view illustrating the structure of the device shown in FIG. 5 in more detail. FIG. 7 shows the power spectrum of the fluid oscillator. 8th
The figure is a schematic diagram for explaining the structure of an apparatus used in an example of the present invention. FIG. 9 is a schematic diagram showing a procedure for measuring the degree of entanglement CF-. 1st
Figure 0 is a cross-sectional view of the device shown in US Pat. No. 3,167,847. Explanation of symbols in the drawings: 3: yarn fluid treatment device, 5: yarn treatment area, 7: main nozzle, 8: sub nozzle, 11: resonance chamber, 12: side hole.

Claims (1)

[Scope of Claims] 1. (a) A yarn treatment area through which the yarn to be treated can pass in a continuous running state; (b) One end connected to a fluid supply source and the other end opened to the yarn treatment area. , a main jet supply nozzle that supplies a continuous fluid jet; (c) an opening in the middle of the main jet supply nozzle;
(d) a side hole having a fluid passage for adjusting the fluid flow of the main jet supply nozzle; (e) a resonance tube disposed at a position facing the main jet flow supply nozzle across a region; and (e) the yarn provided so as to come into contact with the yarn running in the yarn processing region together with the fluid during yarn treatment. A fluid entanglement processing device for yarn, comprising: a wall substantially surrounding a processing area;