JPH06116806A - Melt-spinning device - Google Patents

Abstract

PURPOSE:To provide the melt-spinning device equipped with an oiling device capable of efficiently shutting an accompanied air flow generated around a melt-spun fiber and of uniformly and efficiently imparting an oil to the fiber, when the oil is imparted to the fiber traveling at a high speed. CONSTITUTION:The melt-spinning device for melt-spinning a thermoplastic polymer, imparting an oil to the spun, cooled and solidified fiber and subsequently winding up the fiber through a pair of take-up rollers is characterized in that an oiling device has a fiber guide in which a specific volume of an oil can be imparted to the fiber, and that at least one baffle is disposed just above the oiling device, the baffle being a fiber-passing hole for preventing an air flow accompanied with the fiber from blowing into the fiber guide of the oiling device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved apparatus for producing a thermoplastic polymer, and more specifically, in a melt spinning process of a thermoplastic polymer such as polyester, it is possible to uniformly feed a yarn running at high speed. The present invention relates to a melt spinning device.

[0002]

2. Description of the Related Art In the production of synthetic fibers by a melt-spinning method using a thermoplastic polymer, a guide oiling method having an excellent quantitative property developed for the purpose of uniformly applying an oil agent is widely adopted. In this guide oiling method,
An oil agent applying device is used that has a yarn guide portion and is configured to supply a predetermined amount of oil to the guide portion. At the same time that this type of oil agent applying device is used,
In order to reduce the spinning tension in recent years, in order to reduce the spinning tension, the melt-spun multi-filament fibers are cooled and solidified, and then an oil agent is quickly added to bundle the fiber bundles. It is a general technique to prevent the airflow from entering the inside and to suppress the influence of the airflow during traveling of the yarn as much as possible to suppress an increase in yarn tension when the yarn travels at high speed.

[0003]

However, when the spinning speed exceeds 4000 m / min, or when the number of fiber yarns exceeds 70, the yarns run at high speed. The associated airflow generated around the air blows into the yarn guide portion of the oil agent applying device, blows off the oil agent, or prevents the adhered oil agent from penetrating between the constituent fibers,
Uniform lubrication becomes difficult, and fluff occurs in the drawing process.
There is a problem that the occurrence of yarn breakage increases.

According to the present invention, when the oil agent is applied to the melt spun yarn running at a high speed as described above, the associated air flow generated around the yarn is efficiently blocked, and the yarn is uniformly and uniformly applied to the yarn. An object of the present invention is to provide a melt spinning apparatus provided with an oil agent applying device that can efficiently apply an oil agent.

[0005]

The present invention solves the above problems, and is particularly suitable for a high-speed melt spinning apparatus for winding at a spinning speed of 4000 m / min or more, and to a spun yarn for high-speed winding. This allows for uniform lubrication.

That is, the present invention relates to a melt spinning apparatus in which a thermoplastic polymer is melt-spun, and an oil agent is applied to a cooled and solidified yarn, which is then wound through a pair of take-up rollers. The yarn guide has a guide part, and the yarn can be supplied with a fixed amount of oil inside the yarn guide part. The air flow accompanying the yarn is directly above the oil agent applying device, and the yarn guide of the oil agent applying device is provided. It is characterized in that a baffle is installed to prevent blowing into the part. Hereinafter, the present invention will be described in more detail.

The thermoplastic polymer as used in the present invention can be applied to any polymer capable of melt spinning, such as polyester, polyamide, and polyolefin. It is particularly effective in melt spinning of polyester capable of increasing the number of fibers constituting the.

The melt spinning apparatus in the present invention is an apparatus in which an oil agent applying device is installed between the spinneret and the first take-up roller, and the melt spun yarn is placed between the spinneret and the first take-up roller. After cooling and solidifying by the cooling device installed in
The spinning device for subsequently applying the oil agent may be a so-called direct spinning and drawing device in which a heating and drawing area is provided between the cooling device and the oil agent applying device. Furthermore, the temperature of the first take-up roller and the subsequent rollers, the presence / absence of the stretching process, etc. are not particularly limited.

In the above direct spinning / drawing apparatus having a heating / drawing zone provided between the cooling device and the oil agent applying apparatus, the oil agent applying apparatus is installed below the heating / drawing area, and the oil agent applying apparatus and the heating area are provided. When they are relatively close to each other, the associated air flow generated around the yarn and brought into the oil agent applying device has a high temperature depending on the temperature of the heating region. This high-temperature air flow not only causes the problem of the scattering of the oil agent, but also causes an increase in the surface temperature of the oil agent applying device, which causes a problem such as a change in the viscosity of the oil agent and a gelation of the oil agent. Therefore, the application of the present invention to a so-called direct spinning and drawing apparatus in which a heating and drawing area is provided between the cooling device and the oil agent applying device is more effective.

It is desirable that the baffle installed directly above the oil agent applying device satisfies the following conditions. (1) Install two or more baffles. (2) Regarding the angle θ between the baffle plate and the traveling yarn, θu <θb 30 ° ≦ θu ≦ 60 ° 45 ° ≦ θb
The condition of ≦ 80 ° is satisfied. Here, θu represents the angle between the upper baffle plate and the yarn, and θb represents the angle between the lowermost baffle plate and the yarn. (3) As for the thread passage holes drilled in the baffle plate, it is desirable that the shape be elliptical because the baffle plate is inclined at the angle θ with respect to the yarn as described above. It is connected to the slit. The interval between the slits is preferably as narrow as possible so as not to hinder the introduction of the yarn. The major axis D _L and the minor axis D _S of the elliptical hole are assumed to be perfect circles in the cross section of the fiber bundle passing therethrough, and the major axis D _L and the minor axis D _S are 1. 5 × d / sin θ ≦ D _L ≦ 3.0 × d / sin θ 1.5 × d ≦ D _S ≦ 3.0 × d. However, a perfect circle of 1.5 × d / sin θ ≦ 3.0 × d / sin θ may be used in view of accuracy and easiness of perforation.

Here, the larger the number of baffle plates, the greater the effect, but from the viewpoint of operability, the number of baffle plates is preferably 2 to 3. Regarding the inclination angle of the baffle plate, in the upper baffle plate where there is a lot of air flow associated with the yarn to be blocked, the traveling yarn flow is disturbed due to the reflection of the associated air flow to be blocked, causing yarn unevenness and perforating the baffle plate Since a problem such as contact between the yarn passing hole and the yarn is generated, the blocked entrained air flow does not reflect on the plate surface and flows along the yarn traveling direction so that the baffle plate and the yarn The crossing angle is preferably small. On the other hand, regarding the lowermost baffle, most of the associated airflow is already blocked by the upper baffle, so the reflected airflow is less affected as described above, and the associated airflow is blocked more effectively. As possible, it is preferable that the angle of intersection between the baffle plate and the thread be relatively large. The size of the yarn passage hole formed in the baffle plate is preferably as small as possible within the range in which the traveling yarn does not come into contact. When the traveling yarn comes into contact with the yarn passage hole, there is concern that the yarn breakage may occur or the dyeing quality may be affected.

[0012]

EXAMPLES Examples of the melt spinning apparatus according to the present invention will be described below in detail with reference to the drawings. Figure 1 (a),
(b) is a schematic diagram showing an example of a melt spinning apparatus and a direct spinning and drawing apparatus, respectively, capable of uniformly feeding the yarn of the present invention,
FIG. 2 is an enlarged explanatory view of an oil agent application portion in FIG. 1, FIG.
(a), (b) is shape explanatory drawing which shows various examples of a baffle plate. The spun yarn 2 melted and discharged from the spinneret 1 is a cooling device 3
After being cooled and solidified by the cold air blown out, the yarn 2
Up and down 2 installed at a certain angle to
The sheet is guided to the guide oil supply section 7 of the oil agent applying device (not shown) without passing through the baffle plates 5 through the yarn passage holes 6 formed in the baffle plate 5.

In the direct spinning / drawing apparatus as shown in FIG. 1 (b), the cooled and solidified fiber yarn 2 is guided to the heating cylinder 4, and is heated and drawn inside the heating cylinder 4 and then the baffle plate 5 is drawn.
Through the guide oil supply section 7.

Here, the shape of the guide oil supply section 7 is not particularly limited, but in this embodiment, as shown in FIG. 4 (a), the guide oil supply section 7 has a yarn guide section 7a at the tip thereof and the guide section 7a has a thread guide section 7a. It has a rod shape having an oil supply passage 7b communicating at a right angle,
Alternatively, as shown in FIG. 3B, the bases of two trapezoidal plate members are connected to each other to form a yarn guide portion 7a 'at the connecting portion, and an oil supply passage 7b opened to 7a' at the guide portion. ′
A structure having a structure is formed. The fiber yarn 2 to which the oil agent has been applied by the guide oil supply section 7 is focused by the focusing guide 8 installed below the guide oil supply section 7 and guided to the first take-up roller 10. Immediately below the guide oil supply unit 7, a light air entanglement treatment may be performed by the air entanglement treatment device 9 in order to promote oil permeability between the constituent filaments.

The baffle plate 5 installed directly above the guide oil supply section 7 satisfies the following conditions as described above. (1) Install two or more baffles. (2) Regarding the angle θ between the baffle plate and the traveling yarn, θu <θb 30 ° ≦ θu ≦ 60 ° 45 ° ≦ θb
≦ 80 °, (3) For the thread passage hole 6 drilled in the baffle plate, it should be a perfect circle of 1.5 × d / sin θ ≦ 3.0 × d / sin θ because of the accuracy and ease of drilling. There is. Two baffle plates 5 are used at the top and bottom.

According to the apparatus of the present invention, it is possible to efficiently block the associated air flow generated around the fiber yarn running at high speed, and to uniformly apply the oil agent. Further, even when the associated air flow is at a high temperature, alteration and deterioration of the oil agent due to the high temperature air flow can be prevented. Hereinafter, the present invention will be described more specifically with reference to specific examples and comparative examples.

(Specific Example 1) Polyethylene terephthalate having an intrinsic viscosity of 0.65 was directly spun and drawn by using the direct melt spinning and drawing apparatus shown in FIG. 1 (b). At this time, a spinneret having 72 spin holes each having a diameter of 0.20 mm was used, and spinning was carried out at a discharge amount such that the fineness of the resulting drawn yarn was 100 denier, and the spinning temperature was 285 ° C. For the cooling of the spun yarn, a side-blow type cooling device is used. After cooling the yarn temperature to 80 ° C or lower, the yarn is introduced into a heating cylinder installed between the cooling device and the take-up roller, and inside the heating cylinder. It was stretched.

The heating cylinder is a cylinder having an inner diameter of 28 mm and a length of 2.5 m, the guide diameter of the outlet opening is 10 mm, and the internal temperature is set to 210 ° C. The yarn drawn in the heating cylinder passes through the two baffles shown in Fig. 3 (a) installed just below the heating cylinder and is guided to the guide oil supply section, and the target oil content is calculated as 1.10%. The oil was supplied at such an oil supply amount as described above, and then wound up at 5000 m / min via a pair of take-up rollers. The distance between the heating cylinder outlet guide and the upper baffle plate is 50 mm, and the distance between the upper baffle plate and the lower baffle plate is 30 m.
m, the distance between the lower baffle and the oiling guide is 3 mm,
Angle θu between upper baffle plate and lower baffle plate and running yarn,
θb was set to 45 ° and 60 °, respectively. The size of the yarn passage holes formed in the upper baffle plate and the lower baffle plate was 8 mm and 5 mm, respectively, and the distance between the yarn introducing slits was 2 mm.

Between the heating cylinder outlet guide and the upper baffle plate (A), between the upper baffle plate and the lower baffle plate (B), the wind speed, wind temperature and guide of each accompanying flow around the traveling yarn of the guide oil supply section (C). The surface temperature of the oil supply section and the oil content adhering to the obtained drawn yarn were measured, and the results are shown in Table 1.

(Example 2) The same as Example 1 above except that the baffle plate has the same spacing as the thread introducing holes as shown in 5'of FIG. 3 (b). Direct spinning was performed under the same conditions as in Example 1 using the equipment described in 1. Then, similarly to the specific example, the wind speed, the air temperature of the accompanying flow of each part, the surface temperature of the guide oil supply part, and the oil content adhering to the drawn yarn were measured, and the results are shown in Table 1.

(Comparative Example 2) The same equipment as in the specific example was used except that the baffle plate was removed, and direct spinning and drawing were carried out under the same conditions as in the specific example. Then, similarly to the specific example, the wind speed, the air temperature of the accompanying flow of each part, the surface temperature of the guide oil supply part, and the oil content adhering to the drawn yarn were measured, and the results are shown in Table 1.

As is clear from Table 1, in the specific examples of the present invention, the baffle plate efficiently interrupts the high temperature associated air flow, and the wind speed and temperature of the associated flow near the guide oiling section decrease. It can be seen that the surface temperature of the guide oil supply section is also low, the effective utilization rate of the supplied oil agent is high due to the oil adhered to the drawn yarn, and the scattering of the oil agent due to the accompanying air flow is reduced.

[0023]

[Table 1]

[0024]

As described above, according to the present invention, 4000 m
When applying an oil agent to the melt spun yarn running at a high speed of at least 1 minute, the air flow generated around the yarn is efficiently blocked, and the oil agent is evenly and efficiently applied to the yarn. The stability of the spinning process can be ensured, and the quality of the obtained synthetic fiber yarn can be made uniform.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a melt spinning apparatus and a direct melt spinning drawing apparatus capable of uniformly supplying oil to a yarn of the present invention.

FIG. 2 is an enlarged explanatory view of a guide oil supply portion in FIG.

3A and 3B are schematic views of the shape of a baffle plate, wherein FIG. 3A shows the baffle plate used in Example 1 of the present invention, and FIG. 3B shows the baffle plate used in Example 2.

FIG. 4 is an example of a guide oil supply section used in the present invention.

[Explanation of symbols]

 1 Spinneret 2 Spinning yarn group 3 Cooling device 4 Heating cylinder 5,5 'Baffle plate 6,6' Yarn passage hole 7 Guide lubrication part 7a, 7a 'Yarn guide part 7b, 7b' Lubrication passage 8 Focusing guide 9 Air Entanglement Processing Device 10 First Take-up Roller 11 Second Take-up Roller 12 Winder

Claims (1)

[Claims] 1. A melt-spinning apparatus in which a thermoplastic polymer is melt-spun, an oil agent is applied to a cooled and solidified thread, and the thread is subsequently wound up through a pair of take-up rollers. It is possible to supply a fixed amount of oil to the yarn inside the yarn guide portion, and the air flow accompanying the yarn is blown into the yarn guide portion of the oil agent applying device just above the oil agent applying device. A melt spinning apparatus characterized in that a baffle plate for preventing such a situation is installed.