JPS6337080A - Take-up method for polyester filament - Google Patents

Abstract

PURPOSE:To enable to manufacture filament capable of getting high quality knit by making the interval between a self driving type contact roll and a bobbin 50mum through 400mum so as to roll when starting to take-up. CONSTITUTION:A bobbin axis 5 is connected to a bobbin axis driving device 6 and driven through frequency control by a inverter 7 so that the surface speed of a package 2 taken-up round the surface of a bobbin 3 may be constant, for example, 5,500m/min. On the other hand, a contact roll 4 is connected to a driving device 9 through a transmitting device 8 and supplied, by the inverter 10, with frequency and driving force required for rotation in accordance with the surface speed of the package 2. Then, when starting to take-up, the interval between a contact roll 4 and a bobbin 2 is made 50-400mum to be taken-up by a contact roll upward/downward sliding axis 11 having a spacer 12 therein. In this way, high quality polyester filament without joint and constriction can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for winding polyester filaments that can be used directly to produce knitted fabrics of good quality.

[Conventional technology]

In recent years, there has been a strong demand for improved productivity in the production of polyester filaments, and attempts have been made to manufacture polyester filaments using the so-called high-speed spinning method, which uses high take-off speeds of over 5,500 m/min in the spinning process, especially the spinning process. Next time I'm able to do it.

The polyester filaments obtained by this high-speed spinning and drawing method have a fine structure of 7.5 mm, and are manufactured by two processes: a conventional spinning process and a drawing process (for example, JP-A-57
It is significantly different from spun/drawn yarn (as typified by Japanese Patent Publication No. 16913), and therefore, spun/drawn yarn has outstanding useful features regarding the performance required for practical use. It is known from Publication No. 121613/1983.

The most outstanding features in practical use are severe dyeability and low heat shrinkage. Easy dyeing is achieved by general-purpose low speed spinning/
Practical dyeing temperature t1 obtained by drawing and dyeing yarn at high temperature and high pressure
It is excellent to the extent that it can be achieved at 10°C to normal pressure, and the effect is particularly remarkable for filaments obtained by high-speed spinning using a take-up speed of 6000 ffi/min or more, as disclosed in JP-A-57 It is disclosed in Japanese Patent No.-121613.

9.Low heat shrinkage is achieved through the processing steps that the gray fabric must go through after weaving, typically in the process of scouring,
The dimensional change of the fabric during the dyeing process is extremely minimized,
As a result, it is possible to omit the presetting step that is performed prior to these wet processing steps.

However, contrary to the above advantages, when a polyester filament fabric is wound as a cheese-like package using a high-speed spinning take-off method, the thickness of the filaments laminated on the innermost layer of the package and the bag is less than 1 mm. Short white streak-like defects called ``sticks'' occur on the gray fabric, and minute Motosawa spots on the fabric surface called ``sink marks'' occur during the processing process. Fabrics that overcome these defects will have extremely low commercial value, so it is an important issue to overcome these defects.

For high-speed winding of 5500 m7 minutes or more, generally a bobbin shaft drive type winding machine is used which directly drives a bobbin shaft equipped with a contact roll. The winding mechanism of this bobbin shaft-driven winding machine winds the pancage, which is formed by laminating filaments on the bobbin, with good shape stability while suppressing it with contact rolls. At this time, all the power necessary to rotate the contact roll is transmitted through frictional contact between the package and the contact roll. (Such a contact roll driving method is called a "driven method.") Using a winding machine that generates kW of such a driven contact roll,
When the filament is wound up, the filament is stacked on the bobbin to some extent, and the cheese-like package acts as a cushion, so there are no "sticky" or "sink" defects, but the filament is extremely thin on the bobbin. <8! t
In the 1-position state, the filament and the contact roll come into intense instantaneous contact with each other due to the vibration of the winding machine and minute irregularities on the surface of the bobbin, and the filament is subjected to stress such as compression, elongation, and heat generation, which causes the yarn to deteriorate. It has become clear that quality spots occur, resulting in "skin" defects and "sink marks" defects.

Japanese Patent Laid-Open No. 60-2091013 mentions that it is difficult to eliminate yarn unevenness due to the fact that all contact rolls are attached to conventional bobbin shaft drive type winders for producing cheese-like packages. , as an alternative to No. 7, proposes winding the package in a tapered shape without contacting the package during winding.

Therefore, when a cheese-like package is melt-spun and wound at a high speed of 5,500 ml or more, and the filaments are directly applied to a knitted fabric from the package, the part where the thickness of the filaments laminated on the bobbin is 1 nm or less At present, no method has been found for producing polyester filaments that does not cause the "7" defect or the "sink mark" defect.

[Problem that the invention seeks to solve]

The object of the present invention is to use a polyester filament produced by a high-speed spinning and winding method, even if it is directly applied to knitted fabrics.
Thickness of filament stacked on bobbin PI I 11
To provide a method for winding polyester filament, which allows a knitted iF& product of good quality to be obtained that does not produce "stick" defects or "sink" defects in areas within 1.

[Failure to solve the problem]

The present invention is a melt-spun polyester filament) t5
When winding a cheese-like package using a spindle drive type winder at 500ffi/min or more, a winder with a self-driven contact roll is used, and at the start of winding, the gap between the contact roll and the bobbin is 50μm or more 400μm
This is a polyester filament winding method characterized by winding the polyester filament with the following gaps.

In the winding method of the present invention, the gap between the bobbin and the contact roll is set to 5
It is necessary to set the thickness to 0 μm or more and 400 μm or less. By setting the gap between the bobbin and the contact roll to 50 μm or more, the filament wound on the bobbin comes into instant contact with the contact roll. It is possible to prevent this. If the gap between the bobbin and the contact roll is less than 50 μm, the filament wound around the bobbin will come into instant contact with the contact roll due to the vibration of the winding machine or the minute irregularities of the stub, and that part will be fabricated. When this occurs, it becomes a "blind" defect or a "sink mark" defect.

On the other hand, if a gap of more than 400 μm is provided between the bobbin and the contact roll, the filament will be designed to be larger than the next traverse position until the filament is stacked on the bobbin and comes into contact with the contact roll. Trying to go inside. As a result, fluctuations in winding tension occur, resulting in thread unevenness. Also, the speed fluctuations of the contact rolls become thicker and thread unevenness occurs.

If the gap between the bobbin and the contact roll is 400 μm or less, thread unevenness, which is a drawback of mm&s, will not occur.

The winding method of the present invention in which a specific gap is provided between the bobbin and the contact roll is achieved for the first time by a winder having a self-starting contact roll.

The gap 'Jt specified in the present invention by the driven contact roll
! When winding is carried out, power is not transmitted from the bobbin to the contact roll at the start of winding, so the speed fluctuation of the driven contact roll increases significantly, and yarn unevenness becomes noticeable, which is an object of the present invention. is not achieved. In the present invention, if the self-driven contact roll is used, it is not necessary to receive almost all the power necessary for rotating the contact roll from the bobbin shaft, so that it is possible to stably wind a homogeneous filament.

FIG. 1 shows one embodiment showing the configuration of main parts of a winding machine used in the method of the present invention, in which a bobbin shaft 5 is connected to a bobbin shaft drive device 6, and further, a bobbin shaft drive inverter 7 allows It is driven while controlling the frequency t so that the surface peripheral speed of the package 2 wound on the surface of the bobbin 3 inserted on the bobbin shaft 5 is constant.

The contact roll 4 is connected to a contact roll drive 9 via a transmission 8, and a contact roll drive inverter 10 provides the necessary frequency and frequency for rotation of the contact roll 4, which corresponds to the surface speed of the package 20. The driving force is supplied above.

The drive inverter of the bobbin shaft and the drive inverter of the contact roll may be mutually adjustable mechanisms as shown in Japanese Patent Application Laid-Open No. 52-21438, but the "edge" and "sink" defects can be improved. In order to completely eliminate this problem, it is preferable to use a mechanism in which the speed of the contact rolls is controlled with high accuracy, and both drive inverters are controlled independently from each other.

In this case, as a control method to gradually reduce the bobbin shaft rotation speed as the winding diameter of the package increases, there is a method in which the speed of gradual decrease is memorized in the cong kneader, and a method in which changes in the tension applied to the filament are detected and fed back to the bobbin shaft. A tension control method is adopted, in which a change in the circumferential speed of a contact roll or a wound body is detected by a sensor, etc., and controlled by feeding it back to the bobbin shaft.

The contact roll pivot device 9 used in the winder of the method of the invention preferably uses a high speed three-phase induction motor. The connection method of this motor is not limited to the embodiment, and it may be directly connected to the shaft of the contact roll, or it may be built into the welding roll and implemented as an outer rotor type. Furthermore, it can also be driven by an air turbine without using a motor.

The driving force supplied to drive the contact roll is determined by the peripheral speed of the contact roll measured with the contact roll not in contact with the bobbin shaft during winding, and the desired peripheral speed of the package (
When the winding speed) is the same speed, it is 100%, 95% ~
Even if it is 125%, the purpose of the present invention can be fully achieved.

Normally, 100% is adopted. (Hereinafter, 100% is shown unless specified.) However, the frequency should be set in a range from 0 to 10% higher than the calculated frequency corresponding to the set winding speed.

FIG. 2 is a schematic diagram showing a state in which winding of the filament 1 is started with a gap Cg provided between the bobbin 3 and the contact roll 4.

The bobbin and the contact roll must be in a completely non-contact state. If the bobbin and the contact roll come into contact even partially, it will affect the drive of the winder's thread shaft! Because # is applied, filamentous spots occur. For example, if the contact roll is equipped with an accelerating ring, the filament of the bobbin will
Although contact between the exposed part and the contact roll can be avoided, part of the bobbin comes into contact with the accelerating ring, which affects the drive of the bobbin shaft and causes uneven thread quality.

The method of setting the gap between the bobbin shaft and the contact roll is, for example,
This can be done by inserting a spacer into the slide shaft of the upper and lower slides to which the contact roll is attached.

The high-speed winding referred to in the present invention refers to a spinning/winding speed of 5.50 (
IE-/A method for winding polyester filaments on a double body, typically using a spinning method that does not use a godent roll or a melt-spun polyester filament method disclosed in Japanese Patent Application Laid-Open No. 57-121613, etc. ? It is applicable to a method of winding the film onto a stub using a puttrol without substantially stretching it. Therefore, the filament of the package obtained by the method of the present invention is untwisted without twisting, and can be untwisted by winding or the like! It is distinguished from those who do.

The term "polyester" as used in the present invention refers to polyesters represented by polyethylene terephthalate, polybutylene terephthalate, etc., but a small amount of other materials may be added as long as the easy dyeability and dimensional stability, which are the characteristics of the yarn of the present invention, are not impaired. It may also contain a copolymer component, a stabilizer, an antistatic agent, and the like.

Conditions such as winding tension and winding angle are within the range adopted for normal winding.

By adopting the winding method of the present invention, when winding polyester filament manufactured at a high speed of 55 CIO islands/min or more, it is possible to obtain good results without causing "stick" defects or "sink mark" defects even when directly applied to fiil fabrics. It is possible to obtain knitted fabrics of high quality and to manufacture filaments.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples. In addition, each evaluation of Examples is based on the following method.

Contact roll speed fluctuation rate: The circumferential speed control device that controls the drive of the bobbin shaft using the circumferential speed of the contact roll detects the rate of change from the start of winding at the circumferential speed of the contact roll until the filament reaches about 5 layers on the bobbin. Record it on a recorder. Find each of the following equations from the records and find the speed fluctuation rate. The speed fluctuation rate at which no defects occur is 0.25% or less.

Detected 9 maximum speed Detected minimum speed set speed (rnZ minute) "Fushi"defect; Thickness of bobbin 1 piece/1! The filament in the part that has been removed? Nine "fushi" occurs on the gray fabric of Tomohira textiles obtained by making a daughter.
Count the number of defects and mark it as ◎~01l-pass.

0: Very good (number of borders: O) ○: Good (number of borders: 1 to 2, and 1 other) ×: Poor (number of borders: 3 or more) / After scouring and dyeing the plain woven fabric, the defect level of the weft "sink mark" is divided into four levels, and the W-
Q~1 will be one meeting in total.

W-Q: No sink mark at all W-1: Extremely small sink mark W=2: Sink mark W-6 Two strong sink marks Example 1 Boriethelene terephthalate with intrinsic viscosity [η) -0.61)? r Melt spinning at a spinning temperature of 605°C, 75a/36
Wrap f multifilament! Obtained as a 571 g cheese-like package.

Winding is carried out using a self-driven contact roll as shown in Figure 1ffl.
The winding was carried out using a winding machine with a rotating winder, with the gap between the bobbin and the contact roll being changed as shown in Table 1.

In this example, the following conditions are set, except that the winding speed is 7000rILZ in total.Bobbin outer diameter: 140mm φTraverse stroke: 160Tatsumaki take-up tension 0.25g/a Winding helix angle: 6゜self Control method of driven contact roll Two circumferential speed control method Drive crab of self-driven contact roll 100% Next, a layer of filament ′ (+-directly, A water jet loom (LW-51u) was supplied and woven, and a standard plain weave fabric with a warp density of 100 threads/inch and a weft density of 80 threads/inch was evaluated for "edge" defects and "sink mark" defects.

Table 1 shows the speed fluctuation rate of the contact roll during winding under various conditions and the evaluation results of the plain woven fabric woven from the obtained filaments.

Table 1 Examples of the present invention are Experiments/166.4.5.6, and the Ata products obtained in these examples did not have any "7" defects and the quality of the dyed fabrics was good. Hot friend.

Comparative Example 1 Winding was carried out under the same conditions as in Example 1, except that a driven contact roll without self-driven tV was attached and the gap between the bobbin and the contact roll was set to 100 μm in the next winding machine, and a 5 Icg cheese-like roll was obtained. After obtaining the package r, it was made into a #C product in the same manner as in Example 1. As a result of 7, the speed fluctuation rate of the contact roll is 1.12%
The fabric was thick and had no "edge" defects, but the weft "sink" was extremely poor with w=3.

Example 2 Winding was carried out under the same conditions as in Example 1, except for the winding speed and the length as shown in Table 2, with a gap of vioum between the roller and the contact roll, and 57 Cl? After obtaining the rolled cheese-like package, it was made into a fabric in the same manner as in Example 1.

The results are shown in Table 2. As is clear from Table 2, which filaments can be obtained by the winding method of the present invention? When used directly for the weft threads, the woven fabric had a high quality without any ``edge'' defects or weft ``sink'' defects.

Table 2 [Effects of the Invention] According to the winding method of the present invention, in winding polyester filament produced at a heavy speed of 5500171/min or more, a cheese-like package obtained even when directly applied to a knitted fabric. It is possible to produce a filament that produces knitted fabrics of good quality that do not produce "sticky" defects, "sink marks" or sounds in the part where the thickness of the filament stacked on the innermost layer bobbin is within one layer.

In particular, the present invention is particularly effective when the filaments are used as the warp and weft of textiles.

In addition, if paper gt is used as the bobbin and two windings are performed without a gap ti between the bobbin and the contact roll, the paper tube may sometimes be damaged due to the impact caused by the contact between the bobbin and the contact roll when the winding starts and the automatic switching occurs. However, according to the winding method of the present invention, there is no rupture of the paper tube, and it is possible to wind up the paper tube without any trouble.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the mechanism of a winding machine equipped with a self-driven contact roll, and Fig. 2 shows a state in which filament winding has started with a gap between the bobbin and the contact roll. This is a model prisoner. 1: Filament 2: Taze-shaped package 3:
Zabin 4: Contact roll 5: Bobbin shaft
6: IIc bin shaft drive device 7: Bobbin shaft drive inverter 8: Transmission device 9: Contact roll drive device 10:
Contact roll drive inverter 11: Contact roll vertical slide shaft 12 Ni spacer -% Applicant Asahi Kasei Co., Ltd. Figure 1 Figure 2 Procedural amendment (voluntary) September 1986 1Z Commissioner of the Japan Patent Office Black 1) Mr. Yu Akira 1. Indication of the case: 1985 Patent Application No. 17775
1 No. 2, Name of the invention Method for winding polyester filament 3, Relationship with the person making the amendment Patent applicant 1-2-6-4 Dojimahama, Kita-ku, Osaka-shi, Osaka Prefecture "Detailed Description" Column a Contents of Amendment (1) Lines 17 to 20 of page 12 of the specification are corrected as follows. that's all

Claims (1)

[Claims] Melt spun polyester filament 5500m/
When winding a cheese-like package using a spindle-driven winder in a time of 50 μm or more, a winder equipped with a self-driven contact roll is used, and at the start of winding, the distance between the contact roll and the bobbin is 50 μm or more and 400 μm. A method for winding polyester filament, characterized by winding the filament with the following gaps.