JPS6048870A - Polyester fiber winding method - Google Patents

Abstract

PURPOSE:To reduce the inner distortion depending on the winding position and the aging of thread quality, by employing specific reciprocation speed and winding speed of spindle in a spindle drive winder where the package under winding is made contactless against others. CONSTITUTION:The winding speed must be higher than 5,000m/min, preferably higher than 5,500m/min, where the thread produced through high speed spinning has such inner structure as crystal orientation fc>=0.85 while non-crystal orientation fa<=0.5 and since the inter-molecular bonding at the crystal portion is strong, it can be used practically as it is. While since distortion is not provided under winding and the distortion is not different depending on the position, a spindle-drive type winder is employed to wind under completely contactless state. Assuming the winding speed is V(m/min) while the speed of spindle mounted with a bobbin is T(cm/sec), it is reciprocated while satisfying the relation V/ 2,400<=T<=V/180 to form a package 15. Consequently, the thread path to be wound over the bobbin will never move as traverse motion but travel on substantially constant position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention has extremely low internal distortion due to the winding position of the inner, middle and outer layer portions of the package, the center portion of the end face, etc.

The present invention relates to a method for winding polyester fibers that have uniform and evenly dyed yarn quality, have little change in yarn quality over time, and can be put to practical use as is.

[Prior art and its problems]

Polyester fibers that can withstand 1C in practical use are generally supplied on the market as pear-shaped or cheese-shaped packages. There is a large difference in the internal strain between the woven and knitted fabrics, and when used as raw yarn for woven or knitted fabrics, periodic sink marks and streaks are likely to occur, resulting in a problem that significantly deteriorates the quality of the woven or knitted fabrics. is limited and tends to lack versatility.

We investigated the cause of this and came to the following conclusion.

(1) For cheese-shaped packages, it is necessary to traverse the yarn at high speed using a traverse guide that performs high-speed reciprocating motion during one winding. For this reason, the effective winding tension at both end faces of one rubber is higher than that at the central part, causing excessive distortion in the yarn. Moreover, due to the sudden turning of the traverse, a large impact force is applied to the yarn, and yarn pooling is likely to occur at both end faces, resulting in large distortions.

Therefore, from the time of winding, both end surfaces are in a state where internal strain is large. This tendency is amplified as the winding speed increases, because the traverse speed also increases accordingly. (2) Burn-shaped packages are generally wound by a drawing method using a draw-twisting machine. When winding up.

Since the spindle rotational speed is almost constant, the rotational speed of the trapeller changes with the amount of winding, so the actual winding tension changes. For this reason, different strains appear depending on the layer of yarn when it is wound.

Furthermore, in the case of a pirn shape, it depends on the position of the first roll.

Because the tightening force of the thread is different, the speed and amount of relaxation of internal strain after winding is different between both end faces and the center of the part.
As time passes, the magnitude of the residual internal strain is amplified.

(3) Relaxation of internal strain after winding occurs in both paan-shaped and cheese-shaped packages; this is because the higher the tension in the amorphous part of the wound thread, the higher the tension.

In other words, a yarn wound with the amorphous portion oriented in a red state is easily relaxed.

When weaving and weaving a woven or knitted fabric from the above Rita and subjecting it to heat treatment, the fixed strain is released and the amount of strain varies, causing problems such as sink spots and clusters.

Therefore, we conducted various studies to solve these problems, and found that the physical properties of the thread of the package taken in one roll were: ■ Degree of crystal orientation of the yarn (fc) fc2085 ■ Degree of amorphous orientation of the yarn (fa) f. ≦0.50■ The fluctuation width ΔT of the stretch tensile strength/con value when 4% stretching is measured in the fiber axis direction is 0.1 g/d or less ■ The average of the stretch ten/con value of the same as above for the center part and end face part of the package It has been found that the problem can be solved by setting the value difference R to 0.4 g/d or less.

However, it has been found that special winding conditions are required to obtain polyester fibers having the above-mentioned properties that can withstand practical use, and as a result of further study, the present invention has been achieved.

[Purpose of the invention]

In other words, the purpose of the present invention is to use the inside of the package.

There is very little internal distortion due to the winding position between the middle and outer layers, or between the center and end surfaces, and the yarn quality is uniform and evenly dyed.
The object of the present invention is to propose a method for winding polynistere fibers that exhibits all of the desired properties such as "and little change in yarn quality over time" and has poor VC resistance for practical use.

[Structure of the invention]

In other words, in the present invention, a polyester polymer is melt-spun, discharged from one spindle, cooled and solidified, and then an oil agent is applied thereto, and the yarn is intertwined with the fibers to give a substantially real twist. In the method of winding without bobbin, a winder and a spindle drive type winder are used. Speed T (cm /
A winding of polyester fiber characterized in that it is made to move reciprocatingly at a speed of 5,000 m/gin or more and is wound at a winding speed of 5,000 m/gin or more, with the yarn path always running at a substantially constant position without reciprocating movement. This is the note method.

Tatami, ■ is the winding speed (m/set ",") The present invention will be explained in detail.

The winding speed must be 5000 m/si+ or more.

A winding speed of 5500 m/win or more is preferable [7. The yarn spun at a controlled speed of 5 Q I] Om/sin or more is due to the structure development and formation during spinning.

The degree of crystal orientation fC is f, ≧085 (preferably fc-088), and the degree of amorphous orientation is fa≦0.50 (preferably fa≦04). Since the strength is high and strong, it is possible to put it into practical use with one spindle after spinning. If it is less than 5000 m/mih, it cannot be used as a vine yarn for practical use due to its high elongation and high shrinkage. It is necessary to wind up such high-speed spun yarn of 500 il m/mix or more in a winding method that does not impart distortion as much as possible and that does not cause a difference in the distortion pattern depending on the winding position. . For this reason, it is necessary to use a spindle drive type winder as the winder, and to wind the package in a completely non-contact state with other objects.

Even with a spindle drive type winder, it is not advisable to use roller bales that come into contact with the package, for example to control the winding speed. Even for other purposes, if there is a roller-like object that comes into contact with the pan cage, it will press down the package with a certain amount of surface pressure, which will cause the wound yarn to be pressed against each other and cause extra strain when winding the package. At the same time, the yarns overlap excessively, resulting in poor unwinding properties. However, in the present invention, it is important that the package during winding does not come into contact with any other object. Therefore, in order to control r(winding speed ff1f, the winding tension is detected and the spindle rotation speed is decreased according to the amount of winding to maintain a constant tension, or the pattern of decrease in the spindle rotation speed is memorized in advance. A program control, control, etc. that reduces the number of revolutions according to the time for one winding is applied.

In the present invention, using such a spindle drive type winding machine, the spindle equipped with the bobbin must be rotated to form a package. However, ■ is the winding speed [(m/-knee). Since the spindle itself performs a reciprocating motion in this manner, the thread to be wound on the bobbin always runs at a substantially constant position without having its thread path moved as in a traverse motion.

Therefore, there is almost no variation in the winding tension depending on the winding position of the package, and when winding at ultra-high speeds of 5000 m/sin or more, there is extremely little strain on the yarn, resulting in a uniform package. .

If the speed is too high, the inertial force of the spindle when folding both end faces of the pano cage is too strong, which may cause the package itself to chatter or buckle. In particular, as the amount of winding increases, this phenomenon becomes more pronounced.

On the surface, the deviation due to traverse between the previously wound yarn and the next wound yarn is small, and the yarns are too close together (too close together).As a result, tension fluctuations during unwinding are large and high-order processes It is preferable that .

By sequentially decreasing the winding width as the winding diameter of the yarn increases, a heavy taper angle can be imparted to the pancage, and a stable package form can be formed.

It is necessary to perform an interlacing treatment on the yarn before winding it into the casing to improve the cohesiveness of the yarn. By performing the interlacing treatment during spinning, it is possible to prevent abnormally high strain or stress from being applied to each single yarn during winding. The degree of entanglement is achieved by adding a slight disturbance (that causes disturbance of parallelism) so that the filaments are not completely parallel. Preferably, the number of entanglements on water is 1 co/m.
~70 pieces/m may be sufficient. The position where the confounding process is performed is the first
The godet roller R4l can be arbitrarily selected depending on the purpose, such as between the first godet roller and the second godet roller or between the second godet roller and the winding machine.

Especially when installed between the final godet roller (second godet roller in the above case) and the winder, the yarn path is constant and the winding tension is constant, so the entangling tension is constant and the winding is uniform. Good because it allows for confounding processing 11-
stomach. Furthermore, even when installed in front of the first godet roller or between the first and second godet rollers, the yarn is entangled and bundled at the exit of the final take-up godet roller, so the yarn is easily separated, and in addition, the winding tension is always maintained. Since it is constant, it is possible to form a package with extremely low winding tension, which is preferable.

As described above, the present invention provides a method for obtaining polyester fibers having desired properties by reducing the
This can only be achieved by winding yarn spun at a high speed of 1 or more under specific winding conditions such as reciprocating motion of the spindle.

On the other hand, there is a drawn-twist winding method in which undrawn yarn (lowly oriented, low-crystalline yarn) is supplied and drawn in a draw-twisting machine to produce a drawn yarn, and a direct spinning/drawing method in which spinning and drawing are continuous. The drawn yarn obtained by the above method is a yarn that shows high orientation even in its amorphous part, so the orientation relaxation of the amorphous part after winding is large (due to the stress distribution in the package over time). This causes the above-mentioned problems and is therefore outside the scope of the present invention.

Also, even if the winding speed is simply set to 5000 m/win vc.

If the yarn is not wound under the winding conditions specified in the present invention, the yarn of the wound package will not have the desired percent property.

It is widely used as a spinning machine. A Zerface drive type winder that winds the package by bringing it into contact with a drive roll, or winds it into a cheese shape. The cheese winder also requires reciprocating movement of the drive roll from the equipment point of view, and cannot be applied to the present invention.

What? In order to make the polyester fiber wound into a package more uniform, it is more effective to take into consideration the tension at the time of winding and the bobbin diameter. That is, since the relaxation of strain after the package VC is made depends on the tightening force, it is preferable to lower the tightening force as much as possible. Generally, when tightening a package, the force P is the distance r from the center of the package.
Although expressed as a point, it is preferable to decrease the value of P. Specifically, lower the winding tension T (rl) by 5.

Increase the radius of the innermost layer. In other words, it is unthinkable to make the bobbin diameter too large. The winding tension T(r) is 0.5 g/d, more preferably 0.5 g/d. ! +g/d or less. The bobbin diameter is preferably 2 inches larger in terms of production efficiency.

An example of an embodiment of the winding method of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of the spinning and winding process according to the present invention. The polyester yarn Y melted and discharged from the nozzle 1 is cooled and solidified while passing through a cooling device 2, and passes through an oil supply device 3 to a pair of first godet rollers 4 and a second godet roller rotating at a circumferential speed of 5000 m/sia or more. It is taken over by the godet roller 5.

The yarn coming out of the second godet roller 5 is subjected to appropriate interlacing treatment by the interlace nozzle B.

Passing through the yarn guide 8, the winding device 9vc and the pirn shape Ic
It is wound at a speed of 5000 m/sin or more.

The winding device 9 is of a spindle drive type and is independently driven by a drive motor 10. 1tltl+mo 11° is controlled by a tension detector 7 that detects the winding tension and a control panel 13 consisting of a power controller 12 and a tension setting device 11 so that the i winding tension is controlled via the control panel 13 to be constant VC. Motor roller control (-1) The winding speed is always controlled to be constant.

The winding device (spindle) 9 is connected to a hydraulic cylinder 14, and the winding device 9, that is, the package 15 itself reciprocates due to the movement of the hydraulic pressure/cylinder. Therefore, the yarn does not reciprocate, but always travels in substantially the same direction and is wound onto the pan cane. rotating package 15
is rotated without contacting anything.

The meaning of i6 ``running in substantially the same position'' includes slight yarn fluctuations due to entanglement processing, spinning tension fluctuations, etc., and cases such as those shown in FIG. 2.

When the guide 8 is fixed, depending on the amount of one winding, the thread path may be sequentially moved as indicated by θ as shown in Figure 2 (B+).Of course, the thread guide 8 and The winding device 9 moves little by little according to the total winding amount, and always maintains θ=
A more preferable method is to set the angle to 0°.

The polyester in iC16 of the present invention refers to a polyester fiber whose main repeating unit is an ethylene terephthalate unit, and whose main target is polyethylene terephthalate. It may also be a copolyester. Moreover, the cross-sectional shape of the polyester fiber can be applied to various known irregular cross-sections from a round cross-section.

〔Effect of the invention〕

The polyester fiber package obtained by the spinning and winding method of the present invention has an amorphous orientation lower than 0.50 and a crystal orientation degree of 0.8.
Since it is higher than 5, it is uniform throughout the package, so the heat setting effect is high;
/sin or more, it shows high productivity and it is possible to significantly reduce the yarn manufacturing cost.

(2) The fiber axis direction Vc is constant at 7111, and the slight variation ΔT of stretch tension/gin at 4% stretch is 01 g/d or less, preferably 0.07 g/d under JJ.

And the same as above (the difference R between the average values of the center part and the end face part of the straight pano cage is 0.1 g/
d or less, resulting in an extremely uniform yarn.

A pan cage having desired properties such as the following can be obtained.

Hereinafter, in order to clarify the present invention, specific examples will be described, and the measured values used in the examples were obtained by the following measurement method.

ill MARK [Tachi fC] Wu, next work King, 39,929 (19!
It is calculated using the following formula described in 19).

Here, H(010) is determined by X-ray diffraction method as equatorial gentleman (0
10) Position the detector seven times at the diffraction peak position.

It can be measured by rotating the sample at 8°/si+ within the sample plane. (010) intensity distribution curve half value 11]
Let be H(o+o).

Note that the X-ray diffraction conditions are the following general conditions.

(GuKα radiation (using Ni soil) Out crab 55”Vl 5mA Slit system - 2 major φ pinhole Goniometer: Manufactured by Rigaku Denki Co., Ltd. Light receiving slit: 1 x 1' tone Time constant: 1sec (2) Degree of amorphous orientation fa Calculate using the following formula.

Here, Δn is the birefringence of the fiber measured at a Konchen Center using a polarizing microscope. However, in the case of yarn with irregular cross section, JP-A-48-! Hama 11 was determined by the interference microscopy method described in Japanese Patent No. 15112.

``=:: Crystallinity calculated from the density ρ determined by the density method using the formula ρ-1'535

1t is the degree of crystal orientation in term (1).

The test yarn 17 taken out from the package 15 shown in FIG. 3 is a model diagram of a measuring device for ΔT measurement.
Adjust to d.

After adjusting to a constant tension by applying a load of 0.2 g/d between the rollers 20 and 22 at constant speed using the dancer roller 21 and the load 21', the rollers 2 arranged at an interval of +50 ya.
Since the roller 24 is elongated by 4% between 2 and 24, the surface speed of the roller 24 is 8.
Run continuously at 0 m/si+. At this time, the tension fluctuation in the extension part was detected by Pinkup 23, and
Record at a chart speed of a/sin. In the figure, f indicates a flexible contactless roller, S indicates a Seno Z rate roller, and 25 indicates a winding machine.

Figure 4 shows an example of the chart obtained by measuring with the apparatus shown in Figure 3. Char I length 15c of an arbitrary part.
Select 5 of the largest tension fluctuations in Tn ΔT+
, ΔT2...As Δ'rs, its average value ΣΔ
Let Ti15 be += as ΔT during fluctuation.

Average difference R The ΔT measurement is performed using the same device shown in Figure 3.

FIG. 5 shows a typical stretch tension chart, where t is the part wrapped around the end face of the package, and P is the part wrapped around the center part of the package. As shown in FIG. 5, let the average value of the stretch tensile strength/con value of the end face portion be xt, and let the average value of the stretch tensile strength value of the center portion be the average value of the stretch tensile strength value of the center portion, and calculate as R21xt-time.

Example Polyethylene terephthalate having an intrinsic viscosity [ηl = 0.61] was melted at a spinning temperature of 290°C, and a spinneret having 24 holes with a diameter of 0.6 mm was used to make the torque denier of the wound yarn 50 denier. Melt spinning was carried out at a discharge rate of The spinning and winding device shown in FIG. 1 was used, and winding was carried out by changing the reciprocating speed of the spindle at one winding speed. Confounding pressure 31
<V/c4 Taber angle 200. The conditions and yarn properties obtained are all shown in Table 1.

In the table, levels 1, 3, and 9 are comparative examples for clarifying the effects of the present invention. Levels 2°4 to 8 correspond to the present invention, and a package having desired characteristics was obtained.

Comparative Example Samples 1°2 were obtained by melt spinning and winding under various conditions at a discharge rate such that polyethylene terephthanyl having an intrinsic viscosity [ηJ=0.61 was 50 denier.

Sample 1> The yarn discharged from the nozzle was cooled and solidified, coated with an oil agent, heated to 85°C, and taken out in a pair of flannel-type heated loaves at a speed of 1000 m/sin.

Next, after stretching 35 times with a 17" Nelson-type heating roller heated to 160°C, the same spindle drive type winder as in Example 1 was used at a spindle reciprocating speed of 1Q (2B
/see, 3500 m/+in, and was wound into a barn shape with a taper angle of 20°.

<Sample 2> The winding speed was 6000 using the equipment shown in Figure 1 except for the winding machine.
High speed spinning of m/sin was carried out. In the wake of the volume,
Toshi Engineering TW60+ Cheese Winder
was used. The yarn properties obtained by winding at a take-up distance of 6000 m/sin and a traverse speed of 3250 cpm are shown in the second garment.

Table 2 Sample 1 has a large fa of the yarn obtained. In addition, the R after ingestion becomes large, resulting in so-called pern pique, which deteriorates the quality of the fabric. In sample 2, since the impact is applied to the yarn at a high traverse speed, the radius of the yarn is too large (1°).If both the spinning conditions and the winding conditions are not satisfied, it is difficult to obtain a fabric of good quality. could not.

[Brief explanation of drawings]

FIG. 1 is a schematic view showing an example of the spinning and winding process of the present invention. FIG. 2 is a side view for explaining the winding position of the present invention. FIG. Fig. 4 shows an example of a chart obtained by measuring ΔT using the apparatus shown in Fig. 3. Fig. 5 shows a model diagram of a measuring device for R measurement. A chart of the length of the wrench ten/9 mm measured by the device shown in the figure is shown. 1 Base 9 Winding device 2 Cooling device 10 Drive motor 3 Lubrication device 11 Tension setting device 4 First Godet roll 12 Power controller 5 Second godet roll 13 Control panel 6 Interlace nozzle 14 Hydraulic cylinder 7 Tension detector 15
Package 8 Thread path guide patent applicant Toshi Co., Ltd. Figure 2 Figure 4 Figure 5

Claims (1)

[Scope of Claims] A method of melt-spinning a polyester polymer, discharging it from five nozzles, solidifying it by cooling, applying an oil agent, and winding it without substantially applying real twist while performing an entangling treatment. In this case, a spindle drive type winder is used as the winder, the package being wound is completely out of contact with other things, and the spindle itself with the bobbin attached is moved at a speed T that satisfies the following formula. (crn/1lee), and the yarn path is always traveling at a substantially constant position without reciprocating, and the winding speed is 5000 m/111.
A method for unwinding polynisder fiber, characterized by winding it in the above manner. However, ■ is the winding speed (m/, i,)