JPS60128169A - Method of taking up polyamide fiber - Google Patents

Abstract

PURPOSE:To enable a stable package configuration to be formed in a spindle drive type take-up machine by reciprocating a spindle itself to which a bobbin is attached during taking-up with the take-up speed within a predetermined range. CONSTITUTION:Polyamide fiber Y from a spun yarn mouth piece 1 is air intercepted and processed by a nozzle 4 and stretched by goddy rollers 5, 6 to be taken up into the form of barn through a yarn path guide 8 with 4,500m/min or more speed by a traversing take-up unit 9. A drive motor 10 is controlled to have a constant take-up tension by a control board 13 consisting of a tension detector 7a, power controller 11 and a tension setter 12. And a package 15 itself is reciprocated by a hydraulic cylinder 14 such that the take-up speed V and the traverse speed T have the following relationship to each other; V/4,000<=T<=V/ 300, and a yarn path guide 8 is moved according to the winding diameter not to produce an angle theta between the vertical line and the yarn path. Thus, the yarn itself is not traversed so that a stable package configuration is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for high-speed spinning and winding polyamide.
The present invention relates to a method for winding polyamide fibers in a burn shape at high speed, which has little difference in internal strain depending on the winding position such as the inner layer part, end face, center part, etc., and has uniform and excellent level dyeing properties.

Burn and cheese shapes are common packaging for polyamide filament flat yarns.

Burn-shaped packages are usually obtained in a drawing stand where the winding and drawing steps are separated. In this method, the internal strain is large and the rotational speed of the traveler that guides the yarn changes with the amount of winding, so the actual winding tension changes. Furthermore, the actual winding tension at both ends of the burn and at the center at the time of turning back the traverse varies. For this reason, different internal strains are imparted to the fibers depending on the winding layer of the yarn, and on the end face and center portion.

As a result, when fabricated into a woven or knitted fabric, vertical lines or horizontal wrinkles may occur, or streaks may occur in the false-twisted yarn due to strain loops or variations within the yarn layers, which can easily cause defective fabrics.

On the other hand, cheese-shaped packages are usually obtained by high-speed spinning or direct spinning and drawing. In this method, the traverse guide reciprocates at high speed during winding, so that the actual winding tension at both ends of the traverse becomes higher than that at the center, causing large internal strain in the yarn. In addition, 6000
When the winding speed exceeds m/min, the package form bulges so much due to this internal strain that winding becomes impossible.

In order to reduce such internal strain, the usual direct spinning and drawing method employs a method of heating and heat-setting the yarn after drawing. If the direct spinning/drawing method is performed at a winding speed of about 3500 m/min or less, it is possible to wind it into a cheese shape. However, in a package obtained by winding at a high speed of 4500 m/min or more, the end face of the package bulges in the bobbin axial direction due to delayed recovery of the internal strain peculiar to polyamide fibers, and the width of the yarn layer eventually exceeds the length of the winding bobbin. becomes wide and becomes impossible to wind. It is possible to reduce this distortion to some extent by increasing the heat setting temperature or lengthening the heat treatment time, but this may adversely affect operability and increase equipment costs and power consumption. Therefore, it is not desirable. Furthermore, the yarn heat-treated in this manner cannot be effectively heat-treated in a post-process such as during false twisting, and its crimp properties are not improved.

In order to compensate for these drawbacks of the conventional methods, the present invention was achieved as a result of various studies.

That is, the purpose of the present invention is to reduce the internal distortion difference depending on the winding position in the package, and to create a yarn quality that is uniform and has excellent level dyeing properties, thereby improving the quality of knitted fabrics and the ability to pass through high-order processing. Our purpose is to supply polyamide fibers.

In order to achieve this object, the present invention melt-spun a polyamide-based polymer, solidified it by cooling, applied an oil agent, and then subjected it to an entangling treatment, without imparting substantial actual twist.
In the method of winding with a winding machine at a winding speed of 00 m/min or more, the winding machine is a spindle drive of a type in which the spindle itself on which the bobbin is attached reciprocates in the axial direction of the spindle during winding. Using a die winder, the package being wound is completely out of contact with other objects, and
The reciprocating speed T (m/min) of the spindle is calculated using the following formula % [However, ■ indicates that the winding speed (m/min > te).]
It consists of setting a range that satisfies the following.

In the case of nylon 6, the package obtained by the method of the present invention is formed of a yarn having an amorphous part orientation (F) of 0.3 to 0.6 and a γ-type crystal mixture ratio of 30% or more. In the case of nylon 66, the degree of orientation of the amorphous part (F ) O, '5''''5
~0.7 and a density of 1.135 Mcnt or more. . □□＠ a (' F ) B e
311 e'6'tie; or the density is 1.135f
If it is less than ll/cm, the temperature becomes too high and the melting start temperature □ in ■ for false twisting becomes too low to be practical. On the other hand, if F is too high or the γ-type crystal content is less than 30%, the setting property during false twisting is poor and the crimp characteristics of the false twisted yarn are poor.

It is necessary to wind such a yarn using a winding method that does not apply strain as much as possible during winding, and that does not cause a difference in the amount of strain applied 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 anything such as a roller bale that contacts 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 package, it will press the package with a certain amount of surface pressure.
The wound yarns are pressed against each other, causing extra strain during winding, and at the same time, the yarns overlap excessively, resulting in poor unwinding performance. That is, in the present invention, it is important that the package being wound up does not come into contact with any other object. To this end, the winding speed can be controlled by detecting the winding tension and decreasing the spindle rotation speed according to the amount of winding to maintain a constant tension, or by storing a pattern of decrease in the spindle rotation speed in advance. Program control or the like is applied to reduce the number of revolutions depending on the winding interval.

The present invention uses such a spindle drive type winding machine to wind a spindle with a bobbin attached to it.
It is necessary to form a package while making a reciprocating motion (hereinafter referred to as traverse motion) in the axial direction of the spindle at a speed of 4000-V/300 (m/min). However, ■ (m/1llin) indicates the winding speed.

Since the spindle itself is moved in a traversal motion in this manner, the yarn to be wound around the bobbin always travels in a substantially constant position without changing its yarn path. Therefore, there is almost no variation in the winding tension depending on the winding position of the package, and even when winding at a high speed of 4000 m/min or more, there is very little distortion imparted to the yarn, so a uniform package can be obtained.

Spindle traverse speed T is V/3001Il/m
If the speed is faster than in, the inertial force of the spindle when folding back both end surfaces of the package is too large, causing the package itself to crack or collapse. In particular, this phenomenon becomes more pronounced as the amount of winding increases. On the other hand, when the traverse speed T of the spindle is less than V/4000 m/min, the deviation between the previously wound yarn and the next wound yarn due to traverse is small, and the yarns are closely tied together on the package surface. Too close. For this reason, tension fluctuations during unwinding are large, causing problems in high-order processing steps. In order to reliably solve the above problem, it is preferable to control the traverse speed T to a range of V/3000≦T≦V1500.

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

In addition, the yarn tension just before the bobbin is wound is 0.1~
0.6 (preferably in the range of 1/d.0.1
(In the case of low tension such as less than 1/d, the winder
The thread is taken up by the godet roller that is fed to the machine. On the other hand, in the case of a high tension exceeding O16/d, the internal strain of the wound yarn becomes large, and the difference between the inner and outer layers of the pirn and the difference between the center and the ends becomes large, which is not preferable.

In addition, it is necessary to perform an interlacing treatment on the yarn before winding it 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 may be such that it causes a slight disturbance in parallelism so that the filaments are not completely parallel. Preferably, the evaluation of the number of entanglements on water is 1 co//
It may be about 70 m to 70 cm/m.

The position for the interlacing process may be in front of the first Godet roller, or between the second Godet roller and the winding machine, and can be arbitrarily selected depending on the purpose.

In particular, when installed between the final take-up godet roller (second godet roller in Figure 1) and the winding machine, the thread path is constant and the winding tension is constant, so the entangling tension is constant and the winding is uniform. This is preferable because it allows for interlacing treatment.

Furthermore, even when installed in front of the first Gode roller, the yarn is entangled and bundled at the exit of the final take-up Gode roller, so the yarn is easily separated, and in addition, the winding tension is always constant, making it extremely It is possible to form a package with low winding tension, which is preferable.

In order to obtain a package of polyamide fibers having desired properties, the present invention was first achieved by winding a yarn spun at a high speed of 4500 m/min or higher under specific conditions such as the traverse speed of the spindle. be done.

On the other hand, yarn that is continuously stretched after spinning and then wound up shows high orientation even in its amorphous parts, so the relaxation of the orientation of the amorphous part after winding is significant. , which causes stress distribution in the package over time, is not applicable to the present invention.

In addition, surface drive type winders, which are widely used as spinning winders, wind the package by bringing the package into contact with a drive roller, and cheese-shaped winders, single-rollers, and cheese winders, which From this point of view, it is also necessary to reciprocate the drive [1-ra], so this invention is not applicable.

An embodiment of the winding method of the present invention will be explained with reference to FIG. 1.

FIG. 1 is a schematic diagram showing the spinning and winding process.

The polyamide fiber MY melted and discharged from the spinneret 1 is cooled and solidified by the cooling device 2, and is oiled by the oiling device 3.
The entangling process is performed by the air entangling nozzle 4, and the first godet roller 5
After winding the thread guide roller 6 and the second godet roller 6,
After that, a spindle drive type winding device 9 in which the spindle itself is moved in a traversal motion is used to turn it into a burn shape.
It is wound up at a speed of 500 m/min or more.

The winding device 9 is of a spindle drive type and is independently driven by a drive motor 10. The drive motor 1O is controlled via a tension detector 7 that detects the winding tension and a control panel 13. a power controller 11 so that the winding tension is constant;
A control panel 13 consisting of a tension setting device 12 controls the drive motor so that the winding speed is always constant.

The winding device (spindle) 9 is connected to a hydraulic cylinder 14, and the movement of the hydraulic cylinder causes the winding device 9 and the package 15 itself to reciprocate and traverse. Therefore, the yarn does not undergo any traverse movement, but always travels in substantially the same position and is wound into the package. The rotating package 15 is rotated without contacting anything else. Note that "traversing substantially the same position" herein includes slight yarn fluctuations due to entanglement processing, fluctuations in spinning tension, etc., and slight changes in the yarn path due to thickening of the yarn as shown in FIG.

FIG. 2 shows a state (A) at the beginning of winding onto the bobbin 16 and a state (B) where the winding is somewhat thick. When the yarn path guide 8 is fixed, the yarn path sequentially moves as shown in FIG. 2 depending on the amount of winding, and the angle θ between the vertical line and the yarn path gradually increases. In order to prevent this θ from occurring, it is preferable to move the position of the yarn path guide 8 and/or the winding device 9 little by little in accordance with the amount of winding so that θ=06 at all times.

The polyamide in the present invention is preferably an alkylene polyamide having 10 or less methylene groups per amide M, such as polycapramide, polyhexamethylene adipamide, polyhexamethylene sebaamide, etc. However, in some cases, some of the alkylene groups may be replaced by aromatic groups. Alternatively, other types of polyamide-forming components may be copolymerized as long as the properties are not substantially changed. It may also contain matting agents, colorants, stabilizers, pigments, hygroscopic agents, fillers, and the like. Moreover, those having a relative viscosity of 2.0 to 3.5 when using a 1.0% by weight solution of sulfuric acid (98%) as a solvent are preferable.

Further, the cross-sectional shape of the polyamide fiber may be a round cross-section or various irregularly shaped cross-sections.

The polyamide m-fiber package obtained by the high-speed spinning and winding method of the present invention has the following effects.

(1) By traversing the spindle itself with the bobbin attached and keeping the thread path at a substantially constant position,
A uniform package can be obtained even when winding is performed at a high speed of 4500 m/sin or higher.

(By setting the traverse speed of the two spindles within a specific range, it is possible to obtain a polyamide yarn with a good package shape and suitable for use in knitted fabrics.

(3) The orientation degree (F) of the amorphous part is in the range of 0.3 to 0.6 (nylon 6), 0.55 to 0.7 (nylon 66), and the mixed ratio of γ-type crystals is 30% or more (nylon 6). 6), Density 1.
Since it has properties of 1350/a+ or higher (nylon 66), it has high uniformity and level dyeing properties, good color fastness, and excellent stability over time, making it suitable as a raw yarn for false twisting.

(4) Since the take-up speed is 4500 m/min or more,
It has high discharge productivity and can significantly reduce yarn manufacturing costs.

Examples are given below and explained, and the amorphous part orientation 1 (F), γ-type crystal mixture ratio, density, stretch tension, winding tension, and processed yarn properties (level dyeing property, crimping fastness) used therein are explained below. degree) is 11a measured by the following method.

[Degree of amorphous partial orientation (F)] Separate the fibers with a length of 3 cm into individual filaments, which are coated with a fluorescent agent Whi.
tex R, P, O, in a 2% owf aqueous solution for 2 hours,
Soak at room temperature. After that, it was washed with water, air-dried, and placed on the sample stand of a FOM-1 type polarized fluorophotometer manufactured by JASCO Corporation.
The crimp is stretched and pasted under a tension of 5 a/d, and the polarization angle distribution of the fluorescent light emitted from the fluorescent agent molecules bonded to the amorphous portion is continuously measured. Amorphous orientation degree (F)
The fluorescence polarization intensity in the direction of the fiber axis is 81, and when the fluorescence polarization intensity in the direction perpendicular to the fiber axis is b, F=1-b/a
For each sample, F was the average value of three samples.

[γ-type crystal mixture ratio] The samples were aligned, the ACRN length was 40 mQ, and 1111II was obtained.
The fibers are made into a one-width fiber bundle and irradiated with X-rays emitted from a D3-F type X-ray diffractometer manufactured by Rigaku Denki Co., Ltd. At that time, the counter is illuminated while rotating the sample on a plane perpendicular to the irradiation beam.
Scan the angle from 80 degrees to 5 degrees with respect to AwA to find the diffraction intensity curve, and calculate the integrated diffraction intensity from 30 degrees to 15 degrees.
degree is A115 degree to 8.5 degree is 8, B/A
is determined by the area weight method. On the other hand, complete γ-type crystal fiber obtained by iodine treatment and complete α-type crystal Il obtained by heat treatment
B/A was measured for samples in which fibers and fibers were mixed at varying M mixing ratios, and the relationship between the heavy mixing ratio C and B/A was graphed in advance, and from the graph, the B/A determined above was
Determine by reading the γ-type crystal mixture ratio C corresponding to /A.

[Density] A density gradient solution was prepared by continuously changing the mixing ratio of carbon tetrachloride and toluene, and the density was measured using the density gradient tube method (using a continuous density measuring device manufactured by Shibayama Scientific Instruments Co., Ltd.).

[Stretch Tension J A pair of actively driven rollers consisting of a 10th roller and a 20th roller are provided, and a yarn running between the rollers at a speed of 160 m/min is stretched by 5%. At the same time, a strain gauge is installed between the 10th and 20th la to measure the stress in the yarn, and this stress is called stretch tension.

The maximum stretch tension difference within the burn is the difference between the maximum stretch tension within the burn (usually present in the middle layer of the burn) and the minimum value (usually present in the outermost or innermost layer of the burn). ).

[Winding Tension 1 Toshishiki Co., Ltd.'s rotary tension system FTP type TTM-851 was used, and the pickups were o-20a and 0-100!11.

[Level dyeing property] Each processed yarn is knitted into a tube fabric (cylinder with 320 needles, 1 m/1
course) and Neugen SS 2%owf70℃X20
Refined with m1n, water-washed Paratine 31ac
kPRO, 5% owf (auxiliary agent: ammonium sulfate 3% owf) dye (bath ratio 1:50) and heated to 60°C for 20 ml.
After raising the temperature at , leave it as it is for 301 nm, wash with water, and air dry.

The presence or absence of dyeing spots on the knitted fabric is determined with the naked eye.

O: No dyeing spots △: Some dyeing spots ×: Dyeing spots [Crimp fastness] S-Z false-twisted threads were pulled together, taken all together, and 0.1 Md
After stretching the crimp under a load of 60 cm under a tension of 2 mg/d.
℃×51n of fresh water treatment, concentrated to 98℃ with 10ml of water, and 98℃×20n+in of fresh water treatment. This mixture was air-dried, placed in water at 20°C with a cart of O, 1Md, and
Read the length to after min, immediately change the load to 2 mg/d, read the length il after 2 min, and calculate by the following formula.

Crimp fastness = (to-tl)/2ox100 (%) Example 1 Nylon 6 chips with a sulfuric acid relative viscosity of 2.6 were spun at a temperature of 26
The fiber was melted at 5°C, using a spinneret with 24 holes with a diameter of 0.3111111, and the fineness of the fiber after false twisting was 70.
Melt spinning was carried out at a discharge rate that would give a denier. After spinning,
The winding device was as shown in FIG. 1, and the winding speed and the traverse speed at which the spindle reciprocated were changed. Table 1 shows the values and the properties of the processed yarn obtained by false twisting the wound yarn.

In addition, the pressure of T-entanglement is 1ko10#, and the taper angle is 20
°, and the winding tension was 15 (+).

The false twisting process was performed using a spindle false twisting machine with a heater length of 1.2 m and a spindle rotation speed of 500,000 rpm.

The number of false twists was 3500 t/m, and the heater temperature was 185°C. The overfeed rate was adjusted so that the heating tension was 8 g.

As can be seen from Table 1, when the winding conditions were appropriate, the properties after processing were good.

Example 2 Nylon 66 fabric was produced in the same manner as in Example 1, except that the chips were changed to nylon 66 chips with a sulfuric acid relative viscosity of 2.6, the spinning temperature was 290°C, and the heater temperature during false twisting was 230°C. A twisted yarn was obtained.

The results are shown in Table 2.

As can be seen from Table 2, even in the case of nylon 66, when the winding conditions were appropriate, the properties after processing were good.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the spinning and winding process in the present invention. FIG. 2 is a side view for explaining the winding position on the spindle in the present invention. 1: Spinneret 2: Cooling device 3: Oil supply device 4: Air entangling nozzle 5: First Godet roller 6: Second Godet roller 7: Tension detector 8: Yarn path guide 9: Winding device 15: Package 16: Bobbin patent application Hito Toshi Co., Ltd.

Claims (1)

[Scope of Claims] A polyamide polymer is melt-spun, solidified by cooling, applied with an oil agent, then subjected to an interlacing treatment, and wound at a winding speed of 4500 m/min or more without imparting substantial real twist. In the method of winding on a winding machine, the winding machine is a spindle drive type winding machine in which the spindle itself on which the bobbin is attached during winding reciprocates in the axial direction of the spindle; The package is completely out of contact with other objects, and the reciprocating speed of the spindle T (m/m
A method for winding polyamide l1m, characterized in that in ) is within the range of the following formula. V/4000≦T≦V/300 [However, ■ is the winding speed (m/1n). ]