Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/12—Stretch-spinning methods
  • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
  • D01D10/02—Heat treatment

Definitions

• the present invention in the production of synthetic fibers, particularly industrial fibers, in which undrawn yarn is drawn and heat-treated using a plurality of godet rollers to produce a drawn yarn, there is no deposit on the surface of the high-temperature godet roller.
• problems such as yarn breakage and fluffing by suppressing the accumulation, to maintain the drawing and heat treatment of synthetic fibers stably for a long period of time, and to remove deposits on the godet roller.
• the present invention relates to a method for producing a high-strength synthetic fiber, which improves the operation rate by reducing the number of stoppages, and further reduces the wear on the surface of the godet roller, thereby improving production efficiency, and a yarn traverse device directly used in the production method. Things. Background art
• Abnormalities in the stretched state referred to here mean that the surface frictional force is high due to foreign matter adhering and accumulating on the surface of the godet roller, the running yarn is wound around the godet roller, The single yarn may be cut and become fluff, and the yarn itself may be cut.
• the deposits deposited on the godet roller there are mainly fixed substances generated by the oil agent applied to the yarn being denatured by heat on the stretching heat treatment roller, and genuine sesame seeds precipitated from the yarn. And their thermal metabolites and the Siri force contained in water.
• Japanese Patent Application Laid-Open Nos. 9-78464 and 8-187469 For each of the devices, there has been proposed a device for cleaning attached deposits by bringing a scraper blade or a rotating brush into contact with the surface of a godet roller.
• a high-temperature heating roller is often used as a godet roller.
• the above-mentioned scraper blade or rotating brush makes it easy to remove the attached deposits.
• Can not since high-tensile yarns are drawn with high tension, breakage of devices such as scraper blades and rotating brushes installed in close proximity to the godet roller occurs frequently due to the thread with one roll generated after cutting the yarns. There was also a problem that would.
• Japanese Patent Application Laid-Open No. Hei 8-170215 proposes a method and an apparatus for reciprocating (traverse) a running yarn on a godet roller by a yarn path guide in the field of manufacturing textile fibers. ing.
• the production of industrial fibers usually has a greater fineness than that of clothing fibers and is stretched at a high magnification, so that single yarn breaks and yarn breaks occur more often than in the production of clothing fibers. Notable. Furthermore, since the surface temperature is set higher than that of the godet roller used in the production of textiles for clothing, the accumulation of deposits due to the thermal modification of the oil agent on the godet roller is remarkable, which has an effect. The problem is that it clearly appears in the quality of the yarn to be produced.
• a drawing auxiliary device between multiple drawing rollers that is, an air guide to prevent breakage of single yarn on the rollers, and a heat treatment tube to fix the draw point Since a hot plate, a heat treatment tube, and the like are provided for drawing assistance, when the traveling yarn is reciprocated, a deviation occurs between the drawing assistance device and the traveling yarn. There was also a problem that the running yarn was cut due to the rubbing with the rubber. Disclosure of the invention
• An object of the present invention is to produce a drawn fiber by stretching and heat-treating an undrawn yarn using a plurality of godet roller groups to produce a drawn yarn, particularly an industrial fiber.
• By performing high-temperature and high-magnification stretching while suppressing the accumulation of deposits the drawbacks such as yarn breakage and fluff, which are remarkable in industrial fibers, are eliminated, and high-strength synthetic fibers are stretched and heat-treated.
• a method for producing synthetic fibers that maintains stability for a long period of time, reduces the number of stoppages for removing deposits on the godet rollers, improves the operation rate, and improves production efficiency, and a yarn traverser directly used in the production method.
• a service device is to produce a drawn fiber by stretching and heat-treating an undrawn yarn using a plurality of godet roller groups to produce a drawn yarn, particularly an industrial fiber.
• a method for producing a synthetic fiber according to the present invention comprises a method for producing a synthetic fiber which is obtained by subjecting a melt-spun synthetic fiber yarn to multi-stage drawing and heat treatment using a plurality of godet rollers and subsequently winding it. Wherein at least two sets of the godet rollers have a surface roughness Ra of 0.5 to 5 im, and at least one set of these godet rollers has one surface.
• a godet roller having a temperature of (the melting point of the synthetic fiber is 170 ° C.) or more and using a godet roller Reciprocating in the direction of the rotation axis of the roller.
• the tension of the yarn in the final drawing step of the multistage drawing is 1.4 cN / dtex or more.
• the total fineness of the synthetic fiber is 2 O O d t e x or more
• the yarn is a multi-thread of at least two yarns
• XF indicates the yarn width (mm)
• XP indicates the yarn pitch (mm) between adjacent yarns.
• the synthetic fiber of the present invention is used.
• the yarn consolidation guide that allows the yarn to pass before and after the Z or the Z or the rotation is synchronized with one or a plurality of drawing assist devices disposed between the plurality of godet rollers, thereby synchronizing the yarn.
• the following (f) to (U) are preferred embodiments, By applying these conditions, a better effect can be expected to be obtained.
• the stretching is a multi-stage stretching of at least two or more stages.
• the yarn is a multi-thread of at least two yarns
• the drawing assist device is a yarn entanglement device.
• XF indicates the yarn width (mm)
• XP indicates the yarn pitch (mm) between adjacent yarns.
• the period of the reciprocating motion is 5 seconds or more.
• the yarn traversing apparatus of the present invention is an apparatus used in a method for producing a synthetic fiber in which a melt-spun synthetic fiber yarn is stretched and heat-treated through a plurality of godet rollers and wound up.
• a yarn bundling guide for passing the yarn before and after Z or after the yarn is rotated by the godet roller immediately after spinning; a drawing assist device disposed between a plurality of godet rollers; And a means for synchronizing the strip focusing guide and the stretching assist device.
• Means for synchronizing the yarn collecting guide and the drawing auxiliary device include a drive motor, a shaft attached to the drive motor in the direction of the rotation axis of the godet roller, and a yarn attached to the shaft.
• Means for converting the connected rotational motion into a reciprocating motion and the means are configured such that the thread collecting guide and the stretching assist device slide in the direction of the rotation axis of the godet roller, respectively.
• Means for synchronizing the yarn collecting guide and the drawing auxiliary device include at least two drive motors, a shaft attached to each of these drive motors in the direction of the rotation axis of the godet roller, and each of these shafts.
• the yarn focusing guide and the drawing assisting device are attached to each other, and the means for converting the rotational movement into a reciprocating movement respectively connected to the drawing assisting device and the drawing assisting device. It must be configured to slide in the direction of the roller's rotation axis.
• phase detection means for detecting that the shaft attached to each of the drive motors has rotated to a predetermined position, wherein the means for synchronously moving the yarn collecting guide and the drawing assistance device in the above (k) is used.
• the yarn bundling guide and the drawing assist device are for at least two yarns
• the drawing assist device is a yarn entanglement device.
• FIG. 1 is a front view schematically showing a spinning / drawing apparatus to which the yarn traverse device of the present invention is attached
• FIG. 2 is a schematic side view of the apparatus shown in FIG. 1
• FIG. FIG. 4 is a schematic perspective view of a yarn traverse device according to another embodiment of the present invention
• FIG. 4 is a schematic perspective view of a yarn traverse device according to another embodiment of the present invention
• FIG. 4 is a block diagram showing a control unit of FIG.
• Examples of the synthetic fiber used in the production method of the present invention include yarns made of polyamide, polyester, polyolefin, and aramide.
• the spun yarn can be stretched and heat-treated using a godet roller. There is no particular limitation as long as the material is possible.
• the surface roughness Ra of at least two sets of the godet rollers used in the present invention is required to be 0.5 to 5 ⁇ m, and preferably 1 to 3 im. .
• one set of godet mouth rollers is one set having the same rotation speed for turning the yarn ⁇ or more rounds, for example, the first godet roller (18a and ⁇ 8b) in Fig. 1.
• the surface roughness Ra is as follows: According to JISB0601, using a Surfcorder SE 1700 manufactured by Kosaka Lab, stylus radius 2 im, feed rate 0.5 mm, cutoff 0.8 mm or 2. It is calculated by obtaining the roughness curve of the godet roller surface from the measured cross-sectional curve with 5 mm.
• the drawing is performed not only between the rollers but also during the multiple turns of the yarn on the rollers. Done.
• 8 & is smaller than 0.5 im or larger than 5 im, the frictional force acting between the yarn and the roller increases, and it is difficult to stretch the yarn on the mouth.
• the surface roughness Ra is 1 to 3 im because the frictional force is further reduced.
• the melting point of the yarn is determined by melting 2 mg of sample using Perkin-Elmer DSC-7, solidifying it rapidly with liquid nitrogen, and scanning the sample at a rate of 20 ° C / min.
• the maximum endothermic peak temperature is determined from the calorific value change trace obtained in this way.
• the temperature is lower than this temperature (the melting point of the synthetic fiber yarn is less than 70 ° C), the drawing cannot be performed stably, and the thermal dimensional stability of the drawn yarn is reduced due to insufficient heat treatment. It is not preferable for the production of industrial fibers which is the object of the present invention.
• heat treatment is performed under such high temperature conditions, oil adhering to the yarn on the godet roller surface
• the heat-transformed product caused by the agent accumulates and causes breakage of single yarns and yarn breakage.
• by reciprocating the yarn in the rotation axis direction of the godet roller such a modified oil-based product is produced. Deposition can be prevented.
• the present invention can suppress the denaturation and accumulation of the residue caused by the oil agent by organically combining the above structures, and stably produce high-strength industrial fibers.
• Gain If the surface roughness Ra of the roller for performing the heat treatment is smaller than 0.5 im, the contact area between the traveling yarn and the roller becomes large, so that the yarn is moved in the rotation axis direction of the godet roller.
• the effect of the present invention cannot be obtained because the denatured product sticks to the roller surface and the denatured product accumulates at both ends of the movement amplitude.
• the surface roughness Ra of the mouth roller is set to 0.5 to 5 im and the yarn is moved in the direction of the rotation axis of the godet roller, the accumulation of the oil-modified product can be prevented.
• the invention is achieved. Furthermore, the effect of the present invention is remarkably exhibited by setting to 3 im.
• the yarn collecting guide when the yarn is reciprocated, if the yarn path guide is simply moved, the yarn breaks due to the loosening of the yarn due to the loosening of the yarn. Can be prevented.
• the yarn bundle guide serves to organize running yarns when the synthetic fiber is spun and drawn, and is preferably a guide used for organizing spun yarns.
• a method of reciprocating the yarn collecting guide a method of using a means for converting the rotational movement into a reciprocating movement, that is, a method of changing the rotational movement of the motor into a reciprocating movement by a cam, a method of reciprocating the rotational movement of the motor by a ball screw How to turn into exercise, A reciprocating motion by repeating the linear motion of the Linda; and a reciprocating motion via a gear in a stepping mode; ⁇ method.
• the effect of the present invention becomes remarkable because the amount of oil applied to the roller increases.
• the yarn used in the present invention is preferably a multi-thread of two or more yarns.
• single yarn breakage or the like can be reduced for each yarn, so that a large synergistic effect can be obtained.
• the reciprocating width Y (mm) of the reciprocating motion of the yarn preferably satisfies the following expression (1).
• XF in the expression represents the yarn width (mm)
• XP represents the yarn pitch (mm) between adjacent yarns.
• the reciprocating cycle of the yarn collecting guide is preferably 5 seconds or more from the viewpoint of reducing the damage of the running yarn on the godet roller and reducing the failure rate of the traverse device. More preferably, 30 seconds or more are more preferable.
• the drawing assisting device is a yarn entanglement device to prevent single yarn breakage on the roller, a heat treatment tube for fixing draw points, a hot plate for drawing assistance, and a heat treatment tube to assist drawing smoothly. This is a generic term for the devices that perform the operations.
• the term “synchronous” means that the yarn collecting guide and the drawing auxiliary device have a certain relationship when reciprocating, and preferably, both of the yarn collecting guide and the drawing auxiliary device. It means that it has a certain phase difference when reciprocating.
• the direction of the rotation axis of the godet roller means that one component of the motion vector is parallel to the direction of the rotation axis of the godet roller.
• a method of reciprocating the yarn bundle guide and the drawing assist device there are a method of changing the rotational motion of the motor into a reciprocating motion by a cam, a method of changing the rotational motion of the motor into a reciprocating motion by a ball screw,
• a method of reciprocating the cylinder by repeatedly performing a linear motion of the cylinder and a method of reciprocating the stepping motor via a gear.
• a method of synchronizing the yarn bundle guide and the drawing auxiliary device two or more When using a motor / cylinder of the same type, a method of detecting and synchronizing the position of the rotary shaft / cylinder and the position of the thread using a sensor, and synchronizing the output of one motor / cylinder, etc. It is preferable to use a method in which the yarn is collected by a shaft, and the yarn is bundled through a cam or gear to synchronize the yarn collecting guide with the drawing auxiliary device.
• the yarn used in the present invention is preferably a multi-thread of two or more yarns.
• the yarn bundling guide should be designed for each yarn, that is, the number of yarns should be set, and all yarns should reciprocate simultaneously. Is preferred.
• the drawing assisting device is a yarn entanglement device
• effects such as a reduction in single yarn breakage appear particularly remarkably.
• the reciprocating motion cycle of the yarn collecting guide is preferably 5 seconds or more, more preferably 30 seconds or more.
• FIG. 1 is a front view schematically showing a spinning / drawing apparatus equipped with the yarn traverse device of the present invention
• FIG. 2 is a side view thereof
• FIG. 3 is a second actual example of the yarn traverse device of the present invention
• FIG. 4 is a schematic perspective view showing a third embodiment of the present invention
• FIG. 5 is a block diagram of control means of the phase detection device in the embodiment shown in FIG.
• the yarn traverse device of the present invention is used directly in the above-described method for producing a synthetic fiber, and passes through the yarn before or after Z or rotation by the godet roller immediately after spinning.
• the focusing guide to be moved is reciprocated (traversed), and in synchronization with this, one or more of the stretching assist devices are traversed.
• the yarn traverse device of the present invention is a device for suppressing the accumulation of deposits on the surface of the godet roller during spinning and drawing of the synthetic fiber yarn, and rotates the yarn by the godet roller immediately after spinning. Pass the yarn before and / or after it is swirled. Reciprocate in the rotation axis direction of the godet roller while synchronizing the yarn bundling guide and the drawing assist device arranged between the godet rollers. It is characterized by comprising means.
• a plurality of synthetic fiber yarns (2 3) are spun from a spinning duct (1), supplied with oil by an oiling roller (2), and then attached to a mounting plate. After passing through the focusing guide (6) attached to (3), it is pre-stretched between the first godet roller (18) and the second godet roller (19), and the second godet roller (19) And a third stage between the third godet roller (20) and the fourth godet roller (21), and a second stage between the third godet roller (20) and the fourth godet roller (21).
• a stretching assist device (5) for example, Device is disposed.
• the focusing guide and the stretching assist device in Ming are not limited to this position. Then, as shown in FIG.
• a means for synchronizing and moving the focusing guide (6) and the stretching assist device (5) in parallel that is, a drive motor (4), and this drive motor (4)
• a shaft (8) attached in the direction of the rotation axis of the godet roller, and two cams (7) attached to this shaft (8) and connected to both the focusing guide (6) and the stretching assist device (5) ) Is provided, and by such means, the focusing guide (6) and the stretching assist device (5) can be moved accurately in synchronization with each other, whereby the yarn (23) Reciprocates in the direction of the rotation axis of the godet roller with respect to the running yarn.
• FIG. 3 shows a second embodiment of the yarn traverse device according to the present invention.
• a shaft (8) is attached to a drive motor (4).
• the drive motor (4) and the shaft may be in direct contact with each other, but it is preferable to use a reduction gear (9) as shown in the figure, because the desired rotation speed can be obtained. It can be moved at a sufficiently low speed so as not to give
• cams (7a, 7b) are attached to the shaft (8) attached to the running yarn in the direction of the rotation axis of the godet roller, and attached to the extension assist device mounting plate (10).
• the stretching assist device (5) and the focusing guide (6) attached to the focusing guide mounting plate (3) are fitted with sliding rollers (13a, 13a) provided on the respective mounting plates (10, 3). It is in contact with each cam (7a, 7b) via 1 3b).
• the extension assisting device mounting plate ( ⁇ 0) is mounted on a stationary slide rail (11) so as to slide in the longitudinal direction of the shaft (8). Furthermore, the focusing guide mounting plate (3) is similarly mounted on a stationary slide bearing (1 2) using a slide shaft (1 4) so that it can slide in the longitudinal direction of the shaft (8). It has become.
• the focusing guide mounting plate (3) and the extension auxiliary device mounting plate (10) are provided along the grooves of the two cams (7a, 7b) rotated by the drive motor (4).
• the sliding rollers (13a, 13b) move, the focusing guide mounting plate (3) moves along the length of the shaft (8) to the slide bearings (1 2) and the slide shaft (1 4).
• the extension assist device mounting plate (10) slides on the slide rail (11)
• the focusing guide (6) and the extension assist device (5) move in the direction of the godet roller's rotation axis. They reciprocate synchronously.
• FIG. 4 shows a third embodiment of the yarn traverse device according to the present invention.
• the convergence guide (6) and the stretching auxiliary device (5) are each provided with a separate drive motor (4a).
• And (4 b) are mounted on separate shafts (8a, 8b) via separate cams (7a, 7b) to reciprocate, and each cam (7 A phase detection means for detecting that a, b) has rotated to a predetermined position is attached, and the control panel (17) shown in Fig. 5 detects the predetermined position by the phase detection means on either side.
• the rotation of the shaft provided with the phase detecting means is stopped, and when the predetermined position is detected by the other phase detecting means, the stopped shaft is rotated to synchronize.
• the focusing guide (6) and the stretching assist device (5) are driven by the separate driving motors (4a, 4b), except that It reciprocates by the same structure as the means of the first embodiment.
• each of the cams (7a, 7b) has a detected part (16a, 16a,
• proximity sensors (15a, 15 b) are attached, and the proximity sensor (15 a, 15 b) is attached to the part that cannot be rotated by the drive motor (4 a, 4 b) such as a reduction gear (9 a, 9 b). b) is provided for each.
• These proximity sensors (15a, 15b) can be mounted at any location as long as they cannot be rotated by the drive motor (4a, 4b).
• reduction gears (9a, 9b) May be provided on a bearing portion or the like, and may also be provided on a stretching machine body or the like.
• Each cam (7a, 7b) rotates, and the detected part (16a) and the proximity sensor (15a) or the detected part (16b) and the proximity sensor (15b) face each other.
• the signal output from the proximity sensor (15a, 15b) is reflected by the detected part (16a, 16b) and detected by the proximity sensor ( ⁇ ⁇ ⁇ 5a, 15b). Is done.
• the proximity sensor detects the object to be detected
• the detection signal is input to the control panel (17).
• the control panel (17) is connected to the proximity sensor (15a) and proximity sensor (15b) and the drive motor (4a) and drive motor (4b) as shown in Fig.5.
• the drive motor (4a) provided with the proximity sensor (15a) stops rotating and the other proximity sensor (15a) stops rotating.
• the stopped drive motor (4a) is configured to rotate.
• the proximity sensor used in the present invention is preferably a photoelectric proximity sensor, but may be a capacitance type or a magnetic type as long as it achieves a desired purpose.
• the focusing guide (6) and the stretching assist device (5) reciprocate accurately and synchronously. If there is more than one extension assist device, the rotation is stopped sequentially from the drive motor equipped with the proximity sensor to which the detection signal was input first, and all stops when the last detection signal was input during one round trip It is only necessary to drive the drive motor by the control panel.
• the aspect of the third embodiment is effective when it is difficult to drive the focusing guide and the extension assisting device by one shaft.
• the cycle of the reciprocating motion of the yarn traverse device of the present invention is preferably 5 seconds or more, and more preferably 30 seconds or more, from the viewpoint of reducing the damage of the running yarn and reducing the failure rate of the traverse device. Is more preferable.
• a pole screw and a gear may be used instead of the above-mentioned drum (7).
• the use of cams is not limited to these, but the use of cams is preferred in terms of cost and ease of use.
• the traverse width of the focusing guide and the stretching assist device can be changed to a desired width. Accordingly, the focusing guide and the stretching assist device can be reciprocated in synchronization with a certain phase difference.
• the bundling guide and the drawing assisting device of the present invention do not limit the number of yarns, Preferably, it is for multiple yarns.
• it is for multiple yarns.
• dirt on the godet roller appears remarkably, so that the intended effect can be more remarkably exhibited.
• more preferable effects can be obtained when a yarn entanglement device is used as a drawing assisting device.
• the yarn entanglement device needs to position the yarn at the air blowing intersection, and is sensitive to the displacement of the running yarn.
• a fluid cylinder or the like may be used instead of the above-described means using the drive motor, the shaft and the cam, but from the viewpoint of repair of the device and cost. The above method is preferred.
• the godet roller can be kept in the initial state for a long time.
• a 2 mg sample was melted using Perkin Elmer DSC-7, quenched and solidified with liquid nitrogen, and the sample was obtained by scanning at a rate of 20 ° C / min. It was determined from the calorific value change trace. The melting point was the temperature of the maximum endothermic peak. The melting point of the drawn yarn obtained by the present invention was 250 ° C.
• the godet roller surface was measured using a contact thermometer.
• the tension of the running yarn between the third godet roller and the fourth godet roller was measured using a tension meter HS-3000 made by E IKO SOKK I, and the tension was determined by dividing by the total fineness of the drawn yarn.
• the number of single yarn breaks was counted by a single yarn break detection device, and the number of single yarn breaks per 10 million m was expressed.
• the state of the yarn path on the roller was visually observed every 24 hours, and it was determined that 0 was slight dirt, ⁇ was dirt, and X was dirt and the yarn was large.
• the obtained yarn was placed in a skein shape, left in a temperature control room at 20 ° C and 65% RH for 24 hours or more, and then measured under a load corresponding to 0.1 gZd of the sample.
• a sample of length L 0 was left in an oven at 150 ° C for 30 minutes in a tensionless state, then removed from the oven, left in the temperature control room for 4 hours, and measured again with the above load applied.
• L1 was calculated from the following equation.
• a polyethylene terephthalate chip having an intrinsic viscosity (IV) of 1.19 was supplied to an extruder-type melt spinning device, and two yarns were spun at the same time.
• the spinning temperature was 300 ° C.
• the mixture was filtered through a metal filter having a gap of 15 im, and spun through a spinneret having 72 holes.
• the spun yarn was passed through a high-temperature atmosphere at 300 ° C between 35 Omm from the die surface, and then cooled and solidified by blowing cold air at about 20 ° C. After that, apply oil with an oiling roller, take it off with the first godet roller, and press the obtained undrawn yarn between the first godet roller and the second godet roller 1.06 times without winding it. Perform retouching, and then between the second godet roller and the third godet roller. Stretched 70 times and stretched 40 times between the third and fourth godet rollers, and relaxed 1.0% between the fourth and fifth godet rollers. Then, two yarns were wound simultaneously with a winder at a speed of 330 OmZ to obtain a drawn yarn.
• each godet roller The temperature of each godet roller is 70 ° C for the first godet roller, 100 ° C for the second godet roller, 120 ° C for the third godet roller, and ⁇ 40 ° for the fourth godet roller. C, the fifth godet roller was not heated.
• the number of windings of the yarn on each godet roller is three for the first godet roller, three for the second godet roller, four for the third godet roller, and seven for the fourth godet roller.
• the 5th Godet Roller was set to 5 times. For the yarn being wound by the fifth godet roller, a single yarn breakage detecting device was installed, the number of which was counted, and the number of yarn breakages was also evaluated.
• the focusing guide (6) provided in front of the first godet roller (18) shown in Fig. 1 is reciprocated to move the yarn (23) on the godet roller. Traverse was performed in the direction of the rotation axis of the roller.
• the focusing guide was shaped as shown in Fig. 3.
• the yarn width XF was 5. Omm
• the yarn pitch XP between adjacent yarns was 15. Omm
• the value of 2 (XP-XF) was 2 Omm.
• a cam attached to a shaft and connected to the focusing guide is rotated via a shaft by a drive motor, and the focusing guide is rotated by a godet roller along a groove of the cam. It is reciprocated in the axial direction.
• the reciprocating motion cycle was set to 30 seconds by setting the rotational speed of the shaft to 2 rpm using a drive motor and a reduction gear, and the width of the traverse on the take-up roller was set to 16 mm. .
• Table 1 also shows these conditions and the results of evaluation of roller contamination, single yarn breakage, yarn breakage, and dry heat shrinkage of the obtained raw yarn.
• Example 1 by traversing the yarn on the godet roller, the condition of the godet roller surface can be maintained at a low level of dirt until the fourth day. The effect that remarkably few thread breaks were observed was observed.
• Example 1 a device having a structure shown in FIG. 3 was used as a yarn traverse device.
• the position of the focusing guide, the shape of the cam, and the number of rotations of the shaft were the same as in Example 1.
• the stretching assist device was provided between the second godet roller and the third godet roller, and reciprocated in synchronization with the focusing guide. Table 1 also shows these conditions and the results of the evaluation of roller contamination, single yarn breakage, and yarn breakage.
• Example 2 a yarn traverse device having a structure shown in FIG. 4 was used.
• the position of the stretching assist device (5) was set between the second godet roller and the third godet roller in FIG.
• the shape of the cam and the number of rotations of the shaft were the same as in Example 1.
• Table 1 also shows these conditions and the results of evaluating roller contamination, single yarn breakage, and yarn breakage.
• Example 2 the conditions were changed as shown in Table 1.
• Table 1 shows the results obtained. It described in.
• Example 1 Melt spinning of polyethylene terephthalate and rate was performed under the same conditions as in Example 1 except for the conditions shown in Table 1, and the yarn was wound around each godet opening without reciprocating the focusing guide.
• Table 1 also shows the results of evaluation of winding with a winder, roller contamination, single yarn breakage, and yarn breakage. As a result, when the yarn was not traversed on the godet roller, the condition of the roller surface could be kept lightly stained until the second day, but the single yarn breaks sharply on the third day. After that, it became a state where winding could not be performed, and the yarn breakage tended to be extremely poor.
• Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 With or without air guide No Yes y Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No 16 16 0 8
• Thread breaks (times / say) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 1.0 1.0 0.2 0.5 1.4
• the godet roller can be kept in the initial state for a long time.
• high-strength industrial fibers by the high-speed direct spinning and drawing method, it is possible to suppress the deposition of deposits on the godet roller, which is suitable for the industrial high-strength synthetic fiber production process. Available.

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• Physics & Mathematics (AREA)
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• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

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• 2002
  • 2002-02-20 EP EP02700606A patent/EP1279753A4/en not_active Withdrawn
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  • 2002-02-20 CN CNB028013328A patent/CN100445435C/zh not_active Expired - Fee Related
  • 2002-02-20 WO PCT/JP2002/001440 patent/WO2002068735A1/ja active Application Filing
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