JPS59157311A - Melt spinning of synthetic yarn - Google Patents

Abstract

PURPOSE:To prevent overlapping of filaments constituting yarn, to improve extremely quality and grade, by solidifying yarn under cooling, by bringing it into contact with a specific bar of carbon-containing titanium oxide, running it on the bar. CONSTITUTION:The yarn Y extruded from the spinneret 1' of the spinning part 1 is passed through the cooling and solidifying zone I , cooled, the yarn Y running in a range 250mm. from the oiling agent providing zone II, between the solidifying zone I and the oiling agent providing zone II, is made to intersect perpendicularly to the bar 3 of carbon-containing titanium oxide rotating at circumferential speed 2X10<-5>-45X10<-4> the speed of the yarn, set in an opposing way in the oiling agent providing zone, the yarn is run in contact with the bar for 0.5-2.5mm., so that the yarn is provided with the oiling agent uniformly, and quality and grade of the yarn are extremely improved.

Description

[Detailed description of the invention] The present invention relates to a method for spinning synthetic fibers.

Conventionally, the application of oil to melt-spun synthetic fibers is carried out immediately after cooling, but a technique described in Japanese Patent Application Laid-Open No. 57-95306, for example, is known for adding a lubricant to prevent thread C and the like. In the above technology, a voltage of 2 to 15 K is applied to an electrode extending in a direction perpendicular to the yarn running direction on the downstream side of the oil application roll.
A voltage of V is applied to open the synthetic fibers to the electrode.

However, the prior art uses a rod-shaped body made of a conductive metal such as copper, iron, or brass as an electrode,
The electrode is positively charged from a power source,
In particular, because the voltage is high, workers may come into contact with it when threading, switching threads, or cleaning the machine during operation, resulting in shock and contact with the rotating rollers, resulting in a catastrophe. It could be the cause of. Also,
After the synthetic fiber passes near an electrode made of metal such as copper, iron, or brass, the synthetic fiber is given oiling at t+iJ, and after being melt-spun, the synthetic fiber is cooled until the oiling is given. The threading is not constant at the time, and although the synthetic fiber is opened by the electrode, the running path of the synthetic Nam 6 single yarn on the oiling roller is not constant, and due to the opening action The single yarn may separate from the yarn, causing quality problems such as yarn breakage. Furthermore, due to the contact between the metal electrode and the synthetic fibers, the electrodes are worn at the portions where the synthetic fibers come into significant contact, resulting in unevenness on the surface. The four parts of the unevenness may be several microns wide or even as wide as 11 microns, and the depth may be several micrometers, reaching stage 1 after contact for several minutes with copper and brass, and for 8 hours even with iron. In addition, single yarn breakage due to contact between the edge of the convex portion and the running yarn becomes significant, and electrodes must be replaced frequently, and the quality of the bobbin wound with these synthetic fibers is extremely poor. There was something bad.

Therefore, in the prior art, when the electrode and the synthetic fiber are not in contact with each other, some of the single threads may not come into contact with the oiling roller due to anti-moxibustion between the single threads, In this case, there are disadvantages such as single thread breakage due to wear of the electrode, increased electrode monitoring work and electrode replacement work, and a loss of quality of the obtained thread-wound bobbin.

Another major drawback is that when the obtained yarn is wound onto a bobbin, many gray horizontal stripes occur, which significantly reduces the quality and quality and reduces the yield of the product.

An object of the present invention is to provide a method that eliminates the drawbacks of the prior art described above, improves the quality and quality of the obtained thread-wound bobbin, and stably operates the synthetic fiber spinning process.

It is an object of the present invention to provide a space between a cooling solidification area of the yarn and an oil application area, when the yarn spun from a spinneret is cooled and solidified, and then an oil agent is applied thereto. 2 for a ray speed running within the range of 250 rrm from
Xi O'～45×10～"Rotates at twice the surface speed,
A carbon-containing titanium oxide film is provided perpendicularly to the yarn and facing the oil application area across the AiJ yarn.
This is achieved by running in contact at a 5 to 2 degree angle.

The method of the present invention will be explained in detail using the drawings.

FIG. 1 is a schematic front view of a synthetic fiber spinning apparatus according to the present invention. Figure 2 is an enlarged front view of detail a' in Figure 1;
FIG. 3 is a side view of the l+[-Ill' arrow section in FIG. 2.

The yarn Y spun from the spinneret 1' of the spinning section 1 is cooled through the cooling and solidifying zone 1, is coated with an oil agent in the oil agent applying zone (2), and is wound up by the winder 2. The yarn Y is located between the cooling and solidifying zone I and the oil application area (2), and is just before entering the oil application area 1, the oil application area 11, more specifically, the position where the yarn Y contacts the oil application means and the titanium oxide par 5. It is necessary that the opening distance between the opening distance and the position where it contacts is within the range of 25ow1, and it is necessary to make contact with the lubricant applying means, for example, the lubricating roller 4. If the distance exceeds 250 mm, the contact state between the yarn Y and the oil supply roller 4 becomes unstable, and the effect of providing the titanium oxide par 6 is essentially lost. It is also assumed that the titanium oxide bar 6 is rotatable. This rotation speed is 2×101 to 45×10 with respect to the running speed of the yarn Y.
'It is preferable to double the range. In other words, the yarn speed is 1
In the case of 0ΩOm7m1n, the surface speed of the titanium oxide par 5 is within the range of 0.02 m/min to 4.50 m/m''-n, and the contact portion with the yarn Y is in the same direction as the running direction of the yarn Y. If the rotational speed of the titanium oxide spar 5 is slower than 2x+D'' with respect to the running speed of the thread Y, or if the rotation speed is stopped, the thread Y will spread rapidly or separate from the titanium oxide spar 5, causing that part to Since the yarn is separated from the oiling roller 4, there are parts where the yarn cannot be oiled. Furthermore, the titanium oxide perforator 3 is easily damaged by friction with the yarn Y, and single yarns forming the yarn Y are likely to be cut. Contact with the strip Y may not be made smoothly.

The titanium oxide perforator 5 can be easily rotated by connecting the shaft 5 of the oil supply roller 4 with a belt 6, but other rotation means may be used if necessary.

The titanium oxide bar 5 is supported by a support portion 7.7' as shown in FIGS. 2 and 3.
A part of is fixed to the rear panel 8. Support part 7.7
It is preferable to provide a metal plate 9 at a portion of the rotating titanium oxide pad 3 that contacts the supported portion 3'. This is to prevent the support portions 7 and 7' from being worn out due to the rotation of the titanium oxide spar 3 and the contact length between the titanium oxide spar 5 and the yarn Y changing. A range of is good. The wear of the supported portion 3' of the titanium oxide par 5 can also be reduced, and the thread Y and the titanium oxide par 5
It is only necessary to replace the titanium oxide par 6 by removing the part that is in contact with the yarn Y. By rotating the N& titanium par 5 as described above, it can be used for at least 3 months, and depending on the type of yarn Y, it can be used for 8 months to 1 year. When the contact length l between the titanium oxide par 5 and the yarn Y is smaller than 05M, the spread of each single yarn forming the yarn Y is not constant, and it reaches the oil supply roller 4 while overlapping and passes through it, so it is uniform. This is undesirable because the proper amount of oil may not be applied. Moreover, if it exceeds 2 to 5 strokes, the spread of each single yarn may expand too much, and the contact with the surface of the oil supply roller 4 may not be smooth, and some of the single yarns may pass through without contacting the oil supply roller 24. There are times when I do this. Therefore, the contact length 4 is preferably in the range of 0.5 to 2.5 wR.

After the yarn Y is cooled and solidified, it is 2X10-' to 45XiO- within a range of 250M just before reaching the oil application roller.
The overlap of each single yarn forming the yarn Y is determined by rotating the yarn at twice the surface speed and running it in contact with a titanium oxide perforator 6 installed perpendicularly to the yarn for 05 to 2.5 m. The quality of the obtained yarn Y can be significantly improved because the contact with the oil supply roller 4 can be made uniform, and the tapered part of the yarn winding bobbin, which is particularly prone to be caused by uneven application of oil, can be improved. Horizontal stripes can be eliminated to improve the quality, and the physical properties of the yarn Y, such as strength, elongation, and shrinkage characteristics, can be made uniform.

As shown in Fig. 1, the titanium oxide parser 3 is preferably installed in the same direction as the oil supply roller 4 with respect to the running yarn Y. 〈You just have to do the same work as before, and also
Support parts -7, 7 are provided at both ends so that the contact length l does not change.
This is to make it possible to provide .

The titanium oxide par 6 can preferably be obtained by first molding a titanium oxide bar, then impregnating carbon from the outer periphery of the titanium oxide bar, and then grinding and polishing the surface to make it smooth. The carbon content of the titanium oxide par used in the method of the present invention can be adjusted so that the static air charge filter when the titanium oxide par is stationary or rotating is in the range of 02 to 0.5 KV.

Examples and Comparative Examples As a comparative example, a voltage of 3 KV was applied to an electrode made of copper extending in a direction perpendicular to the thread running direction on the downstream side of the oil agent roll, and a running thread (nylon 6 fiber) was applied to the electrode. The fibers were brought into contact and opened.

According to the present invention, after the spun yarn (nylon 6 fiber) is cooled and solidified, the yarn is rotated at a surface speed of +ox+o' relative to the yarn speed at a point 10 to before the position where the oil is applied. The fibers were spread by running in contact with a titanium oxide bar provided in a direction substantially perpendicular to the iU yarn.

That is, the conditions were the same except for the yarn opening method, and the results of these operations are shown in the table.

The horizontal stripes in the table are gray-colored stripes that appear when the thread is wound around a bobbin, and indicate non-uniformity in the length direction of the thread.

N=+00 Rice quality is poor and cannot be used as a product.

In the future, the quality will be foolish and the product will be out of grade.

As shown in the table, the yarn according to the present invention had good quality and quality, and no horizontal stripes were observed on the bobbins, and all the bobbins obtained could be used as products. Furthermore, yarn breakage was reduced by 65 to 78% in the method of the present invention compared to the comparative example.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a synthetic fiber spinning apparatus according to the present invention, and FIG. 2 is an enlarged front view of the I' portion in FIG.
FIG. 5 is a view taken along arrows ``--'' in FIG. 2. 1... Spinning section 6... Carbon-containing titanium oxide par 4... Oil supply roller 5... Shaft 6... Belt 7... Holder 80.・Panel Y... Yarn patent applicant Toshi Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] When applying an oil to the yarn after cooling and solidifying the yarn spun from a spinneret, a range of 250 m from the oil applying area between the cooling and solidifying area of the yarn and the oil applying area. 2X10' to 4 for the running yarn speed
The carbon-containing titanium oxide bar rotates at a surface speed of 5x10' times and is installed perpendicular to the running direction of the yarn.
A method for melt-spinning synthetic fibers, characterized by carrying out contact running with a thread 1 of 2.5 m to 2.5 m.