JPS6253412A - Process for continuous treatment of yarn and apparatus therefor - Google Patents

Abstract

PURPOSE:To enable the uniform treatment of a pair of yarns wound spirally around a pair of rolls, by placing a bar at the yarn-transfer path and contacting the bar with the yarns under specific condition. CONSTITUTION:The continuous wet treatment of a pair of yarns is carried out by winding the yarns spirally in the same direction around a pair of rolls composed of the upper roll 1 and the lower roll 2 and transferring the yarns. A separation bar 12 is placed at the yarn-transfer path directing from the roll 2 to the other roll 1, and the yarns delivered from the roll 2 are separated from each other by contacting with opposite side faces of the separation bar 12. The separated yarns are joined together and passed through the circumference of the other roll 1 keeping the contact state until the combined yarns again reach the separation bar.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for twin-roll continuous yarn processing. More specifically, it describes a two-pair roll continuous yarn processing method and device that improves equipment productivity, swivel productivity, and uniformity of yarn properties, that is, spins a plurality of spun yarns into a pair of yarns at high speed. The yarn is run on a pair of rolls, during which each yarn is subjected to post-treatments such as reaction, scouring and washing (hereinafter collectively referred to as "scouring treatment"), drying treatment, etc., and then winding process etc. The present invention relates to an improvement in a method and apparatus for continuous yarn processing using a pair of O-rings configured to send yarn to the next process.

[Conventional technology]

Various methods and devices for simultaneously processing a plurality of yarns using paired rolls have been proposed.

For example, in the drum-type continuous yarn processing technology proposed in Japanese Patent Publication No. 31-2364 and U.S. Patent No. 2883259, each feed is 91 yarns per roll,
In other words, it is possible to process a number of yarns equivalent to the number of feed rolls, but since multiple feed rolls are each provided at different distances from the processing drum (or rolls), it is possible to process Since the spiral length per roll varies widely, the various scouring and drying processing times also vary widely.

As a result, differences in physical properties such as variations in the degree of scouring occur between each yarn, and when the yarn is used as a product, streaks and streaks occur, making it extremely difficult to withstand industrial implementation. Ta.

In order to solve this drawback, several techniques have been proposed in which a single feed roll is provided and a component for separating a plurality of yarns is provided between the feed roll and a pair of processing drums (or rolls).

For example, US Pat. No. 2,294,871 discloses a technique in which a plurality of separation bars are installed inside the circumscribed tangent of a pair of rolls and a plurality of yarns are run. However, since this technology involves each thread running separately on the roll, the length of the roll must be increased by a multiple of the number of threads run, making it difficult to use the spinning wheel and cut the thread. In order to rotate long rolls at high speed, it is necessary to design the rolls, shafts, and spinning shafts themselves to be extremely strong in order to suppress roll runout, and to improve the manufacturing precision of the rolls. It was not industrially advantageous. If the roll length was kept short, the cost would be to lower the firing speed. Furthermore, due to the difference in the spiral length of each yarn and the difference in the tension applied to each yarn, unevenness occurred in mechanical properties such as strength and elongation, and the yarn and product were not satisfactory.

In JP-A No. 53-49119, the difference in the spiral lengths of both yarns is eliminated by bringing the two yarns into contact with the bar during wet yarn processing using a pair of rolls as described above. However, like the above, this technology also does not allow both yarns to be guided on the same traveling path, and the roll length is required to be twice the normal length, which contributes to reducing equipment costs or increasing spinning speed. It didn't reach that point. Furthermore, in this technique, when the bar is rotated, one of the threads receives a rotational force from the bar in the same direction as the running direction, resulting in a lot of fuzz and cut threads.

Furthermore, in Japanese Patent Application Laid-Open No. 59-204907, although the five problems of guiding multiple yarns to the same traveling path and maintaining the roll length were successfully solved, it was not possible to maintain the tension applied to each yarn constant. However, the low-tension yarn was pulled into the high-tension yarn, resulting in yarn breakage and variations in physical properties. Furthermore,
Because the minute 11fi roll rotates at high speed, if cut threads are generated and wrapped around the separation roll, removal work is dangerous, and work is required to match the rotation speed of the separation roll with the upper and lower rolls. The workability was also unsatisfactory, as the drive gear part had to be dumped into the space.

As described above, none of the conventional techniques has yet been able to simultaneously satisfy equipment productivity, uniformity of physical properties of multiple threads, space productivity, and workability, and which can be implemented with industrial advantage. This is the current situation.

[Problem that the invention seeks to solve]

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional roll-type continuous yarn processing technology, namely, low equipment productivity, low space productivity, non-uniformity of yarn physical properties, and deterioration of workability. The object of the present invention is to provide an improved twin-roll type continuous yarn processing method and apparatus that can be fully implemented industrially.

[Means for solving problems]

The twin-roll type continuous yarn processing method according to the present invention uses a pair of rolls consisting of an upper roll and a lower roll, winds the yarn around the pair of rolls in a spiral shape, arranges the yarn, and arranges a separating bar. A plurality of yarns, each having two or less yarns, are introduced onto the pair of rolls in contact with each other on the same running path, and the yarns running connecting the upper and lower rolls are separated while contacting opposite circumferential surfaces of the separation bar. When traveling on a running path that connects the upper and lower rolls and the upper and lower rolls on the side where the separation bar is not present, the plurality of yarns are again merged onto the same running path and run in contact with each other. This yarn is also characterized in that it travels on a different traveling path than the other yarns.

Further, the twin-roll type compliance yarn processing device of the present invention is a continuous yarn processing device equipped with a twin roll consisting of an upper roll and a bottom roll, in which a plurality of yarns are introduced into the same traveling path on the twin roll. The present invention is characterized in that a plurality of yarn guides are rearranged in the upper and lower rolls, and a separation bar of the yarn running road surface tree that connects the upper and lower rolls is arranged.

The method of the present invention will be specifically explained below.

In the method of the present invention, a plurality of yarns are introduced onto a pair of rolls in contact with each other on the same running path.

"Contact" as used in the method of the present invention refers to a state in which at least some of the single yarns of different threads constituting a plurality of yarns run in contact with each other. The plurality of threads run while being sandwiched by a separation bar placed on the running road surface connecting the upper and lower rolls. Here, to simplify the explanation, a case will first be described in which one separation bar is disposed on one side of the lower roll rotating upward. In this case, the plural yarns are two yarns, and one yarn, after leaving the lower roll of the counter roll, runs toward the outer peripheral surface of the separation bar and comes into contact with the peripheral surface. After that, it runs toward the upper roll. After leaving the lower roll, the other thread runs toward the inner circumferential surface of the separation bar, comes into contact with the circumferential surface, and then runs toward the upper roll. The two yarns separated by the separation bar with their opposite circumferential surfaces abutting each other join together again on the same running path when entering the upper roll, and run in contact with each other. In this case, since there is no separation bar on the running path from the upper roll to the lower roll, the two yarns run in contact with each other on the same running path from the upper roll to the lower roll and are introduced into the lower roll. . Thereafter, while repeating the same separation and merging process, it travels in a helical shape according to a fixed helical pitch, and is subjected to necessary treatments such as scouring and drying.

The yarn that runs in contact with the outer circumferential surface of the separating bar always runs in contact with the outer circumferential surface of the separating bar as long as the separating bar continues to exist, and the yarn that runs in contact with the inner circumferential surface of the separating bar always runs in contact with the outer circumferential surface of the separating bar. always run in contact with the inner circumferential surface, and therefore their running paths are all different and do not intersect on the way.

If there is one more separating bar on the opposite running path, that is, one on each side of the running path connecting the upper and lower rolls, four or three yarns may be run. I can do it.

When going from the lower roll to the upper roll, it is separated and seamed 2
The yarns are separated one by one, and each two yarns are further separated into two by a separation bar as they move from the upper roll to the lower roll. The running paths of the four yarns are all different, and each
The yarn is always divided into yarns that run inside-to-inside, yarns that run outside-inside, yarns that run inside-outside, and threads that run outside-outside against the book separation bar. .

Even if all the yarns run on the same running path, there is no problem in terms of running and processing, but this makes it difficult to separate them when entering the winding process, which has little practical meaning.

The method of the present invention has two major improvements over conventional methods. The first improvement is that by making multiple yarns contact each other on the pair of rolls and take the same running path, the length of the roll is the same as the conventional one required to run one yarn on a pair of rolls. All yarns can be processed with a long roll. Therefore, it is possible to increase the production amount without significantly increasing the design a5R, and it is possible to provide equipment with extremely improved equipment productivity. Further, since the roll length does not change, workability is also good.

The second improvement is that since multiple yarns are run in contact with the opposite circumferential surface of the separation bar, the running path length of all yarns can be made the same, and the necessary processing time can be achieved in the same processing time. can be applied. Furthermore, since the threads run symmetrically with respect to the separation bar, the tension exerted by the separation bar is also the same. Therefore, the physical properties of the yarn are approximately the same between the yarns, and the unevenness of the product can be kept to an extremely small level.

The ability to simultaneously satisfy the above two points is the greatest advantage of the method of the present invention.

The method of the present invention can be used to treat continuous yarns such as viscose rayon, copper ammonia rayon, acrylonitrile polymer yarn, and wholly aromatic polyamide yarn.

In the method of the present invention, it is more preferable to use a separating bar that is fixed so as not to rotate. When the separation bar is rotated, the thread running in the opposite direction to the rotation direction is subjected to extra tension, which tends to increase fuzz and cut threads, and also causes the thread to wrap around the separation bar. Disadvantages are likely to occur, such as a reduction in the safety of the work when removing this, and additional expenses such as the cost of installing a driving pour section.

Circumscribed circle diameter d (III) and yarn running speed V (m7 minutes)
It is further preferable to use a separation bar having the following relationship. As a result of extensive research, the present inventors have discovered that the diameter of the circumscribed circle of the separation bar has an important meaning in the method of the present invention. In other words, defects tend to increase if the separation bar is too large or too thin, and it is better to use a thinner separation bar when running at high speeds than when running at low speeds, improving the running stability and quality of the yarn. The stone is said to improve your strength. Separation bar! If it is made too thick, the contact area will increase too much when the yarn and separation bar come into contact with each other, resulting in excessive tension on the yarn, which will easily damage the entire yarn and lead to an increase in fluff. This tends to result in cutting too much, resulting in insufficient processing time. Also, if the separation is made thinner than 2m11,
The separation angle between multiple yarns separated by the separation/mer becomes small, and the liquid adhering to the yarns forms a liquid film between the yarns to be separated, and the surface tension of the liquid film causes the yarns to separate. The threads are likely to be pulled together and break. As the speed increases, the tension when the yarn contacts the separation bar increases.
The upper value of the diameter d of the separation bar becomes more stable if it is shifted to a smaller value.

In the method of the present invention, any method may be used to discharge the spinning dope from the spinneret, or it may be applied to the case where a new treatment is applied to the scoured and dried yarn again. . There are no limitations on the winding method, and any method may be used.

The spinning denier and the number of single yarns are also not particularly limited. Particularly when processing thick denier yarns, an appropriate material should be selected from the viewpoint of the strength of the separation bar.

Furthermore, the method of the present invention is designed to control the thread running speed, and there will be no problem if the diameter of the separation bar is selected according to the speed. In the spinning of viscose rayon, the present inventors have discovered that d=
60 separation bars are run stably at a processing speed of 700 m/min, and high quality yarn is obtained.

Next, the apparatus of the present invention used to carry out the method of the present invention will be explained.

In the apparatus of the present invention, a plurality of yarn guides are arranged so that a plurality of yarns are introduced into the same traveling path on the pair of rolls. In a twin-roll type continuous yarn device, the helical pitch is determined by the inclination of the axes of the upper and lower rolls, and the yarn introduced at the same position runs on the same traveling path and can be pulled out from the same position. The length of the roll used to process the yarn may be the same as the length of the roll used to process the single yarn. The separation bar is arranged so that each of the plurality of yarns comes into contact with a yarn running road surface connecting the upper and lower rolls, and at least two yarns come into contact with opposite peripheral surfaces.

With such an arrangement, each of the plurality of threads can have the same running path length and the same contact length with the separation bar, and can take different running paths.

It is preferable that the separation bar be fixed rather than not rotated, and that the diameter d of the circumscribed circle of the separation bar satisfies 2<d<4800. The reasons are the same as those described in the explanation of the method of the present invention.

It is more preferable to provide the gold-white separation bar only on one side of the lower roll that rotates upward. In this case, gravity acts on the liquid film formed between the two yarns under the separation bar and inhibits the growth of the liquid film, making it possible to reduce the surface tension that draws the two yarns together. , the occurrence of thread breakage is reduced.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing the continuous yarn processing method and apparatus of the present invention, and is an example in which one separation bar 13 is used to run two yarns. Figure 2 (4) is the first
This is a sectional view taken perpendicular to the roll axis as seen from the spinning side of the figure, and the separation bar 13 is disposed on one side of the lower roll rotating upward. 2) is a sectional view when the separation bar 13 is arranged on one side of the upper roll rotating downward.

For example, the threads 12 and 12' are connected to the stock solution supply pipes 10 and 1.
0', the yarn is spun from the spinnerets 9 and 9', and the yarn is introduced at the yarn introduction position 16 on the pair of rolls at the yarn guides 11 and 11'.
guided by. The two threads 12 and 12' are the upper opening loop 1.
We meet up at the top and head towards the bottom roll 2.

The two threads 12 and 12' separate at position 18 on the bottom roll 2, one of which separates against a separation bar 13 located in the plane 15 on which the bottom roll 2 rotates upwards. While one side is in contact with the inner peripheral surface of the bar 13 and the other side is in contact with the outer peripheral surface, they pass through opposite peripheral surfaces and merge at a merging point 19 on the upper roll 1 to contact or approach the upper roll 1.
The vehicle then moves forward in a helical manner, repeating the same process at a fixed helical pitch 17. Thread 12
and 12', after passing through the scouring processing section 6, the drying processing section 7
and 8, leave the rolls at roll exits 20 and 20', and head to the next process such as a winding process.

As shown in FIG. 2 and FIG.
Two threads are arranged on either side of the thread running path connecting the two threads so as to contact the opposite circumferential surface.

FIG. 3 shows the arrangement of the separation bars and the running path of each yarn when the four yarns 12112', 12#12'' are made to run using the two separation bars 13 and 13'. (The yarn on the roll is omitted in the figure.) The yarn 12 runs inside the separation bar 13 and the separation bar 13', and the yarn 12' runs between the outside of the separation bar 13 and the separation bar 13'. The yarn 12 runs inside the separation bar 13 and the outside of the separation bar 13'.
The threads run on the outside of the separation bar 13' and on the outside of the separation bar 13', and each yarn has the same running path length and takes different running paths.

[¥Example]

A more detailed explanation will be given below with reference to Examples.

Example 1 Using the continuous yarn processing method and apparatus of the present invention, viscose rayon, lJ yarn treatment JIL&.

The apparatus used corresponds to that shown in FIG. 3, and the upper and lower rolls had a diameter of 150 fins, and two separation bars with a diameter of 25 m were fixed so as not to rotate. The helical pitch was 7 m, and four yarns of 250 denier/5+::/filament were processed at a spinning speed of 180 m/min and a yarn running speed. The four yarns run on the rolls on a traveling path similar to that shown in Fig. 3 while repeating separation and merging by coming into contact with two separation bars, during which time 0.05.
It was washed with a P/l aqueous solution for 20 seconds and then washed for 10 seconds and dried, and after coming out of the roll, it was wound up with a winding machine.

The physical properties of the obtained yarn, the cutting rate during spinning, and the number of fluffs were
Shown in the table. Yarns 1 to 4 in the table are yarns 12 to 4 in Fig. 3, respectively.
12///.

The following margin evaluation method = (1) Dry strength, dry elongation...The average value of n = 5 points was shown using a Schottuber type serimeter (manufactured by Asano Seisakusho). (2) Dyeing difference: After tube-knitting and dyeing the yarn, the color difference was visually measured based on the color difference of the JIS L/0804 gray scale for discoloration and fading. Note that yarn 1 was used as the reference yarn. The color difference of the JIS L O804 gray scale for discoloration and fading is the Adams-Nitzkerson color difference formula (NBS
unit), so the unit of staining difference is ΔN
Displayed as BS. (3)...Whiteness is JIS L 1
013.

As is clear from Table 1, the physical properties of yarns 1 to 4 were all the same, and the level of fluff cut yarns also showed good values.

Examples 2 to 21 A 150 denier/4074 lament was processed by varying the diameter of the separation bar and yarn running speed as shown in Table 2. Other conditions were exactly the same as in Example 1. In addition to thread cutting rate and number of fuzz, whiteness was evaluated to see if the processing time was sufficient. The value of whiteness was represented by yarn 1 corresponding to yarn 12 in FIG. 2, and the whiteness of yarns 2 to 4 was approximately equivalent to yarn 1. The results are shown in Table 2.

As is clear from Table 2 below, the technique of the present invention can be applied satisfactorily under various conditions. As the diameter of the separation grooves became thicker, the whiteness decreased slightly, and the number of cut threads and fuzz also tended to increase, and as the diameter of the separation grooves became thinner, the number of cut threads tended to increase.

Comparative Example 1 Using a device corresponding to Figure 3, the helical pitch was set to 14 m.
and set one of the thread guides of the two threads to 71 from the other.
The yarn was spun in the same manner as in Example 1, except that the yarn was placed at the back of 111 so that the two yarns would not merge.
An extremely yellow colored yarn was obtained which was clearly under-regenerated.

Comparative Example 2 Four yarns were processed using a drum coupling device equipped with four feed rolls. The device used is Japanese Patent Application Laid-Open No. 53-4911.
This device corresponds to the device described in Figure 1 of Publication No. 9, and the diameter of the drum is 500 cm, the diameter of the feed roll is 100 m, and the suspension length of the thread running from the drum to each feed roll is 26 ca 140 cWL sequentially from the lower feed roll. 52.5cm,
It was 65m. A yarn was obtained in the same manner as in Example 1 except that this device was used. The results are shown in Table 3.

Table 3 As is clear from Table 3, in this example, the suspension lengths of yarns 1 to 4 were different, resulting in a difference in residence time in the treatment section, so it was not possible to eliminate the difference in physical properties.

Comparative Examples 3 to 5 Two yarns were treated with one separation roll using the same apparatus as in Example 1 described in JP-A-59-204907. A separation roll rotating at a diameter of 50 m was used, and a 300 denier 150 filament was spun at 130 m/min at a helical pitch of 7 cm for thread treatment. The yarn that comes into direct contact with the separation roll is referred to as yarn 1, and the yarn that does not come into direct contact with the separation roll is referred to as yarn 2. The tension at the time of entering the roll was varied to evaluate strength and elongation and thread cut rate. The results are shown in Table 4.

As is clear from Table 4 in the margin below, if the roll input tension of yarns 1 and 2 is the same, the physical properties can be made almost the same, but when yarn 1 is taken by yarn 2, the cut yarn is It occurs frequently. If the tension of yarn 1 is set higher than that of yarn 2, the number of cut threads can be reduced, but the physical properties become uneven, and both the physical properties and the thread cut rate cannot be satisfied.

Example 22 The four yarns obtained in Example 1 were wound up and subjected to bleaching and drying treatment again using the apparatus used in Example 1. Bleach is H2
An aqueous solution of 0□0.05 was used. Table 5 shows the whiteness of the obtained yarn.

Table 5 As is clear from Table 5, yarns 1 to 4 all showed the same degree of whiteness and no difference occurred.

〔Effect of the invention〕

As can be seen from the above Examples and Comparative Examples, according to the present invention, there is almost no difference in physical properties between the plurality of yarns, and
Continuous yarn processing can be performed up to a high spinning speed range while maintaining an extremely low and stable thread cut rate and fuzz count. Nato,
As the separating bar diameter α increases, the fuzz tends to increase, and as α decreases, the thread cut rate tends to increase. Therefore, by selecting an appropriate surface diameter according to the yarn running speed, , the effects of the present invention can be enhanced.

On the other hand, when the conditions shown in the comparative example are used, the physical properties are maintained at a high level and the differences between the yarns are eliminated, as well as fluff and
Unable to stabilize the cut thread. This also shows that the present invention has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the continuous yarn processing method and apparatus of the present invention, and is an example in which two yarns are run using one separation bar. FIGS. 2A and 2B are cross-sectional views taken perpendicular to the roll axis of the present invention. FIG. 3 is a sectional view showing a mode in which four yarns are run using two separation bars of the present invention. ■...Top roll against the roll, 2...Bottom roll against the roll, 3...Arrow indicating the rotation direction of the top roll, 4...
・Rotation direction of the lower roll Arrow shown above, 5...Scouring liquid supply nozzle, 6...Scouring processing section, 7 and 8...Drying device, 9 and 9'...Spinneret, 10 and 10' ...Stock solution supply pipe, 11 and 11'... Yarn guide, 12 and 12', 12'. 12///... Yarn, 13 and 13'... Separation bar, 14 and 14'... One side of the running path connecting the upper and lower rolls.

Claims (1)

[Claims] 1. A method of continuously processing the yarn by winding the yarn around the pair of rolls in a helical manner and advancing the yarn using a pair of rolls consisting of an upper roll and a lower roll. At least one separation bar is arranged on the running surface of the yarn to tie, and multiple yarns of up to two per separation bar are introduced onto the pair of rolls in contact with each other on the same running path, and the upper and lower The yarn connecting the rolls is sandwiched between separation bars arranged on the running road surface, and all of the plurality of yarns are in contact with the separation bar and at least two
When the books are separated and take different running paths while contacting the opposite circumferential surfaces of the separation bar, and when running on the running path that connects the circumference of the upper and lower rolls and the upper and lower rolls on the side where the separation bar does not exist, there are multiple books again. A continuous yarn processing method characterized in that the yarns are made to run on the same traveling path while being in contact with each other, and each yarn is made to travel on a traveling path that is different from other yarns. 2. The continuous yarn processing method according to claim 1, which uses a separation bar fixed so as not to rotate. 3. Circumscribed circle diameter d (mm) and thread running speed V (m/min)
Claim 1 using a separation bar having the relationship of 2≦d≦4800/V
The continuous yarn processing method according to item 1 or 2. 4. In a continuous yarn processing device equipped with a pair of rolls consisting of an upper roll and a lower roll, a plurality of yarn guides are arranged so as to introduce a plurality of yarns into the same traveling path on the pair of rolls, and the upper and lower rolls A continuous yarn characterized in that at least one separation bar is arranged so that each of the plurality of yarns comes into contact with the running surface and at least two yarns come into contact with the opposite circumferential surface. Row processing equipment. 5. The continuous yarn processing device according to claim 4, wherein the separation bar is fixed so as not to rotate. 6. Circumscribed circle diameter d (mm) and yarn running speed V (m/min)
The continuous yarn processing device according to claim 4 or 5, characterized in that the separation bar has a relationship of 2≦d≦4800/V. 7. The continuous yarn processing device according to any one of claims 4 to 6, wherein the separation bar is provided on one side of the lower roll rotating upward.