JPS6015729B2 - Manufacturing method of spun yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When obtaining yarn from short fiber materials such as ring spun yarn, the present invention is capable of producing soft spun yarn with sufficient practical performance and good spinnability due to the soft twist that could not produce the following characteristics. This invention relates to a highly efficient manufacturing method.

Various methods have been invented and put into practical use by arranging relatively short stable fibers such as cotton and wool in a certain direction and twisting them to form yarn. It provides clothing essential to human life and helps form the foundation of a rich cultural life.

Among them, the ring kasu spinning machine was superior to any conventional kasu loom in terms of its compactness, ease of operation, and quality of yarn obtained. It has become so popular that it refers to beach looms.

However, as time passed, its low productivity became a problem, and although various improvements have been made since then, in order to achieve the desired performance as a yarn with only real twisting, Although it is necessary to apply a high number of twists, the fatal disadvantage that high speed cannot be achieved because the number of twists is provided by the rotation of the winding package has not been solved.
In response to this, an open-end spinning method has been developed in recent years, and a new idea has made it possible to significantly increase the speed of the spinning process that used to involve ring twisting. 40 for structure
The range is limited to comparatively thick yarn counts below 'S, and in the finer yarn count field, low-speed ring fine looms still dominate.

In addition, the binding spinning method that applies false twisting makes it possible to dramatically increase the speed, and there are few restrictions on the yarn count to be manufactured. In addition to constraints on manufacturing conditions such as the need to use staple fibers with extremely long cut lengths, there is also the disadvantage that the fabric obtained due to non-twisting is stiff and stiff, so the bundling method is still not widely used. not yet reached the stage.

In order to compensate for the shortcomings of the binding spinning method, a method has been proposed in which the binding effect is imparted to the yarn by temporary combustion, and then the yarn is continuously burned in a twisting machine. Since it is necessary to use a machine, the spinning speed is controlled by the speed of the ring twisting machine, and it is not possible to increase the spinning speed. Normally, in the binding spinning method, it is necessary for the fibers supplied to the rotating nozzle to spread beyond a certain level, but the effect of the air flow caused by the rotation of the front roller, which is the final roller of the drafting device, is important. The action of the airflow around the rollers at a certain speed or higher is necessary for the expansion of the fibers, and when used in conjunction with the ring twisting machine as described above, the action of the airflow around the rollers at a certain speed or higher is necessary. Because the rotation of the controller roller is restricted, the inside of the fibers fed to the nozzle does not spread sufficiently to produce a binding effect, resulting in poor binding.As a result, the paper extension force during twisting by the ring yarn machine, or the traveler The yarn cannot withstand the friction of contact with the yarn and breaks, making it impossible to spin. In view of these circumstances, the present inventors have made efforts to solve these problems with conventional spinning methods, and have created a highly practical book that can be applied to natural fibers with relatively short fiber lengths such as cotton and wool. invention has been achieved.

That is, in the present invention, the fibers are drafted, and then false twisted with zero force and scale twist using a swirling fluid flow at a spinning speed of 8 min or more, wound up into a package, and then twisted with a twist index of la. A method for producing a spun yarn characterized by winding the final twist in the same direction as the untwisting direction of the false twist, and turning the drawn fibers together with at least one filament yarn or processed yarn. By using fluid flow, heating and false twisting of scales can be done by 8 times.
The material is applied at an edge speed equal to or higher than 100 min, is once wound into a package, and is then wound up while adding a real twist with a twist index of 1 in the same direction as the natural twist of the false twist. This is a method for producing spun yarn. However, the twisting index refers to Nostable's average fiber length (ribs) x fuel coefficient (English formula).

The yarn bound by the method of the present invention has a structure in which short fibers are wrapped around the real twist Shuto fiber east, either singly or as multiple fibers, and has sufficient practical performance for handling in subsequent processes. Because the fabric is soft and gently twisted, the resulting fabric is bulky, soft to the touch, and has excellent quality without wobbling.

The present invention will be described in detail below with reference to the drawings, but the drawings are for illustration only, and the invention is not limited thereto, and modifications may be freely made without departing from the spirit of the invention.

FIG. 1 is a schematic side view of a manufacturing apparatus suitable for carrying out the present invention.

The fibers, for example rovings 2 of short fiber staples, are extracted from a suitably shaped package 1 by a conventional drafting device A including a back roller 3, an apron device 4, and a front roller 5.
The fibers are drafted to a predetermined thickness and are continuously drawn out from the front roller 5 as substantially parallel fibers.

On this front roller 5, the drafted fibers and filament yarn or processed yarn may be superimposed as shown in FIG. 5 to form a core yarn type spun yarn, or as shown in FIG. It may also be used as a composite yarn type spun yarn by spreading and supplying the fibers by electrical means or the like. According to the method shown in FIG. 5, a so-called core yarn type spun yarn is obtained in which a filament yarn or processed yarn is arranged around the core and stable fibers are wound around it. Here, 18 is a package of filament yarn or processed yarn, 19 is filament yarn or processed yarn, Futagawa feed roller 21 is a guide, Y is a bundled yarn, and 9' is a package. Also, the 6th
The figure shows an apparatus for producing a composite yarn type spun yarn, which yields a yarn in which stable fibers and filaments are mixed together.・Here, Y'' is a bundled yarn, 9'' is a package, and 22 is an opening device such as an electric means. When the drafted fiber east passes through the nip line of the front roller 5, it passes through the nozzle 6 located immediately after the front roller 5.
After being suctioned and turned into a temporarily twisted form, it is decombusted and given a forward propulsion force to become a bundled yarn Y. After passing through a delivery roller 8, it is transferred to a winding roller 7 to form a one-day package 9. It is wound up.

Thereafter, the package 9 is supplied to a ring twisting machine B having a delivery roller 11 and a twisting device, and is applied with actual combustion under a twisting index of 1 in the same direction as the twisting direction of the nozzle 6. The finished thread 13 is passed through the thread and wound onto the bobbin 14. Here, the raw materials for Fiber East supplied to the draft device A are as follows. Examples include natural fibers, synthetic fibers, recycled fibers, semi-synthetic fibers, etc. alone or a mixture thereof, and there is no restriction on any fiber material used for clothing as long as it has a finite length. As the raw materials for filament yarns used in combination with these short fibers, those used for clothing, such as polyester, nylon, and acetate, can generally be used. The form of the short fiber East 2 when supplied to the drafting device A is one that can be drafted by the difference in surface speed of at least two sets of nip rollers, such as a thick untwisted sliver or a thin roving with weak twist. Good to have. However, it goes without saying that the configuration of the draft device should be selected appropriately depending on various factors such as the type of material to be supplied, the length of the cut, and the thickness at the time of supply. In addition, an appropriate guide or collector is provided to slightly bend the flow of the fiber east while being drafted between the draft rollers, and the thickness distribution in the middle direction of the fiber east at the nip line of the front roller 5 is adjusted to form a fiber bundle as shown in Figure 2. supplying it to a nozzle 6 provided immediately after the front roller 5 asymmetrically with respect to the central axis C in the center;
In particular, the surface speed of the front roller 5 is at least 80 m.
/min, and causing the accompanying air flow at the periphery to act on the fiber east just before the nip line increases the bundling effect of the outer peripheral fibers through the false twisting effect caused by the swirling fluid flow, resulting in particularly favorable workability and yarn quality. Here, in order to effectively implement the present invention, the surface speed of the front roller 5 is 8 h/h.
Must be greater than or equal to min.

Since the ends of the short fibers are wrapped around the fiber east and bundled, a part of the short fibers on at least one side of the fiber east, which is supplied to the swirling flow nozzle, is freed from the restraint of the fiber east group. However, in order to obtain a large number of such short fiber ends, it is necessary not only to mechanically spread the inside of the V-supply fiber east, but also to spread the accompanying airflow near the surface of the front roller 5. It is necessary to have a fiber-opening action that spreads the short fibers on the east side further outward, and the front roller 5 must rotate at a surface speed of 8 h/min or more. This restriction on the surface speed of the front roller 5 becomes larger and more strictly required as the fiber length of the short fiber east becomes shorter.
4. There is a tendency for the length to become longer and to be relaxed, but in no case should it be less than 8 h'min.

As for the nozzle 6, the yarn entrance part has a fan-shaped expansion for concentrating the drawn fibers, and a cylindrical shape or a cylindrical shape with an appropriate thickness is connected to a narrowed part corresponding to the main part of the nozzle 6. It is sufficient that the fluid injection holes are eccentrically connected to the yarn path of the shape and that the exhaust is primarily carried out in the same direction as the yarn travels.

However, as shown in FIGS. 3 and 4, a narrow constriction part 16 for constricting the yarn route is provided in the upstream part of the yarn passage 17 close to the fluid injection hole 15, and the constriction part 16 is connected to the fluid injection hole 15.
It is preferable that the shaft is eccentric toward the opposite surface that connects to the yarn passage 17, since it has particularly excellent turning force and stability.

The delivery roller 8 is slightly far away from the front roller 5 to keep the bundled yarn 7 subjected to the false twisting action by the rotating nozzle 6 in a relaxed state where it is easily burned.

Here, the overfeed rate between the front roller 5 and the delivery roller 8 (the circumferential speeds of the front roller and the delivery roller are VF and VD, respectively) is
If the value (expressed as a percentage) is too small, the twisting force of the nozzle 6 will be reduced, hindering the binding effect and causing thread breakage; if it is too large, the thread will become slack, causing snarls or balloon breaks. I don't like either of those things. Therefore, it is desirable to suppress this overfeed rate to about 0.5 to 3%. After the fiber is subjected to false twisting by swirling flow to form a filament at a spinning speed of at least 8 h/min, it is wound into a package and then subjected to real twisting in the same direction as the untwisting direction. Not only is it highly durable, but it also improves the quality of the yarn, especially the resistance to straining when the yarn is rubbed, compared to a simple bundled spun yarn in which the fibers are intertwined with each other. It is essential to increase dramatically.

Further, as described above, the direction of twisting by the ring twisting machine in the next step must always be the same as the direction of untwisting by the nozzle 6. If actual twist is applied in the opposite direction, not only will the bundled fiber structure be destroyed by the swirling flow, making it impossible to obtain a normal yarn, but also yarn breakage will occur, making spinning impossible. Here, the number of twists is determined by the east average fiber length of the fiber that can be spun ("JISIO I9").

) is determined by the twist coefficient (English style) specified under the twist index 12. Table 1 shows the experimental results using the device shown in Figure 1, including the relationship between the actual twist and the twisting direction of the swirling airflow, and the influence of the twist coefficient on the physical properties of yarn and fabric. , shown in Table 2. If the direction of additional twisting is the same as the direction of false twisting of the air nozzle, the yarn cannot be graded due to yarn breakage. Only when the spinning method is limited to less than one male, soft and bulky fabrics, which could not be produced by conventional spinning methods, can be obtained. Moreover, this firing number was preferable from the viewpoint of increasing the paper delivery speed and yarn productivity. Here, the twisting index refers to the average fiber length (fence) x twisting coefficient (Aoi formula) of the stable fiber, and as seen in Tables 1 and 2, this value is less than 1.
Table Effects of twisting (1) Spinning speed of bundled yarn 150 m/min, average fiber length 35, yarn count 36
'S spindle rotation speed of the spinning machine...8000 r/m (
however*,. ．． 6000 rnom, **...Reference value (without twisting) Table 2 Kason effect ■Raw material 100% wool, average fiber length 82, yarn count 24 (metric), spinning speed of bundled yarn 135 m Spindle rotation speed of Imin Sun thread machine...
・8000rpm (However *...6000rpm, **
...Reference value (without twisting) Average fiber length: 35 skin polyester, twist coefficient when blended with stable fiber (65%) and wire (35%) is 2.03 or less, 100% wool, average fiber length In addition to the twist coefficient of 1.33 or less for cotton fibers with an average fiber length of 28, the twist coefficient is 2.27 or less for cotton fibers with an average fiber length of 28.
When made of polyester with a length of 63 and 100% staple fiber, the fuel coefficient is 1.51 or less.

When spinning these fibers, conventional ring spinning requires 3.5, 2.7, 4, and 2, respectively. Giving a twist coefficient (Aoi method) of Natsuya degree was required in order to withstand the tension during spinning and wind up the yarn, and to obtain a practically usable yarn quality. As in the method of the invention, the fibers fed from the front roller 5 at a speed of more than h'min are once collected in a swirling flow, wound into a package, and then twisted, resulting in extremely small fibers as shown in the above values. This makes it possible to form threads with different twist coefficients.

It is possible to produce paper even with a twist coefficient higher than this, but in this case the yarn becomes thin, hard, and brittle, and the difference from the subordinate yarn is small. It becomes difficult to find the characteristics that were used to obtain a beautiful Futake. In this case, productivity also decreases. Therefore, the characteristics of the yarn targeted by the present invention are emphasized as the twist coefficient is within the range below these and is smaller, but if it is too small, it becomes difficult to form the yarn during tight twisting, so the usual twist index is 6. ~10
is the most preferred range. However, as mentioned above, if the binding effect of the fiber east is increased by making the thickness distribution of the fiber east asymmetric in the front nip line or by using a special nozzle with an eccentric constriction part, the twist coefficient of the ring twisted yarn can be further increased. , can be reduced. On the other hand, when lowering the pressure of fluid supplied to the nozzle, such as air, to weaken the twisting effect and reduce air consumption to weaken the binding, it is necessary to slightly increase the twisting effect during burning. They may be combined as appropriate, taking into consideration various factors such as purpose, effect, and economic efficiency. As a means for twisting yarn, although a ring twister has been mainly used as an example, it goes without saying that other devices such as an up twister and a double twister can also be used.

Although the method of the present invention is suitable for producing spun yarn using 100% stable raw material, it is also suitable for producing core yarn using filament or processed yarn as a core yarn and covering short fibers around it, or for supplying filament or processed yarn. Similar effects can also be achieved in the production of composite yarns that are weaved and tied together using high-voltage electrodes or other suitable means.

In this way, the method of the present invention is practical in that it can overcome not only the drawbacks of the bundled spinning method but also the drawbacks of the ring spinning method by combining the bundling by wrapping and length of short fibers using swirling flow and the mulberry threading by actual twisting. This is a paper recording method.

Example 1 Table 3 shows the yarn properties of the spun yarn according to the present invention, which was printed out under the following conditions using the apparatus shown in FIG.

Spinning conditions: Short fibers: line (average fiber length: 3 m) Nozzle air pressure: 4k9/Sakai G Spinning count: 50'S Weaving speed: 138h/min Ring twisting machine Spindle rotation speed: 800 m/m Third table Entanglement performance measurement: Number of times the sample is squeezed until the first one out of 10 samples is cut using an embedding force tester (manufactured by Maeda Seisakusho) Sample 1 true load
As is clear from Table 3, a spun yarn with sufficient yarn properties was obtained with approximately 50% of the burn rate of the conventional ring spun yarn.

Once the binding thread is manufactured in this way, the binding thread has a small amount,
By increasing the number of twists, it has become possible to produce foot-sweet twisted yarn with excellent bulkiness, which has not been possible until now. Example 2 Using the apparatus shown in FIG. 5, a core yarn type bundled spun yarn was produced under the following conditions.

Conditions Short fiber...Cotton (average fiber length 3 meters) Filament yarn...Polyester multifilament yarn (
(30 denier 18 filament) Nozzle type...as shown in Figures 3 and 4.

Nozzle air pressure: 4k9/sug Paper delivery speed: 13 winds/min Grade delivery count: 39g/1'S The obtained spun yarn was 1M/min with a double twister (not shown).
In actual twist was added in the same direction as the decombustion direction (burning number 1
'in' corresponds to a twisting index of 10.5.

). Incidentally, the spindle rotation speed of the ring twisting machine for weighting was 800 m/m. The yarn quality of the obtained core yarn type spun yarn was examined and shown in Table 4. In addition, polyester multifilament yarn (30 denier 18 filaments) is spread through the opening device 22 shown in FIG. 6 (voltage 3000 Vol.
Polyester multifilament yarn (30 denier 1
A core yarn type spun yarn was produced by inserting 8 filaments) into the core, and the yarn quality is also shown. Table 4 As is clear from this table, M. Although items 1 and 2 have a low twist index and are lightly twisted, their entanglement performance is equivalent to that of conventional ring-based core yarn (shame 3, actual twist only), and the texture of the yarn is also improved. It was also soft.

In addition, the gunwale. The twisting index of 3 is obtained by converting the actual number of twists by a ring into a twisting index as in the conventional method.

[Brief explanation of the drawing]

The figures relate to the present invention; FIG. 1 is a schematic side view of a manufacturing apparatus suitable for carrying out the present invention, FIG. 2 is a graph showing the thickness distribution in the middle direction of the fiber east, and FIG. A cross-sectional view of the nozzle 6,
Figure 4 is a sectional view taken along line W-W in Figure 3,
The figure is a schematic side view of a manufacturing apparatus showing another embodiment, and FIG. 6 is a schematic side view of a manufacturing apparatus showing still another embodiment. 5... Front roller, 6... Nozzle, 8... Delivery roller, 17... Yarn passage. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. Drafting a fiber bundle, then twisting it by a swirling fluid flow,
False twisting of untwisting is performed at a spinning speed of 80 m/min or more and winding is performed once into a package, and then real twist with a twisting index of 12 or less is added in the same direction as the untwisting direction of the false twisting and winding. A method for producing spun yarn characterized by: However, the twist index is √(average fiber length of stable (mm
)) x twist coefficient (English formula). 2. A drafted fiber bundle together with at least one filament yarn or processed yarn is subjected to false twisting and untwisting using a swirling fluid flow at a spinning speed of 80 m/min or more, and once wound into a package cage; A method for producing a spun yarn, which comprises winding the yarn while adding actual twist with a twist index of 12 or less in the same direction as the untwisting direction of the false twist. However, the twist index is √(average fiber length of stable (
mm)) x twist coefficient (English formula). 3. Claim 2, characterized in that at least one filament yarn or processed yarn is supplied after being opened.
The method for producing the spun yarn described in Section 1.