JPS5939529B2 - Manufacturing method of spun yarn-like yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a spun yarn kite yarn, which includes a continuous multifilament yarn as a component and has a large number of loops protruding from a yarn body.

The present inventor has hitherto proposed a method for producing spun yarn kite yarn using continuous multifilament yarn as a component, which consists of a continuous multifilament yarn that is substantially untwisted in the heated region of the core yarn that runs while being heated. A method was proposed in Japanese Patent Application No. 131158/1983, etc., in which the twisted yarn is actively fed and entangled at a speed at least faster than the withdrawal speed of the core yarn, and then untwisted.

The present inventor has discovered that by using these methods, the loops of the twisted yarn are tightly entangled around the core yarn and then wound back, making it possible to manufacture spun yarn kite yarn that is easy to handle in subsequent processes such as weaving, knitting, and weaving. And so.

However, when using these methods to supply a fixed length of core yarn using a feed roller, the tension is extremely high and unstable due to twisting and shrinkage due to heating of the core yarn, and the feed rate (ratio of feeding speed to withdrawal speed) is extremely high and unstable. For example, if the circumferential speed of the feed roller is v1 and the circumferential speed of the delivery roller is v2, the feed rate F is F=(V.

−V2) x 100 /V, expressed in yen.

), the appropriate range was narrowly limited, and stable operating conditions were difficult to find.

On the other hand, if the core yarn is supplied with a constant tension using a gate tensor and a tension washer, fluctuations in tension can be kept to a minimum and stable processing becomes possible.
The supply yarn length of the core yarn changes due to fluctuations in the unwinding tension of the core yarn, and it is extremely difficult to maintain the same tension for multiple spindles over a long period of time, and in severe cases, the denier of the processed yarn also changes. This also caused problems.

Furthermore, these spun yarn kite yarns have a raw filament yarn as a core yarn (a filament yarn obtained by a spinning-drawing process, etc., which has not been subjected to texture processing such as false twisting or pressing), and is referred to as a modified filament yarn below. When using woven fabrics, the apparent bulkiness is almost satisfied with the looped yarn due to the yarn form, but there is a problem that the texture becomes stiff and the actual bulkiness is low when made into a fabric. Ta.

On the other hand, if a spun yarn, crimped yarn, or the like is used as the core yarn, a spun yarn kite yarn with high bulkiness and flexibility can be obtained, but there is a problem in that the cost becomes extremely high.

Therefore, the present inventor has arrived at the present invention as a result of intensive studies on these various problems.

In order to achieve the above object, the present invention has the following configuration.

That is, in the present invention, when a multifilament yarn of thermoplastic fiber is heated, untwisted, and drawn out without being run,
Supplying a substantially untwisted multifilament yarn together with a fluid to the multifilament yarn of the thermoplastic fiber in the heating zone while actively opening the yarn at a speed that is four times or more than the drawing speed;
The present invention is characterized in that the heating state of the multifilament yarn of the thermoplastic fibers is set by heat at the upstream side of the entanglement point.

Next, the present invention will be explained in more detail with reference to the drawings.

Figure 1 shows a cylindrical chamber for introducing a continuous multifilament yarn as a spindle along with a fluid in a tangential direction to a yarn path in a cylindrical chamber, and a direction opposite to the swirling flow in the yarn path in the cylindrical chamber. An example is shown in which processing is performed using a device in which fluid heating elements that generate a swirling flow are arranged in order along the traveling direction of the running core yarn.

In FIG. 1, a continuous multifilament yarn 2 taken out of a suitable package 1 is delivered through a guide 3.
The multifilament yarn is sent out by the thread feed roller 4 that rotates at a speed of four times or more than the surface speed of the roller 14, and has the effect of actively feeding out the multifilament yarn together with a high-speed fluid provided behind the thread feed roller 4. While being opened through an ejector 5, the thermoplastic fibers are fed into the cylindrical chamber 6 in a tangential direction and in a direction opposite to the direction of rotation of the multifilament yarn of thermoplastic fibers, that is, the core yarn 8.

The purpose of opening the yarn here is to make a large number of loops protrude from the yarn body.

On the other hand, the core yarn 8 is taken out from the package 7, passed through a guide 9, adjusted to an appropriate tension by a tensor 10, and fed to a fixed length by a core yarn feed roller 11.

Then, the heating body 12 is heated by the fluid heating element 13.
The core thread is then heated by the fluid heating element 13 and travels along the axis of the cylindrical chamber 6 through the core thread introduction pipe 20 located approximately at the center of the upper plate 19 of the cylindrical chamber 6.

On the outer periphery of the core yarn 8 that rotates around the axis of the cylindrical chamber 6,
The twisted yarn 2 made of continuous multifilament yarn is wound,
A large number of loops are formed in the outer layer of the core yarn 8 while being entwined in multiple layers, and the core yarn 8 and the loops are pulled out from the cylindrical chamber 6.

21 is a fluid discharge hole. The core yarn 8 is then guided to the fluid heating element 13, where it is heated and untwisted to become a bulky textured yarn, and the loops of the twisted yarn 2 laminated and tangled around the core yarn 8 have an apparent appearance. After it becomes a real twist and is firmly fixed to the core yarn 8, it becomes a spun yarn type 18 and is pulled out by a delivery roller 14, and wound into a package 17 whose surface is driven by a winding roller 16, and is bulky and soft. This allows for stable production of yarn that has a pleasant feel and has excellent practical performance.

15 is a guide.

Here, as a method of laminating and entangling the core yarn with the core yarn, there is an alternative method, as shown in FIG. The thread is sent out by a thread feed roller 4 that rotates at a speed of four times or more, and the thread is fed out by an ejector 5 that actively sends out the thread together with a high-speed fluid provided behind the thread feed roller 4. The ejector 5 collides with a collision plate 24 made of a flat surface, a curved surface, or a combination thereof in front of the ejector 5, and slides along with the fluid on a guiding guide plate 22 connected to the collision plate 21 while diffusing the fluid. The fibers are opened and wound around the surface of a rotating conical or cylindrical spindle 23 to form a filament layer, and the filament layer is continuously heated by the spindle and runs through the hollow hole. A method of winding the core yarn inside out at the tip of the spindle at 23° and pulling it out while intertwining it, or a method similar to that shown in FIG. The fluid heating element 1 is opened at a speed more than four times the surface speed of the delivery roller 14 while
It is preferable to wrap the core thread 8 around the core thread 8, which runs while being heated by the method 3, but it is preferable to wind the core thread 8 while being heated by a fluid heating element, a mechanical false-twisting spindle, or a friction heating element, etc. In the heating region of the core yarn made of filament yarn, a twisted yarn made of other substantially non-twisted multifilament yarn is actively supplied at a speed at least four times the withdrawal speed of the core yarn, and the yarn is twisted. The method is not particularly limited as long as it is a method of entangling by untwisting after entangling.

With this method, the twisting yarn is tightly wound around the core yarn, and when producing intertwined yarns, a heater is installed upstream from the entanglement point of the core yarn to heat set the heating state of the core yarn. Providing this is essential in the present invention.

In other words, by providing a heating element before the entanglement point of the twisted yarn, the shrinkage force of the core yarn of the thermoplastic fiber absorbs excess slack, lowering the Young's modulus of the heated yarn and making it easier to heat. At the same time, the twist shrinkage rate was lowered to stabilize the twist form, eliminating tension fluctuations and twist number fluctuations, making it possible to perform extremely stable processing by supplying a constant length of core yarn.

Here, as the heating element, a normal plate heater is suitably used, but a hot roller type, hollow tube heater, etc. may also be used.

In addition, the reason why this heating element is placed upstream of the entanglement point of the threads is that by setting the heat in the heating area of the core thread, not only stable processing as mentioned above is possible, but also continuous processing. This is because the core yarn is untwisted by the fluid heating element that is attached to the core yarn, and the core yarn is simultaneously subjected to false twisting. The friction becomes larger and the entanglement property also improves.

Furthermore, by crimping the core yarn, the yarn becomes softer and a bulkier and more flexible fabric can be obtained.

On the other hand, if a heating element is placed between the entanglement point and the fluid heating element,
The entangled yarns with poor entanglement properties are squeezed by the heating body, and the Young's modulus of the passing yarns is reduced, which prevents the twisting from returning from the fluid heating element, resulting in insufficient entanglement properties of the entangled yarns. This is because there are problems such as this, which makes it undesirable.

In addition, actively feeding the twisting yarn at a speed more than four times the withdrawal speed of the core yarn means that the twisting yarn is tightly wound around the core yarn, entangled, and flows out as an apparent real twist. necessary to make
This is because if it is less than 4 times, the entanglement property will be poor, and preferably it is 5 times or more.

However, if the doubling (supplying speed of the threaded yarn/drawing speed of the core yarn) is too large, the entanglement property will improve, but the resulting yarn will become thicker, so it may be set appropriately depending on the application.

As described above, according to the method of the present invention, bulky spun yarn-like yarn can be stably and inexpensively obtained in one step using simple equipment.

Example Using the manufacturing equipment shown in FIGS. 1 and 2, polyester multifilament yarn 100D-24F was used as a core yarn, and polyester multifilament yarn 50D-2/4F having a yarn twist of about 15 T/M was twisted. It was processed as yarn under the following conditions.

Here, the cylindrical chamber used is one with an inner diameter of 3 mmφ at the shaft center (the part where the thread is wound around the core thread and intertwined with each other) and a height of 5 mm, and the spindle has a tip diameter as shown in Figure 4. A =
2 muφ and a taper angle α=2° were used.

A 20CrfL plate heater was used as the heating element, and the temperature was 210°C.

Stirring thread supply speed 700 m1m1n, withdrawal speed Loo
m/min, high pressure air is used as the fluid for the ejector and fluid heating element, and the ejector is Lkg.
/ff1G1 fluid heating element was 4.0ky/criG1 spindle rotation speed was tso, oo orpm.

Next, using the false twisted yarn of polyester 150D-48F as the warp, the textured yarn obtained by the method of the present invention was incorporated into the weft to create a 2/2 twill fabric.

The results are shown in the table.

Although it differs slightly depending on the feed ratio, in comparison with Comparative Examples 1 to 3, which have a fixed length feed and no heating element, Examples 1 to 4 of the present invention can all be stably processed within the range of the examples, and the heating tension is stable. It has excellent intertwining properties, stability, and texture.

Furthermore, compared to the conventional method using constant tension feeding and no heating element in Comparative Examples 4 and 5, the texture is softer and bulkier, and the entanglement property is also improved.

In addition, the entanglement property was measured using an conjugation force tester (manufactured by Maeda Seiki), with a load of 31/1, 10 strands were aligned, and 1 was attached to a bird chrome needle.
The state of change in the thread was visually judged after 100 times of hanging at a 45° angle.Stability was judged by tension fluctuation, thread cutting, etc.For texture, softness and bulk were judged by 5 people. This is the judgment made by the judge.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the device used in the present invention, FIG. 2, and FIG. FIG. 3 is an enlarged view of the spindle used; 2... Stirring thread, 4... Stirring thread feed roller, 5... Ejector, 6...
・Cylindrical chamber, 8... Core thread, 11... Core thread feed roller, 12... Heating body, 13...
... Fluid heating element, 14 ... Delivery roller, 17 ... Winding package, 21 ...
... Collision plate, 23 ... Spindle.

Claims (1)

[Claims] 1. When a multifilament yarn of thermoplastic fiber is heated, untwisted and pulled out without being run, the substantially untwisted multifilament yarn is transferred to the multifilament yarn of thermoplastic fiber in the heating area along with a fluid at a drawing speed. A spun yarn kite characterized in that the fibers are fed and entangled while being actively opened at a speed of four times or more, and the heating state of the multifilament yarn of the thermoplastic fibers is set by heat on the upstream side of the entangling point. How to make yarn.