JPS6015736B2 - Manufacturing method of composite wound yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite wound yarn, and more particularly to a method for manufacturing an Enoki wound yarn having an appearance and texture similar to a spun yarn.

Conventionally, when applying two or more yarns to the false twist crimp process, by changing the amount of combination between the yarns, yarns with a large amount of supply were alternately arranged around small yarns of the lacquer thread. It is known to obtain composite wound yarns wound around.

This kind of wound yarn has been crimped and has a special wound structure, so it has a texture similar to that of spun yarn, and has been evaluated as such. In this composite wound yarn, it is most ideal for the wound yarn to be evenly wound around the core yarn in the form of alternating twists in the S and Z directions, but in order to obtain such a structure, one way is necessary. The yarn, that is, the wound yarn, must be fed with an overfeed amount of several hundred percent, and a feeding roller is required for each yarn, which is extremely disadvantageous in terms of equipment and equipment space. Furthermore, from a process perspective, in the conventional method, a hollow spindle with a twist bar inside is used as a false twister, so the thread with a wound structure is wound once around the twist bar. Because it runs in contact, it is subjected to harsh squeezing action, which tends to cause unevenness in the wrapping condition.

Moreover, in the case of the spindle, the scale twisting tension is higher than the twisting tension (that is, the K value expressed as the ratio of the scale twisting tension to the twisting tension is at least 1.5). The effect is on an ever-increasing number of desires. Furthermore, if the amount of yarn to be wound is high, uneven winding is likely to occur, leading to instability of the process, yarn breakage, etc. Of course, in order to prevent uneven winding, it is sufficient to relatively reduce the amount of overfeed of the winding yarn, but on the other hand, it becomes impossible to obtain a sufficient winding condition in the form of alternately twisted S and Z yarns.

This makes it easy for the wound yarn to slide on the core yarn, and in particular, during the process of forming rope fabrics, the wound structure is easily destroyed, creating nep and weaving defects, as well as the characteristics of the yarn grains being lost to the hem fabric. This results in the fatal flaw that they are not fully utilized.
Therefore, an object of the present invention is to provide a stable and uniform composite wound yarn with no fear of yarn breakage or rolling of the wound yarn, using an apparatus that is simpler and cheaper than conventional devices.

In the course of various studies to achieve the above object, the present inventors focused on a false twister that does not give a straining effect to the yarns, that is, a fluid type false twisting nozzle, and processed two yarns in a aligned state. However, I could only obtain a composite yarn in the form of a plied twist.

However, based on the assumption that this fluid-type false-twisting nozzle is superior to a hollow spindle in terms of a uniform winding structure, further study was conducted on the assumption that the fluid-type false twisting nozzle is superior to a hollow spindle in terms of a uniform winding structure. We found out that the winding effect is effective,
The present invention has been achieved. That is, in the present invention, two or more types of multifilament yarns having a difference in elongation of at least 50% or more are pulled together and the K value (ratio of untwisting tension to twisting tension) is set to 1. While maintaining the elongation at 0 or less, a yarn with a high elongation is wound around a yarn with a low elongation by supplying the yarn, and after heat-setting this winding structure, the false twisting nozzle which has no ironing effect is used. This is a method for producing a composite wound yarn characterized by stably forming an unscaled twisted portion by passing the yarn through the yarn.

To explain this further, the main feature of the present invention is that, unlike the conventional method, two or more yarns with different elongations are aligned in a parallel state, and a fluid false twisting nozzle is used for the vertical false twisting process. By adding it, it is possible to produce a uniform and stable wound yarn.

For this purpose, first of all, the difference in elongation between yarns must be at least 50% in terms of yarn usage. When these two yarns are introduced into a fluid false twisting nozzle, both yarns begin to be twisted in a doubled state, but since there is a difference in elongation between the yarns, a yarn with an elongation of 4. A thread with high elongation comes to be wrapped around it like a covering. Fluid-type false twisting nozzles include Mochiko Sho 36-10511 and Hakama Kosho 36-11.
As described in Japanese Patent Application No. 348, it refers to a method in which the yarn is swirled by a fluid, and a pressure of 3 kg/or more is particularly preferably used as the fluid.

In such a false twisting nozzle, unlike a conventional spindle, the yarn passes through the nozzle without being squeezed, so the untwisted part is formed smoothly and interspersedly, resulting in S, Z alternately twisted yarn. It will have a wrap-around structure. The combination of two yarns used in the present invention is a filament yarn with an elongation of 90 to 250%, a filament yarn with an elongation of 20 to 50%, a filament yarn with an elongation of over 300%, and a filament yarn with an elongation of 90%.
Filament yarns having an elongation of up to 250% include filament yarns having an elongation of more than 250% and filament yarns having an elongation of 20 to 50%.

Here, a filament yarn with an elongation of 90 to 250% is an intermediately oriented yarn made of a thermoplastic polymer wound at a weaving speed of 2500 m/min or more, or a filament yarn wound at a weaving speed of 2000 m/min or less. It can be obtained by drawing a so-called undrawn yarn at a low magnification. In addition, the elongation is 20-50%
The filament yarn is a so-called drawn yarn made of a thermoplastic polymer, and the filament yarn having an elongation exceeding 250% means an undrawn yarn obtained at a spinning speed of 2000 min. or less. In case of A, the processing conditions are pneumatic pressure 3 to 5 k9/ground, yarn overfeed amount 5
~30%, and a heat setting temperature of 180-220°C is adopted.
In addition, in the case of the opening, the fluid type pneumatic pressure is 3 to 5 k9/s, the underfeed amount is 100% or less (that is, the stretching ratio below the sound of 2), the heat setting temperature is 17 y to 200 qo, and in the case of c, the compressed air pressure is 3 to 5 kg/ ground, overfeed amount 5-30%,
A heat setting temperature of 175-200°C is employed. Here, the pneumatic pressure is necessary to twist the yarn sufficiently, and the overfeed is necessary to burn the yarn and keep the K value below 1.0 (to eliminate the influence of the ironing effect). It was set for this reason.

On the other hand, in the case of yarn, it is necessary to perform stretching and false twisting to improve the physical properties (strength) of the composite yarn itself, but in this case as well, the stretching ratio is at most 2. Even the pitch sound is adopted. As a result, the K value is also 1.0 or less (subordinates are 1.5 or more),
There are also no spots on the wrapping structure. Hereinafter, the present invention will be explained with reference to the accompanying drawings. In FIG.
After being taken out from ', they join together at the guide 3 and are introduced into the false twisting and crimp processing area through the feed rollers 4 in an aligned state.

In this castle, the filament yarns 1 and 1' are first subjected to a false twisting action by the fluid false twisting nozzle 6, and at this time, due to the above-mentioned reason, a structure is formed in which the filament yarn 1 is wound around the filament yarn 1' (covering state). , in this state, heater 5
is heat-set. Next, the heat-set yarn is untwisted by the nozzle 62, but since the K value is extremely low at this time, an untwisting phenomenon actually occurs, and the yarn becomes an alternately twisted yarn and is then passed through the delivery roller. 7 and then wound onto a bobbin 9 driven by a lo-fu 8. Fig. 2 shows an additional step of obtaining filament yarn 1 by drawing, and 10 is a drawn filament yarn with an elongation of over 300%, for example, and is drawn between lo-fu 11 and 12 with an elongation of 1.5 to 2. The filament yarn 1 is drawn at a stretching ratio of approximately the same as the needle sound to obtain a filament yarn 1 having a density of 90 to 150%, and then processed in the same manner as in the process shown in FIG. In this way, even from one type of undrawn yarn,
By changing the stretching ratio, crimped yarns with various variations can be obtained. The appearance of the composite wound yarn obtained by the present invention is as shown in FIG. 3 (micrograph).
The winding thread is wound continuously around the core thread (black) at least three times in each of the S and Z directions, and the winding structure as a whole is uniform and tight.

Such a winding structure not only looks good, but is also extremely stable against physical stress. Therefore, the features of such a composite wound yarn are maintained as they are during the preparation of knitted fabrics and the side weaving process, and are fully reflected in the final product. on the other hand,
Figure 4 (micrograph) shows the highest level of winding when a conventional hollow spindle is used as a false twister, but there is a difference between the winding state in the S direction and that in the Z direction, and the overall If you look at it as such, it cannot necessarily be said to be balanced.

Moreover, since the wrapping structure is constantly inverted in short cycles, it is unstable even when subjected to ironing. In the present invention, the term "filament yarn" refers primarily to BoIJ ethylene terephthalate, but it may also be one copolymerized with a third component in a proportion of 15 mol% or less.

Further, the polyester may contain additives such as matting agents, colorants, stabilizers, and elutriation agents. The denier of undrawn yarn and drawn yarn should be selected depending on the product's intended use, but generally the total denier is ≥ wrapped yarn.
It is best to use a core yarn of 75 to 35 e for the former, and 50 for the latter.
˜15Me is particularly preferable.

The undrawn yarn and the drawn yarn may have the same filament cross-sectional shape, the content of the degreaser, the presence or absence of the coloring agent, but at least one of these may be different.

As described above, according to the present invention, a spun yarn-like composite wound yarn can be obtained by skillfully utilizing the interaction between two yarns with different elongations and a fluid false twisting nozzle. As a result, it has a uniform and stable wrapping effect during processing, resulting in a material with significantly improved handling properties.

Moreover, the excellent handling properties of this material itself means that various troubles such as neps caused by slipping of the winding yarn, and even yarn breakage, can be avoided during the process from the raw material through the bran weaving process to the final product. . Therefore, the characteristics of the material are directly reflected in the characteristics of the knitted fabric. In addition, since such a convoluted thread consists of a core thread with low elongation and a wrapped thread with high elongation, there is no practical problem in terms of strength and elongation.

Furthermore, even if there is a difference in dyeability between the core thread and the winding thread, the winding state is even, eliminating concerns about heather spots, and providing a value-added material. Example 1 Elongation 1 obtained by high speed spinning of 3500 skins/min
00% polyester filament yarn (11 e/3 elongation 1) and drawn polyester filament yarn (7 elongation/18 il) with elongation of 30% were aligned and subjected to false twisting in the process shown in Figure 1. .

That is, the above-mentioned drawn polyester filament yarn and undrawn polyester filament yarn are aligned and fed to the feed roller of the temporary lacquer processing machine, and then the heat treatment means of the Washi heat method and the samurai are placed between the feed roller and the take-up roller. A pneumatic pressure of 4k is applied by a false twisting device having a false twisting means of a pneumatic false twisting nozzle described in Publication No. 36-11348.
9/Water, heater temperature: 20000, overfeed: 7%, K value 0.42, yarn speed 100 threads/min. False twisting was performed.

Ease of handling (workability) of the composite wound yarn obtained in this way
The experiments shown in Table 1 were conducted to compare the hollow spindle method in terms of texture, cost, etc. In addition, the K value was 3.9 in all cases. Looking at the first surface winding structure, the yarn according to the present invention has a complete two-layer structure with a uniform alternately twisted yarn-like winding structure as shown in FIG. 3, whereas the yarn obtained in the comparative example The thread was found to be wrapped only partially, and the other parts were aligned.

Next, each thread is used as a warp thread and a striped thread, and the fineness warp is 78.
Table 2 shows a comparison of the number of stops of the loom, the texture of the passed fabric, and the cost when a plain woven fabric was obtained with 75 stripes/inch.

2 Note 1) The main causes of the number of loom stops are troubles such as slipping of the ring thread, warp breakage due to slab K, etc. Note 2) The main causes of non-plywood fabrics are poor quality due to neck and slab K. As is clear from the comparison, the composite yarn obtained using a hollow spindle (experimental 1) does not have the handling properties required in the weaving process as it is. Although additional operations such as interlacing, twisting, or fusing are required to improve the performance, the workability still falls short of the workability of the composite yarn of the present invention.

Example 2 In Example 1, a cationic dyeable polyester filant yarn (elongation 30%, 7 phantom e/24fil) was used as the low elongation filament yarn, overfeed was 10%, K value: 0.42, Heat fixing temperature (heater)
) The same processing was performed except that 180 and 0 were set.

For comparison, a hollow spondle was used as a temporary combustion element, temporary combustion number 2320T/M, overfeed 5%, K value: 3.3
Processing was performed at a heater temperature of 190q○ to obtain a composite yarn.
When looking at the winding structure, the composite winding yarn of the present invention as shown in Figure 3 exhibited a uniform winding state, but the yarn obtained as a comparative example had significant winding unevenness and was not evenly aligned. Some parts remained.

Next, a plain woven fabric was obtained from these two types of composite yarn in the same manner as in Example 1, and the evaluation at that time is shown in Table 3.

Table 3 As is clear from the above table, there is not only a huge difference between the present invention and the comparative example in terms of yarn workability, but also in terms of texture and heathering uniformity of the fabric. The yarn of the present invention is also extremely superior.

Example 3 Elongation 4 obtained with paper yarn at a speed of 1400 m/min
00% polyester filament yarn (17 e/48
il) and a polyester filament (11
9e/24fil) were aligned and subjected to false twisting in the process shown in FIG.

That is, the above-mentioned undrawn polyester filament yarn and partially oriented polyester filament yarn are aligned and fed to the feed roller of the false twisting device, and then an electrothermal heat treatment means and a Japanese Patent Publication Publication No. 1973 (1976) are placed between the feed roller and the take-off roller. A false twisting device having a pneumatic false lacquer nozzle false twisting means described in Japanese Patent No. 111348 is used to create a pneumatic
False twisting was carried out at a heater temperature of 185 oo kg/min, an underfeed rate unevenness % (ie, a stretching ratio of 1. paper times), a K value of 0.37, and a system speed of 100/min. The processed yarn thus obtained had a uniform alternately twisted two-layer structure as shown in FIG. In addition, when this yarn was used for weaving, the number of stops of the loom was 0.01 times per thread on average, and the passing yield was 99.5%, which was good, and the resulting fabric had a spun-like texture. .

On the other hand, in the above example, the same processing was performed except that a hollow spindle type false twister was used in place of the fluid type false twisting nozzle (however, the K value was 4.1). Appropriate processing tension could not be obtained (increased ballooning) and yarn breakage occurred frequently. In order to prevent this processing yarn breakage, it is necessary to increase the processing tension, which requires a stretching ratio of 1.55.
It was equivalent to However, in this case, the thread as it passed through the hollow spindle was subjected to the severe squeezing action by the twist bar, resulting in uneven winding as shown in Figure 4, making it impossible to put it to practical use as a material for woven rope. Example 4 Elongation 4 obtained with /mjn class yarn at speed 1400
00% polyester filament yarn (129e/4 spot 1) and 30% elongation drawn filament yarn (7&e/18
il) were aligned and subjected to false twisting in the process shown in FIG.

That is, the above-mentioned undrawn polyester filament yarn and drawn polyester filament yarn were aligned, and then heated using an air false twisting device at a pneumatic pressure of 4k9/ground and a heater temperature of 18520.
, overfeed rate 10%, K value; 0.29, yarn speed 1
Preliminary combustion processing was performed at 00 m/min. The processed yarn thus obtained had a uniform alternately twisted two-layer structure as shown in FIG.

In addition, when this textured yarn was used to weave, the number of stops of the loom was 0.01 times per thread on average, and the yield rate was 99%, which was good, and the resulting fabric had a spun-like texture.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are schematic diagrams showing embodiments of the present invention, FIG. 3 is a micrograph showing the appearance of the composite thread according to the present invention, and FIG. 4 is a conventional composite winding yarn. It is a micrograph showing the appearance of attached threads.

- 1,1'...Filament yarn, 2,2'...Package, 4...Feed loaf, 5...Heater, 6...Fluid false twist nozzle, 7...Delivery loaf, 10...Undrawn filament.

game wing talent 2 style Figure 3 Figure 4

Claims (1)

[Claims] 1. K value (ratio of untwisting tension to twisting tension) when two or more types of multifilament yarns with a difference in elongation of at least 50% are pulled together and applied to a fluid false twisting nozzle. While maintaining the value of 1.0 or less, a yarn with a high elongation is wound around a yarn with a low elongation by supplying it, and after heat-setting this winding structure, the temporary A method for producing a composite wound yarn characterized by stably forming an untwisted portion by passing the yarn through a twisting nozzle. 2. A patent claim in which the two or more filament yarns have a difference in elongation of at least 50% and are a combination of a partially oriented filament yarn with an elongation of 90 to 250% and a drawn filament yarn with an elongation of 20 to 50%. The manufacturing method according to item 1. 3. A patent claim in which the two or more types of filament yarns with a difference in elongation of at least 50% are a combination of an undrawn filament yarn with an elongation of more than 250% and a partially oriented filament yarn with an elongation of 90 to 250%. The manufacturing method described in Scope 1. 4. Claim No. 4, wherein the two or more types of filament yarns having a difference in elongation of at least 50% are an undrawn filament yarn with an elongation of more than 250% and a drawn filament yarn with an elongation of 20 to 50%. The manufacturing method described in item 1. 5. The manufacturing method according to claim 1, 2, 3, or 4, wherein the filament yarn is made of a polyester polymer.