JPS63256743A - Production of thick and thin yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing thick and thin yarn by fluid agitation treatment.
Specifically, it relates to a method for producing thick and thin yarn in which thick and silk sections are alternately formed in the longitudinal direction of the yarn through fluid agitation treatment, and loops are formed, and the yarn is given cohesiveness using a twisting device. be.

(Prior art) Conventionally, by changing the supply rate of yarn to a fluid injection nozzle,
Various methods have been proposed for producing slub yarns, nep yarns, and uneven yarns having thick yarn portions partially in the longitudinal direction of the yarn.

For example, in Japanese Patent Application Laid-Open No. 57-1.71728, two filament yarns are supplied to a fluid jet nozzle at different supply rates, and the supply rate of the filament yarn with a higher supply rate is changed by changing the rotation speed of the supply roller. , a method of manufacturing a processed yarn having a thick yarn portion and a silk yarn portion in the longitudinal direction by arbitrarily varying the thickness has been proposed. In addition, the applicant first temporarily applies resistance to the running yarn to retain the overfed yarn, and then unwinds the resistance and rapidly sends the retained yarn to the fluid injection nozzle. A method for forming a thick thread by feeding the yarn is disclosed in Japanese Patent Application Laid-open No. 56-1.
This was proposed in Publication No. 12528.

(Problems to be Solved by the Invention) However, since the former method changes the overfeed rate using a supply roller that can supply variable speed intermittently, there is a limit to the overfeed rate.
The thick yarn portion of the resulting processed yarn becomes elongated, and the gap between the thick yarn portion and the thin yarn portion is unclear, resulting in a disadvantage that only a yarn uneven effect can be obtained. Also, the latter method
Since the overfeed rate can be changed significantly and rapidly, it is possible to clearly determine whether the thick thread part is thick and short, but on the other hand, when forming the thick thread part,
The problem remains that intertwining in the thick yarn portion is reduced and protruding loops are likely to be formed in the thick yarn portion, making it difficult to handle the yarn.

The present invention is intended to eliminate the drawbacks of the conventional methods as described above, and its purpose is to create a large, fine, span-like yarn with a clear thick yarn portion, which has a distinctive appearance effect, and has good unwinding properties. The purpose is to provide a method for manufacturing yarn.

(Means for Solving the Problems) In other words, the third aspect of the present invention is to supply a multifilament yarn to a fluid injection nozzle that imparts a propulsive force and a swirling force to the yarn, and to supply the multifilament yarn to a fluid injection nozzle on the yarn inlet side of the fluid injection nozzle. A thick yarn in which another multifilament yarn overfed than the filament yarn is combined with the multifilament yarn, the doubling point is moved, and the other multifilament yarn overfed the multifilament yarn is wound in a layered manner. The gist of this invention is a method for producing large fine yarn, which is characterized by forming loops intermittently in the longitudinal direction of the yarn, forming loops in the yarn, and subsequently turning the yarn using a twisting device. .

Below, nine methods of the present invention will be explained in detail.

First of all, the method of the present invention uses multifilament yarn.

The multifilament yarn is supplied to a fluid injection nozzle (hereinafter referred to as a jet nozzle) that applies propulsion force and swirling force to the yarn, and another multifilament yarn that has been overfed than the multifilament yarn on the inlet side of the jet nozzle is Pair the threads together.

By moving the yarn doubling point, other multifilament yarns are wound around the multifilament yarn in a layered manner, and a loop is formed by a fluid agitation process using a jet nozzle.

The jet nozzle that applies the propulsive force and swirling force used here is 1. For example, as shown in Fig. 2, the jet nozzle opens into the thread threading hole a extending from the inlet to the thread outlet, and the thread threading hole a. It has a fluid introduction hole, and the fluid jetted from the fluid introduction hole is applied to the inner surface of the yarn threading hole a facing the fluid introduction hole, so that the yarn passing through the yarn threading hole a is parallel flow to provide propulsive force to the jet nozzle, and to increase the ejection force to the side of the yarn to form a loop at the yarn outlet of the jet nozzle.

A jet nozzle is used that can simultaneously generate a vortex flow to swirl the yarn. In this case, in order to increase the turning force, the size of the fluid introduction hole opened in the thread passing hole a may be made smaller than the size of the thread passing hole a at that position, or It is effective to provide a fluid introduction hole eccentrically to the thread passing hole a as shown in FIG.

On the other hand, in order to increase the propulsion force, it is necessary to reduce the angle α between the thread passing hole a and the fluid introduction hole, or to make the diameter of the thread exit of the thread passing hole a smaller than the diameter of the thread entrance. It is better to make it larger.

8 In the method of the present invention, it is desirable to increase the propulsive force without reducing the turning force. Therefore, the jet nozzle takes this point into consideration when adjusting the shape of the thread passing hole and the thread thread of the fluid introduction hole. Appropriately select the angle with respect to the threading hole.

To form loops or slack in the yarn, the yarn is pulled out in a direction different from the fluid jetting direction at the yarn outlet of the jet nozzle, and fluid is jetted onto the yarn side. In this case, the jetting force of the fluid, In other words, if the propulsive force is weak, it becomes difficult to form a loop, so a moderate propulsive force is required.

Thus, by the swirling force of the jet nozzle.

At the yarn entrance of the jet nozzle, the multifilament yarn is wound as a core yarn, and other multifilament yarns supplied at a higher overfeed rate are wound as sheath yarns to form thick yarn parts intermittently. 2. Next, the propulsion force is used to smoothly advance the yarn, that is, to smoothly pass through the yarn passing hole of the jet nozzle, and to maintain a substantial overfeed state of the yarn at the yarn outlet of the jet nozzle, thereby forming a loop. .

Since the multifilament yarn is doubled with other multifilament yarns to form a loop, it is overfed, but the overfeed rate is 2 to 8%.
is preferred. Further, since the other multifilament yarn is wound in a layered manner around the multifilament yarn, an overfeed rate of 10 to 50%, which is higher than that of the multifilament yarn, is preferable. A suitable difference in overfeed rate between both multifilament yarns is 10 to 40%. Furthermore, the fluid pressure of the jet nozzle is 4 to 9 kg/cn.
! degree is preferred.

Next, in the method of the present invention, after forming the thick yarn portion and the loop in the yarn as described above.

The twisting process is performed using a twisting device. As the twisting device used here, twisting devices such as a fluid false-twisting nozzle, a spindle double false-twisting device, a friction false-twisting device, etc. can also be used, but it is particularly desirable to use a fluid false-twisting nozzle. In other words, when using a fluid false twisting nozzle, it is possible to apply false twist to the yarn by lowering the tension of the yarn, and it is possible to perform the turning process without almost reducing the number of loops formed in the yarn. can. In addition, even if the yarn has a large thickness ratio in the longitudinal direction, the heating operation is performed by the flow of fluid, so there is no chance of yarn breakage due to the large yarn diameter getting caught, and processing is possible. There are advantages such as stable operability during operation. The fluid pressure of the above fluid false twisting nozzle is usually 2 to 5 kg/CII!
is preferably used. In addition, spindle type false twisting equipment,
When using a friction false twisting device etc., the number of false twists T (times/m) is T.
It is preferable to set ff to about 23,000 to 30,000.

The method of the present invention will be explained in detail with reference to the following five drawings. FIG. 1 is a process schematic diagram showing an example of an embodiment of the method of the present invention, in which the multifilament yarn F1 is fed from the first supply roller 1 by a certain amount of overflow. is supplied to the jet nozzle 4 at a feed rate.

At this time, it is swirled by the swirling flow of the jet nozzle 4,
Heating occurs between the jet nozzle 4 and the supply roller 1. On the other hand, the other multifilament yarn F2 is fed to the second supply roller 2.
The multifilament yarn F1 is fed from the multifilament yarn F1 at a higher overfeed rate than the multifilament yarn F1, passes through the guide 3, and is combined with the multifilament yarn F1 at the entrance of the jet nozzle. a multifilament yarn F being swirled by the swirling flow;
Due to the turning action of , another multifilament yarn F2 is wound around the multifilament yarn F+, but as the multifilament yarn F2 is wound, the tension of the multifilament yarn Ft increases and the first doubling point moves toward the supply roller l side. .

Next, when the tension of the multifilament yarn F2 increases to a certain limit, the twisting point moves in the opposite direction, that is, toward the jet nozzle 4 in an attempt to return to a stable twisted state, so that the tension decreases. Furthermore, as the winding action continues, the tension of the multifilament yarn F2 increases again and the twisting point moves in the opposite direction. Due to this reciprocating movement of the twisting points, the other multifilament yarn F2, which is supplied at a higher overfeed rate to the core yarn of the multifilament yarn F, becomes a thick yarn wound in multiple layers as a sheath yarn. The portions are formed intermittently in the longitudinal direction of the yarn. The moving distance of the yarn doubling point above is the turning force of the jet nozzle.

Although it depends on the position of the guide, etc., it is preferable to set it to 1, usually 3 to Local.

Next, the yarn is subjected to fluid agitation treatment by the jet nozzle 4 to form the multifilament yarn F and other multifilament yarns F! The threads are intertwined and loops or slacks are formed, and the yarn is taken up by the first take-up roller 5. In this case, the yarn guided into the jet nozzle 4 is disturbed by the jet flow of the fluid, and the two-strand multifilament yarn F,
,F.

is in an untwisted and/or opened state. but.

Multifilament yarn F, multifilament yarn Ft
Even if the thick yarn part formed by winding into multiple layers is subjected to such action, the outer layer part or a part of the layer will be untwisted and/or opened due to the complicated winding. The inner layer is 1! ! It will remain in the rotated state.

Furthermore, the thread is moved to the jet nozzle 4 by the driving force of the jet stream.
At the outlet of the jet nozzle 4, the liquid is pushed out in a direction different from the fluid jetting direction. At this time, the untwisted and/or opened yarns intertwine and form loops. Therefore, both the thick yarn portion and the silk yarn portion of the yarn exiting the jet nozzle 4 become yarns in which loops are formed. In addition.

The size and frequency of the thick yarn portion of the yarn can be changed as desired2. For example, the turning force of the jet nozzle, the overfeed rate of the yarn, or the distance between the guide 3 and the multifilament yarn Ft etc. can be changed as appropriate.

Next, the yarn passing through the first take-up roller 5 is first subjected to false twisting by a fluid false twisting nozzle 6.

Since the yarn has a thick yarn part and a thin yarn part, and a loop is formed on the yarn surface, the false twist heating part of the yarn is not sufficiently untwisted, and therefore the heating-untwisting As a result, untwisted portions remain in the yarn. Note that fluid may be intermittently supplied to the fluid false-twisting nozzle 6 to perform swirling intermittently, and a false-twisting heater may also be used.

The yarn thus subjected to the turning process by the fluid false twisting nozzle 6 passes through the second take-up roller 7 and is wound up into a package 9 by the I-take roller 8.

(Function) As described above, the method of the present invention differs from the conventional method in which large details are formed by changing the feeding rate of yarn to the jet nozzle and performing a fluid agitation process of the jet nozzle. Using swirling force, a thick yarn section is formed in advance by winding on the jet nozzle inlet side, and then entanglements and loops are imparted through the fluid agitation process of the jet nozzle, so the yarn has a clear thick yarn section. Articles can be obtained. In addition, there is extremely little entanglement in the thick yarn portion caused by changes in the supply rate to the jet nozzle, fluctuations in the size of the loops, etc., and stable processing operability can be obtained. And 1
The method of the invention is as described above.

Since the yarn in which the thick yarn portion has been formed is subjected to a twisting process using a twisting device, particularly a fluid false twisting nozzle, untwisted twists remain and the convergence of the yarn is improved.

In other words, as a result of the above-mentioned swirling process, untwisted yarn remains preferentially in the silk thread section, so that the thick thread section and the thin thread section become clear, and the loops and slacks are tightly bundled. Become.

As described above, the processed yarn obtained by the method of the present invention has extremely good weaving and weaving properties without any unraveling defects due to catching between the processed yarns. In addition, since the twist direction or twist density changes with the thick yarn part where the yarn diameter increases, when made into a woven or knitted fabric, the thick yarn part looks conspicuous, and the change in gloss due to the change in the number of twists creates a characteristic characteristic. It has a certain cloth appearance.

(Example) The method of the present invention will be specifically explained below with reference to Examples.

Example Using polyester multifilament yarn 75d/36f as multifilament yarn F+ and polyester multifilament yarn 75d/48f' as multifilament yarn F, following the manufacturing process shown in FIG. 1, as shown in Table 1. Thick and thin threads were produced according to processing conditions.

Table 1 In this case, the heating number of multifilament yarn F due to the swirling force of the jet nozzle was 800 T/M. Further, the moving distance of the thread doubling point was approximately 5011 points.

The obtained large fine thread has a thick thread part and a silk thread part,
In the thin yarn portion adjacent to the thick yarn portion, there were a portion having a twist in the same direction as the thick yarn portion and a portion having a twist in the opposite direction to the thick yarn portion. The length of this thick thread part is 2~5a1. The maximum thickness is 4m, tl! ! The number was 100 to 300 T/M, while the length of the silk thread portion was 10 to 50 T/M, and the thick thread portion was clear. Among the silk thread parts adjacent to the thick thread part, the number of twists in the part having a twist in the same direction as the thick thread part is 800 to 13001'
/M, and the number of twists of the other silk thread portion was 300 to 600 T/M.

When the above-mentioned large fine yarns were woven into a woven fabric, the weavability was good, and the surface of the obtained woven fabric was characterized by the presence of a partial thick yarn part and the change in gloss due to the change in the twist direction. It had a pongee-style appearance that was extremely elegant.

(Effects of the Invention) As described above, according to the method of the present invention, it is possible to obtain a large, spun-like yarn with a clear thick yarn portion, a characteristic appearance effect, and good unwinding properties.

[Brief explanation of drawings]

FIG. 1 is a process schematic diagram showing an example of the manufacturing process of the method of the present invention, and FIGS. 2 and 3 are a longitudinal sectional view and a side view of an example of a jet nozzle used in the method of the present invention. Fl-・-・Multifilament yarn F2・・・・Other multifilament yarn 1・−・−・
First supply roller 2 --- Second supply roller 3 --- Guide 4 --- Jet nozzle 5 --- First take-up roller 6 --- Fluid false twisting nozzle 7 --- Second take-up roller 8 --- Winding roller 9 --- Package a --- Yarn threading hole b --- ...Fluid introduction hole

Claims (2)

[Claims] (1) A multifilament yarn is supplied to a fluid injection nozzle that applies a propulsion force and a turning force to the yarn, and another multifilament yarn overfed than the multifilament yarn is fed on the yarn inlet side of the fluid injection nozzle. The multifilament yarn is combined with the multifilament yarn and the yarn combining point is moved to form thick yarn parts intermittently in the longitudinal direction of the yarn, in which other multifilament yarns overfed the multifilament yarn are wound in layers. At the same time, a loop is formed in the thread,
A method for producing thick and fine yarn, which is characterized by subsequent turning treatment using a twisting device. (2) The method for producing thick and fine yarn according to claim 1, wherein the twisting device is a fluid false twisting nozzle.