JPH08209478A - Production of spun yarn like special yarn - Google Patents

Abstract

PURPOSE: To provide a method for producing a soft spun yarnlike special yarn, comprising two or more multifilament yarns and having intermittent thick parts in which a sheath yarn is multiply wound around a core yarn in the longitudinal direction of the yarn and many loops are formed in the whole yarn and excellent fancy effects and warmth. CONSTITUTION: A multifllament yarn is fed to a fluid jetting nozzle 10 capable of applying a driving force and a turning force thereto, doubled with another multifilament yarn overfed at a higher feed rate than that of the multifilament yarn by >=5% on the yarn inlet side of the fluid jetting nozzle 10 and moved through a doubling point 8. Two or more thick parts/m in which the other overfed multifllament yarn is wound around the multifilament yarn in plural layers are formed in the longitudinal direction of the yarn and a jetting stream is jetted on the side of the yarn on the yarn outlet side of the fluid jetting nozzle 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises two or more multifilament yarns, and intermittently has a thick portion formed by multiple windings of a sheath yarn around a core yarn in the longitudinal direction of the yarn, and The present invention relates to a method for producing a special spun tone yarn that has a large number of loops formed throughout the yarn, has an excellent fanci effect, and is soft and warm.

[0002]

2. Description of the Related Art A fan sea yarn in which two or more types of multi-filament yarns are used to alternately form a single winding portion (non-slab portion) and a multiple winding portion (slab portion) is disclosed in Japanese Patent Publication
43-28258, JP-B-50-35147, JP-A-60-12
It is well known from Japanese Patent No. 6338. However, since these yarns do not have fluff on the yarn surface and the entire yarns are bundled by many wound twists, when they are woven or knitted, they have a strong rough feeling and lack swelling and warmth. ，
Since the non-slab part is simply a single twisted twist, the engulfability of the core yarn and the sheath yarn is poor, and the sheath yarn is apt to slip due to twisting yarn or slight ironing during weaving and weaving, resulting in deterioration of workability and quality. Since false-twist crimping is applied, which is prone to problems in practical use, the fluffy texture peculiar to false-twisted yarn is produced, resulting in lack of tension and waist, and a favorable feeling for clothing cannot be obtained. , Etc. had drawbacks.

Further, Japanese Patent Laid-Open No. 58-8146 proposes a method of supplying a core yarn and a sheath yarn to a fluid jet nozzle capable of imparting a swirling action and a propulsion action to a yarn. In order to draw out the processed yarn in the running direction of the core yarn, a knot yarn consisting of a thick portion in which the sheath yarn is wound around the core yarn and the details in which the core yarn and the sheath yarn are twisted in a strong twist shape is formed, and the yarn surface is formed. Since it does not have loop fluff, it has a drawback that it exhibits a strong twisted tone similar to the above-mentioned fan yarn and has a strong coarse and hard feeling, and lacks swelling and warmth. Moreover, in this method, since the sheath yarn is joined to the core yarn in the fluid jet nozzle, the movement of the yarn joining point is restricted, and the sheath yarn is liable to be squeezed on the inner wall of the fluid jet nozzle to easily break the single yarn There is a drawback that.

Furthermore, in order to enhance the span-like effect,
A fan yarn having a large number of loops formed on the entire yarn and its manufacturing method are disclosed in Japanese Utility Model Publication No. 53-49882 and Japanese Patent Application Laid-Open No. 56-1125.
No. 28, etc. For the processed yarns obtained by these methods, the core yarn and the sheath yarn are supplied to the same fluid ejection nozzle, the sheath yarn is temporarily oversupplied, and the sheath yarn is multiply accumulated on the outer periphery of the core yarn and entangled. A slab having a loop is formed intermittently.

[0005]

In the above method, since the sheath yarn is temporarily over-supplied when the slab is formed, the entanglement of the slab is reduced and a large number of large loops are formed in the slab. Will be. Therefore, the yarn looks thick at the yarn stage, but the voids between the constituent filaments are too large. Therefore, when this yarn is made into a woven fabric, the voids disappear or are reduced due to the suppression of the adjacent warp or weft yarns. The morphological fastness was poor, and the surface effect on the fabric could not be effectively exhibited.

The present invention eliminates the above-mentioned drawbacks of the conventional fan yarns, has a good shape fastness in the thick portion (slab portion), and the shape of the thick portion is clear even when it is made into a cloth. An object of the present invention is to provide a method for producing a special span tone yarn capable of imparting a wide variety of appearances and a soft tone with a soft tone of span tone.

[0007]

DISCLOSURE OF THE INVENTION The inventors of the present invention obtain multi-filament yarns as described above to obtain a fan yarn that can impart a varied appearance and a soft and warm texture with a span tone to a fabric. As a result of intensive study, the fluid injection nozzle that gives a propulsive force and a swirling force to the yarn is used to form the thick part with a multi-winding structure, and the outer layer has a loop formed between the thick parts. The present invention has been achieved by finding that the above object can be achieved by forming entanglement and loops.

That is, according to the present invention, the multifilament yarn is supplied to a fluid jet nozzle for imparting a propulsive force and a swirling force to the yarn, and at the yarn inlet side of the fluid jet nozzle, it is 5% or more than the multifilament yarn. Another multifilament yarn that has been overfied is combined with the multifilament yarn to move the compounding point, and the other multifilament yarn that has been overfied to the multifilament yarn is wound in a plurality of layers to form a thick portion. Manufacture of special span-adjusted yarn characterized by forming 2 or more yarns / m in the longitudinal direction of the yarn and forming a loop on the yarn by jetting a jet on the yarn side surface at the yarn outlet side of the fluid injection nozzle. The method is the gist.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a schematic process diagram showing an example of an embodiment of the method of the present invention. In FIG. 2, a multifilament yarn (hereinafter referred to as a core yarn) 1 serving as a core yarn is fed from a supply roller 4 at a constant overfeed rate. Is supplied to the fluid jet nozzle 10 at this time, swirled by the swirling flow of the fluid jet nozzle 10, and twisted between the fluid jet nozzle 10 and the supply roller 4.

On the other hand, another multifilament yarn (hereinafter referred to as a sheath yarn) 2 is supplied from a supply roller 5 at an overfeed rate higher than that of the core yarn 1 by 5% or more, and passes through a guide 9 at an inlet of a fluid injection nozzle 10. The yarn is combined with the core yarn 1. By the swirling action of the core yarn 1 swirled by the swirling flow,
The sheath yarn 2 is wound around the core yarn 1, but the tension of the sheath yarn 2 increases as it is wound, and the yarn combining point 8 moves to the supply roller 4 side. Then, when the tension of the sheath thread 2 increases to a certain limit,
In order to return to a stable twisted state, the compounding point 8 moves in the opposite direction, that is, toward the fluid injection nozzle 10 side (8a), so the tension decreases. Further, when the winding action continues, the tension of the sheath yarn 2 increases again, and the yarn joining point moves in the opposite direction. Due to such reciprocating movement of the yarn combining point 8, the sheath yarn supplied to the core yarn 1 at an overfeed rate higher than this by 5% or more is wound in a plurality of layers to form a thick portion in the longitudinal direction of the yarn. Pieces / m or more will be formed intermittently. The moving distance of the above-mentioned yarn joining point depends on the turning force of the fluid ejection nozzle, the position of the guide, etc.
It is preferable to set so as to be ~ 10. Also, the yarn combining point 8 moves due to tension fluctuations caused by winding the core yarn 2, but the guide yarn 9 is reciprocally moved or air is blown to the yarn combining point 8 to actively move the yarn combining point 8. You can also do

Then, the yarn is jetted from the side of the yarn at the yarn outlet side of the fluid jet nozzle 10 to form a yarn in which the core yarn 1 and the sheath yarn 2 are entangled, and loops and slack are formed. It is wound up by the winding package 7.
In this case, the yarn guided into the fluid jet nozzle 10 is disturbed by the jet flow of the fluid, and the core yarn 1 and the sheath yarn 2 are untwisted and / or opened. However, the core thread 1
Even if the thick portion formed by winding the sheath yarn 2 in a plurality of layers is unwound and / or opened by the complicated winding, the outer layer portion or a part of the layer is unwound. However, the inner layer remains in a wound state.

Further, the yarn is pushed out to the outlet side of the fluid jet nozzle 10 by the propulsive force of the jet flow, and is drawn out at the outlet of the fluid jet nozzle 10 in a direction different from the fluid jet direction. At this time, the untwisted and / or opened yarn is entangled and forms a loop. Therefore, both the thick portion A and the detail B of the yarn exiting the fluid ejection nozzle 10 are yarns in which the loop 3 is formed.

The size and frequency of the thick portion A of the yarn can be changed as desired. For example, the swirling force of the fluid injection nozzle 10, the overfeed rate of the yarn, or the guide 9 is used. The distance between the core threads 1 and the like can be appropriately changed and adjusted.

The special span tone yarn obtained by the present invention is shown in FIG.
As shown in Fig. 5, the thick portion A and the fine portion B are alternately arranged in the longitudinal direction. The thick portion A has a core yarn 1 and a sheath yarn 2 wound in a plurality of layers, and a loop 3 is formed on the outermost filament. Are formed. Therefore, since the inner layer portion of the thick portion A has a dense winding structure with a small porosity between filaments, the shape robustness of the thick portion A against tension and suppression after the fabric manufacturing process and after the manufacturing is increased, and the fabric is changed. It can give a rich appearance. Further, since the loop 3 is formed in the filament of the outermost layer, the degree of void between the filaments is increased, and a span-like feeling can be given. In order to give the cloth the appearance that is rich in variations as described above, 2 thick parts A / m
It is necessary to have the above, and when the thick portion A is less than 2 pieces / m, the surface change is extremely small, which causes defects such as a monotonous appearance of the cloth and occurrence of periodicity.

On the other hand, in the detail B, the constituent filaments of the core yarn 1 and the constituent filaments of the sheath yarn 2 are entangled with each other, and a large number of loops 3 are formed. The fluffy loop 3 significantly improves the soft and warm spanning feeling, and the entanglement further improves the form robustness of the thick portion A.

Further, the spun-tone special yarn obtained by the present invention is composed of raw yarn without being crimped, so that there is no fluffy feeling or fluffy feeling peculiar to the crimped yarn, and tension,
Has excellent waist.

In the present invention, the multifilament yarns serving as the core yarn and the sheath yarn are so-called raw yarns (original yarns) that do not have crimps, and their raw materials are homopolymers such as polyester and polyamide, and these. A thermoplastic synthetic fiber obtained from a copolymer containing a polymer as a main component, a blended polymer, and regenerated cellulose fiber such as rayon and cupra can be used.

The fluid jet nozzle for applying the propulsive force and the swirling force used in the present invention is, for example, as shown in FIGS. 3 and 4, a yarn passing hole 11 from the yarn inlet to the yarn outlet and this yarn passing hole.
11 has a fluid introduction hole 12 opening to the fluid introduction hole 12, and the fluid ejected from the fluid introduction hole 12 is applied to the inner surface of the yarn passage hole 11 facing the fluid introduction hole 12 to form a yarn passing through the yarn passage hole 11. At the yarn outlet of the fluid injection nozzle, a parallel flow for forming a loop by increasing the jetting force to the side face of the yarn and a vortex flow for swirling the yarn are generated at the same time. A fluid ejecting nozzle is used. In this case, in order to increase the turning force, the size of the fluid introduction hole 12 opened in the threading hole 11 is made smaller than the size of the threading hole 11 at that position, or as shown in FIG. It is effective to provide the fluid introduction hole 12 eccentrically to the thread hole 11. On the other hand, in order to increase the propulsive force, the angle α formed between the yarn passage hole 11 and the fluid introduction hole 12 may be reduced, or the diameter of the yarn outlet of the yarn passage hole 11 may be larger than the diameter of the yarn inlet.

In the method of the present invention, it is desirable to increase the propulsive force without lowering the swirling force. Therefore, in consideration of this point, the fluid injection nozzle has the shape of the threading hole and the threading hole of the fluid introducing hole. The angle and the like are appropriately selected.

Next, in order to form a loop or a slack in the yarn, the yarn is drawn out at a yarn outlet of the fluid injection nozzle in a direction different from the jetting direction of the fluid, and the fluid is jetted to the side surface of the yarn. If the jetting force of the fluid, that is, the propulsive force is weak, a loop is less likely to be formed, so a proper propulsive force is required. The fluid pressure of the fluid injection nozzle is 4 to 9
cm ² is preferable.

Further, in the present invention, since the core yarn is combined with the sheath yarn to form a loop, it is over-fed, but the over-feed rate is preferably 2 to 8%. Also, since the sheath yarn is wound around the core yarn in layers, the overfeed is 5% or more, preferably 10 to 40% over the sheath yarn.
It needs to be high. If the difference in the overfeed rate between the sheath yarn and the core yarn is less than 5%, the twisting force of the core yarn is obstructed by the tension of the yarn, the twist transmission becomes insufficient, and the variation of the interlacing point decreases, so It becomes difficult to form a part.

[0023]

EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 Polyester multifilament yarn 75d / 24 as core yarn
f, 75d polyester multifilament yarn as sheath yarn
/ 48f was used to fabricate a spun special yarn under the processing conditions shown in Table 1 according to the production process shown in FIG.

[0024]

[Table 1]

The obtained span tone special yarn has loops in the entire yarn, and thick portions and details are alternately formed,
The number of thick parts was 8 / m. Further, in detail, the core yarn and the sheath yarn are entangled with each other, and the thick portion is a yarn excellent in form fastness against tension and suppression because the sheath yarn is wound around the core yarn in layers. In addition, when only the yarn corresponding to the core yarn was supplied under the same conditions as in Table 1 and the yarn was sampled between the fluid jet nozzle and the supply roller 4, the twisting number was measured to be 700 T / m.
Met.

Using the obtained spun special yarn as warp and weft, weaving a plain woven fabric at a density of 70 warp / 2.54 cm and 62 weft / 2.54 cm, and subjecting it to a usual dyeing finish, the appearance was remarkably changed. A woven fabric having a pongee-like appearance with a rich design effect and soft and warm taste was obtained.

[0027]

According to the present invention, since the swirling force and the propulsive force of the fluid jet nozzle are skillfully utilized to perform winding, entanglement, and loop formation at the same time, it has a thick portion of 2 pieces / m or more. The entire yarn is entangled and looped, and the thick part has a dense inner layer and the outer layer has a loop, which is a relatively coarse winding structure and has a multiple winding structure. ，
Efficiently manufacturing spun-tone special yarns that can improve the form fastness of thick parts and give a fabric using this yarn a variety of appearances and a soft and warm span-like feel. Is possible.

[Brief description of drawings]

FIG. 1 is a schematic side view showing one embodiment of a span tone special yarn obtained by the present invention.

FIG. 2 is a process schematic view showing one embodiment of a method for producing a spun special yarn of the present invention.

FIG. 3 is a vertical sectional view showing an example of a fluid ejection nozzle used in the present invention.

FIG. 4 is a side view showing an example of a fluid ejection nozzle used in the present invention.

[Explanation of symbols]

 A thick part B details 1 core yarn 2 sheath yarn 3 loop 4,5 feeding roller 6 delivery roller 7 winding package 8 compounding point 9 guide 10 fluid ejection nozzle 11 threading hole 12 fluid introducing hole α threading hole and fluid introducing hole Angle between

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuji Obayashi 23 Uji Kozakura, Uji City, Kyoto Prefecture Unitika Ltd. Central Research Laboratory

Claims (1)

[Claims] 1. A multifilament yarn is supplied to a fluid jet nozzle that imparts a propulsive force and a swirling force to a yarn, and the yarn is overfed by 5% or more than the multifilament yarn on the yarn inlet side of the fluid jet nozzle. The multifilament yarn is mixed with the multifilament yarn to move the compounding point, and another multifilament yarn overfed to the multifilament yarn is wound in a plurality of layers to form a thick portion in the longitudinal direction of the yarn. The method for producing a special spanned yarn is characterized in that at least 2 yarns / m are formed on the yarn side, and a jet is jetted to the yarn side face at the yarn outlet side of the fluid jet nozzle to form a loop on the yarn.