JPH05117930A - Production of fancy yarn - Google Patents

Abstract

PURPOSE:To stably obtain fancy yarn having clear and tightened stub parts by temporarily applying resistance to running multifilament yarn, wholly interlacing the stored formed yarn and then subjecting the interlaced yarn to fluid jetting texturing and bundling heat treatment. CONSTITUTION:Multifilament yarn (Y1) is subjected to fluid jet texturing with a fluid jet nozzle 4 while being fed at a constant overfeeding ratio between feed rollers 1 and take-off rollers 5. In the process, an intermittently acting resistor 3 is installed between the fluid jet nozzle 4 and the feed rollers. The yarn slacked between the resistor 3 and the feed rollers 1 in applying the resistance is sucked under a negative pressure to form resident yarn. Compressed air is simultaneously blown on the base of the resident yarn to interlace the resident yarn over nearly the whole length. The yarn is then subjected to fluid jet texturing with the fluid jet nozzle to intermittently form triple parts in the longitudinal direction of the yarn. The resultant yarn is subsequently heat- treated while being turned with an air swirling nozzle 7. Thereby, the objective fancy yarn is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fluid-treating a multifilament yarn to produce a fan yarn having a partially distinct slab portion.

[0002]

2. Description of the Related Art Conventionally, a method for producing a fan yarn by subjecting a multifilament yarn to a fluid treatment is disclosed in Japanese Patent Publication No. 45-152.
Various proposals have been made in Japanese Patent Publication No. 19 and Japanese Patent Publication No. 63-14103.

First, in Japanese Examined Patent Publication No. 45-15219, a multifilament yarn is partially formed with an arch-shaped portion, and then the base end portion of the arch-shaped portion is entangled and then made parallel to the yarn main body. A method for manufacturing a decorative yarn, which is integrated and intermittently forms a triple yarn layer portion, is disclosed. This method uses two nozzles with air jet action to constantly inject compressed air from a vertical direction to a multi-filament yarn running at a constant overfeed amount to form an arch-shaped portion in a downward direction. Then, after intermittently injecting compressed air from the lateral direction to bond the filaments at the base ends of the arch-shaped portions together, fluid treatment is performed via the take-up roller.

In this method, however, a clear slab portion can be partially formed, but since only the base end portion of the arch-shaped portion is entangled in the intermediate step, the slab portion can be used as a guide or the like protruding from the threading hole of the nozzle. There was a problem that the arched part was caught and the workability was reduced.

On the other hand, in Japanese Patent Publication No. 63-14103, in the fluid jet processing, the yarn is temporarily provided with resistance to change the amount of the yarn supplied to the fluid jet nozzle and the slab portion is intermittently formed. A method of making a fan yarn is disclosed.
In this method, resistance is temporarily applied to the yarn running between the supply roller and the fluid jet nozzle, and the excessively supplied yarn is sucked by negative pressure between the position where the resistance is applied and the supply roller. The yarn is sucked in by the flow to form a retained yarn path, then the resistance is released from the yarn, and the retained yarn path is advanced by the ejection force of the fluid injection nozzle, and the yarn path of the yarn is returned to the original state. This is a method for producing a fan yarn by changing the yarn supply amount to the fluid injection nozzle.

However, in this method, since the yarns are temporarily over-supplied when the slab is formed, the entanglement of the slab is reduced, and the obtained slab of the fan sea yarn has a form in which a large number of large loops are accumulated. Therefore, the gap between the constituent filaments becomes large. Therefore,
Even if the slab looks thick at the yarn stage, if this yarn is used as a woven fabric, the gap disappears or is reduced due to the suppression of the adjacent warp and weft yarns. There was a problem that the surface effect could not be effectively exhibited on the fabric because of its poor fastness.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and provides a fan yarn having a clear slab portion, good shape robustness, and excellent processing stability. It is a technical subject to provide a manufacturing method.

[0008]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors entangled the entire staying yarn formed by temporarily giving resistance to the running yarn. After that, the inventors arrived at the present invention by discovering that a fan-sea yarn having a clear and tight slab portion can be stably manufactured by performing fluid jet processing and focused heat treatment.

That is, according to the present invention, a multi-filament yarn is supplied at a constant overfeed rate between a supply roller and a take-up roller while performing fluid injection processing by a fluid injection nozzle. A resistor that acts intermittently is provided between the roller and the roller, and when the resistance is applied, the slackened yarn is sucked under negative pressure to form a retained yarn path, and the retained yarn is After injecting compressed air to the base to entangle the staying yarns over almost the entire length, fluid injection processing is performed with a fluid injection nozzle to intermittently form triple parts in the longitudinal direction of the yarns, and then the air swirling nozzle The gist of the present invention is a method for producing a fan yarn, which is characterized in that a heat treatment is performed while the yarn is being swirled.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic process diagram showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the negative pressure suction device in FIG. 1 and 2, multifilament yarn Y ₁
Is supplied from the supply roller 1 at a constant overfeed rate, subjected to fluid injection processing by the fluid injection nozzle 4, and subsequently, the heater 6 and the air swirling nozzle provided between the first take-up roller 5 and the second take-up roller 8. After being heat-treated while turning at 7, it is wound up on a package 9.

In this case, the multifilament yarn Y ₁ is loosened between the resistor 3 and the supply roller 1 due to the resistance imparted by the operation of the resistor 3 acting intermittently. The loose yarns are sucked from the inlet side a and the outlet side c of the negative pressure suction device 2 in which the fluid treatment nozzle 10 is incorporated, and form the yarn paths a, b, and c that stay in a hairpin shape. Next, before or at the same time when the resistance of the resistor 3 is released,
Compressed air is jetted from the fluid introduction hole 11 of the fluid treatment nozzle 10 to the base of the yarn path that has accumulated, and the injection is continued until the entanglement is imparted over the entire length of the hairpin with the base of the accumulated yarn as the base point. A part in the form of a double part protruding from the surface of the strip is obtained. Subsequently, the yarn is subjected to fluid jet processing by the fluid jet nozzle 4 and entangled in a state where the double portion is folded over the running yarn to form a slab portion having a thickness of triple portion and Form loop fluff on the surface.
By repeating such an operation, a yarn having an intermittent slab portion in the longitudinal direction of the yarn is obtained.

However, only by the entanglement of the fluid injection nozzles, the slab portion, that is, the folded three-fold portion becomes an unstable yarn form which is separated in a ridge shape, and in the subsequent step,
There is concern that unwinding may occur or the quality of the fabric obtained from this yarn may deteriorate. The reason for forming the ridge-shaped separated yarn form is that the double portion entangled in the fluid treatment nozzle 10 is supplied to the fluid injection nozzle 4 in a state of being folded over the running yarn to form a triple portion. However, at this time, since the double portion is in a free state, a waviness phenomenon is caused by the fluid disturbing action of the fluid injection nozzle 4, and the double yarn portion is entangled with the running yarn and separated into ridges.

Therefore, in order to eliminate the unstable triple portion, in the present invention, after the yarn is subjected to the fluid jet processing, the yarn is further swirled by the air swirling nozzle 7 and heat-treated by the heater 6. It is necessary to give. The low-twisting of the air swirling nozzle 7 and the heat fixing by the heater 6 tightly bundle the unstable triple portion and reduce the coarse loops that have floated over the entire yarn. Due to the synergistic effect of the focused heat treatment and the fluid jet processing, it is possible to obtain a fan yarn having a clear and tight slab portion in the longitudinal direction of the yarn.

The manufacturing conditions in the present invention differ depending on the length of the slab portion, the frequency of the slab portion, the fineness of the supplied yarn, etc., but the overfeed rate of the multifilament yarn Y ₁ is 10 to 30%, the fluid treatment nozzle. 10 air pressure 3-7kg
/ Cm ² , and the air pressure of the fluid injection nozzle 4 is preferably 5 to 8 kg / cm ² . Further, the time for applying and releasing the resistance of the resistor 3 may be appropriately set according to the intended length of the slab portion and the frequency of the slab portion. Further, during the focused heat treatment by the air swirling nozzle 7 and the heater 6, it is preferable that the yarn is over-supplied in a range that does not cause slack, and the overfeed rate is particularly preferably 0 to 8%. It is preferable that the air pressure of the air swirling nozzle 7 is 1 to 5 kg / cm ² , and the temperature of the heater 6 is high within the range where the yarns are not fused.

Next, FIG. 3 is a schematic process diagram showing another embodiment of the present invention. In FIG. 3, the two multifilament yarns Y ₁ and Y ₂ are supplied to the fluid injection nozzle 4 by the supply rollers 1 and 12, and after being subjected to the fluid injection processing,
Focusing heat treatment is performed by the heater 6 and the air swirling nozzle 7, and the wound heat is wound onto the package 9 via the second take-up roller 8. Here, the multi-filament yarn Y ₁ is subjected to the same operation as described with reference to FIG. 1 to obtain a double-part yarn protruding to the yarn surface, and then supplied to the fluid injection nozzle 4. It Then, the fluid jetting process is performed together with the other multi-filament yarn Y ₂ inside the fluid jet nozzle 4, and the double portion protruding to the yarn surface is mixed and entangled with the yarn Y ₁ and Y ₂ to form the slab portion. It becomes the formed thread. In this case, the overflow Eid rate of the yarn Y _2, and supplied to the fluid injection nozzle 4 and the same or smaller as the yarn Y _1, a double portion projecting yarn surface and the yarn Y _1, Y ₂ It is a yarn that is mixed and entangled to stabilize the unstable slab morphology. Then, this yarn is subjected to heat treatment by the heater 6 while being swirled by the air swirling nozzle 7 as in the case of FIG. 1, so that the slab portion is more firmly focused and the loop fluff of the entire yarn is densified. In this way, a fan yarn that is clear and has excellent form fastness is obtained.

In the present invention, it is important to impart entanglement over substantially the entire length of the yarn forming the yarn paths a, b, and c retained in the hairpin-like shape. When the unentangled part remains in the hairpin-like part. ， The unentangled part gets caught in the yarn outlet side guide of the negative pressure suction device, and the yarn breakage occurs and the processing operability decreases. In order to entangle the staying hairpin-shaped portion over the entire length, the fluid may be ejected until the tip opening of the hairpin-shaped portion passes through the fluid treatment nozzle.

Examples of the multifilament yarns used in the present invention include thermoplastic synthetic fibers obtained from polymers such as polyester and polyamide, and copolymers and blend polymers thereof.

In the present invention, one or two or more yarns may be aligned and used, and two or more yarns having different overfeed rates may be supplied to form a core-sheath structure.

The fluid treatment nozzle used in the present invention may be any interlacing nozzle such as an interlacing nozzle or a Taslan nozzle, and
The fluid ejection nozzle is not particularly limited as long as it is a nozzle capable of forming entanglement and loop fluff. Further, the air swirling nozzle is not particularly limited as long as it can perform false twisting. The intermittent fluid ejection of the fluid treatment nozzle may be controlled by, for example, a solenoid valve, and this solenoid valve can be controlled by an automatic control device using a film, a magnetic tape, a computer, or the like.

In the present invention, the resistor for applying resistance to the yarn may be any device as long as it can apply resistance to the yarn intermittently. Further, the switching between the resistance application and the resistance removal of the resistor can be programmed and controlled by an automatic control device such as a computer, and the length of the slab and the slab section can be controlled by controlling the time of the resistance application and the release. The appearance frequency and the like can be arbitrarily adjusted.

[0022]

EXAMPLES Next, the present invention will be specifically described by way of examples.

Examples 1 to 3 The multifilament yarns are shown in FIG.
According to the process shown in (Example 3), processing was performed under the conditions shown in Table 1 to obtain a fan yarn.

[0024]

[Table 1]

In each of Examples 1 to 3, the processing operability was good, and all of the obtained fan sea yarns had a slab portion which was clear in the longitudinal direction of the yarn and had good form fastness. ， Dense loop fluff was formed on the yarn surface. When these fan yarns were used as wefts and woven by WJL, the yarn unwinding property from the package was good, and the obtained woven fabric was excellent in fan effect.

[0026]

As described above, the present invention makes good use of the characteristics of the fluid treatment nozzle, the resistor, the negative pressure suction device and the fluid injection nozzle and the air swirling nozzle. According to the present invention, Even when a single multi-filament yarn is used as the supply yarn, it is possible to stably and easily manufacture a fan sea yarn having a slab portion which is formed of triple portions and has excellent shape fastness. Densified loop fluff can be formed on the surface of the sea yarn.

[Brief description of drawings]

FIG. 1 is a schematic process drawing showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the negative pressure suction device in FIG.

FIG. 3 is a schematic process diagram showing another embodiment of the present invention.

[Explanation of Codes] Y ₁ , Y ₂ Multifilament yarn 1, 12 Supply roller 2 Negative pressure suction device 3 Resistor 4 Fluid injection nozzle 5 First take-up roller 6 Heater 7 Air swirling nozzle 8 Second take-up roller 9 Package 10 Fluid Processing nozzle 11 Fluid introduction hole

 ─────────────────────────────────────────────────── ─── 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. In a processing method of performing fluid jet processing by a fluid jet nozzle while supplying multifilament yarn between a supply roller and a take-up roller at a constant overfeed rate, a method between the fluid jet nozzle and the supply roller is provided. A resistance element that acts intermittently is provided on the base, and when the resistance is applied, the slackened yarn is sucked under negative pressure to form a retained yarn path, and compressed air is added to the base of the retained yarn. To entangle the staying yarn over almost the entire length, and then perform fluid jetting with a fluid jet nozzle to intermittently form a triple portion in the longitudinal direction of the yarn, and then use an air swirling nozzle to form the yarn. A method for producing a fan yarn, which is characterized in that heat treatment is performed while rotating.