JPH05186927A - Production of bulky interlaced polyester yarn - Google Patents

Abstract

PURPOSE:To obtain at a lower cost in high stability high-quality bulky interlaced polyester yarns excellent in form robustness, with extremely low scum build-up inside and around a turbulent fluid treatment nozzle. CONSTITUTION:(A) Yarns A obtained by putting highly oriented undrawn polyester yarns to crimping and (B) yarns B obtained by heat treatment of the same kind of highly oriented undrawn polyester yarns are simultaneously subjected to turbulent fluid treatment to produce looped fluffs. The heat treatment of the yarns B is carried out at high temperatures in a short time; subsequently to this process, the yarns B is put to water feed treatment and supplied into a turbulent fluid jet nozzle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polyester bulky entangled yarn in which a crimped yarn and a heat-treated yarn are subjected to a fluid disturbing treatment to form loops and slack.

[0002]

2. Description of the Related Art Conventionally, many methods have been proposed for producing a bulky textured yarn by combining false twisting technology and fluid disturbance processing technology. Among them, a false twisting method is used as a method for producing a textured yarn to obtain a woven or knitted fabric having high form fastness against external force such as tension or stress during weaving and knitting, and excellent in tension, waist and warmth. A method has been proposed in which a composite entangled yarn is produced by subjecting a fluid disturbing treatment to a crimped yarn and a multifilament yarn. For example, Japanese Patent Laid-Open No. 63-165550 discloses a bulky yarn in which false twisted yarns are used as sheath yarns and other multifilament yarns are used as core yarns in a fluid disturbing region to form loops and slack. A method of manufacturing a textured yarn is disclosed.

Since this method uses crimped yarns and multifilament yarns, crimped crimped yarns have relatively good openability in fluid disturbing treatment, but do not have crimps. Since the multifilament yarn has an oil agent, twist (in the case of stretched yarn), etc., it has a good yarn converging property and is difficult to open in the fluid disturbing nozzle. It had the drawback of becoming a poorly threaded yarn. In particular, in high-speed processing (500 m / min or more), the entanglement tends to deteriorate, and the yarn flow fluctuates near the outlet of the fluid disturbing nozzle, causing yarn breakage, and other practical problems.

As a method for improving the form of such a poorly entangled yarn, there is a method in which the yarn is treated with water.
Although the entanglement of the yarn is improved by the water supply treatment, scum (mixture of oil agent, oligomer, etc.) adhering to the yarn is easily accumulated around the fluid disturbing nozzle, and nozzle clogging occurs, resulting in the entanglement form. It was not possible to continue stable machining for a long period of time, such as a decrease.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks, and the accumulation of scum in and around the fluid disturbance nozzle is extremely small, which enables high productivity and cost reduction. It is a technical object to provide a method for producing a polyester bulky entangled yarn of excellent quality having excellent form fastness.

[0006]

Means for Solving the Problems As a result of intensive studies for solving the above-mentioned problems, the inventors of the present invention instantaneously heat-treat at least the multifilament yarn to be supplied at a high temperature and a high speed, and subsequently perform a water supply treatment. The present inventors have found that the processing operability is stabilized and the morphological robustness of the obtained bulky entangled yarn is improved by applying the fluid disturbance treatment to the present invention, and thus the present invention has been accomplished.

That is, according to the present invention, a yarn A obtained by crimping a polyester highly oriented undrawn yarn and a yarn B obtained by heat-treating a polyester highly oriented undrawn yarn are subjected to fluid disturbance treatment at the same time to form a loop. A method for manufacturing entangled yarns for forming fluffs, wherein the heat treatment of the yarn B is carried out according to the following (1), (2), (3)
The gist of the present invention is to provide a method for producing a polyester bulky entangled yarn, which is characterized in that the yarn B is subjected to a water supply treatment and then supplied to a fluid disturbing jet nozzle under conditions satisfying the formula. (1) 50 ≦ D ≦ 400 (2) 0.1 × 10 ⁻³ D + 0.01 ≦ S ≦ 0.1 × 10 ⁻³ D + 0.10 (3) 0.12D + M ≦ T ≦ 0.75D + 2M D: Fineness of polyester highly oriented undrawn yarn (D) S: heat treatment time (sec) T: heat treatment temperature (° C) M: melting point of polyester highly oriented undrawn yarn (° C)

The present invention will be described in detail below.

First, in the present invention, as one of the yarns A to be supplied to the fluid disturbance treatment area, a yarn obtained by crimping a highly oriented polyester unoriented yarn is used. Since the highly oriented undrawn yarn is crimped to obtain the yarn A, the crimping and the fluid disturbing treatment can be continuously performed at high speed. The crimping method for obtaining the yarn A is not particularly limited as long as it is a processing method suitable for high-speed processing. For example, a simultaneous drawing-stretching false false twisting method or a hot-drawing-heat-pressing crimping method can be used. Etc. are preferably used.

Next, the other yarn B to be supplied to the fluid disturbance treatment area is the polyester highly oriented undrawn yarn described in the above (1),
A condition that satisfies the expressions (2) and (3), that is, a yarn that is heat-treated instantaneously at high temperature is used. By heat-treating polyester highly oriented undrawn yarn at high temperature and instantly,
The oil agent adhering to the yarn can be sublimated and a heat-treated yarn with dimensional stability can be obtained. Thread B is
The heat treatment enhances the fiber opening property in the subsequent fluid disturbing treatment, which enables the formation of loops and entanglements with excellent morphological robustness. Furthermore, the accumulation of scum in the fluid disturbing nozzle is extremely reduced, which is stable in high-speed machining. It is possible to obtain excellent processing operability.

The heat treatment temperature T (° C.) and the heat treatment time S (sec) during the heat treatment must satisfy the above equations (2) and (3). That is, the heat treatment must be performed at a predetermined high temperature for a short time. In this case, the heat treatment time S (s
ec) depends on the fineness. As the range of the fineness D, 50 to 400 d shown in the formula (1) can be used, but a particularly preferable range is 75 to 200 d. If the heat treatment time S (sec) is less than (0.1 × 10 ^-3 D + 0.01), the heating effect is insufficient, the dimensional stability of the yarn after heat treatment is poor, and the In addition to heat treatment unevenness occurring in the longitudinal direction, the oil agent, etc., which is the main component of the scum adhering to the yarn, cannot be sufficiently removed.
When the heat treatment time S (sec) is longer than (0.1 × 10 ^-3 D + 0.10), the yarn is melted and cut during the heat treatment. If the heat treatment temperature T (° C) is less than (0.12D + M), the heating effect is insufficient, the dimensional stability of the yarn after heat treatment is poor, heat treatment unevenness occurs, and the oil agent etc. adhering to the yarn is removed. It cannot be removed sufficiently, and the heat treatment temperature T (℃) is (0.
If it exceeds 75D + 2M), the yarn will melt and cut during heat treatment.

Here, the yarn supply rate during the heat treatment, that is, the relaxation or stretching conditions are not particularly limited, but a range in which the yarn is sufficiently elongated during the heat treatment is preferable. The specific supply rate depends on the birefringence of the supplied yarn. For example, in the case of polyester highly oriented undrawn yarn with a birefringence of 40 × 10 ⁻³ to 80 × 10 ⁻³ , the ratio is 1.3 to It is preferable to heat-treat under a stretching of about 2.0.

As described above, by heat-treating a highly oriented undrawn yarn under specific conditions, a yarn morphology with good dimensional stability is obtained, and the crimped yarn A and the heat-treated continuous By aligning and supplying to the fluid treatment area in the above process, it is possible to perform stable processing without defects such as fluctuations in the unwinding tension of the yarn and defective yarn running in the conventional high-speed processing.

Further, in the present invention, the yarn B which has been heat-treated under a specific condition is subjected to a water supply treatment subsequent to the heat treatment to improve the entanglement in the subsequent fluid disturbing treatment.
That is, the yarn B immediately after being subjected to heat treatment at high temperature and high speed
Since the water supply process is performed, the frictional force between the filaments is reduced due to water adhesion, facilitating the opening of the fiber, improving the entanglement property, and forming a loop having excellent shape robustness. Further, since the oil agent, which is the main component of scum, is sublimated by the heat treatment, even if the water supply process is subsequently performed, the contamination in the fluid disturbing nozzle is small, scum is not accumulated, and the workability is stable. Moreover, since the yarn B is provided with water immediately after being subjected to the high temperature heat treatment, the setting effect by cooling the water is improved, and the yarn has excellent morphological stability, and the yarn A has crimps. The fluid disturbance processing with and becomes stable.
In the present invention, at least the yarn B needs to be subjected to the water supply treatment, but the water adhering to the yarn B is disturbed in the form of a spray in the fluid disturbing nozzle and adheres to the yarn A as well. Since the same effect as when water is supplied is obtained, the frictional force between the two yarns is reduced, the filament openability is improved, and the entanglement is further improved.

In the present invention, the liquid used for the water supply treatment may be water alone, but any liquid may be used as long as it can reduce the frictional force between the filaments and exert a cooling effect, for example, one containing a surfactant.

As described above, by performing the water supply treatment on the yarn B heat-treated under the specific condition in the upstream of the fluid disturbing nozzle, surprisingly, the loop and entanglement forming effect in the fluid disturbing treatment is remarkably improved. At the same time, scum accumulation around the nozzle is extremely reduced.

In the present invention, when performing the fluid disturbance processing,
When the yarn A is supplied in excess of the yarn B, the crimp crimp of the yarn A forms an outer layer, and a good bulky entangled yarn is obtained. The overfeed rate during the fluid disturbance treatment is preferably 10 to 30% for the yarn A and 2 to 8% for the yarn B. Also,
The fluid pressure supplied to the fluid disturbing nozzle is 5 to 10 kg.
/ Cm ² is preferred.

In the present invention, the fluid jet nozzle used for the fluid perturbation treatment is not particularly limited, but it is described in, for example, Japanese Patent Publication No. 34-8969 and Japanese Patent Publication No. 35-1673. A loop forming nozzle is preferred.

Next, one embodiment of the present invention will be described with reference to FIG. In Figure 1, polyester highly oriented undrawn yarn Y
₁ is fed into the friction false twisting area through the feed roller 1 and the heater 2 and is stretched between the feed roller 1 and the stretching roller 4, and at the same time, is heated by the friction false twisting device 3 while being heated by the heater 2. The yarn A is fixed and has crimps.

On the other hand, polyester highly oriented undrawn yarn Y
₂ is a heater 8 between the feed roller 7 and the stretching roller 9.
Is subjected to an instant heat treatment at a high temperature, then passed through the drawing roller 9 and subjected to water supply treatment by the water supply device 10, and then supplied to the fluid disturbing nozzle 5 together with the yarn A and subjected to the entanglement treatment, After the loop fluff is formed on the surface, it is wound on the package 13 by the winding roller 12 via the delivery roller 6. In FIG. 1, 11 is a water supply tank.

FIG. 2 shows an embodiment of the polyester bulky entangled yarn obtained by the present invention, in which a yarn A having crimps composed of monofilaments a ₁ , a ₂ etc. is a sheath portion,
The heat-treated yarn B composed of the single filaments b ₁ , b _{2 and the} like constitutes the core portion.

[0022]

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

Example 1 Highly oriented polyester unoriented yarn 110d having a birefringence of 50 × 10 ⁻³
Using / 36f as the yarns Y ₁ and Y ₂ , crimping, heat treatment and water supply treatment were performed under the conditions shown in Table 1 according to the process shown in FIG. 1, and subsequently the fluid disturbing treatment was performed. Water was used alone for water supply treatment. The properties of the obtained bulky entangled yarn are also shown in Table 1.

[0024]

[Table 1]

As is clear from Table 1, the processed yarns obtained in Nos. 4, 5, 7, 8, 13 and 15 satisfying the conditions of the present invention have the form of a bulky entangled yarn excellent in form fastness. Was there. When the bulky entangled yarn obtained in No. 7 was used as a warp yarn and a weft yarn and woven into a 2/2 twill design, there was no deviation of the loop due to ironing, and the weavability was good. Next, when the obtained woven fabric was subjected to a usual polyester dyeing treatment, a bulky and soft-feeling fabric having an uneven loop was obtained. On the other hand, one or both of the heat treatment time and the heat treatment temperature do not satisfy the present invention No 1, 2, 3, 6,
Nos. 9, 10, 11, 12, 14, and 16 had poor workability, or the obtained entangled yarn had poor entanglement.

[0026]

EFFECTS OF THE INVENTION According to the present invention, even if the yarn A after the heat treatment to be supplied to the fluid disturbing nozzle is subjected to the water supply treatment, scum accumulation in and around the nozzle is extremely small, which results in entanglement. It is possible to obtain a desired bulky entangled yarn stably even in high-speed processing, etc., and to improve productivity and cost reduction, and to obtain a high-quality bulky entangled yarn excellent in form fastness. It can be manufactured.

[Brief description of drawings]

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

FIG. 2 is a schematic view showing one embodiment of a polyester bulky entangled yarn obtained by the present invention.

[Explanation of symbols]

Y ₁ , Y ₂ Highly oriented polyester unoriented yarn 1 Feed roller 2 Heater 3 Friction false twisting device 4,9 Stretching roller 5 Fluid disturbing nozzle 6 Delivery roller 8 Heater 10 Water supply device 11 Water supply tank 12 Winding roller 13 Package

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location D02J 1/00 F 1/22 J D03D 15/00 C 7199-3B

Claims (1)

[Claims] 1. A filament A obtained by crimping a polyester highly oriented undrawn yarn and a yarn B obtained by subjecting a polyester highly oriented undrawn yarn to a heat treatment are simultaneously subjected to fluid disturbance treatment to form loop fluff. A method for manufacturing an entangled yarn, comprising the yarn B
The polyester bulky entanglement characterized in that the heat treatment of No. 1 is performed under the conditions satisfying the following formulas (1), (2), and (3), and then the yarn B is subjected to water supply treatment and supplied to the fluid disturbing injection nozzle. Thread manufacturing method. (1) 50 ≦ D ≦ 400 (2) 0.1 × 10 ⁻³ D + 0.01 ≦ S ≦ 0.1 × 10 ⁻³ D + 0.10 (3) 0.12D + M ≦ T ≦ 0.75D + 2M D: Fineness of polyester highly oriented undrawn yarn (D) S: heat treatment time (sec) T: heat treatment temperature (° C) M: melting point of polyester highly oriented undrawn yarn (° C)