JPS5933691B2 - Manufacturing method of pongee yarn style composite yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for manufacturing a pongee yarn-like composite yarn, and more specifically, the present invention relates to a method for manufacturing a new pongee yarn-like composite yarn, and more specifically, a loop group of filament yarn for the sheath portion is formed by forming a loop group of the filament yarn for the core portion using a negative pressure swirling vortex flow. A novel method for obtaining a pongee yarn-like composite yarn having a shape change in the longitudinal direction by intermittently changing the supply amount of sheath filament yarn when forming a composite yarn by entangling the peripheral surface in a heated state. The aim is to provide a manufacturing method.

Many efforts have been made to provide woven and knitted fabrics with an attractive appearance and texture.

Incidentally, one example of such fabrics is known, such as shantung fabrics, which are woven using threads with partially different thicknesses and shapes. It has a rich, ornate, and sometimes rustic appearance and is in great demand.

Therefore, in the case of spun yarn, yarns with partially different thicknesses and shapes are generally called slub yarns or variable yarns, and only the portions where the yarns are formed during the spinning process have a large number of fibers. This can be achieved by making changes to the process, but requires complex technology or equipment.

In addition, when using filament yarns, there are so-called decorative yarns made by intertwisting using a design twisting machine, but it is difficult to make filament yarns with fine fineness and requires complicated slab and nep forming equipment. The sex is also low.

There are also methods that use compressed fluid to force yarn agitation or loose entanglement, but the fluid device has a complicated structure and there are many problems in obtaining stable yarn quality. .

As described above, the conventional method requires complicated equipment and expensive equipment costs, and it is extremely difficult to freely control the length, size, frequency of knots, etc. of knots, especially for fine-grained yarns. Met.

As a result of intensive studies to improve the above-mentioned conventional drawbacks, the present inventors have arrived at the present invention, which utilizes a negative pressure swirling vortex flow. When forming a composite yarn by running the core yarn and excessively supplying the sheath filament yarn from the air inlet hole provided in the tangential direction of the inner peripheral surface of the cylinder, the sheath filament yarn is By changing the supply amount intermittently, the rotating loop group of the excessively supplied filament yarn for the sheath part is removed by the action of the negative pressure swirling vortex flow at the tip of the hollow cone provided in the cylinder. A method for producing a pongee yarn-like composite yarn is characterized in that the loops are formed intermittently and, at the same time, the loops are heated and entangled with the circumferential surface of a core yarn running inside a hollow cone.

That is, the method of the present invention specifically involves intermittently changing the amount of excess supply of sheath filament thread through an air inflow hole provided in the tangential direction of the inner circumferential surface of the cylinder, which is brought into a negative pressure state by suction. Then, by the action of a negative pressure swirling vortex flow at the tip of a hollow cone provided at the center of the cylinder, a group of minute loops of the excessively supplied portion of the sheath filament thread is formed, and at the same time, Due to the negative pressure swirling eddy current action, the loops are entangled and coated in a heated state on the circumferential surface of the core yarn running inside the hollow cone to form knots of the composite yarn, and one side for the sheath. By making the feeding speed of the filament yarn the same as that of the core yarn, a flat portion of the composite yarn is formed to obtain the desired pongee yarn-like composite yarn. Therefore, according to the present invention, Since the excessively supplied part of the filament thread for the sheath part is tightly wound into the shape of a thread for the core part, there is no change in the shape of the sheath part when it is ironed by a guide, etc., and it is also easy to pass through the subsequent process. Although there were no problems, an elegant pongee yarn-like composite yarn with the excellent luster of filament yarn was obtained.However, except for the friction body of the gate tensor for intermittent supply, high-speed negative pressure swirling vortex flow due to suction was obtained. Since only the material is used effectively, there is no mechanical wear and tear, and it is possible to economically and stably manufacture the desired pongee yarn-like composite yarn with high productivity.

Next, the present invention will be explained in detail with reference to the illustrated example. FIG. The sown core yarn 2 passes through the yarn introduction hole 5 of the swirling swirl tube 12 connected to the yarn guide 3, the tension adjustment device 4, and the negative pressure source 13, and is passed along the central axis of the swirl swirl tube 12. Run.

Separately, the sheath filament yarn 7 unwound from the yarn supplying body 6 passes through a gate tensor consisting of a yarn guide 8, a movable friction body 9 and a fixed friction body 10 provided to change the supply amount. The swirling vortex tube 12 passes through the air inflow hole 11 provided in the tangential direction of the inner wall surface of the swirling vortex tube 12.
There is an intermittent oversupply within the country.

The sheath filament yarn 7 thus supplied into the swirling vortex tube 12 is heated and entangled on the circumferential surface of the core yarn 2 by the action of the negative pressure swirling vortex to form a pongee yarn-like composite yarn. 14, and is rolled up as cheese 16 by a winding device through a pull-out hole 15.

Therefore, to explain the formation of the pongee yarn-like composite yarn 14, FIG. 2A shows a vertical side view and a cross-sectional view of the swirling swirl tube 12 in FIG. 1, respectively.

First, we will explain the generation of negative pressure swirling vortex flow.
The swirling vortex flow is obtained by bringing the swirling vortex tube 12 into a negative pressure state so that air flows into the swirling vortex tube 12 through the air inflow holes 11 provided in the tangential direction of the inner wall surface thereof.

Therefore, if the filament yarn 7 for the sheath section is introduced into the suction airflow from the air inflow hole 11 in excess of 2 to 10 times the amount of the filament yarn 7 for the core section compared to the yarn yarn 2 for the core section, and is supplied into the swirling vortex tube 12 (gate tensor is not operating), slack occurs within the swirling vortex tube 12, and in addition, a loop 19 is continuously generated due to the action of the negative pressure swirling vortex.

These loop groups further form a conical body 17 provided at the center of the swirling vortex tube 12 due to the effect of the negative pressure swirling vortex flow.
It is continuously entangled in a heated state around the core yarn 2 at its tip to form knots in the pongee yarn-like composite yarn 14.

In this case, since the shape of the hollow body is conical like the conical body 17, turbulence of the swirling vortex flow does not occur at the tip, and the excessively supplied sheath filament yarn 7 is not disposed at the tip. Since the thread moves smoothly to the entanglement point, the loop group is stably formed and the loop group is firmly entangled with the core yarn.

On the other hand, if the gate tensor is operated and the sheath filament yarn 7 is fed at the same speed as the core yarn 2, the sheath filament yarn forms a loop and the sheath filament yarn and the core It is not intertwined with the yarn used, forming a flat, thin warp portion of the pongee yarn-like composite yarn.

Therefore, by intermittently changing the supply amount of the sheath filament yarn in this manner, a pongee yarn-like composite yarn having a shape change in the longitudinal direction as shown in FIG. 3 can be obtained.

Note that the gate tensor made of the combination of the movable friction body 9 and the fixed friction body 10 can be instantaneously acted upon by electromagnetic or mechanical operation to rapidly change the supply amount of the sheath filament yarn. Therefore, it is possible to easily obtain pongee yarn-like composite yarns with variable yarn diameters.

Therefore, by appropriately selecting the operating time of the gate tensor, it is possible to freely control the length, size, and frequency of knots, especially in fine-grained yarns. Moreover, it can be manufactured with high productivity.

The present invention has the above configuration, and according to the present invention, the loop group of the sheath filament yarn is entangled with the circumferential surface of the core yarn in a heated state using negative pressure swirling vortex flow. When forming a composite yarn by intermittently changing the amount of filament yarn supplied for the sheath portion, it is possible to easily obtain a pongee yarn-like composite yarn with excellent properties that has a shape change in the longitudinal direction. Moreover, the loop group is stably formed by the action of the hollow cone, and the loop group is firmly entangled with the core yarn, so that the morphological stability of the resulting composite yarn is significantly improved. It produces exceptional effects such as

EXAMPLES Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples.

Example 1 Using the apparatus shown in FIG. 1, the core yarn 2 was made of poly IJ ester filament yarn 150d/30f, and the tension of the yarn was adjusted using the tension adjustment device 4 to adjust the tension of the 5011 pongee yarn-like composite yarn 14. The winding speed was set to 90 m/min, the negative pressure inside the swirling vortex cylinder 12 by the negative pressure source 13 was set to 2500 mm water column, and the filament yarn 7 for the sheath part was made of polyester filament yarn 50 d/60 f. The gate tensor used to supply yarn intermittently uses an electromagnetically operated friction body.
The operating time of the friction body was randomly varied in the range of 2 to 10 seconds.

- The release time of the friction body to develop knots in the blade axis light wind composite yarn was approximately 0.02 seconds.

When a pongee yarn-like composite yarn was produced under these conditions, the desired pongee yarn-like composite yarn with excellent appearance could be obtained with good stability and high productivity.

In addition, other manufacturing conditions, yarn quality, and yarn form are as described in Table 1 at the end.

Next, polyester filament thread 75d/36 was used as the warp.
f, woven using the pongee thread-like composite yarn for the weft, warp density 70 threads/2.54 m, weft density 80 threads/2.54 Cr
When finished to fL, an elegant fabric with an excellent appearance, luster, and texture that is almost the same as natural silk shantung was obtained.

Example 2 Using the apparatus shown in FIG. 1, a polyester filament yarn of 150 d/30 f was used as the core yarn 2, and the tension of the yarn was adjusted to 50 g with the tension adjustment device 4, and the pongee yarn-like composite yarn 14 The winding speed was set to 90 m/min, and the negative pressure inside the swirling vortex tube 12 by the negative pressure source 13 was set to 2500 m/min.
d/26 f was used, a mechanically operated friction body was used as a gate tensor for intermittently feeding the yarn, and the operating time of the friction body was periodically varied at 10 second intervals.

- The release time of the friction body to develop knots in the blade axis light wind composite yarn was approximately 0.03 seconds.

When a pongee yarn-like composite yarn was produced under these conditions, the desired pongee yarn-like composite yarn with excellent appearance could be obtained with good stability and high productivity.

In addition, other manufacturing conditions, yarn quality, and yarn form are as described in Table 1.

Next, polyester filament thread 75d/36 was used as the warp.
Woven using the above-mentioned pongee thread-like composite yarn as f1 weft, warp density 70/2.54'cm, weft density 80/2.5
When 4CIrL was finished, an elegant fabric with a pattern in which the knots were evenly distributed and an excellent appearance, luster, and texture was obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a state in which a pongee yarn-like composite yarn is manufactured by implementing the present invention, and FIG. The opening shows an example of the swirling vortex tube in FIG. 1, A is a vertical side view thereof, the opening is a cross-sectional view thereof, and FIG. It is a diagram. In the figure, 2 is a core yarn, 7 is a filament yarn for a sheath, 9.10 is a friction body, 11 is an air inflow hole, 12 is a swirling vortex tube, 13 is a negative pressure source, and 14 is a pongee thread wind composite Indicates yarn.

Claims (1)

[Claims] 1. A core yarn is run in a cylinder that is brought into a negative pressure state by suction, and an excessive amount of sheath filament yarn is supplied from an air inflow hole provided in the tangential direction of the inner peripheral surface of the cylinder to form a composite yarn. When forming the sheath, by intermittently changing the amount of filament yarn supplied for the sheath, the excessively supplied sheath is removed by the action of a negative pressure swirling vortex at the tip of the hollow cone provided in the cylinder. A pongee yarn characterized in that rotating loop groups of the core filament thread are formed intermittently and, at the same time, the loop groups are heated and entangled with the circumferential surface of the core thread running inside the hollow cone. Method for manufacturing wind composite yarn.