JPS5936685B2 - Manufacturing method of composite string - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a novel composite yarn, and more specifically, the present invention relates to a method for manufacturing a novel composite yarn, and more specifically, a loop group of filament yarn is heated on the circumferential surface of a core yarn by using a negative pressure swirling vortex flow. The present invention relates to a method for producing a light-spun composite yarn having a bulky, elegant luster, and a firm and flexible texture.

Conventionally, in order to obtain a composite yarn consisting of a core and a sheath, a method using a so-called link protection mechanism such as a milling machine or a twisting machine has been generally used. The productivity is extremely low, and when a filament yarn is used in the sheath, only a monotonous filament covering system or loop yarn can be obtained.

In recent years, so-called spunlike processing, which mainly targets filament yarns and obtains yarns with spun light tone from filament yarn force by using fluids and other effects, has improved productivity and created new yarns. Various methods have been proposed for this purpose, but the conventional spunlike processing methods lack bulkiness, and the biggest drawback is that the fibers that make up the yarn It is not possible to apply a heating effect without using LINK'7IUa, and therefore, in the non-twisted state, there was an essential defect that only a so-called paper-like texture could be obtained, which lacked stiffness and bulk. .

The inventors of the present invention, while conducting studies to improve the above-mentioned conventional drawbacks, discovered that the desired objective could be achieved by utilizing negative pressure swirling vortex flow, and as a result of further intensive study, they arrived at the present invention. The gist of this is that the core yarn is run through a cylindrical body that is brought into a negative pressure state by suction, and the sheath filament yarn is passed through an air inflow hole provided in the tangential direction of the circumferential surface of the cylinder. When oversupplying to form a composite yarn, the sheath filament yarn is supplied so as to be located in the conical part of a hollow cone provided in the cylinder, and a negative pressure swirling vortex is generated at the tip of the hollow cone. A composite yarn is characterized in that a loop group is formed by excessively supplied sheath filament yarn around a core yarn running inside a hollow cone by action, and at the same time, they are entangled in a heated state. Production method.

Next, the present invention will be explained in detail using illustrated examples.

FIG. 1 is a perspective view showing an example of a state in which a composite yarn according to the present invention is manufactured. It travels along the central axis of the swirling vortex tube 12 via the thread introduction hole 5 of the swirling tube 12 which is connected to the regulating device 4 and the negative pressure source 13 .

Separately, the sheath-forming yarn 7 unwound from the yarn feeder 6 passes through a yarn guide 8, a traverse guide 9, and a delivery roller 10, and is provided in the tangential direction of the inner wall surface of the swirling swirl tube 12. The swirling vortex tube 1 passes through the air inflow hole 11
Supplied within 2 days.

The core forming yarn 2 and the sheath forming yarn 7 thus supplied into the swirling vortex tube 12 are heated and entangled by the action of the negative pressure swirling vortex to become a composite yarn 14, which is then drawn out. It passes through the hole 15 and is rolled up as cheese 16 by a rolling device.

Therefore, the formation of the composite yarn 14 will be explained as follows.
FIG. 2A5 illustrates a longitudinal sectional side view and a cross sectional view of the swirling vortex tube 12 in FIG. 1, respectively.

Since the negative pressure swirling vortex is the most important element in carrying out the present invention, an example of this generating means will be explained first.The swirling vortex tube 12 illustrated in FIG. By creating a pressure state, air flows into the swirling vortex tube 12 through the air inflow hole 11 provided in the tangential direction of the inner wall surface, thereby generating a swirling vortex flow.

Therefore, the formation state of the composite yarn 14 will be explained with reference to FIG. 2. The sheath forming yarn 7 is guided from the air inflow hole 11 by the suction airflow to be located in the conical part of the hollow cone 17, and the core As the forming yarn 2 is supplied with an excess of several times that of the forming yarn 2 and enters the swirling vortex tube 12, slack occurs within the swirling vortex tube 12, and in addition, the negative pressure swirling vortex action causes the loop 19 to become continuous. occurs.

These loops are further heated around the core forming thread 2 at the tip of the hollow cone 17 provided at the center of the swirling vortex tube 12 due to the action of the negative pressure swirling vortex. The threads are continuously entangled to form a composite yarn 14, which is taken out through the extraction hole 15.

At this time, since the tip of the hollow cone 17 has a conical shape, the vortex flow inside the swirling vortex tube 12 is stabilized, and the vortex movement is generated in the direction of the tip of the hollow cone 17. It has the effect of smoothly transferring the loop of the sheath forming yarn 7 to the tip of the hollow cone 11, and facilitates heating of the loop group of the sheath forming yarn 7 to the core forming yarn 2. Make it.

As described above, in the present invention, the sheath forming yarn 7 is supplied in excess (overfeed) compared to the core forming yarn 2.
By doing so, a loop group is formed by the generation of slack and the negative pressure swirling vortex action. In this case, the excess supply ratio can be appropriately selected depending on the relationship with the desired loop formation, but it is preferably 2. (200%) or more, more preferably 5 times or more, and in the examples described later, 5 to 10 times
The following is an example of the results obtained using an excess supply ratio selected within a double range.

To further explain the formation of composite yarns, FIG.
A cross-sectional view showing another example of the swirling vortex tube 12 in the figure,
This is an example of a swirling vortex tube in which a plurality of yarns 7 for forming a sheath portion are supplied at the same time.

By supplying a plurality of sheath-forming threads 7 in this manner, a composite thread having a more even external shape can be obtained.

In addition, in the present invention, not only the above-mentioned evenly spun yarn adjustment yarn but also slab adjustment yarn and It is also possible to obtain composite yarns having a wide variety of appearances, such as nip-like yarns.

As shown in Fig. 4, the yarn obtained by the present invention is a spun-like yarn with a bulky and elegant luster, in which a group of loops are firmly entangled in a heated state around the core-forming yarn. It is a composite thread.

According to the present invention configured as described above, a composite yarn having excellent texture and appearance can be rapidly and stably produced through the mutual action of the negative pressure swirling vortex flow and the hollow cone. It is played.

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 The apparatus shown in FIG. 1 was used (the swirl tube 12 shown in FIG. 2 was used), and polyester filament yarns 150d/30f were used as the core forming yarn 2. The tension is set to 70 g by the tension adjustment device 4, the winding speed of the composite yarn 14 is set to 90 m/min, and the swirling vortex tube 12 is controlled by the negative pressure source 13.
The negative pressure inside was set to 2000 mm water column, and the sheath forming yarn 7 was made of polyester filament yarn 50d/60f.
84 to pass the yarn through the feed roller 10 using
When the composite yarn was manufactured by supplying it to the whirlpool vortex tube 12 at a speed of 0 m/min and setting other main conditions as shown in Table 1, the yarn formation was continuous and stable. As a result, microscopic loops appeared in a fluff-like manner.

A balanced composite yarn with a spun yarn appearance was obtained. Next, 75d/36f of polyester filament yarn was used for the warp and the above-mentioned composite yarn was used for the weft, and the weave was woven into a plain weave, with a warp density of 50/36f.
2.54 crrL, weft density 40/2.54 crrL
When finished, a fabric was obtained which was extremely bulky, had an elegant luster, and had a firm and excellent texture, and also had good weavability.

Example 2 A composite yarn was manufactured using the apparatus shown in FIG. 1 (the swirling vortex tube 12 shown in FIG. 2 was used) and the main conditions were set as shown in Table 2.

The yarn formation in this case was carried out continuously and with good stability, and the desired composite yarn was obtained.

Next, when this composite yarn was used as a knitting yarn and knitted into a flat weave at 10 gauge, the knitted fabric had a firm texture, was rich in luster and bulk, and had an excellent appearance. It was obtained with high productivity and no defects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the state in which a composite yarn is manufactured by implementing the present invention, and Fig. 2 A shows an example of the swirling vortex tube in Fig. 1; 3 is a cross-sectional view showing another example of the swirling vortex tube in FIG. 1; FIG. 4 is a cross-sectional view showing an example of the composite yarn obtained by the present invention. It is an external view. In the figure, 2 is a core forming yarn, 7 is a sheath forming yarn, 10 is a delivery roller, 11 is an air inflow hole, 12 is a swirling swirl cylinder, 13 is a negative pressure source, 14 is a composite yarn, 17 is a cone, and 19 is a loop.

Claims (1)

[Claims] 1 The core thread is run in a cylindrical shape under negative pressure by suction, and the sheath filament thread is excessively supplied from the air inlet hole provided in the tangential direction of the periphery of the cylindrical body to form a composite thread. When forming the sheath, the filament yarn for the sheath is supplied so as to be located in the conical part of the hollow cone provided in the cylinder, and the inside of the hollow cone is heated by the action of a negative pressure swirling vortex at the tip of the hollow cone. 1. A method for producing a composite yarn, which comprises forming a loop group with excessively supplied sheath filament yarn around a traveling core yarn, and at the same time entangling them in a heated state.