JPH0892839A - Interlaced nozzle - Google Patents

Abstract

(57) [Summary] [Structure] In an interlaced nozzle having a thin tubular thread passage portion and at least one fluid injection hole Ai opened in the yarn passage portion, one or more yarn passage portions are provided on the yarn inlet side. Of the yarn introduction part Yi and the fluid treatment part Yt continuously provided thereto, and the opening area A of the yarn introduction part Yi on the fluid treatment part side and the yarns of the fluid treatment part Yt adjacent thereto. The opening area ratio B / A represented by the opening area B on the outlet side is 1.5
From the boundary line C between the yarn introducing portion Yi and the fluid treatment portion Yt to the point D where the center line of the fluid injection hole Ai and the center line of the yarn introducing portion Yi intersect, the relationship of ≦ B / A ≦ 30 is satisfied. An interlace nozzle characterized in that the distance a is 0.5 mm or more and 10 mm or less. [Effect] With the interlace nozzle of the present invention, it is possible to obtain a yarn having a large overfeed ratio between the core and the sheath and having excellent uniformity in which the loops are dispersed. Moreover, since many interlaced parts can be provided, a yarn having excellent loop form robustness can be obtained. Further, the manufacturing cost can be kept low by making the nozzle thread part a member.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to interlaced nozzles.

More specifically, it relates to an interlace nozzle capable of stably producing a bulky loop yarn having a spun-like appearance and a peach touch feeling.

[0003]

2. Description of the Related Art Conventionally, a yarn in which interlaced nozzles are entangled with each other by jetting fluid is widely known as an interlaced yarn. These interlaced yarns improve the spinnability in the raw yarn or the processed yarn manufacturing process, or the yarn unwinding failure in the weaving and weaving process,
Since the purpose is to reduce defects such as fluffing and improve workability and productivity, the yarn form has as few loops and slack as possible and has sufficient entanglement, in other words, The important point is how focused it is.

On the other hand, various attempts have been made to obtain loop yarns by subjecting multifilament yarns to fluid processing for the purpose of imparting bulkiness using interlaced nozzles.

However, in the case where a sufficient loop or slack cannot be imparted, or in the case of a multi-thread composite yarn having a core-sheath structure,
It was not possible to give a sufficient difference in yarn length between the core and the sheath.
In order to improve them, there has been proposed a nozzle in which the yarn passage hole is tapered or, for example, as disclosed in Japanese Patent Application Laid-Open No. 3-180536, the fluid injection hole angle is inclined toward the yarn outlet direction. Although it is possible to obtain loops of an appropriate size using these nozzles, the number of loops is smaller than when using turbulent flow processing nozzles (for example, Taslan nozzles), and the texture of the loop yarn is improved when it is woven. It was something that could not be fully demonstrated.

A Taslan nozzle is widely used as a fluid jet nozzle for forming a loop. In these Taslan nozzles, although a sufficient yarn length difference can be imparted between the core and the sheath, in addition to the problem that the nozzle manufacturing cost is high due to the nozzle structure, the processed yarn obtained using this nozzle, so-called Taslan yarn The loop had some drawbacks such as poor shape robustness.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, has a uniform and sufficient loop that contributes to a span-like appearance and a peach touch feeling, and further has a high entanglement between filaments. Therefore, it is an object of the present invention to provide an interlace nozzle capable of stably producing a bulky loop yarn having high form fastness against tension during weaving, that is, having good high-order passing properties.

[0008]

The interlaced nozzle of the present invention has the following constitution in order to solve the above problems.

That is, in an interlaced nozzle having a thin tubular yarn path portion and at least one or more fluid injection holes Ai opened in the yarn path portion, one or more yarn introductions in which the yarn path portion is on the yarn inlet side are introduced. The opening area A on the fluid treatment portion side of the yarn introducing portion Yi and the opening on the yarn outlet side of the fluid treatment portion Yt which is adjacent to the portion Yi and the fluid treatment portion Yt provided continuously from the portion Yi. The opening area ratio B / A represented by the area B satisfies the relationship of 1.5 ≦ B / A ≦ 30, and from the boundary line C between the yarn introducing portion Yi and the fluid treatment portion Yt, the center line of the fluid injection hole Ai. Point D at which the center line of the yarn introduction section Yi intersects
Is a distance a of 0.5 mm or more and 10 mm or less.

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

FIG. 1 is a vertical sectional view of a schematic view showing an example of the interlace nozzle of the present invention, which comprises a yarn introducing section Yi, a fluid processing section Yt, and a fluid injection hole Ai.

In the present invention, in order to enable stable loop formation under a high overfeed rate, the opening area B on the yarn exit side of the fluid treatment section adjacent to the yarn introduction section has a fluid at the yarn introduction section. An opening area ratio B that is larger than the opening area A on the processing section side and is represented by the opening area A on the fluid processing section side of the yarn introducing section Yi and the opening area B on the thread exit side of the fluid processing section Yt adjacent to it. / A satisfies the relationship of 1.5 ≦ B / A ≦ 30. When the opening area ratio B / A is less than 1.5, the yarn path does not have a sudden space expansion, and the opening depends on the physical properties of the yarn, and the opening point becomes unstable. Alternatively, strong entanglement is imparted before forming a loop, and a uniform loop cannot be obtained, so that there is a problem that workability is deteriorated.

If the opening area ratio B / A exceeds 30, the opening area B on the yarn outlet side of the fluid treatment section becomes extremely large and no turbulent flow is formed, so that a loop cannot be obtained, or There is a problem that the opening area A of the yarn introducing section on the side of the fluid treatment section becomes extremely small and the workability such as threading is extremely reduced.

That is, the yarn is allowed to pass through a relatively narrow yarn-like introduction portion in a state where the opening is regulated, and then comes out into a space (fluid treatment portion) where it is rapidly expanded, so that the degree of freedom of the single fiber is increased. Can be opened further. At the same time, the fluid supplied to the fluid processing unit forms a turbulent flow in a relatively wide space, and can promote the loop formation of the opened yarn. On the other hand, yarn paths that do not have a sudden expansion of space (for example,
In a straight yarn path or a tapered yarn path, the opening depends on the physical properties of the thread, and the opening point becomes unstable or a strong entanglement occurs before forming a loop. Is given, and not only a uniform loop cannot be obtained, but also the processing becomes unstable.

Further, in the interlaced nozzle of the present invention, the area of the yarn path is drastically changed, so that the fluid flow as a whole flows in the yarn running direction, and the yarn is supplied to the nozzle at a high overfeed rate. Also in this case, since it is guided to the fluid treatment section without causing slack or accumulation at the nozzle inlet, it is possible to impart a stable and uniform loop to the yarn.

When each monofilament of the multifilament yarn is sufficiently opened, and given some impact, the monofilaments are entangled with each other, and as a result, loops and slack are formed.
That is, the relationship between the fiber opening and the loop formation point is very important in loop formation. There are several things that can be used as shocks.For example, in Taslan nozzles, it is possible to increase the effect of fiber disruption due to the discharge flow caused by a sudden change in the direction of the yarn at the nozzle outlet, and further the effect of the disruption. It is used to provide a collision object.

However, these alone are not sufficient to form a uniform loop.

Therefore, in the present invention, the direct flow of the injection fluid is effectively utilized. That is, the jet flow is directly applied to the opened multifilament yarn to promote the disturbance of the single fibers and increase the number of loops. What is important here is, as shown in FIG.
Boundary line C between the yarn introduction section and the fluid treatment section, which is the opening point
To a point D where the center line of the fluid ejection hole and the center line of the yarn introducing portion intersect.

In the interlaced nozzle of the present invention, the distance a is set to 0.5 mm or more and 10 mm or less. If the distance a is less than 0.5 mm, there is a problem that nep (knot) -shaped entanglement is formed.
When it exceeds 10 mm, there is a problem that a sufficient loop cannot be formed because only normal entanglement can be obtained. The distance a is preferably 1 mm or more and 5 mm or less in order to obtain a better-shaped loop with a normal clothing filament.

When attempting to obtain a loop yarn having a core-sheath structure using a plurality of multifilament yarns, the plurality of yarns are supplied to the nozzle at different speeds.
As the speed difference increases, the interference between the yarns in the nozzle introduction portion increases, which causes a problem of unstable processing. Although the discharge flow of the fluid at the nozzle inlet further promotes this interference, reducing the opening area of the fluid treatment portion of the yarn introducing portion as in the present invention reduces the discharge flow toward the nozzle inlet. It is preferable from the viewpoint of

Further, as shown in FIG.
Providing one or more pieces is preferable from the viewpoint of minimizing the interference between the yarns and stabilizing the yarn running at the nozzle inlet.

That is, even when a very large speed difference is applied between the core-sheath yarns, the filaments of the sheath yarn are sandwiched between the filaments of the core yarn, and the loop having high uniformity is obtained. Can be obtained.

Although the angle of the fluid injection hole is not particularly limited from the viewpoint of obtaining a loop, the injection flow is effectively applied to the yarn to impart an appropriate entanglement to the yarn, and the form robustness of the loop is improved. In order to increase the value, the fluid ejection angle θ formed by the center line l _Y of the yarn introducing portion and the center line l _A of the fluid ejection hole is preferably 50 ° or more and 110 ° or less, as shown in FIG. It is more preferably 70 ° or more and 100 ° or less.

The action of the opening and the direct jet flow described above is not particularly limited to the cross-sectional shape of the yarn path part.

Therefore, it is also preferable that the yarn path portion has a shape in which a part of the yarn path portion is opened to the outside as shown in FIG.

Further, in the case of having a plurality of yarn introducing portions, they may be shaped so as to suppress the interference between the yarns and regulate the opening start point, as shown in FIG. A slit having a large groove is also preferable from the viewpoint of thread hookability.

It is also preferable from the viewpoint of making the loop size small and uniform that the yarn take-up direction at the nozzle outlet is suddenly changed or a colliding object is provided at the nozzle outlet.

[0028]

The present invention will be described in detail below with reference to Examples and Comparative Examples.

The workability of the obtained interlace,
Loop uniformity and entanglement are measured by the following methods.

[Workability] When the vibration width of the sheath yarn at the nozzle inlet is less than 5 mm, it is A, when it is 5 mm or more and less than 10 mm, it is B, and when it is 10 mm or more, it is C.

[Loop uniformity] The degree of dispersion of loops is visually evaluated, and a 5 cm sample is taken at an arbitrary portion of the yarn. One independent loop for each single fiber
The case where there are one or more is A, and the case where there is one or more loops in which 2 to 10 single fibers are collected is B, and whether there is one or more loops in which 10 or more single fibers are collected Let C be the whole nep shape.

[Entanglement] A load of 2 g / d is applied to the yarn,
Tension-relaxation was repeated 5 times, and the number of entanglements per unit length was evaluated. When the number of confounding is 100 / m or more, A is set to 50.
The number B / m or more and less than 100 / m is B, and the number less than 50 / m is C.

As the supply yarn, nylon (50 denier, 40 filament) is used for the core yarn, and nylon (70 denier, 98 filament) is used for the sheath yarn, and fluid injection processing is performed.

The fluid treatment conditions are as follows: core yarn overfeed ratio 5%, sheath yarn overfeed ratio 30.
%, Pressure 5 kg / cm ² , and yarn speed 300 m / min. [Examples 1 and 2] The opening area ratios are 1.7 (Example 1) and 2.9 (Example 2), respectively, the distance a is 3 mm, the fluid ejection angle is 80 degrees, and the number of yarn introducing portions is There are two. In each of Examples 1 and 2, there was no slack at the nozzle inlet, the processability was good, and the obtained loops were highly uniform with each single fiber forming a loop.

The results of the examples are shown in Table 1.

[0036]

[Table 1] [Examples 3 and 4] The opening area ratio is 2.9, the distance a is 1 mm (Example 3) and 9 mm (Example 4), the fluid ejection angle is 80 degrees, and the number of yarn introducing portions is 2. And In each of Examples 3 and 4, each single fiber formed a loop and had a uniform loop as a whole.

The results are also shown in Table 1.

[Embodiments 5 and 6] The opening area ratio is 2.9, the distance a is 3 mm, and the fluid ejection angle is 50.
(Example 5) and 80 degrees (Example 6), and the number of yarn introducing portions was 2 (Example 5) and 1 (Example 6), respectively. In Example 5, the yarn suction force at the nozzle inlet was high, the processing was stable, and the loop was formed uniformly. In Example 6, the loops of the obtained yarn were sufficiently dispersed, and had a natural feeling with moderate unevenness in the yarn length direction.

The results are also shown in Table 1.

[Examples 7 and 8] The opening area ratio was 9.6 (Example 7) and 18.6 (Example 8), and the distance a was 3 m.
m, the fluid ejection angle was 80 degrees, and the number of yarn introducing portions was 2. Both Examples 7 and 8 were excellent in workability and entanglement.

The results are also shown in Table 1.

[Examples 9 and 10] The opening area ratio was set to 26.5.
(Example 9), 29.5 (Example 10), the distance a was 3 mm, the fluid ejection angle was 80 degrees, and the number of yarn introducing portions was two. Both Examples 7 and 8 were excellent in workability.

The results are also shown in Table 1.

[Comparative Example 1] The opening area ratio was 1.2, the distance a was 3 mm, the fluid ejection angle was 80 degrees, and the number of yarn introducing portions was two. Thread loosening occurred at the nozzle inlet and processing was impossible.

The results are shown in Table 2.

[0046]

[Table 2] [Comparative Examples 2 and 3] The opening area ratio is 2.9, the distance a is 0 mm (Comparative Example 2) and 12 mm (Comparative Example 3), the fluid ejection angle is 80 degrees, and the number of yarn introducing portions is 2. I made it into an individual.

In Comparative Examples 2 and 3, yarn loosening occurred at the nozzle inlet, and the processing was unstable.

In addition, the loop shape having a nep-shaped loop was inferior in some places.

The results are also shown in Table 2.

[Comparative Example 4] The opening area ratio was set to 31.0,
The distance a was 3 mm, the fluid ejection angle was 80 degrees, and the number of yarn introducing portions was two. The loop uniformity was poor.

The results are also shown in Table 2.

[Comparative Example 5] The opening area ratio was set to 38.2,
The distance a was 3 mm, the fluid ejection angle was 80 degrees, and the number of yarn introducing portions was two. The loop uniformity and entanglement were poor and the quality was poor.

The results are also shown in Table 2.

[0054]

EFFECT OF THE INVENTION The interlaced nozzle of the present invention makes it possible to obtain a yarn having a high overfeed rate between cores and sheaths and having excellent uniformity in which loops are dispersed.

Further, since many interlaced parts can be provided, it is possible to obtain a yarn in which the loop has excellent form robustness.

Further, the manufacturing cost can be kept low by making the nozzle yarn path member a member.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an example of an interlace nozzle of the present invention.

FIG. 2 is a schematic vertical sectional view showing an example of an interlace nozzle of the present invention.

FIG. 3 is a schematic vertical sectional view showing an example of an interlace nozzle of the present invention.

FIG. 4 is a schematic vertical sectional view showing an example of an interlace nozzle of the present invention.

FIG. 5 is a schematic cross-sectional view showing an example of an interlace nozzle of the present invention.

FIG. 6 is a schematic side view showing an example of an interlace nozzle of the present invention.

[Explanation of symbols]

Yi: Yarn introduction part Yt: Fluid treatment part Ai: Fluid ejection hole A: Opening area of the yarn introduction part on the fluid treatment part side B: Opening area of the fluid treatment part on the yarn exit side l _A : Of the fluid ejection hole Center line l _Y : Center line of yarn introduction part C: Boundary line between yarn introduction part and fluid treatment part D: Center line l _Y of yarn introduction part and center line l _{A of} fluid injection hole
Intersection point a: distance between the boundary line C and the intersection point D θ: center line l _Y of the yarn introduction portion and center line l _{A of the} fluid injection hole
Fluid injection angle formed by

Claims (3)

[Claims] 1. An interlace nozzle having a thin tubular yarn path portion and at least one or more fluid injection holes Ai opened in the yarn path portion, and at least one yarn introduction path in which the yarn path portion is on the yarn inlet side. The opening area A on the fluid treatment portion side of the yarn introducing portion Yi and the opening on the yarn outlet side of the fluid treatment portion Yt which is adjacent to the portion Yi and the fluid treatment portion Yt provided continuously from the portion Yi. The opening area ratio B / A represented by the area B satisfies the relationship of 1.5 ≦ B / A ≦ 30, and the yarn introducing portion Yi
And a distance D from a boundary line C between the fluid treatment section Yt and a point D where the center line of the fluid ejection hole Ai and the center line of the yarn introducing section Yi intersect are 0.5 mm or more and 10 mm or less. Interlaced nozzle. 2. The fluid ejection angle θ formed by the center line l _Y of the yarn introducing portion Yi and the center line l _A of the fluid ejection hole Ai is 50 ° or more 1
The interlaced nozzle according to claim 1, wherein the interlaced nozzle has an angle of 10 ° or less. 3. The interlace nozzle according to claim 1, wherein the yarn path portion has a slit.