JPH07109633A - Production of unique conjugate bulky yarn - Google Patents

Abstract

PURPOSE:To make it possible to provide a conjugate bulky yarn excellent in bulkiness, soft property and collecting property. CONSTITUTION:In producing a conjugate yarn by inserting a thermoplastic yarn B through a guide into a thermoplastic yarn A in twist area between a feed roller in false twist processing and heater in an over feed ratio of the yarn B larger than that of the yarn A to form a loop of the yarn B in untwisting area and successively applying fluid treatment, the distance between the yarn A and the guide is set to <=5cm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses a thermoplastic yarn,
The present invention relates to a method for producing a special composite bulky yarn that is compounded by false twisting and fluid treatment.

[0002]

2. Description of the Related Art Conventionally, a method of forming a loop in a yarn by a composite false twisting process is disclosed in, for example, Japanese Patent Laid-Open No. 58-1973.
No. 26 publication.

[0003]

However, the composite yarn obtained by the proposal in the above publication has a problem that the bulkiness, the softness, and the bundling property are insufficient. An object of the present invention is to solve such problems and obtain a composite bulky yarn excellent in bulkiness, softness, and bundling property.

[0004]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a thermoplastic yarn A in a twisting region between a feed roller and a heater in false twisting with a higher overfeed rate than the yarn A. B is inserted through a guide, the yarn B is formed into a loop in the untwisting region, and when the composite yarn is manufactured by subsequent fluid treatment, the distance between the yarn A and the guide is set to 5 cm or less. There is a special composite bulky yarn manufacturing method.

The present invention will be described below with reference to the drawings. FIG. 1 shows an outline of the processing method of the present invention, in which a thermoplastic yarn A such as polyester fiber (hereinafter referred to as yarn A) is first shown.
When the yarn is supplied from the feed roller (1) to the twisting area and is subjected to false twisting through the first heater (4), a thermoplastic yarn B (hereinafter referred to as yarn B), which is also a polyester fiber, is also referred to as yarn A.
The yarn in the false twist region between the first feed roller (1) and the first heater (4) from the second feed roller (2) through the guide (3) at a higher overfeed rate (hereinafter referred to as OF rate). Insert into Article A and perform false twisting. Continuing,
A fluid nozzle (7) installed between the first delivery roller (6) and the second heater (8) mixes and entangles the fibers by air disturbance in the fluid treatment to form a composite yarn. Furthermore, if necessary,
The yarn is stabilized by the second heater (8) and wound by the winder (10) through the second delivery roller (9).

In the present invention, the OF rate of the yarn A is, in FIG. 1, (the peripheral speed of the first feed roller (1) -the peripheral speed of the first delivery roller (6)) × 100% / first The peripheral speed of the delivery roller (6) and the OF rate of the yarn B are (the peripheral speed of the second feed roller (2) -the peripheral speed of the first delivery roller (6)) x 100% / the first deli It is represented by the peripheral speed of the belly roller (6).

In the present invention, O which is larger than that of the yarn A
When the yarn B is inserted into the yarn A in the twisting area through the guide (3) at the F ratio, the yarn B reciprocates with a very small amplitude due to the retroactive twist, and along the longitudinal direction of the yarn A. The yarns A and B are crimped at the same time by false twisting. The yarn B wound around the yarn A is untwisted by the spindle (5), and at the same time, a loop is formed around the yarn A in a crimped state. Thereafter, the yarns A and B are mixed and entangled with each other in the fluid treatment after the first delivery roller (6) for the purpose of improving the processability during the high-order processing and imparting the bulkiness to the yarns. As a result, a bulky composite yarn is obtained.

The morphology of the yarn according to the invention is shown in FIG. However, in the present invention, when the mixed fiber entanglement is not performed in the fluid treatment, as shown in FIG. 3 as a reference diagram, the twist is not completely untwisted, and the twisted state is mixed with SZ, and the focusing property is very poor, The yarn is not bulky. Further, FIG. 4 shows an outline of a processing method in which two yarns are aligned and simultaneously false-twisted without making a supply difference, as a comparative example, and the form of the yarn according to this comparative example is shown in FIG. 5a. The yarn form shown in FIG. 5a has strong entanglement and low bulkiness. FIG. 5b shows the form of the yarn when the mixed fiber entanglement is not performed by the processing method of the comparative example of FIG. 4, and is a crimped yarn state in which two yarns are separated.

In the present invention, the size of the OF ratio of the yarns A and B affects the morphology of the composite yarn and the behavior of the yarn processability, and changes depending on the elongation, fineness and false twist number of the yarn A. However, it becomes as follows. When the (OF ratio of the yarn B-OF ratio of the yarn A) is less than 10%, the degree of mixed fiber entanglement is high and the bulkiness is reduced. Further, (OF rate of yarn B-OF rate of yarn A) is 60.
%, The height of the loop becomes large, the looseness from the winding package deteriorates, and the fastenering when formed into a woven or knitted fabric becomes strong, which is not preferable. Furthermore, the yarn on the yarn A The amplitude of B becomes large, and the yarn becomes a composite yarn having neps and slabs, and the appearance of a woven or knitted product becomes poor.

That is, the yarn form immediately before being mixed and entangled by the fluid treatment is such that the yarn B is wound around the yarn A as shown in FIG. 3 rather than the state where the two yarns are separated as shown in FIG. 5b. In the turned state, a bulky yarn is obtained and sufficient sizing property is also obtained. This is because in the yarn form of FIG. 5b, the filaments are inserted into the fluid nozzle in a state in which they are likely to migrate, so that the entanglement becomes very strong, the bulkiness becomes small, and the texture becomes hard.

Therefore, in the present invention, (OF rate of yarn B-
The OF rate of the yarn A) does not generate nep or slab 10
It is preferably set to 60%. The OF rate of the yarn A itself is selected irrespective of the presence or absence of the yarn B within a range in which the twisting and untwisting tensions that are usually performed during false twisting can be optimized. Although it varies depending on the fineness of the yarn A and the false twist number, the standard for optimization is appropriately selected within a range that does not cause excessive tension or slack such that yarn breakage occurs in the yarn A and the yarn B.

Further, in the present invention, the yarn B is replaced by the yarn A.
The position of the guide (3) for inserting into the guide is the distance between the yarn A and the guide, that is, the first feed roller (1) and the first feed roller (1).
The distance X between the guide (3) and the intersection point P where the yarn B intersects the yarn A at a right angle to the yarn (A) between the heater (4) has a great influence on the bulkiness, bunching property and loop uniformity of the composite yarn. It is necessary to be at a distance X as small as possible rather than given,
When the distance X is 5 cm or less, the bulkiness, bunching property and loop uniformity of the composite yarn are significantly improved. Distance X is 5 cm
When it exceeds, the uniformity of the loop is deteriorated. The reason for this is that when the yarn B is wound around the yarn A, the greater the distance X is,
The vibration of the yarn A makes it difficult to set the focus of the winding point, and the yarn B is unevenly wound along the longitudinal direction of the yarn A. On the contrary, the smaller the distance X, the more uniform the focus of the winding point becomes. It is wound up. Therefore, in the present invention, the yarn A
The distance between the guide and the guide is 5 cm or less, and particularly preferably 1 to 2 cm for forming a dense and uniform loop.

As described above, according to the present invention, the OF rates of the yarn A and the yarn B are made different, and the guide distance is specified to insert the yarn B into the yarn A in the twisting region. Twisted,
When the fibers are mixed and entangled in the subsequent fluid treatment, the composite yarn becomes very bulky, soft, and bundled.

[0014]

[Example] Using an LS-6 type false twisting machine manufactured by Mitsubishi Heavy Industries,
2 polyester stretched yarns (150d / 48f) on yarn A
This line is aligned and used, and yarn B is drawn with a polyester stretched yarn (15
0d / 48f) and polyester drawn yarn (75d / 36)
Spindle speed 12 x 10 using 1 each of f)
4 rpm, false twist number 1200 T / M, first heater temperature /
The temperature of the second heater is 220 ° C / 200 ° C, OF of yarn A
Ratio / OF ratio of yarn B is +2% / + 35%, OF ratio between the second heaters is + 12.5%, T321 manufactured by Heberline Co. is used as a fluid nozzle, and air pressure is 5 kg / cm ²
Under the conditions described above, the yarn B was inserted into the yarn A in the twisting region through the guide with the changed distance, and false twisting and fluid treatment were performed to obtain a composite yarn. When the morphology of the obtained composite yarn was examined, as shown in Table 1, the composite yarn obtained with a guide distance of 5 cm or less reached the object of the present invention.

[Table 1]

In the processing method of the present invention of FIG. 1 and the processing method of the comparative example of FIG. 4, the first heater temperature / second heater temperature is 220 ° C./200° C., and the OF rate between the second heaters is +1.
A composite yarn was obtained by changing the OF rate of the yarn B by changing the false twist number to 2.5% and the air pressure of the fluid nozzle to 5 kg / cm ² . The evaluation results of the obtained composite yarn are shown in Table 2. All of them showed good bulkiness and softness under the conditions of the present invention.

[Table 2]

[0016]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a composite yarn having a dense and uniform loop and a very bulky and soft texture.

[Brief description of drawings]

FIG. 1 is a schematic view of a processing method of the present invention.

FIG. 2 is a diagram showing a yarn form according to the present invention.

FIG. 3 is a reference view showing a yarn form at an intermediate stage in the processing method of the present invention.

FIG. 4 is a schematic view of a processing method of a comparative example.

FIG. 5 is a diagram showing a yarn form according to a comparative example.

[Procedure amendment]

[Submission date] October 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

FIG. 5 is a diagram showing yarn forms a and b according to a comparative example.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Added

[Correction content]

[Explanation of reference numerals] 1st feed roller 2 2nd feed roller 3 guide 4 1st heater 5 spindle 6 1st delivery roller 7 fluid nozzle 8 2nd heater 9 2nd delivery roller 10 winder

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Delete

Claims (1)

[Claims] 1. A thermoplastic yarn B is inserted through a guide into a thermoplastic yarn A in a twisting region between a feed roller and a heater in false twisting at a higher overfeed rate than the yarn A, and a yarn is formed. A process for producing a special composite bulky yarn, characterized in that when the yarn B is formed into a loop in the untwisting region and the composite yarn is produced by subsequent fluid treatment, the distance between the yarn A and the guide is 5 cm or less.