JP3154797B2 - Manufacturing method of composite false twist yarn with dyeing difference - Google Patents

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 spun filament composite false twist yarn utilizing a difference in dyeing.

[0002]

2. Description of the Related Art A method for producing a spun-tone filament composite false twist yarn utilizing a difference in dyeing is disclosed, for example, in Japanese Patent Publication No. 61-31216.
Japanese Patent Application Publication No. 62-31092 discloses a technique for combining yarns having a difference in ionicity and elongation with a false false twist yarn, and a technique for combining the ionic difference and a special complex false twist structure disclosed in Japanese Patent Publication No. 62-31092. Thus, a spun-tone filament composite false twist yarn excellent in both appearance and feeling can be obtained.

[0003]

However, in each case, since the structure of the composite false twisted yarn is a structure in which a sheath yarn is wound around a core yarn, a marbling appearance peculiar to a spun yarn created by a structure in which a single fiber is migrated. Unlike this, it lacked a sense of luxury. Furthermore, the marbled appearance lacked a high-grade appearance due to the uniformity of dyeing properties of the synthetic fiber.

[0004] It is therefore an object of the present invention to provide a method for producing a filament composite false twist yarn having a very high quality and exhibiting a marbling appearance unique to spun yarn.

[0005]

The gist of the present invention is as follows. A thermoplastic filament yarn having an elongation difference of at least 30% is mixed and entangled with a fluid, and thereafter,
A method for producing a composite false-twisted yarn, characterized in that, during the false-twisting, one thermoplastic filament yarn has a constant overfeed ratio and the other thermoplastic filament yarn has an overfeed ratio changed.

[0006]

FIG. 1 is an explanatory view of the principle of the production method for the composite false twisted yarn of the present invention, in which a low elongation thermoplastic filament yarn A (hereinafter referred to as a low elongation yarn A) and a high elongation heat are used. A plastic filament yarn B (hereinafter, referred to as a high elongation yarn B) is separately supplied via a first feed roller 1 and a second feed roller 2 and mixed and entangled by a fluid nozzle 3 to form a composite yarn 4. None, between the first delivery roller 5 and the second delivery roller 6, false twisting is performed by the twisting tool 7 and the heater 8 and immediately wound by the winder 9 or stabilized by the heater 10 to form the third twist. It is wound by a winder 9 via a delivery roller 11.

At this time, the low elongation yarn A is supplied at a fixed overfeed rate (hereinafter, referred to as OFA) arbitrarily set. The high elongation yarn B is supplied while changing the overfeed rate. As shown in FIG.
_A , it may be changed up and down around OF _A as shown in FIG. 3, or as shown in FIG.
It may be changed below F _A. The overfeed ratio is [(the peripheral speed of the first delivery roller 5) − (the peripheral speed of the first feed roller 1 or the peripheral speed of the second feed roller 2)] × 100% / the first delivery roller 5 Expressed as a peripheral speed, the elongation is the elongation at break measured according to JIS1070.

More specifically, FIG. 2 shows a high elongation yarn B
At time t1, the difference between the overfeed rate OF _B and low elongation yarn A overfeed rate OF _A gave the given the △ OF
1, at time t2, it indicates that △ OF2, where △ OF1> △ OF2. Accordingly, at time t1, the difference in apparent elongation between both yarns A and B is apparently equivalent to an increase, and at time t2, the difference in elongation is relatively close to the true difference in elongation between both yarns. In this way, when the composite yarn 4 composed of both yarns having an apparent difference in elongation is false twisted and dyed, the high elongation of the composite yarn at time t1 is relatively high, as is generally known. The yarn is deeply dyed, and the high elongation yarn of the composite yarn at time t2 is lightly dyed.

Similarly, FIG. 3 shows that the difference in elongation between the two yarns A and B increases at time t1, and the difference in elongation decreases at time t2. Accordingly, the high elongation yarn of the composite yarn at the time t1 is relatively dyed, and the high elongation yarn of the composite yarn at the time t2 is lightly dyed. FIG. 4 shows that at time t1, the difference in elongation became relatively close to the true difference in elongation of both yarns A and B, and at time t2 the difference in elongation decreased. Accordingly, in the false twist yarn, the high elongation yarn of the composite yarn at time t1 is relatively dyed, and the high elongation yarn of the composite yarn at time t2 is lightly dyed.

The length of the shade portion is determined by the feeding speed of the high elongation yarn,
The times t1 and t2 are set, and the draw ratio is adjusted at the time of false twisting.
Adjust by setting OF1 and △ OF2.

In order to achieve the present invention, it is necessary that the difference in elongation between the two yarns A and B is at least 30%. In general, when mixed and entangled while giving an overfeed rate to two yarns, complicated migration occurs between the single fibers,
The composite yarn also has a non-uniform entanglement strength between the single fibers. The difference in elongation between the two yarns A and B means that there is a difference in the fiber internal structure, and that there is a difference in dyeing. Therefore,
When the composite yarn 4 of the present invention is false-twisted, some of the single fibers having high elongation are drawn, some are heat-set as they are, and some are thermally contracted. This behavior also appears in the single fibers constituting the low elongation yarn A. As a result, the composite false twist yarn becomes an aggregate of single fibers having uneven dye adsorption, and the resulting composite false twist yarn is not constituted by a simple shade dyeing portion, and has a high-quality span tone. Elongation difference between both yarns A and B is 30%
If it is less than, that is, if the difference in the internal structure of the fiber is small, the effect of the span tone becomes unclear, and the effect appears at 30% or more, and preferably 50% to 150%.

In the above description, as shown in FIGS. 2 to 4, the overfeed ratio OFA of the low elongation yarn _A is fixed and the overfeed ratio OFB of the high elongation yarn _B is changed. to a constant overfeed rate oF _B high elongation yarn B, principle be varied over feed ratio of the low stretch yarn a is exactly the same. That is, this will be described with reference to FIG. 2. As shown in FIG. 2, the high elongation yarn B constituting the composite yarn at the time t1 is largely restrained by the low elongation yarn A and is greatly affected by the drawing action during false twist, and the molecular orientation proceeds. And lightly dyed. Since the high elongation yarn B constituting the composite yarn at time t2 is restricted by the low elongation yarn A, the yarn is hardly subjected to the drawing action at the time of false twisting and is dyed deep. 3 and 4, the same behavior occurs depending on the magnitude of the overfeed rate corresponding to 1OF1 and △ OF2 in FIG.

An apparatus for industrialization utilizing the above principle is
The drive of the first feed roller 1 for adjusting the overfeed ratio of the high elongation yarn B (or the low elongation yarn A) in FIG. The overfeed rate is the first based on the principle of a normal false twisting machine.
The fluid nozzle 3 is set in relation to the delivery roller 5, and a Taslan nozzle having a function of mixing and entanglement with a high overfeed rate is used as the fluid nozzle 3, and the air pressure is appropriately determined according to the fineness of both yarns A and B and the number of filaments. The stretching ratio, the number of false twists, the heater temperature, and the like may be set for the false twisting conditions between the first delivery roller 5 and the winder 9 based on the concept of ordinary false twisting.

The span tone appearance can be obtained by forming the deeply dyed portion and the lightly dyed portion in the length direction of the false twisted yarn by the above-described principle and the manufacturing method. For the purpose of carrying out, a pair of thick
It is preferable that there are 2 to 20 light parts (pulses).
No.

The pulse has a high elongation in FIGS.
High overfeed ratio of yarn B (or low elongation yarn A)
And the low overfeed ratio sectionAh
In this part, the number of pulses (m) is set to one.High
Time to maintain bar feed rate and low over feed rate
Time to keepAre theoretically equal when m = 2,
The length of the lightly dyed part is 25 cm each, and when m = 20, deep dyeing
And the length of the lightly dyed portion is 2.5 cm each.

The length of the former is of the order of the length of the worsted thread, the latter is of the order of the length of the cotton wool, and
The composite false twisted yarn of the present invention is formed into a woven or knitted fabric, and the appearance of the dyed yarn is similar to the yarn spot appearance of the spun yarn.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments.

(Example 1) As a high elongation yarn, a spinning speed of 2 was used.
FIG. 1 shows a polyester undrawn yarn having an elongation of 120% (120 denier / 36 filaments) spun at 800 m / min, and a 30% polyester drawn yarn (60 denier / 36 filaments) used as a low elongation yarn. And processed under the following conditions.

(A) Air entanglement processing nozzle: Taslan nozzle T311 manufactured by Hebaline Co. (B) Overfeed rate of low elongation yarn to Taslan nozzle: 5.0% (C) Overfeed rate difference: ΔOF ₁ = ± 10% ΔOF ₂ = ± 0% (d) Number of pulses (m): 3 (e) Air injection pressure: 4.0 kgf / cm ² (f) Peripheral speed of the second delivery roller: 150 m / min (g) Stretching ratio: 1.00 (h) Twisting tool: friction disk (D / Y = 2.0
74) (1) Temperature of the first heater (8): 180 ° C. (N) Temperature of the second heater (10): 150 ° C. The obtained processed yarn was dyed with a disperse dye at 130 ° C. to obtain a spun yarn. A natural marbling sensation was obtained. Observing the side surface of the processed yarn with a microscope, the densely dyed portion has relatively many single fibers estimated to be high elongation yarn,
In addition, lightly dyed single fibers and dark dyed single fibers of different levels were mixed. In the lightly dyed portion, a relatively large number of single fibers presumed to have a high elongation yarn drawn were present, and lightly dyed single fibers and dark dyed single fibers of different levels were mixed.

(Example 2) The difference between the overfeed ratio of a low elongation yarn to a Taslan nozzle and the overfeed ratio of a high elongation yarn to a Taslan nozzle is represented by ΔOF ₁ = + 12.
%, △ OF ₂ = + 5% Example 1 except for changing to + 5%
When processed under the same conditions as described above, dyed, and observed with a microscope, the proportion of the low elongation yarn in the outer layer portion was reduced as compared with Example 1, but due to the change in the overfeed amount of the high elongation yarn, the core was changed. Due to the difference in dyeing of the single fiber depending on the degree of migration with the yarn, a natural marbling-like dyeing feeling like a spun yarn was obtained.

(Example 3) The difference between the overfeed ratio of a low elongation yarn to a Taslan nozzle and the overfeed ratio of a high elongation yarn to a Taslan nozzle is represented by ΔOF ₁ = + 5.
%, ΔOF ₂ = ± 0%
When processed and dyed under the same conditions as in Example 1 and observed with a microscope, the proportion of low elongation yarns present in the outer layer increased compared to Example 1, and a natural feeling of marbling like spun yarns was observed. Obtained.

(Example 4) The difference between the overfeed ratio of the high elongation yarn to the Taslan nozzle and the overfeed ratio of the low elongation yarn to the Taslan nozzle is represented by ΔOF ₁ = + 10
%, ΔOF ₂ = ± 0%, and processed under the same conditions as in Example 1 except that the overfeed rate of the high elongation yarn to the Taslan nozzle was changed to + 1%, dyed, and observed with a microscope. Even by changing the overfeed rate of the low elongation yarn to the Taslan nozzle, a natural feeling of marbling like a spun yarn similar to that in Example 1 was obtained.

(Comparative Example 1) Processing was performed under the same conditions as in Example 1 except that the number of pulses was changed to m = 1, dyed, and observed with a microscope. Although it was present in the part, it was streaky due to its long cycle, and did not have a natural dyed spot like spun yarn.

[0025]

As is apparent from the above description, according to the method for producing a composite false twisted yarn of the present invention, a yarn structure in which a single fiber found in a spun yarn has migrated is obtained, and the dyeability between the single fibers is not uniform. Become. As a result, the composite false twisted yarn obtained by the production method of the present invention has a marbling appearance and is extremely rich.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the manufacturing principle of the present invention.

FIG. 2 is an explanatory diagram showing an example of adjusting an overfeed rate according to the present invention.

FIG. 3 is an explanatory diagram showing another example of the overfeed ratio adjustment of the present invention.

FIG. 4 is an explanatory diagram showing still another example of the overfeed ratio adjustment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st feed roller 2 2nd feed roller 3 Fluid nozzle 4 Composite thread 5 1st delivery roller 6 2nd delivery roller 7 Twisting tool 8 Heater 9 Winder 10 Heater 11 3rd delivery roller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D02G 1/02 D02G 3/04

Claims (1)

(57) [Claims] 1. A method in which a thermoplastic filament yarn having an elongation difference of at least 30% is mixed and entangled with a fluid, and then, during false twisting, one thermoplastic filament yarn is supplied at a constant overfeed rate and the other is supplied. A method for producing a composite false twisted yarn having a dyeing difference, wherein the thermoplastic filament yarn is supplied while changing the overfeed rate of the thermoplastic filament yarn.