JP3015286B2 - Manufacturing method of metachromatic dyed yarn - 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 metachromatic dyed yarn, and more particularly, to a method for producing a bright white, long contrast pitch, hemp-like structure. .

[0002]

2. Description of the Related Art It is very difficult to produce a processed yarn having a sharp white, long contrast pitch, and a structure similar to spun hemp. Heretofore, a method has been adopted in which an effect similar to a natural color tone is exerted on a processed yarn by using interlacing (weft-entanglement) processing. However, the textured yarn produced by this method has a slightly dark white color, and a clear white, long-contrast, textured textured yarn could not be expected. In addition, a feather tone white color is raised on the processed yarn by interlace processing. However, in this method, in order to obtain a stable entangled state, a method is generally employed in which a jet stream is blown onto the yarn at a high injection pressure, so that the bulky property is usually extremely low, and the interlaced portion is narrowed to tie the fabric. There is a disadvantage that a spot (insect-eating) phenomenon occurs and the product becomes defective. In order to eliminate this tie spot, it is easy to reduce the false twist speed extremely and lower the injection pressure of the injection nozzle during interlacing to obtain a seemingly long contrast pitch. ) And normal tension range during weaving (0.1-0.35g / denier)
Even if you observe, spots where the interlace frays will appear, which will cause dye spotting trouble after dyeing. In addition, the processed yarn manufactured through the above-described interlace processing has low robustness, and when this is used as a warp, the interlaced portion is frayed because the processed yarn itself has a variation in tension. When it is used, it often frays in places where interlaced portions are partially present, resulting in contrast pitch unevenness, and also causes the generation of feathers, which makes commercialization impossible.

Further, in order to eliminate the above-mentioned defects, a crimped yarn having a different color effect is singly or two or more yarns are aligned and subjected to a tension treatment at a tension rate of 0 to -2%, and then a fluid entanglement treatment under relaxation. Japanese Patent Application Laid-Open (JP-A) No. 63-92739 discloses a method for producing a hetero-dyeing crimped yarn. However, the contrast pitch of the processed yarn obtained by the present invention is at most in the range of 10 to 25 mm, and it is not possible to obtain a robust entangled processed yarn and increase the pitch length.

Further, Japanese Patent Publication No. 62-57728 discloses that a thick portion of a thick and thin yarn having a thin portion having a birefringence higher than the birefringence of the yarn is pseudo-fused around a highly oriented filament. Alternately have a deeply dyed portion wound in a shape or a fused state, and a lightly dyed portion formed by blossoming and crimping the highly oriented filament yarn while being gently swirled around the thin portion of the thick and thin yarn. At that time, in the flower crimping portion, a hetero-dyed crimped yarn having a dyeing difference such that the highly oriented filament yarn is dyed more densely than the thin portion of the thick and thin yarn is disclosed. The characteristic of this processed yarn is that the above-mentioned fusion wound portion is the deepest dyeing portion, and in the flowering and crimping portion, the dyeing property of the highly oriented filament yarn is maintained higher than the thin portion of the thick and thin yarn,
It is to express a natural appearance effect by mixing three stages of dyeing and coloring phases. However, even in this processed yarn, the structural part is composed of two parts, the fusion wound part and the flowering winding part, so that a different dyeing effect with a long contrast pitch cannot be expected.

[0005]

The problem to be solved by the present invention is to have a sharp white, long contrast pitch (average of 20 mm, longer than 30 mm) and a robust, hemp-like structure. An object of the present invention is to provide a method for producing a metachromatic yarn.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has been described as follows. "Two raw yarns having substantially equal elongation and different fusion temperatures are plied, and a fixed plied yarn is obtained. while feeding at a rate, as high as a stop injection with alternating sand
That is, interlace processing is performed by intermittently blowing a jet stream so that the injection pressure changes, and then false twisting is performed while heating one of the yarns to a temperature at which the other yarn does not fuse. A method for producing a metachromatic dyed yarn. ].

In the present invention, the jetting conditions of the jet stream in the confounding step are as follows: injection pressure: 3 ± 0.5 kg / cm intermittent injection time T: 3.5 sec ≦ T ≦ 4.3 sec (1
(Intermittent injection 14 times) Injection stop time t: 0.03 sec ≤ t ≤ 0.05 sec Processing speed: 50 m / min to 500 m / min, and the conditions in the false twisting process are as follows: 1.3 ≦ DR ≦ 1.7 (2) Heater temperature: 210 ° C. ± 25 ° C. (temperature at which one yarn melts and fuses, but the other yarn does not melt and fuse) (3) Number of false twists ( T / m):

(Equation 2) (In the formula, D1 is the denier of one yarn, D2 is the denier of the other yarn, and DR is the draw ratio.) 0.7 ≦ α
≦ 1.2.

In the present invention, a semi-drawn polyethylene terephthalate yarn having a spinning speed of 2,500 m / min to 3,500 m / min and a denier of 115 to 250 denier can be applied to one of the two yarns. And one other yarn is a cation-dyeable dyeable fiber having a spinning speed of 2,500 m / min to 3,500 m / min and 115 denier to 250 denier (CD POY (cation POY), which is the original yarn of the present invention) The same general cation as CD POY of JP-A-3-199444
Dyeable dyeable fiber raw yarn) A semi-drawn yarn can be applied. In that case, the heater temperature in the false twisting process is
The temperature at which the semi-drawn yarn of the cationic dyeable dyeable fiber is melt-fused, but the temperature at which the semi-drawn yarn of polyethylene terephthalate is not melt-fused is selected.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a processing step diagram of a method for producing a heterochromatic processed yarn of the present invention. First,
Spinning speed 2,500 m / min-3,500 m /
min, 115 denier to 250 denier polyethylene terephthalate half drawn yarn and spinning speed 2.5
00m / min-3,500m / min, 115 denier-25
Raw yarns 12 made of 0 denier cationic dyeable dyeable fiber semi-drawn yarns are simultaneously twined by rollers 21, 21, and then jet air is intermittently jetted from the jet nozzle 3 to the twined yarns. Perform confounding processing. The injection nozzle 3 opens and closes intermittently under the control of the electromagnetic valve 31. The intake pipe of the injection nozzle 3 is connected to an air supply pipe of an air compressor 32 via an electromagnetic valve 31, and compressed air is sent to the injection nozzle 3 when the electromagnetic valve 31 is open.

The opening and closing operation of the solenoid valve 31 is performed by a computer 33.
The IC circuit operates in response to the command of the electromagnetic valve opening / closing operation signal software mounted on the controller, and the electromagnetic valve 31 performs intermittent opening / closing operation by changing the jet airflow injection time and the injection stop time according to the processing speed. .

Here, the intermittent injection of the jet stream is performed under the following conditions. (Injection condition of jet stream) Injection pressure: 3 ± 0.5 kg / cm Intermittent injection time T: 3.5 sec ≦ T ≦ 4.3 sec (1
Injection stop time t: 0.03 sec ≤ t ≤ 0.05 sec Processing speed: 50 m / min-500 m / min

When the supply of compressed air is intermittently stopped for a short period of time in the entanglement process, the atmospheric pressure of the yarn decreases when the supply of the compressed air stops, and the atmospheric pressure changes with time. Where the pressure is high, a portion with a high degree of entanglement is formed, while a portion with a low pressure forms a portion with a low degree of entanglement. FIG. 2 shows the entangled processed yarn 1. In the figure, 1a indicates a portion with a high degree of confounding, while 1b
Indicates a portion with a low degree of confounding.

[0013] By alternately operating the injection time and the injection stop time, the length in which white is raised on the processed yarn is revealed. That is, at the time of injection, a fused state 1a appears as shown in FIG. 2, and at the time of injection stop, a state of exhibiting a relaxed bulge as shown at 1b in FIG. Then, the stretching is performed within the range of the degree of stretching of the original yarn of 1.3 ≦ DR ≦ 1.7. Since the number of false twists depends on conditions such as the false twist temperature, a clear long white contrast pitch effect can be obtained by setting the purpose and effect achieved by the present invention as a basis.

The entangled processed yarn passes between the feed rollers 22, and enters the heater 4, where it is heated. Then, it is sent to the false twisting machine 5, where it is false twisted under the following conditions. (Conditions of false twisting) (1) Drawing ratio of false twister DR: 1.3 ≦ DR ≦ 1.7 (2) Heater temperature: 210 ° C. ± 25 ° C. (The temperature at which the polyethylene terephthalate semi-drawn yarn does not melt and fuse.) (3) Number of false twists (T / m):

(Equation 3) (In the formula, D1 is the denier of the raw yarn 11, D2 is the denier of the raw yarn 12, and DR is the draw ratio.) 0.7 ≦ α ≦
1.2

When the false twisting temperature is given to the ply yarn by the heater 4, the raw yarn 12 melts and fuses to form a core yarn. On the other hand, the raw yarn 11 has a heater temperature equal to or lower than the melting fusion temperature.
Because it is not fused, a bulky sheath yarn is formed. FIG.
Indicates a processed yarn that has undergone the entanglement step and the false twisting step.

After the above-described false twisting, the sheet is pulled by the feed roller 23, sent to a winding device, and wound on a bobbin.

In the present invention, the finished yarn obtained by subjecting the raw yarn 11 and the raw yarn 12 to interlace processing is intermittently applied with an injection pressure by an injection nozzle, and the portion to which the injection pressure is applied is in an interlaced state. Are formed, and the portion not subjected to the injection pressure is in a relaxed entangled state. It performed this way injection and the injection stop alternately and performed each time the control while entangling treatment, cation if obtained long alterations contrast pitch, then subjected to a false twisting process to yarn Senshokuka The dyeable fiber becomes a fused core yarn,
The fused core yarn imparts robustness to the processed yarn, while the semi-drawn polyethylene terephthalate yarn forms a sheath yarn having a bulky appearance, resulting in a processed yarn having a hemp-like appearance.

When the processed yarn formed through the above-mentioned entanglement and false twisting steps is dyed, a vivid white feather pattern with a long contrast pitch appears. The average length of the contrast pitch is 520 mm to 30 mm or more.

[0019]

As described above in detail, according to the present invention, it is possible to produce a processed yarn having a long, bright white contrast pitch and a natural hemp appearance. The processed yarn obtained by the present invention is excellent in robustness, bulkiness, and free from defects such as a tie spot phenomenon. Since the fused core yarn is mainly obtained by intermittent injection and adjustment of the false twisting temperature during the false twisting work,
The cation-dyeable dyeable fiber original fiber is fused, and furthermore, by stopping the injection at the time of processing, the processed yarn at the portion where the injection is stopped exhibits a clear long pattern of white contrast pitch which is not entangled.

[Brief description of the drawings]

FIG. 1 is a processing step diagram of a method for producing a heterochromatic yarn according to the present invention.

FIG. 2 is a schematic view of a processed yarn after a entanglement step in the production method of the present invention.

FIG. 3 is a schematic view of a processed yarn after a entanglement and false twisting steps in the production method of the present invention.

[Explanation of symbols]

 11,12 Raw yarn 21,22,23 Roller 3 Injection nozzle 31 Solenoid valve 32 Air compressor 33 Computer 4 Heater 5 False twisting machine 1 Work yarn 1a Highly entangled portion 1b Low entangled portion

Claims (3)

(57) [Claims] (1) elongation is approximately equal, fusing temperatures are different,
A jet stream is intermittently blown so that the high pressure and the injection stop alternately, that is, the injection pressure changes, while the two original yarns are combined and sent at a constant speed. A method for producing a hetero-dyed textured yarn, wherein the false twisting is performed while heating at a temperature at which one yarn is fused but the other yarn is not fused. 2. An injection condition of the jet stream in the confounding step is as follows: injection pressure: 3 ± 0.5 kg / cm intermittent injection time T: 3.5 sec ≦ T ≦ 4.3 sec (1
(Intermittent injection 14 times) Injection stop time t: 0.03 sec ≤ t ≤ 0.05 sec Processing speed: 50 m / min to 500 m / min, and the conditions in the false twisting process are as follows: 1.3 ≦ DR ≦ 1.7 (2) Heater temperature: 210 ° C. ± 25 ° C. (temperature at which one yarn melts and fuses, but the other yarn does not melt and fuse) (3) Number of false twists ( T / m): (In the formula, D1 is the denier of one yarn, D2 is the denier of the other yarn, and DR is the draw ratio.) 0.7 ≦ α
The method according to claim 1, wherein ≤ 1.2. 3. One of the two yarns has a spinning speed of 2,500 m / mi.
n to 3,500 m / min, 115 denier to 250 denier, a polyethylene terephthalate semi-drawn yarn, and one other yarn is 2,500 m / min to 3,500 m / min for spinning speed.
A 15 denier to 250 denier cationic dye dyeable fiber <br/>維半drawn yarn, the heater temperature in the false twisting step is cation
The method according to claim 1, wherein a temperature at which the on-dyed dyeable fiber semi-drawn yarn is melt-fused but the polyethylene terephthalate semi-drawn yarn is not melt-fused is selected.