KR100903701B1 - Process for producing polyester differential shrinkage blended woven yarn - Google Patents

Abstract

A manufacturing method of polyester air textured yarns having different shrinkage is provided to interlace the yarns with uniform tension by installing a roller on a rear side of a cross connection apparatus. A manufacturing method of polyester air textured yarns having different shrinkage comprises the following steps of: spinning a core yarn and an effect yarn respectively(S1); performing solidification, drawing, and heat treatment on the core yarn(S2); combining the core yarn and the effect yarn with a non-drawn state(S3); transferring the combined the core yarn and the effect yarn into a cross connection apparatus; and interlacing the yarn while maintaining the tension uniformly(S4). The core yarn passes through a heating roller. And the effect yarn passes a non-heating roller.

Description

Manufacturing method of polyester bisqueeze blended yarn {PROCESS FOR PRODUCING POLYESTER DIFFERENTIAL SHRINKAGE BLENDED WOVEN YARN}

The present invention relates to a method for producing a polyester biaxially blended yarn, and in particular, a method for producing a double-shrink blended yarn by simultaneously producing a low shrinkage core core and a high shrinkage effect yarn using a single spinning machine and giving a entanglement. It is about.

Japanese Laid-Open Patent Publication No. 63-235513, which is an invention relating to a method for manufacturing a biaxial horn fiber, using a conventional spin draw spinner, has a core yarn and an effect yarn after passing through separate yarns, respectively, A method of combining core and effect yarns, entangled via an entanglement imparting device, wound up immediately after entanglement, and producing a biaxially woven fiber is disclosed. This method has a disadvantage in that loops are generated even at low temperatures due to vibration or damage because the effect yarn and the core yarn have to be unstable several times in the absence of entanglement in the roller attached to the front end of the entanglement imparting device. When applied, the above problems become more serious and there is a problem that it is difficult to heat the roller.

In order to make up for the shortcomings of Japanese Patent Laid-Open No. 63-235513, Korean Patent Publication Nos. 10-1999-0074816 and 10-2000-0007231 use a core yarn and an effect yarn having different heat shrinkage rates before or after the third high-developer controller. Revealed how the doctrinal is granted. This solved to some extent the process defect rate and loop occurrence that occurred when the two-shrink blended yarn was separated from the third gode controller set, which is a disadvantage of Japanese Patent Application Laid-Open No. 63-235513. However, in this method, since the core yarn and the effect yarn are driven to the same slope from the second gode controller to the winding, the process defect rate is increased by the heat shrinkage and the elongation difference between the core yarn and the effect yarn. Difficult to create loop at high air pressure. In addition, when the speed of the third roller set is changed to adjust the elongation of the core yarn, the effects yarn is affected as well, and when the third gotten controller is heated, the partially stretched effects yarn receives heat, resulting in noise during driving, which causes the process to be incomplete. And loops occur. For this reason, if the air pressure of the entanglement device is more than 4.0Kgf / cm 2, a loop is generated and the process is unstable, and only the biaxial blended yarn production with a small number of entanglements was possible. As a result, whiteness is generated due to poor entanglement during fabric processing after the twisting process, which makes it difficult to use for dyeing and is used only for printing.

The problem to be solved by the present invention is to provide a method for producing a biaxial horn fiber yarn having a high number of entanglements and uniformity even under high air pressure and no looping and excellent dyeability. In another aspect, the present invention is to provide a method for producing a bi-shrink blended yarn that can produce a product of the same quality while showing two times higher efficiency than producing a bi-shrink blended yarn in two processes.

The present invention is a method for producing a bi-shrink blend fiber by combining two or more kinds of polyester fibers having different thermal shrinkage rate,

Radiating the core yarn and the effect yarn through separate detentions (S1); Stretching and heat treating the core yarn after solidification (S2); Step (S3) of the effect yarn being unstretched with the core yarn having undergone the step (S2); It provides a method for producing a polyester biaxial horn fiber yarn comprising the step of transferring the fused core yarn and the effect yarn to the entanglement imparting device to maintain a constant tension and impart entanglement (S4).

The series of manufacturing methods described above can be accomplished by the core yarn and the effect yarn via several heated and unheated rollers. The core yarns are drawn and then heat treated while passing through several heating rollers. At this time, the draw ratio of the core yarn is 1.5 times to 5.0 times. The effect yarn is spun together with the stretched and heat-treated core yarn in an unstretched state and transferred to an entanglement imparting device. The effect yarn must be kept in an unstretched state without heat treatment in order not to change physical properties. If the effect yarns are transferred to the jointing point immediately after spinning, and the entanglement is given after the weaving with the core yarns, the unevenness (%) increases due to the vibration generated during the cooling after the spinning, and it is difficult to maintain the tension when applying the entanglement. In order to prevent this, the effect yarn is passed through a separate non-heating roller before being transferred to the jointing point, and then weed together with the stretched and heat-treated core yarn. As described above, in order to insulate the stretched and heat-treated core yarns and the effect yarns in the unstretched state, the core yarns are stretched and heat-treated, respectively, via a heating roller, and the effect yarns are unstretched via non-heated rollers. Keep your status. By using this method, the core yarn is stretched and heat treated, but the effect is not heated, so physical properties can be maintained and vibrations can be prevented.

The pulverized core yarn and the effect yarn are entangled with the entanglement imparting device. When the entanglement is given, the number of entanglements is high and the intervals of the entanglements are constant, so that the biaxial intertwined yarn of excellent quality is produced. In order to maintain a constant tension during entanglement, the front and rear rollers are installed at the front and rear ends of the entanglement applying device, respectively, and the speed of each roller is adjusted so that the relaxation ratio (%) is 0.1% to 5.0%. The deceleration rate is defined by the following relational expression 1.

[Relationship 1]

Reduction rate (%) = {(speed difference between front and rear rollers) ÷ (speed of the front rollers)} × 100

The shear roller may function as the shear roller by using a roller installed at the front end of the entanglement applying device among the rollers passed through the core yarn and the effect yarn, rather than separately preparing and installing the tension roller. The rear end roller located at the rear end of the entanglement imparting device is a motor drive type.

The tension (g) at the time of entanglement is within the numerical range determined by the equation defined by the following relational formula (2).

[Relationship 2]

Tension (g) = thickness of the cored yarn and effect yarn (d) × a (g / d)

In the above relation 2, d is denier, g is a unit of tension, a is 0.05 to 0.50.

The number of entanglement provision devices can be one to three depending on the kind of denier, filament and polymer of the effect yarn and the core yarn.

Since the tension can be kept constant by the tension adjusting roller when the entanglement is applied, it is possible to produce a biaxial blended yarn having 50 or more entangles even under an air pressure of 4.0 kgf / cm 2 to 10 kgf / cm 2 or more.

According to the present invention, it is possible to maintain or adjust the tension at the time of applying the entanglement by installing a roller for tension adjustment at the rear end of the entanglement imparting device. Interlock can be given, the number of bridges can be improved and the number of bridges can be adjusted. In particular, it is possible to produce high value-added products with twice the production efficiency and excellent operability since there is no breakage of filament and no loop occurs when producing core yarn of 30 denier or less. In addition, di-shrink horn-seam produced in this way is less susceptible to whiteness, which is a problem during salt processing.

The following is described in detail with reference to one of the preferred embodiments of the method for producing a polyester biaxially blended yarn according to the present invention, the present invention is not limited to the following. Hereinafter, the present invention will be described based on a flowchart of a method for manufacturing hornsome yarn schematically illustrated in FIG. 4.

Polyester isoksook horn blend yarn manufacturing method of the present invention is the step of spinning the core yarn and the effect yarn through a separate detention (S1); Solidifying, stretching and heat-treating the core yarns (S2); Stepping up the effect yarns with the stretched and heat-treated core yarn in an unstretched state (S3); And transferring the pulverized core yarn and the effect yarn to the entanglement imparting device to maintain a constant tension and to impart entanglement to mix the mixed fibers (S4). The series of manufacturing methods described above can be accomplished by the core yarn and the effect yarn via several heated and unheated rollers. The heated and non-heated rollers may be used in the art of the related art in the production of blended yarns, and the core of the Kodette rollers for the purpose of preventing the core yarns from being stretched without the unstretched portion or to prevent entanglement of the yarns. A separate separator roller can be added above or below. 1, 2 and 3, the first separator roller 3b and the third separator respectively above or below the first high controller 3a, the third high controller 5a, and the fourth controller 4a. The method of manufacturing the blend fiber is shown by adding the roller 5a and the fourth separator roller 6b.

Hereinafter, the present invention will be described in detail.

First, the spinneret spins the separate spinnerets 1 and 2 to spin the low shrinkage core yarn and the high shrink yarn effect yarn (S1). The core yarns and the effect yarns may be used in different kinds of polymers according to the characteristics and types of blended yarns to be produced, and the discharge amount, the number of deniers, and the number of filaments may be adjusted differently. In addition, the form of the detention may be appropriately selected according to the blended yarn to be produced, the type of the polymer, and the discharge amount. For example, if you use a composite emitter with two extruders and spin beams, you can select the core yarn as a semi-dull and the effect yarn as a brine. Unlike those shown in FIGS. 1, 2 and 3, the positions of detention of the core yarn and the effect yarn may be interchanged, and if so, the driving direction of the yarn should be changed accordingly.

After cooling, the core thread passes through the first roller set (the first high-detro roller 3a and the first separator roller 3b) and the third roller set (the third high-detro controller 5a and the third separator roller 3b). And to be stretched and heat treated (S2). The core yarn is preferably rotated three to ten times in the first roller set (3a, 3b) and can be selectively controlled, such as the type of polymer, the number of denier, the number of filaments. If the rotation speed is low, the degree of crystallinity is low, and the fabric becomes weak due to the microcrystalline area during dyeing, and the dyeing is also uneven. If the rotation speed is high, the gap between the core yarns is narrowed, so that cutting may occur. The speeds of the first roller sets 3a and 3b are 500 m / m to 4000 m / m, preferably 600 m / m to 2500 m / m. This speed is an element that determines the draw ratio according to the winding speed, and the draw ratio is preferably 1.5 to 5.0 times. The temperature of the first roller sets 3a and 3b is 50 ° C to 130 ° C, preferably 70 ° C to 110 ° C. If the temperature is lower than 50 ° C, the degree of crystallinity of the core yarn is low, so that the dyeability is poor due to the amorphous region. If the temperature is higher than 130 ° C, the running of the yarn in the first roller sets 3a and 3b is unstable and causes cutting. The core yarn via the first roller sets 3a and 3b is caused to rotate three to ten times in the third roller sets 5a and 5b. The rotational speed is determined after checking the shrinkage rate of the core yarns and the spacing between the core yarns. It is preferable to increase the rotational speed in order to decrease the shrinkage rate of the core yarns and to decrease the rotational speed in order to increase the shrinkage ratio. For the heat treatment of the core yarn, the temperature of the third roller sets 5a and 5b is preferably 50 ° C to 200 ° C. However, in order to prevent the physical properties of the effect yarn from being deformed as described below, the third high controller 5a may be heated by separating only the third separator roller 5b without heating. The speed of the third roller set (5a, 5b) is preferably 3000m / m to 6000m / m.

The effect yarn is passed through the second gode controller 4 so that the unstretched state is maintained and then spliced together with the core yarn (S3). When the effect yarn is entangled after weaving with the core yarn without passing through the second gode controller, the noise generated when cooling the radiated effect yarn continues, resulting in unevenness and the quality of the final blended yarn. . In order to prevent this, it is preferable to stabilize the yarns by passing them through the second high-detro controller 4 before incorporating the effect yarns with the core yarns. Since the effect yarn loses its physical properties as a high shrink yarn when heated, the second high controller 4 uses a non-heating roller. At this time, the second Godet roller 4 is effective in preventing tension and maintaining tension by using a motor-driven roller. The speed of the second gode controller 4 is preferably 3000m / m to 6000m / m, it is adjusted based on the winding speed. If the speed is low compared to the winding speed, a loop occurs due to the high tension, and if the speed is higher than the winding speed, the thread is shaken or rolled at the exit part of the second high-detro controller (4) due to the storage force. . The effect yarn via the second gode controller 4 is transferred to the third roller sets 5a and 5b for incorporation with the core yarn. At this time, the effect yarn conveyed in order to prevent the change of the physical properties of the effect yarn is rotated in the third roller set 5a, 5b for 0.5 to 2 times, preferably once. Preferably, as shown in FIGS. 1, 2, and 3, the effect company passes through the second high controller and passes through only the third high controller 5a without passing through the third separator roller 5b. It can be transferred to the devices 7a, 7b, 7c. More preferably, as shown in FIG. 1, when the effect company passes only the third high controller 5a without passing through the third separator roller 5b after passing through the second high controller, the third high controller ( 5a) uses a non-heating roller, and the third separator roller 5b uses a heating roller to allow the core yarn to be stretched and heat treated, and the effect yarn to be maintained in an unstretched state.

The core yarn and the effect yarn pulverized in the third roller set 5a, 5b or the third gode controller 5a are transferred to the entanglement providing apparatuses 7a, 7b, and 7c, and the entanglement is applied to produce a biaxially blended mixed fiber ( S4).

When imparting entanglement to the fused core yarn and the effect yarn, the tension of the yarn must be kept constant so that a high number of entanglements are given uniformly and uniformly, and no sagging or looping occurs. In order to keep the tension constant when applying the entanglement, the front and rear rollers are installed at the front and rear ends of the entanglement applying device, and the speed of the front and rear rollers is adjusted, respectively. To 0.1% to 5.0%.

[Relationship 1]

Reduction rate (%) = {(speed difference between front and rear rollers) ÷ (speed of the front rollers)} × 100

When the deceleration rate exceeds 5.0%, a high tension force is formed between the front roller and the rear roller, so that a part of the biaxially blended yarn is broken and a loop is generated. If the deceleration rate is less than 0.1%, the storage force is formed, so that the vibration phenomenon is poor, which causes cutting, and the intertwined yarns are separated from the entanglement providing apparatuses 7a, 7b, and 7c to prevent entanglement.

The shear roller may function as the shear roller by using a roller installed at the front end of the entanglement applying device among the rollers passed through the core yarn and the effect yarn, rather than separately preparing and installing the tension roller. The rear end roller located at the rear end of the entanglement imparting device is a motor drive type. 1, 2 and 3 in the third roller set (5a, 5b) to play the role of the shear roller, so it is not necessary to install a separate shear roller for maintaining the tension in front of the entanglement applying device It's okay. However, after the entanglement applying device, a separate rear end roller is installed to maintain and adjust the tension when applying the entanglement. 1, 2, and 3, the fourth high controller 6a and the fourth separator roller 6b are installed at the rear end of the entanglement providing device to adjust the tension. The speed of the fourth roller set (the fourth high controller 6a and the fourth separator roller 6b) is adjusted in consideration of the deceleration rate of Equation 1.

The biaxial intertwined yarns passed through the entanglement imparting device are rotated two to five times in the fourth roller sets 6a and 6b. If the rotation speed is less than two times, the tension provision device 7a, 7b, 7c will generate tension unevenness in the biaxial intertwined yarns, and the entanglement will be uneven.If the rotation speed exceeds five times, the collision between the yarns and the yarns during driving will be prevented. Occurs, deterioration of quality and operability decrease.

The temperature of the fourth roller sets 6a and 6b is 20 ° C to 70 ° C, preferably 50 ° C to 70 ° C. Be careful when exceeding 70 ℃ because it may cause a change in the physical properties of the blended yarn.

The entanglement imparting devices 7a, 7b, and 7c can be suitably selected from one to three according to the type of polymer, filament number, denier number, etc. of the core yarn and the effect yarn. When the denier of the bishrink blended yarn is 100 or more, it is preferable to use two to three to increase the number of entanglements. The tension (g) at the time of entanglement is within the numerical range determined by the equation defined by the following relational formula (2).

[Relationship 2]

Tension (g) = thickness of the cored yarn and effect yarn (d) × a (g / d)

In the above relation 2, d is denier, g is a unit of tension, a is 0.05 to 0.50.

The air pressure supplied to the entanglement imparting devices 7a, 7b, and 7c is preferably 4.0 kgf / cm 2 to 10.0 kgf / cm 2. Even if the air pressure is applied more than 4.0kgf / ㎠, the jointed position of the core yarn and the effect is the front part of the entanglement device and the rollers installed at the front and the rear of the entanglement device can maintain and adjust the tension evenly when applying the loop. Very few occurrences. If the air pressure at the time of entanglement is less than 4.0Kgf / cm2, especially 3.5 kgf / cm2 or less, the entanglement is uneven and the number of entanglements is less than 40 / m, so the core and effect yarns are unstable. Since the processed product of the bishrink blended yarn is poor in quality due to the generation of whiteness, the air pressure is preferably 4.0Kgf / cm 2 or more.

Di-shrink mixed fiber manufactured through the above process is wound using a winder (8), wherein the winding speed is preferably 2500m / m to 6500m / m. The winding speed should be determined according to the denier, filament, and polymer type of the core and effect yarns. If the denier is low and the number of filaments is high, the winding speed is lowered. If the winding speed is less than 2500m / m, the unstretched portion of the effect yarn is more than 80%, so the physical property change with time until the use after winding. In addition, when the winding speed exceeds 6500m / m, the effect portion stretched to 20% level, the heat shrinkage rate of the core and effect yarns is low, so the double-shrink blended yarn is not available. The winding tension g of the biaxial horn filament yarn wound by the winding machine 8 is determined by the equation defined by the following relational expression 3 on the basis of the biaxial horn filament yarn denier.

[Relationship 3]

Tension (g) = thickness of biaxial intertwined yarn (d) × a (g / d)

In the above relation 3, d is denier, g is a unit of tension, a is 0.10 to 0.25.

For example, when the denier value of the biaxial blend fiber is 100, the winding tension is adjusted to 10 g to 25 g.

Features and other advantages of the present invention as described above will become more apparent through the following embodiments. The following examples are intended to illustrate the invention and the invention is not so limited.

Example  One

A biaxial hornsum yarn was prepared through the biaxial hornsum yarn manufacturing method shown in FIG. 1. Polymers used semi-dulls and detained circles. The core yarn denier was 60, the number of filaments was 36, the effect yarn denier was 90, and the number of filaments was 72. The speed of the first roller sets 3a and 3b is 1500 m / m, the temperature is 77 ° C., the speed of the second high controller 4 is 3980 m / m, and the speed of the third roller sets 5a and 5b is 4050 m. / m, the temperature of the third separator roller 5b was 135 ° C, the speeds of the fourth roller sets 6a, 6b were 4100 m / m, the temperature was 60 ° C, and the winding speed was 4000 m / m. One entanglement provision apparatus 7a was provided, and air pressure was 6.0 Kgf / cm <2>.

Example  2

A biaxial hornsum yarn was prepared through the biaxial hornsum yarn manufacturing method shown in FIG. 2. Polymers used semi-dulls and detained circles. The core yarn denier was 60, the number of filaments was 36, the effect yarn denier was 90, and the number of filaments was 72. The speed of the first roller set (3a, 3b) is 1500m / m, the temperature is 77 ℃, the speed of the second gode controller 4 is 3980m / m, the speed of the third roller set (5a, 5b) is 4050m / m The temperature of the third separator roller 5b was 135 ° C, the speeds of the fourth roller sets 6a, 6b were 4100 m / m, the temperature was 60 ° C., and the winding speed was 4000 m / m. Two entanglement provision devices 7a and 7b were provided, and the air pressure was 6.0 Kgf / cm 2.

Example  3

A biaxial hornsum yarn was prepared through the biaxial hornsum yarn manufacturing method shown in FIG. 2. The polymer used was a semi-derle, and the core yarn denier was 60, the number of filaments was 36, the effect yarn denier was 90, and the number of filaments was 72. The core of the core yarn was Y-shaped. The speed of the first roller set (3a, 3b) is 1300m / m, 77 ℃, the speed of the second gode controller 4 is 3480m / m, the speed of the third roller set (5a, 5b) is 3540m / m, The temperature of the three-separated roller 5b was 135 degreeC, the speed of the 4th roller sets 6a and 6b was 3590 m / m, the temperature was 60 degreeC, and the winding speed was 3500 m / m. Two interlocking devices 7a and 7b were used, and the air pressure was 6.0 Kgf / cm 2.

Example  4

A biaxial hornsum yarn was prepared through the biaxial hornsum yarn manufacturing method shown in FIG. 2. The polymer was used as a semi-derle, and the core yarn was 60, the number of filaments was 36, the effect yarn denier was 90, and the number of filaments was 72. Detention used a circle. The speed of the first roller sets 3a and 3b is 1800 m / m, the temperature is 80 ° C., the speed of the second goth controller 4490 m / m, and the speed of the third roller sets 5a and 5b is 4570 m / m. The temperature of the third separator roller 5b was 135 ° C, the speeds of the fourth roller sets 6a, 6b were 4610 m / m, the temperature was 60 ° C., and the winding speed was 4500 m / m. Two entanglement provision devices 7a and 7b were used, and the air pressure was 6.0 Kgf / cm 2.

Example  5

A biaxial hornsum yarn was prepared through the biaxial hornsum yarn manufacturing method shown in FIG. 1. Polymers used semi-dulls and detained circles. The core yarn denier was 30, the number of filaments was 24, the effect yarn denier was 40, and the number of filaments was 36. The speed of the first roller set (3a, 3b) is 1500m / m, 75 ℃, the speed of the second gode controller (4) is 3980m / m, the speed of the third roller set (5a, 5b) is 4050m / m, the third The temperature of the separator roller 5b was 130 ° C, the speeds of the fourth roller sets 6a, 6b were 4100 m / m, the temperature was 60 ° C., and the winding speed was 4000 m / m. One entanglement imparting device 7a was used, and the air pressure was 6.0 Kgf / cm 2.

Example  6

A biaxial hornsome yarn was prepared through the biaxial hornsome yarn manufacturing method of FIG. 1. Polymers used semi-dulls and detained circles. The core yarn denier was 30, the number of filaments was 24, the effect yarn denier was 40, and the number of filaments was 36. The speed of the first roller set (3a, 3b) is 1800m / m, the temperature is 77 ℃, the speed of the second high-detro controller 4 is 4480m / m, the speed of the third roller set (5a, 5b) is 4540m / m The temperature of the third separator roller 5b was 130 ° C, the speeds of the fourth roller sets 6a and 6b were 4590 m / m, the temperature was 60 ° C, and the winding speed was 4500 m / m. One entanglement imparting device 7a was used, and the air pressure was 6.0 Kgf / cm 2.

Example  7

A biaxial hornsome yarn was prepared through the biaxial hornsome yarn manufacturing method of FIG. 1. Core's polymer used semi-dull, detention round shape, Effect's polymer bright and detained Y type. The core yarn denier was 30, the number of filaments was 24, the effect yarn denier was 40, and the number of filaments was 36. The speed of the first roller sets 3a and 3b is 1200 m / m, the temperature is 75 deg. C, the speed of the second goth controller 4 is 3490 m / m, and the speed of the third roller sets 5a and 5b is 3540 m / m. The temperature of the third separator roller 5b was 130 ° C, the speeds of the fourth roller sets 6a and 6b were 3590 m / m, the temperature was 60 ° C., and the winding speed was 3500 m / m. One entanglement imparting device 7a was used, and the air pressure was 6.0 Kgf / cm 2.

Comparative example  One

A biaxial horn fiber was prepared with air pressure of 3.5 Kgf / cm 2 at the time of entanglement. Polymers used semi-dulls and detained circles. The core yarn denier was 60, the number of filaments was 36, the effect yarn denier was 90, and the number of filaments was 72. The speed of the first roller set (3a, 3b) is 1500m / m, the temperature is 77 ℃, the speed of the second gode controller 4 is 3980m / m, the speed of the third roller set (5a, 5b) is 4050m / m The temperature of the third separator roller 5b was 135 ° C, the speeds of the fourth roller sets 6a, 6b were 4100 m / m, the temperature was 60 ° C., and the winding speed was 4000 m / m. Two entanglement provision apparatuses 7a and 7b were provided.

Comparative example  2

A biaxial horn fiber was prepared with air pressure of 3.5 Kgf / cm 2 at the time of entanglement. Polymers used semi-dulls and detained circles. The core yarn denier was 30, the number of filaments was 24, the effect yarn denier was 40, and the number of filaments was 36. The speed of the first roller sets 3a and 3b is 1500 m / m, the temperature is 75 ° C., the speed of the second goth controller 4 is 3980 m / m, and the speed of the third roller sets 5a and 5b is 4050 m / m. The temperature of the third separator roller 5b was 130 ° C, the speeds of the fourth roller sets 6a, 6b were 4100 m / m, the temperature was 60 ° C., and the winding speed was 4000 m / m. One entanglement imparting device 7a was used.

As a result of looking at the biaxial shrink fiber blended through the method of Examples 1 to 7 and Comparative Examples 1 to 2 in terms of the number of loops, loop occurrence, spinning processability, dyeing, etc., as shown in Table 1 below. .

In Examples 1 to 7, even when the air pressure was 6.0Kgf / cm2 when the entanglement was applied, the number of entanglements could be given more than 50ea / m without the occurrence of loops or breakage, and the dyeing property and the spinning processability were very excellent. It was confirmed that it was shown. However, in the case of the air pressure of 3.5Kgf / ㎠ in Comparative Examples 1 and 2 it was difficult to give more than 50ea / m of entanglement, the rate of firing is faster than the air pressure administered when the entanglement is applied, especially the loop processability It was confirmed that the di-shrink blended yarn with poor dyeing properties was produced.

Table 1 Property evaluation results of Examples and Comparative Examples

division Number of intersections (pcs / m) Loop Radiation fairness Dyeing test Entanglement tension (g) Heat Shrinkage Difference (%) Shinto car (%) Example 1 53 ◎ ◎ ◎ 20 22 62 Example 2 60 ◎ ◎ ◎ 22 23 64 Example 3 65 ◎ ◎ ◎ 25 28 86 Example 4 57 ◎ ◎ ○ 25 15 58 Example 5 63 ◎ ◎ ◎ 10 18 62 Example 6 58 ◎ ◎ ○ 12 12 51 Example 7 67 ◎ ◎ ◎ 11 26 78 Comparative Example 1 37 ◎ ◎ × 22 29 63 Comparative Example 2 45 ◎ ◎ × 11 19 57

* Heat shrinkage rate measurement: Shrinkage difference is measured after standing in water at 100 ℃ for 30 minutes. Effect yarn-core yarn = thermal shrinkage difference

* ◎: Very good, ○: Good, △: Normal, ×: Poor

Figure 1 schematically shows a method for producing a horn fiber yarn in which one entanglement device is installed.

Figure 2 schematically shows a method for producing a horn fiber yarn in which two entanglement devices are installed.

Figure 3 schematically shows a method for producing horn fiber yarn three entanglement device is installed.

Figure 4 is a flow chart schematically showing a method for producing a biaxial horn sum yarn of the present invention.

[Explanation of symbols for the main parts of the drawings]

1. Effect yarn spinneret

2. Core yarn spinneret

3a. First Goth Controller

3b. 1st Separator Roller

4. Second Goddetrol

5a. Third God Controller

5b. 3rd Separator Roller

6a. 4th high controller

6b. 4th Separator Roller

7a. 1st entanglement device

7b. Second entanglement device

7c 3rd entanglement device

8. Winding machine

Claims (6)

delete Claims [1] A method for producing a bi-shrink blended yarn by combining two or more polyester fibers having different thermal shrinkage rates, the method comprising the steps of: (S1) spinning a core yarn and an effect yarn; (S2) solidifying, stretching and heat treating the core yarn; (S3) step of fusing the effect yarn with the core yarn having undergone the step (S2) in an unstretched state; (S4) comprising the step of transferring the core yarn and the effect yarn pulverized in the step (S3) to the entanglement imparting device to maintain a constant tension and impart entanglement, The step (S2) is made by passing the core yarns through a heating roller, and the step (S3) is made by sintering the effect yarns via the non-heating rollers and then weaving with the core yarns subjected to the step (S2). Preparation method of blended yarn. Claims [1] A method for producing a bi-shrink blended yarn by combining two or more polyester fibers having different thermal shrinkage rates, the method comprising the steps of: (S1) spinning a core yarn and an effect yarn; (S2) solidifying, stretching and heat treating the core yarn; (S3) step of fusing the effect yarn with the core yarn having undergone the step (S2) in an unstretched state; (S4) comprising the step of transferring the core yarn and the effect yarn pulverized in the step (S3) to the entanglement imparting device to maintain a constant tension and impart entanglement, In the step (S4), the front and rear rollers are installed at the front and rear ends of the entanglement imparting device, and the reduction ratio (%) defined by the following relation 1 becomes 0.1% to 5.0% of each roller. A method of producing a polyester-based biaxially blended blend yarn, in which tension of the effect yarn, effect yarn and core yarn is kept constant by adjusting the speed. [Relationship 1] Reduction rate (%) = {(speed difference between front and rear rollers) ÷ (speed of the front rollers)} × 100 Claims [1] A method for producing a bi-shrink blended yarn by combining two or more polyester fibers having different thermal shrinkage rates, the method comprising the steps of: (S1) spinning a core yarn and an effect yarn; (S2) solidifying, stretching and heat treating the core yarn; (S3) step of fusing the effect yarn with the core yarn having undergone the step (S2) in an unstretched state; (S4) comprising the step of transferring the core yarn and the effect yarn pulverized in the step (S3) to the entanglement imparting device to maintain a constant tension and impart entanglement, In the step (S4), the tension (g) at the time of imparting entanglement is to be within the numerical range determined by the formula defined by the following equation (2). [Relationship 2] Tension (g) = thickness of the cored yarn and effect yarn (d) × a (g / d) In the above relation 2, d is denier, g is a unit of tension, a is 0.05 to 0.50. The method of claim 2, The manufacturing method of the polyester type bi-shrink blended yarn which makes the heating temperature of the rear end roller provided in the back end of the said entanglement provision apparatus be 20 degreeC-70 degreeC. Claims [1] A method for producing a bi-shrink blended yarn by combining two or more polyester fibers having different thermal shrinkage rates, the method comprising the steps of: (S1) spinning a core yarn and an effect yarn; (S2) solidifying, stretching and heat treating the core yarn; (S3) step of fusing the effect yarn with the core yarn having undergone the step (S2) in an unstretched state; (S4) comprising the step of transferring the core yarn and the effect yarn pulverized in the step (S3) to the entanglement imparting device to maintain a constant tension and impart entanglement, In the step (S4), the air pressure at the time of applying the entanglement is to be made from 4.0kgf / cm 2 to 10.0kgf / cm 3f.

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