KR101558058B1 - Spinneret for polyester complex-fiber with highly elasticity and method for manufacturing highly elastic polyester complex-fiber using thereof - Google Patents

Abstract

The present invention relates to a spinneret for polyester composite fibers having excellent stretchability and a polyester composite fiber using the spinneret. More particularly, the present invention relates to a spinneret for polyester composite fibers having excellent stretchability, And to a method for producing a polyester conjugate fiber using the spinneret for polyester conjugate fiber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a spinneret for polyester composite fibers having excellent elasticity and a method for manufacturing polyester composite fibers using the same,

The present invention relates to a spinneret for polyester composite fibers having excellent stretchability and a polyester composite fiber using the spinneret. More particularly, the present invention relates to a spinneret for polyester composite fibers having excellent stretchability, And to a method for producing a polyester conjugate fiber using the spinneret for polyester conjugate fiber.

In recent years, as demand for fabrics that require high elasticity has increased, market demand for spandex has been increasing. Spandex is a kind of polyurethane-based fibers obtained by polymerizing and melt-spinning polyether and methylene diphenyl isocyanate. The spandex has a quality higher than that of a conventional rubber thread, such as being lighter than a rubber band and having a strong anti-aging property. Also, it is a unique fiber with elasticity similar to rubber. It has very high tensile strength (ultimate strength), so it can not be broken well and it is elastic enough to increase 5 ~ 8 times of the original length. It does not become dirty with sweat, oil, and cosmetics, and it can withstand washing well. Also, it can be pulled out thinly as much as rubber and it is good in dyeability. The spandex has been produced since 1959 under the trade name of Lycra in the name of spandex, an elastic urethane fiber made by DuPont of USA, and now Lycra is widely used as a generalized material name.

The spandex is excellent in stretchability, is easy to be active, and is excellent in durability, perspiration, and dryness, and is used in various applications such as underwear, lining, and outerwear. Spandex has an advantage of providing a feeling of comfort with high perspiration and drying ability to discharge sweat quickly. Korean Patent Application No. 2007-0046520 and Korean Patent Application No. 2000-7004226 disclose spandex fibers having the same effect have. However, spandex is costly, weak in heat, has static electricity, has a problem with alkali resistance, can not be used with spandex yarn alone, and requires a separate covering process. Therefore, there is a limit to the demand of the market in which a thinner fabric is desired because a relatively thick fabric can not be obtained.

In order to overcome the disadvantages of such spandex, a stretch potential housing was proposed. The latent crimp fiber is produced by composite spinning two kinds of polymers having different heat shrinking characteristics in a side-by-side manner or a sheath-core type, and then heat is applied in a spinning process or a stretching process, It is a fiber that gives a high degree of elasticity by the principle similar to a spring by making a coil shape physically by a difference. The stretchability of the spandex fiber is less than that of the conventional spandex fiber. However, since the spandex has the disadvantage of the above-mentioned spandex, it has excellent alkali resistance and shape stability, and uses a large number of potentially crimped fibers which are easy to dye and post-process.

As the above-mentioned latent crimp fiber, a fiber in which a heterogeneous polyester resin having a viscosity difference is conventionally spin-spun has been proposed.

However, when the resin having different shrinking characteristics is compounded by 8-shaped or side-by-side type, there is a difference in viscosity of the heterogeneous polyester resin discharged from the discharge port, resulting in a difference in flow velocity, There is a problem that the productivity of the spinning process is significantly lowered or the quality of the composite fiber produced is deteriorated. More specifically, FIG. 1 is a photograph of a composite fiber including a polyester resin different from that of a conventional spinneret spinneret having different viscosity and different shrinkage characteristics. The spinneret (FIG. 1) 95).

Accordingly, it is urgently required to study spinning detachment which can minimize the incidence of artifacts in composite spinning of different types of polyester resins having different viscosity differences.

SUMMARY OF THE INVENTION The present invention has been accomplished in order to solve the above-mentioned problems, and it is an object of the present invention to provide a spinning apparatus for spinning spinning, which satisfies a specific condition according to the present invention, .

A second problem to be solved by the present invention is to provide a method for manufacturing a polyester composite fiber having excellent stretchability by using a spinneret satisfying a specific condition according to the present invention, and to provide a horn construction using the same.

In order to solve the first problem described above, the present invention provides a spinneret for a composite fiber including a first spinneret for ejecting a first component and a second spinneret for ejecting a second component, (?) Between the center axis of the longitudinal section of the first spinneret and the longitudinal axis of the second spinneret which is coplanar with the vertical line is an angle of? There is provided a spinneret for polyester composite fibers excellent in stretchability satisfying the following relational expression (1).

[Relation 1]

30 ° ≤ α + β ≤ 70 °

According to a preferred embodiment of the present invention, the first angle? May be 10 to 30 degrees.

According to another preferred embodiment of the present invention, the second angle? May be 20 to 40 °

According to another preferred embodiment of the present invention, the first angle? And the second angle? Can satisfy the following relational expression (2).

[Relation 2]

According to another preferred embodiment of the present invention, the composite fiber including the first component and the second component emitted through the nozzle may have a curvature angle of less than 35 °.

According to another preferred embodiment of the present invention, the intrinsic viscosity of any one of the first component and the second component is from 0.4 to 0.6 dl / g, the intrinsic viscosity of the other component is from 0.6 to 0.8 dl / g, The intrinsic viscosity difference of the component may be at least 0.1 dl / g.

In order to solve the above second problem, the present invention provides a method for producing a conjugated fiber using a spinneret for conjugated fiber according to the present invention, comprising the steps of (1) mixing a first component comprising polyethylene terephthalate (PET) Wherein the monomer represented by the general formula (2) is present in a molar ratio of 1: 0.8 to 0.95 with respect to the monomer represented by the general formula (1), the monomer represented by the general formula (3) is added to the monomer represented by the general formula Melting a second component comprising the copolymerized component in a molar ratio of 0.5 to 0.2; And (2) spinning the first component to the first spinning nozzle of the spinneret and spinning the second component in combination with the second spinning nozzle. The present invention also provides a method of producing a polyester composite fiber having excellent stretchability.

[Chemical Formula 1]

(2)

(3)

According to a preferred embodiment of the present invention, the second component may further comprise a monomer having a molecular weight of 440 to 4400 and represented by the following general formula (4).

[Chemical Formula 4]

Wherein n is an integer of 10 to 100.

According to another embodiment of the present invention, the monomer represented by the formula (4) may be contained in a molar ratio of 1: 0.0005 to 0.003 relative to the monomer represented by the formula (1) in the second component.

According to another preferred embodiment of the present invention, in the step (1), the intrinsic viscosity of the first component is 0.4 to 0.6 dl / g, the intrinsic viscosity of the second component is 0.6 to 0.8 dl / g, And the difference in intrinsic viscosity of the first component may be 0.1 dl / g or more.

According to another preferred embodiment of the present invention, the weight ratio of the first component and the second component which are combined in the step (2) may be 30:70 to 70:30.

According to another preferred embodiment of the present invention, the fibers radially blended after step (2) may satisfy the following conditions (a) and (b).

(a) Resonator shrinkage (%) 7% or more

(b) Residual shrinkage (%) 35% or more

Resonator shrinkage ratio: 20.5 g of load was applied to the drawn yarn in the twist state in which the composite fiber was drawn (first godet roller speed / temperature: 1500mpm / 90 ° C, second godet roller speed / temperature: 4000mpm / The percentage of the original length of the shrinked length after heat treatment for 10 minutes at 82 ± 3 ° C.

* Residual shrinkage ratio: 1.5 g of the load was applied to the drawn yarn in the twist state in which the composite fibers were subjected to a stretching treatment (primary godet roller speed / temperature: 1500mpm / 90 ° C, secondary godet roller speed / temperature: 4000mpm / Percentage of the length of the original state of shrinked length after heat treatment at 82 ± 3 ° C for 10 minutes.

According to another preferred embodiment of the present invention, the combined radiated fibers after the step (2) may have a fullness ratio of 85% or more according to the following relationship (3).

[Relation 3]

According to another preferred embodiment of the present invention, the cross-sectional shape of the composite radiated fiber after step (2) may be an octahedral shape or a side-by-side shape.

According to another preferred embodiment of the present invention, the yarn angle (°) of the composite yarn after step (2) may be 35 ° or less.

In order to solve the second problem described above, the present invention provides a horn construction comprising the polyester composite fiber excellent in stretchability manufactured according to the present invention.

In addition, the present invention provides a fabric comprising polyester composite fibers excellent in stretchability produced according to the present invention.

Hereinafter, terms used in the present invention will be defined.

In the present invention, the term " fiber " as used herein means " yarn " or " yarn "

As used herein, the term 'composite fiber' is used to mean a yarn itself produced by composite spinning or a fiber including stretched and / or partially stretched roughened fibers.

The " heat fixing temperature " used in the present invention means the surface temperature of the second godet roller of the godet roller commonly used in the drawing process.

The spinning andocking machine for polyester conjugate fibers having excellent stretchability of the present invention minimizes troubles such as pulling and cutting, which are frequently occurred in producing highly stretchable polyester fibers, and can improve spinnability, And the yarn radiated through detention according to the present invention is very excellent in stretchability and can be used for various kinds of clothes requiring elasticity

1 is a photograph of a stretchable conjugate fiber comprising a heterogeneous polyester-based resin having different shrinkage properties radiated through a conventional composite fiber spinneret .
2 is a schematic diagram of a set of spinning nozzles included in a spinneret according to a preferred embodiment of the present invention.
Fig. 3 is a schematic diagram of the angle of incidence of the triplet hybrid fiber.
FIG. 4 is a photograph of a stretchable composite fiber including components having different shrinkage characteristics with minimized protrusion by spinneret according to a preferred embodiment of the present invention.
5 is a flowchart of a manufacturing process according to a preferred embodiment of the present invention.
6 is a schematic diagram of a manufacturing process according to a preferred embodiment of the present invention.
7 is a schematic view of a composite fiber having an 8-shaped cross section according to a preferred embodiment of the present invention.
8 is a composite fiber photograph of an 8-shaped cross section according to a preferred embodiment of the present invention.
9 is a SEM photograph of a composite fiber according to a preferred embodiment of the present invention.
10 is a schematic view of a composite fiber of a side-by-side cross section according to a preferred embodiment of the present invention.
11 is a SEM photograph of a composite fiber according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

As described above, there is a difference in flow velocity between the homogeneous or heterogeneous resin discharged from the discharge port when the heterogeneous or homogeneous resin having different shrinking characteristics is conventionally compounded by 8-shaped or side-by-side type, The difference in the flow velocity causes a drawback and / or a cut-off of the spinning composite fiber, and thus the spinning workability is significantly lowered or the quality of the composite fiber produced is deteriorated.

Therefore, in the present invention, a spinneret for a composite fiber including a first spinneret for spinning a first component and a second spinneret for spinning a second component, (?) Between the longitudinal center axes of the first spinning nozzles and the longitudinal center axis of the second spinning nozzle coplanar with the vertical line satisfies the following relational expression (1) The present inventors sought to solve the above-mentioned problems by providing a spinneret for an excellent polyester conjugate fiber.

[Relation 1]

30 ° ≤ α + β ≤ 70 °

As a result, it is possible to provide a polyester composite fiber having excellent stretchability with remarkably improved spinnability such as truncation phenomenon and truncation occurring when a homogeneous or heterogeneous polymer having different intrinsic viscosities and / Lt; RTI ID = 0.0 > spinning < / RTI >

First, the spinneret according to the present invention may include at least one conventional spinneret distribution plate for forming a spinneret flow path for melted homogeneous or heterogeneous polymer, An inlet of the molten polymer used for the nip for the conjugated fiber, or a molten portion for melting the different polymer. The first spinning nozzle and the second spinning nozzle for discharging the different kinds of molten polymer may be formed in the lower part of the detaching distribution plate, and a plurality of the first spinning nozzle and the second spinning nozzle may be included. The first spinning nozzle 91 and the second spinning nozzle 92 may have a shape, an inner diameter, an outer diameter, and a material of a nozzle included in a conventional spinneret. In the present invention, the specific shape, Outer diameter, material, and the like.

2 is a schematic view of a group of spinning nozzles included in the spinneret according to a preferred embodiment of the present invention, in which a first spinneret 91 and a second spinneret 92 forming a group are disposed on the surface 93 Respectively. That is, the vertical axis a of the longitudinal axis of the first spinning nozzle 91 is inclined at a predetermined angle (first angle?) Toward the paper surface 93 with reference to a virtual vertical line b perpendicular to the paper surface 93, ). The center axis c of the vertical plane of the second spinning nozzle 92 is inclined at a predetermined angle (second angle?) Toward the paper surface 93 with reference to a virtual vertical line b perpendicular to the paper surface 93, ), And the vertical line (b) and the central axes (a, c) are all located on the same plane.

First, a first angle of incidence?, Which is an angle between a virtual vertical line perpendicular to the paper plane and a longitudinal axis center axis of the first spinning nozzle on the same plane will be described.

The first spinning nozzle 91 is a nozzle for discharging the first component, and may be included in a plurality of the spinning nozzles by forming a group of spinning nozzles 92 to be described later.

The longitudinal axis center axis a of the first spinning nozzle 91 is directed toward the ground surface 93 on the basis of a virtual vertical line b perpendicular to the ground surface 93 on which the first component is discharged on the same plane And the first angle? Between the axis a and the perpendicular line b may be preferably 10 to 30 °. If the angle is less than 10 °, it may be difficult to manufacture the nozzle because the first component nozzle and the nozzle of the second component are close to each other in manufacturing the nozzle. If the angle is larger than 30 °, There is a problem that the spinning performance is remarkably deteriorated.

The first component that can be discharged through the first spinning nozzle 91 has a difference in intrinsic viscosity from the second component that can be discharged through the second spinning nozzle 92 and is made of a polyester composite fiber Can be used without limitation. As a non-limiting example, polyethylene terephthalate (PET), polyethylene terephthalate (PET), polytetramethylene terephthalate (PTT), or polybutylene terephthalate (PET) further modified by addition of certain monomers among polyethylene terephthalate PBT), or a mixture of two or more of them.

The copolymerization ratio of each monomer as a specific monomer is added to the modified PET is not particularly limited to the present invention. The specific monomers may include an aromatic polycarboxylic acid, an aliphatic polycarboxylic acid, and a polycarboxylic acid including a heterocycle, and may further include other sulfonic acid metal salts.

 More specifically, as a non-limiting example of the aromatic polycarboxylic acid, dimethyl terephthalate, isophthalic acid, and dimethyl isophthalate other than terephthalic acid may be used.

Examples of the aliphatic polyvalent carboxylic acid include but are not limited to oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, citric acid, pimelic acid, azelaic acid, sebacic acid, Agaric acid, dodecanoic acid, and hexanodecanoic acid.

Further, as the non-limiting examples of the polycarboxylic acid including the above-mentioned heterocyclic ring, 2,5-furandicarboxylic acid, 2,5-ciphopendicarboxylic acid, 2,5-pyrrole dicarboxylic acid and the like can be used have.

Non-limiting examples of the sulfonic acid metal salt include sodium 3,5-dicarbomethoxybenzenesulfonate, lithium 3,5-dicarbomethoxybenzenesulfonate, 5-sulfoisophthalic acid monosodium salt, and the like. Can be used.

The diol component may include an aliphatic diol having 2 to 14 carbon atoms. Examples of the aliphatic diol include, but are not limited to, diethylene glycol, neopentyl glycol, 1,3-propanediol, Butanediol and 1,6-hexanediol, propylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, decamethylene glycol, undecamethylene Glycol, dodecamethylene glycol, tridecamethylene glycol, and the like.

In addition to the aliphatic diol, the polyalkylene glycol may further include a polyalkylene glycol, and the molecular weight of the polyalkylene glycol may be 1,000 to 10,000.

Next, an imaginary vertical line perpendicular to the paper and an angle? Between the longitudinal center axes of the second spinning nozzle on the same plane will be described.

The second spinning nozzle 92 is a nozzle for discharging the second component, and may be included in a plurality of the spinning nozzles forming a group with the first spinning nozzle 91.

The longitudinal axis center axis c of the second spinning nozzle 92 is directed toward the paper surface 93 on the basis of a virtual vertical line b perpendicular to the paper surface 93 on which the second component is ejected, And the second angle of incidence β, which is an angle between the vertical line b and the axis c, is preferably 20 to 40 °. If the angle is less than 20 °, there may be a problem that the yarn production from the first component direction to the second component direction becomes large, and yarn production by the yarn during the yarn is remarkably deteriorated. When the angle exceeds 40 °, There may be a problem that the radiating performance is significantly lowered due to the occurrence of yarn splicing due to the spinning of the yarn when the yarn from the two component direction to the first component increases.

The second component that can be discharged through the second spinning nozzle 92 has a difference in intrinsic viscosity from the first component that can be discharged through the first spinning nozzle 91, Can be used without limitation. As a non-limiting example, polyethylene terephthalate (PET), polyethylene terephthalate (PET), polytetramethylene terephthalate (PTT), or polybutylene terephthalate (PET) further modified by addition of certain monomers among polyethylene terephthalate PBT), or a mixture of two or more of them.

The copolymerization ratio of each monomer as a specific monomer is added to the modified PET is not particularly limited to the present invention. The specific monomers may include an aromatic polycarboxylic acid, an aliphatic polycarboxylic acid, and a polycarboxylic acid including a heterocycle, and may further include other sulfonic acid metal salts.

 More specifically, as a non-limiting example of the aromatic polycarboxylic acid, dimethyl terephthalate, isophthalic acid, and dimethyl isophthalate other than terephthalic acid may be used.

Examples of the aliphatic polyvalent carboxylic acid include but are not limited to oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, citric acid, pimelic acid, azelaic acid, sebacic acid, Agaric acid, dodecanoic acid, and hexanodecanoic acid.

Further, as the non-limiting examples of the polycarboxylic acid including the above-mentioned heterocyclic ring, 2,5-furandicarboxylic acid, 2,5-ciphopendicarboxylic acid, 2,5-pyrrole dicarboxylic acid and the like can be used have.

Non-limiting examples of the sulfonic acid metal salt include sodium 3,5-dicarbomethoxybenzenesulfonate, lithium 3,5-dicarbomethoxybenzenesulfonate, 5-sulfoisophthalic acid monosodium salt, and the like. Can be used.

The diol component may include an aliphatic diol having 2 to 14 carbon atoms. Examples of the aliphatic diol include, but are not limited to, diethylene glycol, neopentyl glycol, 1,3-propanediol, Butanediol and 1,6-hexanediol, propylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, decamethylene glycol, undecamethylene Glycol, dodecamethylene glycol, tridecamethylene glycol, and the like.

In addition to the aliphatic diol, the polyalkylene glycol may further include a polyalkylene glycol, and the molecular weight of the polyalkylene glycol may be 1,000 to 10,000.

Further, the second component may be a modified polyester copolymer included in the process for producing a polyester conjugate fiber having excellent elongation and contraction characteristics using the spinneret according to the present invention described below.

According to a preferred embodiment of the present invention, the intrinsic viscosity of any one of the first component and the second component is 0.4 to 0.6 dl / g, the intrinsic viscosity of the other component is 0.6 to 0.8 dl / g, The intrinsic viscosity difference of each component may be 0.1 dl / g or more. In addition, any one of the first component and the second component may be a modified polyester component used in producing a stretchable polyester conjugate fiber using the nipping according to the present invention. When the first component and the second component differ in their intrinsic viscosity and intrinsic viscosity as described above and in particular their shrinkage properties, when using the detergent according to the present invention, pruning under the detention is prevented as much as possible, The property can be remarkably improved.

The first angle? And the second angle? As described above must satisfy the following relational expression 1 in order to solve the problem of the present invention.

[Relation 1]

30 ° ≤ α + β ≤ 70 °

This is because when two kinds of polymers having different intrinsic viscosity are radiated, the two kinds of polymers having different intrinsic viscosity and different shrinking properties are diffused, The inventors of the present invention have found that when the two kinds of polymers having intrinsic viscosity differences are compounded and radiated, the first spinning nozzle 91 for discharging the first component and the second component, respectively, And the second spinning nozzle 92 are tilted with respect to the paper surface 93, the present invention has been accomplished.

If the sum of the angles is smaller than 30 degrees, there is a problem that the drawability generated in the first component direction to the second component direction increases, There may be a problem that the drawability generated in the direction of the second component from the direction of the second component becomes large and the workability is remarkably deteriorated due to the occurrence of yarn breakage by the yarn during the spinning.

The sum of the angles may be more preferably 40 to 60 [deg.] To further minimize the projecting phenomenon.

The composite fiber comprising two kinds of polymers having different intrinsic viscosities and / or different shrinkage properties radiated by the claws satisfying the relational expression 1 may have a triangular occurrence angle of preferably 35 ° or less as the pruning phenomenon is minimized, Lt; RTI ID = 0.0 > 20, < / RTI > 3 is a schematic view of the incidence angle of the triangulated composite fibers. In FIG. 3, the triangles angle refers to an angle (?) Between imaginary lines perpendicular to the composite fiber 95 and the bottom end surface 96 do. FIG. 4 is a photograph of a composite fiber obtained by spinning of the present invention.

Meanwhile, according to a preferred embodiment of the present invention, the first angle? And the second angle? May further satisfy the following relational expression 2 in order to prevent the articulation phenomenon.

[Relation 2]

By satisfying the above relational expression, it is possible to remarkably prevent the development and trimming of the yarn, thereby improving the productivity in producing the composite fiber. If the difference between the two angles is greater than 25 degrees, the triangle generated from the second component direction to the first component direction may increase, There is a problem that the workability is significantly reduced due to the generation of yarn by the yarn drawing while the yarn is generated from the direction of the first component to the direction of the second component. In particular, when the angles of the two yarns are the same, It can not be a great contribution to improvement of operability.

On the other hand, by using the spinneret according to the present invention described above, it is possible to provide a spinneret comprising (1) a first component comprising polyethylene terephthalate (PET) and a monomer represented by the following general formulas Melting a second component comprising a component represented by the general formula (2) in a molar ratio of 1: 0.8 to 0.95, wherein the monomer represented by the general formula (1) is copolymerized with the monomer represented by the general formula (3) in a molar ratio of 0.5 to 0.2; And (2) spinning the first component onto the first spinning nozzle of the spinneret, and spinning the second component on the second spinning nozzle with the second spinning nozzle. An excellent polyester conjugate fiber can be produced.

[Chemical Formula 1]

(2)

(3)

Specifically, FIG. 5 is a flow chart of a manufacturing process according to a preferred embodiment of the present invention. Referring to FIG. 5, a step S11 of melting a first component and a second component through a step S10, The composite fiber may be produced and may additionally be subjected to a post-spin-cooling solidification step (S12), an emulsion feed step (S13), a stretching step (S14), and a partial stretching may be further performed before the stretching step.

First, in step (1), (1) comprises a first component comprising polyethylene terephthalate (PET) and a monomer represented by the following general formulas (1) to (3) And a second component comprising a component copolymerized at a molar ratio of 1: 0.8 to 0.95 with respect to the monomer represented by the general formula (1) in an amount of 0.05 to 0.2 mole of the monomer represented by the general formula (3).

Specifically, FIG. 6 is a schematic view of a manufacturing process according to a preferred embodiment of the present invention, in which the first component 10 and the second component 20 can be melted in a molten portion.

More specifically, the poly (ethylene terephthalate) contained in the first component is terephthalic acid and ethylene glycol as monomers, and may be a conventional polyethylene terephthalate fiber used for latent crimped fibers. According to a preferred embodiment of the present invention, the intrinsic viscosity of the first component may be 0.4 to 0.6 dl / g. If the intrinsic viscosity is less than 0.4 dl / g, the complex phenomenon of the composite fibers produced during spinning is markedly increased, resulting in poor spinning workability. In addition, When the intrinsic viscosity exceeds 0.6 dl / g, there is a problem that the viscosity difference with the second component to be described below is small and the desired stretchability can not be obtained, and the stretching property of the yarn is deteriorated have. The melting point of the first component may be 230 to 270 캜.

Next, the first component and the second component compounded in the following step (2) include all the monomers represented by the following formulas (1) to (3), wherein the monomer represented by formula (2) 0.8 to 0.95 molar ratio, and the monomer represented by the general formula (3) is copolymerized at a molar ratio of 0.05 to 0.20 with respect to the monomer represented by the general formula (1).

[Chemical Formula 1]

(2)

(3)

Conventionally, latent wind turbines using the above-mentioned first component and fibers containing polytetrafluoromethyl terephthalate (PTT) as composite fibers have been disclosed. However, since the cost of the monomers contained in the polytetrafluoromethyl terephthalate is high, There is a problem that the manufacturing unit cost rises.

Accordingly, the inventors of the present invention have been able to produce conjugated fibers having improved stretchability while lowering the manufacturing cost by modifying polyethylene terephthalate.

If the amount of the monomer represented by the general formula (2) is less than 0.8 molar ratio relative to the monomer of the general formula (1), the polymerization degree may be lowered or the polymerization degree may be lowered. There may be a problem that a large amount of diethyl glycol as a reactant may be generated. If the monomer of formula (2) exceeds 0.95 molar ratio, there is a problem that the polymerization degree is lowered or the stretchability of the conjugate fiber is lowered.

Next, the monomer represented by the general formula (3) is contained at a molar ratio of 1: 0.05 to 0.20 relative to the monomer of the general formula (1). If the monomer of the general formula (3) is less than 0.05 mole ratio, the stretchability of the conjugated fiber is markedly decreased, There is a problem that the productivity of spinning is remarkably lowered.

According to a preferred embodiment of the present invention, the second component may be a copolymerized component further comprising a monomer represented by the following general formula (4) for further improving elasticity.

[Chemical Formula 4]

And n is an integer of 10 to 100. If n is less than 10 or less than 440, the polymerization reaction rate may be lowered during the polymerization process. If n exceeds 100 or the molecular weight exceeds 4400, the viscosity during the second component polymerization process is high, A problem that the reactor is subjected to a heavy load may occur.

The monomer represented by Formula 4 is preferably contained in a molar ratio of 1: 0.0005 to 0.003 relative to the monomer represented by Formula 1 in the second component. If the molar ratio is less than 0.0005, the improvement of the stretchability of the conjugate fiber may be insignificant. If the molar ratio exceeds 0.003, the polymerization degree may be lowered and the glass transition temperature and melting point may be lowered. The melting point of the second component may be 210 to 250 ° C.

According to a preferred embodiment of the present invention, the intrinsic viscosity of the second component is 0.6 to 0.8 dl / g, and the intrinsic viscosity difference of the second component and the first component may be 0.1 dl / g or more.

If the intrinsic viscosity of the second component is less than 0.6, the desired stretchability can not be attained, and due to the low viscosity, the yarn breakage may occur when the polymer is discharged immediately under spinning at spinning. If the intrinsic viscosity exceeds 0.8 dl / g , The viscosity difference with the first component is significantly increased, and thus the pruning phenomenon in spinning remarkably increases, resulting in poor spinning operability.

The difference in intrinsic viscosity between the second component and the first component may be 0.1 dl / g or more. If the intrinsic viscosity difference as described above does not occur, stretchability may be weak and weak.

Next, in step (2), composite radiating the molten first component and the second component.

In the composite spinning, the first component and the second component may be combined in a weight ratio of 30:70 to 70:30, and the spinning temperature is preferably 240 to 300 ° C, more preferably 260 to 280 ° C And the spinning speed can be 2900 to 5100 mpm.

The above-described spinneret according to the present invention is used for the composite spinning. Since the first and second components have different intrinsic viscosities, and furthermore, their shrinkage characteristics are remarkably different, the second component is a component having excellent stretch properties (P in FIG. 1) is generated under the confinement as shown in FIG. 1 through the conventional spinning spinning detachment method, and the spinning workability is remarkably poor. However, in the spinning spinning method according to the present invention, So that the radiating performance can be remarkably improved. Specifically, it can be seen from FIG. 4 that the curvature under the spinneret is prevented.

According to a preferred embodiment of the present invention, the cross-sectional shape of the conjugated fiber radiated through the step (2) may be an octahedral shape or a side-by-side shape, The production of fibers may be advantageous in terms of physical properties such as stretchability.

7 and 8 are schematic cross-sectional views and photographs of a composite fiber according to a preferred embodiment of the present invention, in which first and second components (101, 103) and second components (102, 104) . 10 is a cross-sectional view of a composite fiber according to a preferred embodiment of the present invention, in which the first component 112 and the second component 113 form a side-by-side cross-sectional shape.

The composite fiber emitted through the step (2) may pass through the cooling and solidifying step (40 in FIG. 6). At this time, it is preferable to advance the cooling wind at a speed of 15 to 40 mpm, and if it is out of the above range, it is difficult to control the cross-sectional shape of the fiber and the uniformity can not be improved.

Next, emulsions can be supplied for smooth spinning and winding. The emulsion spraying method or the oil roller method may be used in the guide (50 in FIG. 6) provided with the guide in the solidification area, and either method may be used.

According to a preferred embodiment of the present invention, after the emulsion supply, a partial stretching process or a stretching process may be further included. The fiber orientation can be improved by a partial stretching or stretching process to obtain fibers having higher strength. Specifically, the two rollers (the primary godet roller 60 and the secondary godet roller 70) shown in Fig. 6 will be described in detail below.

The partial stretching may be performed under the conditions of a first godet roller speed of 2000 to 3500 mpm and a second godet roller speed of 2000 to 3500 mpm.

In the drawing step, the first godet roller speed may be 1,000 to 2,000 mpm, and preferably 1,400 to 1,600 mpm. If the elongation speed of the first godet roller is less than 1,000 mPm, there is a problem that the physical properties are lowered with the change of the yarn over time, and the yarn tension is low due to the low first godet roller speed. If the stretching speed exceeds 2,000 mPm, uneven stretching may occur and dyeing defects may occur. The temperature of the primary godet roller may be 60 to 120 캜, preferably 80 to 100 캜.

Next, the second godet roller speed may be 3,000 to 5,000 mpm, and the stretching speed may preferably be 3500 to 4,500 mpm in consideration of spinnability. If the second godet roller speed is less than 3,000 mpm, the physical properties of the spun yarn, in particular, the strength and the productivity are lowered. If the second godet roller speed is more than 5,000 mpm, yarn shaking may occur in the second godet roller, have. The temperature of the second godet roller may be 110 to 170 캜, and preferably 130 to 150 캜. If the heat setting temperature of the secondary godet roller is less than 110 ° C, there is a possibility that the physical properties such as the elongation and the like may change with the elapse of time, and the yarn having a high shrinkage ratio may cause shrinkage during the subsequent dyeing process If the temperature is higher than 160 DEG C, tremors in the second godet roller become large, which may result in difficulty in stable operation.

The composite fibers produced through the above steps may have a full tube ratio (%) of 85% or more.

The full pipe ratio (%) is calculated by the following relational expression 3, and the higher the full pipe ratio, the better the spinning productivity.

[Relation 3]

The composite fiber manufacturing method according to the present invention has a full tube ratio of 85% or more, indicating that spinnability is excellent even though two kinds of polymers having different intrinsic viscosities are co-spun.

According to a preferred embodiment of the present invention, the fibers co-spun after the step (2) may satisfy the following conditions (a) and (b).

First, as the condition (a), the leesona shrinkage (%) may be 7% or more. The shrinkage ratio of the recycled fiber was 20.5 g for a drawn fiber obtained by drawing the composite fiber at a first godet roller speed of 1500 mPm, a temperature of 90 캜 and a second godet roller speed of 4000 mpm at a temperature of 140 캜, The percentage of the original length of the shrunk length after heat treatment for 10 minutes in water. The present invention has a risona shrinkage ratio of 7% or more so that when woven into a fabric, it can have more stretchability than conventional stretchable yarns.

Next, as the condition (b), the residual shrinkage (%) may be 35% or more. The residual shrinkage ratio was obtained by applying 1.5 g of the conjugated fiber to the drawn filament yarn obtained by drawing the filament fiber at a first godet roller speed of 1500 mPm, a temperature of 90 캜 and a second godet roller speed of 4000 mpm at a temperature of 140 캜, Lt; / RTI > is the percentage of the length of the original state of the retracted length after 10 minutes heat treatment. The present invention has a residual shrinkage ratio of not less than 35%, and when the knitted fabric is knitted, it can have greater stretchability than conventional stretchable fibers.

Meanwhile, the present invention includes the construction of a horn island including the polyester composite fiber having excellent stretchability produced by the manufacturing method according to the present invention.

The fiber-mixed yarn may include heterogeneous fibers other than the composite fibers produced according to the present invention. Specific examples of the fiber include at least one selected from the group consisting of nylon 6, nylon 66, nylon 6.10, and aramid (PET), modified polyethylene terephthalate (PET), polytetramethylene terephthalate (PTT), and polybutylene terephthalate (PBT). And the like. The modified polyethylene terephthalate (PET) may be specifically modified by adding a specific monomer to PET, and the copolymerization ratio of the respective monomers at this time is not particularly limited to the present invention. The specific monomers may include an aromatic polycarboxylic acid, an aliphatic polycarboxylic acid, and a polycarboxylic acid including a heterocycle, and may further include other sulfonic acid metal salts.

 More specifically, as a non-limiting example of the aromatic polycarboxylic acid, dimethyl terephthalate, isophthalic acid, and dimethyl isophthalate other than terephthalic acid may be used.

Examples of the aliphatic polyvalent carboxylic acid include but are not limited to oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, citric acid, pimelic acid, azelaic acid, sebacic acid, Agaric acid, dodecanoic acid, and hexanodecanoic acid.

Further, as the non-limiting examples of the polycarboxylic acid including the above-mentioned heterocyclic ring, 2,5-furandicarboxylic acid, 2,5-ciphopendicarboxylic acid, 2,5-pyrrole dicarboxylic acid and the like can be used have.

Non-limiting examples of the sulfonic acid metal salt include sodium 3,5-dicarbomethoxybenzenesulfonate, lithium 3,5-dicarbomethoxybenzenesulfonate, 5-sulfoisophthalic acid monosodium salt, and the like. Can be used.

The diol component may include an aliphatic diol having 2 to 14 carbon atoms. Examples of the aliphatic diol include, but are not limited to, diethylene glycol, neopentyl glycol, 1,3-propanediol, Butanediol and 1,6-hexanediol, propylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, decamethylene glycol, undecamethylene Glycol, dodecamethylene glycol, tridecamethylene glycol, and the like.

In addition to the aliphatic diol, the polyalkylene glycol may further include a polyalkylene glycol, and the molecular weight of the polyalkylene glycol may be 1,000 to 10,000.

When the different types of yarns are polyester fibers, the woven fabric may include titanium dioxide in the polyester fiber in order to have improved gloss and powder touch. Preferably, titanium dioxide may comprise from 1.0 to 2.5% by weight in the fiber. If titanium dioxide is contained in an amount of less than 1.0% by weight, there may be a problem that the feel is significantly lowered. If the titanium dioxide is included in an amount exceeding 2.5% by weight, there may be a problem in that the web is streaked.

In addition, the polyester fiber may further include a material capable of imparting functionalities such as flame retardancy and antibacterial property. Preferably, the polyester fiber may contain 0.4 to 10% by weight of phosphorus flame retardant, inorganic antibacterial agent alone or in combination . If it is contained in an amount less than 0.4% by weight, there is a problem that the flame retardancy or antimicrobial function is insufficient. If it is contained in an amount exceeding 10% by weight, the cost may increase and the competitiveness may be lost.

The fiber-mixed yarn may be mixed with other kinds of fibers without judging whether one of the different kinds of fibers is judged and the other yarn is judged to be a superfine yarn or a judged yarn or a superficial yarn.

In addition, the present invention provides a fabric comprising polyester composite fibers excellent in stretchability produced according to the present invention.

The polyester composite fiber excellent in stretchability produced according to the present invention can exhibit excellent stretchability when contained in a woven or knitted fabric since the polyester conjugated fiber has a lysine shrinkage percentage (%) of 7% or more and a residual shrinkage percentage (% have.

The term fabric used in the present invention includes both fabric and knitted fabric.

First, the fabric may be a fabric that is weaved by using the polyester composite fiber having excellent stretchability according to the present invention, at least one of warp and weft.

The weaving may be performed by any one method selected from the group consisting of plain weave, twill weave, water weave, and double weave.

If the plain weave, twill weave, and water weave are three-dimensional tissue, the specific weaving method of each of the three-dimensional tissue is determined by a conventional weaving method, and it is possible to modify the tissue based on the three- There are, for example, changing jobs, changing jobs, changing jobs, changing jobs, changing jobs, non-working jobs, and twisting jobs. .

The double yarn is a method of weaving a fabric in which either one of warp yarns or weft yarns is doubled or both yarns are doubled. The specific method may be a conventional double yarn weaving method.

However, the present invention is not limited to the base fabric of the above-mentioned fabric, and is not particularly limited in the case of the warp yarn density in weaving.

In addition, the fabric may be a knitted fabric including a polyester composite fiber having excellent stretchability as a yarn. The knitting can be performed by a method of stitch knitting or knitting, and a specific method of stitch knitting and knitting can be performed by a conventional method of stitch knitting or knitting.

The present invention will now be described more specifically with reference to the following examples. However, the following examples should not be construed as limiting the scope of the present invention, and should be construed to facilitate understanding of the present invention.

≪ Example 1 >

As the first component, terephthalic acid and ethylene glycol were used as monomers, and the polymerization molar ratio of the respective monomers was 1: 1.12, and the intrinsic viscosity was 0.50 dl / g to prepare polyethylene terephthalate.

The second component is prepared by reacting the compound represented by the formula (5) with the compound represented by the formula (5) in a molar ratio of 1: 1.007, 1: 0.112, 1: 0.001 , And a high shrinkage polyester polymer having a molecular weight of 1000 and an intrinsic viscosity (IV) of the copolymerized component of 0.70 dl / g was prepared.

2, having a first angle of incidence of 15 °, a second angle of incidence of 30 °, and a first and a second angle of incidence of 45 ° as shown in Table 1 below, The first component having an intrinsic viscosity of 0.5 dl / g was discharged from the nozzle, and the second component having an intrinsic viscosity of 0.7 dl / g was discharged from the second spinning nozzle. The spinning temperature was set to 270 ° C, and the spinning speed was 3940 mpm to spin up composite fibers to produce composite fibers as shown in Table 1 below. At this time, the ejection weight ratio of the component ejected from the first spinning nozzle and the ejected component from the second spinning nozzle was 50:50. The speed of the first godet roller for stretching was 1,500mpm, the temperature was 92 ° C, the speed of the second godet roller was 4,000mpm, the temperature was 135 ° C, the winding speed was 3,940mpm and 60 denier and 48 filaments A polyester conjugate fiber as shown in Table 2 below having an 8-shaped cross-sectional shape was produced.

[Chemical Formula 5]

[Chemical Formula 6]

(7)

 [Chemical Formula 8]

≪ Examples 2 to 3 >

The composite filament as shown in Table 1 below was prepared by changing the first angle of incidence and the second angle as shown in Table 1 below.

≪ Examples 4 to 14 >

The molar ratio of the monomers contained in the second component and the discharge weight ratio of the first component and the second component were changed as shown in Tables 2 and 3 below to prepare poly To prepare an ester conjugate fiber.

≪ Comparative Examples 1 to 3 >

The composite filaments were prepared in the same manner as in Example 1 except that the first angle of incidence and the second angle of incidence were changed as shown in Table 1 below.

≪ Comparative Examples 4 to 8 >

Except that the molar ratio of the monomers contained in the second component and the discharge weight ratio of the first component and the second component were changed as shown in Table 4 below to prepare a polyester conjugate fiber as shown in Table 4 below .

<Experimental Example 1>

The following properties of the polyester conjugate fibers prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were measured and are shown in Table 1 below.

1. Occurrence angle (°)

In order to measure the degree of occurrence of the projections, photographs of the polymer discharge state at the time of irradiation were measured to determine the angle of incidence (the imaginary line perpendicular to the surface of the cage and the angle formed by the irradiated fibers under the cage).

2. Spinning performance (%)

(Full%) to evaluate spinnability, and the full tube ratio was measured by using a polyester-free fiber (spinning or partially spinning) yarn according to the present invention, As the yield of the composite fiber,

으로 계산하였다.

Respectively.

<Experimental Example 2>

The following properties of polyester conjugate fibers prepared through Examples 4 to 14 and Comparative Examples 4 to 8 were measured and shown in Tables 2 to 4 below.

1. Strength and elongation

The strength and elongation were measured using an automatic tensile tester (Textechno) at a speed of 200 cm / min and a grip distance of 50 cm. Strength and elongation are the strength (g / de) divided by the denier (de) when the fiber is stretched until it is cut with a constant force, the strength, the percentage of the initial length as a percentage of the elongation, ) Were defined as extension.

2. Spinning performance (%)

(Full%) to evaluate spinnability, and the full tube ratio was measured by using a polyester-free composite fiber (drawn or partially drawn) according to the present invention, As the yield of composite fibers

으로 계산하였다.

Respectively.

3. Leasona shrinkage (%) and residual shrinkage (%)

In order to evaluate the stretchability of the composite fibers, the ratio of shrinkage and residual shrinkage was evaluated. The shrinkage ratio was determined by drawing the composite fiber at a first godet roller speed of 1500 mPm, a temperature of 90 캜, a second godet roller speed of 4000 mpm, The tensile strength of the drawn yarn was calculated as a percentage of the original length of the shrunk length after heat treatment at 82 ± 3 ° C for 10 minutes with a load of 20.5g.

The residual shrinkage ratio was obtained by applying 1.5 g of the composite fiber to the drawn filament yarn obtained by drawing the filaments at a first godet roller speed of 1500 mPm, a temperature of 90 캜 and a second godet roller speed of 4000 mpm at a temperature of 140 캜, As a percentage of the length of the original state of the shrunk length after heat treatment for 10 minutes in water.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 The first spinning nozzle The first component intrinsic viscosity (dl / g) 0.50 0.50 0.50 0.50 0.50 0.50 The first angle?,? 15 20 25 5 30 12 The second spinning nozzle The second component intrinsic viscosity (dl / g) 0.70 0.70 0.70 0.70 0.70 0.70 The second angle?,? 30 50 30 20 50 12 α (°) + β (°) 45 70 55 25 80 24 β (°) - α (°) 15 30 5 15 20 0 Spinning nozzle discharge weight ratio 50:50 50:50 50:50 50:50 50:50 50:50 De ' 60 60 60 60 60 60 Occurrence angle (°) 5 36 28 40 45 43 Accumulation rate (%) 95 80 88 74 65 70

Specifically, in Table 1, the comparative example in which the sum of the first angle and the second angle do not satisfy the relational expression 1 according to the present invention, shows that the angle of incidence is remarkable and the fullness ratio is also poor compared with the embodiment.

In addition, even if the sum of the first angle and the second angle satisfies the relational expression 1 according to the present invention, the second embodiment in which the second angle is more than 40 degrees causes the artifact more seriously than the first embodiment, Can be confirmed.

In addition, Example 1 in which the sum of the first angle of incidence and the second angle satisfies Relation 1 of the present invention and Relation 2 of the present invention is significantly smaller than that of Examples 2 and 3, , Respectively.

Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 The first component TPA: EG mole ratio One :
1.12 1: 1.12 1: 1.12 1: 1.12 1: 1.12 1: 1.12 Intrinsic viscosity (dl / g) 0.50 0.45 0.55 0.50 0.50 0.50 The second component Formula 1
Monomer
Per 1 mole Formula 2 (molar ratio) 1.007 0.950 1.042 1.008 0.991 1.007 Formula 3 (molar ratio) 0.112 0.168 0.078 0.112 0.112 0.112 Formula 4
(Molar ratio / molecular weight) 0.001 /
1000 0.002 /
1000 0 0 0.017 /
1000 0.001 /
400 Intrinsic viscosity (dl / g) 0.70 0.75 0.70 0.70 0.70 0.70 Conjugated fiber Intrinsic viscosity difference (dl / g) 0.2 0.3 0.15 0.2 0.2 0.2 First component: second component weight ratio 50:50 40:60 60:40 50:50 50; 50 50:50 Fineness (denier / number of filaments) 60/48 60/48 60/48 60/48 60/48 60/48 Sectional shape 8-shape 8-shape 8-shape 8-shape 8-shape 8-shape Strength (g / de ') 2.80 2.68 2.60 2.55 2.60 2.70 Shinto (%) 22.0 23.0 23.5 25.0 23.7 24.0 Accumulation rate (%) 95 90 95 88 86 87 Resona shrinkage (%) 10 9 8 8 7 8 Remaining shrinkage (%) 45 42 40 38 37 36

* SBS: side by side type Example 10 Example 11 Example 12 Example 13 Example 14 The first component TPA: EG mole ratio One :
1.12 One :
1.12 One :
1.12 1: 1.12 1: 1.12 Intrinsic viscosity (dl / g) 0.50 0.50 0.55 0.50 0.50 The second component
Formula 1
Monomer
Per 1 mole Formula 2 (molar ratio) 1.007 1.007 1.007 1.007 1.007 Formula 3 (molar ratio) 0.112 0.112 0.112 0.112 0.112 Formula 4
(Molar ratio / molecular weight) 0.001 /
12,000 0.001 /
1000 0.001 /
1000 0.001 /
1000 0.001 /
1000 Intrinsic viscosity (dl / g) 0.7 0.70 0.60 0.70 0.70 Conjugated fiber Intrinsic viscosity difference (dl / g) 0.2 0.2 0.05 0.2 0.2 First component: second component weight ratio 50:50 50:50 50:50 20:80 80:20 Fineness (denier / number of filaments) 60/48 60/48 60/48 60/48 60/48 Sectional shape 8-shape SBS 8-shape 8-shape 8-shape Strength (g / de ') 2.4 2.6 2.7 2.4 2.4 Shinto (%) 26 25.5 27 27 25 Accumulation rate (%) 74 88 82 75 72 Resona shrinkage (%) 6 8 5 5.5 5 Remaining shrinkage (%) 30 40 27 28 25

Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 The first component TPA: EG mole ratio One :
1.12 One :
1.12 One :
1.12 1: 1.12 1: 1.12 Intrinsic viscosity (dl / g) 0.50 0.50 0.50 0.45 0.45 The second component Formula 1
Monomer
Per 1 mole Formula 2 (molar ratio) 1.119 1.074 1.074 1.12 0.829 Formula 3 (molar ratio) 0 0.045 0.045 0 0.28 Formula 4
(Molar ratio / molecular weight) 0.001 /
1,000 0.001 /
1000 0.001 /
1000 0 0.011 /
1000 Intrinsic viscosity (dl / g) 0.7 0.70 0.70 0.75 0.75 Conjugated fiber Intrinsic viscosity difference (dl / g) 0.2 0.2 0.2 0.3 0.3 First component: second component weight ratio 50:50 50:50 25:70 50:50 60:40 Fineness (denier / number of filaments) 60/48 60/48 60/48 60/48 60/48 Sectional shape 8-shape 8-shape 8-shape 8-shape 8-shape Strength (g / de ') 2.6 2.5 2.7 2.5 2.6 Shinto (%) 23 22 25 26 25 Accumulation rate (%) 90 82 70 82 65 Resona shrinkage (%) 2 4 4 5 10 Remaining shrinkage (%) 15 20 20 23 55

Specifically, in Comparative Example 4, which does not include the monomer of Formula 3 in the Tables 2 to 4, the rheosin shrinkage ratio and the residual shrinkage ratio are remarkably decreased and the stretchability is greatly reduced compared to Examples 4 to 14, It can be confirmed that the improvement in elasticity is insignificant in the case of Comparative Example 5 which contains a small amount of monomer.

Also, in Example 7, which does not contain the formula 4 as a monomer, the stretchability is remarkably reduced as compared with the case of the example 4, and the tightness ratio is lowered, so that the spinning workability is poor.

In addition, even when the monomer (4) was included as a monomer, it was confirmed that Example 8 containing a large amount of mol% in the second component was inferior in stretchability and spinning workability. In Example 9 It can be confirmed that the elasticity and radiation workability are also deteriorated. In the case of Example 10 in which the molecular weight of the monomer of Chemical Formula 4 is too large, the stretchability and radiation workability are remarkably lowered.

In addition, it can be confirmed that Example 11, which is the side-by-side type, has poor spinning workability in terms of stretchability as compared with Example 4 in which the cross-sectional shape of the conjugate fiber is octahedral.

Further, it can be confirmed that in Example 12 in which the intrinsic viscosity difference is only 0.05 compared to Example 4 in which the intrinsic viscosity difference between the first component and the second component is 0.2, the extensibility and radiation workability are remarkably decreased.

In addition, in Examples 13 and 14 in which the weight ratio of the first component to the second component in the conjugate fiber is out of the range of 70:30 to 30:70, the spinning workability and the stretchability are lowered than in Example 4. [

Claims (17)

And a second spinneret for discharging a first spinneret for ejecting the first component and a second component having a higher intrinsic viscosity than the first component,
(A) between an imaginary vertical line perpendicular to the ground and an intersection between the central axis of the longitudinal section of the first spinning nozzle on the same plane and a vertical angle between a longitudinal center axis of the second spinning nozzle on the same plane as the vertical line A spinneret for polyester composite fibers excellent in stretchability wherein an angle (?) Satisfies the following relational expression (1) and (2).
[Relation 1]
30 ° ≤ α + β ≤ 70 °
[Relation 2]
10 ° ≤ β - α ≤ 25 ° The method according to claim 1,
Wherein the first angle? Is in the range of 10 to 30 °. The method according to claim 1,
Wherein the second angle? Is in the range of 20 to 40 占 The spinneret for polyester composite fibers having excellent stretchability. delete The method according to claim 1,
Wherein the composite yarn having the first component and the second component radiated through the nozzle has a curvature angle of 35 DEG or less. The method according to claim 1,
Wherein the intrinsic viscosity of any one of the first component and the second component is 0.4 to 0.6 dl / g, the intrinsic viscosity of the other component is 0.6 to 0.8 dl / g, and the intrinsic viscosity difference of each component is 0.1 dl / g or more It is characterized by excellent spinnability for polyester composite fibers. A composite fiber is produced using the spinneret for a composite fiber according to any one of claims 1 to 3, 5, and 6,
(1) a first component comprising polyethylene terephthalate (PET) and monomers represented by the following general formulas (1) to (3), wherein the monomer represented by general formula (2) is used in an amount of from 1: 0.8 to 0.95 Melting a second component comprising a component copolymerized with a monomer represented by the general formula (3) in a molar ratio of 0.5 to 0.2 with respect to the monomer represented by the general formula (1); And
(2) spinning the first component onto the first spinning nozzle of the spinneret, and spinning the second component on the second spinning nozzle.

[Chemical Formula 1]

(2)

(3)

The method according to claim 7, wherein in the step (1)
Wherein the second component is further copolymerized with a monomer having a molecular weight of 440 to 4400 and represented by the following general formula (4).
[Chemical Formula 4]

Wherein n is an integer of 10 to 100. 9. The method of claim 8,
Wherein the monomer represented by the formula (4) is contained in a ratio of 1: 0.0005 to 0.003 molar ratio relative to the monomer represented by the formula (1) in the second component. The method according to claim 7, wherein in the step (1)
Wherein an intrinsic viscosity of the first component is 0.4 to 0.6 dl / g, an intrinsic viscosity of the second component is 0.6 to 0.8 dl / g, and a difference of intrinsic viscosity of the second component and the first component is 0.1 dl / g or more A method for producing a polyester composite fiber excellent in stretchability. 8. The method of claim 7, wherein in step (2)
Wherein the weight ratio of the first component to the second component is from 30:70 to 70:30. 8. The method of claim 7,
The method of producing a polyester conjugate fiber excellent in stretchability characterized by satisfying the following conditions (a) and (b) after the step (2).
(a) Resonator shrinkage (%) 7% or more
(b) Residual shrinkage (%) 35% or more
Resonator shrinkage ratio: 20.5 g of load was applied to the drawn yarn in the twist state in which the composite fiber was drawn (first godet roller speed / temperature: 1500mpm / 90 ° C, second godet roller speed / temperature: 4000mpm / The percentage of the original length of the shrinked length after heat treatment for 10 minutes at 82 ± 3 ° C.
* Residual shrinkage ratio: 1.5 g of the load was applied to the drawn yarn in the twist state in which the composite fibers were subjected to a stretching treatment (primary godet roller speed / temperature: 1500mpm / 90 ° C, secondary godet roller speed / temperature: 4000mpm / Percentage of the length of the original state of shrinked length after heat treatment at 82 ± 3 ° C for 10 minutes. 8. The method of claim 7,
Wherein the composite yarn after the step (2) has a full-length ratio of at least 85% according to the following relationship (3).
[Relation 3]

8. The method of claim 7,
Characterized in that the cross-sectional shape of the composite yarn radiated after step (2) is an 8-shaped or side-by-side type. 8. The method of claim 7,
Wherein the composite yarn after step (2) has a curvature angle (deg.) Of 35 DEG or less. A horn-island construction comprising polyester composite fiber excellent in stretchability manufactured according to claim 7. A fabric comprising a polyester composite fiber excellent in stretchability produced according to claim 7.

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