KR102276223B1 - Polyester twisted composite yarn having excellent color development property and shrinkage, fabric comprising thereof, and manufacturing method thereof - Google Patents

Abstract

The present invention provides a polyester composite false twist yarn having excellent elasticity and excellent color development and elasticity that satisfies excellent color development and dyeability due to remarkably improved elasticity and excellent color fastness, and at the same time satisfies drape property, rebound elasticity, softness, and excellent touch, and a method for manufacturing the same do.

Description

Polyester composite false-twisted yarn with excellent color development and elasticity, fabric including same, and manufacturing method thereof

The present invention relates to a polyester composite false-twisted yarn having excellent color development and elasticity, and a method for manufacturing the same, and more particularly, to have optimal elasticity and color development during dyeing, while simultaneously providing drape, rebound elasticity, softness, and excellent tactile properties. It relates to a polyester-based composite false twist yarn having satisfactory color development and excellent elasticity, and a method for manufacturing the same.

Existing polyester composite false twisted yarns use the difference in elongation of the two types of yarns to induce a difference in the degree of false twist in the same false twisting area, so yarns with low elongation (low shrinkage yarn) go into the examination of composite false twist yarns, and yarns with high elongation (high shrinkage yarns) is composed of the first yarn of the composite yarn so that the first yarn has a structure surrounding the examination. In this case, when heat-treated in the post-processing process, the high shrinkage yarn shrinks a lot, and the low shrinkage yarn forms crimps so that irregular crimps appear in the longitudinal direction of the yarn. Since the composite false-twist yarn exhibits bulkiness and soft touch, woven/knitted fabrics using it are widely used as materials for women's suits, trousers, jackets, and the like.

On the other hand, Korea Patent Application No. 1996-0027854 discloses a polyester composite false twisted yarn, but such a composite false twisted yarn 1) was satisfactory to a certain extent in terms of soft touch and bulkiness by the core yarn, but in recent suits and casual wear fields It was not satisfactory in terms of the natural elasticity and dyeability normally required in the market, and 2) it was difficult to have excellent tactile, soft, body and drape properties as well as a lot of loops.

The present invention has been devised to solve the above-mentioned problems, and the problem to be solved by the present invention is that elasticity is remarkably improved and excellent color development and dyeing properties are satisfied due to excellent fastness, and at the same time, drape property, rebound elasticity, soft property, and excellent touch are provided. To provide a polyester-based composite false twist yarn having satisfactory color development and excellent elasticity, and a method for manufacturing the same.

In the present invention, the core yarn is a polyester-based latent crimp type drawn yarn, the effect yarn is a polyester-based low-oriented yarn (LOY) or a partially-oriented yarn (POY), and the core yarn and the core yarn are heat-shrinkable. A composite fiber comprising different first and second components, wherein the first component includes polyethylene terephthalate (PET), and the second component includes an acid component; A diol component comprising a diol having 2 to 8 carbon atoms and 2-methyl-1,3-propanediol; and a sulfonic acid metal salt; a polyester copolymer copolymerized by including a monomer Provided is a polyester-based composite false twist yarn having excellent color development and elasticity, characterized in that the content of 2-methyl-1,3-propanediol is different.

According to a preferred embodiment of the present invention, the core yarn may include a polyester copolymer copolymerized with 1 to 9 mol% of 2-methyl-1,3-propanediol among the diol components. have.

According to another preferred embodiment of the present invention, the effect yarn may include a polyester copolymer copolymerized with 4- to 14 mol% of 2-methyl-1,3-propanediol among the diol components. can

According to another preferred embodiment of the present invention, the first and second yarns may be of a sheath-core type, a side-by-side type or a sea-island type.

According to another preferred embodiment of the present invention, in the polyester copolymer included in the second component, the acid component and the diol component are copolymerized in a molar ratio of 1: 0.8 to 2.0, and the sulfonic acid metal salt is the polyester copolymer. It may be included in an amount of 0.5 to 5 mol% compared to the coal.

According to another preferred embodiment of the present invention, the acid component may include any one or more selected from the group consisting of aromatic polyhydric carboxylic acids having 6 to 14 carbon atoms and aliphatic polyhydric carboxylic acids having 2 to 16 carbon atoms. have.

According to another preferred embodiment of the present invention, the aromatic polyvalent carboxylic acid having 6 to 14 carbon atoms may be at least one selected from the group consisting of terephthalic acid, dimethylisophthalic acid, isophthalic acid and dimethylterephthalic acid.

According to another preferred embodiment of the present invention, the diol having 2 to 8 carbon atoms is selected from the group consisting of ethylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol and 1,6-hexanediol. It may be any one or more selected.

According to another preferred embodiment of the present invention, the total fineness of the composite false twisted yarn is 20 to 120 denier, the single yarn fineness of the core is 2 to 4 denier, and the single yarn fineness of the first yarn is 1 to 3 denier, The degree of orientation of the first yarn may be 30×10 ⁻³ to 70×10 ⁻³ .

According to another preferred embodiment of the present invention, the composite false twisted yarn may have a crimp elongation ratio of 30% or more according to the following Relational Equation 1.

[Relational Expression 1]

Crimp elongation (%) = [(L2-L1)/L2] x 100

(The skein is immersed in non-water under no load for 30 minutes, dried in room temperature air, and after applying a load of 0.1 g/d for 2 minutes, remove the load and leave it for 10 minutes. The sample is placed under a load of 0.002 g/d for 2 minutes. After placing, measure the length (L1), add 0.1 g/d load to it, measure the length (L2) after 2 minutes, remove the 0.1 g/d load, and measure the length (L3) after 2 minutes. )

According to another preferred embodiment of the present invention, the composite false-twisted yarn may have a washing fastness value of grade 4 or higher according to any one of the following cited standards.

*Citation standard

KS K 0903 General rule of test method for color fastness

KS K 0905 Attached white cloth for color fastness test

KS K 0910 Gray color table for contamination

K KS 0911 Standard gray color table for discoloration

K KS K ISO 105-F10 Textile-Dyeing Fastness-Multi-Fiber Textile Standard Attachment Table

In addition, the present invention is (1) melting a first component comprising polyethylene terephthalate (PET), and an acid component as a second component; Melting a component comprising a polyester copolymer copolymerized by including a diol component comprising a diol having 1 to 8 carbon atoms and 2-methyl-1,3-propanediol; and a sulfonic acid metal salt as a monomer; (2) composite spinning the molten first component and the second component to obtain a core yarn and a core yarn; and (3) manufacturing a composite false twist yarn through a false twisting process of the core yarn and the sheath yarn; The core yarn is a polyester-based latent crimp type drawn yarn, the first yarn is a polyester low-oriented yarn (LOY) or a partially-oriented yarn (POY), and the Provided is a method for producing a polyester-based composite false twist yarn having excellent color development and elasticity, characterized in that the content is different.

According to a preferred embodiment of the present invention, the diol component of the core yarn comprises 1 to 9 mol% of 2-methyl-1,3-propanediol, and the diol component of the super yarn is 2-methyl-1,3-propane It may contain 4 to 14 mol% of diol.

According to another preferred embodiment of the present invention, in step (2), the first component and the second component may be composite spun in a weight ratio of 1:1.2 to 2.

Furthermore, the present invention provides a fabric comprising any one of the polyester-based composite false twisted yarns above.

The present invention provides a polyester composite false twist yarn having excellent elasticity and excellent color development and elasticity that satisfies excellent color development and dyeability due to remarkably improved elasticity and excellent color fastness, and at the same time satisfies drape property, rebound elasticity, softness, and excellent touch, and a method for manufacturing the same do.

1 is a cross-sectional schematic view of a polyester-based composite false twisted yarn according to a preferred embodiment of the present invention.
2 is an image of observing the dyeability of a fabric according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them.

As described above, the conventional polyester composite false twist yarn was satisfactory to a certain extent in terms of soft touch or bulkiness by the core yarn, but it was not satisfactory in terms of natural elasticity and dyeability normally required in the recent formal and casual wear fields. Not only did a lot of loops occur, but it was also difficult to have excellent tactile, soft, body and drape properties at the same time.

Accordingly, in the present invention, the core yarn is a polyester-based latent crimp type drawn yarn (SDY), and the effect yarn is a polyester-based low-oriented yarn (LOY) or partially-oriented yarn (POY), and the core yarn and the The sheath yarn is a composite fiber comprising a first component and a second component having different heat shrinkage properties, the first component includes polyethylene terephthalate (PET), and the second component is an acid component; A diol component comprising a diol having 2 to 8 carbon atoms and 2-methyl-1,3-propanediol; and a sulfonic acid metal salt; a polyester copolymer copolymerized by including a monomer Provided is a polyester-based composite false twist yarn having excellent color development and elasticity, characterized in that the content of 2-methyl-1,3-propanediol is different.

Through this, the polyester composite false twisted yarn with excellent color development and elasticity of the present invention is expected to have significantly improved elasticity and satisfactory color development and dyeability due to excellent fastness, while satisfying drape properties, resilience, softness, and excellent tactile properties. can

Specifically, FIG. 1 is a schematic cross-sectional view of a polyester-based composite false twisted yarn according to a preferred embodiment of the present invention. As can be seen from the drawings, the composite false twist yarn of the present invention includes a core yarn 110 and a sheath yarn 120 .

The core yarn 110 of the present invention is a polyester-based latent crimp type drawn yarn, and the first yarn 120 is a polyester-based low-oriented yarn (LOY) or a partially-oriented yarn (POY).

Examination and initial yarn of the polyester-based composite false twisted yarn of the present invention includes a polyester copolymer copolymerized with the first component and acid component containing polyethylene terephthalate (PET), the diol component and the sulfonic acid metal salt as monomers It is a polyester-based composite fiber comprising a second component.

First, the first component including the polyethylene terephthalate (PET) will be described. The polyethylene terephthalate (PET) has terephthalic acid and ethylene glycol as monomers, and may be a typical 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 0.7 dl/g. If the intrinsic viscosity is less than 0.4 dl/g, the weft phenomenon of the composite fiber produced during spinning increases significantly, resulting in poor spinning operability. There are also disadvantages in that it is difficult to develop strength, the heat resistance is lowered, and when the intrinsic viscosity exceeds 0.7 dl/g, the spinning tension increases in the spinning process, making it difficult to control orientation and crystallization. The melting point of the first component may be 230 ~ 270 ℃.

In addition, according to a preferred embodiment of the present invention, the weight ratio of the first component and the second component in the examination and chosa may be 1: 1.2 to 2. If the weight ratio is less than 1: 1.2 or exceeds 1: 2, there is a problem in that the polymer balance of the two components is not met, so that the twisting occurs, the spinning operability is poor, and the stretching properties are also reduced.

Next, the second component will be described.

The second component is an acid component as a component; A polyester copolymer copolymerized by including a diol having 2 to 8 carbon atoms and a diol component including 2-methyl-1,3-propanediol; and a sulfonic acid metal salt as a monomer.

Conventionally, latent crimped yarns having a fiber containing the above-described first component and polytepramethylterephthalate (PTT) as a composite fiber have been disclosed, but the cost of the monomer included in the polytepramethylterephthalate is high, so the latent crimped yarn is There was a problem in that the manufacturing cost increased.

Accordingly, the inventors of the present invention were able to manufacture a composite false-twisted yarn having improved elasticity while lowering the manufacturing cost by modifying polyethylene terephthalate.

First, the acid component includes at least one selected from the group consisting of aromatic polyhydric carboxylic acids having 6 to 14 carbon atoms and aliphatic polyhydric carboxylic acids having 2 to 16 carbon atoms.

The aromatic polyhydric carboxylic acid having 6 to 14 carbon atoms may be at least one selected from the group consisting of terephthalic acid, dimethyl terephthalate, isophthalic acid, and dimethyl isophthalate, and preferably terephthalic acid in terms of manufacturing cost and excellent heat resistance.

In addition, an aliphatic polyhydric carboxylic acid having 2 to 14 carbon atoms may be further included as an acid component to improve dyeability for basic dyes and to enable dyeing at atmospheric pressure. Non-limiting examples of the aliphatic polyhydric carboxylic acid having 2 to 14 carbon atoms include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, citric acid, pimeric acid, azelaic acid, and sebacic acid. , may be any one or more selected from the group consisting of nonanoic acid, decanoic acid, dodecanoic acid and hexanodecanophosphoric acid. However, when an aliphatic polyhydric carboxylic acid having 2 to 14 carbon atoms is further included in order to improve dyeability for basic dyes, cellulose fibers and polyester fibers to be described later in the mixed yarn to be dyed may be dyed at normal pressure, but different types There may be a problem that a salt difference occurs between the fibers of the two-tone expression. Accordingly, it may be preferable to use only an aromatic polyhydric carboxylic acid having 6 to 14 carbon atoms as the acid component, and more preferably terephthalic acid as the acid component.

Next, sodium 3,5-dicarbomethoxybenzene sulfonate, which is a sulfonic acid metal salt, may be further included to improve dyeability for basic dyes and to enable dyeing at atmospheric pressure.

Next, 2-methyl-1,3-propanediol included in the diol component will be described.

Conventional modified polyester contains sulfonic acid metal salt to enable dyeing with basic dye at atmospheric pressure. However, composite false twist yarn twisted using this modified polyester has satisfactory drape properties, resilience, softness, and excellent tactile properties. There was a problem in that dyeability, color development, and elasticity were inferior. Accordingly, the inventor of the present invention, while continuing research to solve this problem, when 2-methyl-1,3-propanediol is included, when a composite false twisted yarn is manufactured using such a yarn, elasticity is significantly improved and excellent fastness is achieved. Due to this, it was found that excellent color development and dyeing properties were satisfied, and at the same time, drape properties, resilience properties, soft properties, and excellent tactile properties were satisfied, leading to the present invention.

A methyl group is additionally bonded to the second carbon of conventional 1,3-propanediol. In the case of 2-methyl-1,3-propanediol, the methyl group of the second carbon facilitates the rotation of the polymer main chain and acts as a terminal part of the polymer to widen the free space between the main chains. This has the same effect as preventing the meta-structure of isophthalic acid from forming a bent structure in the polymer main chain to become a crystalline polymer and having an atypical molecular structure.

According to a preferred embodiment of the present invention, in the case of the super yarn, 2-methyl-1,3-propanediol may be included in 4 to 14 mol% of the diol component, and more preferably in 9 to 12 mol%. can In addition, in the case of the examination, 2-methyl-1,3-propanediol may be included in 1 to 9 mol% of the diol component, more preferably 1 to 5 mol%.

In addition, preferably, as described above, the deviation of the mole % of 2-methyl-1,3-propanediol included in the first yarn and the examination should be 4 to 11 mole %, and thus the shrinkage characteristic can be improved and the first yarn and the examination Since all are modified with 2-methyl-1,3-propanediol, there are few disadvantages such as interlacing flaws in the fabric state due to the difference in dyeing between the two yarns. Since the difference in dyeing between the two yarns is reduced compared to the existing ones, uniform dyeing is possible and the effect of improving dyeability can be expected.

First of all, in the case of super yarn, if 2-methyl-1,3-propanediol is included in less than 4 mol% of the diol component, dyeing is not smooth at normal pressure, so color development may be reduced, and elasticity may be significantly reduced. can In addition, if 2-methyl-1,3-propanediol exceeds 14 mol% of the diol component, spinning workability is reduced or dyed due to deterioration of thermal properties such as the glass transition temperature of the polyester copolymer is significantly lowered. In the process, over-shrinkage of the polyester-based fiber may occur, and there may be a problem in that the desired physical properties cannot be realized, such as physical properties such as drape properties are not fully expressed in the mixed yarn.

Next, the diol having 2 to 8 carbon atoms included in the diol component will be described.

The diol having 2 to 8 carbon atoms may be an aliphatic diol component having 2 to 8 carbon atoms and/or polyethylene glycol, preferably an aliphatic diol component having 2 to 8 carbon atoms, and more preferably diethylene glycol. . If polyethylene glycol is used as a diol having 2 to 8 carbon atoms, the penetration of the dye is facilitated and a vivid color can be obtained, but it is not preferable because the dye easily comes out during dye transfer or washing and the fastness is low. can

The diol having 2 to 8 carbon atoms is preferably included in the diol component in an amount of 85 to 96% by weight. If the diol having 2 to 8 carbon atoms is included in an amount of less than 85% by weight, the dye permeability is lowered and the color development property after dyeing is lowered. In addition, when included in excess of 96% by weight, the viscosity and heat resistance of the polymer may be lowered, thereby reducing the efficiency of drying and spinning processes, and there may be a problem in that the strength of the prepared yarn may also be reduced.

Next, a sulfonic acid metal salt is demonstrated.

According to a preferred embodiment of the present invention, the sulfonic acid metal salt means a compound comprising a metal salt and a sulfonate group, and more preferably dimethyl-5-sulfoisophthalate, sodium 3,5- according to the purpose. It may be any one or more sulfonic acid metal salts selected from dicarbomethoxybenzene sulfonate, lithium 3,5-dicarbomethoxybenzene sulfonate, 5-sulfoisophthalic acid monosodium salt, etc., more preferably sodium dimethyl-5-sulfoisophthalate.

Through this, an anionic group is introduced into the polyester chain to provide a functional group capable of ion bonding with an ionic dye, particularly a cationic dye, to the composite fiber, thereby remarkably improving the dyeability of the cationic dye, and more improved color fastness. can be expressed. On the other hand, as the viscosity of the sulfonic acid metal salt increases during copolymerization, it has a high melt viscosity, but may have improved radioactivity by the diol having 2 to 8 carbon atoms included in the present invention, preferably ethylene glycol.

On the other hand, according to a preferred embodiment of the present invention, the polyester copolymer included in the second component may contain the acid component and the diol component in a molar ratio of 1: 0.8 to 2.0, more preferably 1: 1.0 to It may be included in a molar ratio of 1.4. If the molar ratio of the diol component to the acid component is less than 0.8, the degree of polymerization may be lowered or side-reactants may be generated in a large amount, and there may be problems in that elasticity is significantly reduced. In addition, if the molar ratio of the diol component to the acid component exceeds 2.0, there may be problems in that the degree of polymerization and elasticity are lowered or spinning operability is lowered.

In addition, according to a preferred embodiment of the present invention, the sulfonic acid metal salt may be included in an amount of 0.5 to 5 mol% compared to the polyester copolymer. If the sulfonic acid metal salt is less than 0.5 mol% with respect to the polyester copolymer, there may be a problem of poor dyeability for cationic dyes. In addition, if the sulfonic acid metal salt exceeds 5 mol% with respect to the polyester copolymer, a decrease in process efficiency, a decrease in spinning workability, and excessive generation of diethylene glycol, a process by-product, during the polymerization process of the copolymer Residual reactants cause problems such as trimming and increase in pack pressure during the spinning process.

In addition, the polyester copolymer may have a melting point of 220 to 260. If the melting point is less than 220, heat resistance is not good, and as the difference between the melting point and the first component increases, there may be a problem in that spinning operability is poor during composite spinning. In addition, when the melting point exceeds 260, there may be a problem in that the spinning operability is poor as the sulfonic acid metal salt is spun in a state that does not react uniformly with the polymer.

On the other hand, the total fineness of the composite false-twisted yarn is 20 ~ 120 Dare, the number of filaments may be 10 ~ 60. In addition, a single yarn fineness of the examination, and 2 to 4 denier, the single yarn fineness of chosa is 1-3 deniers, degree of orientation of the chosa is ^{30 × 10 -3 ~ 70 × 10} - it may be ^three days. In addition, the elongation at break of the examination may be 20 to 40%.

If the single yarn fineness of the core is less than 2 denier, manufacturing may not be easy, and if the single yarn fineness of the core exceeds 4 denier, elasticity and drape may be deteriorated.

If the single yarn fineness of the primary yarn is less than 1 denier or exceeds 3 denier, it may be difficult to exhibit the effects of the worn-out processed yarn such as appearance and touch, which are the object of the present invention. On the other hand, when the degree of orientation is ^{less than 30×10 -3,} the long-term storage of the yarn is difficult due to the severe change in physical properties over time. Dyeing may not be good. If the degree of orientation exceeds 70×10 ^{- 3} , it has characteristics close to drawn yarn, and is not suitable as the primary yarn of the composite false twisted yarn of the present invention. can

The polyester composite false twisted yarn according to the present invention has remarkably improved elasticity and excellent color fastness due to excellent fastness, and at the same time, in order to satisfy drape properties, rebound resilience, softness, and excellent tactile properties, the crimp elongation rate according to the following relational formula 1 It is preferable that this is 30% or more.

[Relational Expression 1]

Crimp elongation (%) = [(L2-L1)/L2] x 100

(The skein is immersed in non-water under no load for 30 minutes, dried in room temperature air, and after applying a load of 0.1 g/d for 2 minutes, remove the load and leave it for 10 minutes. The sample is placed under a load of 0.002 g/d for 2 minutes. After placing, measure the length (L1), add 0.1 g/d load to it, measure the length (L2) after 2 minutes, remove the 0.1 g/d load, and measure the length (L3) after 2 minutes. )

In addition, more preferably, the composite false-twisted yarn should have a wash fastness value of 4 or higher according to any one of the following cited standards.

*Citation standard

KS K 0903 General rule of test method for color fastness

KS K 0905 Attached white cloth for color fastness test

KS K 0910 Gray color table for contamination

K KS 0911 Standard gray color table for discoloration

K KS K ISO 105-F10 Textile-Dyeing Fastness-Multi-Fiber Textile Standard Attachment Table

Next, the present invention melts a first component comprising (1) polyethylene terephthalate (PET), and an acid component as a second component; Melting a component comprising a polyester copolymer copolymerized by including a diol component comprising a diol having 1 to 8 carbon atoms and 2-methyl-1,3-propanediol; and a sulfonic acid metal salt as a monomer; (2) composite spinning the molten first component and the second component to obtain a core yarn and a core yarn; and (3) manufacturing a composite false twist yarn through a false twisting process of the core yarn and the sheath yarn; The core yarn is a polyester-based latent crimp type drawn yarn, the first yarn is a polyester low-oriented yarn (LOY) or a partially-oriented yarn (POY), and the Provided is a method for producing a polyester-based composite false twist yarn having excellent color development and elasticity, characterized in that the content is different.

Hereinafter, it will be described in detail except for the content overlapping with the above-mentioned content.

First, the step (1) will be described.

The time of mixing the acid component, the diol having 2 to 8 carbon atoms among the diol component and the sulfonic acid metal salt is not limited to prepare the second component in step (1), and may further include a catalyst. The catalyst may be a catalyst typically used in the production of polyester, and is not particularly limited thereto, and as a non-limiting example, may be prepared under a metal acetate catalyst. In addition, the timing of adding 2-methyl-1,3-propanediol among the diol components is not limited, and may be added in the middle of the esterification reaction or may be mixed with the reactant after the esterification reaction is completed.

The second component of step (1) may be preferably prepared under a temperature of 200 to 270° C. and a pressure of 1100 to 1350 Torr. If the above conditions are not satisfied, there may be a problem in that an esterification reaction product suitable for a polycondensation reaction cannot be formed due to a long esterification reaction time or reduced reactivity.

In step (1), the acid component, the diol component, and the sulfonic acid metal salt contained in the second component are thickened and condensed. Preferably, the polycondensation reaction may be carried out at a temperature of 250 to 300° C. and a pressure of 0.3 to 1.0 Torr, and if the above conditions are not satisfied, there may be problems such as a reaction time delay, a decrease in polymerization degree, and thermal decomposition. can

In addition, a catalyst may be further included during the expansion/condensation reaction. As the catalyst, an antimony compound or a phosphorus compound may be used to prevent discoloration of color through thermal decomposition at high temperature in order to secure adequate reactivity and reduce production cost.

As the antimony compound, antimony oxides such as antimony trioxide, antimony tetraoxide, and antimony pentoxide, antimony trisulfide, antimony trifluoride, antimony trichloride, etc., antimony triacetate, antimony benzoate, antimontristearate, etc. Can be used.

The amount of the antimony compound used as the catalyst is preferably 100 to 600 ppm based on the total weight of the polymer obtained after polymerization.

As the phosphorus compound, phosphoric acid, trimethyl phosphoric acid, tributyl phosphoric acid, etc. and derivatives thereof are preferably used. Among them, trimethyl phosphoric acid, triethyl phosphoric acid, or triphenyl phosphoric acid is preferable because of its excellent effect, The amount of the phosphorus compound used is preferably 100 to 300 ppm based on the total weight of the polymer obtained after polymerization.

Next, the step of (2) composite spinning of the molten first component and the second component to obtain a composite fiber of core yarn and yarn will be described.

In the composite spinning, the spinning temperature may be preferably 240 ~ 300 ℃, more preferably 260 ~ 280 ℃, the spinning speed may be 2900 ~ 5100mpm.

According to a preferred embodiment of the present invention, the cross-sectional shape of the composite fiber spun through the step (2) may be a sheath-core type or a side-by-side type.

Barometrically, the composite fiber spun through the step (2) may be subjected to cooling and solidification steps. In this case, the speed of the cooling wind is preferably set at a speed of 15 to 40 mpm, and when it is out of the above range, it is difficult to control the cross-sectional shape of the fiber, and there is a problem that the uniformity cannot be improved.

Next, an emulsion may be supplied for smooth spinning and winding. For the supply of the oil, an oil spray method or an oil roller method can be used in a guide with a guide installed in the solidification area, and either method can be used.

According to a preferred embodiment of the present invention, after the supply of the emulsion, a partial stretching process or an stretching process may be further included. The latent crimp type drawn yarn through partial drawing or drawing process; and polyester-based low-oriented yarn (LOY) or partially-oriented yarn (POY).

Specifically, the partial stretching may be performed under the conditions of a primary godet roller speed of 2000 to 3500 mpm and a secondary godet roller speed of 2000 to 3500 mpm.

In addition, in the case of the stretching process, specifically, the primary godet roller speed may be 1,000 to 2,000 mpm, preferably 1,400 to 1,600 mpm. If the elongation speed of the primary godet roller is less than 1,000mpm, there is a problem in that the physical properties are deteriorated according to the change of the yarn over time, and the spinning tension is low due to the low primary godet roller speed, thereby causing a lot of yarn breakage. If the stretching speed exceeds 2,000 mpm, there is a fear that dyeing defects may occur due to non-uniform stretching. The temperature of the primary godet roller may be 60 ~ 120 ℃, preferably 80 ~ 100 ℃.

Next, the secondary godet roller speed may be 3,000 ~ 5,000 mpm, and preferably, the stretching speed may be 3500 ~ 4,500 mpm in consideration of spinning operability. If the speed of the second godet roller is less than 3,000mpm, the properties of the spun yarn, especially the elongation, are lowered and productivity is lowered. If it exceeds 5,000mpm, there is a risk of yarn breakage due to vibration in the second godet roller. have. The temperature of the secondary godet roller may be 110 ~ 170 ℃, preferably 130 ~ 150 ℃. If the heat setting temperature of the secondary godet roller is less than 110℃, there is a risk that physical properties such as elongation may change over time, and the yarn with a high shrinkage rate may cause overshrinkage during dyeing processing in the future fabric. , when it exceeds 160°C, there is a risk that the yarn vibration in the secondary godet roller increases, making it difficult to operate stably.

Next, the step of (3) manufacturing the composite false twisted yarn through the examination and the primary yarn false twisting process will be described. It is possible to manufacture a composite false-twisted yarn having excellent elongation by simultaneously twisting the core yarn and the first yarn manufactured as described above at the same time as stretching.

The false twisting process of step (3) may be preferably performed at a yarn speed of 200 to 500 m/min, more preferably at a yarn speed of 300 to 400 m/min. At this time, the draw ratio may be preferably 2 to 4, more preferably 2.5 to 3.5. The belt speed ratio may be 1.0 to 2.0. In addition, the first heater temperature may be preferably 120 ~ 230 ℃, more preferably 150 ~ 200 ℃. The second heater temperature may be preferably 100 ~ 200 ℃, more preferably 130 ~ 180 ℃. In addition, the interlace air pressure may be 1-4 kg/cm ² , the second overfeed is 2.0 to 3.0, and the third overfeed is preferably 3.0 to 5.0.

Furthermore, the present invention provides a fabric comprising any one of the polyester-based composite false twisted yarns. Such fabrics can form a spring-shaped crimp due to the difference in shrinkage characteristics according to the different polymers of the latent crimp type drawn yarn used as a core in the dyeing process, and thus a high degree of elasticity is expressed.

Example One

To prepare the esterification product, 92 mol% of ethylene glycol and 9 mol% of 2-methyl-1,3-propanediol were added as diol components, and 100 mol% of terephthalic acid was added as an acid component. At this time, the acid component and the diol component were added in a molar ratio of 1:1.2. In addition, 2 mol% of a compound containing a sulfonic acid metal salt was further added. Thereafter, the esterification reaction was carried out under conditions of 250 and 1140 Torr, and the reaction rate was 98%. The reaction product formed through this is transferred to the condensation/polymerization reactor, and 6 wt% of diethylene glycol is added thereto with respect to the second component, 100-500 ppm of antimony trioxide as a condensation/polymerization catalyst, and 100-400 ppm of phosphoric acid as a heat stabilizer The second component including the low melting point (LM) polyester was prepared by gradually reducing the pressure so that the final pressure was 0.5 Torr, raising the temperature to 285 and carrying out a condensation/polymerization reaction. The first component including the second component and polyethylene terephthalate (PET) was melted and composite spun to obtain a composite yarn, which is a polyester low-oriented yarn. In addition, it was carried out in the same manner as above, but 3-methyl-1,3-propanediol was added in 3 mol% of the diol component to obtain a polyester latent crimp string drawn yarn examination. Simultaneously drawing the above screening and first yarn, yarn speed 350m/min, draw ratio 3.17, belt speed ratio 1.620, first heater temperature 175°C, second heater temperature 155°C, interlace air pressure 3kg/cm ² , second overfeed 2.5 and second 3 A composite false twisted yarn was prepared by false twisting under the conditions of overfeed 4.0. In addition, the elastic composite false twisted yarn prepared in this way was twisted at 1200TM, and then weaved with 5032 warp yarns, warp density 102 yarns/inch, weft density 72 yarns/inch, and 2/2 twill, and other processing conditions are normal Fabrics were prepared according to the conditions.

Example 2 to 12

It was carried out in the same manner as in Example 1, but the content of 2-methyl-1,3-propanediol contained in the diol component included in the first yarn and the examination and the content of the sulfonic acid metal salt commonly included in the first yarn and examination are shown in Table 1 It was carried out under the conditions of ~2.

comparative example One

A polyester-based composite fiber was prepared in the same manner as in the method of manufacturing the core of Example 1.

comparative example 2

A polyester-based composite fiber was prepared in the same manner as in the method for preparing the first yarn of Example 1.

comparative example 3

A composite fiber was prepared in the same manner as in Comparative Example 1, but without sulfonic acid metal salt.

comparative example 4

Comparative Example 2 and A composite fiber was prepared in the same manner, but without sulfonic acid metal salt.

comparative example 5

It was carried out in the same manner as in Example 1, except that both the examination and the initial examination contained 9 mol% of 2-methyl-1,3-propanediol among the diol components.

comparative example 6

It was carried out in the same manner as in Example 1, except that both the examination and the first yarn did not contain a sulfonic acid metal salt.

Experimental example One. of crimp elongation (%) Measure.

The fiber skeins prepared in Examples and Comparative Examples were immersed in non-water under no load for 30 minutes, dried in room temperature air, and after applying a load of 0.1 g/d for 2 minutes, the load was removed and allowed to stand for 10 minutes. After placing the sample under a load of 0.002 g/d for 2 minutes, the length (L1) was measured, the load of 0.1 g/d was added thereto, and the length (L2) was measured after 2 minutes. Furthermore, after removing the load of 0.1 g/d, the length (L3) was measured 2 minutes later. The crimp elongation was calculated from the following Relational Expression 1, and it is shown in Table ~~.

Experimental example 2. of fabric elongation (%) Measure.

The fabric elongation (%) of the fibers prepared in Examples and Comparative Examples was measured according to JIS L 1096 B method (static load method), and is shown in Tables 1 to 3 below.

Experimental example 3. superhuman Dyeing observation.

The crystallinity, wash fastness, and color difference of the super yarn prepared in Examples were measured and shown in Tables 1 to 3 below. In Comparative Examples 1 and 2, crystallinity, wash fastness, and color difference of the composite fibers prepared in Comparative Examples 1 and 2 were measured.

Table 1.

Table 2.

Table 3.

Looking at Tables 1 to 3, the composite false twisted yarns prepared in Examples 1 to 5 have better crimp elongation of 32% or more, and even in the case of fabrics including such composite false twisted yarns, the fabric elongation is 20% or more, Both the dyeing appearance and soft touch properties are excellent. Accordingly, it has excellent advantages in mass production, workability and operability. From this, it can be seen that when the content difference of 2-methyl-1,3-propanediol contained in the diol component of the super yarn is 4 to 11 mol%, fibers and fabrics with excellent color development, elasticity, and other touch sensations can all be obtained. have. Specifically, in the case of Example 1, it can be seen that the washing fastness is the best grade 6, so the dyeability and color development are the best, and the other properties are also the best, so 2-methyl-1 included in the first yarn and the examination is the best. It can be seen that, when the content of ,3-propanediol is the same as in Example 1, elasticity and color development are simultaneously improved.

Next, in the case of Examples 6 to 9, the mass productivity, workability and operability are lower than that of Examples 1 to 5, and the washing fastness is also somewhat lower. Through this, the effect according to the content of 2-methyl-1,3-propanediol described above can be confirmed. In addition, in the case of Examples 8 and 9, the dyeing appearance was slightly lower than that of Examples 6 and 7, and through this, the content of 2-methyl-1,3-propanediol was out of 4 to 14 mol%. It can be seen that the color development property is slightly lower than when the content is included in the range of 4 to 14 mol%.

In addition, as in the case of Examples 10 to 12, it can be seen that when the content of the sulfonic acid metal salt included in the yarn and core exceeds 5 mol% of the polyester copolymer, a disadvantage in that the appearance of dyeing is somewhat deteriorated.

The composite false twisted yarn of the present invention is formed by using the composite fibers as the first and second yarns, respectively. When comparing the cases of Comparative Examples 1 and 2 and Example 1, the case of Example 1 showed excellent elasticity, dyeability, and color development. It can be seen that mass productivity, workability and operability are all excellent. Through this, it can be seen that Comparative Examples 1 and 2, which are composite fibers that have not been subjected to a false twisting process, have lowered properties in terms of generation, elasticity, and other properties compared to the present invention, which is a composite false twisted yarn. Specifically, FIG. 2 is an image of observing the dyeability of the fabrics according to Example 1 and Comparative Example 1. From the drawings, it can be seen that the color development property of Comparative Example 1 is significantly lowered compared to the case of Example 1, that is, the false twisting process is performed even with the composite fiber manufactured with the same ingredients and method as the core yarn or core yarn of the present invention. Without it, the desired effect of the present invention cannot be achieved. Through this, it can be confirmed that the false twisting process is inevitable in order to achieve the desired effect of the present invention.

In addition, in the case of Comparative Example 5, a composite false twisted yarn was prepared, but unlike in Examples 1 to 12, the content of 2-methyl-1,3-propanediol included in the diol component included in the core yarn and the first yarn was the same, Even in this case, it can be confirmed that not only the crimp elongation rate and washing fastness but also mass productivity, workability and operability are all lowered, so that it is impossible to manufacture a fiber having excellent color development and elasticity. In addition, in Comparative Examples 3, 4 and 6, no sulfonic acid metal salt was contained, but even in this case, the crimp elongation rate and washing fastness as well as mass productivity, workability and operability were all lowered, so that it was not possible to manufacture fibers with excellent color development and elasticity can confirm.

100 composite twisted yarn
110 screening
120 seconds

Claims (15)

The core yarn is a polyester-based latent crimp type drawn yarn, and the effect yarn is a polyester-based low-oriented yarn (LOY) or partially-oriented yarn (POY),
The core and sheath yarns are composite fibers comprising a first component and a second component with different heat shrinkage,
The first component includes polyethylene terephthalate (PET),
The second component is an acid component; A diol component comprising a diol having 2 to 8 carbon atoms and 2-methyl-1,3-propanediol; and a sulfonic acid metal salt; and a polyester copolymer copolymerized with a monomer,
A polyester composite false twist yarn having excellent color development and elasticity, characterized in that the content of 2-methyl-1,3-propanediol included in the screening and the first yarn is different.
According to claim 1,
The core yarn is a polyester having excellent color development and elasticity, characterized in that it comprises a polyester copolymer copolymerized with 1 to 9 mol% of 2-methyl-1,3-propanediol among the diol components. series composite false yarn.
According to claim 1,
The effect yarn is a polyester having excellent color development and elasticity, characterized in that it comprises a polyester copolymer copolymerized with 4- to 14 mol% of 2-methyl-1,3-propanediol among the diol components. series composite false yarn.
According to claim 1,
The polyester composite false twist yarn having excellent color development and elasticity, characterized in that the sheathing and core yarns are sheath-core type, side-by-side type or sea-island type.
According to claim 1,
In the polyester copolymer included in the second component, the acid component and the diol component are copolymerized in a molar ratio of 1:0.8 to 2.0, and the sulfonic acid metal salt is contained in an amount of 0.5 to 5 mol% compared to the polyester copolymer. Polyester composite false twist yarn with excellent color development and elasticity.
According to claim 1,
The acid component comprises at least one selected from the group consisting of aromatic polyhydric carboxylic acids having 6 to 14 carbon atoms and aliphatic polyhydric carboxylic acids having 2 to 16 carbon atoms. speaker.
7. The method of claim 6,
wherein the aromatic polyhydric carboxylic acid having 6 to 14 carbon atoms is at least one selected from the group consisting of terephthalic acid, dimethylisophthalic acid, isophthalic acid and dimethylterephthalic acid.
According to claim 1,
wherein the diol having 2 to 8 carbon atoms is at least one selected from the group consisting of ethylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol and 1,6-hexanediol. This excellent polyester-based composite false twisted yarn.
According to claim 1,
The total fineness of the composite twisted yarn is 20 ~ 120 denier, the single yarn fineness of the core is 2 ~ 4 denier, the single yarn fineness of the first yarn is 1 ~ 3 denier, and the orientation degree of the super yarn is 30 × 10 ^-3 ~ 70 × Polyester composite false twist yarn with excellent color development and elasticity, characterized in that 10 ^-3.
According to claim 1,
The composite false-twisted yarn is a polyester-based composite false-twist yarn having excellent color development and elasticity, characterized in that the crimp elongation according to the following relation 1 is 30% or more.
[Relational Expression 1]
Crimp elongation (%) = [(L2-L1)/L2] x 100
(The skein is immersed in non-water under no load for 30 minutes, dried in the air at room temperature, and a load of 0.1 g/d is applied for 2 minutes, then the load is removed and left for 10 minutes. After 2 minutes, measure the length (L1), add 0.1 g/d load, measure the length (L2) after 2 minutes, remove the 0.1 g/d load, and measure the length (L3) after 2 minutes measure.)
According to claim 1,
The composite false-twisted yarn is a polyester-based composite false-twisted yarn having excellent color development and elasticity, characterized in that the washing fastness value according to any one of the following cited standards is grade 4 or higher.
*Citation standard
KS K 0903 General rule of test method for color fastness
KS K 0905 Attached white cloth for color fastness test
KS K 0910 Gray color table for contamination
K KS 0911 Standard gray color table for discoloration
K KS K ISO 105-F10 Textile-Dyeing Fastness-Multi-Fiber Textile Standard Attachment Table
delete delete delete A fabric comprising a polyester-based composite false twisted yarn according to any one of claims 1 to 11.

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