KR20170112568A - Interior fiber, manufacturing method thereof, and blind including thereof - Google Patents

Abstract

The present invention provides an interior fiber, a method for producing the fiber, and a blind including the same. In the interior fiber comprising the polyester resin of the present invention, the polyester resin may be an acidic material containing 70 to 80 mol% of terephthalic acid and 20 to 30 mol% of isophthalic acid; Diol component; A P-based compound; And 2 to 6 molar ratio of the metal sulfonate salt and the P-based compound at a molar ratio of 1: 1 to 1: 1, respectively, and has excellent flame retardance, low melting point characteristics, and excellent dyeability.

Description

TECHNICAL FIELD [0001] The present invention relates to an interior fiber, a method of manufacturing the same, and blinds including the interior fiber, manufacturing method thereof, and blind including thereof,

More particularly, the present invention relates to an interior fiber, a method for manufacturing the fiber, and a blind including the same.

In general, curtains, wallpaper, carpets, flame-retardant non-woven fabrics, and other ornaments are made into flame-retarded fabrics and non-woven fabrics for safety, in places where people are densely packed, places with plenty of electric facilities, and places with many closed spaces. Therefore, in the conventional flame retardant yarn, the synthetic fiber was melt-elongated to prepare a synthetic fiber, and then the surface of each synthetic fiber was treated with a flame retardant agent so as not to burn due to flame. In addition, in the conventional method of flame-retarding treatment, the synthetic fiber is made into a fabric by using a weaving machine or a knitting machine, and then the surface of the fabric is treated with a flame retardant so as not to be ignited by fire. However, conventionally, since a flame retardant is applied to the surface of a synthetic fiber or a fabric, a flame retardant is easily removed depending on the time of use, and the flame retardant .

Therefore, a technique for manufacturing a fire retardant by mixing flame retardant components in the production of a burner is being studied and developed. However, in the polyester polymer composition having flame retardancy, the flame retardant should be dispersed and distributed uniformly in the polyester resin. However, since the flame retardant having limited flowability is not easily dispersed in the polyester resin, a desired flame retardant function can not be obtained.

In addition, in the case of the flame retardant fiber, there is a tendency to be used in interior decorating products. In the case of a product using a high-grade fabric, a high deliquescence property is required. In order to produce such a product, a complementary agent, a dye, / ≪ / RTI > fibers.

However, in the case of conventional flame retardant fibers and / or resins for producing the same, there is a problem that the physical properties of the flame-retardant fibers and / or fabrics produced by the additive composition for improving the color sharpness, the process and the like are reduced. For example, Korean Patent Laid-Open Publication No. 2005-0103617 discloses a flame-retardant polyester added with a complementary agent and imparted excellent color development during the dyeing process. In the dyeing process, hydrolysis of a flame- In addition, Korean Patent Laid-Open Publication No. 2003-0028022 describes a method for producing a polyester using a cacao dye, which requires pretreatment of a metal sulfonate salt to maintain spinnability in the preparation of a polyester polymer composition capable of dyeing with a cacao dye There is a problem in that when the modifier content is increased in order to improve the sharpness of the color, the physical properties of the yarn are lowered and the pack pressure is increased during the process.

On the other hand, in general, the synthetic fiber has a high melting point and its use is often limited. Particularly, when it is used as an adhesive such as a wick in the use of a fiber or the like, or as an adhesive which is inserted between cloths on a tape to be pressure bonded, the fiber fabric itself may be thermally deteriorated by heating, It is required to easily bond the substrates by a simple simple heating press without using such special equipment.

Conventional low-melting-point polyester short fibers have been extensively used in hot melt type binder fibers for the purpose of bonding different kinds of fibers to each other in a mutual fiber structure used in a mattress, an automobile interior or various nonwoven padding applications .

Therefore, there is a high demand for a polyester resin having a low melting point, and it is used for binder fibers and adhesives. For such applications, copolyesters which are generally copolymerized are used.

For example, United States Patent No. 4,129,675 discloses a low melting polyester copolymerized with terephthalic acid (TPA) and isophthalic acid (IPA), but isophthalic acid (IPA) There is a problem that the low melting point polyester using a large amount of isophthalic acid as a material has a high production cost and low competitiveness.

Japanese Unexamined Patent Application, First Publication No. Hei 10-298271 discloses that adipic acid is used instead of terephthalic acid in the polymerization process to increase the crystallinity and heat resistance, 1,4-butanediol (diol) is used as a diol component instead of ethylene glycol BD) is used to increase the adhesiveness and to provide a fiber having a low strength of the fiber at a high temperature. However, a low melting polyester produced by using adipic acid has a low melting point polyester having a melting point of 150 or less It is difficult to produce a low-melting-point polyester having a lower melting point.

Japanese Laid-Open Patent Publication No. 10-298271

Disclosure of the Invention The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a polyester resin composition which can improve the salt-forming ability of a polyester resin and alleviate processing conditions such as processing temperature, It is an object of the present invention to provide an interior fiber which is melted at a temperature and has a high heat bonding strength, a method for producing the same, and a blind including the same.

In an interior fiber comprising a polyester resin provided in an aspect of the present invention, the polyester resin includes 70 to 80 mol% of terephthalic acid and 20 to 30 mol % of isophthalic acid Acids; Diol component; A P-based compound represented by the following formula (1); And a metal sulfonate salt, wherein the metal sulfonate salt and the P-based compound are contained in a molar ratio of 1: 2 to 6: 1.

[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH.

In one preferred embodiment of the present invention, the diol component may include an aliphatic diol having 2 to 20 carbon atoms.

In one preferred embodiment of the present invention, the aliphatic diol is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol , Nonane methylene glycol, decamethylene glycol, undecamethylene glycol, dodecamethylene glycol, tridecamethylene glycol, and the like.

As one preferred embodiment of the present invention, it may further comprise at least one additive selected from the group consisting of a metal catalyst represented by the following formula (2), a heat stabilizer, a chain extender, a light stabilizer, and potassium hydroxide.

(2)

In Formula 2, R ² is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 to 6 carbon atoms, an alkoxy group having 1 to 2 carbon atoms, or a phenyl group.

In one preferred embodiment of the present invention, the additive may include 100 to 500 ppm of the polyester resin.

In one preferred embodiment of the present invention, the acid component and the diol component may be polymerized in a molar ratio of 1: 1.2 to 1.5.

In one preferred embodiment of the present invention, the compound represented by Formula 1 may be contained in the polyester resin in an amount of 5,000 to 7,000 ppm (based on the P content of the compound).

In one preferred embodiment of the present invention, the polyester resin has a melting temperature of 110 to 130 ° C and a limiting oxygen index (LOI) of 27% to 37% in accordance with KSM ISO 4589-2 .

Another aspect of the present invention provides a method for producing an interior fiber. The method comprises: a first step of pre-crystallizing the polyester resin at a temperature of 40 to 80 DEG C for 2 to 8 hours; Removing the moisture and crystallizing the pre-crystallized polyester resin at a temperature of 60 to 100 캜; And 3) spinning the crystallized polyester resin at a temperature of 260 to 290 DEG C at a spin speed of 4,000 to 5,000 mpm, wherein the polyester resin comprises 70 to 80 mol% of terephthalic acid, 20 to 30 mol% of isophthalic acid; Diol component; A P-based compound represented by the following formula (1); And a metal sulfonate salt, wherein the metal sulfonate salt and the P-based compound are contained in a molar ratio of 1: 2 to 6: 1.

[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH.

Another aspect of the present invention provides a blind. The blinds include the interior fibers according to the present invention.

INDUSTRIAL APPLICABILITY The fiber for interior, the method for producing the same, and the blind including the same according to the present invention have an effect of melting at a low temperature, excellent in heat bonding strength, excellent in flame retardancy, and excellent in dyeability.

1 is a cross-sectional view of a blind according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

로 표현된 화학식에서, R₁은 독립적으로 수소원자, 메틸기 또는 에틸기이며, a는 1 ~ 3이다"라고 치환기에 대해 표현되어 있을 때, a가 3인 경우, 복수의 R¹, 즉 R¹ 치환기가 3개가 있고, 이들 복수 개의 R¹들 각각은 서로 같거나 다른 것으로서, R¹들 각각은 모두 수소원자, 메틸기 또는 에틸기일 수 있으며, 또는 R¹들 각각은 다른 것으로서, R¹ 중 하나는 수소원자, 다른 하나는 메틸기 및 또 다른 하나는 에틸기일 수 있음을 의미하는 것이다. 그리고, 상기 내용은 본 발명에서 표현된 치환기를 해석하는 일례로서, 다른 형태의 유사 치환기도 동일한 방법으로 해석되어야 할 것이다.In the present invention,

Lt; RTI ID = 0.0 > R ₁ is independently a hydrogen atom, a methyl group or an ethyl group, a is 1 to 3, "when a is 3, there are a plurality of R ¹ , that is, R ¹ substituents, Each of R ¹ s may be the same or different and each of R ¹ s may all be a hydrogen atom, a methyl group or an ethyl group, or each of R ¹ s are different and one of R ¹ is Hydrogen atom, the other is a methyl group, and the other is an ethyl group. The above is an example of interpreting the substituent represented by the present invention, and other similar substituents should also be interpreted in the same way.

The interior fiber according to an embodiment of the present invention may include an acid component containing 70 to 80 mol% of terephthalic acid and 20 to 30 mol% of isophthalic acid, a diol component, a P Based compound, and a metal sulfonate salt, wherein the P-based compound and the metal sulfonate salt are contained at a molar ratio of 1: 2 to 6.

[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH.

The acid component includes 70 to 80 mol% of terephthalic acid and 20 to 30 mol% of isophthalic acid. At this time, the low-melting-point flame-retardant polyester polymer composition having excellent dyeability according to an embodiment of the present invention exhibits low melting point characteristics by including an acid component including terephthalic acid and isophthalic acid. At this time, the inclusion of a P-based compound described below can exhibit an excellent low-melting-point characteristic despite having a lower isophthalic acid content than conventional techniques.

If the content of the terephthalic acid in the acid component is less than 70 mol%, the content of isophthalic acid increases accordingly, which is not economical in terms of cost. If it exceeds 80 mol%, the effect of lowering the melting point may be limited, Can be lowered, and the radiation characteristic upon irradiation can be lowered.

If the content of the isophthalic acid in the acid component is less than 20 mol%, the effect of lowering the melting point may be limited, so that the adhesive property may be deteriorated and the spinning property upon spinning may be deteriorated. If it exceeds 30 mol%, the content of expensive isophthalic acid becomes large, which is disadvantageous in terms of cost.

The aliphatic diol may include an aliphatic diol having 2 to 20 carbon atoms. Wherein the aliphatic diol is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, Undecamethylene glycol, undecamethylene glycol, tridecamethylene glycol, tridecamethylene glycol, undecamethylene glycol, undecamethylene glycol, undecamethylene glycol, undecamethylene glycol, undecamethylene glycol, and tridecamethylene glycol, and more preferably one or more selected from ethylene glycol, diethylene glycol, propylene glycol and butylene glycol.

The acid component and the diol component may be reacted at a molar ratio of 1: 1.2 to 1.5, more preferably 1: 1.25 to 1.35. If the molar ratio of the aliphatic diol is less than 1.2, the yield of the polyester resin may be low. If the aliphatic diol is used in an amount exceeding 1.5 mol, the unreacted aliphatic diol may increase the cost of the unreacted aliphatic diol.

In the present invention, the compound represented by the general formula (1) serves to increase the flame retardancy of the polyester resin. At the same time, the inclusion of the compound represented by the general formula (1) improves the effect of lowering the melting point by isophthalic acid in the acid component. That is, by including the compound represented by the formula (1) in the polyester polymer composition according to one embodiment of the present invention, the acid component can exhibit low melting point characteristics even when the content of isophthalic acid is low, There is an effect that can be made.

In this case, the amount of the compound represented by Formula 1 is preferably 5,000 to 7,000 ppm (based on the P content of the compound), preferably 5,200 to 6,500 ppm (based on the P content of the compound) , More preferably 5,500 to 6,300 ppm (based on the P content of the compound). At this time, when the amount of the compound represented by the formula (1) is less than 5,000 ppm (based on the P content of the compound), sufficient flame retardancy can not be ensured and the effect of lowering the melting point is insufficient. In addition, when the amount exceeds 7,000 ppm (based on the P content of the compound), excessive P content may cause a defective reactivity during the polymerization reaction, which may cause problems such as lowering of heat resistance and viscosity due to weakened reactivity of the polymer chip. In the final product, the reduction of the objectivity may occur, which may cause a problem of process passability due to yarn breakage in weaving and circular knitting, so it is preferable to use within the above range.

[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH, Wherein R ¹ is -CH ₂ COOH, -CH ₂ CH ₂ COOH, or -CH ₂ CH ₂ CH ₂ COOH.

The metal sulfonate serves to enhance the salt-forming ability so as to exhibit a clear color through ionic bonding with cations in ions, particularly cationic dyes in the dye. The amount of the metal sulfonate used is 3.0 to 5.0 molar ratio relative to 1 molar ratio of the acidic salt , Preferably from 3.225 to 4.515 molar ratio, more preferably from 3.5 to 4.2 molar ratio. If the amount of the metal sulfonate is less than 3.0 mol, a sufficient salt-improving effect may not be exhibited. If the amount of the metal sulfonate used is more than 5.0 mol, the amount of the metal sulfonate is too large and the limiting oxygen index of the polyester resin becomes low. There may be a problem in that the mechanical properties of the resin are lowered. In addition, the metal sulfonate may include at least one selected from the group consisting of dimethyl 5-sodiosulfoisophthalate, sodium 3,5-dicarbomethoxybenzenesulfonate, and dicarbomethoxybenzenesulfonate.

The polyester polymer composition according to an embodiment of the present invention may further comprise at least one metal catalyst selected from the group consisting of Mg acetate, Ge acetate, and Zn acetate, , Preferably a metal catalyst represented by the following formula (2). When the metal catalyst is used, the amount of the metal catalyst is preferably 100 to 500 ppm, and more preferably 150 to 400 ppm, based on the total weight of the mixture.

(2)

In Formula 3, R ² is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 to 6 carbon atoms, an alkoxy group having 1 to 2 carbon atoms, or a phenyl group, preferably a hydrogen atom, Or a cycloalkyl group having 5 to 6 carbon atoms, and more preferably an alkyl group having 1 to 2 carbon atoms.

In addition, the flame retardant polyester polymer composition may further contain a heat stabilizer, a defoaming agent, an antioxidant, a lubricant, a light stabilizer, a hydrolysis stabilizer, a release agent, a pigment, an antistatic agent, a conductivity imparting agent, an EMI shielding agent,  And further adding at least one additive selected from the group consisting of an antimicrobial agent, a processing aid, a metal deactivator, a suppressing agent, a fluorine-based antistatic agent, an anti-friction agent, a wear-resistant agent and a coupling agent.

In the present invention, the heat stabilizer may be a conventional heat stabilizer used in the art, preferably trimethylphosphate, triethylphosphate, tributylphosphate, tributoxy (1) selected from the group consisting of tributoxyethyl phosphate, tricresyl phosphate, triaryl phosphate isopropylated, and hydroquinone bis- (diphenyl phosphate). Or a mixture of two or more species.

Meanwhile, a method for producing an interior fiber according to an embodiment of the present invention includes: a first step of pre-crystallizing the above-mentioned polyester resin at a temperature of 40 to 80 ° C for 4 to 8 hours; Removing the moisture and crystallizing the pre-crystallized polyester resin at a temperature of 60 to 100 캜; And spinning the crystallized polyester resin at a temperature of 260 to 280 DEG C at a spin speed of 4,000 to 5,000 mpm.

In the first step, the above-mentioned polyester resin is pre-crystallized at a temperature of 40 to 80 DEG C for 4 to 8 hours. If the primary drying temperature is lower than 40 ° C, preliminary crystallization of the polyester resin is insignificant, so that fusing may occur between the polyester resins during two stages of drying, and when the temperature exceeds 80 ° C, side reactions may occur.

In the second step, moisture removal and crystallization are performed at a temperature of 60 to 100 ° C. If the temperature of the water removal and crystallization process is less than 60 ° C, the removal of moisture is insignificant, and fiber formation may be difficult due to hydrolysis during spinning. When the temperature exceeds 100 ° C, pyrolysis and viscosity decrease, .

In the above step 3, the water-removed and crystallized polyester resin is spun at a temperature of 260 to 290 at a spinning speed of 4,000 to 5,000 mpm. If the spinning temperature condition is less than 250 ° C, fiber formation may be difficult, and if it exceeds 300 ° C, the strength characteristics of the fiber may be deteriorated.

1 is a cross-sectional view of a blind according to an embodiment of the present invention.

Referring to FIG. 1, the blind of the present invention may be manufactured by joining a first fabric 100 woven using interior fibers according to the present invention and a second fabric 200 used for a conventional blind. At this time, the first fabric 100 and the second fabric 200 may be fused and bonded to the second fabric 200 through heat fusion.

Hereinafter, exemplary embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are intended to aid understanding of the present invention, and the present invention is not limited by the following experimental examples.

[ Example ]

Example  1: Flame retardant polyester Polymer  Preparation of composition

An acid component containing 75 mol% of terephthalic acid (TPA) and 25 mol% of isophthalic acid (IPA) and ethylene glycol as a diol component were added at a molar ratio of 1: 1.4, and a P system Compound (4 mol% based on P content); And a metal sulfonate salt, sodium methyl 5-sodiosulfoisophthalate, wherein the metal sulfonate and the P-based chemical are contained in a molar ratio of 1: 4 to prepare a copolymerized flame retardant polyester resin.

Then, the polyester resin is preliminarily dried at 60 ° C for 6 hours, dried at 80 ° C, and then LM CD FRS-DSD 140/48 fiber is prepared at a spinning temperature of 260 ° C and a continuous speed of 4,500 mpm. At this time, in order to improve the cardiovascular property, the Y-type detachment is used for the irradiation. Then, weaving was carried out with weft yarns (140/48) and warp yarns (280/96) using the interior yarns that had been spun to produce interweaving fabrics.

[Chemical Formula 1]

In the above formula (1), R ¹ is -CH ₂ CH ₂ COOH.

Example  2

Was prepared in the same manner as in Example 1 except that lithium acetate was added at a concentration of 300 ppm as a metal catalyst in the copolymerization to prepare a polyester resin.

Example  3 to 5

The polyester resin was prepared in the same manner as in Example 1 except that the conditions of terephthalate, isophthalate, diol component, P-based compound and metal sulfonate were changed as shown in Table 1 below.

Comparative Example  1-2

The polyester resin was prepared in the same manner as in Example 1 except that the conditions of terephthalate, isophthalate, diol component, P-based compound and metal sulfonate were changed as shown in Table 1 below.

< Experimental Example  1- Melting point measurement>

The melting point of the flame-retardant polyester compositions prepared in Examples 1 to 5 and Comparative Examples 1 and 2 was measured at a room temperature by a temperature raising process.

< Experimental Example  2 - Evaluation of radiation characteristics>

The flame-retardant polyester compositions prepared in Examples 1 to 5 and Comparative Examples 1 and 2 were spin-coated at a temperature of 280 ° C at a spinning speed of 1350 mpm,

< Experimental Example  3 - Flammability measurement>

The flame retardancy of the polyester fibers was measured using a UL 94-AVH chamber with the method of KS M 3305.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Acid component TPA content (mol%) 75 75 71 78 75 75 90 IPA content (mol%) 25 25 29 22 25 25 10 Acid component: Diol component molar ratio 1: 1.14 1: 1.14 1: 1.14 1: 1.14 1: 1.14 1: 1.14 1: 1.14 Whether metal catalyst is included × ○ × × × × × P-based compound content (mol% based on P content) 4 4 4 4 6 × 4 P system compound: metal catalyst mole ratio 1: 4 1: 4 1: 4 1: 4 1: 4 - 1: 4 Melting point (캜) 112 110 114 116 110 158 150 Limit Oxygen Index (%) 33 35 32 331 36 25.6 24 Flammability ^{1 )} V1 V1 V1 V1 V1 V2 V2 Radiation characteristics ^{2 )} ◎ ○ ○ ◎ ◎ × △ 1) V1: Excellent V2: Normal
2)?: Very excellent,?: Excellent,?: Fair, X: poor

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that the present invention, Various modifications and variations are possible.

Claims (10)

In an interior fiber comprising a polyester resin,
The above-
An acidic component comprising 70 to 80 mol% of terephthalic acid and 20 to 30 mol % of isophthalic acid;
Diol component;
A P-based compound represented by the following formula (1); And
Metal sulfonate;
Wherein the metal sulfonate and the P-based compound are copolymerized in an amount of 1: 2 to 6 molar ratio.
[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH. The method according to claim 1,
Wherein the diol component comprises an aliphatic diol having 2 to 20 carbon atoms. 3. The method of claim 2,
Wherein the aliphatic diol is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, trimethyl glycol, tetramethylene glycol, pentamethyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, And at least one member selected from the group consisting of dodecamethylene glycol, undecamethylene glycol, undecamethylene glycol, and tridecamethylene glycol. The interior fiber according to claim 1, further comprising at least one additive selected from a metal catalyst represented by the following formula (2), a heat stabilizer, a chain extender, a light stabilizer, and potassium hydroxide.
(2)

In Formula 2, R ² is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 to 6 carbon atoms, an alkoxy group having 1 to 2 carbon atoms, or a phenyl group. 5. The method of claim 4,
Wherein the additive comprises 100 to 500 ppm of the polyester resin. The method according to claim 1,
Wherein the acid component and the diol component are polymerized in a molar ratio of 1: 1.2 to 1.5. The method according to claim 1,
Wherein the compound represented by the formula (1) is contained in the polyester resin in an amount of 5,000 to 7,000 ppm (based on the P content of the compound). The method according to claim 1,
Wherein the polyester resin has a melting temperature of 110 to 130 DEG C and a limiting oxygen index (LOI) of 27% to 37% in accordance with KSM ISO 4589-2. A step of pre-crystallizing the polyester resin composition at a temperature of 40 to 80 DEG C for 2 to 8 hours;
Two steps of removing water and crystallizing the pre-crystallized polyester resin composition at a temperature of 60 to 100 ° C; And
And 3) spinning the crystallized polyester resin composition at a temperature of 260 to 290 DEG C at a spin speed of 4,000 to 5,000 mpm,
The above-mentioned polyester resin composition,
An acidic component comprising 70 to 80 mol% of terephthalic acid and 20 to 30 mol% of isophthalic acid;
Diol component;
A P-based compound represented by the following formula (1); And
Metal sulfonate;
Wherein the metal sulfonate and the P-based compound are contained in a molar ratio of 1: 2 to 6: 1.
[Chemical Formula 1]

In the above formula (1), R ¹ is -OH, -COOH, -CH ₂ COOH, -CH ₂ CH ₂ COOH, -CH ₂ CH ₂ CH ₂ COOH or -CH ₂ CH ₂ CH ₂ CH ₂ COOH. A blind comprising the interior fibers of any one of claims 1 to 8.

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