KR102073657B1 - Polyester wig filament having excellent mechanical property and curl and Manufacturing method thereof - Google Patents

Abstract

The present invention relates to a polyester wig yarn and a manufacturing method thereof and, more specifically, to a polyester wig yarn having improved mechanical properties and the like by introducing a polyester resin having specific properties.

Description

Polyester wig filament having excellent mechanical property and curl and Manufacturing method

The present invention relates to a polyester wig yarn made of a specific polyester resin to improve mechanical properties and curling properties and a method of manufacturing the same.

Synthetic fibers used as wig yarns include PVC (polyvinylchlride), modacryl, PET (polyethyleneterephthalate), and PP (polypropylene). These synthetic fiber materials are steadily developed to satisfy functional and aesthetic elements such as flame retardancy, heat resistance, curling property, gloss, touch and color.

Among these, PVC is a widely used yarn developed by melt spinning method, and has good shape stability and good feel, but has a disadvantage of being heavy and inferior in volume. Modacrylic has a good curling effect and a voluminous feel, but wrinkles are made by utilizing the advantages of flame retardancy. Good bye and light. In particular, the acrylic fiber has a problem that the thermal stability is lowered because the glass transition temperature is low.

Therefore, a fiber based on polyester, which is represented by polyethylene terephthalate having excellent heat resistance, was developed. The hair fiber made of polyester resin has excellent curling ability, style stability, elastic modulus, color and glossiness due to high glass transition temperature. It is evaluated as a superior material than other hair fibers for its goodness and easy setting after heat fixing. However, polyester resins have disadvantages such as poor texture due to high elastic modulus, difficulty in dyeing, entanglement caused by static electricity, and rapid combustion after ignition. need.

As a method of improving flame retardancy to polyester fibers, a method of imparting flame retardancy by adding a reactive flame retardant together with a raw material during polyester polymerization or mixing a flame retardant additive with a polyester resin during molding, and largely halogen-containing as a flame retardant additive Compounds, mixtures of metal oxides, nitrogen-containing compounds and phosphorus-containing compounds. Of these, halogen-based flame retardants are relatively easy to express flame retardancy, but problems such as toxicity and discoloration occur. Phosphorus-based flame retardants have low thermal stability and difficulty in increasing polymerization degree, resulting in poor workability. Due to the needs of the high temperature, increase in flame retardant content or increase the flame retardant treatment time, such problems as cost increases, productivity decreases or physical properties decrease.

Various wig yarn technologies have been developed to improve workability, processability, heat resistance, flame retardancy, and physical properties of wig yarns, while being harmless to the human body.Wig yarns of PET resin-based polyester resins have adequate flame retardancy. There was a problem of poor mechanical properties and / or curling properties.

Korean Patent Publication No. 2011-0108974 (2011.10.06) Korean Patent Publication No. 10-1725481 (2017.04.05)

Accordingly, the present inventors have found that by using a polyester wig yarn of a polyester material in a specific composition and composition ratio, the wig yarn having excellent curling property can be produced while improving strength and elongation. That is, the present invention is to provide a polyester wig yarn excellent in mechanical properties and curling properties and a method of manufacturing the same.

The present invention for solving the above problems is one step of preparing a mixed resin comprising a flame retardant, a heat stabilizer, a process stabilizer and a polyester resin; Injecting the mixed resin into a melt extruder having a plurality of metal mesh filters inserted therein, and then melt spinning and manufacturing a filament; And three steps of drafting the spun filament.

It is also an object of the present invention to provide a wig yarn having a strength of 3.0 to 3.5 g / d and an elongation of 65 to 72% when the fineness is 50 denier as a polyester wig yarn having excellent mechanical properties and curling properties.

In addition, another object of the present invention includes a flame retardant, a heat stabilizer, a process stabilizer and a polyester resin, the polyester resin is to provide a resin composition for producing a polyester wig yarn of the high viscosity PET resin and low viscosity PET.

The polyester wig yarn of the present invention has a very low number of times of trimming during spinning in the manufacturing process, and has excellent self-extinguishing and drip resistance during printing, and excellent mechanical properties (strength, elongation) and curling properties, and high durability. And curl formability, curl retention and curl elasticity.

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

The resin composition used for the polyester wig yarn of the present invention includes a flame retardant, a heat stabilizer, a process stabilizer and a polyester resin.

The flame retardant may be used a flame retardant which is generally used in the production of wig yarn, preferably one or two selected from phosphorus flame retardant and polymer bromine-based flame retardant may be used, more preferably polymer bromine-based It is advisable to use flame retardants.

And, the content of the flame retardant is preferably 15 to 20% by weight, preferably 16 to 19.5% by weight, more preferably 17 to 18.5% by weight of the total weight of the resin composition, if the flame retardant content is less than 15% by weight wig It may not be able to secure sufficient flame retardancy of the yarn, and if used in excess of 20% by weight may cause a problem that the curling property is lowered, it is better to use within the above range.

In addition, the polymeric brominated flame retardant may be a bromine content of 40 to 80% by weight, preferably a bromine content of 55 to 75% by weight, more preferably 58 to 70% by weight of a polymeric brominated flame retardant. And, the polymeric brominated flame retardant is a weight average molecular weight (Mw) 10,000 ~ 120,000, preferably Mw 30,000 ~ 95,000, more preferably Mw 55,000 ~ 95,000, wig yarn self-extinguishing, melt-dripping inhibitory, It is advantageous in terms of fiber formability, good heat deformation temperature of wig yarn. If the Mw of the polymeric brominated flame retardant is less than 10,000, self-extinguishing may be obtained, but may not function as an anti-dripping function during ignition.

Specifically, the polymeric brominated flame retardant may be one or more selected from among polystyrene bromo flame retardants, polybromoepoxy flame retardants, polybromphenoxy flame retardants, polybromocarbonate flame retardants, and polybromoacrylate flame retardants. For example, it is preferable to use a polybromoepoxy or polybromophenoxy flame retardant composed of a polymer of bisphenol A diglycidyl ether and bromide bisphenol A.

The polymer bromine-based flame retardant has a melting temperature of 200 ~ 230 ℃, because the melt spinning temperature of the polyester resin is in the range of about 270 ~ 330 ℃ because the melting temperature of the polyester resin is 70 ~ 100 ℃ higher than the flame retardant melting temperature Pyrolysis is likely to occur because of kneading under a large shear force inside the cylinder of the extruder. When pyrolysis occurs, a three-dimensional crosslinked material is formed and causes gelation. When long-term operation, these materials block the fine nozzle hole and become impossible to radiate. The fine material passing through the nozzle hole accumulates around the nozzle hole and eventually acts as an obstacle to polymer flow, causing fine yarn and howitzer. This causes the deterioration of productivity and the unevenness of the produced wig yarn.

Accordingly, the present invention minimizes the generation of radicals, which are pyrolysis products of the resin composition for wig yarn production, improves compatibility between polyester resins and flame retardants, and prevents adhesion on metal surfaces such as cylinders, screws, and nozzles of melt extruders of flame retardants. Spinning is performed using Iganox 1010 as a heat stabilizer and Structol TR 065 as a process stabilizer. These additives can achieve a significant improvement when using a polybromoepoxy flame retardant or a polybromophenoxy flame retardant.

At this time, the addition amount of the heat stabilizer and the process stabilizer is preferably used in the 500 ~ 5,000ppm range in the resin composition for wig yarn manufacturing, more preferably in the range of 700 ~ 2,000ppm.

Polyester resins used for wig yarns include polyetherene terephthalate (PET) resins, polybutylene terephthalate (PBT) resins, polypropylene terephthalate (PPT) resins, polynaphthalene terephthalate (PEN) resins or poly Cyclohexanedimethanol terephthalate (PCT) resin and the like are known, but the present invention is used as a PET resin by mixing a PET resin having an intrinsic viscosity (IV) difference of 0.15 to 0.25, preferably an intrinsic viscosity (IV) difference of 0.17 to 0.22 do. In this case, when the intrinsic viscosity difference is less than 0.15 or more than 0.25, it may be difficult to manufacture a wig yarn having curling properties and mechanical properties to be obtained.

Specifically, 20 to 35 parts by weight of the low viscosity PET resin having an intrinsic viscosity (IV) of 0.50 to 0.60, preferably 100 parts by weight of the high viscosity PET resin with respect to 100 parts by weight of the intrinsic viscosity (IV) of 0.75 to 0.90. For the parts, 25 to 32 parts by weight of the low-viscosity PET resin is mixed and used, wherein the low-viscosity PET resin amount is less than 20 parts by weight, the curling effect may not be improved, and when used in excess of 35 parts by weight Since the number of trimming can increase and the elongation can decrease, it is better to use the above range.

In addition, the polyester resin used in the wig yarn may further include polycyclohexylene dimethylene terephthalate (PCT) in addition to the high viscosity and low viscosity PET resin in order to improve the feel and appearance quality of the wig yarn. The amount of PCT used may include 1 to 10 parts by weight, preferably 5 to 10 parts by weight, and more preferably 6 to 9 parts by weight, based on 100 parts by weight of the high viscosity PET. In this case, when the amount of PCT resin is less than 1 part by weight, the amount of the amount of the PCT resin may be so small that the appearance quality improvement effect of the wig yarn may not be seen. It may be a problem to decrease the physical properties of the wig yarn to be used within the above range.

Wig yarn of the present invention is a step 1 to prepare a resin composition (or mixed resin) for producing a polyester wig yarn described above; Injecting the mixed resin into a melt extruder having a plurality of metal mesh filters inserted therein, and then melt spinning and manufacturing a filament; And three steps of drafting the spun filament.

In producing polyester wig yarn, the two stage melt extruder is suitable for single screw extruder, and the screw is suitable for fulphrite screw. This screw is usually used for polyester fiber melt spinning. In the present invention, the fiber forming property when melt spinning the mixed resin is dependent on the compression ratio of the screw. The compression ratio of the screw with good processability is 4.5-6.8, Preferably it is 5.0-6.5, More preferably, it is 5.5-6.5. If the compression ratio is 4.5 or less, the kneading state is poor. If the compression ratio is 6.5 or more, the discharge amount decreases, resulting in a problem of lowering productivity.

In addition, the density of the metal mesh filter was adjusted at the screw tip in order to enhance the kneading effect and effectively remove the pyrolysis oxide together with the screw compression ratio of the melt extruder. Conventionally, three 100-200 mesh filters were used by overlapping, but in the present invention, three to four 300-400 mesh filters were inserted in front of the breaker plate. In the case of a compact filter, the kneading effect is improved by increasing the back pressure in the cylinder, and the removal of pyrolysis material is effective, but the discharge amount is reduced and the pyrolysis may be accelerated at 400 mesh or more.

In the melt spinning process, draft refers to the elongation of the yarn until the molten polymer is wound up out of the nozzle hole. That is, it can be displayed by the discharge speed / spinning speed of the molten polymer in the nozzle hole. In the spinning process of melt spinning a mixed resin to produce a wig yarn, a draft ratio is important for continuously producing a wig yarn having a uniform fineness for a long time, and the draft ratio depends on the composition and composition ratio of the resin. The present suitable draft ratio to be used is 5-40, Preferably it is 5-25, More preferably, it is 12-25. If the draft ratio is 5 or less, the productivity is significantly reduced, and it is difficult to control thread shaking at the lower portion of the nozzle, so that there is a problem in that trimming occurs. If the draft ratio is more than 40, the number of trimming increases rapidly, and the fineness unevenness problem occurs, which significantly reduces the strength and loses the value as a wig yarn.

The wig yarn of the present invention prepared in this way has a strength of 2.70 to 3.50 g / d and an elongation of 65 to 72%, preferably an intensity of 2.75 to 3.35 g / d and an elongation of 66.5 to 72% when the fineness is 50 denier (de). More preferably, the strength may be 2.80 to 3.30 g / d and elongation 67.0 to 70.0%. And the wig yarn of the present invention is not only excellent in curlability, but also excellent in curl retention formed. In addition, the oxidation start time was measured at 200 ° C. using an oxygen induced time (OIT). The long-term heat resistance was very good at 85 minutes or more.

The invention can be better understood by the following examples, which are intended to illustrate the invention and are not intended to limit the scope of protection defined by the appended claims.

EXAMPLE

Preparation Example 1-1 Preparation of Polyester Master Batch Chip

A polyester master batch chip containing 28 parts by weight of a low viscosity PET resin having an intrinsic viscosity (IV) of 0.58 having an intrinsic viscosity (IV) of 0.78 was prepared.

Preparation Example 1-2-Preparation Example 1-5

To prepare a polyester master batch chip containing a high viscosity PET resin and a low viscosity PET resin as shown in Table 1 below, Preparation Examples 1-1 to 1-5 were carried out.

Comparative Preparation Example 1-1

The polyester chip | tip containing the high viscosity PET resin of 0.78 which is intrinsic viscosity (IV) alone was prepared, and the comparative preparation example 1-1 was performed.

In addition, polyester master batch chips containing a high viscosity PET resin and a low viscosity PET resin as shown in Table 1 below were prepared, and preparation examples 1-2 to 1-5 were performed.

division Preparation Example 1-1 Preparation Example 1-2 Preparation Example 1-3 Preparation Example 1-4 Preparation Example 1-5 High viscosity PET resin Intrinsic viscosity 0.78 0.78 0.78 0.83 0.75 Parts by weight 100 100 100 100 100 Low Viscosity PET Resin Intrinsic viscosity 0.58 0.58 0.58 0.58 0.60 Parts by weight 28 34 23 28 28 Intrinsic Viscosity Difference 0.20 0.20 0.20 0.25 0.15 division Comparative Preparation
1-1 Comparative Preparation
1-2 Comparative Preparation
1-3 Comparative Preparation
1-4 Comparative Preparation
1-5 High viscosity PET resin Intrinsic viscosity 0.65 0.78 0.78 0.96 0.72 Parts by weight 100 100 100 100 100 Low Viscosity PET Resin Intrinsic viscosity - 0.58 0.58 0.58 0.60 Parts by weight - 38 15 28 28 Intrinsic Viscosity Difference - 0.20 0.20 0.28 0.12

Preparation Example 2-1 to Preparation Example 2-2 and Comparative Preparation Example 1-1

Prepare a polyester chip containing the same high-viscosity PET resin low viscosity PET resin as Preparation Example 1-1, in addition to the high viscosity and low viscosity PET resin polyester table further comprises a polycyclohexylene dimethylene terephthalate (PCT) as shown in Table 2 below Were prepared, and Preparation Example 2-1 to Preparation Example 2-2 and Comparative Preparation Example 1-1 were carried out.

division Preparation Example 2-1 Preparation Example 2-2 Comparative Preparation Example 2-1 High viscosity PET resin Intrinsic viscosity 0.78 0.78 0.78 Parts by weight 100 100 100 Low Viscosity PET Resin Intrinsic viscosity 0.58 0.58 0.58 Parts by weight 28 28 28 PCT Parts by weight 9 5 15

Examples 1 to 9 and Comparative Examples 1 to 10

Polybromoepoxy (Mw = 70,000, bromine content of about 67.8% by weight) consisting of a polyester resin prepared in Preparation Examples and Comparative Preparation Examples, a polymer of a brominated bisphenol A diglycidyl ether and a brominated bisphenol A as a flame retardant, a heat stabilizer (Product name: Iganox 1010) and a process stabilizer (brand name: Stutut 065) was prepared in a resin composition for producing a wig yarn (mixed resin) in a blending ratio as shown in Table 4 below, to prepare a wig yarn using this, The type of polyester resin used is shown in Table 3.

The polyester chips were dried at 140 ° C. for 8 hours using a vacuum dryer, and the flame retardant was dried at 90 ° C. for 5 hours and then ground. At this time, the crushed particle size was 0.1 ~ 0.8mm. Measured according to the mixing ratio shown in Table 1, put into a tumbler type agitator, stirred for 30 minutes at 30rpm, and then a single screw extruder having a diameter of 50mm with a 160-hole spinneret having an octagonal, hexagonal, pentagonal, and peanut-shaped cross section. Undrawn yarn was prepared so that the monofilament fineness was 180 denier by spinning at a speed of 150 m / min. At this time, the cylinder temperature of the extruder was set to 270 ~ 330 ℃, spinneret temperature was set to 270 ℃. The extruder screw used was a compression ratio of 5, and the filter mesh attached to the extruder front end was mounted in front of the breaker plate by overlapping three 300 mesh sheets. And melt spinning draft ratio was set to 10 and wound up. After the non-drawn yarn was heat-stretched at 80 ° C. at a draw ratio of 3.6 times, tension heat treatment at 120˜200 ° C. to prepare 50 denier wig yarns.

And, in the case of Comparative Examples 9 to 12, the mixing ratio and the like conditions were carried out in the same manner as in Example 1, the screw compression ratio and the draft ratio was performed as shown in Table 4, unlike the other examples and comparative examples.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Polyester
Suzy Preparation
1-1 Preparation
1-2 Preparation
1-3 Preparation
1-4 Preparation
1-5 Preparation
2-1 Preparation
2-2 division Example 8 Example 9 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Polyester
Suzy Preparation
1-1 compare
Preparation
1-1 compare
Preparation
1-2 compare
Preparation
1-3 compare
Preparation
1-4 compare
Preparation
1-5 division Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Comparative Example 11 Comparative Example 12 Polyester
Suzy compare
Preparation
2-1 Preparation
1-1

division Flame retardant Heat stabilizer Process Stabilizer Polyester
Suzy screw
Compression Ratio Draft Bee Example 1
Example 7 18 wt% 1500 ppm 1000 ppm Remaining balance
100 wt% 6.0 10 Example 8 20 wt% Example 9 15 wt% Comparative Example 1
Comparative Example 6 18 wt% Comparative Example 7 13 wt% Comparative Example 8 23 wt% Comparative Example 9 18 wt% 4.0 10 Comparative Example 10 18 wt% 7.0 10 Comparative Example 11 18 wt% 6.0 4 Comparative Example 12 18 wt% 6.0 42

In Examples 1 to 9 and Comparative Examples 1 to 8, problems in the manufacturing process did not occur. On the contrary, in Comparative Example 9 in which the screw compression ratio was 4.0 less than 5.0, the kneading state was poor. In Comparative Example 10 in which the screw compression ratio was 7.0 exceeding 6.8, the discharge amount decreased and the productivity decreased. .

Although the number of trimming was measured for 48 hours, in Examples 1 to 9 and Comparative Examples 1 to 8, the number of trimming was 2 times / 48 hours or less, whereas in Comparative Example 11 having a draft ratio of less than 5, the number of trimming was The number of trimming increased more than 5 times / 48 hours, which is thought to be caused by control problems. In the case of Comparative Example 12 in which the draft ratio exceeded 40, the number of trimming was greatly increased to 8 times / 48 hours, and there was a problem that the fineness of the manufactured wig yarn was uneven.

Experimental Example: Measurement of Physical Properties of Wig Yarns

The strength, elongation, touch, curling properties and long-term heat resistance of Examples 1 to 9 and Comparative Examples 1 to 8 were measured by the following methods, and the results are shown in Table 5 below.

(1) strength and elongation

Using an automatic tensile tester (Textechno) was measured by applying a gripping distance of 50cm / min, 50cm. Strength and elongation are the loads (g / de) divided by the denier (deeni) divided by the force applied when the fibers are stretched until they are cut with a constant force (%). ) As the Shinto.

(2) touch

An artificial wig of 40,000 denier bundles (160 strands-50 deniers-5 strands), which was focused, was cut into 30 cm lengths, fixed to a clamp, and evaluated by rubbing with a thumb, index finger and middle finger dried at 60 ° C for 2 hours. Evaluation criteria are as follows.

(◎: Very smooth. ○: Some smoothness. △: Lack of smoothness. ㅧ: Very low smoothness.)

(3) curl formation, curl retention

Curling formability: 40,000 denier bundles of bundled wig yarn (160 strands 50 denier ㅧ 5 strands) were cut into 30 cm lengths, fixed in a clamp, and wound 5 times in an electric curler heated to 200 ° C, and then maintained for 5 seconds. After removing the curling iron, the curl state immediately after curling was evaluated. This was based on the curling length of the wig yarn prepared with 100 parts by weight of natural hair.

(◎: When the curling length of the artificial wig made of natural hair is the same, ○: 1 to 2 cm stretched from the standard, △: 3 to 4 cm stretched from the standard, ㅧ: 5 cm or more stretched from the standard)

And, the curl retaining property after washing and drying 10 times the wig yarn used in the curl formation evaluation in cold water, and evaluated the state of maintaining the formed curl.

(◎: excellent curl retention, ○: excellent curl retention, △: normal, ㅧ: curl loose)

(4) Long-term heat resistance (minutes): The oxidation start time was measured at 200 ° C. using an oxygen induced time (OIT).

division Strength (g / de) Elongation (%) touch Curl formation Curling Long term heat resistance (min) Example 1 2.83 69.3 ◎ ◎ ◎ 92 Example 2 3.08 66.4 ◎ ◎ ◎ 93 Example 3 2.76 71.7 ◎ ○ ○ 92 Example 4 2.88 72.5 ◎ ○ ○ 95 Example 5 2.71 65.3 ◎ ◎ ○ 91 Example 6 3.12 72.1 ◎ ◎ ◎ 98 Example 7 3.07 71.5 ◎ ◎ ◎ 95 Example 8 2.80 68.5 ◎ ○ ○ 113 Example 9 2.98 70.2 ◎ ◎ ◎ 88 Comparative Example 1 2.05 61.8 ◎ ○ △ 102 Comparative Example 2 3.12 62.7 ◎ ◎ ◎ 90 Comparative Example 3 2.64 72.4 ◎ ○ △ 92 Comparative Example 4 2.75 72.9 ◎ △ △ 95 Comparative Example 5 2.33 62.4 ◎ ◎ △ 88 Comparative Example 6 3.13 71.7 ○ △ ○ 100 Comparative Example 7 3.05 70.6 ◎ ◎ ◎ 75 Comparative Example 8 2.48 64.0 ○ △ △ 120

In the case of Examples 1 to 9, the overall mechanical strength of 2.70g / d or more, elongation 65% or more, and excellent in touch, curl formation and curl retention as well as excellent long-term heat resistance. there was.

In particular, in Example 6 and Example 7, which used three types of high-viscosity PET, low-viscosity PET, and PCT as polyester resins, compared with Example 1, which used two kinds of high-viscosity PET and two low-viscosity PETs, they were relatively better. It could be confirmed that it had strength and elongation.

On the contrary, in Comparative Example 1 using only PET resin having an intrinsic viscosity of 0.65 as the polyester resin, the strength and the elongation were not as good as in the other examples and the comparative examples, and the curl retainability was inferior.

In Comparative Example 2 in which the low-viscosity PET resin was used in excess of 35 parts by weight, the elongation was sharply decreased when compared with Example 2, and in Comparative Example 3 in which the low-viscosity PET resin was used in less than 20 parts by weight. Case, when compared with Example 3, the strength was slightly lower, the curl retention was not good.

In addition, in the case of Comparative Example 4 using a polyester resin having an intrinsic viscosity difference of more than 0.25 PET resin, the elongation is excellent compared to Example 4, but it is confirmed that there is a problem that curl formation and curl retention is rather reduced In the case of Comparative Example 5 using a polyester resin having an intrinsic viscosity difference of less than 0.15 of PET resin, the strength and elongation were greatly reduced, and the curl retention was poor compared to Examples 1 and 5.

And, in the case of Comparative Example 6 in which the PCT is used in excess of 10 parts by weight, compared with Examples 6 to 7, there was no effect of improving mechanical properties, but rather curl formation was poor.

In the case of Comparative Example 7, the flame retardant content is less than 15% by weight, there was a problem that the long-term heat resistance is sharply reduced compared to Example 9, and in the case of Comparative Example 8 using a flame retardant content of more than 20% by weight, compared with Example 8 Long-term heat resistance was excellent, but mechanical properties and curl formation were greatly reduced.

Through the above examples and experimental examples, it was confirmed that the polyester wig yarn of the present invention not only excellent mechanical properties, but also excellent curl formation and curl retention, and also excellent long-term heat resistance.

Claims (9)

delete delete Preparing a mixed resin comprising a flame retardant, a heat stabilizer, a process stabilizer, and a polyester resin;
The mixed resin is injected into a melt extruder in which a compression ratio of the screw is in the range of 5.0 to 6.5 and a plurality of metal mesh filters of 300 to 400 mesh are inserted into the screw tip, and then melt-spun to produce filaments. ; And
Performing a process comprising; three steps of drafting the filament spun;
The polyester resin includes a high viscosity PET (polyethylene terephthalate) resin having an intrinsic viscosity (IV) of 0.75 to 0.90 and a low viscosity PET having an intrinsic viscosity of 0.50 to 0.60,
The mixed resin is 15 to 20% by weight of flame retardant, heat stabilizer 500 to 5,000ppm, process stabilizer 500 to 5,000ppm and the balance of the polyester resin,
The polyester resin is a method for producing a polyester wig yarn excellent in mechanical properties and curling properties, characterized in that containing 20 to 35 parts by weight of the low viscosity PET with respect to 100 parts by weight of the high viscosity PET resin.
The method of claim 3, wherein the polyester resin further comprises a polycyclohexylene dimethylene terephthalate (PCT). 5. The method of claim 4, wherein the polyester resin comprises PCT in an amount of 5 to 10 parts by weight based on 100 parts by weight of a high viscosity PET resin. 6. The method of claim 3, wherein the flame retardant is a bromine content of 50 to 70% by weight, the polymer bromine-based flame retardant having excellent mechanical properties and curling properties, characterized in that the weight average molecular weight of 10,000 to 120,000 Way. 15 to 20% by weight of flame retardant, 500 to 5,000ppm thermal stabilizer, 500 to 5,000ppm process stabilizer and the remaining amount of the polyester resin, the polyester resin 100 parts by weight of high viscosity PET resin having an intrinsic viscosity (IV) of 0.75 ~ 0.90 A resin composition for producing a polyester wig yarn having excellent mechanical properties and curling properties, comprising 20 to 35 parts by weight of a low viscosity PET having an intrinsic viscosity (IV) of 0.50 to 0.60. It comprises the resin composition of claim 7,
A polyester wig yarn having excellent mechanical properties and curling properties, when the fineness is 50 denier, the strength is 2.70 to 3.50 g / d and the elongation is 65 to 72%. A polyester wig yarn excellent in mechanical properties and curling properties, which is prepared by the method of any one of claims 3 to 6.