KR102429299B1 - High shrinkage polyester fiber, chip for high shrinkage polyester fiber, fabric comprising the same - Google Patents

Abstract

The present invention relates to high shrinkage fibers, and more particularly, high shrinkage properties and excellent dyeability for cationic dyes, while improving processability and shortening manufacturing time by improving thermal properties, high shrinkage fibers and high shrinkage fibers It relates to a masterbatch chip, and a fabric comprising the same.

Description

High shrinkage polyester fiber, chip for high shrinkage polyester fiber, and fabric comprising the same

The present invention relates to a high shrinkage polyester fiber, and more particularly, a high shrinkage polyester fiber having high high shrinkage characteristics and excellent dyeability for cationic dyes, while improving processability and shortening manufacturing time by improving thermal properties; It relates to a chip for high shrinkage polyester fiber, and a fabric comprising the same.

Composite yarn with a conventional side core structure uses the difference in elongation of two types of yarn to induce a difference in the degree of false twist in the same false twisting area. Let the chosa have a structure that surrounds the examination. Polyester undrawn yarn or partially oriented yarn with high elongation is used as the super yarn, and polyester filament yarn or highly shrinkable yarn with high fineness is used as the core yarn. Drapability and resilience are expressed by large fineness.

On the other hand, various manufacturing methods for highly shrinkable polyester yarn are known, and there is a method using an oligomer as an industrially used method. It has the disadvantage of low heat shrinkage stress.

As another method, undrawn yarn spun from a polymer having a normal intrinsic viscosity is drawn at a temperature below the glass transition temperature (Tg) at a magnification of 85% or less of the undrawn yarn, and heat-set at a temperature near or below 100 ° C. There is a method of manufacturing unstable with respect to heat through not fixing the internal crystal structure. However, although this method increases the heat shrinkage rate, it is insufficient to increase the heat shrinkage stress, and since it is unstable to heat, general physical properties are unstable and the dyeability is poor.

Recently, as a method of manufacturing highly shrinkable polyester fibers, methods of using modified polyester with monomers modified and controlled to increase shrinkage have been tried. In this case, as the monomer to be changed or added, adipic acid, sebacic acid, isophthalic acid and derivatives thereof are used as acid components, or diethylene glycol, 2,2-dimethyl-1,3-propanediol instead of ethylene glycol, which is a diol component However, 2-diethyl-1,3-propanediol is used.

However, when the polyester is modified with these monomers, the glass transition temperature and melting point are excessively lowered, so the drying temperature of the polyester chip, the spinning temperature of the fiber, and the temperature during processing such as drawing must be changed to low, and thus the process time is shortened. There are problems such as prolonged or radioactive degradation.

Accordingly, there is an urgent need to develop high-shrinkage fibers having improved processability and shortened manufacturing time, high-shrinkage characteristics, and excellent dyeability for cationic dyes by solving these problems and improving thermal properties.

Unexamined Patent Publication No. 1986-0007402

The present invention has been devised in view of the above points, and has excellent spinnability into fibers, exhibits excellent shrinkage and dyeing properties, and at the same time improves thermal properties, shortens drying time, improves manufacturing conditions, etc., and improves productivity, An object of the present invention is to provide a fabric embodied including a high shrinkage polyester fiber, a chip for a high shrinkage polyester fiber, and a high shrinkage polyester fiber with minimal change over time at room temperature and improved storage stability.

In order to solve the above problems, the present invention provides an esterified compound in which an acid component containing terephthalic acid and 3,5-dicarbomethoxybenzenesulfonate metal salt and a diol component containing ethylene glycol and isosorbide are reacted. and a condensed copolyester, wherein the copolyester provides a high shrinkage polyester fiber having a melting point.

According to an embodiment of the present invention, the copolyester may have a melting point of 210° C. or higher.

In addition, the copolyester may have a glass transition temperature of 78° C. or higher.

In addition, the 3,5-dicarbomethoxybenzenesulfonate metal salt may be included in an amount of 0.5 to 3.5 mol% based on the acid component, and the child carbide may be included in an amount of 5 to 15 mol% based on the diol component.

In addition, the copolyester may further contain 0.5 to 2% by weight of polyethylene glycol having a weight average molecular weight of 1000 to 6000 polycondensed with the esterified compound, based on the weight of the copolyester.

In addition, the diol component may further include 0.1 to 5 mol% of 2-methyl-1,3 propanediol based on the diol component.

In addition, the 3,5-dicarbomethoxybenzenesulfonate metal salt may be included in an amount of 1 to 3 mol% based on the acid component, and the child carbide may be included in an amount of 5 to 10 mol% based on the diol component.

In addition, the high shrinkage fiber may have a specific shrinkage ratio of 13% or more, and a strength of 3.0 g/de or more.

In addition, the copolyester may have an intrinsic viscosity (I.V) of 0.60 to 0.75 dL/g.

In addition, the present invention is a copolyester in which an esterified compound in which an acid component containing terephthalic acid and 3,5-dicarbomethoxybenzenesulfonate metal salt and a diol component containing ethylene glycol and child carbide are reacted are polycondensed Including, wherein the copolyester provides a chip for high shrinkage polyester fiber having a melting point.

In addition, the present invention provides a composite yarn comprising a core including a high shrinkage polyester fiber according to the present invention, and a sheathing yarn disposed to surround the core yarn.

In addition, the present invention provides a fabric comprising the highly shrinkable fiber or composite yarn according to the present invention.

According to the present invention, it is possible to reduce the processing cost while improving the processability when implemented into a predetermined article using the excellent spinning property to the fiber and exhibiting excellent shrinkage and dyeing properties. In addition, the change over time at room temperature is minimized, and storage stability can be improved. Furthermore, the manufacturing time can be shortened by remarkably reducing the drying time when manufacturing chips, and the selectable drying temperature range can be widened, thereby making manufacturing easier. In addition, the product implemented using this also minimizes the change over time even under storage conditions such as summer (eg, 40° C. or higher), and has excellent storage stability, so it is possible to prevent deformation of the initial shape of the article or deformation during use.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The highly shrinkable fiber according to the present invention is an esterified compound in which an acid component containing terephthalic acid, 3,5-dicarbomethoxybenzenesulfonate metal salt, and a diol component containing ethylene glycol and isosorbide are reacted by polycondensation It is implemented by including a copolyester.

First, describing the thermal properties of the copolyester, the copolyester has a level of crystallinity at which the melting point can exist, thereby expressing appropriate shrinkage properties, and has the advantage of being able to express deep color in dyeability through the remaining amorphous portion. , there is an advantage that side effects due to the decrease in fastness after dyeing can be reduced because it can express a high glass transition temperature. Preferably, the copolyester may have a melting point of 200°C or higher, more preferably 210 to 240°C, and more preferably 220 to 240°C. If the melting point is less than 200 ℃, there is a fear that the spinnability may decrease and the amount of thread trimming may increase. In addition, during the stretching process after spinning, it is melted at the stretching temperature and thermally fused to the stretching roller may occur. In addition, when the melting point is excessively high and approaches the melting point of conventional regular PET, it may be difficult to express a desired shrinkage characteristic.

In addition, the copolyester may have a glass transition temperature of 78°C or higher, preferably 80 to 90°C. If the glass transition temperature is less than 78 ℃, room temperature change over time may be induced, storage stability may be reduced, and post-processing may not be smooth because it is difficult to meet the temperature conditions during post-processing of the yarn. In addition, in terms of yarn quality, since the drawing process must be heat-treated at a low temperature, there may be a problem in which hairs are generated on the surface of the yarn. On the other hand, if the glass transition temperature of the copolyester exceeds 90 ℃, conversely, the melting point may be lower than an appropriate level, which may cause a decrease in drying operability, such as difficult to set the drying temperature high.

The copolyester is formed by the reaction of an acid component and a diol component. The acid component includes terephthalic acid and 3,5-dicarbomethoxybenzenesulfonate metal salt, and other aromatic polyvalent carboxylic acids having 6 to 14 carbon atoms. and/or may further include an aliphatic polyvalent carboxylic acid having 2 to 14 carbon atoms.

In this case, the aromatic polyhydric carboxylic acid having 6 to 14 carbon atoms may be used without limitation in the case of known ones used for preparing polyester, and may be isophthalic acid, for example. In addition, as the aliphatic polyhydric carboxylic acid having 2 to 14 carbon atoms, known ones used for the production of polyester may be used without limitation, and non-limiting examples thereof include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid. Acid, suberic acid, citric acid, pimeric acid, azelaic acid, sebacic acid, nonanoic acid, decanoic acid, dodecanoic acid and hexanodecanophosphoric acid may be at least one selected from the group consisting of.

On the other hand, as the acidic component, other acidic components that may be provided other than terephthalic acid and 3,5-dicarbomethoxybenzenesulfonate metal salt may reduce thermal properties such as the glass transition temperature of the copolyester, so it is not preferably included. Therefore, the acid component may be composed of terephthalic acid and 3,5-dicarbomethoxybenzenesulfonate metal salt.

The 3,5-dicarbomethoxybenzenesulfonate metal salt improves dyeability with cationic dyes to improve dyeing properties, and contains an ionic group, so it is an acidic component having properties to improve viscosity during polymerization. The 3,5-dicarbomethoxybenzenesulfonate metal salt is preferably 0.5 to 3.5 mol%, more preferably 1 to 3 mol%, even more preferably 1, based on the total number of moles of the acidic component in the acidic component. ~ 2.5 mol% may be included. If the 3,5-dicarbomethoxybenzenesulfonate metal salt is contained in an amount of less than 0.5 mol%, the dyeing property of the cationic dye may be significantly reduced, and it may be difficult to achieve sufficient shrinkage characteristics. In addition, if the 3,5-dicarbomethoxybenzenesulfonate metal salt exceeds 3.5 mol%, the polymerization condition selection for producing a copolyester having an intrinsic viscosity (I.V) of 0.60 or more due to a viscosity increase during the polymerization process is difficult. It may become difficult, so that it may not be easy to manufacture the copolyester. In addition, in order to solve the difficulty of the manufacturing process, an excessive amount of a linear polymer such as polyethylene glycol may be added to increase the polymerization degree, but at this time, due to the added polyethylene glycol, thermal properties may be lowered, that is, the glass transition temperature and the melting point may be lowered. , which may reduce thermal stability. In addition, if the 3,5-dicarbomethoxybenzenesulfonate metal salt exceeds 3.5 mol%, the melting point decreases and the crystallinity of the copolyester decreases, so spinning must be performed under low temperature conditions, and stretching It is inevitable to change the heat treatment temperature during the process, which may increase the restrictions on spinning and processing conditions. In addition, the viscosity may increase during the spinning process, resulting in an increase in the spinning pack pressure, which may decrease the spinnability. In addition, there is a fear that the spun fiber has a hard feel and the elongation is significantly reduced.

Next, the diol component includes ethylene glycol and child carbide. The child carbide is a monomer capable of imparting structural bulkiness to the copolyester, and the copolyester having it exhibits a steric hindrance effect to have a more flexible and loose structure, thereby improving the shrinkage rate, High color development characteristics can be expressed. In addition, it is possible to improve the storage stability by increasing the glass transition temperature while lowering the crystallinity of the copolyester, remarkably improve fairness such as drying conditions and post-processing conditions relaxation, shortening time, and prevent change with time due to heat. The child carbide may be included in an amount of preferably 5 to 15 mol%, more preferably 5 to 10 mol%, even more preferably 5 to 8 mol%, based on the total number of moles of the diol component among the diol components. . If the child carbide is included in less than 5 mol%, the shrinkage property of the fiber may be reduced, and there is a risk that the dyeability may be reduced. In addition, if child carbide is included in excess of 15 mol%, it may not be easy to increase the polymerization degree due to the low reactivity of child carbide, and there is a risk of cost increase due to the increase in the amount of monomer used. In addition, since the glass transition temperature is excessively increased, the permeation of the dye may be significantly reduced, and there is a concern that the dyeability may be reduced. In addition, as the glass transition temperature increases, the melting point decreases and the temperature of the processing conditions such as drying, spinning and stretching is lowered.

The diol component may further include other types of diol components in addition to the above-mentioned child carbide and ethylene glycol. Since the other type of diol component may be a known diol component used in the production of polyester, the present invention is not particularly limited thereto, but as a non-limiting example thereof, it may be an aliphatic diol component having 2 to 14 carbon atoms, , specifically 1,3-propanediol, 2-methyl-1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, propylene glycol, trimethyl glycol, tetramethylene glycol, penta It may be any one or more selected from the group consisting of methyl glycol, hexamethylene glycol, heptamethylene glycol, octamethylene glycol, nonamethylene glycol, decamethylene glycol, undecamethylene glycol, dodecamethylene glycol and tridecamethylene glycol.

However, in order to further improve the dyeing characteristics, a diol component having 4 to 6 carbon atoms having a side chain among the aliphatic diol components having 2 to 14 carbon atoms may be further included, and among these, 2-methyl-1,3-propanediol is preferable. can 2-Methyl-1,3-propanediol can express a synergistic effect on dyeability and shrinkage properties of fibers together with child carbide. In addition, although 2-methyl-1,3-propanediol improves dyeability, child carbide can secure the problem of lowering the glass transition temperature of the copolyester, thereby reducing thermal stability. When 2-methyl-1,3-propanediol is further included, it is preferably provided in an amount of 0.1 to 5 mol% based on the diol component, and more preferably in an amount of 1 to 3 mol%. If 2-methyl-1,3-propanediol is provided in an amount of less than 0.1 mol%, the improvement in dyeability and shrinkage properties may be insignificant. The crystallinity is greatly reduced, resulting in a large decrease in the melting point and the glass transition temperature, and there is a fear that the productivity may be reduced due to the low melting viscosity and the low melting point, such as a decrease in spinnability and an extension of the drying time.

On the other hand, in order to prevent a decrease in the glass transition temperature and loss of the melting point that may occur due to the added diol component, it is preferable not to further include the other type of diol component. In particular, diethylene glycol is not included in the diol component. it is better not to If diethylene glycol is included in the diol component, it may cause a rapid decrease in the glass transition temperature and thus may not achieve the desired level of thermal properties even in the presence of child carbide. At this time, the meaning that diethylene glycol is not included in the diol component means that diethylene glycol is not added as a raw material in the production of copolyester, and in the esterification reaction, polycondensation reaction of the acid component and the diol component It does not mean that it does not contain even naturally occurring diethylene glycol. On the other hand, according to an embodiment of the present invention, the content of naturally occurring diethylene glycol included in the high shrinkage fiber together with the copolyester may be less than 3% by weight based on the weight of the copolyester. If the content of naturally occurring diethylene glycol exceeds an appropriate level, the pack pressure increases when spinning into fibers, and there is a problem in that the spinnability may be significantly reduced by causing frequent yarn breakage.

In addition, the copolyester may further include polyethylene glycol polycondensed with the esterified compound, thereby reducing the tactile sensation and radioactivity of the yarn due to 3,5-dicarbomethoxybenzenesulfonate metal salt. It can be supplemented, and it is possible to express dyeability with cationic dyes, and it is possible to improve the problem of low fastness to temperature increase when dyeing with disperse dyes, a problem that occurs in general polyester. In this case, the polyethylene glycol may have a weight average molecular weight of 1000 to 6000, and may be included in an amount of 0.5 to 2.0% by weight, more preferably 1.0 to 1.5% by weight, based on the weight of the copolyester. If polyethylene glycol is included in less than 0.5% by weight, the expression of the intended effect through polyethylene glycol may be insignificant. After dyeing, there is a risk of a decrease in color fastness and an increase in cost.

In addition, the polyethylene glycol may use a weight average molecular weight of 1000 ~ 6000, if the weight average molecular weight is less than 1000, the expression of the intended effect through polyethylene glycol may be insignificant, if the weight average molecular weight exceeds 6000 In this case, the reactivity may be lowered and the degree of polymerization may be lowered, and thermal properties such as a lower glass transition temperature may be deteriorated, and there is a risk of an increase in cost.

The above-mentioned copolyester can be prepared by esterification reaction and polycondensation of an acid component and a diol component using known synthesis conditions in the field of polyester synthesis. In this case, the acid component and the diol component may be added to react in a molar ratio of 1: 1.1 to 2.0, but is not limited thereto.

A catalyst may be further included in the esterification reaction. The catalyst may be a catalyst typically used in the production of polyester, and as a non-limiting example thereof, it may be prepared under a metal acetate catalyst.

In addition, the esterification reaction may be preferably performed at 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 compound suitable for a polycondensation reaction cannot be formed due to a prolonged esterification reaction time or reduced reactivity.

In addition, 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. .

In this case, a catalyst may be further included in the polycondensation 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.

Examples of the antimony compound include antimony oxides such as antimony trioxide, antimony tetraoxide, and antimony pentoxide, antimony trisulfide, antimony trifluoride, antimony trichloride, and the like, antimony triacetate, antimony benzoate, antimontristearate, and the like. 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 500 ppm based on the total weight of the polymer obtained after polymerization.

The copolyester prepared through the above-described method may have an intrinsic viscosity of 0.60 to 0.75 dL/g, more preferably 0.65 to 0.70 dL. If the intrinsic viscosity is less than 0.60 ㎗/g, the spinnability may decrease, and there may be concerns that the cross-section of the fiber may not be smooth. There is a risk that it could be

The above-mentioned copolyester can be implemented as a high shrinkage polyester fiber by appropriately adopting a conventional polyester spinning apparatus and conditions. For example, the highly shrinkable polyester fiber may be spun at a spinning temperature of 270 to 290° C., and may be stretched 2.5 to 4.0 times after spinning. In addition, the fineness of the high shrinkage polyester fiber may be 50 to 150 denier. However, the conditions for spinning the high-shrinkage polyester fiber, the detailed configuration of the spinning device, and the cooling, stretching, etc. of the high-shrinkage polyester fiber after spinning are performed through known conditions, devices and processes in the art, or modified as appropriate. can be carried out, so the present invention is not particularly limited thereto.

On the other hand, the copolyester may be manufactured as a yarn by being put into a spinning device at the same time as synthesis, but may also be manufactured as a chip for polyester fibers. In this case, it is possible to implement a high shrinkage polyester fiber by putting a pre-manufactured chip into a spinning device. In this case, the manufacturing method of the chip and the specification of the chip may follow the manufacturing method and specification known in the art, and thus, a detailed description thereof will be omitted in the present invention.

The high shrinkage polyester fiber implemented through the above-described manufacturing method may have a specific shrinkage rate of 13% or more, a strength of 3.0 g/de or more, and more preferably a strength of 3.6 g/de or more.

In addition, the manufactured high shrinkage fiber may be used alone, but in order to give the yarn a function that the high shrinkage fiber does not have, it can be implemented as a composite yarn in which high shrinkage fibers are placed on the core and different types of fibers are placed on the sheath yarn. . For example, by arranging undrawn polyester yarn or partially drawn polyester yarn with high elongation as a super yarn, it gives a soft feel to the yarn and at the same time expresses drape and repellency through high shrinkage polyester fiber placed in the core yarn. can

In addition, the above-described high shrinkage polyester fiber or a composite yarn including the high shrinkage polyester fiber may be used as a yarn to be implemented as a fabric. In this case, the fabric may be a woven fabric, a knitted fabric or a non-woven fabric. In this case, the fabric may consist of only high shrinkage fibers or a composite yarn including the same, or may constitute a fabric with different types of yarns. For the method of manufacturing the woven, knitted, or nonwoven fabric, conventional apparatus and conditions in the art may be employed, and thus, detailed description thereof will be omitted in the present invention.

The present invention will be described in more detail through the following examples, but the following examples are not intended to limit the scope of the present invention, which should be construed to aid understanding of the present invention.

<Example 1>

Based on the acid component, 98.5 mol% of terephthalic acid (TPA) and 1.5 mol% of 3,5-dicarbomethoxybenzenesulfonate sodium salt (DMS) were added, and 5 mol% of isosorbide (ISB) based on the diol component , 92 mol% of ethylene glycol (EG), and 3 mol% of 2-methyl-1,3-propanediol (MPO) are added, and the acid component and the diol component are added in a ratio of 1:1.2 at 250° C. at 1.5 kg/cm 2 ·G The esterification reaction was carried out under pressure conditions. Thereafter, the ester reactant is transferred to the polycondensation reactor, and 300 ppm of antimony trioxide, 220 ppm of a thermal stabilizer, and 1500 ppm of an antioxidant are added as a polycondensation catalyst. The sum reaction was performed, and the copolyester obtained through this was prepared as a chip having a width, length, and height of 2 mm × 4 mm × 3 mm, respectively, in a conventional manner.

Then, the prepared chip was put into an extruder and melted, transferred to a spinneret, spun at a spinning speed of 1000 mpm under 285 ° C., stretched 3.5 times, and high shrinkage polyester fibers as shown in Table 1 below, which are 75de/24 filaments. prepared.

<Examples 2 to 14>

Prepared in the same manner as in Example 1, but by changing the composition and composition ratio of the monomer for preparing the copolyester as shown in Table 1 or Table 2 below, the masterbatch chip shown in Table 1 or Table 2, and high shrinkage using the same Polyester fibers were prepared.

<Comparative Examples 1 to 2>

It was prepared in the same manner as in Example 1, but by changing the composition and composition ratio of the monomers for preparing the copolyester as shown in Table 1 below, polyester chips as shown in Table 1 and high shrinkage polyester fibers using the same were prepared. .

<Experimental example>

The following physical properties were evaluated for the polyester chips or high shrinkage polyester fibers prepared according to Examples and Comparative Examples, and the results are shown in Table 1 below.

1. Intrinsic Viscosity

For polyester chips, melted at 110°C, 2.0g/25ml concentration for 30 minutes using Ortho-Chloro Phenol as a solvent, and then incubated at 25°C for 30 minutes to automatically connect a CANON viscometer. Analyzed from a viscometer.

2. Glass transition temperature, softening point, melting point

The glass transition temperature, softening point, and melting point were measured using a differential calorimeter, and the analysis condition was a temperature increase rate of 20°C/min.

3. Dry operability

After confirming the temperature at which the surface crystallizes through pre-drying at a predetermined temperature on the table using a dehumidifying dryer and whether or not there is a bridge between the chips, the preliminary drying was carried out for 5 hours, the main drying was performed at the predetermined temperature for 5 hours, and the chip drying was completed. After moisture content measurement, when the moisture content was less than 100ppm, the dry operability was judged as good (○), and when it exceeded 100ppm, it was judged as bad (x).

4. Non-Shrinkage Rate

The specific shrinkage rate was calculated as a percentage by measuring the length of the yarn before and after the shrinkage of the yarn when the water was at 100°C.

5. Spinning operability

When spinning at a spinning temperature of 285℃ and spinning speed of 4,000MPM for 1 day, if the yarn breakage (trimming) is 0 times, it is very good (◎), if it is 1 to 2 times, it is excellent (○), if it is 3 to 4 times, it is normal ( △), 5 times or more was evaluated as insufficient (×).

6. Measurement of strength and elongation

The steel and elongation of the manufactured fiber were measured by applying a speed of 50 cm/m and a gripping distance of 50 cm using an automatic tensile tester (Textechno). Strength and elongation are defined as the value (g/de) obtained by dividing the applied load by the denier (g/de) when the fiber is stretched until it is cut by applying a constant force to the fiber. did.

7. Dyeability (deepness, K/S) evaluation

Dyeability (deep color, K/S) was dyed at 110°C for 3 minutes at 2% owf concentration by applying a conventional cationic dye, followed by reduction washing at 80°C to complete the dyeing. After measuring the reflectance (R: Reflectance) of the obtained dye using a spectrophotometer (Konica Minolta E-3000), the K/S value is obtained by substituting this into the formula K/S=(1-R) ² /2R. The value was evaluated for dyeability. It can be evaluated that the dyeability is excellent, so that the value of dyeability is large.

Item Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 copolyester TPA (mol%) 98.5 98.5 98.5 98.5 99.8 99.5 99 97 96 DMS (mol%) 1.5 1.5 1.5 1.5 0.2 0.5 One 3 4 ISB (mol%) 5 7 10 13 7 7 7 7 7 EG (mol%) 92 92 89 87 93 93 93 93 93 MPO (mol%) 3 One One 0 0 0 0 0 0 PEG (weight average molecular weight/wt%) 1000/1 1000/1 1000/1 1000/1 0 0 0 0 0 resin properties Tg (℃) 80 85 92 95 85.4 85.5 85.7 86.4 86.8 Tm (℃) 237 238 215 203 237.7 237 235.3 230.5 228 I.V. 0.68 0.68 0.69 0.68 0.65 0.65 0.64 0.62 0.57 dry Pre-drying temperature (℃) 130 130 110 80 130 130 130 110 110 Main drying temperature (℃) 150 150 130 130 150 150 150 130 130 Moisture content (ppm) 100
below 100
below 100
below 100
below 100
below 100
below 100
below 100
below 400 dry operability ○ ○ ○ ○ ○ ○ ○ ○ × high shrinkage fiber Radiation temperature (℃) 285 285 265 265 280 280 280 277 277 Strength (g/de) 3.95 3.85 3.3 3.25 4 3.85 3.83 3.74 poor radiation Elongation (%) 28 29 35 36 25 25 24 30 poor radiation Shrinkage (%) 15.20% 15.40% 18.10% 19.10% 11 14.2 15.0 16.1 poor radiation Dyeability (K/S) 11.7 10.8 14.1 14.8 4.2 7.8 10.3 14.3 poor radiation spinning operability ◎ ◎ ◎ △ ◎ ○ ○ △ ×

Item Example 10 Example 11 Example 12 Example 13 Example 14 Comparative Example 1 Comparative Example 2 copolyester TPA (mol%) 98.5 98.5 98.5 98.5 90 100 98.5 DMS (mol%) 1.5 1.5 1.5 1.5 10 0 1.5 ISB (mol%) One 3 14 20 10 0 0 EG (mol%) 99 97 86 80 90 90.5 92 MPO (mol%) 0 0 0 0 0 9.5 8 PEG (weight average molecular weight/wt%) 0 0 0 0 0 One One resin properties Tg (℃) 79.9 81.9 92.9 98.9 92 71 73 Tm (℃) 249.4 244.4 216.9 201.9 205.1 235 238 I.V. 0.63 0.63 0.63 0.6 0.6 0.68 0.68 dry Pre-drying temperature
(℃) 130 130 110 80 80 110 110 Main drying temperature (℃) 150 150 130 100 100 130 130 Moisture content (ppm) 100 or less 100 or less 100 or less 300 700 100 or less 100 or less dry operability ○ ○ ○ × × ○ ○ high contraction
sex fiber Radiation temperature (℃) 285 280 265 270 275 285 285 Strength (g/de) 3.83 3.57 3.05 poor radiation poor radiation 4.01 3.83 Elongation (%) 28.1 28.4 38 poor radiation poor radiation 27 28.1 Shrinkage (%) 8.5 9.0 20 poor radiation poor radiation 15 15 Dyeability (K/S) 8.9 9.0 12.3 poor radiation poor radiation 2 9 spinning operability ○ ○ △ × × ◎ ◎

As can be seen from Table 1 and Table 2,

It can be seen that the high shrinkage fiber according to the example has excellent dyeability and shrinkage properties at the same time as compared to the high shrinkage fiber according to the comparative example, and at the same time, the thermal properties are improved.

On the other hand, it can be seen that Examples 9, 13, and 14 of Examples have poor radiation compared to other Examples.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , changes, deletions, additions, etc. may easily suggest other embodiments, but this will also fall within the scope of the present invention.

Claims (12)

3,5-dicarbomethoxybenzenesulfonate metal salt 0.5 to 3.5 mol% and the remaining amount of terephthalic acid in the total mol% Contains copolyester in which an esterified compound reacted with an acidic component and a diol component are polycondensed and
The diol component contains ethylene glycol, 5 to 15 mol% of child carbide, 0.1 to 5 mol% of 2-methyl-1,3 propanediol, and the remaining amount of ethylene glycol among the total mol%,
The copolyester further comprises 0.5 to 2% by weight of polyethylene glycol having a weight average molecular weight of 1000 to 6000 polycondensed with the esterified compound, based on the weight of the copolyester,
The copolyester has a melting point,
A high shrinkage polyester fiber having a specific shrinkage ratio of 13% or more. According to claim 1,
The copolyester has a high shrinkage polyester fiber, characterized in that the glass transition temperature is 78 ℃ or more. According to claim 1,
The copolyester has a high shrinkage polyester fiber, characterized in that the melting point is 210 ℃ or more. delete delete delete According to claim 1,
The 3,5-dicarbomethoxybenzenesulfonate metal salt is contained in an amount of 1 to 3 mol% based on the acid component, and the isosorbide is included in an amount of 5 to 10 mol% based on the diol component. High shrinkage polyester fiber. According to claim 1,
High shrinkage polyester fiber, characterized in that the strength is 3.0 g/de or more. According to claim 1,
The copolyester has an intrinsic viscosity (IV) of 0.60 to 0.75 dl/g. 3,5-dicarbomethoxybenzenesulfonate metal salt 0.5 to 3.5 mol% and the remaining amount of terephthalic acid in the total mol% Contains copolyester in which an esterified compound reacted with an acidic component and a diol component are polycondensed and
The diol component contains ethylene glycol, 5 to 15 mol% of child carbide, 0.1 to 5 mol% of 2-methyl-1,3 propanediol, and the remaining amount of ethylene glycol among the total mol%,
The copolyester further comprises 0.5 to 2% by weight of polyethylene glycol having a weight average molecular weight of 1000 to 6000 polycondensed with the esterified compound, based on the weight of the copolyester,
The copolyester is a chip for high shrinkage polyester fiber having a melting point. A core comprising a high shrinkage polyester fiber according to any one of claims 1 to 3 and 7 and 9; and
Composite yarn including; chosa disposed to surround the examination. A fabric comprising the highly shrinkable polyester fiber according to claim 1 .