KR20120132055A - Flame retardant polyester filaments yarn having excellent light tight and coating effect and Process of Preparing the Same - Google Patents

Abstract

PURPOSE: A method of manufacturing low melting flame retardant polyester filaments with an excellent light blocking is provided to manufacture fabrics which show excellent light blocking without using separate dope dyed yarns due to light blocking compounds contained in the yarn itself and maintain the quality of the whole fabric since enough heat welding and hardening are caused at a low thermal treating temperature which prevents shrinkage strain or gloss change due to the heat. CONSTITUTION: A core-sheath type polyester filament includes a core polymer(A) containing a high melting polyester resin(a1) and a light blocking compound(a2), and a sheath polymer(B) containing a low melting copolymer polyester resin(b1) and a phosphorous flame retardant(b2). The polyester filament contains the core polymer(A) of 30-80 wt% and the sheath polymer(B) of 20-70 wt%. The high melting polyester resin(a1) is polyethylene terephthalate, polybutylene terephthalate or polytrimethylene terephthalate. The intrinsic viscosity of the high melting polyester resin(a1) is 0.6 or greater. The light blocking compound(a2) is carbon black or a coloring agent. The content of the light blocking compound(a2) is 0.4-2.0 wt% to the weight of the core polymer(A). The low melting copolymer polyester resin(b1) is manufactured by condensation polymerization of a dicarboxylic acid component(b11) which contains 70-80 mol% of terephthalic acid or dimethyl terephthalate and 20-30 mol% of adipic acid or dimethyl adipate, and diol component(b12) which contains 50-70 mol% of ethylene glycol and 30-50 wt% of 1,4-butandiol.

Description

Flame retardant sheath type polyester fiber excellent in light-shielding property and surface hardening property, and its manufacturing method. {Flame retardant polyester filaments yarn having excellent light tight and coating effect and Process of Preparing the Same}

The present invention relates to a polyester fiber and a method for producing the same. More specifically, it is a polyester yarn manufactured by complex spinning a core polymer including a light-shielding compound and a super polymer including a flame-retardant compound, and has excellent light-shielding property and flame retardancy, and is suitable for fabrics prepared using the yarn. The present invention relates to a polyester fiber and a method for producing the same, which exhibits fiber surface hardenability.

Important requirements for interior textile products, such as blinds and screens, are the stiffness, flame retardancy, and shading properties of recent demands.

In general, in order to express the hardened texture of the fabric, an organic solvent containing an adhesive component, an aqueous solution of formaldehyde, or a hard resin (phenol resin, melanin resin, urea resin) are used. However, when coating and processing organic solvent on the fabric, it is not easy to penetrate evenly to the inside of the fabric, so it is easy to cause a difference in adhesiveness and hardening texture, and the material used often contains highly volatile carcinogens. Can be.

In Japanese Patent Application Laid-Open No. 4-018108, a method of developing an eco-friendly screen product without treating an organic solvent including an adhesive is made of a deep core composed of polyethylene terephthalate, and a deep core composed of a low melting point polyester. To propose a screen manufacturing technology for constructing a knitted fabric. That is, when weaving fabrics using the yarn manufactured by the above technique, the surface hardenability by fusion can be obtained by treating the fabric at a temperature condition higher than the initial melting point of the polymer and lower than the melting point of the core.

However, although surface hardenability can be obtained by the above method, light shielding properties cannot be improved. In order to increase the light shielding property, it is necessary to use a combination of a deep shielding yarn such as an original yarn in addition to the above-described deep sheath-type composite yarn, and as a result, the amount (mixing rate) of the deep-ear composite yarn is reduced, so that the thermal energy conductivity required for low melting point fusion is increased. Will fall. As a result, by applying a higher heat treatment to the fabric to induce fusion there is a problem that the probability of unwanted problems such as shrinkage deformation and surface gloss change of the fabric increases.

It is important for interior decoration products including blinds and screens to be flame retardant to meet the national building fire fighting standards. To this end, recently, a method of attaching a flame retardant caused by posterior salt to a fiber surface has been widely performed. However, this method has been pointed out the problem of non-uniform flame retardancy and discoloration and texture change of the fabric.

On the other hand, in order to improve the problem of the rear salt, US Patent No. 5,990,213 proposed a flame retardant polyester resin composition consisting of a polyester resin and a brominated flame retardant component containing a polyalkylene oxide, Republic of Korea Patent Publication No. 2006-0127882 Has proposed a permanent flame retardant fiber made of polybrominated anionic styrene polymers. However, the brominated flame retardant component has a disadvantage of causing environmental problems due to the generation of carcinogens such as dioxins during incineration.

On the other hand, Korean Patent Laid-Open Publication No. 1999-006227, 2008-0014237, etc. have proposed for the production of polyester fibers expressing a permanent flame retardant performance by copolymerizing a phosphorus flame retardant. These technologies are recognized for their environmental characteristics and human-friendly flame retardant fibers by using environmentally friendly non-halogen phosphorus-based flame retardants, but they do not deal with shading or other surface hardening properties other than flame retardancy.

Dope dyed type yarns are used to increase the light-blocking effect of blinds and screen textile products, and methods for manufacturing polyester yarns are proposed in Japanese Patent Application Laid-Open Nos. Hei 3-137227 and Hei 10-77523. have. However, the above patent does not deal with flame retardancy or surface hardenability as a manufacturing technology given only a light shielding function.

On the other hand, Korean Patent Laid-Open No. 2006-0078795 proposes a manufacturing technique to have a carbon black in the polyester polymer containing a phosphorus-based flame retardant 500 to 5000ppm to have a primary adhesion and flame retardance to the polyester fiber. However, by this method, it is possible to develop a flame retardant product having a high light shielding property, but there is a problem of coating and treating with an organic solvent to which an adhesive is added in order to use in blinds and screen products.

As described above, the technology that satisfies the surface hardenability, the light shielding property, and the flame retardancy at the same time has not been proposed yet. Therefore, in order to solve the problems described above, the present inventors have shown high environmentally-friendly surface hardenability required for blinds and screen applications. There is a need to develop polyester fibers having light shielding properties and excellent flame retardancy.

An object of the present invention is to provide a polyester fiber which is excellent in light shielding properties, flame retardancy and surface hardenability at the same time.

Another object of the present invention is to provide a method for producing a polyester fiber having excellent light shielding properties, flame retardancy and surface hardenability at the same time.

The above and other objects of the present invention can be achieved by the present invention described in detail below.

In order to solve the above technical problem, according to one embodiment of the present invention, the present invention is a core polymer (A) and a low melting point copolymer polyester comprising a high melting point polyester resin (a1) and a light-shielding compound (a2) Provided is a core sheath polyester fiber comprising a first polymer (B) comprising a resin (b1) and a phosphorus flame retardant (b2).

According to another embodiment of the present invention, the light-shielding compound (a2) is carbon black or a colorant, and the content of the light-shielding compound (a2) is 0.4 to 2.0% by weight based on the weight of the core polymer (A). .

According to another embodiment of the present invention, the melting point of the low-melting co-polyester resin (b1) is characterized in that 30 to 120 ℃ lower than the melting point of the high-melting point polyester-based resin (a1).

According to another embodiment of the present invention, the melting point of the low-melting co-polyester resin (b1) is characterized in that the 100 to 190 ℃.

According to another embodiment of the present invention, the low melting point copolymerized polyester resin (b1) is characterized in that the crystallinity is maintained below the melting point.

According to another embodiment of the present invention, the phosphorus content of the phosphorus compound (b2) is characterized in that 1,000 to 13,000ppm relative to the weight of the elementary polymer (B).

In order to solve the other technical problem of the present invention, according to one embodiment of the present invention, a deep polymer (A) and a low melting point copolymer polyester comprising a high melting point polyester resin (a1) and a light-shielding compound (a2) Preparing a spinning resin comprising a base polymer (B) comprising a resin (b1) and a phosphorus flame retardant (b2); And spinning the spinning resin through a composite spinning nozzle; wherein the spinning temperature is set at 220 to 260 ° C. and the core polymer is at 265 to 295 ° C. for the initial polymer of the spinning step. It provides a polyester fiber manufacturing method, characterized in that 2,500 to 3,300 m / min.

Hereinafter, the present invention will be described in detail.

The fabric containing the yarn produced by the present invention exhibits surface hardenability during the heat treatment process, and exhibits excellent light shielding properties without the use of a separate original yarn by the light-shielding compound possessed by the yarn itself, and sufficient heat even at a low heat treatment temperature. By fusion and hardening, shrinkage deformation and gloss change due to heat can be prevented to maintain the quality of the entire fabric. In addition, if a flammable gas is generated after melting the first part that comes into contact with heat in case of fire, the copolymerization or mixing of the second part has an effect of preventing fire spread by taring the fiber surface to block air. .

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

Polyester fiber

The polyester fiber of the present invention is characterized by being manufactured by complex spinning of the core polymer (A) and the core polymer (B) as a core sheath polyester fiber.

The core sheath composite spun polyester fiber of the present invention is preferably prepared by complex spinning of 30 to 80 wt% of the core component and 20 to 70 wt% of the supercomponent, and the structure of the fiber used for the spinning of the core plant composite material is Center, eccentric and islands are all possible.

Deep Polymer (A)

The core polymer (A) is composed of a high melting point polyester resin (a1) and a light shielding compound (a2).

The high melting point polyester resin (a1) is preferably polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate.

In addition, the high-melting point polyester-based resin should use an extreme viscosity of 0.6 or more, preferably 0.64 or more to prevent breakage during spinning and excellent physical properties including yarn strength. In addition, it is preferable that the resin has a crystal melting peak of 240 ° C. to 260 ° C. according to differential thermal analysis, which is different from the melting point of the base polymer (B) to prevent deformation of the core polymer (A) during heat treatment, and to reduce the strength. This is because it is intended to prevent.

The light-shielding compound (a2) is preferably carbon black or a colorant, and the content thereof is preferably 0.4 to 2.0% by weight based on the weight of the core polymer (A). If the content of the light-shielding compound (a2) is less than 0.4% by weight, the light-shielding property of the polyester fiber is insufficient. In addition, if the amount exceeds 2.0% by weight, the process defects generated during radiation increase, and the light blocking property does not show a significant difference from the 2.0% by weight level.

Generally, in order to obtain high light-shielding effect, the common dope dyed fiber with carbon or colorant is mixed and used together with low melting polyester fiber, which increases the weight and thickness of the fabric, resulting in poor adhesive performance during heat treatment. The problem can be solved by using the fiber devised in the present invention. That is, by simultaneously improving the excellent light-shielding property, surface hardenability and flame retardancy, it is possible not only to develop thickness and various designs of woven and knitted fabrics suitable for each use, but also to exhibit excellent surface hardenability at a relatively low heat treatment temperature (general) It can save energy and do not need excessive heat treatment, making it possible to develop high quality products with high quality gloss and texture of fabric and less design and shrinkage deformation.

As a method of adding the light-shielding compound (a2), a polyester-based master batch chip containing a high concentration of carbon black or a colorant may be prepared or added, or may be added in the polymerization step of the high melting point polyester-based resin (a1).

It is preferable that no copolyester is used for the core polymer. The reason is that it is difficult to completely prevent agglomeration of the colorant due to the mixing and spinning of an excess of colorant, and when the agglomeration occurs partially, the main chain of the copolymerized polymer is weakened, and the probability of the yarn discharged from the nozzle is increased. Because there is. In order to solve the above problems, it is preferable to place the flame retardant copolymer in the core portion without using a copolymer.

Beginner Polymer (B)

The elementary polymer (B) is composed of a low-melting co-polyester resin (b1) and a phosphorus flame retardant (b2).

The low-melting copolymerized polyester resin (b1) is prepared by condensation polymerization of a dicarboxylic acid component (b11) and a diol component (b12), and the dicarboxylic acid component (b11) is 70 to 80 moles of terephthalic acid or dimethyl terephthalate. % And 20 to 30 mol% of adipic acid or dimethyl adipate, and the diol component (b12) may include 50 to 70 mol% of ethylene glycol and 30 to 50 weight% of 1,4-butanediol.

In addition, the low-melting co-polyester resin (b1) preferably has a uniform melting point, the crystallinity is maintained below the melting point. The reason for copolymerizing the 1,4-butanediol is that 1,4-butanediol has a high crystallinity, so that crystallinity is maintained even during copolymerization, and it can be thermally bonded even at a high temperature of only 5 ° C. at the melting point and determined at a temperature below that. Because of the strong sex, there is little variation. As a result, the melting and adhesion phenomena are balanced in the proper temperature range, enabling detailed process control and quality control.

It is preferable that melting | fusing point of the said low melting-point copolymerized polyester resin (b1) is 100-190 degreeC, and it is 30-120 degreeC lower than melting | fusing point of the said high melting point polyester-type resin (a1). If the melting point is less than 100 ℃ the physical properties of the yarn is vulnerable, the heat setting temperature in the roller and stretching machine is forced to be set low, resulting in a high shrinkage of the yarn. On the other hand, when the temperature is 190 ° C. or higher, the difference in melting point with the core is not great, and thus heat treatment is required at a high temperature. In this case, yarn properties may be changed, and shrinkage deformation and gloss change of the fabric may occur.

The reason why the phosphorus-based flame retardant (b2) is included in the elementary polymer is that the outer portion of the yarn outer layer having a low melting point is first melted and decomposed due to external heat during the fire, so that a flammable gas is generated. This is to prevent contact with air and to prevent ignition. In addition, a halogen-based phosphorus-based flame retardant is used to solve the problems occurring when the halogen-based flame retardant is used.

The phosphorus content of the phosphorus flame retardant or polyphosphoric acid is preferably 1,000 to 13,000 ppm relative to the weight of the elementary polymer (B). If the phosphorus content is less than 1,000 ppm, the flame retardancy is insufficient, and if the phosphorus content is more than 13,000 ppm, the physical properties of the copolymer may be easily embrittled by the heat received in a subsequent process.

By using the copolyester resin imparted flame retardancy in the initial portion, it is possible to prevent the physical property deterioration affecting the properties of the composite spun yarn and to establish good flame retardancy and spinning fairness at the same time.

Due to these characteristics, when used as a home interior, living, and industrial textile products, it is possible to solve the insufficient flame retardant performance, which is a problem when using a deep-sealing yarn using a low-melting polymer previously developed.

Method for producing polyester fiber

The present invention comprises preparing a spinning polymer resin including a core polymer (A) and a core polymer (B) and complex spinning a core polymer and a core polymer.

Spinning Polymer Resin Preparation Steps:

Core polymer (A) is prepared by adding a polyester-based masterbatch chip containing a high concentration of light-shielding compound (a2) to a high melting point polyester-based resin (a1) or in the polymerization step of the polyester-based resin (a1) Light-shielding compounds can be added.

The base polymer (B) may be prepared by copolymerizing or mixing the phosphorus-based flame retardant (b2) into a low melting copolymer copolymer resin (b1).

The high melting point polyester-based resin (a1) is preferably polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, and its intrinsic viscosity is preferably at least 0.6, more preferably at least 0.64. . Moreover, it is preferable that the crystal melting peak by differential thermal analysis is resin whose 240 degreeC-260 degreeC.

The light-shielding compound (a2) is preferably carbon black or a colorant, and the content thereof is preferably 0.4 to 2.0% by weight based on the weight of the core polymer (A).

The primary polymer (B) may be prepared by copolymerizing or adding a phosphorus flame retardant (b2) to a low melting copolymer copolymer (b1).

The low-melting copolymerized polyester resin (b1) is prepared by condensation polymerization of a dicarboxylic acid component (b11) and a diol component (b12), and the dicarboxylic acid component (b11) is 70 to 80 moles of terephthalic acid or dimethyl terephthalate. %, Adipic acid or dimethyl adipate 20 to 30 mol%, the diol component (b12) is preferably composed of 50 to 70 mol% of ethylene glycol, 30 to 50% by weight of 1,4-butanediol.

In addition, the low-melting copolymerized polyester resin (b1) has a uniform melting point, it is preferable that the crystallinity is maintained below the melting point, the melting point of the low-melting copolymerized polyester resin (b1) is the high-melting point polyester-based resin It is preferable that it is 30-120 degreeC lower than the melting point of (a1), and its melting point is 100-190 degreeC.

The phosphorus content of the phosphorus compound (b2) is preferably 1,000 to 13,000 ppm relative to the weight of the elementary polymer (B).

Spinning stage:

30 to 80% by weight of core polymer (A) and 20 to 70% by weight of core polymer (B) are composite spun.

When the composite spinning with the ratio and the polymer component proposed in the present invention, the spinning temperature needs to be adjusted according to the melting point and viscosity of the core and core. Generally, it is preferable to set the low-melting-point polyester which is a supercomponent to 220-260 degreeC, and to set it to 265-295 degreeC in the case of a core component.

The spinning speed is preferably 2,500 to 3,300 meters / minute.

Stretch  Step or Combustible  step:

Polyester fiber of the present invention can be produced by spinning with a partially oriented yarn (POY: Partially Oriented Yarn) without being stretched in the second step, by using a drawing machine after spinning spinning or rollers (GODET) mounted on the spinning machine It can be produced by the drawn yarn using the speed difference between the ROLLER).

It can also be produced by twisted yarn through the twisting process.

The stretching conditions can set an appropriate stretching ratio according to the physical properties, and the stretching temperature needs to be set with caution so that the low-melting co-polyester resin (b1) of the elementary polymer (B) is not fused. If the melting point of the first polymer is not uniform and the fusion occurs over a wide temperature range, it is difficult to set the proper stretching temperature, which may cause difficulty in controlling yarn shrinkage and physical properties.

It is for this reason that the copolyester resin which crystallinity is maintained below melting | fusing point in this invention is used for a part.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiment according to the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

Example  One

The core component was a polyester resin having an ultimate viscosity of 0.64, so that the carbon black content was 1.0% by weight relative to the core weight, and the initial component was a copolyester polyester resin having a melting point of 165 ° C and a phosphorus content of 5,000 ppm. . Thereafter, the spinning speed was discharged from the nozzle at 1,500 meters per minute, and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarns. The weight ratio of the core and supercomponents was 75:25. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Example  2

The core component was a polyester resin having an intrinsic viscosity of 0.64, containing 1.5% by weight of carbon black to the core weight, and the copolyester-based resin having a melting point similar to that of Example 1 and having a phosphorus content of 4,000 ppm was used. . After that, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarns. At this time, the weight ratio of the core and supercomponents was 60:40. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Example  3

The core component was a polyester resin having an intrinsic viscosity of 0.64, and the carbon black content was 1.5 wt% based on the core weight. The initial component was a copolyester-based resin having a melting point similar to that of Example 1 and having a phosphorus content of 8,000 ppm. Thereafter, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarns. The weight ratio of the core and supercomponents was 68:32. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Example  4

The core component was a polyester resin having an intrinsic viscosity of 0.64, and the carbon black content was 1.0 wt% based on the core weight, and the copolyester-based resin having a melting point of 140 ° C. and a phosphorus content of 6,000 ppm was used as the initial component. After that, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarn. The weight ratio of the core component and the initial component was 50:50. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Comparative Example  One

The core component was made not to contain carbon black as a polyester resin having an intrinsic viscosity of 0.64. The copolyester-based resin having the same melting point as that of Example 1 and to which no flame retardant was added was used as the initial component. After that, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarn. The weight ratio of the core component and the initial component was 50:50. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Comparative Example  2

The core component was a polyester resin having an intrinsic viscosity of 0.64, and the carbon black content was 2.5 wt% based on the core weight. The initial component was a copolymer polyester resin having a melting point of 200 ° C. and a phosphorus content of 4,000 ppm. After that, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarn. The weight ratio of the core component and the initial component was 50:50. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

Comparative Example  3

The core component was a polyester resin having an intrinsic viscosity of 0.64, and the carbon black content was 1.5 wt% based on the core weight. The initial component was a copolymer polyester resin having a melting point of 200 ° C. and a phosphorus content of 9,000 ppm. After that, the spinning speed was discharged from the nozzle at 1,500 meters per minute and stretched 2.6 times in GODET ROLLER to finally produce 75 denier 36 filament yarns. At this time, the weight ratio of the core component and the initial component was 40:60. After weaving and dyeing using this yarn, heat treatment was performed for 40 seconds at a temperature of 185 ° C to observe the surface hardenability, the gloss and shrinkage of fabrics, the light shielding and flame retardancy, and the spinning process for 8 hours. .

How to measure property

(1) intrinsic viscosity (extreme viscosity)

Ortho-Chloro phenol is used as a solvent and melts at 110 ℃ for 2.0g / 25ml for 30 minutes, then incubated at 25 ℃ for 30 minutes to provide an automatic viscosity measuring device connected to a CANON viscometer. Analyze through.

(2) hard effects

Five sections were randomly taken from the heat-treated fabric and the cross-sectional group was observed, and the number of filaments remaining in the shape of the heart was not analyzed and the number of filaments remaining in the form of the heart was analyzed. [90% or more: Good (◎), 80 ~ 90%: Normal (○) Less than 80%: Short (△)]

(3) shading

Measurement was performed by using an illuminometer according to KS K 0819 test standard.

Since the light-shielding properties vary depending on the thickness of the fabric, the color of the dye, and the like, the samples of Examples and Comparative Examples were all woven with the same fabric composition density and thickness, and then dyed and measured with the same dye. The light source used JD 100V, 500W prescribed by KS C.

(4) completeness

Full package rate refers to the probability that the yarn is wound without breaking for a certain period of time, and was measured during the eight-hour spinning process.

(5) flame retardant

The French flame retardant test criteria NFP 92-503, 504 and 505, the world's most widely used flame retardant certification methods, were evaluated.

(6) shrinkage gloss strain

Relative sensory evaluation was performed by five experts on shrinkage deformation and gloss change of fabric pretreatment after changing heat treatment condition to form more than 90% of fusion.

division Example Comparative example One 2 3 4 One 2 3 Core: Beginner 75:25 60:40 68:32 50:50 50:50 50:50 40:60 Deep Melting Point 255 ℃ 255 ℃ 255 ℃ 255 ℃ 255 ℃ 255 ℃ 255 ℃ Super melting point 165 ° C 165 ° C 165 ° C 140 ° C 165 ° C 200 ℃ 200 ℃ Carbon
Black 1.0% 1.5% 1.5% 1.0% 0% 2.5% 1.5% Phosphorus content 5000 ppm 4000 ppm 8000 ppm 6000 ppm 0 ppm 4000 ppm 9000 ppm Shading 99.9% 99.9% 99.9% 99.9% 90.8% 99.9% 99.9% Hard effect
(at 185 ℃) ◎ ◎ ◎ ◎ ◎ X X Flammability Pass (M1) Pass (M1) Pass (M1) Pass (M1) Fail (M2) Pass (M1) Pass (M1) Loosening rate 95% 92% 94% 93% 95% 78% 84% Shrinkage and Glossy Strain ◎ ◎ ○? ◎ ○ ◎ △ △

As can be seen from the results of Table 1, it is confirmed that the polyester fibers of Examples 1 to 4 are excellent in light shielding properties and flame retardancy, and also excellent in hard effects, spinning process and shrinkage gloss strain.

However, Comparative Example 1 does not contain a light-shielding compound such as carbon black, so the light-shielding property is low, and the phosphorus-based flame retardant is not included, thereby confirming that there is no flame retardancy. In addition, in Comparative Example 2, the melting point of the first polymer was 200 ° C., the hard effect and the shrinkage gloss strain were lowered, and the content of carbon black exceeded 2.0% by weight, thereby reducing the roll volume. In Comparative Example 3, it is confirmed that the hard effect and the shrinkage gloss strain are lowered by using a super polymer having a melting point of 200 ° C.

Therefore, it can be seen that the present invention satisfies the excellent light shielding property, the surface hardenability and the good flame retardancy at the same time, and also the fairness during radiation. In addition, it can be seen that the effect of preventing the shrinkage and gloss deformation of the fabric by inducing a surface hard effect at an appropriate low heat treatment temperature.

That is, according to the present invention, it is possible to develop a product which exhibits excellent flame retardancy without using a separate flame retardant yarn without expressing a high light shielding property without using a separate original yarn for shading property, and does not require PCV coating. .

Claims (13)

Core polymer (A) containing a high melting point polyester-type resin (a1) and a light-shielding compound (a2); And
A deep sheath polyester fiber comprising a low polymer (B) containing a low-melting co-polyester resin (b1) and a phosphorus flame retardant (b2).
2. The polyester fiber according to claim 1, wherein the polyester fiber comprises from 30 to 80% by weight of core polymer (A) and from 20 to 70% by weight of core polymer (B).
The polyester fiber according to claim 1, wherein the high melting polyester resin (a1) is any one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate.
The polyester fiber according to claim 1, wherein the intrinsic viscosity of the high melting point polyester resin (a1) is 0.6 or more.
The polyester fiber according to claim 1, wherein the light blocking compound (a2) is carbon black or a coloring agent.
The polyester fiber according to claim 1, wherein the content of the light-shielding compound (a2) is 0.4 to 2.0% by weight based on the weight of the core polymer (A).
The dicarboxylic acid component (b11) according to claim 1, wherein the low-melting co-polyester resin (b1) comprises 70 to 80 mol% of terephthalic acid or dimethyl terephthalate and 20 to 30 mol% of adipic acid or dimethyl adipate. ; And diol component (b12) comprising 50 to 70 mol% of ethylene glycol and 30 to 50 wt% of 1,4-butanediol.
The polyester fiber according to claim 1, wherein the melting point of the low melting copolyester resin (b1) is 30 to 120 ° C lower than the melting point of the high melting point polyester resin (a1).
The polyester fiber according to claim 1, wherein the melting point of the low-melting co-polyester resin (b1) is 100 to 190 ° C.
The polyester fiber according to claim 1, wherein the low-melting co-polyester resin (b1) maintains crystallinity below the melting point.
The polyester fiber according to claim 1, wherein the phosphorus content of the phosphorus compound (b2) is 1,000 to 13,000 ppm based on the weight of the elementary polymer (B).
The polyester fiber according to claim 1, wherein the polyester fiber is any one selected from the group consisting of partially oriented yarns, drawn yarns or false twisted yarns.
A deep polymer (A) containing a high melting point polyester resin (a1) and a light-shielding compound (a2), and an ultralow polymer (B) containing a low melting copolymer resin (b1) and a phosphorus flame retardant (b2) Preparing a resin for spinning; And spinning the spinning resin through a composite spinning nozzle;
The spinning temperature for the initial polymer of the spinning step is set to 220 to 260 ℃, core polymer is set to 265 to 295 ℃, spinning speed is 2,500 to 3,300 m / min characterized in that the polyester fiber manufacturing method.