KR20120117428A - Fibers, yarns, threads and textile articles made of an alloy resin composition of polyamide and polyester - Google Patents

Abstract

PURPOSE: A method for fabricating a hybrid fiber containing polyamide and polyester is provided to improve compatibility with polyamide resin and thermoplastic polyester resin and to obtain the fiber with excellent strength and extension. CONSTITUTION: A method for fabricating a polyester synthetic fiber comprises: a step of melting and blending 4.99-45 wt% of thermoplastic polyamide resin, 54.99-95 wt% of thermoplastic polyester resin, and 0.01-10 wt% of epoxy resin at 250-300 Deg. C.; and a step of spinning and drawing the blend. The epoxy resin is DGEBA(diglycidyl ether of bisphenol A) type epoxy resin, DGEBF(diglycidyl ether of bisphenol F) type epoxy resin, hydrogenated bisphenol A type epoxy resin, bromized epoxy resin, cycloaliphatic epoxy resin, rubber-modified epoxy resin, aliphatic poly glycidyl type epoxy resin, or glycidyl amine type epoxy resin.

Description

FIBERS, YARNS, THREADS AND TEXTILE ARTICLES MADE OF AN ALLOY RESIN COMPOSITION OF POLYAMIDE AND POLYESTER}

The present invention relates to fibers, yarns, yarns and / or textile articles consisting of a composition comprising at least a polyamide resin, a polyester resin and an epoxy resin. Specifically, the alloy composition of the present invention (alloy resin composition) improves the compatibility of the polyamide resin and the thermoplastic polyester resin and exhibits good radioactivity even by the conventional thermoplastic melt melting method. The present invention also provides a method for producing the fiber.

Polyamide fiber is a synthetic fiber made from a polymer having an amide bond as a raw material, and an aliphatic polyamide fiber is nylon, and an aromatic polyamide fiber is aramid fiber. Polyamide fibers have excellent strength, heat resistance, insulation and chemical resistance.

Polyester fiber is a synthetic fiber made from a polymer having an ester bond as a raw material, and PET fiber mainly composed of polyethylene terephthalate is now common. Polyester fibers have a relatively high strength, low hygroscopicity and excellent chemical resistance and heat resistance, and particularly have a large elastic Young's modulus.

Research into new fiber materials combining all of the advantages of these polyesters and polyamides is underway. However, there are many studies on island-in-the-sea yarns in which the polyester and polyamide are melted separately and woven together at the point of spinning. However, the polyester resin and the polyamide resin are insufficient in compatibility with each other, and when the melt-blend is formed only by them, there is a problem of poor workability and lower physical properties. There is a lack of research on how to make fibers.

Thus, US Pat. No. 4,150,674 discloses a technique applied to fiber applications by using a trimer of lactam as a compatibilizer in polyamide resins and polyester resins. Japanese Patent Laid-Open No. 2005-15705 discloses forming an alloy pellet having a dispersion diameter of 1 to 50 nm of a dispersed polymer, but there is no description of using a compatibilizer.

Japanese Patent Laid-Open No. 2006-233375 is a compatibilizer for improving interfacial adhesion between polyester and polyamide, and has a compound having two or more active hydrogen reactive groups (glycidyl, carbodiimide, oxazoline group) in one molecule. Use

Despite these documents, there is still a need in the art for the development of compatibilizers to provide good compatibility in the formation of melt blends of polyamide resins and polyester resins.

The present inventors have found that compatibility is greatly improved when an epoxy resin is added during the melt blend formation of a polyamide resin and a polyester resin, and completed the present invention.

It is an object of the present invention to provide a fiber made of an alloy composition comprising a polyamide resin and a polyester resin having improved compatibility and exhibiting good spinning properties even by conventional thermoplastic melt melting. On the other hand, according to the prior art, the polyamide polyester alloy cannot be spun by conventional methods.

According to a preferred embodiment of the present invention for achieving the above object, a) 4.99 to 45% by weight thermoplastic polyamide resin, b) 54.99 to 95% by weight thermoplastic polyester resin, and c) 0.01 to 10% by weight epoxy resin Melting at 250 to 300 ° C. to form a blend; And spinning and stretching the blend to produce a synthetic fiber.

According to another suitable embodiment of the present invention, the epoxy resin is a DGEBA (diglycidyl ether of bisphenol A) type epoxy resin, DGEBF (diglycidyl ether of bisphenol F) type epoxy resin, hydrogenated hydrogenated bisphenol A (BPA) type epoxy resin, Brominated epoxy resins, cycloaliphatic epoxy resins, rubber-modified epoxy resins, aliphatic polyglycidyl type epoxy resins and glycidyl amine type epoxy resins, characterized in that at least one member.

According to another suitable embodiment of the present invention, the epoxy equivalent of the epoxy resin is characterized in that 2,100 to 6,000 g / eq.

According to another suitable embodiment of the invention, the composition comprises from 0.05 to 7% by weight of epoxy resin.

According to another suitable embodiment of the present invention, according to another suitable embodiment of the present invention, the polyamide resin is polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide- 12, terephthalic acid-based polyamide, isophthalic acid-based polyamide, polyaramid, and one or more selected from the group consisting of copolymers thereof.

According to another suitable embodiment of the present invention, the polyester resin is polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polybutylene (terephthalate / adipate), polybutylene (terephthalate) / Sebacate), polybutylene (terephthalate / decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate / isophthalate), polyethylene (terephthalate / adipate), polyethylene (terephthalate / One or more selected from the group consisting of 5-sodium sulfoisophthalate), polybutylene (terephthalate / 5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate and polycyclohexanedimethylene terephthalate It features.

According to another suitable embodiment of the present invention, a polyester synthetic fiber comprising a) 4.99 to 45% by weight of polyamide resin, b) 54.99 to 95% by weight of polyester resin, and c) 0.01 to 10% by weight of epoxy resin To provide.

Alloy resin compositions having improved compatibility according to the present invention can be obtained by using certain epoxy resins in polyamide resins and polyester resins, which are well known to be incompatible. The alloy resin composition having improved compatibility can be spun by the conventional process used for the thermosetting polymer and has excellent mechanical properties.

The present invention relates to synthetic fibers comprising a) 4.99 to 45% by weight of polyamide resin, b) 54.99 to 95% by weight of polyester resin, and c) 0.01 to 10% by weight of polyamide resin. Each resin used for the production of the synthetic fiber will be described below.

(a) polyamide resin

The polyamide resin used in the hybrid fiber of the present invention is obtained by ring-opening polymerization of a conventional thermoplastic polyamide resin, for example, a lactam such as ε-caprolactam and ω-dodecalactam. Polyamide-6; Polyamide polymers obtainable from amino acids such as aminocaproic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid; Ethylenediamine, tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4-trimethylhexamethylenediamine (2,2 , 4-trimethylhexamethylenediamine), 2,4,4-trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 5-methylnonahexamethylenediamine, methylxylenediamine, m- xylenediamine, paraxylene P - xylenediamine, 1,3-bisaminomethylcyclohexane, 1,4-bisaminomethylcyclohexane, 1-amino-3 -Aminomethyl-3,5,5-trimethylcyclohexane (1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane), bis (4-aminocyclohexane) methane {bis (4-aminocyclohexane) methane}, Bis (4-methyl-4-aminocyclohexyl) methane {bis (4-methyl-4 -aminocyclohexyl) methane}, 2,2-bis (4-aminocyclohexyl) propane {2,2-bis (4-aminocyclohexyl) propane}, bis (aminopropyl) piperazine {bis (aminopropyl) piperazine}, aminoethyl Aliphatic, cycloaliphatic or aromatic diamines such as piperidine (aminoethylpiperidine); Adipic acid, sebacic acid, azelaic acid, dodecanedioic acid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid (2- polyamide polymers obtainable from aliphatic, cycloaliphatic or aromatic dicarboxylic acids such as chloroterephthalic acid), 2-methylterephthalic acid, 5-methylisophthalic acid and the like; And copolymers of the polyamide resins, and these may be used alone or in combination of two or more thereof.

In some embodiments, polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide-12, terephthalic acid or isophthalic acid based polyamides, aliphatic polyamides, aromatic polyamides or air thereof Coalescing may be used alone, or two or more thereof may be mixed and used. General structural formulas of some resins are as follows.

<Polyamide-6>

-[-HN- (CH ₂ ) ₅ -CO-]-

<Polyamide-66>

-[-HN- (CH ₂ ) ₆ -NHCO- (CH ₂ ) ₄ -CO-]-

<Polyamide-66 / 6>

-[-HN- (CH ₂ ) ₆ -NHCO- (CH ₂ ) ₄ -CONH- (CH ₂ ) ₅ -CO-]-

The relative viscosity of the polyamide resin (a solution of 1 g of polymer in 100 ml of 90% formic acid, measured at 25 ° C.) may be 2.0 to 3.7 poise, and in other embodiments, the number average molecular weight may be approximately 5,000 to 70,000.

Preferably the polyamide resin consists of polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide-12, polyterephthalamide, polyisophthalamide, polyaramid and copolymers thereof At least one selected from the group.

The content of the polyamide resin is preferably 4.99 to 45% by weight based on the total weight of the composition.

 (b) polyester resin

The polyester resin used in the hybrid fiber of the present invention may mean a high molecular compound having an ester bond in the main chain. Examples of polyester resins include homopolymers, copolymers or mixtures thereof obtainable by condensation of dicarboxylic acids (or ester-formable derivatives thereof) with diols (or ester-formable derivatives thereof). do.

In one embodiment, examples of the dicarboxylic acid are aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, 1,4-, 1,5-, 2,6- or 2,7-naphthalenedicar Acids, bis ( p -carboxyphenyl) methane, anthracenedicarboxylic acid, 4,4'-diphenyletherdicarboxylic acid, 5-sodium sulfoisophthalic acid and the like; Aliphatic dicarboxylic acids such as adipic acid, sebacic acid, azelaic acid, dodecanedioic acid and the like; Alicyclic dicarboxylic acids such as 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and the like; Or ester-formable derivatives thereof, and the like, but is not limited thereto. In some embodiments, the dicarboxylic acid may be used in the form of ester-formable derivatives thereof, such as derivatives substituted with alkyl, alkoxy, halogen, and the like, esters with lower alcohols such as dimethyl esters. .

In another embodiment, examples of the diol include aliphatic glycols having 2 to 20 carbon atoms such as ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, Decamethylene glycol, cyclohexanedimethanol, cyclohexanediol and the like; Long chain glycols having a molecular weight of 400 to 6,000 such as polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, and the like; Or ester-formable derivatives thereof, and the like, but is not limited thereto. In some embodiments, the diol can be used in the form of ester-formable derivatives thereof, such as derivatives substituted with alkyl, alkoxy, halogen, and the like.

In some embodiments, examples of their homopolymers or copolymers include polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polybutylene (terephthalate / adipate), polybutylene (terephthalate / Sebacate), polybutylene (terephthalate / decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate / isophthalate), polyethylene (terephthalate / adipate), polyethylene (terephthalate / 5 Sodium sulfoisophthalate), polybutylene (terephthalate / 5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, polycyclohexanedimethylene terephthalate, and the like. It is not.

In other embodiments, in addition to the above compounds, examples of polyester resins include copolymerizable monomers such as hydroxycarboxylic acids such as glycolic acid, hydroxybenzoic acid, hydroxyphenylacetic acid, naphthylglycolic acid, lactic acid, and the like. ; Polyester resins copolymerized with lactone compounds such as propiolactone, butyrolactone, caprolactone, valerolactone and the like can be included. In another embodiment, examples of polyester resins include polyfunctional ester forming components such as trimetalolpropane, trimetirolethane, pentaerythritol, trimellitic acid, to the extent that they may have thermoplastics. , A trimesic acid, a compound using pyromellitic acid, or a polyester resin having a crosslinked structure may be included.

The polyester resin may be recycled in a general process of recycling thermoplastic resins and the like. Recycled polyesters can be obtained in bottles, the textile industry, film containers and other textiles and the like.

Preferably the polyester resin is polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polybutylene (terephthalate / adipate), polybutylene (terephthalate / sebacate), polybutylene ( Terephthalate / decanedicarboxylate), polybutylenenaphthalate, polyethylene terephthalate, polyethylene (terephthalate / isophthalate), polyethylene (terephthalate / adipate), polyethylene (terephthalate / 5-sodium sulfoisophthalate), Polybutylene (terephthalate / 5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, polycyclohexanedimethylene terephthalate

The content of the polyester resin can be easily varied depending on the desired physical properties, in a preferred embodiment the content of the polyester resin is 54.99 to 95% by weight based on the total weight of the melt spinning liquid.

 (c) epoxy resin

를 함유하는 화합물을 사용할 수 있다. 용융블렌드 제조시 컴파운딩 에폭시 수지를 폴리아미드 및/또는 폴리에스테르와 함께 첨가함으로써, 화학결합을 통해 폴리아미드 수지와 폴리에스테르 수지와의 상용성이 개선된 얼로이 수지를 제공할 수 있다.In the present invention, the epoxy resin is at least two epoxy groups per molecule

The compound containing can be used. By adding a compounding epoxy resin together with polyamide and / or polyester in the melt blend preparation, it is possible to provide an alloy resin having improved compatibility with the polyamide resin and the polyester resin through chemical bonding.

In one embodiment, examples of epoxy resins include, but are not limited to, diglycidyl ether of bisphenol A (DGEBA) type epoxy resin, DGEBF (diglycidyl ether of bisphenol F) type epoxy resin, hydrogenated bisphenol A (BPA) type epoxy resin, But are not limited to, cyclic aliphatic epoxy resins, rubber modified epoxy resins, aliphatic polyglycidyl type epoxy resins, glycidyl amine type epoxy resins, and the like. These may be used individually or in mixture of 2 or more types, respectively.

In one embodiment, the epoxy resin is obtained by reacting epichlorohydrin with a compound containing, for example, bisphenol A or F modified with bisphenol A, bisphenol F, hydrogen or bromine, or two or more hydroxy groups, It can be easily purchased and used on the market.

In one embodiment, the number of functional groups in the epoxy resin may be one or more, for example four or more, depending on the degree of polymerization and the type of chemical. In one embodiment, the epoxy resin can be both liquid and solid.

In one embodiment, the equivalent weight of epoxy resin is 2,1000 to 6,000 g / eq., Preferably 2,500 to 6,000 g / eq.

In one embodiment, the content of the epoxy resin is preferably 0.01 to 10% by weight based on the total weight of the composition. In another embodiment, the content of epoxy resin is more preferably from 0.05 to 7% by weight, more preferably from 0.1 to 5% by weight. If the epoxy resin content exceeds the above range, for example, the viscosity of the blend may be high, or the flowability of the composition may be deteriorated, resulting in poor productivity and problems in processing. On the other hand, when the content of the epoxy resin is less than the above range or does not use an epoxy resin, the polyamide and polyester do not bond with each other, so that when the blend is formed, not only are they separated from each other and the radioactivity is poor, but the strength of the finally produced fiber Physical properties such as elasticity may be reduced.

In some embodiments, depending on the desired final properties, other polymeric resins, such as polyethylene, polystyrene, polypropylene, ABS resins, polycarbonates, polyphenylene sulfides, polyphenylene oxides, polyacetals, polysulfones , Polyether sulfone, polyether imide, polyether ketone, polylactic acid resin, poly sulfone resin, elastomer resin, or mixtures thereof can be used together.

In other embodiments, antioxidants generally used as plastics processing agents, without departing from the object of the present invention; Heat stabilizer; Ultraviolet absorbers such as aromatic amines, hindered phenolic compounds, phosphorus compounds and sulfur compounds; Processing dispersant; Pigments; dyes; Surfactants; Release agents; Lubricant; Plasticizers; Antibacterial agents; Antifouling agents; And / or electroconductive additives; Oilproofing agents; Melt viscosity enhancers; Flame retardants or mixtures thereof may be added as additives to impart various effects to the composition.

Polymer fibers are part of artificial fibers. The term fiber refers to a filament or a collection of chopped filaments, cracks or processed filaments. On the other hand, the expression fiber or filament in the present specification generally refers to fibers or filaments (eg, "core-sheath" type fibers) prepared by melt spinning from the melt composition.

Melt spinning is a method of making polymer fibers that melts a polymer and passes through a discharge port (die) having several, in particular one to thousands, holes. The molten fibers are cooled, solidified and wound up. Stretching of the fibers in both melting and solidification steps is provided to orient the polymer chains along the fiber axis.

The multifilament produced in the present invention is characterized by exhibiting excellent tensile strength, tensile elongation and excellent emissivity.

The multifilament of the present invention uses a known extruder to blend polyamide resins, polyester resins, and epoxy resins into the molten phase, for example a single-screw extruder or twin screw extruder ( The blended process using a twin-screw extruder is performed to make blended chips. The general range of the in-cylinder temperature of the extruder can be set according to the melting point of the resin. As an example, when using a polyamide-6 resin, it can be set to 250 degreeC, and when using a polyamide-66 resin, it can be set to 280 degreeC. In addition, in the present invention, the alloy resin composition may be melt-spun according to a general process well known in the textile industry to produce a fiber in a desired form. The form and production method are not particularly limited.

The blended chip By normal process Spin and stretch to produce multifilaments.

The filament discharged from the spinning device is solidified while passing through the coagulation bath, and is drawn and wound continuously. At this time, if the melting temperature is less than 250 ℃ extrusion is difficult due to the pack pressure rise, if the melting temperature exceeds 300 ℃ decomposition of the polymer is serious.

In the spinning process, the spinning speed is preferably 1000 to 3500 m / min, and the winding speed is generally 1500 m / min to 6,500 m / min, preferably 2,000 m / min to 4,500 m / min.

In the present invention, the multifilament is preferably drawn at a draw ratio of 2.5 to 4.0.

The melt-spun fibers can be extruded at the outlets in different cross-sectional shapes, for example circular, triangular, pentagonal, octagonal, hollow and other shapes. Triangle fibers reflect more light and give the fabric a shine.

Spun yarn can be stretched and optionally processed, for example, air-jet texturing or mechanical crimp texturing, or other known methods may be used. have.

The invention also relates to yarns made from the fibers of the invention. Yarn is a long-fiber intersected fiber that can be used as a good way to produce textiles, sewing, knitting, knitting, weaving, embroidery and rope. Thread is a yarn form that can be needled by hand or machine.

Yarns according to the present invention are, for example, low oriented yarns (LOY), partially oriented yarns (POY) and / or fully drawn yarns (FDY).

Yarns, fibers and filaments used in the present invention may be of any cross-sectional shape. For example, it may be round, flat, serrated or grooved in a kidney bean shape and multilobate, in particular trilobite or five leaf (when it is X-shaped, hollow, square, triangular, oval or other shape). pentalobate).

In general, the multifilaments produced in the present invention are characterized in that the fineness is from 1.9 dtex (ie greater than 1.9 g / 10 000 meters) to 130 dtex, preferably not greater than 100 dtex. Preferably, the fineness of the yarns, fibers and filaments of the present invention is from 1.9 to 100 dtex, more preferably from 1.9 to 66 dtex.

Yarns, yarns and / or fibers can be used in textile products such as garments, carpet and floor finishes, wall finishes, and the like. The fibers, yarns and / or yarns produced in the present invention can be used to make new fabrics, carpets and other articles made by conventionally well known methods. The processed yarn is ideally suited for producing carpets using methods known to those skilled in the art, including tufting, weaving, bonding, needle room and knitting. It is preferably used. For a detailed description of this method, reference may be made to those described in "Synthetic Fiber Materials" (pp134-140, H. Brody, Longman 1994). It is incorporated herein by reference.

The present invention also relates to an article as described above which also comprises the multifilament. The multifilaments according to the invention can be woven or knitted in the form of woven or knitted fabrics.

The following examples are intended to further illustrate features and advantages of the subject matter of the present disclosure, but are not limited to the following examples. The subject matter of the present disclosure should not be considered limited to the specific embodiments and examples described herein. In view of the present disclosure, in addition to various exemplary embodiments and embodiments, those skilled in the art will readily recognize that modifications, substitutions, additions, and combinations of some of the configurations disclosed herein are possible.

[Example]

Manufacturing example

In Examples 1 to 4 and Comparative Examples 1 to 4 of the present invention, the respective components are classified and described as follows.

<Thermoplastic Polyamide Resin>

A-1: Thermoplastic polyamide-66 resin (trade name Technyl 23A, manufactured by Rhodia).

A-2: Thermoplastic Polyamide-6 Resin {trade name Toplamide 1011, Hyosung Products}.

<Thermoplastic Polyester Resin>

B-1: Polyethylene terephthalate resin {trade name ESLON A-9056, Woongjin Chemical product}

B-2: polybutylene terephthalate resin {trade name TRIBIT 1500 NA, product of Samyang Corporation}

<Epoxy resin>

C-1: DGEBA type epoxy resin {brand name YD-019, Kukdo Chemical Co., Epoxy equivalent: 2500-3800 g / eq}.

C-2: DGEBA type epoxy resin {brand name YD-011, Kukdo Chemical Co., Epoxy equivalent: 450-500 g / eq}.

C-3: Ethylene resin to which the glycidyl methacrylate group is grafted {brand name Lotarder A8900, Arkema product}

Examples 1-4 and Comparative Examples 1-4

The melt blend spinning of a conventionally pelletized chip, wherein one polyamide resin, one polyester resin, and one epoxy resin described above are added to a twin screw mixer at the following composition ratio and melt-mixed at 250 to 300 ° C. Synthetic fibers were prepared to have a single yarn fineness of 3.4 denier by setting the spinning temperature at 285 ° C. and the spinning speed at 3,000 m / min. The synthetic fiber obtained by spinning / winding was stretched using a separate stretching device so that the draw ratio was 2.0 to prepare the synthetic fiber of the present invention.

The overall characteristics were evaluated by the following evaluation method, and the results are shown in Tables 1 and 2 below. Evaluation items and analysis methods are as follows.

A) Tensile strength: tested according to the test method described in KS K 0412. The unit is cN.

B) Elongation: Tested according to the test method described in KS K 0412. The unit is%.

Radioactive: Yarn trim was observed upon spinning. The criteria are as follows.

No trimming

    5 4 3 2 1

Ingredient (% by weight) Example 1 Example 2 Example 3 Example 4 A-1 30 - - 30 A-2 - 30 30 - B-1 67 - 67 67 B-2 - 67 - - C-1 3 3 3 - C-2 - - - 3 Tensile strength (cN) 208.60 209.20 214.30 208.60 Shinto (%) 19.4 20.9 21.5 19.4 Radioactive 5 5 5 4

Ingredient (% by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 A-1 50 57 50 60 A-2 - - - - B-1 35 40 40 40 B-2 - - - - C-1 15 - - - C-3 - 3 10 - Tensile strength (cN) 158.40 - 148.60 - Shinto (%) 17.4 - 14.4 - Radioactive 2 One 2 One

Tables 1 and 2 show that the epoxy resin is commercialized in the blend of polyamide 6 or polyamide 66 and polyethylene terephthalate or polybutylene terephthalate having no compatibility by using an epoxy resin in the present invention to form fibers. have. When the addition amount of the epoxy resin was too large (Comparative Example 1), the viscosity of the blend resin was too high and the radioactivity was poor. When the epoxy resin was not used (Comparative Example 4), the physical properties could not be evaluated because the yarn was not prepared due to lack of compatibility due to severe trimming during spinning.

When compatibility was given to the ethylene resin to which the glycidyl methacrylate group known in the prior art was grafted (Comparative Examples 2 and 3), all of strength, elongation, and radioactivity were poor.

Claims (8)

melting a) 4.99 to 45 wt% of thermoplastic polyamide resin, b) 54.99 to 95 wt% of thermoplastic polyester resin, and c) 0.01 to 10 wt% of epoxy resin at 250 to 300 ° C. to form a blend; And spinning and stretching the blend to produce synthetic fibers. The method of claim 1, wherein the epoxy resin is a DGEBA (diglycidyl ether of bisphenol A) type epoxy resin, DGEBF (diglycidyl ether of bisphenol F) type epoxy resin, hydrogenated BPA (hydrogenated bisphenol A) type epoxy resin, brominated epoxy resin, Preparation of polyester synthetic fiber, characterized in that at least one member selected from the group consisting of cycloaliphatic epoxy resin, rubber modified epoxy resin, aliphatic polyglycidyl epoxy resin and glycidyl amine epoxy resin Way. The method of claim 1 or 2, wherein the epoxy equivalent of the epoxy resin is 2,100 to 6,000 g / eq. The method according to any one of claims 1 to 3, wherein the epoxy equivalent of the epoxy resin is 2,500 to 6,000 g / eq. The method according to any one of claims 1 to 4, wherein the composition comprises 0.05 to 7% by weight of epoxy resin. The polyamide resin according to any one of claims 1 to 5, wherein the polyamide resin is polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide-12, terephthalic acid-based polyamide, isophthalic acid-based A method for producing a polyester synthetic fiber, characterized in that at least one member selected from the group consisting of polyamide, polyaramid and copolymers thereof. The polyester resin according to any one of claims 1 to 6, wherein the polyester resin is polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polybutylene (terephthalate / adipate), polybutylene (tere). Phthalates / Sebacates), Polybutylene (terephthalate / decanedicarboxylate), Polybutylene naphthalate, Polyethylene terephthalate, Polyethylene (terephthalate / isophthalate), Polyethylene (terephthalate / adipate), Polyethylene (terephthalate) / 5-sodium sulfoisophthalate), polybutylene (terephthalate / 5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate and polycyclohexanedimethylene terephthalate Manufacturing method of polyester synthetic fiber, characterized in that . a) 4.99 to 45% by weight of polyamide resin,
b) 54.99 to 95 weight percent of polyester resin, and
c) Polyester synthetic fibers comprising 0.01 to 10% by weight epoxy resin.