KR101273357B1 - Polyethyleneterephthalate yarn with good thermal performance and high tenacity for industrial use - Google Patents

Polyethyleneterephthalate yarn with good thermal performance and high tenacity for industrial use Download PDF

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KR101273357B1
KR101273357B1 KR1020060136142A KR20060136142A KR101273357B1 KR 101273357 B1 KR101273357 B1 KR 101273357B1 KR 1020060136142 A KR1020060136142 A KR 1020060136142A KR 20060136142 A KR20060136142 A KR 20060136142A KR 101273357 B1 KR101273357 B1 KR 101273357B1
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polyethylene terephthalate
strength
heat treatment
yarn
elongation
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KR1020060136142A
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KR20080061155A (en
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조대환
한규찬
심동석
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주식회사 효성
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/04—Heat-responsive characteristics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/063—Load-responsive characteristics high strength
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/20—Industrial for civil engineering, e.g. geotextiles
    • D10B2505/204—Geotextiles

Abstract

본 발명은 수평균 분자량이 35,000 ~ 50,000인 폴리에틸렌테레프탈레이트 칩을 방사하여 제조된 강도가 10.0 ~ 11.5g/d 이고, 절단신도 10 ~ 13%이며, 고온수축율이 7 ~ 11%인 폴리에틸렌테레프탈레이트 사에 있어서, 190℃의 온도로 60초 동안 열처리 하였을 때, 2 ~ 5% 의 초기 신율대에서 강력 유지율이 40% 이상이고 열처리 후의 강도가 9.5g/d 이상인 열 특성이 우수한 폴리에틸렌테레프탈레이트 산업용 사를 제공한다. 본 발명의 고강력 섬유는 토목용 지오그리드 제품, 산업용 웨빙벨트 용에 유용하다. The present invention is produced by spinning a polyethylene terephthalate chip having a number average molecular weight of 35,000 ~ 50,000, the strength is 10.0 ~ 11.5g / d, the elongation at break is 10 ~ 13%, the high temperature shrinkage of polyethylene terephthalate 4 In the heat treatment for 190 seconds at a temperature of 190 ℃, polyethylene terephthalate industrial yarn having excellent thermal properties with a strong retention of 40% or more and an intensity after heat treatment of 9.5 g / d or more at an initial elongation of 2 ~ 5% to provide. The high strength fibers of the present invention are useful for civil geogrid products, industrial webbing belts.

폴리에틸렌테레프탈레이트, 산업용 사, 고강력, 지오그리드 Polyethylene Terephthalate, Industrial Yarn, High Strength, Geogrid

Description

열 특성이 우수한 산업용 고강력 폴리에틸렌테레프탈레이트 섬유{Polyethyleneterephthalate yarn with good thermal performance and high tenacity for industrial use}Polyethyleneterephthalate yarn with good thermal performance and high tenacity for industrial use

도 1은 본 발명에 따른 폴리에틸렌테레프탈레이트 사의 제조공정을 개략적으로 도시한 것이다.Figure 1 schematically shows a manufacturing process of polyethylene terephthalate company according to the present invention.

도 2는 본 발명의 1000D 폴리에틸렌테레프탈레이트 사에 대한 열처리 전후의 힘-변형 곡선이다.Figure 2 is a force-strain curve before and after heat treatment for the 1000D polyethylene terephthalate yarn of the present invention.

본 발명은 수평균 분자량이 35,000 ~ 50,000인 폴리에틸렌테레프탈레이트 칩을 방사하여 제조된 강도가 10.0 ~ 11.5g/d 이고, 절단신도 10 ~ 13%이며, 고온수축율이 7 ~ 11%인 폴리에틸렌테레프탈레이트 사에 있어서, 190℃의 온도로 60초 동안 열처리 하였을 때, 2 ~ 5% 의 초기 신율대에서 강력 유지율이 40% 이상이고 열처리 후의 강도가 9.5g/d 이상인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 산업용 사에 관한 것이다. 본 발명에 따른 섬유는 매우 높은 강도 특성을 가지면서 열처리 후에도 높은 강도를 유지하는 특성을 지녀 토목용 지오그리드 및 웨빙용 벨트와 같은 산업용 소재로 적합하다. 이와 같은 본 발명에 따른 섬유는 열처리 후에도 초기 신율 대에서 높은 강력 유지율을 가지는 특징이 있다. The present invention is produced by spinning a polyethylene terephthalate chip having a number average molecular weight of 35,000 ~ 50,000, the strength is 10.0 ~ 11.5g / d, the elongation at break is 10 ~ 13%, the high temperature shrinkage of polyethylene terephthalate 4 In the polyethylene terephthalate industry, characterized in that when the heat treatment for 190 seconds at a temperature of 190 ℃, the strength retention is 40% or more at the initial elongation of 2 to 5% and the strength after heat treatment is 9.5g / d or more It is about. The fiber according to the present invention has very high strength properties and maintains high strength even after heat treatment, and thus is suitable for industrial materials such as civil geogrids and webbing belts. Such a fiber according to the present invention is characterized by having a high strength retention in the initial elongation even after heat treatment.

폴리에스테르 섬유의 강도를 높이기 위한 종래의 방법으로는 고유점도 1.0 이상의 고점도 칩을 용융한 후, 용융된 폴리머 온도를 310℃까지 높여서 충분히 녹이고 후드 길이를 280mm, 후도 온도를 340℃로 설정하고 퀀칭(quenching) 에어의 온도를 16 ~ 18℃로 하여서 폴리머를 고화시킨다. 이어서 고뎃 롤러에서 저속권취하여 얻은 미연신사를 1단 및 2단으로 연신배율 6.0까지 직접 연신한 후 릴랙스를 시켜 권취하는 방법이었다. 이때 저속 권취로 미연신시의 배향도를 낮추어 고배율의 연신을 부여하여 고강도의 섬유를 얻었다. 상기 방법으로 제조되며 산업용 로프 등의 제품에 널리 사용되는 폴리에스테르 사의 물성은 강도 9.5g/d 이하, 절단신도 12 ~ 18%이고 열처리 후의 강도는 8.5g/d 이하이고 열처리 후의 초기 신율대에서 강력 유지율이 15 ~ 30% 대로 매우 낮다. In the conventional method for increasing the strength of polyester fibers, after melting a high viscosity chip having an intrinsic viscosity of 1.0 or higher, the melted polymer temperature is raised to 310 ° C to sufficiently melt, and the hood length is set to 280 mm and the back temperature is set to 340 ° C and quenched. (quenching) The polymer is solidified by setting the temperature of the air to 16-18 ° C. Subsequently, the unstretched yarn obtained by winding at a low speed roller was stretched directly to a draw ratio 6.0 in one and two stages, and then relaxed and wound. At this time, the orientation degree at the time of non-expansion was lowered by low-speed winding, the high magnification was extended | stretched, and the high strength fiber was obtained. The physical properties of polyester yarns manufactured by the above method and widely used in products such as industrial ropes have a strength of 9.5 g / d or less, an elongation at break of 12 to 18%, a strength after heat treatment of 8.5 g / d or less, and a high strength at initial elongation after heat treatment. The retention rate is very low, from 15 to 30%.

종래의 방사 기술을 사용하여 더 높은 강도를 얻기 위해서 종래의 연신 배율보다 연신 배율을 높일 경우 방사 사절이 많이 발생하는 공정상 문제와 품질문제가 발생하여 후 공정성이 나빠진다. 그러므로 제조비용의 상승 및 제품의 질이 저하되어 기존의 기술로는 고 강도 및 열특성이 우수한 산업용 사를 얻기 힘들었다.In order to obtain higher strength by using a conventional spinning technique, when the stretching ratio is increased than the conventional stretching ratio, process problems and quality problems that cause many yarns are generated, resulting in poor post-processability. Therefore, it is difficult to obtain an industrial yarn having high strength and thermal characteristics with the existing technology due to the increase in manufacturing cost and deterioration of product quality.

본 발명의 목적은 수 평균 분자량이 35,000 ~ 50,000인 폴리에틸렌테레프탈레이트 칩을 용융 방사하고 고연신 배율로 조절하여 강도가 10.0g/d ~ 11.5g/d 이고 절단신도가 10.0 ~ 13.0%, 고온수축율이 7.0 ~ 13.0 %이고, 190℃의 온도로 60초 동안 열처리 하였을 때, 2% ~ 5%신율 대에서 40% 이상의 강력 유지율과 열처리 후의 강도가 9.5g/d 이상으로 열 특성이 우수한 폴리에틸렌테레프탈레이트 산업용 사를 제공하는 것이다. It is an object of the present invention to melt-spun polyethylene terephthalate chips having a number average molecular weight of 35,000 to 50,000 and adjusted at a high draw ratio to have a strength of 10.0 g / d to 11.5 g / d, an elongation at break of 10.0 to 13.0%, and high temperature shrinkage. Polyethylene terephthalate industrial with excellent thermal properties of 7.0 ~ 13.0% and heat treatment at 190 ℃ for 60 seconds, more than 40% of strong retention at 2% ~ 5% elongation and 9.5g / d of strength after heat treatment It is to provide four.

이러한 특징을 가진 본 발명에 따른 섬유는 폴리머가 용융과정에서 최대한 열분해가 일어나지 않게 하여 폴리머 자체의 고유 물성을 유지할 수 있도록 하고 높은 분자량의 폴리머 순도를 유지하기 위해 팩 필터를 강화하고 연신 배율을 높일 수 있도록 후드 길이를 조절하고 열에 안정한 성능을 얻기 위해 와인더 직전의 고뎃드 롤러의 표면 온도를 200℃ ~ 230℃로 하여 연신하는 방법에 의하여 제조될 수 있다.The fiber according to the present invention having such a feature can prevent the polymer from pyrolyzing as much as possible in the melting process, thereby maintaining the inherent properties of the polymer itself, and enhancing the pack filter and increasing the draw ratio in order to maintain high molecular weight polymer purity. In order to adjust the length of the hood so as to obtain heat stable performance, the surface temperature of the high wind roller immediately before the winder may be prepared by a method of stretching at 200 ° C to 230 ° C.

본 발명의 적절한 실시 형태에 따르면. 수평균 분자량이 39,000인 폴리에틸렌테레프탈레이트 칩을 방사하여 얻은 폴리에틸렌테레프탈레이트 사의 강도가 10.0g/d ~ 11.5g/d 이고; 절단신도가 10.0 ~ 13.0%; 고온수축율이 7.0 ~ 13.0 %이고; 190℃의 온도로 60초 동안 열처리 하였을 때, 2% ~ 5%신율 대에서 40% 이상의 강력 유지율; 열처리 후의 강도가 9.5g/d 이상; 열 특성이 우수한 폴리에틸렌테레프탈레이트 산업용 사에 관한 것이다. According to a suitable embodiment of the present invention. The strength of polyethylene terephthalate yarn obtained by spinning a polyethylene terephthalate chip having a number average molecular weight of 39,000 is 10.0 g / d to 11.5 g / d; Cleavage elongation 10.0-13.0%; High temperature shrinkage is 7.0-13.0%; When heat treated for 60 seconds at a temperature of 190 ℃, strong retention of 40% or more in the range of 2% to 5% elongation; Strength after heat treatment is 9.5 g / d or more; The present invention relates to a polyethylene terephthalate industrial yarn having excellent thermal properties.

상기 폴리에틸렌테레프탈레이트 멀티필라멘트의 개수가 100 또는 400개 인 것이 바람직하다. 이때 멀티 필라멘트의 개수가 100 미만이면 산업용 고강력사로 강도가 낮고, 400개를 초과하면 방사성이 떨어진다.The number of the polyethylene terephthalate multifilament is preferably 100 or 400. At this time, if the number of multifilament is less than 100, the strength is low as industrial high-strength yarns, if more than 400, the radioactivity is lowered.

상기 폴리에틸렌테레프탈레이트 멀티필라멘트의 총섬도가 500 내지 10000 데니어인 것이 바람직하다. 이때 멀티 필라멘트의 총섬도가 500 데니어 미만이면 산업용 고강력사로 강도가 낮고, 10000 데니어를 초과하면 방사성이 떨어진다.It is preferable that the total fineness of the said polyethylene terephthalate multifilament is 500-10000 denier. At this time, if the total fineness of the multifilament is less than 500 denier, the strength is low as industrial high-strength yarn, and if it exceeds 10000 denier, the radioactivity is inferior.

본 발명에서는 토목용 지오그리드 및 산업용 웨빙용 벨트를 제조 시 후공정에서 사용하는 열에 의해 원사의 높은 물성을 최대한 유지하기 위한 방법으로 폴리에틸렌테레프탈레이트 사의 열처리 후에 강력을 높게 유지하기 위해 제안한다. The present invention proposes to maintain high strength after heat treatment of polyethylene terephthalate in a method for maintaining the high physical properties of the yarn by the heat used in the post-process during the production of civil geogrid and industrial webbing belt.

본 발명에 따른 폴리에틸렌테레프탈레이트 사의 강도가 10.0g/d ~ 11.5g/d 이고 절단신도가 10.0 ~ 13.0%, 고온수축율이 7.0 ~ 13.0 %이고 190℃의 온도로 60초 동안 열처리 하였을 때, 2% ~ 5%신율 대에서 40% 이상의 강력 유지율을 가지고 열처리 후의 강도가 9.5g/d 이상으로 열 특성이 우수한 특징을 가진다. Polyethylene terephthalate yarn according to the present invention has a strength of 10.0g / d ~ 11.5g / d, and an elongation at break of 10.0 ~ 13.0%, high temperature shrinkage of 7.0 ~ 13.0% and heat treatment for 190 seconds at a temperature of 190 ℃, 2% It has a strong retention of 40% or more at a ˜5% elongation and has excellent thermal properties with strength after heat treatment of 9.5 g / d or more.

아래에서 본 발명을 첨부된 도면에 따라 상세하게 설명한다. 수평균 분자량이 35,000 ~ 50,000인 폴리에스테르 칩을 익스트루더(1)에서 용융한 후 팩 필터(필터의 사이즈 30μm)(3)에서 필터링 되어진다. 후드히터(4~6)의 온도를 300 ~ 450℃로 높여 방사된 필라멘트가 최대한 무정 및 무배향의 구조를 가질 수 있도록 후드히터 아래의 퀀칭(quenching) 에어의 온도를 낮추어 흡기(7) 및 배기(8) 시켜준다. 고화된 사를 오일링 롤러에서 적당량의 오일을 부여한 후 고뎃드 롤러 2(10)와 롤러 3(11)에서 예비 연신을 거친 다음 고뎃드 롤러 3(11)과 롤러 4(12)에서 2차의 고 비율의 연신을 수행하고 고뎃드 롤러 5(13)의 온도를 200℃ ~ 230℃로 높여 섬 유내의 결정을 높이고 고뎃드 롤러 4(12)와 롤러 5(13) 상에서 이완시키며 권취한다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. A polyester chip having a number average molecular weight of 35,000 to 50,000 is melted in the extruder 1 and then filtered in a pack filter (size of the filter 30 μm) 3. The temperature of the quenching air under the hood heater is lowered to increase the temperature of the hood heaters 4 to 6 to 300 to 450 ° C. so that the radiated filaments can have an amorphous and unoriented structure. (8) Let it be. After applying the proper amount of oil from the oiling roller to the solidified yarn, preliminary stretching is performed on the high rollers 2 (10) and the roller 3 (11), and then the secondary rollers on the high rollers 3 (11) A high ratio of stretching is performed and the temperature of the gond roller 5 (13) is raised to 200 ° C. to 230 ° C. to increase the crystals in the fiber, and to wind on the gond roller 4 (12) and the roller 5 (13).

이와 같은 공정에서 제조된 폴리에스테르 사는 방사 작업성이 좋아 얻어지는 원사의 품질이 우수하고 고강도로 열적 성질이 우수하여 후 공정에서 열처리가 필요한 토목용 지오그리드, 산업용 웨빙 등의 용도로 유용하게 사용될 수 있다.Polyester yarns produced in such a process is good in spinning workability is excellent quality of the yarn obtained and excellent thermal properties with high strength can be usefully used for civil geogrids, industrial webbing, etc. that require heat treatment in the post-process.

실시예 및 비교예의 물성 평가는 아래와 같이 측정 또는 평가하였다. The physical property evaluation of an Example and a comparative example was measured or evaluated as follows.

1) 폴리에스테르 칩의 분자량 측정 방법1) Measuring method of molecular weight of polyester chip

폴리에스테르 칩 0.05g을 Chloroform과 HFIP(1,1,1,3,3,3-Hexafluoro-2-propanol) 의 98/2 혼합액 1ml 로 80℃에서 1시간 용해한다. 용해액을 Chloroform 9ml로 희석후 Filtering 한다.0.05 g of a polyester chip is dissolved in 80 ml of a mixed mixture of Chloroform and HFIP (1,1,1,3,3,3-Hexafluoro-2-propanol) in 1/2 at 80 ° C for 1 hour. The solution is diluted with 9 ml of chloroform and filtered.

Instrument : Agilent 1100 GPC system       Instrument: Agilent 1100 GPC system

Column : Waters styragel HR 5E+4E       Column: Waters styragel HR 5E + 4E

Eluent : Chloroform과 HFIP 의 98/2 혼합액       Eluent: 98/2 mixture of chloroform and HFIP

Flow Rate : 1.0 ml/min       Flow Rate: 1.0 ml / min

Detection : RI Detector       Detection: RI Detector

Standard 시료 : PET       Standard sample: PET

위와 같은 조건에서 수평균 분자량 및 중량평균 분자량을 측정한다.The number average molecular weight and the weight average molecular weight are measured under the above conditions.

2) 원사의 강신도 측정방법 2) How to measure the elongation of yarn

원사를 표준상태인 조건, 즉 25℃ 온도와 상대습도 65%인 상태인 항온 항습실에서 24시간 방치 후 ASTM 2256 방법으로 시료를 인장 시험기를 통해 측정한다.After leaving the yarn in a standard condition, that is, a constant temperature and humidity chamber at a temperature of 25 ° C. and a relative humidity of 65% for 24 hours, the sample is measured by a tensile tester using the ASTM 2256 method.

3) 고온수축율 측정방법3) How to measure high temperature shrinkage

원사를 표준상태, 즉 25℃ 온도와 상대습도 65%인 항온 항습실에서 24시간 방치 한다. 150℃ Oven에서 30분 방치한다. 원사를 표준상태에서 24시간 방치 한다. 원사의 줄어든 신율을 측정한다. (L0 : 시료를 표준상태에서 24시간 방치 후 초하중(0.01g/d)하에서 측정한 길이, L1 : 일정시간 열을 가한 뒤 초하중(0.01g/d)하에서 줄어든 시료의 길이)The yarn is left for 24 hours in a standard condition, that is, a constant temperature and humidity room with a temperature of 25 ° C. and a relative humidity of 65%. It is left to stand in 150 degreeC oven for 30 minutes. The yarn is left for 24 hours in the standard condition. Measure the reduced elongation of the yarn. (L 0 : Length measured under super load (0.01 g / d) after leaving the sample at standard condition for 24 hours, L 1 : Length of sample reduced under super load (0.01 g / d) after applying heat for a certain time)

Figure 112013008463942-pat00006
Figure 112013008463942-pat00006

4) 원사의 열처리 방법4) Heat treatment method of yarn

원사를 150℃ 온도 범위에서 테스트라이트에 무하중 또는 0.05g/d 하중을 부여한 후 45초 동안 처리한다. 처리된 원사를 상기 2)의 방법으로 강신도를 측정한다. The yarn is treated for 45 seconds after giving no load or 0.05 g / d load to the test light in the 150 ° C. temperature range. The elongation of the treated yarn is measured by the method of 2).

5) 열처리 후의 강력 유지율(%)5) Strong retention rate after heat treatment (%)

열처리 전의 강신도 물성과 열처리 후의 강신도 물성의 비율로 평가한다. It is evaluated by the ratio of the elongation property before heat treatment and the elongation property after heat treatment.

6) 작업성6) Workability

방사기의 한 장소에서 24시간 동안 관찰하여 고뎃드 롤러 상에서 사절이 발생하는 개수의 평균값을 파악한다.Observe for 24 hours at a location on the spinner to determine the average number of trimmings on the gond roller.

실시예 1 ~ 8 및 비교예 1 ~ 7 Examples 1 to 8 and Comparative Examples 1 to 7

수평균 분자량이 35,000 ~ 50,000인 폴리에스테르 칩을 지름 0.6mm, 길이와 직경비(L/D)가 3이고 구멍수 192개인 노즐을 통해 용융 폴리머를 압출하고 퀀칭(quenching)에어로 냉각시킨 다음 집속시켜 오일링하고 고뎃드 롤러 GR 4 속도를 2200m/min의 속도로 하여 1000데니어를 방사하여 표 1의 방사 조건으로 연신하였으며, 얻어진 원사의 물성을 측정하였다.A polyester chip having a number average molecular weight of 35,000 to 50,000 is extruded through a nozzle having a diameter of 0.6 mm, a length and diameter ratio (L / D) of 3, and a hole of 192 holes, and then cooled by quenching air and then concentrated. Oiling and spinning 1000 denier at a speed of the high chord roller GR 4 at a speed of 2200m / min was elongated under the spinning conditions of Table 1, the physical properties of the obtained yarn was measured.

[표 1][Table 1]

Figure 112013008463942-pat00007
Figure 112013008463942-pat00007

[표 2][Table 2]

Figure 112013008463942-pat00008
Figure 112013008463942-pat00008

본 발명은 후드히터의 온도와 퀀칭(quenching) 에어 온도를 최적화시킴으로서 높은 모듈러스, 고강도, 저절단신도율을 나타내며 동시에 영구 변형율이 적은 산업용 고강력 폴리에스테르 섬유를 제조할 수 있도록 한다.The present invention optimizes the temperature of the hood heater and the quenching air temperature, thereby producing high modulus, high strength, low cutting elongation, and at the same time making industrial high strength polyester fibers with low permanent strain.

본 발명은 폴리에스테르의 분자량과 Pack 내부의 필터링에 의해 폴리머의 순도를 높이고, 후드히터의 온도를 최적화시키고 고뎃드 롤러 5의 온도를 높게 함으로서 매우 높은 강도 특성을 가지면서 열처리 후에도 높은 강도를 유지하는 특성을 나타내는 산업용 고강력 폴리에틸렌테레프탈레이트 산업용 사를 제조할 수 있다. The present invention improves the purity of the polymer by the molecular weight of the polyester and the filtering inside the pack, optimizes the temperature of the hood heater and increases the temperature of the high roller roller 5 to maintain a high strength even after heat treatment while having a very high strength characteristics Industrial high strength polyethylene terephthalate industrial yarns exhibiting characteristics can be produced.

Claims (3)

수평균 분자량이 35,000 ~ 50,000인 폴리에틸렌테레프탈레이트 칩을 방사하여 제조된 강도가 10.0 ~ 11.5g/d 이고, 절단신도 10 ~ 13%이며, 고온수축율이 7 ~ 11%인 폴리에틸렌테레프탈레이트 멀티필라멘트에 있어서, In the polyethylene terephthalate multifilament having a strength of 10.0 to 11.5 g / d, an elongation at break of 10 to 13%, and a high temperature shrinkage of 7 to 11%, produced by spinning a polyethylene terephthalate chip having a number average molecular weight of 35,000 to 50,000. , 190℃의 온도로 60초 동안 열처리 하였을 때, 2 ~ 5% 의 초기 신율대에서 강력 유지율이 40% 이상이고 열처리 후의 강도가 9.5g/d 이상인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 멀티필라멘트. Polyethylene terephthalate multifilament characterized in that when the heat treatment for 190 seconds at a temperature of 190 ℃, in the initial elongation range of 2 to 5%, the strong retention is 40% or more and the strength after heat treatment is 9.5g / d or more. 제 1항에 있어서, 상기 폴리에틸렌테레프탈레이트 멀티필라멘트의 개수가 100 또는 400개 인 것을 특징으로하는 폴리에틸렌테레프탈레이트 멀티 필라멘트.The polyethylene terephthalate multifilament according to claim 1, wherein the polyethylene terephthalate multifilament is 100 or 400. 제 1항에 있어서, 폴리에틸렌테레프탈레이트 멀티필라멘트의 총섬도가 500 내지 10000 데니어인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 멀티필라멘트. The polyethylene terephthalate multifilament according to claim 1, wherein the total fineness of the polyethylene terephthalate multifilament is 500 to 10,000 denier.
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