WO2011002165A2 - Industrial polyethylene terephthalate multifilament - Google Patents

Industrial polyethylene terephthalate multifilament Download PDF

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Publication number
WO2011002165A2
WO2011002165A2 PCT/KR2010/003798 KR2010003798W WO2011002165A2 WO 2011002165 A2 WO2011002165 A2 WO 2011002165A2 KR 2010003798 W KR2010003798 W KR 2010003798W WO 2011002165 A2 WO2011002165 A2 WO 2011002165A2
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Prior art keywords
polyethylene terephthalate
multifilament
terephthalate multifilament
temperature
spinning
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PCT/KR2010/003798
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French (fr)
Korean (ko)
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WO2011002165A3 (en
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한규찬
이준호
양승철
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(주)효성
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Publication of WO2011002165A2 publication Critical patent/WO2011002165A2/en
Publication of WO2011002165A3 publication Critical patent/WO2011002165A3/en

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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
    • D01D5/084—Heating filaments, threads or the like, leaving the spinnerettes
    • 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
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes

Definitions

  • the present invention relates to polyethylene terephthalate multifilament fibers having a force-strain curve having a strength of at least 11.0 g / d and a toughness of at least 38.
  • the multifilament fibers according to the present invention have high strength, high modulus and low elongation and can be applied to the production of industrial high strength polyester fibers used as materials for industrial ropes, civil reinforcement, webbing or seat belts.
  • polyester yarn produced by such a conventional method has a strength of 10.5 g / d or less and a length of 11 to 15%.
  • the fiber according to the present invention is manufactured according to a method for producing high-strength polyethylene terephthalate at the same draw ratio by adjusting the speed of the polyethylene terephthalate polymer directly under the nozzle and the speed of the high roller 1 so as to increase the draw ratio. do.
  • the present invention is a method for producing a polyethylene terephthalate multifilament spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2, the temperature of the polyethylene terephthalate in the extender is 290 ⁇ 305 °C, polyethylene tere through the gear pump
  • the temperature of the phthalate is 295-310 degreeC
  • the diameter of the nozzle hole of a spinneret is 0.4-0.6mm
  • the ratio (L / D) of the hole length and hole diameter of a spinneret is 2-4
  • the spinning draft is 60-70
  • the length of the hood heater is 400 ⁇ 600mm
  • the temperature of the hood heater is 360 ⁇ 390 °C
  • the air supply amount of the rapid cooling chamber is 20 ⁇ 70mmAq
  • the exhaust capacity is 30 ⁇ 80mmAq polyethylene terephthalate multifilament It provides a method of manufacturing.
  • the present invention is to maintain the inherent properties of the polyester chip itself to the maximum and to optimize the spinning conditions, spinning workability and industrial rope, civil reinforcement material having a high modulus, high strength, low elongation due to the stretching of high magnification, Industrial super-strength polyester yarns useful for webbing, seat belts, and the like can be prepared.
  • Figure 1 schematically shows a manufacturing process of polyethylene terephthalate multifilament according to the present invention.
  • Figure 2 is a force-strain curve for monofilaments of the present invention and conventional 1000D polyethylene terephthalate multifilament.
  • the temperature of the polyethylene terephthalate in the extender 1 is 290 to 305.
  • the temperature of the polyethylene terephthalate passing through the gear pump 2 is 295 to 310 ° C
  • the diameter of the nozzle hole of the spinneret 3 is 0.4 to 0.6mm
  • the hole length and hole diameter of the spinneret 3 The ratio L / D is 2 to 4
  • the radiation draft is 60 to 70
  • the length of the hood heater 4 is 400 to 600 mm
  • the temperature of the hood heater 4 is 360 to 390 ° C
  • rapid cooling Provided is a method for producing polyethylene terephthalate multifilament, characterized in that the air supply amount of the chambers 5 and 6 is 20 to 70 mmAq and the exhaust amount is 30 to 80 mmAq.
  • a polyethylene terephthalate multifilament having a strength of 11.0 g / d or more and a toughness of 38 or more is provided.
  • the polyethylene terephthalate multifilament has a fineness of 4 to 30 denier of the monofilament, and the monofilament consists of 100 to 600 aggregates.
  • the fineness of the polyethylene terephthalate multifilament is from 400 denier to 30,000 denier.
  • one industrial product selected from the group consisting of industrial ropes, civil engineering reinforcements, webbing and seat belts comprising high strength polyethylene terephthalate multifilament.
  • Figure 1 schematically shows a manufacturing process of polyethylene terephthalate multifilament according to the present invention.
  • a polyester chip having an intrinsic viscosity in the range of 0.8 to 1.2 is melted by setting the temperature condition of the extender 1 low. At this time, the temperature of the molten polymer was set to 290 to 305 ° C. When the temperature of the polymer is lower than 290 ° C, spinning is difficult because the polymer is not uniformly melted. When the temperature of the polymer is higher than 305 ° C, the viscosity of the polymer is lowered and it is difficult to express high strength.
  • the gear pump 2 provides a temperature for thermal insulation, and at this time, the temperature of the polymer passing through the gear pump 2 may be 295 to 310 ° C. by lowering the set temperature of the thermal insulation of the gear pump 2. To adjust. If the temperature of the polymer is lower than 295 ° C is not good spinning workability, if the temperature of the polymer is higher than 310 ° C thermal decomposition occurs by high temperature loses the properties of high strength.
  • the diameter of the nozzle hole of the spinneret 3 was 0.4-0.6 mmphi. When the diameter of the nozzle hole was less than 0.4 mm ⁇ or exceeded 0.6 mm ⁇ , the radioactivity was not good.
  • the ratio (L / D) of the hole length and the hole diameter of the spinneret 3 was 2 to 4. When the ratio (L / D) of the hole length and hole diameter of the spinneret 3 was less than 2, the radioactivity was not good, and when the ratio (L / D) was more than 4, the pack pressure increased and the radioactivity was not good.
  • the spinning draft is maintained at 60 to 70 so as to impart high elongation on the roller roller. If the spinning draft was less than 60, the spinning pack pressure was increased, so that the radioactivity was not good. If the spinning draft was more than 70, it was difficult to express the high strength of the yarn.
  • the length of the hood heater (Hood Heater) 4 is preferably 400 ⁇ 600mm. If the hood heater is less than 400mm, the radiation is not good, if the hood heater is more than 600mm it is difficult to install the hood heater more than 600mm because it affects the portion of the radiating rapid cooling equipment.
  • the temperature of the hood heater 4 is preferably raised to 360 ⁇ 390 °C to create an atmosphere in the hood so that the spun fibers can have an amorphous and oriented structure as possible. If the temperature of the hood heater is less than 360 °C the radioactivity is not good, if the temperature of the hood heater exceeds 390 °C overheating the heater is difficult to raise any more temperature.
  • the amorphous, non-orientated yarn thus formed can be rapidly cooled using air.
  • the air supply amount was 20 to 70 mmAq (aqua) and the exhaust amount was 30 to 80 mmAq. If the air supply and the discharge were less than 20mmAq and 30mmAq, respectively, the polymer did not solidify uniformly, so that the radioactivity was not good. I could't.
  • the fineness of the monofilament is 4 to 30 denier, and the number of monofilaments is preferably composed of 100 to 600 aggregates. If the fineness of the monofilament is less than 4 denier, the occurrence of the wool is serious, the quality of the yarn is poor and the strength is not sufficient enough, if it exceeds 30 denier, it is difficult to cool the untwisted yarn, the elongation of the yarn is inferior. If the number of monofilament is less than 100, the strength is not sufficient as an industrial company, and if more than 600, it is difficult to uniformly cool un-twisted yarn.
  • the fineness of the polyethylene terephthalate multifilament is preferably 400 denier to 30,000 denier. If the fineness of the multifilament is less than 400 denier, the strength is not sufficient as an industrial company, and if the fineness of the multifilament exceeds 30,000 denier, the uniform cooling of the non-twisted yarn is difficult and the elongation is poor.
  • Figure 2 is a force-strain curve for multifilaments of polyethylene multifilaments of the present invention and conventional 1000D polyethylene terephthalate filaments.
  • the polyethylene terephthalate monofilament passes through the hood heater 4, it creates an atmosphere in the hood so that it can have an amorphous and unoriented structure as much as possible. And rapidly cooling the amorphous, non-orientated yarn thus formed in the cooling zones 5 and 6 to maintain the amorphous, non-orientated state as much as possible to enable work with a high draw ratio.
  • Polyethylene terephthalate monofilament produced through such a process is composed of 100 to 400 aggregates of polyethylene terephthalate multifilament is good in terms of appearance and fin yarns because of the good spinning workability, the strength of the multifilament is 11.0 g / d Modulus is 120 ⁇ 140g / d, toughness of 37 to 40 or less can be widely used as industrial polyester fibers useful for industrial ropes, civil reinforcement, webbing, seat belts and the like.
  • Example does not limit the scope of the present invention.
  • the sample 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.
  • the speed of the high speed roller 1 (8) was calculated by dividing the speed of the polyethylene terephthalate polymer directly under the nozzle.
  • the value obtained by dividing the speed of the high roller 4 (11) by the speed of the high roller 1 (8) was defined as the draw ratio.
  • Polyetherene terephthalate chip having an intrinsic viscosity of 1.00 is melted through an extruder, filtered using a 30 ⁇ m nonwoven fabric or a 400 mesh metal filter using a pack filter, and then filtered.
  • Example 1 Example 2
  • Example 3 Example 4
  • Example 5 Example 6
  • Example 7 Total draw ratio 6.3 6.4 6.5 6.3 6.3 6.3 6.3 6.3
  • Hood heater length 600 600 600 600 600 600
  • Hood heater temperature (°C) 360 360 360
  • 360 360
  • 360 360 Draft 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 Toughness 38.5 38.0 38.0 39.1 38.4 38.3 38.5
  • Yarn Strength (g / d) 11.1 11.2 11.3 11.1 11.0 11.0 11.1 Body (%) 12.0 11.5 11.3 12.4 12.2
  • the main conditions are the same as the above embodiment, and the draft is 93.
  • the main conditions are the same as those of Comparative Example 1, and the intake air displacement of the cooling air pressure is 100/110 mmAq.
  • the main conditions were the same as in Comparative Example 1, and the filter inside the pack was filtered to 100 mesh.
  • the main conditions are the same as those of Comparative Example 1, and the lengths of the hood heaters are 200, 400, and 600 mm.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

The present invention relates to a polyethylene terephthalate multifilament having a strength of 11.0 g/d or higher and a toughness of 38 or higher, wherein said polyethylene terephthalate multifilament is produced by melt spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2. The polyethylene terephthalate textile produced in accordance with the present invention has a high modulus, high strength, low elongation and extremely low permanent deformation, and therefore can be used in geogrids, industrial weaving, seatbelts, and the like.

Description

산업용 폴리에틸렌테레프탈레이트 멀티 필라멘트Industrial Polyethylene Terephthalate Multifilament
본 발명은 강도 11.0g/d 이상이고 터프니스가 38 이상인 힘-변형 곡선을 갖는 폴리에틸렌테레프탈레이트 멀티 필라멘트 섬유에 관한 것이다. 본 발명에 따른 멀티 필라멘트 섬유는 고강도, 높은 모듈러스 및 저신율의 특성을 지녀 산업용 로프, 토목용 보강재, 웨빙용 또는 시트벨트의 소재로 사용되는 산업용 고강력 폴리에스테르 섬유의 제조에 적용될 수 있다.The present invention relates to polyethylene terephthalate multifilament fibers having a force-strain curve having a strength of at least 11.0 g / d and a toughness of at least 38. The multifilament fibers according to the present invention have high strength, high modulus and low elongation and can be applied to the production of industrial high strength polyester fibers used as materials for industrial ropes, civil reinforcement, webbing or seat belts.
종래에는 산업용으로 사용되는 폴리에스테르 섬유의 강도를 높이기 위하여 고유점도 1.0 이상의 고점도 칩을 용융한 후 용융된 폴리머 온도를 300℃까지 충분히 높여서 녹인후 고화시키고 고뎃 롤러에서 저속권취하여 얻은 미연신사를 1단 및 2단으로 연신배율 6.0까지 직접 연신한 후 릴랙스를 시켜 권취하는 방법을 사용하였다. 이 때 저속 권취로 미연신사의 배향도를 낮추고 고배율의 연신을 부여하여 고강도의 특성을 얻었다. 이러한 종래 방법으로 제조한 폴리에스테르 사는 강도 10.5g/d 이하, 절신 11 ~ 15%의 특성을 가진다.Conventionally, in order to increase the strength of polyester fibers used for industrial purposes, after melting a high viscosity chip having an intrinsic viscosity of 1.0 or more, the melted polymer is sufficiently heated to 300 ° C to melt and solidify, and the low-stretched yarn obtained by winding at a low speed with a high speed roller is subjected to one step. And stretching directly to draw ratio 6.0 in two stages, followed by relaxation and winding. At this time, the orientation of the undrawn yarn was lowered by a low-speed winding, and a high magnification was applied to obtain high strength properties. The polyester yarn produced by such a conventional method has a strength of 10.5 g / d or less and a length of 11 to 15%.
종래의 방사 기술을 이용하여 더 높은 강도의 섬유를 얻기 위하여 연신 배율을 높일 경우 방사 사절이 많이 발생하게 되고, 핀사가 많이 발생하여 후 공정성이 나빠진다. 그러므로 제조 비용의 상승 및 제품의 질이 저하되어 기존의 기술로는 고강력사를 제조하기 힘들다. When using a conventional spinning technique to increase the draw ratio in order to obtain a fiber of higher strength, a lot of spinning thread is generated, a lot of pin yarn occurs, the post-processability is worse. Therefore, it is difficult to manufacture high-strength yarns using existing technologies due to the increase in manufacturing cost and the deterioration of product quality.
본 발명에 따른 섬유는 연신 배율을 높일 수 있도록 노즐 직하의 폴리에틸렌 테레프탈레이트 폴리머 속도와 고뎃드 롤러 1번의 속도를 조절하여 종래의 동일 연신 배율에서 고강도 폴리에틸렌테레프탈레이트의 생산이 가능하도록 하는 방법에 따라 제조된다.The fiber according to the present invention is manufactured according to a method for producing high-strength polyethylene terephthalate at the same draw ratio by adjusting the speed of the polyethylene terephthalate polymer directly under the nozzle and the speed of the high roller 1 so as to increase the draw ratio. do.
본 발명은 고유점도가 0.8∼1.2인 폴리에틸렌테레프탈레이트 칩을 방사하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법으로서, 익스투르더 내의 폴리에틸렌테레프탈레이트의 온도가 290 ~ 305℃이고, 기어펌프를 통과하는 폴리에틸렌테레프탈레이트의 온도가 295 ~ 310℃이며, 방사 구금의 노즐 홀의 직경이 0.4 ~ 0.6mm이고, 방사 구금의 홀 길이와 홀 직경의 비율(L/D)이 2 내지 4이며, 방사 드래프트가 60 내지 70이고, 후드 히터의 길이가 400 ~ 600mm이며, 후드 히터의 온도가 360 ~ 390℃이고, 급속 냉각 챔버의 급기량은 20 ~ 70mmAq이며, 배기량은 30 ~ 80mmAq인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법을 제공한다.The present invention is a method for producing a polyethylene terephthalate multifilament spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2, the temperature of the polyethylene terephthalate in the extender is 290 ~ 305 ℃, polyethylene tere through the gear pump The temperature of the phthalate is 295-310 degreeC, the diameter of the nozzle hole of a spinneret is 0.4-0.6mm, the ratio (L / D) of the hole length and hole diameter of a spinneret is 2-4, and the spinning draft is 60-70 , The length of the hood heater is 400 ~ 600mm, the temperature of the hood heater is 360 ~ 390 ℃, the air supply amount of the rapid cooling chamber is 20 ~ 70mmAq, the exhaust capacity is 30 ~ 80mmAq polyethylene terephthalate multifilament It provides a method of manufacturing.
본 발명은 폴리에스테르 칩 자체의 고유 물성을 최대한 유지시키고 방사 조건을 최적화하여 방사 작업성이 우수하고 고 배율의 연신으로 인하여 높은 모듈러스, 고강력, 저절신의 특성을 가진 산업용 로프, 토목용 보강재, 웨빙용, 시트벨트 용 등에 유용한 산업용 초강도 폴리에스테르 사를 제조할 수 있다.The present invention is to maintain the inherent properties of the polyester chip itself to the maximum and to optimize the spinning conditions, spinning workability and industrial rope, civil reinforcement material having a high modulus, high strength, low elongation due to the stretching of high magnification, Industrial super-strength polyester yarns useful for webbing, seat belts, and the like can be prepared.
도 1은 본 발명에 따른 폴리에틸렌테레프탈레이트 멀티 필라멘트의 제조공정을 개략적으로 도시한 것이다.Figure 1 schematically shows a manufacturing process of polyethylene terephthalate multifilament according to the present invention.
도 2는 본 발명과 종래의 1000D 폴리에틸렌테레프탈레이트 멀티 필라멘트의 모노 필라멘트에 대한 힘-변형 곡선이다.Figure 2 is a force-strain curve for monofilaments of the present invention and conventional 1000D polyethylene terephthalate multifilament.
본 발명의 적절한 실시 형태에 따르면, 고유점도가 0.8∼1.2인 폴리에틸렌테레프탈레이트 칩을 방사하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법에 있어서, 익스투르더(1) 내의 폴리에틸렌테레프탈레이트의 온도가 290 ~ 305℃이고, 기어펌프(2)를 통과하는 폴리에틸렌테레프탈레이트의 온도가 295 ~ 310℃이며, 방사 구금(3)의 노즐 홀의 직경이 0.4 ~ 0.6mm이고, 방사 구금(3)의 홀 길이와 홀 직경의 비율(L/D)이 2 내지 4이며, 방사 드래프트가 60 내지 70이고, 후드 히터(4)의 길이가 400 ~ 600mm이며, 후드 히터(4)의 온도가 360 ~ 390℃이고, 급속 냉각 챔버(5, 6)의 급기량이 20 ~ 70mmAq이며, 배기량이 30 ~ 80mmAq인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법을 제공한다.According to a preferred embodiment of the present invention, in the method for producing a polyethylene terephthalate multifilament spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2, the temperature of the polyethylene terephthalate in the extender 1 is 290 to 305. And the temperature of the polyethylene terephthalate passing through the gear pump 2 is 295 to 310 ° C, the diameter of the nozzle hole of the spinneret 3 is 0.4 to 0.6mm, and the hole length and hole diameter of the spinneret 3 The ratio L / D is 2 to 4, the radiation draft is 60 to 70, the length of the hood heater 4 is 400 to 600 mm, the temperature of the hood heater 4 is 360 to 390 ° C, and rapid cooling Provided is a method for producing polyethylene terephthalate multifilament, characterized in that the air supply amount of the chambers 5 and 6 is 20 to 70 mmAq and the exhaust amount is 30 to 80 mmAq.
본 발명의 다른 적절한 실시 형태에 따르면, 폴리에틸렌테레프탈레이트 멀티필라멘트의 강도가 11.0g/d 이상이며, 터프니스가 38이상인 폴리에틸렌테레프탈레이트 멀티 필라멘트을 제공한다According to another suitable embodiment of the present invention, a polyethylene terephthalate multifilament having a strength of 11.0 g / d or more and a toughness of 38 or more is provided.
본 발명의 또 다른 적절한 실시 형태에 따르면, 폴리에틸렌테레프탈레이트 멀티 필라멘트는 모노필라멘트의 섬도가 4 내지 30 데니어이고, 모노필라멘트가 개수가 100 개 내지 600개의 집합체로 이루어진다.According to another suitable embodiment of the present invention, the polyethylene terephthalate multifilament has a fineness of 4 to 30 denier of the monofilament, and the monofilament consists of 100 to 600 aggregates.
본 발명의 또 다른 적절한 실시 형태에 따르면, 폴리에틸렌테레프탈레이트 멀티 필라멘트의 섬도가 400 데니어 내지 30,000 데니어이다.According to another suitable embodiment of the present invention, the fineness of the polyethylene terephthalate multifilament is from 400 denier to 30,000 denier.
본 발명의 또 다른 적절한 실시 형태에 따르면, 고강력 폴리에틸렌테레프탈레이트 멀티필라멘트를 포함하는 산업용 로프, 토목용 보강재, 웨빙 및 시트벨트로 구성된 그룹으로부터 선택된 하나의 산업용 제품을 제공한다.According to another suitable embodiment of the present invention, there is provided one industrial product selected from the group consisting of industrial ropes, civil engineering reinforcements, webbing and seat belts comprising high strength polyethylene terephthalate multifilament.
이하에서 첨부된 도면을 참조하여 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 폴리에틸렌테레프탈레이트 멀티 필라멘트의 제조공정을 개략적으로 도시한 것이다.Figure 1 schematically shows a manufacturing process of polyethylene terephthalate multifilament according to the present invention.
고유점도가 0.8 ~ 1.2 범위의 폴리에스테르 칩을 익스투르더(1)의 온도 조건을 낮게 설정하여 용융한다. 이 때 용융된 폴리머의 온도를 290 ~ 305℃로 하였다. 폴리머의 온도가 290℃보다 낮으면 폴리머가 균일하게 녹지 않기 때문에 방사가 어렵고, 폴리머의 온도가 305℃보다 높으면 폴리머의 점도가 낮아지게 되어 고강도 발현에 어렵다. A polyester chip having an intrinsic viscosity in the range of 0.8 to 1.2 is melted by setting the temperature condition of the extender 1 low. At this time, the temperature of the molten polymer was set to 290 to 305 ° C. When the temperature of the polymer is lower than 290 ° C, spinning is difficult because the polymer is not uniformly melted. When the temperature of the polymer is higher than 305 ° C, the viscosity of the polymer is lowered and it is difficult to express high strength.
또한 기어펌프(2)는 보온을 위해 온도를 부여하는 데, 이때도 기어펌프(2)의 보온의 설정 온도를 낮게 하여 기어펌프(2)를 통과하는 폴리머의 온도가 295 ~ 310℃가 될 수 있도록 조정하였다. 폴리머의 온도가 295℃보다 낮으면 방사 작업성이 좋지 않으며, 폴리머의 온도가 310℃도보다 높으면 고온에 의한 열분해가 일어나게 되어 고강도의 특성을 잃게된다. In addition, the gear pump 2 provides a temperature for thermal insulation, and at this time, the temperature of the polymer passing through the gear pump 2 may be 295 to 310 ° C. by lowering the set temperature of the thermal insulation of the gear pump 2. To adjust. If the temperature of the polymer is lower than 295 ° C is not good spinning workability, if the temperature of the polymer is higher than 310 ° C thermal decomposition occurs by high temperature loses the properties of high strength.
방사 구금(3)의 노즐 홀의 직경을 0.4 ~ 0.6mmφ로 하였다. 노즐 홀의 직경이 0.4mmφ 미만이거나 0.6mmφ을 초과하는 경우에는 방사성이 좋지 못하였다. 방사 구금(3)의 홀 길이와 홀 직경의 비율(L/D)을 2 내지 4로 하였다. 방사 구금(3)의 홀길이와 홀 직경의 비율(L/D)을 2 미만으로 하면 방사성이 좋지 못하였고, 비율(L/D)이 4을 초과하면 팩압이 증가하여 방사성이 좋지 못하였다. The diameter of the nozzle hole of the spinneret 3 was 0.4-0.6 mmphi. When the diameter of the nozzle hole was less than 0.4 mmφ or exceeded 0.6 mmφ, the radioactivity was not good. The ratio (L / D) of the hole length and the hole diameter of the spinneret 3 was 2 to 4. When the ratio (L / D) of the hole length and hole diameter of the spinneret 3 was less than 2, the radioactivity was not good, and when the ratio (L / D) was more than 4, the pack pressure increased and the radioactivity was not good.
본 발명에서 방사 드래프트는 60 내지 70으로 유지하여 고뎃 롤러 상에서 높은 연신성을 부여 할 수 있도록 한다. 방사 드래프트가 60 미만인 경우에는 방사 팩압이 증가하여 방사성이 좋지 못하였고, 방사 드래프트가 70 초과인 경우에는 원사의 고강도가 발현되기 어려웠다. In the present invention, the spinning draft is maintained at 60 to 70 so as to impart high elongation on the roller roller. If the spinning draft was less than 60, the spinning pack pressure was increased, so that the radioactivity was not good. If the spinning draft was more than 70, it was difficult to express the high strength of the yarn.
본 발명에서 후드 히터(Hood Heater)(4)의 길이는 400 ~ 600mm인 것이 바람직하다. 후드 히터가 400mm 미만인 경우에는 방사성이 좋지 못하였고, 후드 히터가 600mm 초과인 경우에는 방사 급속 냉각 설비 부분에 영향을 주어 600mm 초과의 후드 히터 설치가 어렵다. 후드 히터(4)의 온도는 360 ~ 390℃로 높여 방사된 섬유로 하여금 최대한 무정 및 무배향의 구조를 가질 수 있도록 후드 내의 분위기를 만들어 주는 것이 바람직하다. 후드 히터의 온도가 360℃ 미만이면 방사성이 좋지 못하였고, 후드 히터의 온도가 390℃를 초과하면 히터에 과부하가 걸려 더 이상의 온도를 올리기가 어렵다. In the present invention, the length of the hood heater (Hood Heater) 4 is preferably 400 ~ 600mm. If the hood heater is less than 400mm, the radiation is not good, if the hood heater is more than 600mm it is difficult to install the hood heater more than 600mm because it affects the portion of the radiating rapid cooling equipment. The temperature of the hood heater 4 is preferably raised to 360 ~ 390 ℃ to create an atmosphere in the hood so that the spun fibers can have an amorphous and oriented structure as possible. If the temperature of the hood heater is less than 360 ℃ the radioactivity is not good, if the temperature of the hood heater exceeds 390 ℃ overheating the heater is difficult to raise any more temperature.
이렇게 형성된 무정, 무배향의 사는 공기를 이용하여 급속 냉각이 될 수 있도록 한다. 이때 급기량은 20 ~ 70mmAq(아쿠아)이 되게 하고 배기량은 30 ~ 80mmAq가 되도록 하였다. 급기량과 배기량이 각각 20mmAq 및 30mmAq 미만인 경우에는 폴리머가 균일하게 고화되지 않아 방사성이 좋지 않았고, 급기량과 배기량이 각각 70mmAq 및 80mmAq를 초과하는 경우 급속 냉각 부분에서 미연신사의 유동이 심해 방사성이 좋지 못하였다. The amorphous, non-orientated yarn thus formed can be rapidly cooled using air. At this time, the air supply amount was 20 to 70 mmAq (aqua) and the exhaust amount was 30 to 80 mmAq. If the air supply and the discharge were less than 20mmAq and 30mmAq, respectively, the polymer did not solidify uniformly, so that the radioactivity was not good. I couldn't.
상기 무정, 무배향 상태의 고화된 사는 적당량의 오일링(7)을 거친 후, 고뎃 롤러 4(11)와 고뎃롤러 5(12) 사이에서 릴랙스를 시킨 후 와인더(13)에 권취한다.After the solidified yarn in the amorphous, non-orientated state passes through an appropriate amount of oil ring 7, it relaxes between the roller roller 4 (11) and the roller roller 5 (12) and winds up the winder 13.
본 발명의 폴리에틸렌테레프탈레이트 멀티 필라멘트는, 모노필라멘트의 섬도는 4 내지 30 데니어이고, 모노필라멘트의 개수가 100 개 내지 600개의 집합체로 이루어지는 것이 바람직하다. 모노필라멘트의 섬도가 4 데니어 미만이면 모우 발생이 심각하여 사의 품질이 떨어지고 강력이 충분하지 못하고, 30 데니어를 초과하면 미연사의 냉각이 어려워 사의 연신성이 떨어진다. 모노필라멘트의 개수가 100개 미만이면 산업용사로서 강력이 충분하지 못하며, 600개를 초과하면 미연사의 균일한 냉각이 어려워진다.In the polyethylene terephthalate multifilament of the present invention, the fineness of the monofilament is 4 to 30 denier, and the number of monofilaments is preferably composed of 100 to 600 aggregates. If the fineness of the monofilament is less than 4 denier, the occurrence of the wool is serious, the quality of the yarn is poor and the strength is not sufficient enough, if it exceeds 30 denier, it is difficult to cool the untwisted yarn, the elongation of the yarn is inferior. If the number of monofilament is less than 100, the strength is not sufficient as an industrial company, and if more than 600, it is difficult to uniformly cool un-twisted yarn.
본 발명의 다른 적절한 실시 형태에 따르면, 폴리에틸렌테레프탈레이트 멀티 필라멘트의 섬도는 400 데니어 내지 30,000 데니어인 것이 바람직하다. 멀티필라멘트의 섬도가 400 데니어 미만이면 산업용사로서 강력이 충분하지 못하며, 30,000 데니어를 초과하면 미연사의 균일한 냉각이 어려워 연신성이 떨어진다.According to another suitable embodiment of the present invention, the fineness of the polyethylene terephthalate multifilament is preferably 400 denier to 30,000 denier. If the fineness of the multifilament is less than 400 denier, the strength is not sufficient as an industrial company, and if the fineness of the multifilament exceeds 30,000 denier, the uniform cooling of the non-twisted yarn is difficult and the elongation is poor.
도 2는 본 발명의 폴리에틸렌 멀티필라멘트와 종래의 1000D 폴리에틸렌테레프탈레이트 필라멘트의 멀티 필라멘트에 대한 힘-변형 곡선이다.Figure 2 is a force-strain curve for multifilaments of polyethylene multifilaments of the present invention and conventional 1000D polyethylene terephthalate filaments.
본 발명에 따르면, 상기 힘-변형 곡선의 형성하기 위하여, 폴리에틸렌테레프탈레이트 모노필라멘트가 후드 히터(Hood Heater)(4) 통과할 때, 최대한 무정 및 무배향의 구조를 가질 수 있도록 후드 내의 분위기를 만들어 주며, 이렇게 형성된 무정, 무배향의 사를 냉각구역(5, 6)에서 급속 냉각시켜 무정, 무배향상태를 최대한 유지시켜 높은 연신비로 작업을 가능하도록 하는 단계를 포함한다.According to the present invention, in order to form the force-strain curve, when the polyethylene terephthalate monofilament passes through the hood heater 4, it creates an atmosphere in the hood so that it can have an amorphous and unoriented structure as much as possible. And rapidly cooling the amorphous, non-orientated yarn thus formed in the cooling zones 5 and 6 to maintain the amorphous, non-orientated state as much as possible to enable work with a high draw ratio.
이와 같은 공정을 거쳐서 제조된 폴리에틸렌테레프탈레이트 모노필라멘트가 100 개 내지 400개의 집합체로 이루어진 폴리에틸렌테레프탈레이트 멀티 필라멘트는 방사 작업성이 좋아서 외관 및 핀사 면에서 유리하고, 멀티필라멘트의 강도가 11.0g/d 이고, 모듈러스가 120 ~ 140g/d 이며, 터프니스가 37 내지 40 이하이어서 산업용 로프, 토목용 보강재, 웨빙용, 시트벨트 용 등에 유용한 산업용 폴리에스테르 섬유로 널리 사용될 수 있다.Polyethylene terephthalate monofilament produced through such a process is composed of 100 to 400 aggregates of polyethylene terephthalate multifilament is good in terms of appearance and fin yarns because of the good spinning workability, the strength of the multifilament is 11.0 g / d Modulus is 120 ~ 140g / d, toughness of 37 to 40 or less can be widely used as industrial polyester fibers useful for industrial ropes, civil reinforcement, webbing, seat belts and the like.
아래에서 실시예 및 비교예를 들어서 본 발명을 상세하게 설명하지만, 실시예에 의해서 본 발명의 권리범위가 제한되는 것은 아니다.Although an Example and a comparative example are given to the following and this invention is demonstrated in detail, the Example does not limit the scope of the present invention.
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) 고유점도(I.V.)1) Intrinsic viscosity (I.V.)
페놀과 1,1,2,2-테트라클로로에탄올 6:4(무게비)로 혼합한 시약(90℃)에 시료 0.1g을 90분간 용해시킨 후 우베로데(Ubbelohde) 점도계에 옮겨 담아 30℃ 항온조에서 10분간 유지시키고, 용액의 낙하초수를 구한다. 솔벤트의 낙하초수도 상기와 같은 방법으로 구한 아래의 수학식에 의해 R.V.값 및 I.V. 값을 계산하였다.After dissolving 0.1 g of the sample in a reagent (90 ° C.) mixed with phenol and 1,1,2,2-tetrachloroethanol 6: 4 (weight ratio) for 90 minutes, transfer to a Ubbelohde viscometer and place it in a 30 ° C. thermostat. Hold for 10 minutes and find the number of seconds the solution is falling. The number of seconds of falling of the solvent can also be obtained by the following equations obtained from the above equations. The value was calculated.
R.V. = 시료의 낙하초수/솔벤트 낙하초수R.V. = Number of drops of solvent / number of drops of solvent
I.V. = 1/4 × (R.V.- 1/농도CO4) + 3/4 × (In R.V./농도)IV = 1/4 × (RV-1 / concentration CO 4 ) + 3/4 × (In RV / concentration)
2) 멀티필라멘트의 모듈러스와 강신도 측정방법 2) Measuring method of modulus and elongation of multifilament
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) 터프니스(Toughness, 10-1g/d))3) Toughness (10 -1 g / d)
Figure PCTKR2010003798-appb-I000001
을 이용하여 구한다.
Figure PCTKR2010003798-appb-I000001
Obtain it using
4) 드래프트 4) Draft
고뎃롤러 1(8)의 속도를 노즐직하의 폴리에틸렌테레프탈레이트 폴리머의 속도로 나눈 값으로 계산하였다. The speed of the high speed roller 1 (8) was calculated by dividing the speed of the polyethylene terephthalate polymer directly under the nozzle.
5) 연신비 5) elongation ratio
고뎃롤러 4(11)의 속도를 고뎃롤러 1(8)의 속도로 나눈 값을 연신비로 하였다. The value obtained by dividing the speed of the high roller 4 (11) by the speed of the high roller 1 (8) was defined as the draw ratio.
실시예 1 내지 7 Examples 1-7
고유점도 1.00의 폴리에텔렌테레프탈레이트 칩을 익스트루더(Extruder)를 통해 용융시키고, 팩필터(Pack Filter)로 30㎛ 부직포나, 400메쉬(mesh) 금속 필터(Filter)를 이용하여 필터링 한 후, 구멍수 192개인 노즐을 통해 용융 폴리머를 압출하고 600mm 의 길이를 갖는 후드히터를 360 ~ 380℃의 조건에서 통과 시킨후 15℃의 공기로 냉각시킨 다음 집속시켜 0.6 ~ 0.8% 원사내 오일함량을 유지하며 오일링하고 노즐직하와 GR 1(8)의 속도 비인 드래프트를 65로 고정하고, 고뎃 롤러를 통과해 다단으로 연신하고 표 1의 방사 조건으로 권취하였다.Polyetherene terephthalate chip having an intrinsic viscosity of 1.00 is melted through an extruder, filtered using a 30 μm nonwoven fabric or a 400 mesh metal filter using a pack filter, and then filtered. Extrude the molten polymer through the nozzle with 192 holes, and pass the hood heater having a length of 600mm under the conditions of 360 ~ 380 ℃, cool it with 15 ℃ of air, and concentrate it to increase the oil content of 0.6 ~ 0.8% yarn. Oiling was carried out and the draft, which is a ratio of the speed of GR 1 (8) directly under the nozzle, was fixed at 65, stretched through the rollers in multiple stages, and wound up under the spinning conditions of Table 1.
표 1
구 분 실시예 1 실시예 2 실시예 3 실시예 4 실시예 5 실시예 6 실시예 7
총연신비 6.3 6.4 6.5 6.3 6.3 6.3 6.3
냉각 공기압흡기/배기(mmAq) 20/30 20/30 20/30 60/70 20/30 20/30 20/30
필터 규격 부직포(30㎛) 부직포(30㎛) 부직포(30㎛) 부직포(30㎛) 부직포(30㎛) 400메쉬금속필터 부직포(30㎛)
원사내 오일함량(%) 0.6 0.6 0.6 0.6 0.6 0.6 0.8
후드히터길이(mm) 600 600 600 600 600 600 600
후드히터온도(℃) 360 360 360 360 380 360 360
드래프트 65 65 65 65 65 65 65
터프니스 38.5 38.0 38.0 39.1 38.4 38.3 38.5
원사강도(g/d) 11.1 11.2 11.3 11.1 11.0 11.0 11.1
절신(%) 12.0 11.5 11.3 12.4 12.2 12.1 12.0
Table 1
division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7
Total draw ratio 6.3 6.4 6.5 6.3 6.3 6.3 6.3
Cooling Air Intake / Exhaust (mmAq) 20/30 20/30 20/30 60/70 20/30 20/30 20/30
Filter specifications Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) 400 Mesh Metal Filter Nonwoven Fabric (30㎛)
Oil content in yarn (%) 0.6 0.6 0.6 0.6 0.6 0.6 0.8
Hood heater length (mm) 600 600 600 600 600 600 600
Hood heater temperature (℃) 360 360 360 360 380 360 360
Draft 65 65 65 65 65 65 65
Toughness 38.5 38.0 38.0 39.1 38.4 38.3 38.5
Yarn Strength (g / d) 11.1 11.2 11.3 11.1 11.0 11.0 11.1
Body (%) 12.0 11.5 11.3 12.4 12.2 12.1 12.0
[비교예 1]Comparative Example 1
상기 실시예와 주요한 조건은 같으며 드래프트가 93 이다.The main conditions are the same as the above embodiment, and the draft is 93.
[비교예 2]Comparative Example 2
비교예 1과 주요한 조건은 같으며 냉각 공기압의 흡기 배기량이 100/ 110mmAq 이다.The main conditions are the same as those of Comparative Example 1, and the intake air displacement of the cooling air pressure is 100/110 mmAq.
[비교예 3]Comparative Example 3
비교예 1과 주요한 조건은 같으며 팩(Pack) 내부의 필터(Filter)를 100mesh 로 필터링하였다.The main conditions were the same as in Comparative Example 1, and the filter inside the pack was filtered to 100 mesh.
[비교예 4][Comparative Example 4]
비교예 1과 주요한 조건은 같으며 원사의 오일함량을 0.3%로 하였다.Main conditions were the same as in Comparative Example 1, and the oil content of the yarn was 0.3%.
[비교예 5][Comparative Example 5]
비교예 4와 주요한 조건은 같으며 드래프트가 65이다.Main conditions are the same as in Comparative Example 4, and the draft is 65.
[비교예 6, 7, 8][Comparative Examples 6, 7, 8]
비교예 1과 주요한 조건은 같으며 후드히터의 길이가 200, 400, 600mm 이다.The main conditions are the same as those of Comparative Example 1, and the lengths of the hood heaters are 200, 400, and 600 mm.
표 2
구 분 비교예1 비교예2 비교예3 비교예4 비교예5 비교예6 비교예7 비교예 8
총연신비 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3
냉각공기압흡기/배기(mmAq) 20/30 100/110 20/30 20/30 20/30 20/30 20/30 20/30
필터 규격 부직포(30㎛) 부직포(30㎛) 100메쉬금속필터 부직포(30㎛) 부직포(30㎛) 부직포(30㎛) 부직포(30㎛) 부직포(30㎛)
원사내오일함량(%) 0.6 0.6 0.6 0.3 0.3 0.6 0.6 0.6
후드히터길이(mm) 600 600 600 600 600 200 400 600
후드히터온도(℃) 360 360 360 360 360 360 360 320
드래프트 93 93 93 93 65 93 93 93
터프니스 35.6 36.0 36.4 36.2 36.6 36.0 35.0 36.2
원사강도(g/d) 10.5 10.4 10.3 9.9 10.0 9.8 9.7 10.5
절신(%) 11.5 12.0 12.5 13.4 13.5 13.5 13.0 11.9
TABLE 2
division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8
Total draw ratio 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3
Cooling Air Intake / Exhaust (mmAq) 20/30 100/110 20/30 20/30 20/30 20/30 20/30 20/30
Filter specifications Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) 100 mesh metal filter Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛) Nonwoven Fabric (30㎛)
Oil content in yarn (%) 0.6 0.6 0.6 0.3 0.3 0.6 0.6 0.6
Hood heater length (mm) 600 600 600 600 600 200 400 600
Hood heater temperature (℃) 360 360 360 360 360 360 360 320
Draft 93 93 93 93 65 93 93 93
Toughness 35.6 36.0 36.4 36.2 36.6 36.0 35.0 36.2
Yarn Strength (g / d) 10.5 10.4 10.3 9.9 10.0 9.8 9.7 10.5
Body cut (%) 11.5 12.0 12.5 13.4 13.5 13.5 13.0 11.9

Claims (5)

  1. 고유점도가 0.8∼1.2인 폴리에틸렌테레프탈레이트 칩을 방사하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법에 있어서, In the method for producing a polyethylene terephthalate multifilament spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2,
    익스투르더(1)내의 폴리에틸렌테레프탈레이트의 온도가 290 ~ 305℃이고, 기어펌프(2)를 통과하는 폴리에틸렌테레프탈레이트의 온도가 295 ~ 310℃이며, 방사 구금(3)의 노즐 홀의 직경이 0.4 ~ 0.6mm이고, 방사 구금(3)의 홀 길이와 홀 직경의 비율(L/D)이 2 내지 4이며, 방사 드래프트가 60 내지 70이고, 후드 히터(4)의 길이가 400 ~ 600mm이며, 후드 히터(4)의 온도가 360 ~ 390℃이고, 급속 냉각 챔버(5, 6)의 급기량은 20 ~ 70mmAq이며, 배기량은 30 ~ 80mmAq인 것을 특징으로 하는 폴리에틸렌테레프탈레이트 멀티필라멘트의 제조방법.The temperature of the polyethylene terephthalate in the extruder 1 is 290 to 305 ° C, the temperature of the polyethylene terephthalate passing through the gear pump 2 is 295 to 310 ° C, and the diameter of the nozzle hole of the spinneret 3 is 0.4. ~ 0.6mm, the ratio (L / D) of the hole length and the hole diameter of the spinneret 3 is 2 to 4, the radial draft is 60 to 70, the length of the hood heater 4 is 400 to 600mm, The temperature of the hood heater (4) is 360 ~ 390 ℃, the air supply amount of the rapid cooling chamber (5, 6) is 20 ~ 70mmAq, the exhaust amount is 30 ~ 80mmAq The manufacturing method of polyethylene terephthalate multifilament.
  2. 고유점도가 0.8∼1.2인 폴리에틸렌테레프탈레이트 칩을 방사하여 얻은 폴리에틸렌테레프탈레이트 멀티필라멘트에 있어서, In the polyethylene terephthalate multifilament obtained by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.2,
    상기 폴리에틸렌테레프탈레이트 멀티필라멘트의 강도가 11.0g/d 이상이며, 터프니스가 38이상인 폴리에틸렌테레프탈레이트 멀티 필라멘트.Polyethylene terephthalate multifilament of the polyethylene terephthalate multifilament is more than 11.0g / d, toughness of 38 or more.
  3. 제 2 항에 있어서 The method of claim 2
    폴리에틸렌테레프탈레이트 멀티 필라멘트는 모노필라멘트의 섬도가 4 내지 30 데니어이고, 모노필라멘트가 개수가 100 개 내지 600개의 집합체로 이루어진 폴리에틸렌테레프탈레이트 멀티 필라멘트.Polyethylene terephthalate multi-filament is a polyethylene terephthalate multi-filament of the monofilament has a fineness of 4 to 30 denier, the monofilament is composed of 100 to 600 aggregates.
  4. 제 3 항에 있어서 The method of claim 3
    폴리에틸렌테레프탈레이트 멀티 필라멘트의 섬도가 400 데니어 내지 30,000 데니어인 폴리에틸렌테레프탈레이트 멀티 필라멘트.Polyethylene terephthalate multifilament having a fineness of 400 to 30,000 deniers of polyethylene terephthalate multifilament.
  5. 제 2항의 고강력 폴리에틸렌테레프탈레이트 멀티필라멘트를 포함하는 산업용 로프, 토목용 보강재, 웨빙 및 시트벨트로 구성된 그룹으로부터 선택된 하나의 산업용 제품.An industrial product selected from the group consisting of industrial ropes, civil engineering reinforcements, webbing and seat belts comprising the high strength polyethylene terephthalate multifilament of claim 2.
PCT/KR2010/003798 2009-07-02 2010-06-14 Industrial polyethylene terephthalate multifilament WO2011002165A2 (en)

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CN108588866A (en) * 2018-05-10 2018-09-28 无锡索力得科技发展有限公司 A kind of production method of ocean hawser polyester industrial yarn
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CN108691018A (en) * 2018-06-13 2018-10-23 无锡索力得科技发展有限公司 A kind of production method of safe automobile air bag polyester industrial yarn
CN108728921A (en) * 2018-06-13 2018-11-02 无锡索力得科技发展有限公司 A kind of production method of antimicrobial form polyester industrial yarn

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CN108588866A (en) * 2018-05-10 2018-09-28 无锡索力得科技发展有限公司 A kind of production method of ocean hawser polyester industrial yarn
CN108660536A (en) * 2018-05-10 2018-10-16 无锡索力得科技发展有限公司 A kind of production method of 12 spinning fine denier high intensity low shrinkage type polyester industrial yarns of high-quality
CN108677269A (en) * 2018-05-14 2018-10-19 无锡索力得科技发展有限公司 A kind of production method of high-quality flame-resistant terylene industrial yarn
CN108691018A (en) * 2018-06-13 2018-10-23 无锡索力得科技发展有限公司 A kind of production method of safe automobile air bag polyester industrial yarn
CN108728921A (en) * 2018-06-13 2018-11-02 无锡索力得科技发展有限公司 A kind of production method of antimicrobial form polyester industrial yarn

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