WO2017173887A1 - Device for accelerating coagulation bath process used in high-speed spinning of para-aramid fibers - Google Patents

Device for accelerating coagulation bath process used in high-speed spinning of para-aramid fibers Download PDF

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WO2017173887A1
WO2017173887A1 PCT/CN2017/073852 CN2017073852W WO2017173887A1 WO 2017173887 A1 WO2017173887 A1 WO 2017173887A1 CN 2017073852 W CN2017073852 W CN 2017073852W WO 2017173887 A1 WO2017173887 A1 WO 2017173887A1
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Prior art keywords
coagulation bath
para
spinning
funnel
aramid fibers
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PCT/CN2017/073852
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French (fr)
Chinese (zh)
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庹新林
崔庆海
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山东万圣博科技股份有限公司
清华大学
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Publication of WO2017173887A1 publication Critical patent/WO2017173887A1/en

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    • 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
    • D01D5/06—Wet spinning methods
    • 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
    • D01D11/00—Other features of manufacture
    • 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
    • D01D13/00—Complete machines for producing artificial threads
    • D01D13/02—Elements of machines in combination

Definitions

  • the invention belongs to the field of chemical fiber spinning, and particularly relates to a coagulation bath accelerating device for high-speed spinning of para-aramid fibers, and a high-speed spinning process matched therewith.
  • Para-aramid fiber is a high-performance material with high strength, high modulus, high temperature resistance, acid and alkali resistance and light weight. It has a wide range of applications in the defense and civilian sectors.
  • the para-aramid fiber is made by dissolving polyparaphenylene terephthalamide (PPTA) resin in concentrated sulfuric acid and dried by dry-jet spinning, due to PPTA.
  • PPTA polyparaphenylene terephthalamide
  • the resin has a problem of degradation in concentrated sulfuric acid, so once the PPTA spinning slurry is prepared, it is best to be spun into fibers in the shortest possible time. Therefore, high-speed spinning of the para-aramid fiber is achieved (spinning speed) >300m/min) not only can greatly improve production efficiency, reduce production costs, but also effectively maintain the quality and stability of the para-aramid fiber.
  • PPTA It is necessary to fix the orientation of the liquid crystal structure by dry-jet wet spinning to obtain fibers excellent in mechanical properties.
  • the orientation fixation is achieved by a coagulation bath. Therefore, the interaction of the coagulation bath with the fine stream of the slurry and the nascent fibers has a great influence on the properties of the final shaped fiber.
  • the coagulation bath should not only be able to extract the sulfuric acid in the tow to solidify the tow, but also avoid the impact on the tow and reduce the chance of breaking and filaments. Therefore, designing an effective coagulation bath device is essential for high speed spinning of para-aramid fibers.
  • the object of the present invention is to develop a new high-speed spinning method for para-aramid fiber, which not only effectively solves the para-aramid by the design of the new high-efficiency coagulation bath accelerating device and the use of the matching spinning process.
  • the problem of the influence of the coagulation bath on the fiber in the high-speed spinning of the fiber, and the stability of the production quality of the para-aramid fiber is improved, and the high-speed spinning of the para-aramid fiber is realized.
  • the invention relates to a coagulation bath accelerating device for high-speed spinning of para-aramid fibers, which mainly comprises the following parts:
  • the function of the grid is to adjust the flow state of the coagulation bath, and adjust the liquid level in the coagulation bath to a plane that does not fluctuate.
  • the grid is porous and has the same size as the inner diameter of the coagulation bath.
  • the mounting position and aperture of the grille are adjusted to the level of the solidification bath surface.
  • the draft tube is fixed through the grid at the bottom of the coagulation bath.
  • the draft tube and the grille may or may not be fixed, and the fixing is not preferred.
  • An injection system for injecting a coagulation bath liquid in a circular manner the injection system is fixedly connected to the draft tube at the end of the draft tube, and the injection system is a ring spray for further accelerating the coagulation bath in the draft tube.
  • the funnel in the device is characterized in that the taper of the funnel is adjustable in the range of 0-90 °; the height H from the water surface is 0-50 mm. Range and height adjustable, ie 0m m ⁇ H ⁇ 50mm;
  • the coagulation bath in the device is characterized by a solidification bath flow Q1 Adjustable, under the premise of ensuring the water surface is stable, the excess coagulation bath overflows from the surrounding; the grid device eliminates the turbulent flow of the coagulation bath water flow;
  • the injection system of the device is characterized in that the angle between the direction of the water jet and the tow is not more than 15 °, or spray directly parallel to the direction of the tow along the wall of the pipe.
  • the coagulation bath is injected by a centrifugal pump or other pump capable of pressurization, and the injection flow rate Q2 is controlled by a regulating valve;
  • the coagulation bath flow rates (Q1 and Q2) in the coagulation bath and spray system are such that the coagulation bath is full and the water level is stable.
  • the advantage of this device is that the height of the funnel is adjustable and can be applied to a wide range of spinning speeds (100-800m/min). ); by changing the taper of the funnel, it can be applied to spinnerets of different diameters. Small angles or jets along the wall ensure that the coagulation bath is accelerated rather than the opposite. High-speed spinning of para-aramid fibers can be achieved by using the device.
  • the spinning speed and the mechanical properties of the final fibers were evaluated under the same conditions.
  • the mechanical properties of the fiber are tested with a universal testing machine.
  • the test standard is GB/T 19975-2005. .
  • Figure 1 is a schematic structural view of the present invention
  • the PPTA resin having a logarithmic viscosity of 6.0 is dissolved, filtered, and defoamed into a spinning slurry.
  • the slurry concentration is 19.2% (mass ratio)
  • the spinning temperature is 85 °C
  • the spinning spinneret has a hole diameter of 0.07 mm
  • the spinning speed is 60 m/min
  • the air layer height is 10 mm
  • the spinning speed is 300 m/min.
  • the coagulation bath temperature was 5 °C and the concentration was 8%.
  • the height H of the coagulation bath acceleration device is 10mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 350L/h ; Q2 is sprayed vertically along the pipe wall;
  • the mechanical properties of the test fiber were tensile strength 2.9 GPa and tensile modulus 85 GPa.
  • the PPTA resin having a logarithmic viscosity of 6.5 is dissolved, filtered, and defoamed into a spinning slurry.
  • the slurry concentration is 19.8% (mass ratio)
  • spinning temperature is 90 °C; spinning spinneret hole diameter 0.063mm, spinning speed 80m/min, air layer height 10mm, spinning speed 450m/min
  • the coagulation bath temperature was 5 °C and the concentration was 8%.
  • the height H of the coagulation bath acceleration device is 15mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 500L/h. ; Q2 is sprayed at an angle of 5 °;
  • the mechanical properties of the tested fiber were tensile strength 3.1 GPa and tensile modulus 97 GPa.
  • the PPTA resin having a logarithmic viscosity of 4.0 is dissolved, filtered, and defoamed into a spinning slurry.
  • the slurry concentration is 20% (mass ratio), the spinning temperature is 85 °C; the spinning spinneret has a hole diameter of 0.07 mm, the spinning speed is 70 m/min, the air layer height is 10 mm, and the spinning speed is 400 m/min.
  • the coagulation bath temperature was 5 °C and the concentration was 8%.
  • the height H of the coagulation bath acceleration device is 5mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 400L/h ; Q2 is sprayed at an angle of 10 °;
  • the mechanical properties of the test fiber were tensile strength of 2.5 GPa and tensile modulus of 50 GPa.
  • the PPTA resin having a logarithmic viscosity of 5.3 is dissolved, filtered, and defoamed into a spinning slurry.
  • the slurry concentration is 19.5% (mass ratio)
  • the spinning temperature is 87 °C
  • the spinning spinneret has a hole diameter of 0.065 mm
  • the spinning speed is 100 m/min
  • the air layer height is 10 mm
  • the spinning speed is 500 m/min.
  • the coagulation bath temperature was 5 °C and the concentration was 8%.
  • the height H of the coagulation bath acceleration device is 5mm, the funnel surface diameter is 100mm, the height is 5mm; Q1 is 450L/h ; Q2 is sprayed vertically along the pipe wall;
  • the mechanical properties of the tested fiber were tensile strength 2.7 GPa and tensile modulus 70 GPa. .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)

Abstract

A device for accelerating a coagulation bath process used in high-speed spinning of para-aramid fibers. The device consists of three parts: a funnel (1) having an adjustable height, a coagulation bath (3) and a loop injection system (4). With the design of a high-performance device for accelerating coagulation bath processes, the issue of the effect of a coagulation bath on para-aramid fibers during high-speed spinning can be resolved and the quality of para-aramid fibers can be stabilized, enabling high-speed spinning of para-aramid fibers.

Description

一种用于对位芳纶纤维高速纺丝的凝固浴加速装置 Coagulation bath accelerating device for high speed spinning of para-aramid fiber 一种用于对位芳纶纤维高速纺丝的凝固浴加速装置 Coagulation bath accelerating device for high speed spinning of para-aramid fiber
技术领域 Technical field
本发明属化纤纺丝领域，特别涉及一种用于对位芳纶纤维高速纺丝的凝固浴加速装置，以及与之配套的高速纺丝工艺。 The invention belongs to the field of chemical fiber spinning, and particularly relates to a coagulation bath accelerating device for high-speed spinning of para-aramid fibers, and a high-speed spinning process matched therewith.
背景技术 Background technique
对位芳纶纤维是一种具有高强高模、耐高温、耐酸碱以及重量轻等优异性能的高性能材料 , 在国防和民用领域都有广泛的应用。对位芳纶纤维是聚对苯二甲酰对苯二胺（ PPTA ）树脂在浓硫酸中溶解后经过干喷湿纺制成，由于 PPTA 树脂在浓硫酸中会有降解的问题，所以 PPTA 的纺丝浆液一旦配制完成，最好能够在尽可能短的时间内纺制成纤维。因此，实现对位芳纶纤维的高速纺丝（纺速 >300m/min ）不仅可以大幅提高生产效率，降低生产成本，而且可以有效保持对位芳纶纤维的品质和稳定。 Para-aramid fiber is a high-performance material with high strength, high modulus, high temperature resistance, acid and alkali resistance and light weight. It has a wide range of applications in the defense and civilian sectors. The para-aramid fiber is made by dissolving polyparaphenylene terephthalamide (PPTA) resin in concentrated sulfuric acid and dried by dry-jet spinning, due to PPTA. The resin has a problem of degradation in concentrated sulfuric acid, so once the PPTA spinning slurry is prepared, it is best to be spun into fibers in the shortest possible time. Therefore, high-speed spinning of the para-aramid fiber is achieved (spinning speed) >300m/min) not only can greatly improve production efficiency, reduce production costs, but also effectively maintain the quality and stability of the para-aramid fiber.
众所周知， PPTA 需要通过干喷湿纺将其液晶结构取向固定，才能得到力学性能优异的纤维。其中取向固定是通过凝固浴来实现。因此，凝固浴与浆液细流及初生纤维的相互作用就对最终成型纤维性能有巨大影响。尤其对于高速纺丝来说，凝固浴不仅要能够将丝束中的硫酸萃取出去进而将丝束固化，而且要能够避免对丝束的冲击，降低产生断丝和毛丝的几率。因此，设计一种有效的凝固浴装置用于对位芳纶纤维的高速纺丝至关重要。为此，美国杜邦公司在专利 EP0934434B1 中设计了一种喷射式凝固浴加速器。通过将凝固浴液流强制加速来降低高速纺丝时凝固浴液体和丝束的速度差，进而降低凝固浴对丝束的冲击。韩国科隆公司在专利 2009145446A1 中设计了一种结构更简单的凝固浴加速器装置来实现对位芳纶纤维的高速纺丝。但是上述两种设计的凝固浴加速装置都有其缺点。杜邦公司设计的装置结构复杂，加工要求高，对于长期在稀酸环境中使用的装置来说，选材和加工是一个问题。而对于科隆公司设计的装置来说，结构过于简单，使用稳定性不佳。 As everyone knows, PPTA It is necessary to fix the orientation of the liquid crystal structure by dry-jet wet spinning to obtain fibers excellent in mechanical properties. The orientation fixation is achieved by a coagulation bath. Therefore, the interaction of the coagulation bath with the fine stream of the slurry and the nascent fibers has a great influence on the properties of the final shaped fiber. Especially for high-speed spinning, the coagulation bath should not only be able to extract the sulfuric acid in the tow to solidify the tow, but also avoid the impact on the tow and reduce the chance of breaking and filaments. Therefore, designing an effective coagulation bath device is essential for high speed spinning of para-aramid fibers. To this end, the US DuPont company patent EP0934434B1 A jet coagulation bath accelerator was designed. By forcibly accelerating the flow of the coagulation bath, the speed difference between the coagulation bath liquid and the tow at the time of high speed spinning is reduced, thereby reducing the impact of the coagulation bath on the tow. Korea Cologne company patent 2009145446A1 A simpler coagulation bath accelerator device is designed to achieve high speed spinning of para-aramid fibers. However, the coagulation bath accelerators of the above two designs have their disadvantages. The equipment designed by DuPont is complex in structure and requires high processing. For long-term use in a dilute acid environment, material selection and processing are a problem. For the device designed by Cologne, the structure is too simple and the stability of use is not good.
发明内容 Summary of the invention
本发明的目的是开发一种新的对位芳纶纤维高速纺丝方法，通过新的高效凝固浴加速装置的设计，以及与之配套的纺丝工艺的使用，不仅有效解决了对位芳纶纤维高速纺丝中凝固浴对纤维影响的问题，而且提高了对位芳纶纤维生产质量的稳定性，实现了对位芳纶纤维的高速纺丝。 The object of the present invention is to develop a new high-speed spinning method for para-aramid fiber, which not only effectively solves the para-aramid by the design of the new high-efficiency coagulation bath accelerating device and the use of the matching spinning process. The problem of the influence of the coagulation bath on the fiber in the high-speed spinning of the fiber, and the stability of the production quality of the para-aramid fiber is improved, and the high-speed spinning of the para-aramid fiber is realized.
一种用于对位芳纶纤维高速纺丝的凝固浴加速装置，主要包括以下部分： The invention relates to a coagulation bath accelerating device for high-speed spinning of para-aramid fibers, which mainly comprises the following parts:
（ 1 ）可调节高度的漏斗；漏斗设置在凝固浴槽内且底部与导流管顶端相连；漏斗和导流管以螺纹形式连接，通过旋转漏斗调节漏斗的高度； ( 1 a height-adjustable funnel; the funnel is disposed in the coagulation bath and the bottom is connected to the top end of the draft tube; the funnel and the draft tube are connected by a thread, and the height of the funnel is adjusted by a rotating funnel;
（ 2 ）带格栅的凝固浴槽；凝固浴槽没有形状限制，以圆形为优先。格栅的作用是调节凝固浴液流动状态，将凝固浴槽中液面调整为没有波动的平面。格栅为多孔盘状，大小与凝固浴槽内径一致。格栅安装位置及孔径以调整到凝固浴液面平稳为准。导流管穿过格栅在凝固浴槽底部固定。导流管与格栅可以固定也可以不固定，以不固定为优先。 ( 2 ) Coagulation bath with grid; the coagulation bath has no shape limitation, and the circle is preferred. The function of the grid is to adjust the flow state of the coagulation bath, and adjust the liquid level in the coagulation bath to a plane that does not fluctuate. The grid is porous and has the same size as the inner diameter of the coagulation bath. The mounting position and aperture of the grille are adjusted to the level of the solidification bath surface. The draft tube is fixed through the grid at the bottom of the coagulation bath. The draft tube and the grille may or may not be fixed, and the fixing is not preferred.
（ 3 ）以圆环方式喷射凝固浴液体的喷射系统；喷射系统在导流管端与导流管固定连接，喷射系统为圆环喷射，目的是将导流管中的凝固浴进一步加速。 (3 An injection system for injecting a coagulation bath liquid in a circular manner; the injection system is fixedly connected to the draft tube at the end of the draft tube, and the injection system is a ring spray for further accelerating the coagulation bath in the draft tube.
该装置中漏斗的特征在于漏斗锥度在 0-90 °范围可调；距水面高度 H 在 0-50mm 范围且高度可调，即 0m m ＜H≤50mm ； The funnel in the device is characterized in that the taper of the funnel is adjustable in the range of 0-90 °; the height H from the water surface is 0-50 mm. Range and height adjustable, ie 0m m <H≤50mm;
该装置中凝固浴槽的特征在于凝固浴流量 Q1 可调，在保证水面平稳的前提下，多余的凝固浴从四周溢出；格栅装置消除凝固浴水流的紊流； The coagulation bath in the device is characterized by a solidification bath flow Q1 Adjustable, under the premise of ensuring the water surface is stable, the excess coagulation bath overflows from the surrounding; the grid device eliminates the turbulent flow of the coagulation bath water flow;
该装置中喷射系统的特征在于水流喷射方向与丝束夹角不大于 15 °，或者直接沿管道壁与丝束方向平行喷射。凝固浴由离心泵或其他形式能够加压的泵喷射，喷射流量 Q2 由调节阀控制； The injection system of the device is characterized in that the angle between the direction of the water jet and the tow is not more than 15 °, or spray directly parallel to the direction of the tow along the wall of the pipe. The coagulation bath is injected by a centrifugal pump or other pump capable of pressurization, and the injection flow rate Q2 is controlled by a regulating valve;
凝固浴水槽和喷射系统中凝固浴液流量（ Q1 和 Q2 ）大小以保持凝固浴槽充满并水面平稳为准。 The coagulation bath flow rates (Q1 and Q2) in the coagulation bath and spray system are such that the coagulation bath is full and the water level is stable.
该装置的优点是漏斗高度可调，可适用于较宽的纺速范围（ 100-800m/min ）；通过改变漏斗的锥度，可以适用于不同面径的喷丝板。小角度或沿壁喷射可以确保对凝固浴起到加速作用而非相反。利用该装置可以实现对位芳纶纤维的高速纺丝。 The advantage of this device is that the height of the funnel is adjustable and can be applied to a wide range of spinning speeds (100-800m/min). ); by changing the taper of the funnel, it can be applied to spinnerets of different diameters. Small angles or jets along the wall ensure that the coagulation bath is accelerated rather than the opposite. High-speed spinning of para-aramid fibers can be achieved by using the device.
为了验证本发明装置的有效性，在相同条件下以纺速和最终纤维的力学性能做评价。纤维力学性能用万能力学试验机测试，测试标准为 GB/T 19975-2005 。 In order to verify the effectiveness of the apparatus of the present invention, the spinning speed and the mechanical properties of the final fibers were evaluated under the same conditions. The mechanical properties of the fiber are tested with a universal testing machine. The test standard is GB/T 19975-2005. .
附图说明 DRAWINGS
图 1 为本发明结构示意图； Figure 1 is a schematic structural view of the present invention;
图中， 1 、漏斗， 2 、格栅， 3 、凝固浴槽， 4 、喷射系统， 5 、导流管。 In the figure, 1, funnel, 2, grille, 3, coagulation bath, 4, injection system, 5, diversion tube.
具体实施方式 detailed description
下面通过实例对本发明进行进一步说明，但并不因此而限制本发明的内容。 The invention is further illustrated by the following examples, but does not limit the invention.
实施例 1 ： Example 1
比浓对数粘度为 6.0 的 PPTA 树脂经过溶解，过滤，脱泡成为纺丝浆液。浆液浓度为 19.2% （质量比），纺丝温度为 85 ℃；纺丝用喷丝板孔径 0.07mm ，喷丝速度 60m/min, 空气层高度 10mm ，纺丝速度为 300m/min ；凝固浴温度为 5 ℃，浓度 8% ； The PPTA resin having a logarithmic viscosity of 6.0 is dissolved, filtered, and defoamed into a spinning slurry. The slurry concentration is 19.2% (mass ratio), the spinning temperature is 85 °C; the spinning spinneret has a hole diameter of 0.07 mm, the spinning speed is 60 m/min, the air layer height is 10 mm, and the spinning speed is 300 m/min. The coagulation bath temperature was 5 °C and the concentration was 8%.
凝固浴加速装置中高度 H 为 10mm ，漏斗面径 100mm ，高度 8mm ； Q1 为 350L/h ； Q2 沿管道壁垂直喷射； The height H of the coagulation bath acceleration device is 10mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 350L/h ; Q2 is sprayed vertically along the pipe wall;
经过后续大量的水洗涤及烘干后，测试纤维力学性能为拉伸强度 2.9GPa ，拉伸模量 85GPa 。 After a large amount of water washing and drying, the mechanical properties of the test fiber were tensile strength 2.9 GPa and tensile modulus 85 GPa.
实施例 2 ： Example 2:
比浓对数粘度为 6.5 的 PPTA 树脂经过溶解，过滤，脱泡成为纺丝浆液。浆液浓度为 19.8% （质量比），纺丝温度为 90 ℃；纺丝用喷丝板孔径 0.063mm ，喷丝速度 80m/min, 空气层高度 10mm ，纺丝速度为 450m/min ；凝固浴温度为 5 ℃，浓度 8% ； The PPTA resin having a logarithmic viscosity of 6.5 is dissolved, filtered, and defoamed into a spinning slurry. The slurry concentration is 19.8% (mass ratio), spinning temperature is 90 °C; spinning spinneret hole diameter 0.063mm, spinning speed 80m/min, air layer height 10mm, spinning speed 450m/min The coagulation bath temperature was 5 °C and the concentration was 8%.
凝固浴加速装置中高度 H 为 15mm ，漏斗面径 100mm ，高度 8mm ； Q1 为 500L/h ； Q2 以 5 °角喷射； The height H of the coagulation bath acceleration device is 15mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 500L/h. ; Q2 is sprayed at an angle of 5 °;
经过后续大量的水洗涤及烘干后，测试纤维力学性能为拉伸强度 3.1GPa ，拉伸模量 97GPa 。 After a large amount of water washing and drying, the mechanical properties of the tested fiber were tensile strength 3.1 GPa and tensile modulus 97 GPa.
实施例 3 ： Example 3:
比浓对数粘度为 4.0 的 PPTA 树脂经过溶解，过滤，脱泡成为纺丝浆液。浆液浓度为 20% （质量比），纺丝温度为 85 ℃；纺丝用喷丝板孔径 0.07mm ，喷丝速度 70m/min, 空气层高度 10mm ，纺丝速度为 400m/min ；凝固浴温度为 5 ℃，浓度 8% ； The PPTA resin having a logarithmic viscosity of 4.0 is dissolved, filtered, and defoamed into a spinning slurry. The slurry concentration is 20% (mass ratio), the spinning temperature is 85 °C; the spinning spinneret has a hole diameter of 0.07 mm, the spinning speed is 70 m/min, the air layer height is 10 mm, and the spinning speed is 400 m/min. The coagulation bath temperature was 5 °C and the concentration was 8%.
凝固浴加速装置中高度 H 为 5mm ，漏斗面径 100mm ，高度 8mm ； Q1 为 400L/h ； Q2 以 10 °角喷射； The height H of the coagulation bath acceleration device is 5mm, the funnel surface diameter is 100mm, the height is 8mm; Q1 is 400L/h ; Q2 is sprayed at an angle of 10 °;
经过后续大量的水洗涤及烘干后，测试纤维力学性能为拉伸强度 2.5GPa ，拉伸模量 50GPa 。 After a large amount of water washing and drying, the mechanical properties of the test fiber were tensile strength of 2.5 GPa and tensile modulus of 50 GPa.
实施例 4 ： Example 4:
比浓对数粘度为 5.3 的 PPTA 树脂经过溶解，过滤，脱泡成为纺丝浆液。浆液浓度为 19.5% （质量比），纺丝温度为 87 ℃；纺丝用喷丝板孔径 0.065mm ，喷丝速度 100m/min, 空气层高度 10mm ，纺丝速度为 500m/min ；凝固浴温度为 5 ℃，浓度 8% ； The PPTA resin having a logarithmic viscosity of 5.3 is dissolved, filtered, and defoamed into a spinning slurry. The slurry concentration is 19.5% (mass ratio), the spinning temperature is 87 °C; the spinning spinneret has a hole diameter of 0.065 mm, the spinning speed is 100 m/min, the air layer height is 10 mm, and the spinning speed is 500 m/min. The coagulation bath temperature was 5 °C and the concentration was 8%.
凝固浴加速装置中高度 H 为 5mm ，漏斗面径 100mm ，高度 5mm ； Q1 为 450L/h ； Q2 沿管道壁垂直喷射； The height H of the coagulation bath acceleration device is 5mm, the funnel surface diameter is 100mm, the height is 5mm; Q1 is 450L/h ; Q2 is sprayed vertically along the pipe wall;
经过后续大量的水洗涤及烘干后，测试纤维力学性能为拉伸强度 2.7GPa ，拉伸模量 70 GPa 。 After a large amount of water washing and drying, the mechanical properties of the tested fiber were tensile strength 2.7 GPa and tensile modulus 70 GPa. .

Claims (1)

1 、一种用于对位芳纶纤维高速纺丝的凝固浴加速装置，主要包括以下部分：可调节高度的漏斗（ 1 ）；带格栅（ 2 ）的凝固浴槽（ 3 ）；以圆环方式喷射凝固浴液体的喷射系统（ 4 ）； 1. A coagulation bath accelerating device for high-speed spinning of para-aramid fibers, which mainly comprises the following parts: a height-adjustable funnel (1); with a grille (2) a coagulation bath (3); an injection system (4) that ejects the coagulation bath liquid in a circular manner;
漏斗（ 1 ）设置在凝固浴槽（ 3 ）内且底部与导流管（ 5 ）顶端相连；喷射系统（ 4 ）设置在导流管（ 5 ）下端The funnel (1) is disposed in the coagulation bath (3) and the bottom is connected to the top end of the draft tube (5); the injection system (4) is disposed in the draft tube (5) Lower end
该装置中漏斗（ 1 ）的特征在于漏斗锥度在 0-90 °范围可调；距水面高度 H 在 0-50mm 范围可调， 0m m ＜H≤50mm ；The funnel (1) in the device is characterized in that the funnel taper is adjustable in the range of 0-90 °; the height H from the water surface is adjustable in the range of 0-50 mm, 0 m m <H≤50mm;
该装置中凝固浴槽（ 3 ）的特征在于凝固浴流量可调，在保证水面平稳的前提下，多余的凝固浴从四周溢出；格栅（ 2 ）消除凝固浴水流的紊流；The coagulation bath (3) in the device is characterized in that the flow rate of the coagulation bath is adjustable, and the excess coagulation bath overflows from the periphery under the premise of ensuring a stable water surface; Eliminating the turbulent flow of the coagulation bath water flow;
该装置中喷射系统（ 4 ）的特征在于水流喷射方向与丝束夹角不大于 15 °，或者直接沿导流管（ 5 ）管道壁与丝束方向平行喷射；凝固浴由离心泵或其他形式能够加压的泵喷射，喷射流量由调节阀控制；The injection system (4) in the device is characterized in that the direction of the water jet is not more than 15 ° with the tow, or directly along the draft tube (5) The pipe wall is sprayed in parallel with the direction of the tow; the coagulation bath is injected by a centrifugal pump or other pump capable of pressurization, and the injection flow rate is controlled by a regulating valve;
凝固浴槽（ 3 ）和喷射系统（ 4 ）中凝固浴液流量大小以保持凝固浴槽（ 3 ）充满并水面平稳为准。 The flow rate of the coagulation bath in the coagulation bath (3) and the injection system (4) is such that the coagulation bath (3) is filled and the water level is stable.
PCT/CN2017/073852 2016-04-08 2017-02-17 Device for accelerating coagulation bath process used in high-speed spinning of para-aramid fibers WO2017173887A1 (en)

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