WO2020238687A1 - 一种高强型阻燃涤纶工业丝制备方法 - Google Patents

一种高强型阻燃涤纶工业丝制备方法 Download PDF

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WO2020238687A1
WO2020238687A1 PCT/CN2020/090920 CN2020090920W WO2020238687A1 WO 2020238687 A1 WO2020238687 A1 WO 2020238687A1 CN 2020090920 W CN2020090920 W CN 2020090920W WO 2020238687 A1 WO2020238687 A1 WO 2020238687A1
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flame
retardant
potassium
industrial yarn
spinning
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PCT/CN2020/090920
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English (en)
French (fr)
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葛骏敏
顾锋
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浙江海利得新材料股份有限公司
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Publication of WO2020238687A1 publication Critical patent/WO2020238687A1/zh

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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
    • D01D13/00—Complete machines for producing artificial threads
    • 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
    • D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
    • 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
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
    • D01F11/08—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters

Definitions

  • the invention belongs to the technical field of polymer fiber production, and particularly relates to a high-strength flame-retardant polyester industrial yarn and a preparation method thereof.
  • High-strength flame-retardant polyester industrial yarn is mainly used in safety belts, lifting belts, and conveyor belts. It requires high strength, good wear resistance and long-lasting flame retardancy.
  • the limiting oxygen index LOI of polyester is generally 20%-22%, which is a flammable material, and the potential danger caused by fire is becoming increasingly prominent.
  • the flame retardant modification of polyester at home and abroad is mainly based on phosphorus flame retardants as modifiers (mainly by copolymerization and adding CEPPA), and the phosphorus-containing groups of the phosphorus flame retardants are used to produce a large amount of
  • the heat of combustion melts the polyester, reduces the flow viscosity to produce melt dripping, takes away heat, and uses the free radical capture effect of the phosphorus-containing flame retardant to extinguish the flame to achieve the purpose of flame retardancy.
  • the flame retardant mechanism is the droplet taking away heat Flame retardant.
  • flame-retardant polyester industrial yarn is prepared by dip coating flame retardant and chip modification before spinning and winding.
  • the flame retardant is applied to the yarn before winding. Because it only contains the flame retardant on the surface of the yarn, the flame retardant is easily affected by high temperature, solvent, friction and other processes during the post-weaving and finishing process. Damage to the skid affects the flame retardant performance of the fabric, and the flame retardant performance decreases over time.
  • the flame retardant is a low-molecular substance.
  • the IV value of the chips can reach 1.0 ⁇ 1.2dl/g through the solid-phase thickening method, the crystallization temperature and melting point of the chips are higher than those of pure PET chips. Both must be low, and molecular pyrolysis is severe during spinning, which affects spinnability and tensile properties.
  • CEPPA method oxygen index (LOI) of 32% flame retardant polyester industrial yarn the highest strength is generally around 6.5cN/dtex, which is significantly lower than the existing high-strength non-flame retardant polyester industrial yarn, and the spinnability is also significantly worse For conventional slices.
  • Phosphorus-based flame retardants are the most effective environmentally friendly flame retardants for polyester.
  • the processing methods introduced by flame retardants can be mainly divided into copolymerization modification and blending modification process routes.
  • Copolymerization modification is to use a small molecule flame retardant with reactive functional groups to copolymerize with polyester monomers to introduce flame retardant groups into the polyester molecular chain.
  • the method has the advantages of more stable product quality, less addition of flame retardant, and more durable flame retardant effect.
  • the introduction of reactive phosphorus-based flame retardants will destroy the regularity of the polyester macromolecular chain structure, thereby affecting the crystallization and hydrolysis resistance of polyester fibers, and ultimately lead to the heat resistance, mechanical properties and aging resistance of the product Significant reduction in performance such as sex.
  • Blending modification is to melt and blend the flame retardant with polyester chips or melt, and then spin to obtain flame retardant fiber.
  • This method has better flexibility and diversity, but has the disadvantages of poor dispersibility of flame retardants in polyester, easy precipitation of flame retardants, poor flame retardant durability, and poor spinnability, which limits its use in polyester fibers. In the application.
  • the polyphosphate polymer selected in this patent has the characteristics of high phosphorus content and good compatibility with polyester, and overcomes the disadvantages of poor dispersion, easy precipitation, poor durability, and poor spinnability of the flame retardant in the blending modification method.
  • the prepared flame-retardant polyester industrial filament has the characteristics of high strength, good flame-retardant performance, and aging resistance.
  • the present invention proposes a high-strength flame-retardant polyester industrial yarn obtained by melt-spinning a chip blended with an ultra-high molecular phosphorus flame retardant and PET, which contains the following characteristics: high strength and halogen-free Environmental protection, good flame-retardant performance, and less spinning wool.
  • the fineness range of a high-strength flame-retardant polyester industrial yarn of the present invention includes: 250 dtex to 8000 dtex, and the thickness (fineness/number of holes) DPF of a single filament includes polyester industrial yarns of 2-20. Its breaking strength range: 6.5 ⁇ 8.5cN/dtex, breaking elongation range: 10.0 ⁇ 20.0%, dry heat shrinkage rate (177°C*10min*0.05cN/dtex): 6.0 ⁇ 10.0%, limiting oxygen index (LOI) ⁇ 32.0%.
  • Component A high molecular phosphorus flame retardant, the specific parameters are: molecular weight Phosphorus content: Tg; The high-molecular phosphorus flame retardant is formed by grafting one or more of copolyphosphonate carbonate, polyphosphonate, and copolyphosphonate to the molecular chain of PET; wherein the molecular weight Is the best
  • the intrinsic viscosity of fiber grade PET chips is: The mass content of COOH is The mass content of DEG is The mass ratio of component A to the mixed raw materials is Time is better
  • step (1) Solid phase thickening: the mixture material in step (1) is preheated in a continuous solid phase thickening device or drum to increase solid phase viscosity until the intrinsic viscosity of the mixed material after treatment is 1.0 ⁇ 1.20dl/g of high-viscosity PET flame-retardant chips; and, the mass content of raw material A accounts for 5%-10% of the mixed material, and the phosphorus content Of which phosphorus content Is the best
  • step (3) Melting process: The raw materials undergoing solid-phase polymerization in step (2) are heated and melted in the range of 265°C ⁇ 310°C under the protection of N 2 and then enter the spinning box. The temperature of the body is controlled at 265°C ⁇ 310°C;
  • Cooling and forming the spinning yarn jetted out through the spinneret is cooled into tow by the side blowing, and the temperature of the cooling air is controlled at 18-25°C;
  • Winding process control the winding speed Among them, the winding speed of 3200m/min is the best.
  • the spinning box is heated with biphenyl.
  • the tow is oiled, and the oiling agent is composed of monohydric alcohol fatty acid, polyhydric alcohol fatty acid, and organic phosphoric acid.
  • Salt, dimethylsiloxane or polysiloxane, potassium oleate, fatty acid composition, the mass ratio of each component is as follows:
  • the organic phosphates are: potassium methylene phosphonate, sodium methylene phosphonate, magnesium methylene phosphonate, potassium diphosphonate, potassium triphosphonate, potassium tetraphosphonate, potassium pentaphosphonate, diphosphine
  • composition of the oil agent and the mass ratio of each component are as follows:
  • the organic phosphate is one of potassium methylene phosphonate, potassium diphosphonate, and potassium pentaphosphonate.
  • the polymer flame retardant described in the flame-retardant chip used in the present invention is a polymer containing phosphorus element, which can undergo cross-linking reaction with the PET melt when it is melted at high temperature, so that it can be completely grafted in the PET molecule.
  • the melting point reaches 255°C, while the melting point of the existing CEPPA flame-retardant chips is only 238°C.
  • the thermal degradation rate of PET at high temperature is greatly reduced, and the resulting melt has good stretchability and heat resistance.
  • the spinning finish used in the present invention is used in the production of polyester industrial yarn spinning finish, has good friction resistance and cohesion, can greatly reduce the generation of wool in the stretching and post-weaving process, has high strength and no Halogen is environmentally friendly, with good flame retardant performance and less spinning wool.
  • Component A high molecular phosphorus flame retardant, the specific parameters are: molecular weight Phosphorus content: Tg;
  • the high-molecular phosphorus flame retardant is formed by grafting one or more of copolyphosphonate carbonate, polyphosphonate, and copolyphosphonate to the PET molecular chain;
  • the intrinsic viscosity of ordinary PET chips is:
  • the mixture material in step (1) is preheated in a continuous solid phase thickening device or a rotating drum for the fiber grade PET flame retardant chips with an intrinsic viscosity of 0.67dl/g to solidify Phase increase in viscosity until the intrinsic viscosity of the treated high-viscosity PET flame-retardant chips is 1.0-1.20dl/g; and the mass content of raw material A accounts for 5%-10% of the high-viscosity PET flame-retardant chips, and the phosphorus content
  • Cooling and forming the spinning yarn jetted through the spinneret is cooled by side blowing into a tow, and the temperature of the cooling air is controlled at 18-25°C;
  • Winding process control the winding speed
  • the speed control in the winding process directly affects the final performance of the product. Although this speed can be achieved, the causal relationship between the speed and the product performance needs to be understood by the technicians before the speed can be realized consciously.
  • the product made by this method has the following test results:
  • the tow is oiled, and the oiling agent is composed of monohydric alcohol fatty acid, polyhydric alcohol fatty acid, organic phosphate, dimethylsiloxane or polysiloxane , Potassium oleate, fatty acid composition, the mass ratio of each component is as follows:
  • Example 6 has the best overall performance.
  • the organic phosphates are: potassium methylene phosphonate, sodium methylene phosphonate, magnesium methylene phosphonate, potassium diphosphonate, potassium triphosphonate, potassium tetraphosphonate, potassium pentaphosphonate, diphosphine

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Artificial Filaments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

本发明涉及一种高分子纤维生产技术领域，特别是涉及一种高强型阻燃涤纶工业丝制备方法。本发明是通过先选取高分子磷系阻燃剂作为组分A，再将组分A与普通PET切片混合，A组份占混合后原料的质量比例为：5~10%:再将混合物料进行固相增粘，达到特性粘度为1.0～1.20dl/g；然后再在纺丝过程控制每个温度条件，直到卷绕速度的控制等，可得到高强型阻燃涤纶工业丝。本发明的优点是所生产的工业丝具有良好的耐摩擦性，抱合性，可以大大减少拉伸和后织造过程中毛丝的产生，强度高，无卤环保，阻燃性能好，纺丝毛丝少等特点。

Description

一种高强型阻燃涤纶工业丝制备方法 技术领域
本发明属于高分子纤维生产技术领域，特别是涉及一种高强型阻燃涤纶工业丝及其制备方法。
背景技术
高强型阻燃涤纶工业丝主要应用于安全带，吊装带，输送带，要求强度高，耐磨性好，阻燃性能持久。
涤纶的极限氧指数LOI一般为20％-22％，属于易燃材料，其发生火灾所带来的潜在危险也日益突出。目前国内外的涤纶阻燃改性主要是以磷系的阻燃剂作为改性剂(主要是共聚添加CEPPA为主)，利用磷系阻燃剂的含磷基团在燃烧过程中产生大量的燃烧热，使聚酯熔融，降低流动粘度产生熔融滴落，带走热量，并利用含磷阻燃剂的自由基捕捉作用熄灭火焰，达到阻燃目的，其阻燃机理为熔滴带走热量阻燃。一般有纺丝卷绕前浸涂阻燃剂和切片改性的方法来制备阻燃涤纶工业丝。
采用卷绕前纱线浸涂阻燃剂的方法，由于其只在纱线表面含有阻燃剂，在后织造，整理过程中由于受高温，溶剂，磨擦等过程的影响，阻燃剂易被损橇，影响了织物的阻燃性能，且阻燃性能随着时间推移而降低。
采用PET改性生产CEPPA磷系阻燃切片，其阻燃剂属于低分子物，虽然切片IV值通过固相增粘的方法达到1.0～1.2dl/g，但切片结晶温度和熔点比纯PET切片均要低，纺丝过程中分子热解严重，从而影响了可纺性和拉伸性能。当前应用CEPPA的方法氧指数(LOI)在32％的阻燃涤纶工业丝最高强度一般在6.5cN/dtex左右，明显低于现有高强非阻燃涤纶工业丝，且可纺性也要明显差于常规切片。
磷系阻燃剂是涤纶最有效的环保型阻燃剂，阻燃剂引入的加工方法主要可分为共聚改性和共混改性工艺路线。共聚改性是利用带反应性官能团的小分子阻燃剂与聚酯单体进行共聚反应，在聚酯分子链中引入阻燃基团。该方法具有产品质量更稳定、添加阻燃剂少、阻燃效果更耐久的优势。但反应性的磷系阻燃剂的引入，会破坏聚酯大分子链结构的规整型，从而影响聚酯纤维的结晶性能和耐水解性能等，最终导致产品耐热性能、力学性能和耐老化性等性能的显著降低。
共混改性是将阻燃剂与聚酯切片或熔体进行熔融共混，再经纺丝得到阻燃纤维。该方法具有更好的灵活性和多样性，但是具有阻燃剂在聚酯中的分散性差、阻燃剂易析出、阻燃耐久性差、可纺性差等劣势，从而限制了其在聚酯纤维中的应用。
本专利所选聚磷酸酯聚合物，具有磷含量高、与聚酯相容性好的特点，克服了共混改性方法阻燃剂分散性差、易析出、耐久性差、可纺性差等缺点，所制备的阻燃涤纶工业长丝具有强度高、阻燃性能好、耐老化等特点。
发明内容
本发明提出了一种使用超高分子磷系阻燃剂与PET共混的切片，经融熔纺丝得到的一种高强型阻燃涤纶工业丝，其包含的特点有；强度高，无卤环保，阻燃性能好，纺丝毛丝少等特点。
本发明所述的一种高强型阻燃涤纶工业丝纤度范围包括：250dtex～8000dtex，单根丝的粗细(纤度/孔数)DPF范围包括2～20的涤纶工业丝。其断裂强度范围：6.5～8.5cN/dtex，断裂伸长范围：10.0～20.0％，干热收缩率(177℃*10min*0.05cN/dtex)：6.0～10.0％，极限氧指数(LOI)≥32.0％。
本发明是通过下述技术方案得以实现的：
一种高强型阻燃涤纶工业丝的制备方法，其特征在于，包括下述步骤：
(1)原料选用
组分A：高分子磷系阻燃剂，具体参数为：分子量
Figure PCTCN2020090920-appb-000001
磷含量：
Figure PCTCN2020090920-appb-000002
Tg；
Figure PCTCN2020090920-appb-000003
所述高分子磷系阻燃剂是一种含有共聚膦酸酯碳酸酯，聚膦酸酯，共聚膦酸酯的一种或多种，枝接到PET分子链上所形成的；其中分子量
Figure PCTCN2020090920-appb-000004
为最佳；
将组分A与纤维级PET切片混合，A组份占混合后原料的质量比例为：
Figure PCTCN2020090920-appb-000005
其中纤维级PET切片的特性粘度为：
Figure PCTCN2020090920-appb-000006
COOH的质量含量为
Figure PCTCN2020090920-appb-000007
Figure PCTCN2020090920-appb-000008
DEG的质量含量为
Figure PCTCN2020090920-appb-000009
其中A组份占混合后原料的质量比例为
Figure PCTCN2020090920-appb-000010
时更好；
(2)固相增粘：将步骤(1)中的混合物料，在连续式固相增粘装置或转鼓中经过预热，固相增粘，直至混合物料经处理后的特性粘度为1.0～1.20dl/g的高粘PET阻燃切片；且，原料A占混合物料的质量含量5％～10％，磷含量
Figure PCTCN2020090920-appb-000011
Figure PCTCN2020090920-appb-000012
其中磷含量
Figure PCTCN2020090920-appb-000013
为最佳；
(3)融熔过程：将步骤(2)中经固相聚合的原料在N 2保护下，在265℃～310℃范围内对原料进行加热融熔，再进入纺丝箱体内，纺丝箱体的温度控制在265℃～310℃；
(4)计量纺丝过程：经充分融熔的熔体经过计量泵进行纺丝；
(5)冷却成型：经喷丝孔喷出的纺丝由侧吹风进行冷却成丝束，冷却风控制温度为18～25℃；
(6)拉伸过程：将冷却后的丝束进行拉伸和热定型，拉伸总倍率
Figure PCTCN2020090920-appb-000014
定型温度200℃～230℃；
(7)卷绕过程：控制卷绕速度
Figure PCTCN2020090920-appb-000015
其中，卷绕速度3200m/min为最佳。
作为优选，上述的一种高强型阻燃涤纶工业丝的制备方法的步骤(3)的融熔过程中，纺丝箱体用联苯加热。
作为优选，上述的一种高强型阻燃涤纶工业丝的制备方法的步骤(6)的拉伸过程前，对丝束进行上油，所述油剂由一元醇脂肪酸，多元醇脂肪酸，有机磷酸盐，二甲基硅氧烷或聚硅氧烷，油酸钾，脂肪酸组成，各组份的质量比例如下：
Figure PCTCN2020090920-appb-000016
其中的有机磷酸盐为：亚甲基膦酸钾、亚甲基膦酸钠、亚甲基膦酸镁，二膦酸钾、三膦酸钾、四膦酸钾、五膦酸钾，二膦酸钠、三膦酸钠、四膦酸钠、五膦酸钠，二膦酸镁、三膦酸镁、四膦酸镁、五膦酸镁中的一种或几种。
作为更佳选择，油剂的组成及各组份的质量比例如下：
Figure PCTCN2020090920-appb-000017
Figure PCTCN2020090920-appb-000018
其中的有机磷酸盐为：亚甲基膦酸钾、二膦酸钾、五膦酸钾中的一种。
本发明采用的阻燃切片中所述的高分子阻燃剂是一种含有磷元素的高分子，它高温熔融时能与PET熔体发生交联反应，使其完全嫁接在PET分子中，其熔点达到了255℃，而现有的CEPPA阻燃切片的熔点仅为238℃。使PET在高温时的热降解速率大幅下降，这使用所得的熔体具有良好可拉伸性和耐热性能。
有益效果：本发明采用的纺丝油剂于生产涤纶工业丝纺丝油剂，具有良好的耐摩擦性，抱合性，可以大大减少拉伸和后织造过程中毛丝的产生，强度高，无卤环保，阻燃性能好，纺丝毛丝少等特点。
具体实施方式
下面对本发明的实施作具体说明：
实施例1
首先确定原料：
组分A：高分子磷系阻燃剂，具体参数为：分子量
Figure PCTCN2020090920-appb-000019
磷含量：
Figure PCTCN2020090920-appb-000020
Tg；
Figure PCTCN2020090920-appb-000021
所述高分子磷系阻燃剂是一种含有共聚膦酸酯碳酸酯，聚膦酸酯，共聚膦酸酯的一种或多种，枝接到PET分子链上所形成的；
将组分A与普通PET切片混合，A组份占混合后原料的质量比例为：
Figure PCTCN2020090920-appb-000022
其中普通PET切片的特性粘度为：
Figure PCTCN2020090920-appb-000023
(2)固相增粘：将步骤(1)中的混合物料，对特性粘度为0.67dl/g的纤维级PET阻燃切片在连续式固相增粘装置或转鼓中经过预热，固相增粘，直至高粘PET阻燃切片经处理后的特性粘度为1.0～1.20dl/g；且，原料A占高粘PET阻燃切片的质量含量5％～10％，磷含量
Figure PCTCN2020090920-appb-000024
(3)融熔过程：将步骤(2)中经固相聚合的原料在N 2保护下，在280℃～310℃范围内对原料进行加热融熔，再进入纺丝箱体内，纺丝箱体的温度控制在
Figure PCTCN2020090920-appb-000025
Figure PCTCN2020090920-appb-000026
(4)计量纺丝过程：经充分融熔的熔体经过计量泵进行纺丝；
(5)冷却成型：经喷丝孔喷出的纺丝由侧吹风进行冷却成丝束，冷却风控制温度为18～25℃；
(6)拉伸过程：将冷却后的丝束进行拉伸和热定型，拉伸总倍率
Figure PCTCN2020090920-appb-000027
定型温度200℃～230℃；
(7)卷绕过程：控制卷绕速度
Figure PCTCN2020090920-appb-000028
卷绕过程中的速度控制直接影响到产品最后的性能，虽然这个速度可以实现，但对该速度与产品性能之间的因果关系需要技术人员的事先了解，才会有意识去实现该速度。
通过该方法所制得的产品，经检测的结果如下：
Figure PCTCN2020090920-appb-000029
从表中可以明显看出本发明生产的阻燃涤纶工业丝其强度明显高于使用CEPPA阻燃切片纺制的高强阻燃涤纶工业丝。
Figure PCTCN2020090920-appb-000030
实施例2-6
在实施例中，步骤(6)的拉伸过程前，对丝束进行上油，所述油剂由一元醇脂肪酸，多元醇脂肪酸，有机磷酸盐，二甲基硅氧烷或聚硅氧烷，油酸钾，脂肪酸组成，各组份的质量比例如下：
Figure PCTCN2020090920-appb-000031
上述实施例2——6经试验所得结果，与现有产品相比，具有更好的性能。其中实施例6的综合性能最佳。
其中的有机磷酸盐为：亚甲基膦酸钾、亚甲基膦酸钠、亚甲基膦酸镁，二膦酸钾、三膦酸钾、四膦酸钾、五膦酸钾，二膦酸钠、三膦酸钠、四膦酸钠、五膦酸钠，二膦酸镁、三膦酸镁、四膦酸镁、五膦酸镁中的一种或几种。

Claims (4)

  1. 一种高强型阻燃涤纶工业丝制备方法，其特征在于，包括下述步骤：
    (1)原料选用
    组分A：高分子磷系阻燃剂，具体参数为：分子量
    Figure PCTCN2020090920-appb-100001
    磷含量：
    Figure PCTCN2020090920-appb-100002
    Tg；
    Figure PCTCN2020090920-appb-100003
    所述高分子磷系阻燃剂是一种含有共聚膦酸酯碳酸酯，聚膦酸酯，共聚膦酸酯的一种或多种，枝接到PET分子链上所形成的；
    将组分A与纤维级PET切片混合，A组份占混合后原料的质量比例为：
    Figure PCTCN2020090920-appb-100004
    其中纤维级PET切片的特性粘度为：
    Figure PCTCN2020090920-appb-100005
    COOH的质量含量为
    Figure PCTCN2020090920-appb-100006
    Figure PCTCN2020090920-appb-100007
    DEG的质量含量为
    Figure PCTCN2020090920-appb-100008
    (2)固相增粘：将步骤(1)中的混合物料，在连续式固相增粘装置或转鼓中经过干燥预热，固相增粘，直至混合物料经处理后的特性粘度为1.0～1.20dl/g的高粘PET阻燃切片；磷含量
    Figure PCTCN2020090920-appb-100009
    (3)融熔过程：将步骤(2)中经固相聚合的原料在N 2保护下，在265℃～310℃范围内对原料进行加热融熔，再进入纺丝箱体内，纺丝箱体的温度控制在
    Figure PCTCN2020090920-appb-100010
    Figure PCTCN2020090920-appb-100011
    (4)计量纺丝过程：经充分融熔的熔体经过计量泵进行纺丝；
    (5)冷却成型：经喷丝孔喷出的纺丝由侧吹风进行冷却成丝束，冷却风控制温度为18～25℃；
    (6)拉伸过程：将冷却后的丝束进行拉伸和热定型，拉伸总倍率
    Figure PCTCN2020090920-appb-100012
    定型温度200℃～230℃；
    (7)卷绕过程：控制卷绕速度
    Figure PCTCN2020090920-appb-100013
  2. 根据权利要求1所述的一种高强型阻燃涤纶工业丝制备方法，其特征在于，步骤(3)的融熔过程中，纺丝箱体用联苯-联苯醚的混合液体加热。
  3. 根据权利要求1所述的一种高强型阻燃涤纶工业丝制备方法，其特征在于，步骤(6)的拉伸过程前，对丝束进行上油，所述油剂由一元醇脂肪酸，多元醇脂肪酸，有机磷酸盐，二甲基硅氧烷或聚硅氧烷，油酸钾，脂肪酸组成，各组份的质量比例如下：
    Figure PCTCN2020090920-appb-100014
    Figure PCTCN2020090920-appb-100015
    其中的有机磷酸盐为：亚甲基膦酸钾、亚甲基膦酸钠、亚甲基膦酸镁，二膦酸钾、三膦酸钾、四膦酸钾、五膦酸钾，二膦酸钠、三膦酸钠、四膦酸钠、五膦酸钠，二膦酸镁、三膦酸镁、四膦酸镁、五膦酸镁中的一种或几种。
  4. 根据权利要求3所述的一种高强型阻燃涤纶工业丝的制备方法，其特征在于，所述油剂的组成及各组份的质量比例如下：
    Figure PCTCN2020090920-appb-100016
    其中的有机磷酸盐为：亚甲基膦酸钾、二膦酸钾、五膦酸钾中的一种。
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