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Preparation of polyphenyl thioether spinning melt

A technology of polyphenylene sulfide and polyphenylene sulfide resin, which is applied in the direction of melt spinning, single-component synthetic polymer rayon, textiles and papermaking, etc. Problems such as joints and raw materials cannot be used for spinning, etc., to achieve excellent textile processability, stable head pressure, and reduced residence time

Inactive Publication Date: 2011-04-06
自贡鸿鹤化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control the thermal oxidation process, and it is easy to cause oxidative crosslinking of polyphenylene sulfide, and even lead to the problem that the raw material cannot be used for spinning

Method used

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  • Preparation of polyphenyl thioether spinning melt
  • Preparation of polyphenyl thioether spinning melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put the polyphenylene sulfide resin with a melt index of 162g / 10min and transparent color in a vacuum oven, dry and pre-crystallize at a temperature of 105°C and a vacuum of -0.05Mpa for 3 hours, and then heat it at 160 ℃, vacuum degree -0.09Mpa to remove the resin adhesion solvent, etc. for 20 hours, using the shallow tank multi-temperature zone screw to melt and transport, the screw temperature is 310-330 ℃, the head pressure of the extruder is 10Mpa, and the output of the metering pump is 6.0cm 3 / min, the material stays in the equipment for 5 to 10 minutes to obtain a polyphenylene sulfide spinning melt, the viscosity of the melt is 960Pa·s, and the density is 1.2g / cm 3 .

[0028] After the melt is metered and filtered by a metering pump with a temperature of 340°C, it is sprayed out from a spinneret with a diameter of 0.3 mm and a number of holes of 36 holes. The spinning speed is 400 m / min. The cured filaments are oiled, bundled, wound and other processes to obta...

Embodiment 2

[0030]Put the polyphenylene sulfide resin with a melt index of 188g / 10min and an opaque color into a vacuum oven for drying and pre-crystallization at a temperature of 120°C and a vacuum of -0.09Mpa for 20 hours. The screw in the temperature zone is melted and conveyed, the screw temperature is 305-330°C, the head pressure of the extruder is 10Mpa, and the output of the metering pump is 6.0cm 3 / min, the material stays in the equipment for 5 to 10 minutes to obtain a polyphenylene sulfide spinning melt, the viscosity of the melt is 1060Pa·s, and the density is 1.18g / cm 3 .

[0031] After the melt is metered and filtered by a metering pump with a temperature of 335°C, it is sprayed out from a spinneret with a diameter of 0.3 mm and a number of holes of 36 holes. The spinning speed is 600 m / min. The cured filaments are oiled, bundled, wound and other processes to obtain nascent fibers. The as-spun fibers were stretched twice in a hot air bath at 95°C, then entered into a sizin...

Embodiment 3

[0033] Put the polyphenylene sulfide resin with a melt index of 206g / 10min and transparent color in a vacuum oven, and dry and pre-crystallize it at a temperature of 120°C and a vacuum of -0.09Mpa for 20 hours. The screw in the temperature zone is melted and conveyed, the screw temperature is 310-330°C, the head pressure of the extruder is 10Mpa, and the output of the metering pump is 6.0cm 3 / min, the material stays in the equipment for 5 to 10 minutes to obtain a polyphenylene sulfide spinning melt, the viscosity of the melt is 1350Pa·s, and the density is 1.2g / cm 3 .

[0034] After the melt is metered and filtered by a metering pump with a temperature of 330°C, it is sprayed out from a spinneret with a diameter of 0.3mm and a number of holes of 36 holes. The spinning speed is 800m / min, and the spinning fine stream is naturally cooled and solidified in the air. , The cured filaments are oiled, bundled, wound and other processes to obtain nascent fibers. After the as-spun f...

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Abstract

The invention discloses a method for preparing a polyphenylene sulfide spinning fused mass. The method comprises a pretreatment step and a fusing step, wherein the fusing step adopts a shallow-slot shortcut single screw extruder, thereby reducing the conveying capacity of polyphenylene sulfide inside a screw stem and ensuring more uniform heating of polyphenylene sulfide; when the shearing speed of polyphenylene sulfide resin is controlled within a range of between 150 and 400 S<-1>, apparent viscosity has less fluctuation; meanwhile, the residence time of the polyphenylene sulfide resin insidefusing equipment is reduced so as to reduce the possibility for the occurrence of thermal oxidation and thermal crosslinking; moreover, the viscosity of the fused mass is controlled to fluctuate within a small range so as to stabilize the pressure of an extruder head, thereby preventing the screw stem from being damaged due to acute increase in torque. The method can obtain a uniform and stable spinning fused mass, and a filament made by the fused mass has excellent mechanical property and textile processability.

Description

technical field [0001] The invention relates to a spinning process of polyphenylene sulfide, in particular to a preparation method of a spinning melt. Background technique [0002] Polyphenylene sulfide fiber is a high-tech fiber with excellent comprehensive properties. It is not only resistant to chemical corrosion (almost insoluble in any solvent below 200 ° C), high temperature resistance (long-term use temperature is 150-180 ° C), good flame retardancy (LOI >35), also has good physical and mechanical properties and excellent dimensional stability, PPS fiber products include staple fibers, filaments, hollow fibers, composite fibers, and fabrics, non-woven fabrics and felts processed by fiber textiles, etc. kinds of textiles. [0003] The main uses of polyphenylene sulfide fiber textile products are as follows: one is to use the fiber’s good thermal stability, high temperature resistance and chemical corrosion resistance for corrosive hot gas filter materials, such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01F6/76
Inventor 叶光斗唐国强徐建军蒋岳曾理康刘鹏清林雪梅李守群乔昌兵晏明彭金华游彦刘小慧姜猛进
Owner 自贡鸿鹤化工股份有限公司
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