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A kind of preparation method of polyphenylene sulfide fiber

A polyphenylene sulfide fiber and fiber technology, applied in fiber treatment, fiber chemical characteristics, stretch spinning, etc., can solve the problem of poor mechanical properties of polyphenylene sulfide fiber, unfavorable linear molecular recrystallization, heat treatment temperature High-level problems, to achieve excellent comprehensive performance, suitable for post-processing and treatment, and good results

Active Publication Date: 2021-02-09
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the process of "one-step" drawing method, which is mainly used to produce polyphenylene sulfide filament fibers. The heat treatment temperature in the later stage is too high, which is not conducive to the recrystallization of linear molecules, which affects the related mechanical properties and Other properties will not have a good impact, and it can be seen that the properties of the final polyphenylene sulfide fiber product, especially the mechanical properties, are also poor
[0006] In the prior art, there are no specific requirements for the draft ratio of each step, but this process is an important node of fiber quality, and whether this node is handled well or not will directly affect the external shape of the fiber, tensile properties, fiber structure and Therefore, in order to improve the mechanical properties of polyphenylene sulfide fibers, and surpass imported polyphenylene sulfide fiber products in terms of comprehensive performance, and realize the desire to completely replace imported products in industry, it is necessary A more in-depth study of the draft ratio of the sulfide fiber processing step

Method used

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  • A kind of preparation method of polyphenylene sulfide fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of polyphenylene sulfide fiber, comprising the steps of:

[0040] (a) Raw material pretreatment

[0041] Select PPS slices with a melt index (MFR) of 220g / 10min, and place them in an electric blast drying oven for drying to reduce the moisture content of the PPS slices to below 50ppm. The drying temperature is 145°C and the drying time is 9h;

[0042] (b) spinning

[0043] Put the dried PPS chips into the screw extruder for spinning, and the spinning temperature is 310°C; firstly, the PPS chips are put into the barrel of the screw extruder, then they are transported and preheated in the feeding section, and then compressed compacted, exhausted and gradually melted in the metering section, then mixed and plasticized in the metering section, and quantitatively transported to the metering pump for spinning, the sprayed spinning is cooled and wound, and the primary fiber is obtained, wherein the draft ratio is 6. The drawing speed is 44m / min;

[0044...

Embodiment 2

[0049] A preparation method of polyphenylene sulfide fiber, comprising the steps of:

[0050] (a) Raw material pretreatment

[0051] Select PPS slices with a melt index (MFR) of 220g / 10min, and place them in an electric blast drying oven for drying to reduce the moisture content of the PPS slices to below 50ppm. The drying temperature is 145°C and the drying time is 9h;

[0052] (b) spinning

[0053] Put the dried PPS chips into the screw extruder for spinning, and the spinning temperature is 312°C; firstly, the PPS chips are put into the barrel of the screw extruder, then they are conveyed and preheated in the feeding section, and then compressed compacted, exhausted and gradually melted in the metering section, then mixed and plasticized in the metering section, and quantitatively transported to the metering pump for spinning, the sprayed spinning is cooled and wound, and the primary fiber is obtained, wherein the draft ratio is 8. The drawing speed is 52m / min;

[0054] (...

Embodiment 3

[0059] A preparation method of polyphenylene sulfide fiber, comprising the steps of:

[0060] (a) Raw material pretreatment

[0061] Select PPS slices with a melt index (MFR) of 220g / 10min, and place them in an electric blast drying oven for drying to reduce the moisture content of the PPS slices to below 50ppm. The drying temperature is 145°C and the drying time is 9h;

[0062] (b) spinning

[0063] Put the dried PPS slices into the screw extruder for spinning, and the spinning temperature is 314°C; firstly, the PPS slices are put into the barrel of the screw extruder, then they are transported and preheated in the feeding section, and then compressed compacted, exhausted and gradually melted in the metering section, then mixed and plasticized in the metering section, and quantitatively transported to the metering pump for spinning, the sprayed spinning is cooled and wound, and the primary fiber is obtained, wherein the draft ratio is 10. The drawing speed is 65m / min;

[0...

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Abstract

The invention discloses a preparation method of polyphenylene sulfide fiber, which relates to the technical field of processing special polymer materials. The method includes (a) raw material pretreatment, (b) spinning, (c) stretching, (d) heating Shaping step, step (b) spinning: put the pretreated PPS chips into the spinning equipment for spinning, and the sprayed spinning is cooled and wound to obtain primary fibers, wherein the draft ratio is 6-18 ; Step (c) stretching: the as-spun fiber is first preheated, then enters the heat tank for one stretch, and the stretch ratio is 0.6 to 0.85% of the draw ratio; then the fiber is stretched twice through the heat pipe, The second draw ratio is 0.1-0.4% of the draw ratio; step (d) heat setting: the stretched fiber is heat-set, and the heat-set ratio is 0.85-1.1% of the draw ratio, thereby obtaining polystyrene Finished sulfide fiber. The invention has simple process and strong applicability, and the prepared polyphenylene sulfide fiber has excellent comprehensive properties and can replace imported products, thereby solving the restriction of foreign products on domestic industry.

Description

technical field [0001] The invention relates to the technical field of processing special polymer materials, in particular to a preparation method of polyphenylene sulfide fibers. Background technique [0002] Polyphenylene sulfide (referred to as PPS), also known as polyphenylene sulfide, polyphenylene sulfide; is following polyamide, polyoxymethylene, polycarbonate, polyphenylene ether and polybutylene terephthalate The sixth largest engineering plastics. Polyphenylene sulfide is a white crystalline polymer. There are three types of products: linear, cross-linked and linear. It can be processed into plastic products by injection molding and extrusion molding. It can be made into film and spinning by bidirectional stretching. Fibers can also be made into composite materials by filling reinforcement. PPS is a rigid main chain formed by connecting a benzene ring to a sulfur atom at the para position. There are large π bonds in the structure, so the performance is extremely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/12D01D10/02D01D1/00D01F6/76
CPCD01D1/00D01D5/12D01D10/02D01F6/76
Inventor 罗云侯天武杨连智孙永贵
Owner YIBIN TIANYUAN GRP CO LTD
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