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Preparation method of oxidation-resistant PPS filter material and prepared modified PPS fiber

A technology of filter material and production method, applied in the chemical characteristics of fibers, melt spinning, stretch spinning, etc., can solve the problems of decreased performance of fiber products, uneven film formation on the surface of PPS fibers, and improved crystallinity, The effect of good thermal dimensional stability, good high temperature resistance and oxidant corrosion resistance

Pending Publication Date: 2022-04-26
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the existing PPS fiber or its products have uneven coating and film formation on the surface, which leads to the decline in the performance of fiber products.

Method used

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  • Preparation method of oxidation-resistant PPS filter material and prepared modified PPS fiber
  • Preparation method of oxidation-resistant PPS filter material and prepared modified PPS fiber
  • Preparation method of oxidation-resistant PPS filter material and prepared modified PPS fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of manufacture method of anti-oxidation PPS filter material, comprises the following steps:

[0030] (1) Preparation of modified PPS resin

[0031] According to the mass ratio of 1:9, polyphenylene sulfide resin slices and lignin are mixed, heated and melted, extruded and granulated, and dried to obtain a modified polyphenylene sulfide resin; the temperature of heating and melting is 200°C , the drying temperature is 70°C;

[0032] (2) Melt spinning

[0033] The modified polyphenylene sulfide resin prepared in step (1) is spun in a melt spinning machine, and passed through a screw extruder, a melt filter, a spinning box and components, wherein the modified polyphenylene sulfide resin is put into The temperature of zone 1-4 of the screw extruder for phenylene sulfide resin slices is 290°C / 305°C / 315°C / 315°C respectively to obtain a spinning melt. The spinneret is ejected, the temperature of the spinning box is 320°C, the ring blowing nitrogen is 325Pa, and the s...

Embodiment 2

[0037] The difference between this example and Example 1 is that the mass ratio of polyphenylene sulfide resin slices to lignin is 4:1. Other steps and processing parameter are identical with embodiment 1.

Embodiment 3

[0039] The difference between this example and Example 1 is that the mass ratio of polyphenylene sulfide resin slices to lignin is 7:3. Other steps and processing parameter are identical with embodiment 1.

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Abstract

The invention discloses a preparation method of an oxidation-resistant PPS filter material, which comprises the following steps: (1) heating and melting polyethylene terephthalate (PET) resin slices and polyacrylonitrile resin slices by a screw according to a mass ratio of (1: 1)-(1: 9), extruding, spinning, and carrying out two-component composite spinning; (2) directly carrying out dry-hot stretching on the spun silk; (3) preparing a needled felt; and (4) coating treatment. The preparation method of the bi-component fiber is adopted, PET resin serves as a skin layer, polyacrylonitrile resin serves as a core layer, the bi-component fiber is prepared through a melt spinning technology, the skin layer is made of PET, the core layer is made of polyacrylonitrile, and compared with a blended needled felt, the bi-component fiber needled felt has the advantages that in the film covering post-treatment stage, the film covering effect is good, and the film covering effect is good. And the PET of the skin layer is melted, so that the PET has good adhesion fastness with the PTFE film, and the problem of adhesion non-uniformity basically does not exist.

Description

technical field [0001] The invention relates to the technical field of filter material production, and more specifically relates to a method for making an oxidation-resistant PPS filter material and the prepared modified PPS fiber. Background technique [0002] The C—S bond energy on the polyphenylene sulfide (PPS) macromolecular chain is low, and it is easy to break and oxidatively cross-link under high temperature or strong oxidative environment conditions; therefore, the resistance of polyphenylene sulfide fibers to corrosive gases such as oxidants Poor resistance, especially in the face of high-temperature flue gas, when the temperature is higher than the continuous use temperature of the fiber, the basic structure and properties of the fiber will change, the fiber is easy to deform and the aging temperature will speed up the chemical reaction rate, not only acidic The corrosion reaction of the gas to the fiber is accelerated, and the high temperature will promote the hy...

Claims

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Application Information

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IPC IPC(8): D01F8/16D01F8/18D01D5/08D01D5/14
CPCD01F8/16D01F8/18D01D5/08D01D5/14
Inventor 严烁梁燕胡呈杰杨东聂孙建付素雅胡俊俊
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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