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A PPS fiber modification process

A fiber modification and process technology, applied in the field of PPS fiber modification process, can solve problems such as poor oxidation resistance and inability to meet its requirements.

Inactive Publication Date: 2016-05-04
SUZHOU SHARTEL SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PPS fiber (polyphenylene sulfide) is a polymer that forms a rigid main chain of macromolecules by connecting sulfur atoms with benzene rings at the para-position. It has excellent strength, rigidity and fatigue resistance at high temperatures, and has good Excellent temperature resistance and corrosion resistance, usually filter bags made of this material will be used in power plants and other places, but the temperature resistance of this material is around 190 ° C, and its oxidation resistance is poor, extreme oxygen The index is about 8%, and it is easy to hydrolyze in the case of high oxygen content. With the development of the power generation industry, the requirements for filter felt are getting higher and higher. The performance of the existing filter bags can no longer meet its requirements. PPS fiber Both temperature resistance and oxidation resistance need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: first put PPS fiber in the pre-oxidation furnace, add oxidant, the content of oxygen in the oxidant is 10%, the pre-oxidation furnace starts to heat up, the time of heating up is 20min, the inside of the furnace is at normal pressure, the temperature in the furnace When the temperature in the furnace reaches 60°C, add a flame retardant, keep the temperature at this temperature for 20 minutes, then take out the modified PPS fiber, and test the temperature resistance and extreme oxygen index. The performance is 243°C and the extreme oxygen index is 23%.

Embodiment 2

[0018] Embodiment two: PPS fiber is put into the pre-oxidation furnace first, and oxidant is added, and the content of oxygen in the oxidant is 12%, and the pre-oxidation furnace starts to heat up, and the time of heating up is 40min, and the inside of the furnace is in a state of normal pressure, and the temperature in the furnace is Raise to 70°C, add flame retardant when the temperature in the furnace reaches 70°C, keep the temperature at this temperature for 40 minutes, then take out the modified PPS fiber, after the detection of temperature resistance and extreme oxygen index, its temperature resistance The performance is 276°C and the extreme oxygen index is 38%.

Embodiment 3

[0019] Embodiment three: first put PPS fiber in the pre-oxidation furnace, add oxidant, the content of oxygen in the oxidant is 15%, the pre-oxidation furnace starts to heat up, the time of heating up is 50min, the inside of the furnace is in normal pressure state, the temperature in the furnace Raise to 80°C, add flame retardant when the temperature in the furnace reaches 80°C, keep the temperature at this temperature for 50 minutes, then take out the modified PPS fiber, after the detection of temperature resistance and extreme oxygen index, its temperature resistance The performance is 302°C and the extreme oxygen index is 45%.

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Abstract

A PPS fiber modification process is disclosed. The process is characterized in that the process includes 1) a step of adding a PPS fiber material into a preoxidation furnace and adding an oxidant, 2) a step of heating under atmospheric pressure after the oxidant is added, with the heating time being 20-80 min and the temperature in the preoxidation furnace reaching a preset temperature between 60 DEG C and 100 DEG C, and 3) a step of adding a flame retardant after the temperature in the preoxidation furnace reaches the preset temperature to plastify PPS fibers, and the process achieves effects of improving temperature resistance and oxidation resistance of the PPS fibers.

Description

technical field [0001] The invention relates to a fiber processing technology, more specifically, it relates to a PPS fiber modification technology. Background technique [0002] In the production process of thermal power, steel, and cement industries, a large amount of dust will be generated, which will cause serious pollution to the atmosphere. Therefore, the state has set strict requirements on the air emissions of such enterprises, and bag dust removal is widely used. An ideal way to remove dust, the dust bag (filter bag) is called the heart of the bag filter and plays a very important role in the dust removal effect. Two important aspects that determine the quality of the dust bag are the quality of the dust cloth (dust removal material), such as high temperature resistance index, filtration accuracy, and air flow. On the other hand, the manufacturing process and quality of the bag are also important factors. In the prior art, PPS fibers are usually used as raw materia...

Claims

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Application Information

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IPC IPC(8): D06M11/34B01D46/02D06M101/30
CPCD06M11/34B01D46/023D06M2101/30D06M2200/30
Inventor 张永春
Owner SUZHOU SHARTEL SCI CO LTD