High temperature-resistant polyaryloxadiazole nonwoven filter material and preparation method thereof

Abstract

The invention relates to a high temperature-resistant polyaryloxadiazole nonwoven filter material and a preparation method thereof. The high temperature-resistant polyaryloxadiazole nonwoven filter material is prepared by blending 20-70wt% of a polyaryloxadiazole fiber with 30-80wt% of other heat resistant fibers. The polyaryloxadiazole fiber is added in the further blending of the original heat resistant fibers, so the filtering efficiency is guaranteed, and the continuous safe use performance of a filter felt in long-term high temperature environment is further improved. The filter felt and a filter bag made by adopting the filter material have higher cost performance than those made by adopting high temperature-resistant filter materials in the prior art.

Description

technical field [0001] The invention relates to a filter material and a preparation method thereof, in particular to a high-temperature resistant polyarylene oxadiazole non-woven filter material and a preparation method thereof. Background technique [0002] Heat-resistant fibers generally include polyphenylsulfone terephthalamide fibers, meta-aramid fibers, polytetrafluoroethylene fibers, polyimide fibers and polyphenylene sulfide fibers. [0003] Polyphenylsulfone terephthalamide fiber, referred to as PSA fiber, has similar properties to aramid fiber, but it is significantly better than aramid fiber in terms of flame resistance and thermal oxygen aging resistance. When heated in 300°C hot air for 100 hours, the loss of strength is less than 5%, the limiting oxygen index exceeds 33; it also has good dyeability, electrical insulation, chemical resistance, radiation resistance, etc. [0004] Meta-aramid fiber, also known as: aramid 1313 fiber, polyisophthalamide metaphenylen...

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Problems solved by technology

In its molecular structure, the volume of fluorine atoms is larger than that of hydrogen atoms, and the binding force of fluorine-carbon bonds is also strong, which plays a role in protecting the entire carbon-carbon main chain, making PTFE fibers have excellent chemical stability and excellent corrosion resistance. Compared with other synthetic fiber varieties; the surface of the fiber has a waxy feeling and a small friction coefficient; the actual use temperature is 120-180 ° C; it also has good weather resistance and flex resistance, but poor dyeing and thermal conductivity, and poor wear resistance Good, large coefficient of thermal expansion, easy to generate static electricity