Tensile properties of PPS needle punched filter felts under heated condition
Tensile properties of two types of polyphenylene sulfide(PPS)needle punched filter felts with PPS scrim and polytetrafluoroethylene(PTFE)scrim at high temperature(90,130,170 and 190℃)were tested and compared with those at normal temperature.It was found that at high temperature,the warp and weft breaking strength of the two types of needle punched felts decreased to varying degrees.The weft breaking strength of the felt with PTFE scrim at 190℃was only 20%of that at normal temperature.And elongation under constant load for all the PPS needle punched felt samples increased with the increase of test temperature.
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