Polyphenylene Sulfide(PPS) Staple fiber its abbreviation is PPS.it is a new kind of high-performance heat shrinkable resin which has the features of high mechanical strength and temperature resistant,chemically and flame retardant,thermal stability,and excellent electrical properties. The staple fiber made of polyphenylene sulfide has good performance of high temperature resistant,acid and flame retardant.Tests prove that its fiber strength is more than 92% under the condition of 85℃,60% strong acid,and soaked in alkali solution more than 7 days.After being made to fabric,its normal using temperature is 190℃and the instantaneous temperature can reach to about 220℃.