This invention relates to a flame-resistant spun staple yarns and fabrics
and garments comprising these yarns and methods of making the same. The
yarns have 50 to 95 parts by weight of a polymeric staple fiber
containing a structure derived from a monomer selected from the group
consisting of 4,4'diaminodiphenyl sulfone, 3,3'diaminodiphenyl sulfone,
and mixtures thereof; and 5 to 50 parts by weight of a high modulus
staple fiber having a tensile modulus of 200 grams per denier (180 grams
per dtex) or greater or greater, based on 100 parts by weight of the
polymeric fiber and the high modulus fiber in the yarn.