To provide a polyester-based synthetic fiber having moisture-absorbing and releasing properties, providing excellent wear comfort, and having sufficient durability of the properties even against repeated laundry and repeated wear; and to provide a method for producing the polyester-based synthetic fiber fabric.
The polyester-based synthetic fiber having excellent moisture absorption is obtained by introducing a vinyl monomer to the surface of the polyester-based synthetic fiber by a graft polymerization. The surface graft rate calculated from the weight ratio is ≥5% and ≤25%, and at least a part of the terminal groups introduced by the graft polymerization is formed into a salt. The method for producing the polyester-based synthetic fiber fabric having the excellent moisture absorption comprises weaving or knitting the polyester-based fiber obtained by subjecting the fiber in a yarn state to the graft polymerization in the presence of a swelling agent to modify the fiber, dying the resultant fiber in a state of being formed into the fabric, and converting the terminal group of the dyed product into the salt.
OCHI SEIICHI
ISHIDA SEIJI
KAWABATA HIDEKI
