Polyester fiber having functionality imparted thereto, structure formed therefrom and method for producing the same

The present invention relates to the function of imparting a polyester fiber or constructed thereof, which comprises polyester fibers is 0.001 to 2% by weight of polyester fibers promote creep constructed or impart functional compounds and their manufacture the method, said compound having promoting creep promote creep coefficient (C) having 4 or more defined herein. According to the present invention can be obtained to impart excellent in durability functional polyester fibers or constructed thereof.