Normal pressure dyeable polyester fiber and method for producing the same

A method for producing a fiber comprising a polyester resin, wherein the polyester resin is a copolymer comprising:

• a dicarboxylic acid component comprising 80 mol % or more of a terephthalic acid component, 4.0 to 12.0 mol % of a cyclohexane dicarboxylic acid component, and 3.0 to 8.0 mol % of an adipic acid component;
• and a glycol component comprising, as a main component, an ethylene glycol component,
• wherein the polyester resin has a glass transition temperature (Tg) satisfying (a):
• (a) glass transition temperature (Tg):
• 61° C.≦Tg≦72° C. said method comprising, in the following order:
• (1) melt-spinning a polyester resin through a spinneret, to obtain a melt-spun thread;
• (2) cooling the melt-spun thread to a glass transition temperature of the melt-spun thread or lower, thereby obtaining a cooled thread;
• (3) running the cooled thread within a tube heating apparatus, thereby obtaining a heat-stretched thread,
• (4) contacting the heat-stretched thread with an oil, to obtain an oiled thread;
• and
• (5) winding the oiled thread at a rate of 3500 to 5500 m/minute.

A method for dyeing a fiber, the method comprising:

• dyeing the fiber, with a disperse dye under normal pressure at 95 to 100° C.
• wherein said fiber comprises a polyester resin wherein said polyester resin is a copolymer comprising:
• a dicarboxylic acid component comprising 80 mol % or more of a terephthalic acid component, 4.0 to 12.0 mol % of a cyclohexane dicarboxylic acid component, and 3.0 to 8.0 mol % of an adipic acid component;
• and a glycol component comprising, as a main component, an ethylene glycol component,
• wherein the polyester resin has a glass transition temperature (Tg) satisfying (a):
• (a) glass transition temperature (Tg):
• 61° C.≦Tg≦72″C.