Textile fiber

A textile fiber comprised of

• A. a polyetherester of
• 1. terephthalic acid, and
• 2. a diol component comprised of
• a. ethylene glycol, and
• b. from 8 to 10 weight percent, based on the weight of the polyester, of poly(oxyethylene)glycol having a molecular weight in the range of 300-500,
• B. from 75 to 150 weight parts per million, based on the weight of the polyetherester, cobaltous aluminate,
• C. from 0.02 to 0.13 weight percent, based on the weight of the polyetherester, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] having the structure ##STR11## where ##STR12## and D. a whitening agent which is
• 1. from 1.0 to 2.5 weight per million, based on the weight of the polyetherester, of a thermally stable, organic compound corresponding to the structure ##STR13##
• or 2. from 150 to 300 weight parts per million, based on the weight of the polyetherester, of a thermally stable, organic compound corresponding to the structure ##STR14## and E. from 0.1 to 0.4 weight percent, based on the weight of the polyetherester, of TiO.sub.2 particles having a size of less than 5 microns.

A textile fiber comprised of an admixture of

• A. a polyetherester of
• 1. terephthalic acid, and
• 2. a diol component comprised of
• a. ethylene glycol, and
• b. from 6 to 12 weight percent, based on the weight of the polyester, of poly(oxyethylene)glycol having a molecular weight in the range of 200-600,
• B. from 50 to 200 weight parts per million, based on the weight of the polyetherester, cobaltous aluminate,
• C. from 0.01 to 0.16 weight percent, based on the weight of the polyetherester, of a stabilizer effective to reduce oxidative degradation of the polyester corresponding to the structure ##STR15## where n is from 1 to 4,
• R is a radical selected from the group consisting of
• 1. neopentanetetrayltetraskis[oxy(3-oxotrimethylene)],
• 2. phosphinylidynetrioxy,
• 3. 2,4,6-trimethyl-1,3,5-benzenetriyltrimethylene,
• 4. alkylene having 1 to 5 carbon atoms,
• 5. alkyl having 1 to 12 carbon atoms, and
• 6. (2,4,6-trioxo-1,2,3,4,5,6-hexahydro-s-triazine-1,3,5-triyl)tris(3-oxotrime thylene),
• 7. [3-octadecyloxy)-3-oxopropyl], and
• A is a monovalent radical selected from the group consisting of
• 1. tertiary alkyl having 4 to 8 carbon atoms,
• 2. alkyl having 8 to 22 carbon atoms, and
• 3. secondary alkyl having 12 to 24 carbon atoms, and
• D. a whitening agent which is from 0.5 to 4.0 weight parts per million, based on the weight of the polyetherester, of a thermally stable, organic compound characterized by having a high reflectance in the range of 400 to 500 nm and strong absorbance in the range of 550 to 650 nm, and
• E. a whitening agent which is from 100 to 400 weight parts per million, based on the weight of the polyetherester, of a thermally stable, organic compound having a fluorescence emission spectrum in methylene chloride in the range of 425 to 445 nm.

A textile fiber comprised of

• A. a polyetherester of
• 1. terephthalic acid, and
• 2. a diol component comprised of
• a. ethylene glycol, and
• b. from 8 to 10 weight percent, based on the weight of the polyester, of poly(oxyethylene)glycol having a molecular weight in the range of 300-500,
• B. from 75 to 125 weight parts per million, based on the weight of the polyetherester, cobaltous aluminate,
• C. from 0.02 to 0.13 weight percent, based on the weight of the polyetherester, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] having the structure ##STR16## where ##STR17## and D. a whitening agent which is from 1.0 to 2.5 weight parts per million, based on the weight of the polyetherester, of a thermally stable, organic compound corresponding to the structure ##STR18## E. a whitening agent which is from 150 to 300 weight parts per million, based on the weight of the polyetherester, of a thermally stable, organic compound corresponding to the structure ##STR19## and F. from 0.1 to 4.0 weight percent, based on the weight of the polyetherester, of TiO.sub.2 particles having a size of less than 5 microns.