Polyester modified with polyethylene glycol and pentaerythritol

A blended yarn comprising:

• cotton fibers in an amount of between about 30 percent and 70 by weight;
• and
• polyester staple fibers as the remainder;
• said polyester staple fibers formed from a polyester composition consisting essentially of:
• polyethylene terephthalate;
• and
• polyethylene glycol in an amount sufficient to increase the wetting and wicking properties of a filament made from the composition to a level substantially similar to the wetting and wicking properties of cotton but less than the amount that would reduce the favorable elastic memory properties of the polyester composition, said amount being greater than about 4 percent up to about 20 percent by weight based upon the weight of the composition;
• and
• pentaerythritol in an amount that raises the melt viscosity of the polyester composition to a level that permits filament manufacture with said amount of said polyethylene glycol and under conditions that are substantially the same as those under which filament can be formed from unmodified polyethylene terephthalate.

A fabric comprising a blended yarn of:

• cotton fibers;
• and
• polyester staple fibers;
• said polyester staple fibers formed from a polyester composition consisting essentially of polyethylene terephthalate;
• and polyethylene glycol in an amount sufficient to increase the wetting and wicking properties of a filament made from the composition to a level substantially similar to the wetting and wicking properties of cotton but less than the amount that would reduce the favorable elastic memory properties of the polyester composition, said amount being greater than about 4 percent up to about 20 percent by weight based upon the weight of the composition;
• and pentaerythritol in an amount that raises the melt viscosity of the polyester composition to a level that permits filament manufacture with said amount of said polyethylene glycol and under conditions that are substantially the same as those under which filament can be formed from unmodified polyethylene terephthalate.