POLYESTER MODIFIED WITH POLYETHYLENE GLYCOL AND PENTAERYTHRITOL

摘要

A polyester composition is disclosed that is particularly suitable for filament. The composition is formed of polyethylene terephthalate; 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 and other cellulosic fibers (natural or synthetic) but less than the amount that would reduce the favorable elastic memory properties of the polyester composition; and a chain branching agent selected from the group consisting of trifunctional alcohols and acids and tetrafunctional alcohols and acids that will copolymerize with polyethylene terephthalate, the chain branching agent being present in an amount sufficient to raise the melt viscosity of the polyester composition to a level that permits filament manufacture under conditions that are substantially the same as those under which filament can be formed from unmodified polyethylene terephthalate.