An as-spun polyester yarn having small crystals and high orientation.

摘要

The instant invention is directed to as-spun polyester yarn having small crystals and a high orientation. The as spun polyester yarn is characterized by a crystal size less than 55 ANGSTROM and either an optical birefringence greater than 0.090 or an amorphous birefringence greater than 0.060 or a long period spacing less than 300 ANGSTROM . <IMAGE>