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

(19)

(11)

EP 0 456 494 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.03.1992 Bulletin 1992/13

(43)	Date of publication A2:
	13.11.1991 Bulletin 1991/46

(21)	Application number: 91304188.5

(22)	Date of filing: 09.05.1991

(51)	International Patent Classification (IPC)⁵: D01F 6/62

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30)

Priority:

11.05.1990 US 523141

(71)	Applicant: HOECHST CELANESE CORPORATION
	Somerville, N.J. 08876 (US)

(72)	Inventors:
	Simons, Holmes F. Charlotte, North Carolina (US) Griffith, Ronald L. Charlotte, North Carolina (US)

(74)	Representative: De Minvielle-Devaux, Ian Benedict Peter et al
	CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)

(56)

References cited: :

(54)	An as-spun polyester yarn having small crystals and high orientation

(57) 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 55Å and either an optical birefringence greater than 0.090 or an amorphous birefringence greater than 0.060 or a long period spacing less than 300Å.

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