A spinning process for producing high strength, high modulus, low shrinkage synthetic yarns

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(11)

EP 0 456 496 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.04.1992 Bulletin 1992/18

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

(21)	Application number: 91304190.1

(22)	Date of filing: 09.05.1991

(51)	International Patent Classification (IPC)⁵: D01D 5/092, D01F 6/62, D01F 6/60

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

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Priority:

11.05.1990 US 523099

(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)

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References cited: :

(54)	A spinning process for producing high strength, high modulus, low shrinkage synthetic yarns

(57) A process for spinning an organic synthetic melt spinnable polymer is disclosed herein. The process includes the steps of: extruding the polymer through a spinneret (16); passing the filaments from the spinneret through an elongated zone (18); maintaining the filaments at a temperature above the glass transition temperature of the polymer within the zone; and thereafter converging the filaments. Alternatively, the process includes the steps of: extruding the polymer through a spinneret; providing an elongated zone having a length of at least 5 meters or means for controlling the temperature within said zone from a predetermined maximum to a predetermined minimum; passing the filaments through the zone; and thereafter converging the filaments.

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