Highly oriented polymer fiber and method for making the same

The present invention provides a highly oriented aramid fiber with high tensile strength, high tensile modulus and low breakage elongation by spinning liquid crystal polymers such as aramids and drafting the polymer in or adjacent to a first coagulating bath. A polymer solution with concentration of...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAI, KIGEN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TEXTILES
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Beschreibung
Zusammenfassung:	The present invention provides a highly oriented aramid fiber with high tensile strength, high tensile modulus and low breakage elongation by spinning liquid crystal polymers such as aramids and drafting the polymer in or adjacent to a first coagulating bath. A polymer solution with concentration of 4-24 weight % is extruded as a stream into a non-coagulating fluid, and the stream is stretched in the non-coagulating fluid and passed through a first coagulating bath where it is drafted by using a drafting roller, so that the polymer concentration of the flue is increased sufficient to form fibers. As a result, a highly oriented aramid fiber with tensile strength of 1500-5000 MPa, tensile modulus of 200-500 GPa, and the % elongation of 0.8-1.4 is provided.