PRODUCTION OF COPOLYAMIDE FIBER

PURPOSE:A copolyamide containing aromatic amide units at a specific ratio is meltspun, cooled and taken up at a specific speed, then heat drawn at a specific draw, ratio, at temperature lower than the melting point of the copolyamide to produce the titled fiber of high toughness and tenacity in high...

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Bibliographische Detailangaben
Hauptverfasser:	KIRIYAMA SHIYUNICHI, KUDOU KAZUNARI, SUGIE TSUTOMU
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 NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	PURPOSE:A copolyamide containing aromatic amide units at a specific ratio is meltspun, cooled and taken up at a specific speed, then heat drawn at a specific draw, ratio, at temperature lower than the melting point of the copolyamide to produce the titled fiber of high toughness and tenacity in high operability. CONSTITUTION:A copolyamide that is prepared from a mixture of nylon 66 salt with p-phenylenediamine and terephthalic acid by melt polymerization, thus containing 1-50mol% aromatic amide units is melt-spun, solidified by cooling and taken up at a speed higher than 1,000m/min. Then, drawing is effected at a draw ratio of 92-98% the draw ratio at break at a temperature 100-20 deg.C lower than the melting point of the copolyamide to produce the objective fiber giving a curve (real line) that causing no reduction in yarn strength compared with that (dotted line) of nylon 66 even when the spinning speed is increased.