POLYETHYLENE NAPHTHALATE FIBER AND PROCESS FOR PRODUCING THE POLYETHYLENE NAPHTHALATE FIBER

Disclosed is a polyethylene naphthalate fiber characterized in that the crystal volume and the crystallinity of the fiber obtained by wide-angle X-ray diffractometry are 100 to 200 nm3 and 30 to 60%, respectively. Preferably, the maximum peak diffraction angle in the wide-angle X-ray diffraction pat...

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Bibliographic Details
Main Authors SHIMADA, SHINTARO, TERASAKA, FUYUKI
Format Patent
LanguageEnglish
French
Japanese
Published 17.09.2009
Subjects
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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Summary:Disclosed is a polyethylene naphthalate fiber characterized in that the crystal volume and the crystallinity of the fiber obtained by wide-angle X-ray diffractometry are 100 to 200 nm3 and 30 to 60%, respectively. Preferably, the maximum peak diffraction angle in the wide-angle X-ray diffraction pattern is 23.0 to 25.0 degrees. Also disclosed is a process for producing the polyethylene naphthalate fiber, characterized in that a specific phosphorus compound is added into a polymer during melting, the spinning rate is 4000 to 8000 m/min, and, immediately after delivery through a spinneret, the molten polymer is passed through a heating spinning cylinder having a high temperature, which is more than 50°C above the temperature of the molten polymer, and is stretched. L'invention concerne une fibre de naphtalate polyéthylène caractérisée en ce que le volume de cristal et la cristallinité de la fibre obtenue par diffractométrie grand angle à rayons X sont compris entre 100 et 200 nm3 et 30 et 60%, respectivement. De préférence, l'angle de diffraction de pic maximal dans le schéma de diffraction grand angle à rayons X est compris entre 23,0 et 25,0 degrés. L'invention porte également sur un procédé de fabrication de fibre de naphtalate polyéthylène, caractérisé en ce que l'on ajoute un composé de phosphore spécifique à un polymère pendant la fusion, la vitesse de filage est comprise entre 4000 et 8000 m/minute, et, immédiatement après acheminement à travers une filière, le polymère fondu passe à travers un cylindre de chauffage et de filage à une haute température, supérieure de plus de 50°C à celle du polymère fondu, avant d'être étiré.
Bibliography:Application Number: WO2009JP54590