METHOD FOR MANUFACTURING ACRYLONITRILE BASED FIBER BUNDLE AND METHOD FOR MANUFACTURING CARBON FIBER BUNDLE

The problem addressed by the present invention is to provide a drawing method with superior process transit properties when pressurized steam drawing is carried out on an acrylonitrile based fiber bundle used as precursor fiber for a carbon fiber bundle, especially when high-speed processing with a...

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Bibliographische Detailangaben
Hauptverfasser:	OHASHI TAKEYA, TAMURA TOMOKI, IKUTA HIROYOSHI
Format:	Patent
Sprache:	chi ; 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:	The problem addressed by the present invention is to provide a drawing method with superior process transit properties when pressurized steam drawing is carried out on an acrylonitrile based fiber bundle used as precursor fiber for a carbon fiber bundle, especially when high-speed processing with a high draw ratio is carried out. The present invention is a method for manufacturing an acrylonitrilebased fiber bundle that spins a spinning solution that includes an acrylonitrile based polymer and then performs pressurized steam drawing of a fiber bundle (7) using a pressurized steam drawing device (A) that has at least two regions, a preheated region (1) on the fiber bundle introduction side and a heated region (2) on the fiber bundle extracted side, said two regions being separated by sealing members (3b1, 3b2). The preheated region (1) is in a pressurized steam atmosphere of 0.05-0.35 MPa, and the heated region (2) is in a pressurized steam atmosphere of 0.45-0.70 MPa. The temperaturedifference [delta]T1 presc