SPINNING OF AROMATIC POLYESTER FIBER

摘要

PURPOSE:A melt-spinning unit in which its polymer pathes are filled with meltal or ceramic is used to effect melt-spinning of a specific polyester whereby the residence time of the polymer is controlled to produce polyester fiber of high strength and high elasticity. CONSTITUTION:The inside of the polymer paths in the melt-spinning unit is filled with granules of a metal such as gold or silver or ceramic such as alumina or zirconia, then an aromatic polyester which shows optical anisotropy, when melted and has a flowing temperature of 280-380 deg.C is melt-extruded through the above-stated unit so that the residence time of the polymer in the unit is controlled less than 30min, preferably for 2-20min to prevent the melted polymer from bubbling and deteriorating and give aromatic polyester fiber of high strength and elasticity with improved operation stability.