POLYETHYLENE NAPHTHALATE FIBERS AND METHOD FOR PRODUCING THE SAME
申请人:Shimada Shintaro
公开号:US20110015326A1
公开(公告)日:2011-01-20
Polyethylene naphthalate fibers that are characterized in that the fibers have a crystal volume of from 100 to 200 nm
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obtained by wide angle X-ray diffraction of the fiber and a degree of crystallization of from 30 to 60%. It is preferred that the fibers have a maximum peak diffraction angle of wide angle X-ray diffraction of from 23.0 to 25.0°. The production method thereof is characterized in that a particular phosphorus compound is added to the polymer in a molten state, the spinning speed is from 4,000 to 8,000 m/min, and the molten polymer immediately after discharging from the spinneret is allowed to pass through a heated spinning chimney at a high temperature exceeding a temperature of the molten polymer by 50° C. or more, and is drawn.