| 摘要 |
PURPOSE:Melted pitch of coal or petroleum is made into fibers using a spinning unit which is composed of a nozzle device having a plate with a plurality of holes bored and of an electrically heating device surrounding the nozzle device to give pitch fibers of very good quality. CONSTITUTION:Melted coal or petroleum pitch is introduced into a nozzle device 16 which is composed of a plate 16b having a plurality of nozzle holes 16a bored. The temperature is controlled here by the electrically heating device including terminals 18 which is electrically connected to the periphery of the nozzle plate 16b. As a result, the melted pitch is kept at a low temperature before it reaches the nozzle device 16 and steeply heated up in a short time, when it passes through nozzle holes 16a to enable the pitch to be formed into fibers in low viscosity, resulting in formation of uniform fibers.
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