METHOD FOR MANUFACTURING BASALT FIBER

摘要

Provided is a method of manufacturing a basalt filament in order to inhibit crystallization and binding of basalt fiber and therefore, to improve the heat-resistance property of basalt fiber. The manufacturing method of a basalt filament comprises the steps of: grinding basalt rock as a material; washing a resultant ground rock; melting the ground rock that has been washed; transforming a molten product into fiber; and drawing the fiber in an aligned manner, and winding. The temperature of the molten product in the melting step is 1400 to 1650deg.C and preferably 1530 to 1550deg.C, and log eta is 2.15 to 2.35 dPa.s and preferably 2.2 to 2.3 dPa.s, in which eta denotes the viscosity of the molten product.