Method for manufacturing basalt fiber

Details Method for manufacturing basalt fiber Method for manufacturing basalt fiber

2006-06-19

2011-10-18

Lazorcik, Jason L. (Department: 1741)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With fiber drawing or pulling

C065S479000, C501S035000, C501S036000

Reexamination Certificate

active

08037719

ABSTRACT:
Basalt filament is manufactured in such a manner that the fiber diameter can be controlled and the filament is not severed during the winding step. A network former and a glass modifier are formed and maintained with respect to basalt rock ore, and the crystallization and binding of basalt fiber are inhibited, the heat-resistance property of basalt fiber is greatly improved from the conventional 750° C. to 850 or 900° C., and significant cost reduction is achieved over conventional products. The method includes 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 it. The temperature of the molten product in the melting step is 1400 to 1650° C., and log η is 2.15 to 2.35 dPa·s and preferably 2.2 to 2.3 dPa·s, where η is the viscosity of the molten product.

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