Bushing for producing glass fibers and method for producing glass fibers
Abstract:
A bushing for producing glass fibers, including: a plurality of nozzles made of platinum or the like to discharge molten glass; and a base plate made of platinum or the like. A coating layer is preferentially formed on an outer circumferential face on a tip part on the side of glass discharge of the nozzle, and a width of the coating layer is 5% or more and 95% or less with respect to the entire length of the nozzle. The base plate includes a non-coating area. Areas of the nozzles and the base plate not provided with the coating layer act as a sacrificial metal for protecting the nozzle tip parts. In consideration of the sacrificial metal, a coverage rate P of the coating layer on the nozzle tip parts calculated with a prescribed equation is preferably 5% or more and 350% or less.
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