BUSHING FOR PRODUCING GLASS FIBERS AND METHOD FOR PRODUCING GLASS FIBERS

The present invention relates to a bushing for producing glass fibers, including: a plurality of nozzles made of platinum or the like from which molten glass is discharged; and a base plate made of platinum or the like. A coating layer is preferentially formed on an outer circumferential face in 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, in at least a part thereof, a non-coating area not provided with the coating layer. 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 where the coating layer is formed. In consideration of the action of the sacrificial metal, a coverage rate P of the coating layer in the nozzle tip parts calculated in accordance with a prescribed equation is preferably 5% or more and 350% or less. A cause of nozzle abrasion in a bushing for producing glass fibers is found, and nozzles are minimally abraded in a long-term operation.