Patent ID: 8800324
Filing Date: 2014-08-12
Classification: C03B,C03C

Abstract:
1. A method for producing a glass fiber, through longitudinally drawing a preform in a drawing kiln, wherein cooling the glass fiber is performed in at least three time periods, wherein the glass fiber is exposed to a first time based cooling rate (ΔT z /Δt) above a crystallization temperature range (ΔT K ), to a second time based cooling rate (ΔT K /Δt) that is greater than the first time based cooling rate within the crystallization temperature range, and to a third time based cooling rate (ΔT T /Δt) which is smaller than the second time based cooling rate below the crystallization temperature range, wherein the first time based cooling rate (ΔT Z /Δt) is caused by a drawing velocity of less than 10 m/min.