Method for producing a glass fiber and device
AssigneeJ-Fiber GmbH
InventorsWolfgang Hämmerle, Lothar Brehm, Matthias Auth
Life of this patent
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Abstract
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 above a crystallization temperature range, to a second time based cooling rate that is greater than the first time based cooling rate within the crystallization temperature range, and to a third time based cooling rate which is smaller than the second time based cooling rate below the crystallization temperature range.
Claims9
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 (ΔTz/Δt) above a crystallization temperature range (ΔTK), to a second time based cooling rate (ΔTK/Δt) that is greater than the first time based cooling rate within the crystallization temperature range, and to a third time based cooling rate (ΔTT/Δt) which is smaller than the second time based cooling rate below the crystallization temperature range, wherein the first time based cooling rate (ΔTZ/Δt) is caused by a drawing velocity of less than 10 m/min.
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 (ΔTZ/Δt) above a crystallization temperature range (ΔTK), to a second time based cooling rate (ΔTK/Δt) that is greater than the first time based cooling rate within the crystallization temperature range, and to a third time based cooling rate (ΔTT/Δt) which is smaller than the second time based cooling rate below the crystallization temperature range, wherein the third time based cooling rate (TT/ΔT) is caused by a second kiln device arranged downstream of the drawing kiln and/or the cooling path, wherein the second kiln device maintains an entry temperature (TK1) within a core zone of the glass fiber, wherein the entry temperature (TK1) is provided at the second kiln device.
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 (ΔTZ/Δt) above a crystallization temperature range (ΔTK), to a second time based cooling rate (ΔTK/Δt) that is greater than the first time based cooling rate within the crystallization temperature range, and to a third time based cooling rate (ΔTT/Δt) which is smaller than the second time based cooling rate below the crystallization temperature range, wherein an irradiation with a spectral range between 170 nm and 12 μm is provided at the preform and/or the glass fiber.
Dependencies are inferred from the claim text.