ガラス溶融紡糸過程における伸長流動

概要

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Melt spinning experiments of E glass have been carried out under wide range of spinning temperatures, out-put velocities and take-up velocities. Diameter of spinning fiber, fiber temperature along the spinline and tensile force were obtained as function of distance from the spinneret. Distributions of the diameter were almost independent of spinning temperature. The effect of the variation of out-put velocity on temperature distributions along the spinline was noteworthy. The tensile force was strongly affected by the change of spinning temperature and take-up velocity, but was independent of out-put velocity. The elongational viscosity of the molten glass was monotonously increased with increasing the distance from the spinneret along the spinline. For lower take-up velocity, the logarithm of the elongational viscosity was proportional to the inverse of absolute temperature and was independent of either out-put velocity or spinning temperature. For higher take-up velocity, however, the above proportionality does not hold. The elongational flow of the molten glass during spinning was found to be non-Newtonian flow. The non-Newtonian flow was discussed in terms of the internal structure of glass.
日本レオロジ-学会の論文