Direct measurement of fiber temperature in the continuous drawing process of PET fiber heated by CO2 laser radiation
Direct measurement of fiber temperature in the continuous drawing process of PET fiber heated by CO2 laser radiation
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DOI：
10.3139/217.1684
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发表时间：
2002-06-01
影响因子：
1.3
通讯作者：
Nagura, M
中科院分区：
文献类型：
--
作者：
Okumura, W;Yamaguchi, T;Nagura, M
在连续拉伸过程中，采用二氧化碳激光对聚对苯二甲酸乙二酯（PET）纤维进行加热。数值计算表明，纤维表面的辐射传热比对流传热能更快、更均匀地加热纤维。在CO_2激光加热拉丝过程中，由于颈缩变形发生在0.5mm的范围内，因此可以在线高精度地测量颈缩变形附近的温度。我们用距离分辨率为0.355mm的红外温度计测量了拉丝过程中光纤的温度分布。当拉伸比小于4.5时，T-g小于拉伸比大于5.5时的T-g。拉伸过程中的最高纤维温度随着拉伸比的增加而增加，拉伸比为6.0时最高可达208 ℃。取向诱导结晶在拉伸过程中的速率估计通过比较测量的温度曲线与计算的温度曲线。
Poly(ethylene terephthalate) (PET) fiber was heated by carbon dioxide laser radiation during the continuous drawing process. Numerical calculation shows that the PET fiber can be heated much more rapidly and uniformly by heat radiation than by convective heat transfer through the fiber surface. During CO2 laser heated drawing, temperature in the vicinity of a neck-like deformation can be measured on-line with high precision, because the neck-like deformation is located within a range of 0.5 mm. We measured the fiber temperature profiles on the drawing process by IR thermometer that has a range resolution of 0.355 mm. The temperature at which neck-like deformation of the fiber initiates is higher than T, when draw ratio is less than 4.5, but lower than T-g when draw ratio is more than 5.5. The maximum fiber temperature in the drawing process increases with draw ratio, up to 208degreesC for a draw ratio of 6.0. The rate of orientation-induced crystallization in the drawing process was estimated by comparison of measured temperature profiles with calculated temperature profiles.