ABSTRACT

The temperature of melt blowing (MB) and melt spun fibers is frequently measured using infrared thermography (IRT). However, measurements are affected by the size and curvature of the fiber and by reflected radiation from the nozzle. A procedure was developed to obtain accurate measurements of fiber temperature, which corrects fiber size, fiber curvature, and reflected radiation. This procedure is more general than the ones used so far to correct fiber temperature because it corrects the three abovementioned factors using a single correction formula, this being the first time that fiber temperature correction for reflected radiation has been accounted for. It is also more accurate because it uses the local fiber diameter to correct fiber curvature, instead of mean fiber diameter. The procedure was used to measure the temperature of MB adhesive fibers produced by two multi-hole nozzle designs, the results indicating that, in melt blowing applications, the distortion caused by fiber curvature and reflected radiation on the measurement proves to be far more significant than that caused by fiber size, while correction generally leads to an increase in fiber temperature. Considerations as to the effect of different parameters on temperature correction, as well as the quality of thermographic images, are also provided throughout the text. The conclusions emerging from this study allow more accurate temperature measurements of melt blown and melt spun fibers to be obtained.

摘要

熔喷 (MB) 和熔纺纤维的温度经常使用红外热成像 (IRT) 进行测量。但是，测量会受到光纤的尺寸和曲率以及喷嘴反射辐射的影响。开发了一种程序来获得光纤温度的准确测量值，从而校正光纤尺寸、光纤曲率和反射辐射。这个程序比目前用于校正光纤温度的程序更通用，因为它使用单个校正公式校正上述三个因素，这是第一次考虑反射辐射的光纤温度校正。它也更准确，因为它使用局部纤维直径而不是平均纤维直径来校正纤维曲率。该程序用于测量由两个多孔喷嘴设计生产的 MB 粘合纤维的温度，结果表明，在熔喷应用中，由纤维曲率和反射辐射引起的变形在测量中被证明远比这是由纤维尺寸引起的，而校正通常会导致纤维温度升高。在整个文本中还提供了关于不同参数对温度校正的影响以及热成像图像质量的考虑。从这项研究中得出的结论可以更准确地测量熔喷和熔纺纤维的温度。事实证明，由光纤曲率和反射辐射引起的失真比由光纤尺寸引起的失真要严重得多，而校正通常会导致光纤温度升高。在整个文本中还提供了关于不同参数对温度校正的影响以及热成像图像质量的考虑。从这项研究中得出的结论可以更准确地测量熔喷和熔纺纤维的温度。事实证明，由光纤曲率和反射辐射引起的失真比由光纤尺寸引起的失真要严重得多，而校正通常会导致光纤温度升高。在整个文本中还提供了关于不同参数对温度校正的影响以及热成像图像质量的考虑。从这项研究中得出的结论可以更准确地测量熔喷和熔纺纤维的温度。在整个文本中也提供了。从这项研究中得出的结论可以更准确地测量熔喷和熔纺纤维的温度。在整个文本中也提供了。从这项研究中得出的结论可以更准确地测量熔喷和熔纺纤维的温度。