Heatset temperature measurements

To explore how NIR methodology can be used for textile products and to demonstrate the versatility and robustness of the technology, a more detailed description is provided in Section 25.3.2 to Section 25.3.6 for a few of the more common NIR textile techniques. Example textile processes and measurements are discussed and reviewed for the areas of moisture content, EOE, heatset temperature, textile product identification, and at-line/on-line analyses. 

Various techniques, such as x-ray diffraction, fiber density, dyeing or dye rate methods, and thermal methods of analysis, used to estimate the heat history and heatset temperature of synthetic yarns are not suitable for routine quality control/process control because of the time and extensive sample preparation required to perform the test. Therefore, NIR methodology offers a simple, rapid, and accurate technique for measuring the heatset temperature of carpet yarns. 

At-Line Measurement of Carpet Yarn Heatset Temperature... 

FIGURE 25.21 Effect of environmental measurement conditions on the NIR-determined Suessen heatset temperature, regular (Machine D) vs. hi-twist (Machine B) heatsetting machines. [Redrawn from information in Rodgers and Ghosh, Textile Res. J., 7T. 135 (2001).]... 

NIRS in the 2250-2400 nm region in combination with PCA was demonstrated to be also a viable technique for detection of polymeric contaminations (HDPE and PP) in both wool and cotton yarns. Moreover, wool researchers have shown strong interest in NIRS for the determination of composition (extractables) [236]. The heatset temperature of carpet yarns, amount of dye(s) in yarn(s), and quality of cotton and wool [325] are also routinely measured. 

---