Abstract
A mathematical model for the heating of yarn in the false-twist texturizing process was formed, and an equation for the surface temperature of the yarn for contact-type heaters was derived. An expression for the temperature distribution in the cross section of the yarn in the heater zone was derived mathematically. The surface temperatures of nylon and polyester yarns of different deniers were measured and compared with predicted values. For measuring the surface temperature, a Fiber-temp® non-contact-type temperature measuring instrument was used. The yarns were heated using controlled short heaters 12 in. and 8 in. long. The temperature distribution in the cross section of the yarns was calculated from the equation for various yarn speeds and heater temperatures. The temperature difference between the surface and the center of the yarn was found to be small for the normal yarns used in texturizing, even at very high speeds. Polyester yarns were found to heat up faster than nylon yarns due to the lower heat capacity of polyester. The heavy denier yarns were heated more slowly than the lower denier yarns because of the lower A/M (surface area/mass) ratio of the high denier ones.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.