A New Concept in Cooler Design for False-Twist Texturing Systems

In false twist texturing, yarns are bulked by the sequential operations of twisting, heating, and cooling. The current speed for false twist texturing is limited by the early onset of threadline instability. It is well known that there is a potential to increase speeds by reducing the length of each...

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Bibliographic Details
Published in:Textile research journal 2002-07, Vol.72 (7), p.567-572
Main Authors: Foster, P.W., Aggarwal, R.J., Lu, B.I., Gunasekera, U.S.W., Cork, C.R.
Format: Article
Language:English
Subjects:
Acceptability
Contact
Coolers
Design engineering
Design parameters
Heat transfer
Running
Textiles
Texturing
Yarns
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Summary:In false twist texturing, yarns are bulked by the sequential operations of twisting, heating, and cooling. The current speed for false twist texturing is limited by the early onset of threadline instability. It is well known that there is a potential to increase speeds by reducing the length of each element of the process. This paper describes the develop ment of a short-length water cooler that operates by direct contact between water and yarn. The important design parameters are identified and optimized, and the predicted perfor mance is in agreement with simple transient heat transfer theory. Trials have shown that commercially acceptable 167 decitex yarns can be produced with continuous running at 1000 m/min and with a potential speed of 1700 m/min or more.
ISSN:0040-5175
1746-7748
DOI:10.1177/004051750207200702