Chapter 5
I 1788 - State Of The Art In Textile Technology
II Australian Textiles - The Early Days
III Australian Textiles - The 20th Century
IV Australian Textiles - To Date
i Narrow-tape Weaving Loom and the Nyguard Zipper
ii Vacuum Packaging System for Knitting Yarns
iii 'Computer' Socks
iv 'Jumbo Cakes' (Large Cheeses of Spun Yarn)
v Out-Draw Texturing - Nylon
vi 'Bored-Out' Pack
vii Computer Control of Heat-Setting Conditions for Synthetic Yarns
V Acknowledgements
References
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'Bored-Out' Pack
Synthetic fibre spinning requires the molten polymer to pass through a 'final filter' before extrusion through the spinneret and freezing to form threadlines. The filter (usually of sand or alumina) and the spinneret are combined in an assembly called a 'pack'.After a period of use, the interstices of the filter medium become clogged with particles of polymer delustrant, degraded polymer and foreign matter, so that the system pressure rises to excessive levels and the pack has to be replaced. Pack changes are normally required after a few days of operation, and constitute a substantial cost item in labour and materials.
With the I.C.I. (U.K.) technology used by Fibremakers, the internal configuration of the nylon pack body was in the form of a section of a cone, while the external shape was basically cylindrical. This results in the potential volume of the pack body not being fully utilized. The Australian plant modified the internal design to form an almost cylindrical cavity, thus increasing the volume by about 15 per cent. This effectively increased the pack life by about the same extent, resulting in substantial savings.
Organisations in Australian Science at Work - Fibremakers Pty Ltd
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Australian Academy of Technological Sciences and Engineering |  |
© 1988 Print Edition page 304, Online Edition 2000
Published by Australian Science and Technology Heritage Centre, using the Web Academic Resource Publisher
http://www.austehc.unimelb.edu.au/tia/307.html