NED Insulation Development

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NED Insulation Development April 2007 Simon
Canfer George Ellwood
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Insulation work plan-2007

• TGA testing on glass tape
• Then heat treatelectrical testing
• Cyanate ester standard laminates
• SBS, fracture
• Literature survey for resin additives
• 2-stack tests using whole cable width
• 10-stack tests using optical extensometer
• Testing of sections from dummy coil

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Progress to date

• Effect of compaction pressure on fracture
  properties
• laminates in production
• Vacuum furnace refurbishment
• New valves, gauges and vacuum pipework

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Woven resizing Process that works for NED
Glass Tape Process Differences
Yarn-sizing Process that does not work for NED

• Existing sizing/lubricants
• Weave
• De-size (heat clean)
• Apply high temp sizing

• Apply enough sizing to yarn for weaving
• Weave

• Used to make thin tape supplied to date

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TGA- results

• Woven resizing 0.2 to 0.4 organics
• Yarn sizing 1.2 to 1.6 organics
• Conclusion
• The amount of sizing is critical
• PROGRESS
• We have 2 new samples of thin tape which have
  0.3 weight loss
• Next action heat treat and electrical test