Tom- some questions:
1. Does your aqueous cleaning include saponifier? If so, saponifier will
often craze moulded plastics, especially if they are not extensively stress
relieved. A major manufacturer wanted to exit solvents over the worry of plastics
crazing, so put in aqueous saponifier and the crazing was much, much worse.

2. Have the suppliers of the cleaning system, parts supplier or plastics
maker offered any temperature exposure data vs parts survival in their public
literature or under direct questioning?

If any of the above are a possible source of your problem, you could make
adjustments based on the information supplied. If you are just doomed re this
tack, and your customers require clean products, then you may wish to implement
cleaning with a mild, lower boiling point cleaning system. An in-line system
would allow continuous output of product without the off-line baking step and
attendant handling required in your present system.

Bill Kenyon
Global Centre Consulting
3336 Birmingham Drive
Fort Collins, CO   80526
Tel: 970.207.9586     Cell: 302.377.4272
[contact me off-line if you have other questions etc. re this problem]

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