In message <[email protected]>, dated Wed, 19 Dec 2007, "Tyra, John" <[email protected]> writes:
>The good material is Nylon 66 and the bad material is PBT. The issue is >the bad material cracks when a screw is inserted into the mounting >screw boss.. These materials are chemically very different, and a plastics chemist should be able to give you a reliable test. Possibilities are: Nylon 66 is attacked by/dissolves in some simple organic solvents that don't touch PBT. Nylon 66 (if not coloured black) absorbs dye; PBT doesn't. I didn't find anything easily accessible from a Google search. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk For very important information, please turn over. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
