Brian Ellis wrote: > Sorry, but a) what plastic LCP > b) what contaminants are you trying to remove Small amounts of plastic debris - dust if you like. The parts will be free from chemical contamination so that's not an issue. > c) why are you using ultrasound Seems like the obvious way to remove small particles from the surface. Is there a better way? > d) what additives, if any, are added to the water None that I know of. > e) what temperature See process details below: 4 tanks ultrasonicator *1st tank: warm pure water to circulate and filter Ultrasonic power: 600W x 28KHZ Heater: 2KW x 220V Temp. control: 50~60 degree C Time used in this tank: 6 min. *2nd tank: pure water to overflow Ultrasonic power: 600W x 28KHZ Time used in this tank: 6 min. *3rd tank: warm pure water to circulate and filter Ultrasonic power: 600W x 28KHZ Heater: 3KW x 220V Temp. control: 50~60 degree C Time used in this tank: 6 min. *4th tank: air blowing Air pressure: 6 kg / 2cmx4cm Time used in this tank: 6 min. > and f) what characteristics of ultrasound? > Depending on the nature of the plastic, IPA may cause stress-cracking. > I don't think IPA will affect LCP but yes, we have to check that. > Brian > > Eric CHRISTISON wrote: >> We're currently ultrasonically cleaning some plastic parts in DI water >> and may be incurring some microscopic damage to the surface. >> >> We've been directed to use IPA rather than DI water as a cleaning medium >> to give a gentler clean to reduce damage. >> >> Does this sound like a good plan and would there be any other fluids >> that would be more suitable? >> >> Regards, >> >> >> -- >> Eric Christison Msc >> Mechanical Engineer >> Home Personal, Communication Sector >> Imaging Division >> >> STMicroelectronics (R&D) Ltd >> 33 Pinkhill >> Edinburgh EH12 7BF >> United Kingdom >> >> Tel: +44 (0)131 336 6165 >> Fax: + 44 (0)131 336 6001 >> >> --------------------------------------------------- >> Technet Mail List provided as a service by IPC using LISTSERV 1.8e >> To unsubscribe, send a message to [log in to unmask] with following >> text in >> the BODY (NOT the subject field): SIGNOFF Technet >> To temporarily halt or (re-start) delivery of Technet send e-mail to >> [log in to unmask]: SET Technet NOMAIL or (MAIL) >> To receive ONE mailing per day of all the posts: send e-mail to >> [log in to unmask]: SET Technet Digest >> Search the archives of previous posts at: >> http://listserv.ipc.org/archives >> Please visit IPC web site >> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional >> information, or contact Keach Sasamori at [log in to unmask] or >> 847-615-7100 ext.2815 >> ----------------------------------------------------- >> > -- Eric Christison Msc Mechanical Engineer Home Personal, Communication Sector Imaging Division STMicroelectronics (R&D) Ltd 33 Pinkhill Edinburgh EH12 7BF United Kingdom Tel: +44 (0)131 336 6165 Fax: + 44 (0)131 336 6001 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------