KennyB, was the ESD bag an antistatic or static dissipative? Thanks, Jon -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken Bloomquist Sent: Wednesday, September 03, 2008 10:36 AM To: [log in to unmask] Subject: Re: [TN] ANTISTATIC MATERIAL QUESTION Hi Jon, I'm not sure what the drying time is on the AR that you are using but I know with the UR we use takes about a week to fully dry. We experienced a situation where we were having some boards built and coated in Mexico. The boards were put into ESD bags after a couple of days and shipped to our facility. A combination of not being fully dried and sitting in a hot truck in the Mexican sun at the border cause the bags to stick to the coating. When we tried to remove the bags they had to be cut away they were stuck so badly. I guess what I'm saying is to make sure that they are fully cured before putting them into the "proper" ESD packaging. KennyB -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Wednesday, September 03, 2008 8:05 AM To: [log in to unmask] Subject: Re: [TN] ANTISTATIC MATERIAL QUESTION Date: Tue, 2 Sep 2008 10:43:10 -0500 From: "Roberts, Jon" <[log in to unmask]> Subject: ANTISTATIC MATERIAL QUESTION We have been noticing if bubble wrap is allowed to come in direct contact with a circuit card assembly (non ESD and ESD) sensitive that the bubble wrap leaves impression in the AR coating. Do know if the resulting impression is related to uncured coating or reaction of the bubble wrap material? Thanks for any information, Jon Jon, Not to be a stickler on coating questions, but there is no such thing as uncured AR coating. Because the coating is lacquer, it doesn't cure, it only dries. The solvents in which the acrylic resin is dissolved leave the coating and all that is left is the plastic.?That plastic does not cross-link, so it?can be redissolved at will, and that's why AR is the strippable coating that it is.?Insufficient drying?could?contibute to the condition you describe.?In our experience?we believe that plasticizers from the bubble wrap (notoriously oily, nasty stuff, it even seems like the antistatic is worse) are actually redissolving the coating in areas of contact. This would be more noticeable if the coating were not completely dry, since it's already somewhat melted. In any case, our solution is not to let the bubble wrap come into direct contact with any type AR coating. Mike Moninger Thermospray Company Inc. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 ----------------------------------------------------- This communication is intended only for use by the addressee(s) named herein and may contain business confidential and/or legally privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, disclosure or copying of this e-mail and its contents is strictly prohibited. If you have received this e-mail in error, kindly notify the sender by replying to this message. In addition, please permanently delete the message and any attachments without copying or disclosing the contents. Thank you for your cooperation. THIS DOCUMENT AND/OR SHIPMENT MAY CONTAIN COMMODITY ITEMS, SOFTWARE OR TECHNICAL DATA THAT IS CONTROLLED BY U.S. EXPORT LAW, AND MAY NOT BE EXPORTED OUTSIDE THE UNITED STATES OR TO NON U.S. PERSONS WITHOUT THE APPROPRIATE EXPORT LICENSE FROM EITHER THE U.S. DEPARTMENT OF STATE OR DEPARTMENT OF COMMERCE. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------