3M #250 is a paper backed masking tape which has pull test strength quality rubber adhesive combined with a flatback paper (much more ESD friendly) backing. It has solvent resistance and can be processed as high as 250 F for 30 minutes. There are other cheaper alternative tapes out there but my experience was that this tape always took its adhesive with it when demasking. It qualifies to several formal standards related to pull test adhesion. Depending on your application, a balanced ESD ionizer is a good addition to the masking/demasking station if you are dealing with ESD sensitive assemblies. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. Sent: Monday, May 16, 2011 8:04 AM To: [log in to unmask] Subject: Re: [TN] Conformal Coat tape I hate to throw another monkeywrench into all of this, but please keep in mind that the polyester tapes can generate one very large ESD jolt when being stripped off, either off the roll, or off the product. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting Sent: Monday, May 16, 2011 9:20 AM To: [log in to unmask] Subject: Re: [TN] Conformal Coat tape Craig, We ran into a similar problem. Below is an excerpt from my ECO to change/correct masking issues. The Shercon tape has a silicone adhesive that reacts with the conformal coating causing a blooming appearance when inspected under black light. It is also visible under normal lighting. Mark existing material "SHERCO*CC00250" as OBS. Scrap the Shercon product. Dots are green in color. No Shercon purchases shown for this part. Add "ATS*04668DOT02513100" to AML. Manufacturers description "ATS668 Dots 1/4" Diam 13,100/ roll". Available from Ellsworth Adhesives. I hope this helps. Phil Nutting Design for Manufacturing Engineer Kaiser Systems, Inc. 126 Sohier Road Beverly, MA 01915 voice: 978-922-9300 x1310 fax: 978-922-8374 e-mail: [log in to unmask] www.kaisersystems.com http://www.linkedin.com/in/philnutting -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan Sent: Monday, May 16, 2011 9:34 AM To: [log in to unmask] Subject: [TN] Conformal Coat tape Well, I suppose this is a repeat from a few years ago when Humiseal stopped selling their conformal coat tape and left everyone searching for alternatives. Recap: Humiseal HT-500 tape was manufactured exclusively for Humiseal by St. Gobain. The St. Gobain part number is M797. St. Gobain had numerous quality issues and as such Humiseal ceased the line. St. Gobain continues to manufacture the tape. We had continued to use the St. Gobain part with minor quality problems here and there. We decided to live with the issues because the tape works so well with our Acrylic coating. Fast forward to today: St. Gobain decided to put the tape on a liner to correct various issues they and other customers had. Problem is we now see excessive residue left on the boards as well as the rolls falling apart if we're not careful with handling. They've also scaled back production and as such the lead times have quadrupled. So, my question is can anyone share what they use with their acrylic coatings? We use a boat load of this stuff so I need to find a seamless replacement. Thank you, Craig Sullivan Manufacturing Engineer MPL Incorporated P: 607.266.0480 F: 607.266.0482 [log in to unmask]<mailto:[log in to unmask]> P Please consider the environment before printing this e-mail. ________________________________ Confidentiality Notice: This e-mail contains privileged and confidential information which is the property of MPL Incorporated, intended only for the use of the intended recipient(s). Unauthorized use or disclosure of this information is prohibited. If you are not an intended recipient, please immediately notify MPL Incorporated and destroy any copies of this email. Receipt of this e-mail shall not be deemed a waiver by MPL Incorporated of any privilege or the confidential nature of the information. Export Control: This message is intended only for the addressee and may contain information that is company confidential or privileged. Any technical data in this message may be exported only in accordance with the U.S. International Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export Administration Regulations (15 CFR Parts 730-774). Unauthorized use is strictly prohibited and may be unlawful. If you are not the intended recipient, or the person responsible for delivering to the intended recipient, you should not read, copy, disclose or otherwise use this message. If you have received this email in error, please delete it, and advise the sender immediately. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- Note: All the information contained in this e-mail and its attachments is proprietary to Kaiser Systems, Inc. and it may not be reproduced without the prior written permission of sender. If you have received this email in error, please immediately return it to sender and delete the copy you received. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ------------------------------------------------------------------------------ This message and any attachments are solely for the use of the addressee and may contain L-3 proprietary information that may also be defined as USG export controlled technical data. If you are not the intended recipient, any disclosure, use or distribution of its content is prohibited. Please notify the sender by reply e-mail and immediately delete this message and any attachments. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------