Many thanks for this detail  Wayne 



Rich  Kraszewski 

Senior Staff Process Engineer

Plexus 

Ship To - 2444 Schultz Dr. Neenah, WI 54957-2444

Mail To - P.O. Box 2444 Neenah, WI 54957-2444

Phone: (920) 969-6075

www.plexus.com/(NASDAQ PLXS)

[log in to unmask]





* * * * * * * * CONFIDENTIALITY NOTICE * * * * * * * *



This e-mail and any attachments are confidential from Plexus Corp. and may contain information which is privileged, confidential, and/or protected by non-disclosure agreements.  They are intended solely for the use of the named addressee(s).  .  Any unauthorized use or disclosure may be unlawful.  If you are not a named addressee, you must not use, disclose, retain or reproduce all or any part of the information contained in this e-mail or any attachments If you have received this transmission in error, please destroy it and notify us immediately by return e-mail or by calling + 1 888 208 9005.





-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Showers

Sent: Thursday, May 10, 2018 8:36 PM

To: [log in to unmask]

Subject: Re: [TN] Liquid Latex Masking for Wave Soldering



I use 2 different materials and processes and used UV cure in a prior timeline:

Present:

If I have high volume, with SMT or through-hole, at least pre-wave on only a single side, I use Lackwerke Peters SD2950 series.  It costs a few pennies a PCB and the PCB Supplier puts it on.  Saves time and labor and has an excellent seal.  You will have to design a masking layer to go with the PCB files, but not a bad way to go.

If it is just general run of the mill, I use Wondermask 2211 (Pink, non-staining).  It is air dry and will also final cure over the pre-heaters.  Otherwise it is an hour (or 2) to air dry.

Prior:

For UV Masks, I used a benchtop dispenser and a UV-A curing station (10 seconds) although I could have probably dialed it back to 5 seconds as it set up pretty quick.  I tried a short UV tunnel (12 inches) right on the line, but did not remind the operator after the tunnel to flip the PCB over BEFORE they started putting parts in, so I cured offline after that mistake.  I used the Dymax 9-20515 (RED).