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MAPP Plastics Discussion Forum

The MAPP Plastic Industry Discussion Forum allows members to rapidly communicate with each other. Post both questions and answers to questions that other MAPP members have about any industry topic from material and process issues to R&E Tax Credits and other business issues.

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Posted:  28 Jul 2008 19:53
We have many new color programs that require running changes. We have been using a lot of material to purge the manifolds and barrell. We were hoping that somenone might have a procedure or compund we could try that will minimize our waste.

Bob Holbrook
Posted:  30 Jul 2008 18:44
Hi Bob.

I noticed your post. MAPP had a web seminar back in June regarding purging compounds that some of our people found very helpful. There is a PDF of the presentation on this site in the "member section" under "events archive."

Purging Compound Info

Cindy Paris
Posted:  02 Aug 2008 01:18   Last Edited By: Troy Nix
Bob, Cindy is correct.  MAPP did host put on a special session on purging compounds in the month of June which was hosted by Asaclean, and the feedback from the attendees was overwhelmingly positive. 

Matt Hlavin of Thogus Products had his process people attend the seminar and is now TESTING samples of different types of the Asaclean Compounds in his plastics injection molding machines.

If you want some samples of the material, you can contact Joe Serell at 973-257-1999 x-233 or email at jserell@asaclean.com. 

Something that I learned during this presentation is that utilization of purging compounds is a common practice in Japan as it is used by roughly 80% of the plastics processors.  In contrast, this practices is used by roghly 20% of the molders in the US.  There seems to be a solid case to at least investigate which type of compound might be best for your applications in order to reduce changeover time caused by cleaning barrels, screws, injection tips, etc...
Posted:  07 Aug 2008 20:22
We also do lots of color changes and have found an effective purge compound.  We currently use CleanPlast CP-P from RGL Sales in Noblesville.  The contact is Rochelle Lemieux and her number is 317-770-3680.  We do all pharmaceutical molding and need to make sure that all previous colors are removed before starting the next batch and this outperformed the Asaclean compound that we were using.

Dennis Kelley
Posted:  14 Aug 2008 22:57
Hello Dennis,
We make it a point to keep constant contact with our customers to ensure the ASACLEAN is working as well as it should – unfortunately, we were not aware that your company was having any purging issues while using the ASACLEAN. Sometimes, resolving these issues is as simple as going over purging procedures or it may mean trying a different grade. We have also recently introduced several new-generation grades with better cleaning power and lower-residue characteristics. We would appreciate the opportunity to speak with you to see what the issues were before switching to a different purge. We have many former users coming back to us too. Thank you.

John Pizzo
Posted:  18 Aug 2008 22:51
John,
That would be great.  Please contact Tim Larrison at our facility in Edinburgh.  He is our Process Manager and handles all of the color change procedures as well as purge compounds.  We are always looking for better ways to get to the bottom of problems.  Thanks

Dennis Kelley
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