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| Author | Topic: Anyone have Fep experience |
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mademan5284 Senior Member Posts: 6 |
posted August 21, 2005 06:42 AM
   
If so I am using Daiken np20 with 12% barium and I make single lumen medical tubing. The color is white of course. My problem is; to achieve constant uniform size my pressure needs to be stable as I run wall thicknesses down to .004. With many different walls,OD,and ID our tooling must change and our rpm's. The heats are constantly changed and never give the best pressure deviation. When it is difficult to hold size to spec every shift plays with different combinations somtimes resulting in cleaning out the extruder. Using 1 1/4" killion/Davis standard extruder. Tooling is conical shaped tapering down to land before exit. Any info at all would be helpfull. ------------------ IP: Logged |
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Tom C Moderator Posts: 594 |
posted August 21, 2005 09:24 AM
Mademan, I have all the tools required to resolve your problem, have done consutling for Daiken, have a good friend with technical responsibilities at Daiken and have worked a great deal with micro-extruders. I even live within 1/2 hour of your location. What more could you ask for? Please have someone call 570-992-0961 to set up a visit. ------------------
Tom Cunningham
Extrusion Technical Services [This message has been edited by Tom C (edited August 21, 2005).] IP: Logged |
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louis33 Senior Member Posts: 129 |
posted August 22, 2005 10:32 AM
Hummm, thought you guys were the experts in FEP? IP: Logged |
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Tom C Moderator Posts: 594 |
posted August 22, 2005 01:38 PM
Hey Louis, Go easy! We don't want to drive away participants by having them worry about criticism or proprietary concerns. ------------------
Tom Cunningham
Extrusion Technical Services www.ExtrusionTechnicalServices.com IP: Logged |
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Tom C Moderator Posts: 594 |
posted August 30, 2005 02:19 PM
The subject of fluoropolymer extruision and safety concerns came up elsewhere, so I have decided to offer this link for and excellent manual: http://www.plasticsindustry.org/business/literatu.htm Search on the page for "Guide to the Safe Handling of Fluoropolymer Resins" by the Fluoropolymers Division of the SPI. It is very comprehensive and I feel is a must read for anyone dealing with fluoropolymer processing. ------------------
Tom Cunningham
Extrusion Technical Services www.ExtrusionTechnicalServices.com IP: Logged |
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louis33 Senior Member Posts: 129 |
posted August 30, 2005 03:34 PM
Did you check with John in the compounding department to see what changed? That stuff used to run like clockwork! Even we are having problems with it now. IP: Logged |
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alpertl Senior Member Posts: 41 |
posted September 17, 2005 02:07 AM
quote:
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mademan5284 Senior Member Posts: 6 |
posted September 17, 2005 06:26 PM
Do I know you? How do you know John. We have to talk plastic if you don't mind. I have been meaning to talk to you about fluoropolymers. If your having material problems I might have a solution. Or if any other problem I could help you with. IP: Logged |
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mademan5284 Senior Member Posts: 6 |
posted September 17, 2005 06:32 PM
I'd really like to talk about sizing plates or sizing rings. IP: Logged |
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