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FEP with wall thickness above 0,8mm

Author	Topic: FEP with wall thickness above 0,8mm
polymerguy Senior Member Posts: 35 From:germany Registered: Nov 2006	posted July 10, 2007 05:15 PM Dear All, We have problems when extruding wallthickness above 0,5 mm. The concentricity is not maintained. any solution for this..... thanks in advance... IP: Logged
Tom C Moderator Posts: 866 From:Brodheadsville, PA USA Registered: Jun 2001	posted July 10, 2007 06:33 PM Depends on what the problem is. I the problem consistent or random? Is there enough resin there in the first place? Weigh a length and check it. Does the melt temperature make sense? FEP is tough to melt, could you have some unmelted material coming through? Since you are trying a thicker wall the backpressure may not be as high, therefore not developing the melt as well. Any gassing out or defects you can see in the surface. ------------------ Best Regards, Tom Cunningham www.ExtrusionTechnicalServices.com IP: Logged
AlexK Senior Member Posts: 8 From:Avon, CT Registered: May 2005	posted July 12, 2007 09:30 AM If you using melt index 7 I would try melt index 2.0-3.0. [This message has been edited by AlexK (edited July 12, 2007).] IP: Logged

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