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| Author | Topic: tie layer cosmetics |
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mitch Senior Member Posts: 11 |
posted May 10, 2005 09:29 AM
  
I am running trials with Orevac 18360 as a tie layer. Unfortunately my cosmetics are poor. i have narrowed it down to the tie layer and am also guessing it has to do with screw speeds. Outer layer running 4 times faster than tie layer. Any advice greatly welcome. Thank you IP: Logged |
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Tom C Moderator Posts: 533 |
posted May 10, 2005 11:43 AM
Mitch, Cosmetic problems in co-extrusion typically are related to velocity and/or viscosity differences between the different polymer flows in the die. One polymer melt will stress the other as they merge causing flow patterns and optical distortion. A company that I represent has a great deal of expereince using computer modeling to identify and resolve these issues. Please send an email if you are interested in more information. ------------------
Tom Cunningham
Extrusion Technical Services www.ExtrusionTechnicalServices.com IP: Logged |
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Steve H Moderator Posts: 364 |
posted May 13, 2005 05:45 PM
What's the application Mitch? Blown film or blow moulding. Exactly what sort of cosmetic problems are you getting? Steve ------------------ If at first you don't succeed, skydiving is not for you. IP: Logged |
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lianis Senior Member Posts: 13 |
posted June 02, 2005 09:04 AM
test 2 IP: Logged |
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