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  Extrusion, Single Screw
  Gels

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Author Topic:   Gels
plasticman
Member

Posts: 1
From:
Registered: Jun 2001

posted June 04, 2001 11:49 AM     Click Here to See the Profile for plasticman     Edit/Delete Message   Reply w/Quote
How do I get gels out of my extruded profile?

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admin2
Member

Posts: 15
From:fl
Registered: Jun 2001

posted June 05, 2001 11:08 AM     Click Here to See the Profile for admin2   Click Here to Email admin2     Edit/Delete Message   Reply w/Quote
Gels have many causes and therefore many remedies. You can try to filter them out with a tighter screw pack or break them down with a high shear screw. We should first find out where they're coming from to determine the best approach. Are they caused by contaminants, long residence time, poorly stabilized compound, etc....

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Steve H
Moderator

Posts: 386
From:Christchurch,New Zealand
Registered: Jun 2001

posted June 06, 2001 08:33 PM     Click Here to See the Profile for Steve H   Click Here to Email Steve H     Edit/Delete Message   Reply w/Quote
You need to identify what the gel is:

-a contaminate ( dust, hair, other polymer etc)

- crosslinked polymer that you are processing

- unmelted polymer that you are processing


Trying to filter out gels is a lost cause, much better to treat the problem than try
and put a bandaid on the symptom.

Steve

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louis33
Senior Member

Posts: 146
From:Allentown, PA - USA
Registered: Jun 2001

posted June 06, 2001 08:58 PM     Click Here to See the Profile for louis33     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by plasticman:
How do I get gels out of my extruded profile?

You may get more specific answers if you tell us the material and a little more about the process!

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