Posts: 3
From:stoney creek, on, canada
Registered: Apr 2005

posted April 26, 2005 03:28 PM            

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Hello,
We currently produce talc-filled polypropylene and are investigating changing the core resin to HDPE. I am not anticipating any large profile changes in the process. Has anyone had experience with both resins and if so, was there any inherent processing differences?
Cheers

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Posts: 365
From:McHenry, IL USA
Registered: Nov 2002

posted April 27, 2005 10:06 AM               

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The primary difference will be the temperature profiles you select, as polyethylen (LDPE, or LLDPE, or HDPE, or Metalocene PE have different Melt Points (Tm).

Do a DSC on both as this will act as your guide to process the polymer properly.

Remember, if your going to only pellletize these materials - Don't use a screen pack, and above all else, add proper stabilizer systems to them.

Contact Ciba-Geigy for the best to use for each to assure you don't overdoe them.

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Posts: 3
From:stoney creek, on, canada
Registered: Apr 2005

posted April 27, 2005 10:51 AM            

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Thanks for your help, I believe that the DSC(s) are under way as I type.
Cheers

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