posted June 11, 2009 02:42 PM            

Core: Borealis, BORPACT BC 918CF, MFI=3, Density=0.903 mixed 20% of Elit 5401G, MFI=1, density =0.917

Both skins: Borealis, BORCLEAN RB 707CF, MFI=1.5, density=0.905 blended 20% of Elit 5401G MFI=1, density=0.917

The bubble facing instability. It causes gravimetric dosing unit of all extruders doing the wrong mixer ratio.

Do you have any experience on this, please let me know the possible causes and remedies.

Thanks in advance with best regards,

posted June 12, 2009 09:22 AM            

http://www.ptonline.com/articles/200706ts1.html\
http://www.ptonline.com/articles/200212ts1.html

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Best Regards,

Tom Cunningham

posted June 15, 2009 02:05 AM            

Actually I want to make sure that about the blending of materials in my recipe for this borealis grades.

Please let me know whether Dow-Elite 5401 can blend with Borealis- Borpact 918CF, I am facing bubble instability and Improper mixing in gravimetric system.

Can we Use Daploy 180 HMS grades in blown film application for bread bags.

Awaiting your reply

Thanks in advance with best regards,

posted June 15, 2009 08:51 AM            

Are you expereincing coextrusion wave instability in the film?

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Best Regards,

Tom Cunningham

posted June 16, 2009 02:07 AM            

Actually I want to know more grades of Polypropylene that can run smoothly in Blown Film plants for application like bread bags, stand up pouches.

Please let me know material grade of PP of Dow, Borealis and Exxon mobile.

The problem is mixing in barrel and gravimetric system doing wrong mixer ratio.

Thanks with best regards,