Borealis: New PP Runs Clear on Standard Blown Film Lines
Unveiled in cooperation with Kiefel Extrusion at June’s NPE show in Chicago, new Borclear RB707CF polypropylene from Borealis Group is said to overcome conventional PP limitations in blown film. It delivers superior optical properties in combination with good processability and excellent stiffness/tenacity balance, and is intended for coextrusion as sealing layer in flexible packaging.
Borealis recently developed a new class of polypropylene random terpolymers called Borclear. The latest development in this unique family is the RB707CF grade for extrusion of blown film on conventional lines. Up to now the majority of PP grades were limited in this kind of processing, due to their poor processability, low tenacity, and especially poor optical properties. Processability of Borclear RB707CF with 1.8 MFR was demonstrated at NPE on a Kirion blown-film coex line from Kiefel Extrusion GmbH of Germany, represented here by Kiefel Inc., Wrentham, Mass. The new resin is also said to show very good sealability and seal strength, as well as excellent bonding to metallocene PE grades. Borealis intends to supply this resin to U.S. customers directly from Europe.
For further information, contact Anton Wolfsberger, Borealis GmbH, Business Unit Film & Fibre in Linz, Austria. Tel: +43 732 6981 088, E-mail: anton.wolfsberg er@borealisgroup.com.