Mineral Reinforcement of Metallocene-Catalyzed LLDPE Film and Bags, 2000 Polymers, Laminations & Coatings Conference Proceedings

F. A. Ruiz--This paper details the effects of adding 7.5% & 15wt.% calcium carbonate to three different film resins; two metallocene-catalyzed linear polyethylenes and a conventional Ziegler-Natta catalyzed PE film resin. An LLDPE-based pelleted 75% calcium carbonate concentrate was used to prepare dry blends with the base resin. These dry blends were extruded into 33m (1.3 mil) films on a 63mm (2.5”), 24/1 L/D extruder fitted with a 225mm (9”) die and 1.4mm (0.055”) die gap.

Increasing mineral loading from 7.5% to 15% CaCO3 did not have a significant effect on output rate or other extrusion conditions. Higher levels of mineral concentrate did increase dart impact strength, tear strength, and tensile yield for different film resin blends.

Author: Ruiz, F.A.
Mineral Reinforcement of Metallocene-Catalyzed LLDPE Film an
Mineral Reinforcement of Metallocene-Catalyzed LLDPE Film and Bags, 2000 Polymers, Laminations & Coatings Conference Proceedings
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