High Strength, High Barrier Polymeric Packaging Film Based on Multi-Layered Structure
발표자
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초록
내용
Polyolefins have attracted considerable attention as packaging materials because of their outstanding light weight, flexibility, strength, transparency, and facile processability. Herein, we manufacture high strength, high barrier LLDPE films with limited amount of EVOH using co-extruder with layer multiplier. To achieve high barrier and high strength property, structures of films were carefully designed to have 1, 2, 4, 8 layers of EVOH, while maintaining the overall thickness of EVOH and LLDPE. The oxygen permeability of multilayer films was significantly decreased from 0.1 to 0.01 cc/m2·day·atm when the films have 8 layers of EVOH. In addition, the mechanical properties of multilayer films, such as elongation and toughness, were improved as decrease the thickness of each EVOH layer, which suggests a promising possibility in packaging applications.