Benefits of Coextruded LLDPE / LDPE Filmvs.Blended LLDPE / LDPE Film

摘要

The benefits of three-layer coextrusion versus a mono-layer blend of the same resins are explored. Good designconsiderations of the coextruded structure can allow a processor to take advantage of the performance characteristicsof the resins and the equipment. These performance characteristics can be compromised in a mono-layer blend of thesame materials. Expected benefits of coextrusion can be improved physical properties and reduction in additives requiredfor good processing. These are accomplished by eliminating blends of LDPE and LLDPE, reducing the draw-down ratioand taking advantage of the rheological differences between LDPE and LLDPE.