Plast '09-Milan: Borealis puts stop to stress cracks with new closure grades

The supplier credits its multimodal PE reactor technology with supplying grades that have a higher flow than PE made on unimodal reactors, but with a similar melt flow rate so that processors—injection or compression molders--—can lessen holding pressure. The lower holding pressure leads to reduced internal stress that in turn creates a higher level of environmental stress cracking resistance (ESCR) for the finished caps. —[email protected]