Sigma Stretched is pre-stretched for extra strength, higher yield and lighter weight rolls. Sigma Stretched is another unique pre-stretch product engineered to outperform all competitive pre-stretch products in the industry...regardless of thickness. It’s our proprietary blown extrusion process coupled with a conversion process developed in-house, that makes this product The Industry Leader. Sigma Stretched has unrivaled load holding force, puncture resistance, clarity and an aggressive cling package that is well suited for any application.
Crown Packaging Corp.