Potassium stearate or beta nucleator for modification of heterophasic polypropylene blown films or sheets

Abstract

A blown polypropylene film or sheet is disclosed. The film or sheet can include at least 95 wt. % of a polypropylene, and at least one β-nucleating agent or crystallization inhibitor, where the polypropylene blown film or sheet has a thickness of 0.5 mils to 15 mils, and where the polypropylene blown film has an increased dart impact strength, as measure by ASTM D1709, when compared with a second polypropylene blown film or sheet that has the same components in the same wt. % amounts as the polypropylene blown film or sheet except that the second polypropylene blown film or sheet does not include the at least one β-nucleating agent or crystallization inhibitor.

Dependencies are inferred from the claim text.