Polypropylene Homopolymer

High fatigue resistance polymer used in living hinges.

Core Principles & Analysis

• Giulio Natta first produced stereoregular isotactic polypropylene in 1954, work honored by the 1963 Nobel Prize in Chemistry shared with Karl Ziegler.
• At about 0.905 g/cm³ it is the least dense major commodity plastic and floats on water.
• Its fatigue resistance lets one-piece molded living hinges on flip-top caps survive millions of open-close cycles without cracking.

Specifications & Metrics

• DENSITY: 0.905 g/cm³
• YIELD STRENGTH: 35 MPa
• HARDNESS: 72 Shore D