Premier Plastic
Fall 1990
| Volume 6
| Issue 2
After reading “A Most Invented Invention,” about the discovery of polypropylene (by David B. Sicilia, Spring/Summer 1990), I will always recall the brilliance of Karl Ziegler as I sit down to enjoy a Dannon yogurt from its plastic container. The article states that polypropylene is America’s fourth-largestselling plastic. What are the top three?
William Harvie
La Jolla, Calif.
David Sicilia replies: The three largestselling plastics are high-pressure polyethylene, low-pressure polyethylene, and polyvinylchloride. (The lay person might consider the first two as one, but to the industry the distinction is quite important.) The two varieties of PE are used in scores of applications; PVC is predominantly fashioned into piping.
