Abstract
MINDFUL OF FIRESTONE'S recent tire problems, Goodyear and Michelin are working on new-generation polyurethane technology that may be the key to making tires less prone to tread separation and blowout. Goodyear has signed an agreement to jointly develop an all-polyurethane car tire with Amerityre, a six-year-old Boulder City Nev., company that now makes polyurethane bicycle tires but has produced demonstration car and light-truck tires. According to Richard A. Steinke, Amerityre's president and CEO, a mixture of polyol, methylene diphenyl isocyanate (MDI), and a proprietary package of four additional ingredients can be injected into a mold containing a tire bead and reinforcement fabric and then spun to ensure a perfectly round tire Unlike conventional tires made by bonding several layers, monolithic polyurethane tires not subject to belt separation could be made on automated equipment to allow more rapid tire production at costs comparable to tires made today, Steinke says. The tire has a number of skepti...
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