Abstract
EARTH MOVERS USE THEM. SO DO forklifts, roller coasters, and mining equipment. They are polyurethane tires, or rubber tires filled with polyurethane foam, and they are engineered to endure the heavy lifting, pushing, rolling, and other punishing conditions to which industrial equipment is subjected. These tires do not deflate, don't suffer from blowouts, and survive under the most trying conditions. But the jury is out on how far polyurethane can penetrate the automobile tire market. Many observers think polyurethane's use will be limited to only a modest application, as inserts for new runflat tire systems. One small firm, however, Boulder City, Nev.-based Amerityre, sees polyurethane as the wave of the future.ees polyurethane as the wave of the future. Ever since the Bridgestone/Firestone tire debacle in 2000, when underinflated tires on Ford's Explorer sport-utility vehicle contributed to a spate of fatal accidents, manufacturers, government regulators, and consumers have eagerly sought more ...
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