American motorists discard a lot of tires; roughly one tire per capita, or around 310 million used tires annually. On the average, tire carcasses weigh about 37 pounds, so that’s something like 11 billion pounds of waste rubber and metal every year. In the past, most of these used tires went to dumps, where they were ugly, mosquito – breeding fire hazards. Today, the recycle rate is sufficient to handle this year’s carcasses, while also significantly drawing down inventories at tire dumps nationwide.
Tire dealers add a state–mandated “tipping fee”, usually around $4.00, to each new tire sold. The “tipping fee” is passed on to the tire reclaim firm when the tire reclaimer collects carcasses from the tire dealer. The tire reclaimer converts the scrap tires into some useful form, usually by shredding the scrap tires and separating the rubber from the steel tire cords. The rubber scrap may be processed further, depending on the intended application.
More than half of the recovered scrap rubber is used as tire–derived fuel, burned as an alternate to coal, primarily to fuel cement kilns. Ground rubber has a multitude of uses, ranging from landscaping mulch, to athletic fields, to molded rubber products, and on to de-vulcanized rubber, which can be used to produce new tires.
Generally, tires are made from a mixture of natural rubber and synthetic (SBR) rubber. Natural rubber and synthetic rubber prices are currently near all–time highs, due to high crude oil prices and strong demand, especially in Asia. So, scrap tires offer a big, cost – advantageous and convenient source for rubber products raw materials.
Those who are interested can download a free 105 page report chock full of information on scrap tire products and markets at www.rma.org/scrap_tires.
The take-away for all manufacturers is that the conversion of billions of pounds of scrap from dangerous eye-sore to useful products came to be through the efforts of a trade association. Trade associations offer a particularly useful vehicle for addressing many of the industry-wide problems and opportunities that Sustainability presents.
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