Commingled post-consumer waste plastics are virtually worthless as recycling stock. Most waste plastics are landfilled, but U.S. landfill space is growing scarce and disposal costs are continually rising. One way to control disposal costs and waste volumes is to develop new products from plastic wastes. Some products of this type construction materials called plastic lumber have already reached the commercial market. Plastic lumber has some advantages over wood (e.g., it ...
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