Plastic cable producer Igus Inc. has developed a tribologically optimized plastic plain bearing that requires neither oil nor grease as a lubricant. Since they are lubricant-free, no contaminants escape into the environment. The manufacturing of the bearing is also eco-friendly. The amount of oils used in plastics' manufacturing is also very positive in comparison with aluminum and steel production. Energy from 16 quarts of oil is necessary to produce 1 quart of aluminum, 12 quarts for steel. For 1 quart of plastic, only 1.9 quarts of oil is necessary.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
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