News tidbits on other plastics in the industry:
A new device for processing polystyrene has been patented by Joseph Sanders of Glendale, Kentucky. Outlined in Patent No. 7,696,305, the machine heats and dissolves scrap polystyrene in to an organic solvent, before separating out the recoverable material.
Patent No. 7,696,255 has been awarded to Danish firm Wietek Holding GmbH, for a new plastics recycling process. Scrap plastics are dissolved in an organic solvent under heat and pressure and then recovered by evaporating the solvent.
Tokyo’s Nippon Steel Corp. has been awarded Patent No. 7,695,669 for a method of reutilizing and shaping waste plastic. Scrap material is heated and compressed to yield a plastic granular material having an apparent density of 0.7 to 1.2 kilograms per liter.
For more information on these or any patents, please consult the U.S. Patent Office database online.
Copies of patents can be ordered by number for $3 each from the Commissioner of Patents and Trademarks, P.O. Box 1450, Alexandria, VA, 22313-1450.
Cited by Plastics Recycling Update
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