Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1992-12-11
1996-04-09
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264102, 264321, 264DIG69, B29C 4304
Patent
active
055058868
ABSTRACT:
A method and apparatus are provided for densifying expanded polymer materials such as styrofoam for transportation between collection centers and manufacturing plants for recycling. The method and apparatus use only pressure and time with no addition of heat which would render the expanded polymers non-recyclable or impure. The method and apparatus rely on mechanical creep over a relatively long time with no binding materials or restraining packaging which would have to be removed prior to remanufacturing. The method and apparatus compress the expanded polymer material in three directions and confine it for the period of time required for the polymers to mechanically creep to a permanent block having a high density. The high density will not expand significantly after the block is released, unconfined into the ambient. The blocks may be easily loaded for efficient, economical transportation.
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Baugh Mark R.
Goodwin Jerry L.
Nielsen Reed M.
Kuhns Allan R.
Utah State University Foundation
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