Separation of floor covering components for recycling
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United States of America Patent
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Jan 4, 2005
Grant Date -
N/A
app pub date -
Jul 20, 2001
filing date -
Nov 5, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to methods for processing floor coverings (100), such as carpet and/or carpet tile, having at least one layer containing a polyurethane (104), such that at least this polyurethane--containing layer (104) can be recycled and reused. The method involves contacting the floor covering (100) with an organic polyol (110) and heating (120) it, so that the polyurethane--containing layer (104) softens and/or partially liquefies, but can be resolidified by contact with additional polyisocyanate (140).
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Cited Art Landscape
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