Methods, systems and compositions for fire retarding substrates
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United States of America Patent
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May 1, 2007
Grant Date -
Jun 24, 2004
app pub date -
Nov 26, 2003
filing date -
Nov 29, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A closed-loop system and process is used for applying fire retardant chemicals to fibers. Fibers are preferably positioned in a vessel such as a dye machine which circulates the fire retardant chemicals. After absorption of the fire retardant composition, non-absorbed fire retardant chemicals are recovered and re-used on subsequent batches of fibers. Recovery can be achieved by directing the non-absorbed fire retardant composition into a second dye machine containing additional fibers, or by extracting the fire retardant composition by centrifugation or other means, or by a combination of the two processes. The process is environmentally friendly, and allows for higher throughput on impregnating fibers with fire retardant chemicals.
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