C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/08 (2006.01) B01D 53/04 (2006.01) B29C 44/56 (2006.01) C08J 9/36 (2006.01)
Patent
CA 2097856
ABSTRACT A method and apparatus for the continuous production of flexible open cell polyurethane foam, where a process air stream is drawn through the interior of the foam material after it has completed its rise to thereby accelerate the cooling of the foam material. The process air stream contains vaporized constituents which are removed by the steps of: (a) collecting the air stream from the foam material; (b) passing the air stream into an adsorption expansion chamber having a cross-sectional area adapted to reduce the flow rate of the air stream; (c) passing the air stream into an adsorption chamber; (d) passing the air stream through at least one activated carbon char filter bed located in the chamber at a flow rate that is adapted to provide sufficient residence time for the removal of the vaporized constituents drawn from the foam material; and (e) discharging the treated air stream into the atmosphere.
Osler Hoskin & Harcourt Llp
Pmc Inc.
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