Process for the production of composite foamed material
OwnerSeymour Lichter, Frank P. Noldinventors
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Abstract
A composite foamed material and a process for the production thereof are disclosed herein, the process comprising premixing expandable or expanded polystyrene beads, a binder and fragments of resilient, open-celled neoprene. The materials are combined in the proportions of about 4-15% polystyrene beads, about 6-25% binder and about 60-90% open-celled neoprene. The combined materials are preferably compressed to a density of about 5-30 lbs. per cubic foot, more preferably 5-17 lbs. per cubic foot, and steam is applied to the compressed materials to cure the binder, and in certain embodiments to expand the polystyrene beads, thereby producing the desired composite foamed material.
Claims14
A process for producing a flame-resistant composite foamed material which comprises the steps of:
- a. combining into a mix from about 4% to about 15% of expandable or expanded polystyrene beads, from about 6% to about 25% of a binder and from about 60% to about 90% of fragments of resilient, open-celled neoprene;
- b. compressing the mix within a mold to a density of from about 5 to about 30 lbs/ft.sup.3 ;
- and
- c. curing the binder while the mix is held in compression.
Dependencies are inferred from the claim text.