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AssigneeSealed Air Corporation (US)
InventorsShau-Tarng Lee, Claes Hermansson, Brent Sholl
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The invention is directed to a composite foam material that is alkaline and heat resistance. The composite foam material comprises a foam layer that having a film layer attached thereto and in which at least one of the film or foam layers includes a carbon free radical scavenger agent that is dispersed therein. The carbon free radical scavengers neutralize free radicals that are generated in the polymeric material (e.g., film or foam layer) and help prevent the degradation of the foam composite material. In particular, foam composite materials in accordance with the present invention can be used in underlayment applications in which exposure to heat can degrade the underlayment. As a result, the durability and useful life of the composite sheet material can be extended. In some embodiments of the present invention provides a floor underlayment material that overcomes many of the problems discussed above.
A foam composite comprising a foam layer and a barrier film layer having a surface attached to said foam layer, wherein at least one of the foam and film layers includes a carbon free radical scavenger agent dispersed therein, the carbon free radical scavenger exhibiting a scavenging activity over a temperature range between about 0° to 70° C.
The foam composite of claim 7, wherein the foam layer does not include a carbon radical scavenger and wherein the foam is a crosslinked polyolefin and the film layer comprises polyethylene having a moisture vapor transmission rate of about 0.8 grams/day/100 in2 at 100° F., 90% relative humidity as per ASTM F1249-01.
The foam composite of claim 8, wherein the free radical scavenger is a hindered amine.
A floor underlayment material configured to reduce or prevent degradation of the underlayment material due to heat liberated by reaction of water and calcium chloride:
A flooring system comprising:
A method of installing a finished floor over a subfloor comprising:
Dependencies are inferred from the claim text.