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foam rubber

noun
1.
a light, spongy rubber, used for mattresses, cushions, etc.
Origin
1940-1945
1940-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for foam-rubber

foam rubber

flexible, porous substance made from a natural or synthetic latex compounded with various ingredients and whipped into a froth. The resulting product contains roughly 85 percent air and 15 percent rubber and can be molded and vulcanized. Its uses include padding for furniture, mattresses, and pillows. In special processes, a blowing agent is incorporated into the latex to liberate gas during vulcanization, forming small closed cells; the resulting foam is nonabsorbent and useful for thermal insulation, as in refrigerators. Molded into sheets, it is used in gaskets, weather stripping, and vibration-damping materials

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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9
10
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