出典:Wikipedia
出典:『Wikipedia』 (2011/06/29 20:30 UTC 版)
Memory foam is polyurethane with additional chemicals increasing its viscosity and density. It is often referred to as "visco-elastic" polyurethane foam, or low-resilience polyurethane foam (see LRPu). Higher-density memory foam softens in reaction to body heat, allowing it to mold to a warm body in a few minutes. A lower-density memory foam is pressure-sensitive and moulds quickly to the shape of a body pressing against it, returning to its original shape once the pressure is removed.
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