A mattress is a piece of bedding used for sleeping. Memory foam mattresses are special types of mattresses that are pressure and temperature sensitive. The origin of memory foam mattresses took place in a very grand manner. In the 70s NASA was working on manned rockets. Manned rockets exert a lot of G-force on the astronauts, which can harm the astronaut. NASA scientists were trying to develop a material that was breathable and molded itself to the astronauts body to reduce the G-forces on the astronaut. They developed a polyurethane foam material which had the property of visco-elasticity and which could be used for the purpose. Though polyurethane foam was never used in the space program, it got to be used in beddings and pillows later.
Matter is classified into three states solid, liquid and gases. Visco elastic materials are materials that exhibit the properties of both solids and liquids. Polyurethane foam is used in memory foam mattresses due to its property of visco-elasticity. Memory foam mattresses are able to distribute pressure evenly and are able to return to their original shape when the pressure is removed. Memory foam mattresses shape themselves according...
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