The Memory Foam Mattress' history could be traced back again to the Ames Research Center of NASA. The Ames Research Center of NASA financed a task to style a bed foam that can help to alleviate back pain of the astronauts caused by gforces in the 1970s. NASA thought that the foam material should be applied to comply with the form of the human body. The person could ultimately move out of the position though creating a shape for the body can help to resolve the issue. Consequently, incorrect pressure points will soon be established around the body. Later, a method to develop a foam that will conform the your body's appearance was discovered by the study team from the Ames Research Center of NASA. It's a visco elastc foam that will equally distribute the human body's weight for the foam floor. sleepjunkie Polyurethane foam product is employed since the foam memory. The bed manufacurers can add several kinds of substances to improve the density of the foam. Following the chemical is added, the foam can have greater thickness. Besides, producer will put in a viscoelastic foam material. The visco elastic foam is nontoxic. The foam weight is detemined by simply how much substances are used inside the foam's production process. Many memoryfoam mattress features a weight of 4 - 5lb. Brighter polyurethane foam bed weight between 2 - 3 pound. The development triggered Fagerdala World Foams of Sweden provide it to the consumers and to test out it. In 1991, a business situated in Sweden, Tempur Pedic offered the people the research mattresss foam in Sweden. After that, Tempurpedic bought the memory mattress foam to the people that live in United States and Canada. The mattress of Tempur Pedic became popular. Tempur Pedic's success had caused the makers to generate their particular types of memory foam mattresses and sell them for the local customers.