Foam mattress is a form of bed that is made from memory. Besides polyurethane, it is also made from other forms of substances. The compounds which are added to the bed foams gives it the capacity to increase in density. Memory foam mattress is also called viscoelastic polyurethane foam. The bed was created as a way to meet up with the need of the mattress customers.The Memory Foam Mattress' annals might be traced back again to the Ames Research Center of NASA. NASA's Ames Research Center financed a project to design a mattress foam that will help to relieve back pain of the astronauts due to g-forces inside the 1970s. NASA believed that the foam material must be applied to conform to the design of the human body. Anyone would eventually transfer of the position although making a shape for the body can help to solve the problem. Consequently, inappropriate pressure points will soon be formed to the body. Later, the study team from NASA's Ames Research Center found ways to develop a foam that can evolve the your body's appearance. It is a elastc foam that could consistently spread the weight of your body for the foam floor.research brand names with the help of sleepjunkieThe development triggered Fagerdala World Foams of Sweden promote it towards the buyers and to try out it. In 1991, Tempurpedic, an organization situated in Sweden bought the research mattresss foam towards the people. Next, Tempurpedic bought the memory mattress foam to the people that live-in Canada and Usa. The bed of Tempurpedic became highly popular. The achievement of Tempurpedic had caused the producers provide them for the local buyers and to make their own versions of polyurethane foam mattresses.Synthetic polyurethane foam material can be used while the foam memory. The bed manufacurers will incorporate several types of substances to improve the density of the foam. The foam may have greater density, following the compound is added. Besides, the maker will put in a visco elastic foam product. The viscoelastic foam is non toxic. How much chemicals are utilized in the manufacturing procedure for the foam detemins the foam weight. Many memory foam mattress has a weight of 4 - 5lb. Brighter memory foam bed weight between 2 - 3 lb.