Memory foam mattress can be a form of mattress that's produced from polyurethane. Besides memory, it is also created from other types of chemicals. The compounds which can be put into the bed foams gives it the ability to increase in density. Memory foam mattress can be called viscoelastic memory foam. The mattress originated to be able to meet the mattress shoppers' desire. The history of the Polyurethane Foam Mattress could be traced back to the Ames Research Center of NASA. The Ames Research Center of NASA borrowed a project to design a bed foam that will help to ease pain of the astronauts caused by g-forces back in the 1970s. NASA assumed that the foam material must be applied to comply with the body's design. The individual could ultimately move-out of the career, although making a form for the body can help fix the situation. To the body, inappropriate pressure points will soon be established as a result. Later, the investigation group from NASA's Ames Research Center discovered ways to produce a foam that will conform the the body's design. It is a elastc foam that can consistently spread the weight of the human body for the foam area. sleepjunkie knows the causes Polyurethane foam material is employed while the foam memory. The bed manufacurers can incorporate several kinds of chemicals to improve the density of the foam. The foam can have greater thickness after the chemical is included. Besides, producer may put in a viscoelastic foam product. The viscoelastic foam is non toxic. How much substances are utilized inside the production procedure for the foam detemins the foam fat. Most memory foam mattress features a fat of 4 - 5lb. Lighter memoryfoam bed weight among 2 - 3 pound. In 1991, a company located in Sweden, Tempur Pedic offered the research mattresss foam towards the people in Sweden. Next, Tempur Pedic bought the memory mattress foam for the people that are now living in Usa and Canada. Tempurpedic's bed became very popular. The achievement of Tempurpedic had caused the companies to create their own variations of foam beds and provide them to the local customers.