Memoryskum

Memoryskum, also known as visco-elastic foam or low-resilience polyurethane foam, is a type of material that conforms to the shape of an object pressed against it, and then slowly returns to its original form. This property is due to its unique cellular structure, which allows it to absorb and dissipate energy.

The primary component of memoryskum is polyurethane, a polymer that can be engineered with varying densities and firmness. Additives are used to increase the viscosity and density of the material, resulting in its characteristic slow-recovery time. When pressure is applied, the air within the foam's cells is slowly pushed out, causing the material to deform. As the pressure is removed, the air gradually re-enters the cells, allowing the foam to regain its original shape.

Memoryskum was originally developed by NASA in the 1970s to improve the safety and comfort of aircraft seat cushions. Its ability to evenly distribute pressure and absorb impact made it ideal for this application. Since then, it has found widespread use in various products, including mattresses, pillows, shoe insoles, and protective padding.

The benefits of memoryskum include its pressure-relieving qualities, which can help reduce aches and pains, and its ability to conform to the body, providing personalized support. However, some users find that it can retain heat, leading to a warmer sleeping experience, and that it may have a distinct odor when new. Its slow recovery can also make it feel less responsive for some applications. Despite these considerations, memoryskum remains a popular material for its unique comfort and support characteristics.