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The Difference Between Normal Foam and Memory Foam

Slow rebound memory pillow also known as memory cotton memory pillow, can reduce the pressure on the head and neck, that is to absorb the pressure of the human body. When the human body contacts the material, the material will sense the temperature of the human body and gradually become soft. At the same time, it absorbs the pressure of the human body, thus adjusting the human body to the most comfortable posture. What is shown on the mattress and pillow is that when people lie on the mattress and pillow, the spine is in S-shaped natural physiological bending state, while the spine does not bend when lying on the side. At the same time, mattresses and pillows have no compression point on the human body, which is the material.


What are the differences between normal foam and memory foam?


First, let's learn what is foam. What is memory foam?


The sponge is a porous material with good water absorption and can be used for cleaning items. The sponge is usually made of lignocellulose fiber or foamed plastic polymer.

The main process of sponge is: mixing foam resin, foaming agent and adhesive resin (to make the finished product have adhesiveness) together, and then carry out foaming processing. The foam sponge was prepared by mixing 80 parts of vinyl acetate (EVA), 20 parts of apaopt3385, 20 parts of Azodicarbonamide, L9 parts of CaCO and 0.6 parts of diisopropyl peroxide, then place it in the mold to foam and break the closed cells with mechanical force to make foamed sponge. The density (d) is 0.028g/cm and the 25% compression hardness is 1.9kpa.


Memory foam is also called inert sponge, slow rebound memory foam, low rebound sponge and slow elastic sponge. According to the different process, it can be divided into polyether foaming series and MDI molding series. 


The memory foam is a kind of special material, and the memory foam is a kind of material that can deform according to the change of body temperature. When the slow rebound sea surface is pressed, it will not produce rebound force until all the pressure is evenly distributed. When the external force extrusion stops, it will slowly return to its original shape. Memory foams are extremely sensitive to temperature and weight. They become softer in hotter environments and harder in colder environments. Therefore, this kind of material can be close to the concave convex figure of human body, contact and support the back of human body. In contrast, the traditional sponge is not sensitive to temperature and cannot support the shape curve comprehensively.


The memory foam is a combination of softness and toughness. The standard test shows that after 80000 times of compression, the deformation and depression degree of memory foam is 5% less than that of ordinary polyurethane. The deformation depression degree of ordinary high elastic sea surface reaches 10-15%.


Due to the characteristics of memory foam, the possibility of tossing and turning in bed is greatly reduced, and the sleep quality is improved. Medical research shows that sleeping on a memory foam mattress can reduce the average number of turns on the bed from 80-100 times to 17-20 times. The reduction of pressure is the main reason for feeling comfortable.


The memory foam is a high-tech material designed and developed for the space program by American space agency. It is designed for astronauts to help relieve the pressure on them during takeoff, landing and flight. Due to the characteristics of memory foam in pressure relief, slow rebound pillow and mattress can let the body rest in a natural pressure free position.

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