Influenced Of Three-layer Materials On Mattress Comfort

In this paper, some experiments were done to test the factors, such as temperature, humidity, body pressure distribution, muscle fatigue, and so on, which affect human sleep. The comfort of spring mattress influenced by three-layer structural materials was investigated. According this conclution, the best allocation of the mattress was identified, and the divisional was designed. This conclusion is as follows:1) Three-layer structural materials such as spongblanket and spring material directly affects the comfort of mattress through indicators, which is temperature, humidity , body pressure distribution, muscle fatigue. It is showed that sponge material directly affects the thermal comfort of spring mattress;the indicators of body pressure distribution changes with the material properties of mattress regularly.2) Different properties of the layered material directly affects the comfort of spring mattress differently.Based on which the best allocation of the mattress was pointed out correspondingly. The best allocation of common spring mattress is:the sponge layer for foam sponge which the thickness is 3 or 4cm,the density is 25kg/m~3, the blankets layer for blankets which the hardness is 223N/mm, the spring layer for double tapered spring which the spring coefficient is 0.82N /mm. and more,Similar properties of the layered material affects the comfort of human local body differently,Based on which divisional layer of mattress was designed.3) The three indicators combined by EMG, body pressure distribution and subjective evaluation is an method to evaluate the comfort of mattress.according this study ,it is can be done to prodive a scientific basis to design and manufacture.