Noise Insulation Pad Performance

As engineering need noise reduction and heat preservation pad was developed out.In this paper,comprehensive research was done for each major component. Studied the performance of flame retardant, noise reduction by absorption, aging of Low Resilience PU Foam. Studied flame retardant mechanism, method what can improve flame retardant, and so on. And had a contrast for the performance of flame retardant between Low Resilience PU Foam and Flexible PU Foam. The sound absorptivity of Low Resilience PU Foam was discussed,and got the influencing degree of each influencing factor to its acoustical absorptivity. The viscoelastic property's influence on acoustical absorptivity is studied by finite element method (FEM), and the relationship between the macroscopical physical properties and the acoustical absorptivity is researched by experiment. Has established the artificial aging testing program based on national standards,and has detected and analysed the acoustical absorptivity of Low Resilience PU Foam dealt by artificial aging. Compared with the outcome of self aging, I got the simple relationship between self aging and artificial aging. By combining the theory of acoustic and vibration, material science and using FEM, the design principle for noise reduction and heat preservation pad was studied in this paper, and then it is presented that the noise reduction can be predicted by finite element method in that it is proved that the FEM results is well coincident with the experimental ones. The heat preservation performance of Polyethylene Foam was also studied in this paper.